CN116816806A - Self-lubricating roller bearing without independent check ring and preparation method and application thereof - Google Patents
Self-lubricating roller bearing without independent check ring and preparation method and application thereof Download PDFInfo
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- CN116816806A CN116816806A CN202310789455.5A CN202310789455A CN116816806A CN 116816806 A CN116816806 A CN 116816806A CN 202310789455 A CN202310789455 A CN 202310789455A CN 116816806 A CN116816806 A CN 116816806A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/121—Use of special materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/40—Alloys based on refractory metals
- F16C2204/42—Alloys based on titanium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/43—Aeroplanes; Helicopters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention provides a self-lubricating roller bearing without an independent check ring, and a preparation method and application thereof, and belongs to the technical field of self-lubricating roller bearings. According to the invention, dust-proof holes are formed at two ends of an outer ring of the bearing, tapered holes capable of bearing axial thrust are formed between the dust-proof holes and an inner hole of the outer ring, an outer conical surface matched with the tapered holes of the outer ring is formed at one end of the inner ring of the bearing, a rotary outer convex body complementary with the tapered holes of the outer ring is arranged at the other end of the inner ring of the bearing, the outer ring of the bearing is sleeved on the inner ring of the bearing, a rotary outer convex body extending section of the inner ring of the bearing is stamped to form an outer conical surface matched with the tapered holes of the outer ring, a self-lubricating material filling cavity is obtained, a cylindrical mandrel is pressed in the axial through hole of the inner ring of the bearing in an interference fit mode, the self-lubricating material is filled into the filling cavity, play is obtained by removing the mandrel, and the molded self-lubricating roller bearing is manufactured. The method reduces the stamping forming difficulty, improves the manufacturing efficiency, effectively prevents the gasket abrasion caused by the entry of pollutants into the rollaway nest, and improves the reliability and service life of the bearing.
Description
Technical Field
The invention relates to the technical field of self-lubricating roller bearings, in particular to a self-lubricating roller bearing without an independent check ring, and a preparation method and application thereof.
Background
The self-lubricating roller bearing is a bearing which utilizes self-lubricating materials to replace rolling bodies, the traditional rolling friction pair is converted into a sliding friction pair, the self weight and the volume of the roller bearing are reduced, a complex oil supply device required by oil lubrication is omitted, and the usability and the reliability of the roller bearing are greatly improved. The self-lubricating roller bearing has the advantages of compact structure, light weight, high bearing capacity, no maintenance, long service life, self lubrication and the like, is widely applied to the positions of slat and flap sliding rail pulley frames and the like of large-scale airplanes, and is an important substitute product of the traditional roller bearing.
The load carrying capacity, self-lubricating characteristics and service life of self-lubricating roller bearings are primarily dependent on the performance of the self-lubricating pad. As disclosed in US4048370a and US4134842a, the self-lubricating roller bearing is originally designed by adhering a self-lubricating pad material to the inner surface of the outer ring of the bearing and to both side end surfaces thereof, so as to lubricate the raceway, but the self-lubricating material is often contracted radially during reaction molding or cooling, so that the binding force between the self-lubricating material and the outer ring of the bearing is reduced, even falls off, and the reliability and service life of the bearing are seriously affected. U.S. patent No. 4717268A also discloses a self-lubricating roller bearing of the above-described construction, which indicates that the self-lubricating pad is stretched by frictional shear stress during rotation of the outer race, creating a wedge-shaped cavity before movement, and that liquid contaminants enter the cavity to create a wedging action that increases the load on the pad, resulting in pad failure. The self-lubricating bearing structure of the self-lubricating roller is improved in importance, namely, a self-lubricating material is adhered to the outer cylindrical surface of the inner ring of the roller bearing, the self-lubricating liner is subjected to friction force in the same direction as the movement direction when the outer ring of the roller rotates, and a cavity formed after the liner is tensioned and deformed is positioned at the rear of the movement direction, so that a liquid pollutant wedging effect cannot be generated, and the service life of the bearing is remarkably prolonged.
The two sides of the self-lubricating roller bearing are provided with the check rings perpendicular to the bearing surfaces of the inner ring and the outer ring of the bearing, and the check rings are fixedly connected to the end surfaces of the two sides of the inner ring of the bearing in a welding or press fitting mode, so that the inner ring and the outer ring of the bearing can be installed together on one hand, and the function of bearing axial load is achieved on the other hand. To reduce the number of independent components of the bearing, and to control the cost, U.S. Pat. nos. 4134842a and 4717268A provide a self-lubricating roller bearing structure in which one retainer ring is integrated with an inner ring, and after the inner ring and the outer ring are assembled, the other retainer ring is connected to the inner ring by welding or press fitting. Although the number of the bearing assemblies is reduced, the structure is provided with an independent check ring, the installation process is still complicated, and the axial bearing capacity of the bearing is limited to a certain extent by the welding or press fitting strength. In order to solve the above problems, US patent 5398294a proposes a method for manufacturing an integral self-lubricating roller bearing, which provides a bearing inner ring with a special structure, an outer ring is sleeved on the inner ring, inclined planes opposite to the end faces of the outer ring are formed at two ends of the inner ring by a forging forming method, so that the function of a retainer ring is achieved, and then a self-lubricating material is adhered to the cylindrical surface of the inner ring and the inclined planes, so that the self-lubricating roller bearing can be obtained. Although the method further reduces the number of bearing elements, reduces the manufacturing cost and improves the reliability of the bearing, the method also has some problems, such as the bearing outer ring has no axial extension section and no sealing ring, and pollutants easily enter the rollaway nest to cause abnormal abrasion of the self-lubricating liner; the bearing inner race both ends all need forging and pressing shaping in order to obtain the thrust inclined plane, and the shaping degree of difficulty is big and the structural variation of every inclined plane of independent control of difficulty in the shaping in-process easily causes both ends thrust inclined plane asymmetry, influences the life of bearing.
Disclosure of Invention
In view of the above, the invention aims to provide a self-lubricating roller bearing without an independent check ring, and a preparation method and application thereof. The self-lubricating roller bearing manufactured by the invention has compact structure, high reliability and long service life.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of an independent check ring-free self-lubricating roller bearing, which comprises a bearing outer ring, a bearing inner ring and a self-lubricating liner, and comprises the following steps:
a cylindrical inner hole rollway which is coaxial with the outer surface of the bearing outer ring and axially penetrates through the bearing outer ring is formed in the bearing outer ring, and a main sliding friction pair is formed by the bearing outer ring and the self-lubricating liner; the two ends of the bearing outer ring are provided with cylindrical dustproof holes coaxial with the axially-penetrated inner holes, and the cylindrical dustproof holes are in transitional connection with the axially-penetrated inner holes respectively through outer ring conical holes coaxial with the axially-penetrated inner holes;
one end of the bearing inner ring is provided with an outer conical surface matched with the outer ring conical hole, the other end of the bearing inner ring is provided with an inner ring rotary outer convex extension section complementary with the outer ring conical hole, the middle part of the outer surface of the bearing inner ring is an outer cylindrical surface, and the diameters of the outer cylindrical surface and the inner ring rotary outer convex extension section are smaller than the diameter of a cylindrical inner hole of the bearing outer ring so as to ensure that the bearing inner ring can be freely sleeved into the bearing outer ring;
sleeving the bearing outer ring on the bearing inner ring, stamping the inner ring rotary outer convex extension section to form an outer conical surface matched with the outer ring conical hole, and locking the bearing inner ring and the bearing outer ring;
and (3) pressing the cylindrical core rod into the axial through holes of the bearing inner ring in an interference manner, forming a self-lubricating material filling cavity by the outer conical surfaces and the outer cylindrical surfaces at the two ends of the bearing inner ring and the conical holes and the inner holes at the two ends of the bearing outer ring, injecting the self-lubricating material into the self-lubricating material filling cavity, obtaining the self-lubricating liner after the self-lubricating material is molded, bonding the self-lubricating liner on the outer cylindrical surfaces and the outer conical surfaces at the two ends of the bearing inner ring, removing the cylindrical core rod, and obtaining radial play to obtain the self-lubricating roller bearing without the independent retainer ring.
Preferably, the surface roughness of the outer conical surface, the outer cylindrical surface and the inner rotary outer convex extension section of the inner ring is Ra4.0-10.0 μm.
Preferably, the surface roughness of the surfaces of the inner hole of the bearing outer ring, the cylindrical dustproof hole and the conical hole of the outer ring is smaller than Ra0.2μm, and the surfaces are sprayed with fluorine-containing release agents.
Preferably, the spray thickness of the fluorine-containing release agent is independently 5 to 10 μm.
Preferably, the interference press fitting is performed to obtain a radial pre-expansion amount of 50-100 mu m for the bearing inner ring.
Preferably, the bearing outer ring is made of stainless steel or titanium alloy, the stainless steel is 9Cr18Mo or 0Cr13Ni8Mo2Al, and the titanium alloy is TC4 or TC6.
Preferably, the bearing inner ring is made of stainless steel or titanium alloy, the stainless steel is 05Cr17Ni4Cu4Nb, 06Cr17Ni12Mo2 or 06Cr19Ni9NbN, and the titanium alloy is TC4 or TC6.
Preferably, the self-lubricating liner is prepared by compounding, filling and modifying a matrix through chopped fibers and a solid lubricant, wherein the matrix is thermosetting resin or thermoplastic resin.
The invention also provides the self-lubricating roller bearing without the independent check ring, which is prepared by the preparation method of the technical scheme.
The invention also provides application of the self-lubricating roller bearing without the independent check ring in the field of aviation self-lubrication.
The invention provides a preparation method of an independent check ring-free self-lubricating roller bearing, which comprises a bearing outer ring, a bearing inner ring and a self-lubricating liner, and comprises the following steps: a cylindrical inner hole rollway which is coaxial with the outer surface of the bearing outer ring and axially penetrates through the bearing outer ring is formed in the bearing outer ring, and a main sliding friction pair is formed by the bearing outer ring and the self-lubricating liner; the two ends of the bearing outer ring are provided with cylindrical dustproof holes coaxial with the axially-penetrated inner holes, and the cylindrical dustproof holes are in transitional connection with the axially-penetrated inner holes respectively through outer ring conical holes coaxial with the axially-penetrated inner holes; one end of the bearing inner ring is provided with an outer conical surface matched with the outer ring conical hole, the other end of the bearing inner ring is provided with an inner ring rotary outer convex extension section complementary with the outer ring conical hole, the middle part of the outer surface of the bearing inner ring is an outer cylindrical surface, and the diameters of the outer cylindrical surface and the inner ring rotary outer convex extension section are smaller than the diameter of a cylindrical inner hole of the bearing outer ring so as to ensure that the bearing inner ring can be freely sleeved into the bearing outer ring; sleeving the bearing outer ring on the bearing inner ring, stamping the inner ring rotary outer convex extension section to form an outer conical surface matched with the outer ring conical hole, and locking the bearing inner ring and the bearing outer ring; and (3) pressing the cylindrical core rod into the axial through holes of the bearing inner ring in an interference manner, forming a self-lubricating material filling cavity by the outer conical surfaces and the outer cylindrical surfaces at the two ends of the bearing inner ring and the conical holes and the inner holes at the two ends of the bearing outer ring, injecting the self-lubricating material into the self-lubricating material filling cavity, obtaining the self-lubricating liner after the self-lubricating material is molded, bonding the self-lubricating liner on the outer cylindrical surfaces and the outer conical surfaces at the two ends of the bearing inner ring, removing the cylindrical core rod, and obtaining radial play to obtain the self-lubricating roller bearing without the independent retainer ring.
The self-lubricating gasket is formed by injecting self-lubricating materials into a cavity formed by the inner ring and the outer ring of the bearing at one time, is continuously adhered to the outer surface of the inner ring of the bearing, is an integral body, and overcomes the edge effect of reducing the bearing capacity of the gasket caused by more edges of the gasket due to the fact that the traditional gasket is formed on the end face and the cylindrical surface separately, so that the service life can be prolonged; the axial dustproof holes coaxial with the inner holes of the outer ring are arranged on the two sides of the outer ring of the bearing, so that pollutants can be effectively prevented from entering the rollaway nest to accelerate the abrasion of the self-lubricating liner, and the reliability and the service life of the bearing are further improved.
The structure of the self-lubricating roller bearing without the independent retainer ring is an improvement on the prior art, the double-side stamping forming of the inner ring of the self-lubricating roller bearing is changed into single-side stamping forming, the stamping forming difficulty is reduced, the forming precision is improved, the manufacturing efficiency is improved, and the bearing cost is reduced;
the radial clearance is obtained by adopting the method of pressing the cylindrical core rod into the through hole of the inner ring in an interference manner, the method is simple, and the clearance is convenient to regulate and control.
Drawings
FIG. 1 is a schematic view of a self-lubricating roller bearing according to the present invention;
FIG. 2 is an enlarged view of a portion of a self-lubricating roller bearing according to the present invention;
FIG. 3 is a schematic view of the self-lubricating roller bearing outer ring structure according to the present invention;
FIG. 4 is a schematic structural view of the self-lubricating roller bearing of the present invention before the inner ring is formed by stamping;
FIG. 5 is a schematic structural view of the self-lubricating roller bearing of the present invention after the inner ring is formed by stamping;
FIG. 6 is a schematic diagram of a self-lubricating material filling cavity of the self-lubricating roller bearing according to the present invention;
FIG. 7 shows the results of the friction coefficient test of the self-lubricating roller bearing prepared in example 1 of the present invention;
FIG. 8 is a graph showing the results of the friction coefficient test of the self-lubricating roller bearing prepared in example 2 of the present invention;
FIG. 9 is a graph showing the results of the friction coefficient test of the self-lubricating roller bearing prepared in example 3 of the present invention;
in the figure: 1-a bearing outer ring; 11-an inner hole cylindrical surface; 12-an inner conical surface I of the outer ring; 13-an outer ring inner conical surface II; 14-an outer ring dustproof hole I; 15-an outer ring dustproof hole II; 16-outer ring outer surface; 2-bearing inner rings; 21-an outer cylindrical surface of the inner ring; 22-an inner ring outer conical surface I; 23-an inner ring rotary outer convex extension section; 23' -an inner ring outer conical surface II; 24-an inner ring axial through hole; 3-filling the cavity with self-lubricating material; 4-self-lubricating liner.
Detailed Description
The invention provides a preparation method of an independent check ring-free self-lubricating roller bearing, which comprises a bearing outer ring, a bearing inner ring and a self-lubricating liner, and comprises the following steps:
a cylindrical inner hole rollway which is coaxial with the outer surface of the bearing outer ring and axially penetrates through the bearing outer ring is formed in the bearing outer ring, and a main sliding friction pair is formed by the bearing outer ring and the self-lubricating liner; the two ends of the bearing outer ring are provided with cylindrical dustproof holes coaxial with the axially-penetrated inner holes, and the cylindrical dustproof holes are in transitional connection with the axially-penetrated inner holes respectively through outer ring conical holes coaxial with the axially-penetrated inner holes;
one end of the bearing inner ring is provided with an outer conical surface matched with the outer ring conical hole, the other end of the bearing inner ring is provided with an inner ring rotary outer convex extension section complementary with the outer ring conical hole, the middle part of the outer surface of the bearing inner ring is an outer cylindrical surface, and the diameters of the outer cylindrical surface and the inner ring rotary outer convex extension section are smaller than the diameter of a cylindrical inner hole of the bearing outer ring so as to ensure that the bearing inner ring can be freely sleeved into the bearing outer ring;
sleeving the bearing outer ring on the bearing inner ring, stamping the inner ring rotary outer convex extension section to form an outer conical surface matched with the outer ring conical hole, and locking the bearing inner ring and the bearing outer ring;
and (3) pressing the cylindrical core rod into the axial through holes of the bearing inner ring in an interference manner, forming a self-lubricating material filling cavity by the outer conical surfaces and the outer cylindrical surfaces at the two ends of the bearing inner ring and the conical holes and the inner holes at the two ends of the bearing outer ring, injecting the self-lubricating material into the self-lubricating material filling cavity, obtaining the self-lubricating liner after the self-lubricating material is molded, bonding the self-lubricating liner on the outer cylindrical surfaces and the outer conical surfaces at the two ends of the bearing inner ring, removing the cylindrical core rod, and obtaining radial play to obtain the self-lubricating roller bearing without the independent retainer ring.
The following describes the content of the present invention with reference to the drawings.
FIG. 1 is a schematic view of a self-lubricating roller bearing according to the present invention, comprising a bearing outer race 1, a bearing inner race 2, and a self-lubricating liner 4; fig. 2 is an enlarged view of a portion of a self-lubricating roller bearing according to the present invention.
Fig. 3 is a schematic structural diagram of the self-lubricating roller bearing outer ring, wherein the bearing outer ring 1 comprises a cylindrical inner hole, the cylindrical inner hole forms an inner hole cylindrical surface 11, and the bearing outer ring further comprises an outer ring inner conical surface I12, an outer ring inner conical surface II13, a dustproof hole I14, a dustproof hole II 15 and an outer ring outer surface 16 which are coaxial; the inner conical surface I12 of the outer ring and the inner conical surface II13 of the outer ring respectively connect the dustproof hole I14 and the dustproof hole II 15 with a cylindrical inner hole, and the included angles between the dustproof hole I and the axis (the right direction in the drawing is the positive direction) of the outer ring 1 of the bearing are preferably 30-60 degrees and 120-150 degrees respectively, and more preferably 45 degrees and 135 degrees respectively; the surfaces of the inner hole cylindrical surface 11, the inner conical surface I12, the inner conical surface II13, the dustproof hole I14 and the dustproof hole II 15 of the outer ring are preferably ground, the surface roughness Ra is independently preferably smaller than 0.2 mu m, and the fluorine-containing release agent is sprayed.
In the present invention, the thickness of the fluorine-containing release agent to be sprayed is preferably 5 to 10. Mu.m.
In the present invention, the material of the bearing outer ring 1 is preferably stainless steel or titanium alloy, the stainless steel is preferably 9Cr18Mo or 0Cr13Ni8Mo2Al, and the titanium alloy is preferably TC4 or TC6.
Fig. 4 is a schematic view of the inner ring structure of the self-lubricating roller bearing, the left end of the inner ring outer conical surface i22 is provided with an inner ring outer conical surface i22 matched with the inner conical surface ii13 of the outer ring of the bearing outer ring 1, and the included angle between the inner ring outer conical surface i22 and the axis (the right direction in the figure is the positive direction) of the inner ring 2 of the bearing is preferably 120-150 degrees; the right end of the bearing inner ring 2 is provided with an inner ring rotary outer convex extension section 23 which is complementary with the inner conical hole of the outer ring, and the inner conical surface I12 of the outer ring is matched with the surface of the inner ring rotary outer convex extension section 23; the diameters of the inner ring outer cylindrical surface 21 and the inner ring rotary outer convex extension section 23 of the bearing inner ring 2 are slightly smaller than the diameter of the inner hole cylindrical surface 11 of the bearing outer ring 1; an inner ring axial through hole 24 is formed in the bearing inner ring 2; the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension 23 of the bearing inner ring 2 are preferably sandblasted so that the surface roughness thereof is independently preferably ra 4.0-10.0 μm to improve the binding force of the molded self-lubricating pad.
In the present invention, the material of the bearing inner ring 2 is preferably stainless steel or titanium alloy, the stainless steel is preferably 05Cr17Ni4Cu4Nb, 06Cr17Ni12Mo2 or 06Cr19Ni9NbN, and the titanium alloy is preferably TC4 or TC6.
In the invention, before the bearing outer ring 1 and the bearing inner ring 2 are punched and combined to form, the bearing outer ring 1 is preferably cleaned by acetone or ethanol in an ultrasonic mode, the cleaning time is preferably 20-30 min, the surfaces of the bearing outer ring are cleaned, and then fluorine-containing release agents are preferably sprayed on the surfaces of the inner hole cylindrical surface 11 of the outer ring, the inner conical surface I12 of the outer ring, the inner conical surface II13 of the outer ring, the dustproof hole I14 and the dustproof hole II 15, so that the solidified and formed molded self-lubricating liner is convenient to separate from the bearing outer ring and can rotate freely.
In the invention, before the bearing outer ring 1 and the bearing inner ring 2 are punched and combined to form, dilute hydrochloric acid is preferably used for corroding the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension section 23 of the bearing inner ring 2 which are subjected to sand blasting treatment, the treatment time is preferably 2-5 min, the surface activity of the bearing inner ring is improved, and then acetone or ethanol is preferably used for ultrasonically cleaning the bearing inner ring 2 to clean the surface of the bearing inner ring, so that the binding force, the bearing capacity and the wear-resisting life of the molded self-lubricating liner are further improved.
After the steps are completed, the bearing outer ring 1 is sleeved on the bearing inner ring 2, the right end inner ring rotary outer convex body extension section 23 of the bearing inner ring 2 is axially punched by a punching machine, the surface of the inner ring rotary outer convex body extension section 23 is close to the outer ring inner conical surface I12 of the bearing outer ring 1, an inner ring outer conical surface II23 'matched with the outer ring inner conical surface I12 is formed, and the included angle between the inner ring outer conical surface II23' and the axis (the right direction in the drawing is the positive direction) of the bearing inner ring 2 is preferably 30-60 degrees, more preferably 45 degrees. Meanwhile, the invention preferably reserves an axial gap of 0.65-0.95 mm and is used for molding self-lubricating materials on an inner ring outer conical surface I22 and an inner ring outer conical surface II23' of the bearing inner ring 2, as shown in figure 5.
According to the invention, a cylindrical core rod is pressed into an axial through hole 24 of a bearing inner ring 2 in an interference manner, the interference is preferably 0.10-0.20 mm, so that the bearing inner ring 2 obtains a radial pre-expansion amount of 50-100 mu m, then the bearing outer ring 1 and the bearing inner ring 2 with the interference core rod which are formed together by punching are placed into a molding self-lubricating liner injection molding mold, and a self-lubricating material filling cavity 3 is formed by an inner ring outer cylindrical surface 21, an inner ring outer conical surface I22 and an inner ring outer conical surface II23' of the bearing inner ring 2, an outer ring inner hole cylindrical surface 11, an outer ring inner conical surface I12 and an outer ring inner conical surface II13 of the bearing outer ring 1, as shown in fig. 6.
In the invention, after the self-lubricating material is injected into the filling cavity, the mandrel is preferably removed to obtain play, and the molded self-lubricating roller bearing is manufactured.
In the present invention, the self-lubricating liner 4 is preferably prepared by compounding, filling and modifying a matrix, preferably a thermosetting resin or a thermoplastic resin, with a solid lubricant for reducing the friction coefficient of the self-lubricating liner 4 and chopped fibers for improving the wear resistance and the load-bearing capacity of the self-lubricating liner 4.
In the present invention, the chopped fibers are preferably one or two of glass fibers, carbon fibers, aramid fibers and potassium titanate whiskers, and the length of the chopped fibers is preferably 40 to 100 μm, and the aspect ratio is preferably 5 to 40.
In the invention, the solid lubricant is preferably one or two of polytetrafluoroethylene, graphite, molybdenum disulfide and polyethylene wax micropowder; the average particle diameter of the solid lubricant is preferably 10 to 30 μm.
In the present invention, the mass percentage of the chopped fibers in the self-lubricating liner 4 is preferably 5 to 15%, and the mass percentage of the solid lubricant is preferably 10 to 20%.
In the present invention, the thermosetting resin is preferably one of epoxy resin, acrylic resin, polyimide, vinyl resin, and phenolic resin; when the matrix is preferably a thermosetting resin, the molding preferably comprises the steps of:
injecting the self-lubricating material into the self-lubricating material filling cavity 3 at a pressure of 10-15 MPa, then placing the roller bearing and the die into a baking oven, heating to 170+/-5 ℃ at a heating rate of 1 ℃/min, preserving heat for 720-1440 min, and naturally cooling to room temperature along with the baking oven to finish the molding of the self-lubricating material.
In the present invention, the thermoplastic resin is preferably one of polyimide, polyether ether ketone, polyamide and polyphenylene sulfide; when the matrix is preferably a thermoplastic resin, the molding preferably includes the steps of:
injecting the self-lubricating material into the self-lubricating material filling cavity 3 at a pressure of 50-60 MPa, and maintaining the pressure for 5-10 min at a pressure of 30-40 MPa to finish the molding of the self-lubricating material.
After the molding is finished, the self-lubricating liner 4 is adhered to an inner ring outer cylindrical surface 21, an inner ring outer conical surface I22 and an inner ring outer conical surface II23' of the bearing inner ring 2, a cylindrical core rod which is pressed into an axial through hole 24 of the bearing inner ring 2 in an interference mode is taken out, the bearing inner ring 2 is contracted in the radial direction, the self-lubricating liner 4 is separated from a cylindrical inner hole surface 11, an outer ring inner conical surface I12 and an outer ring inner conical surface II13 of the bearing outer ring 1, play is obtained between the bearing outer ring 1 and the bearing inner ring 2, and the self-lubricating roller bearing without the independent retainer ring is obtained through free rotation.
The invention also provides the self-lubricating roller bearing without the independent check ring, which is prepared by the preparation method of the technical scheme.
The invention also provides application of the self-lubricating roller bearing without the independent check ring in the field of aviation self-lubrication.
The specific mode of the application of the present invention is not particularly limited, and modes well known to those skilled in the art can be adopted.
In the present invention, the axial through hole 24 of the bearing inner race 2 is mounted on a shaft or other component that translates but does not rotate, and the outer race outer surface 16 of the bearing outer race 1 moves along and follows the track in the application.
For further explanation of the present invention, the self-lubricating roller bearing without independent retainer ring, its preparation method and application provided by the present invention will be described in detail with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The preparation method of the self-lubricating roller bearing without the independent check ring comprises the following steps of:
the bearing outer ring 1 comprises a cylindrical inner hole, wherein the cylindrical inner hole forms an outer ring inner hole cylindrical surface 11, and further comprises an outer ring inner conical surface I12, an outer ring inner conical surface II13, a dustproof hole I14, a dustproof hole II 15 and an outer ring outer spherical surface 16 which are coaxial; the inner conical surface I12 of the outer ring and the inner conical surface II13 of the outer ring respectively connect the dustproof hole I14 and the dustproof hole II 15 with a cylindrical inner hole, and the included angles between the dustproof hole I and the axis (the right direction in the figure is the positive direction) of the outer ring 1 of the bearing are 45 degrees and 135 degrees respectively; after the surfaces of the inner hole cylindrical surface 11, the inner conical surface I12, the inner conical surface II13, the dustproof hole I14 and the dustproof hole II 15 of the outer ring are ground, the surface roughness is Ra0.1μm, and the thickness of the fluorine-containing release agent is 5 μm; the material of the bearing outer ring 1 is 9Cr18Mo.
The left end of the bearing inner ring 2 is provided with an inner ring outer conical surface I22 matched with an outer ring inner conical surface II13 of the bearing outer ring 1, and the included angle between the inner ring outer conical surface I22 and the axis of the bearing inner ring 2 is 135 degrees; the right end of the bearing inner ring 2 is provided with an inner ring rotary outer convex extension section 23 which is complementary with the inner conical hole of the outer ring, and the inner conical surface I12 of the outer ring is matched with the surface of the inner ring rotary outer convex extension section 23; the diameters of the inner ring outer cylindrical surface 21 and the inner ring rotary outer convex extension section 23 of the bearing inner ring 2 are slightly smaller than the diameter of the outer ring inner hole cylindrical surface 11 of the bearing outer ring 1; an inner ring axial through hole 24 is formed in the bearing inner ring 2; the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension 23 of the bearing inner ring 2 are subjected to sand blasting treatment to ensure that the surface roughness of the inner ring is Ra4.0, and the material of the bearing inner ring 2 is 05Cr17Ni4Cu4Nb.
Before the bearing outer ring 1 and the bearing inner ring 2 are punched and combined to form, acetone is used for ultrasonic cleaning of the bearing outer ring for 20min, and then fluorine-containing release agents are sprayed on the surfaces of the inner hole cylindrical surface 11 of the outer ring, the inner conical surface I12 of the outer ring, the inner conical surface II13 of the outer ring, the dustproof hole I14 and the dustproof hole II 15.
Before the bearing outer ring 1 and the bearing inner ring 2 are punched and combined to form, the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension section 235min of the sandblasted bearing inner ring 2 are corroded by dilute hydrochloric acid, the surface activity of the inner ring is improved, and then the bearing inner ring 2 is cleaned by acetone in an ultrasonic mode;
after the steps are completed, the bearing outer ring 1 is sleeved on the bearing inner ring 2, the right end inner ring rotary outer convex body extension section 23 of the bearing inner ring 2 is axially punched by a punching machine, the surface of the inner ring rotary outer convex body extension section 23 is closed towards the outer ring inner conical surface I12 of the bearing outer ring 1, an inner ring outer conical surface II23 'matched with the outer ring inner conical surface I12 is formed, and an included angle between the inner ring outer conical surface II23' and the axis (the right direction in the drawing is positive direction) of the bearing inner ring 2 is 45 degrees. Meanwhile, the invention reserves an axial gap of 0.65mm and is used for molding self-lubricating materials on an inner ring outer conical surface I22 and an inner ring outer conical surface II23' of the bearing inner ring 2, as shown in figure 5.
The cylindrical core rod is pressed into the axial through hole 24 of the bearing inner ring 2 in an interference way, the interference is 0.10mm, the bearing inner ring 2 obtains radial pre-expansion, then the bearing outer ring 1 and the bearing inner ring 2 with the interference core rod which are formed together in a punching way are placed into a moulding type self-lubricating liner injection moulding mould, and the self-lubricating material filling cavity 3 is formed by the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, the outer ring inner hole cylindrical surface 11, the outer ring inner conical surface I12 and the outer ring inner conical surface II13 of the bearing outer ring 1, as shown in figure 6.
The self-lubricating liner 4 is prepared from thermosetting acrylic ester, chopped carbon fiber serving as a reinforcing agent and polytetrafluoroethylene serving as a solid lubricant, wherein the length of the chopped carbon fiber is 80 mu m, the length-diameter ratio is 10, the average particle size of the polytetrafluoroethylene is 10-30 mu m, the mass percent of the chopped carbon fiber in the self-lubricating material is 10%, the mass percent of the polytetrafluoroethylene is 15%, and the molding of the self-lubricating material comprises the following steps:
injecting the self-lubricating material into the self-lubricating material filling cavity 3 at the pressure of 10MPa, then placing the roller bearing and the die into a baking oven, heating to 170 ℃ at the heating rate of 1 ℃/min, preserving heat for 720min, and naturally cooling to room temperature along with the baking oven to finish the molding of the self-lubricating material.
After the molding is finished, the self-lubricating liner 4 is adhered to the outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, the cylindrical core rod which is pressed into the axial through hole 24 of the bearing inner ring 2 in an interference mode is taken out, the bearing inner ring 2 is contracted in the radial direction, the self-lubricating liner 4 is separated from the cylindrical inner hole surface 11, the outer ring inner conical surface I12 and the outer ring inner conical surface II13 of the bearing outer ring 1, play is obtained between the bearing outer ring 1 and the bearing inner ring 2, and the self-lubricating roller bearing without an independent check ring is obtained through free rotation.
Friction coefficient and wear life tests were performed under test conditions specified by the standard BPS-B-173: the test uses two rollers as a group, and after 10 ten-thousand runs, the average friction coefficient is 0.035, the test result is shown in figure 7, and the abrasion depth of the self-lubricating liner is 0.030mm.
Example 2
The preparation method of the self-lubricating roller bearing without the independent check ring comprises the following steps of:
the bearing outer ring 1 comprises a cylindrical inner hole, wherein the cylindrical inner hole forms an outer ring inner hole cylindrical surface 11, and further comprises an outer ring inner conical surface I12, an outer ring inner conical surface II13, a dustproof hole I14, a dustproof hole II 15 and an outer ring outer spherical surface 16 which are coaxial; the inner conical surface I12 of the outer ring and the inner conical surface II13 of the outer ring respectively connect the dustproof hole I14 and the dustproof hole II 15 with a cylindrical inner hole, and the included angles between the dustproof hole I and the axis (the right direction in the figure is the positive direction) of the outer ring 1 of the bearing are 45 degrees and 135 degrees respectively; after the surfaces of the inner hole cylindrical surface 11, the inner conical surface I12, the inner conical surface II13, the dustproof hole I14 and the dustproof hole II 15 of the outer ring are ground, the surface roughness is Ra0.2μm, and the thickness of the fluorine-containing release agent is 5 μm; the material of the bearing outer ring 1 is 0Cr13Ni8Mo2Al.
The left end of the bearing inner ring 2 is provided with an inner ring outer conical surface I22 matched with an outer ring inner conical surface II13 of the bearing outer ring 1, and the included angle between the inner ring outer conical surface I22 and the axis of the bearing inner ring 2 is 135 degrees; the right end of the bearing inner ring 2 is provided with an inner ring rotary outer convex extension section 23 which is complementary with the inner conical hole of the outer ring, and the inner conical surface I12 of the outer ring is matched with the surface of the inner ring rotary outer convex extension section 23; the diameters of the inner ring outer cylindrical surface 21 and the inner ring rotary outer convex extension section 23 of the bearing inner ring 2 are slightly smaller than the diameter of the outer ring inner hole cylindrical surface 11 of the bearing outer ring 1; an inner ring axial through hole 24 is formed in the bearing inner ring 2; the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension 23 of the bearing inner ring 2 are subjected to sand blasting treatment to ensure that the surface roughness of the inner ring is Ra7.0, and the material of the bearing inner ring 2 is 05Cr17Ni4Cu4Nb.
Before the bearing outer ring 1 and the bearing inner ring 2 are stamped and formed in a combined mode, acetone is used for ultrasonically cleaning the bearing outer ring for 25min, and then a fluorine-containing release agent is sprayed on the surfaces of the inner hole cylindrical surface 11 of the outer ring, the inner conical surface I12 of the outer ring, the inner conical surface II13 of the outer ring, the dustproof hole I14 and the dustproof hole II 15.
Before the bearing outer ring 1 and the bearing inner ring 2 are punched and combined to form, the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension section 233min of the sandblasted bearing inner ring 2 are corroded by dilute hydrochloric acid, the surface activity of the inner ring is improved, and then the bearing inner ring 2 is cleaned by acetone in an ultrasonic mode;
after the steps are completed, the bearing outer ring 1 is sleeved on the bearing inner ring 2, the right end inner ring rotary outer convex body extension section 23 of the bearing inner ring 2 is axially punched by a punching machine, the surface of the rotary outer convex body extension section 23 is close to the outer ring inner conical surface I12 of the bearing outer ring 1, an inner ring outer conical surface II23 'matched with the outer ring inner conical surface I12 is formed, and an included angle between the inner ring outer conical surface II23' and the axis (the right direction in the drawing is positive direction) of the bearing inner ring 2 is 45 degrees. Meanwhile, the invention reserves an axial gap of 0.76mm and is used for molding self-lubricating materials on the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, as shown in figure 5.
The cylindrical core rod is pressed into the axial through hole 24 of the bearing inner ring 2 in an interference way, the interference is 0.20mm, the bearing inner ring 2 obtains radial pre-expansion, then the bearing outer ring 1 and the bearing inner ring 2 with the interference core rod which are formed together in a punching way are placed into a moulding type self-lubricating liner injection moulding mould, and the self-lubricating material filling cavity 3 is formed by the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, the outer ring inner hole cylindrical surface 11, the outer ring inner conical surface I12 and the outer ring inner conical surface II13 of the bearing outer ring 1, as shown in figure 6.
The self-lubricating liner 4 is prepared from thermosetting vinyl resin, reinforcing agent chopped glass fibers and solid lubricant polytetrafluoroethylene, wherein the length of the chopped glass fibers is 70 mu m, the length-diameter ratio is 10, the average particle diameter of the polytetrafluoroethylene is 10-30 mu m, the mass percent of the chopped glass fibers in the self-lubricating material is 5%, the mass percent of the polytetrafluoroethylene is 20%, and the molding of the self-lubricating material comprises the following steps:
injecting the self-lubricating material into the cavity 3 with the pressure of 15MPa, then placing the roller bearing and the die into a baking oven together, heating to 165 ℃ at the heating rate of 1 ℃/min, preserving heat for 1200min, and naturally cooling to room temperature along with the baking oven to finish the molding of the self-lubricating material.
After the molding is finished, the self-lubricating liner 4 is adhered to the outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, the cylindrical core rod which is pressed into the axial through hole 24 of the bearing inner ring 2 in an interference mode is taken out, the bearing inner ring 2 is contracted in the radial direction, the self-lubricating liner 4 is separated from the cylindrical inner hole surface 11, the outer ring inner conical surface I12 and the outer ring inner conical surface II13 of the bearing outer ring 1, play is obtained between the bearing outer ring 1 and the bearing inner ring 2, and the self-lubricating roller bearing without an independent check ring is obtained through free rotation.
Friction coefficient and wear life tests were performed under test conditions specified by the standard BPS-B-173: the test uses two rollers as a group, and after 10 ten-thousand runs, the average friction coefficient is 0.040, and the test result is shown in figure 8, and the abrasion depth of the self-lubricating liner is 0.080mm.
Example 3
The preparation method of the self-lubricating roller bearing without the independent check ring comprises the following steps of:
the bearing outer ring 1 comprises a cylindrical inner hole, wherein the cylindrical inner hole forms an outer ring inner hole cylindrical surface 11, and further comprises an outer ring inner conical surface I12, an outer ring inner conical surface II13, a dustproof hole I14, a dustproof hole II 15 and an outer ring outer spherical surface 16 which are coaxial; the inner conical surface I12 of the outer ring and the inner conical surface II13 of the outer ring respectively connect the dustproof hole I14 and the dustproof hole II 15 with a cylindrical inner hole, and the included angles between the dustproof hole I and the axis (the right direction in the figure is the positive direction) of the outer ring 1 of the bearing are 45 degrees and 135 degrees respectively; after the surfaces of the inner hole cylindrical surface 11, the inner conical surface I12, the inner conical surface II13, the dustproof hole I14 and the dustproof hole II 15 of the outer ring are ground, the surface roughness is Ra0.2μm, and the thickness of the fluorine-containing release agent is 6 μm; the material of the bearing outer ring 1 is 9Cr18Mo.
The left end of the bearing inner ring 2 is provided with an inner ring outer conical surface I22 matched with an outer ring inner conical surface II13 of the bearing outer ring 1, and the included angle between the inner ring outer conical surface I22 and the axis of the bearing inner ring 2 is 135 degrees; the right end of the bearing inner ring 2 is provided with an inner ring rotary outer convex extension section 23 which is complementary with the inner conical hole of the outer ring, and the inner conical surface I12 of the outer ring is matched with the surface of the inner ring rotary outer convex extension section 23; the diameters of the inner ring outer cylindrical surface 21 and the inner ring rotary outer convex extension section 23 of the bearing inner ring 2 are slightly smaller than the diameter of the outer ring inner hole cylindrical surface 11 of the bearing outer ring 1; an inner ring axial through hole 24 is formed in the bearing inner ring 2; the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension 23 of the bearing inner ring 2 are subjected to sand blasting treatment to ensure that the surface roughness of the inner ring is Ra6.0, and the material of the bearing inner ring 2 is 05Cr17Ni4Cu4Nb.
Before the bearing outer ring 1 and the bearing inner ring 2 are stamped and formed in a combined mode, acetone is used for ultrasonically cleaning the bearing outer ring for 20min, and then a fluorine-containing release agent is sprayed on the surfaces of the inner hole cylindrical surface 11 of the outer ring, the inner conical surface I12 of the outer ring, the inner conical surface II13 of the outer ring, the dustproof hole I14 and the dustproof hole II 15.
Before the bearing outer ring 1 and the bearing inner ring 2 are punched and combined to form, the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring rotary outer convex extension section 234min of the sandblasted bearing inner ring 2 are corroded by dilute hydrochloric acid, the surface activity of the inner ring is improved, and then the bearing inner ring 2 is cleaned by acetone in an ultrasonic mode;
after the steps are completed, the bearing outer ring 1 is sleeved on the bearing inner ring 2, the right end inner ring rotary outer convex body extension section 23 of the bearing inner ring 2 is axially punched by a punching machine, the surface of the inner ring rotary outer convex body extension section 23 is closed towards the outer ring inner conical surface I12 of the bearing outer ring 1, an inner ring outer conical surface II23 'matched with the outer ring inner conical surface I12 is formed, and an included angle between the inner ring outer conical surface II23' and the axis (the right direction in the drawing is positive direction) of the bearing inner ring 2 is 45 degrees. Meanwhile, the invention reserves an axial gap of 0.50mm and is used for molding self-lubricating materials on an inner ring outer conical surface I22 and an inner ring outer conical surface II23' of the bearing inner ring 2, as shown in figure 5.
The cylindrical core rod is pressed into the axial through hole 24 of the bearing inner ring 2 in an interference way, the interference is 0.15mm, the bearing inner ring 2 obtains radial pre-expansion, then the bearing outer ring 1 and the bearing inner ring 2 with the interference core rod which are formed together in a punching way are placed into a moulding type self-lubricating liner injection moulding mould, and the self-lubricating material filling cavity 3 is formed by the inner ring outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, the outer ring inner hole cylindrical surface 11, the outer ring inner conical surface I12 and the outer ring inner conical surface II13 of the bearing outer ring 1, as shown in figure 6.
The self-lubricating liner 4 is prepared from thermoplastic polyether-ether-ketone resin, reinforcing agent chopped glass fibers and solid lubricant molybdenum disulfide, wherein the length of the chopped glass fibers is 70 mu m, the length-diameter ratio is 10, the average particle diameter of the molybdenum disulfide is 10-20 mu m, the mass percentage of the chopped glass fibers in the self-lubricating material is 10%, the mass percentage of the molybdenum disulfide is 15%, and the molding of the self-lubricating material comprises the following steps:
injecting the self-lubricating material into the self-lubricating material filling cavity 3 at a pressure of 60MPa, and maintaining the pressure for 5min at a pressure of 40MPa to finish the molding of the self-lubricating material.
After the molding is finished, the self-lubricating liner 4 is adhered to the outer cylindrical surface 21, the inner ring outer conical surface I22 and the inner ring outer conical surface II23' of the bearing inner ring 2, the cylindrical core rod which is pressed into the axial through hole 24 of the bearing inner ring 2 in an interference mode is taken out, the bearing inner ring 2 is contracted in the radial direction, the self-lubricating liner 4 is separated from the cylindrical inner hole surface 11, the outer ring inner conical surface I12 and the outer ring inner conical surface II13 of the bearing outer ring 1, play is obtained between the bearing outer ring 1 and the bearing inner ring 2, and the self-lubricating roller bearing without an independent check ring is obtained through free rotation.
Friction coefficient and wear life tests were performed under test conditions specified by the standard BPS-B-173: the test uses two rollers as a group, and after 10 ten-thousand runs, the average friction coefficient is 0.030, and the test result is shown in figure 9, and the abrasion depth of the self-lubricating liner is 0.120mm.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The preparation method of the self-lubricating roller bearing without the independent check ring comprises a bearing outer ring, a bearing inner ring and a self-lubricating liner, and is characterized by comprising the following steps of:
a cylindrical inner hole rollway which is coaxial with the outer surface of the bearing outer ring and axially penetrates through the bearing outer ring is formed in the bearing outer ring, and a main sliding friction pair is formed by the bearing outer ring and the self-lubricating liner; the two ends of the bearing outer ring are provided with cylindrical dustproof holes coaxial with the axially-penetrated inner holes, and the cylindrical dustproof holes are in transitional connection with the axially-penetrated inner holes respectively through outer ring conical holes coaxial with the axially-penetrated inner holes;
one end of the bearing inner ring is provided with an outer conical surface matched with the outer ring conical hole, the other end of the bearing inner ring is provided with an inner ring rotary outer convex extension section complementary with the outer ring conical hole, the middle part of the outer surface of the bearing inner ring is an outer cylindrical surface, and the diameters of the outer cylindrical surface and the inner ring rotary outer convex extension section are smaller than the diameter of a cylindrical inner hole of the bearing outer ring so as to ensure that the bearing inner ring can be freely sleeved into the bearing outer ring;
sleeving the bearing outer ring on the bearing inner ring, stamping the inner ring rotary outer convex extension section to form an outer conical surface matched with the outer ring conical hole, and locking the bearing inner ring and the bearing outer ring;
and (3) pressing the cylindrical core rod into the axial through holes of the bearing inner ring in an interference manner, forming a self-lubricating material filling cavity by the outer conical surfaces and the outer cylindrical surfaces at the two ends of the bearing inner ring and the conical holes and the inner holes at the two ends of the bearing outer ring, injecting the self-lubricating material into the self-lubricating material filling cavity, obtaining the self-lubricating liner after the self-lubricating material is molded, bonding the self-lubricating liner on the outer cylindrical surfaces and the outer conical surfaces at the two ends of the bearing inner ring, removing the cylindrical core rod, and obtaining radial play to obtain the self-lubricating roller bearing without the independent retainer ring.
2. The method according to claim 1, wherein the surface roughness of the inner ring outer conical surface, the outer cylindrical surface and the inner ring rotary outer convex extension is ra4.0 μm to 10.0 μm.
3. The preparation method according to claim 1 or 2, wherein the surface roughness of the inner hole of the bearing outer ring, the cylindrical dustproof hole and the conical hole of the outer ring is less than Ra0.2μm, and a fluorine-containing release agent is sprayed on the surface.
4. The method according to claim 3, wherein the spray thickness of the fluorine-containing releasing agent is independently 5 to 10. Mu.m.
5. The method according to claim 1, wherein the interference press-fitting is performed to obtain a radial pre-expansion of the bearing inner ring of 50-100 μm.
6. The method according to claim 1, wherein the bearing outer ring is made of stainless steel or titanium alloy, the stainless steel is 9Cr18Mo or 0Cr13Ni8Mo2Al, and the titanium alloy is TC4 or TC6.
7. The method according to claim 1, wherein the inner ring of the bearing is made of stainless steel or titanium alloy, the stainless steel is 05Cr17Ni4Cu4Nb, 06Cr17Ni12Mo2 or 06Cr19Ni9NbN, and the titanium alloy is TC4 or TC6.
8. The method according to claim 1, wherein the self-lubricating liner is prepared by compounding and filling modification of a matrix with chopped fibers and a solid lubricant, and the matrix is a thermosetting resin or a thermoplastic resin.
9. The self-lubricating roller bearing without independent retainer ring manufactured by the manufacturing method of any one of claims 1 to 8.
10. The use of the self-lubricating roller bearing without independent check ring of claim 9 in the field of aviation self-lubrication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310789455.5A CN116816806A (en) | 2023-06-30 | 2023-06-30 | Self-lubricating roller bearing without independent check ring and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310789455.5A CN116816806A (en) | 2023-06-30 | 2023-06-30 | Self-lubricating roller bearing without independent check ring and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116816806A true CN116816806A (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310789455.5A Pending CN116816806A (en) | 2023-06-30 | 2023-06-30 | Self-lubricating roller bearing without independent check ring and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116816806A (en) |
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2023
- 2023-06-30 CN CN202310789455.5A patent/CN116816806A/en active Pending
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