CN113464511A - Bimetal oil separating cover - Google Patents
Bimetal oil separating cover Download PDFInfo
- Publication number
- CN113464511A CN113464511A CN202110734505.0A CN202110734505A CN113464511A CN 113464511 A CN113464511 A CN 113464511A CN 202110734505 A CN202110734505 A CN 202110734505A CN 113464511 A CN113464511 A CN 113464511A
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- China
- Prior art keywords
- oil
- cover
- friction pair
- base body
- body part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000009826 distribution Methods 0.000 claims abstract description 61
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 230000013011 mating Effects 0.000 claims description 15
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000007769 metal material Substances 0.000 claims description 10
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 2
- 238000000926 separation method Methods 0.000 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention provides a bimetal oil separating cover, which comprises a oil separating cover base body part and a friction pair matching part, wherein the friction pair matching part is used for matching and connecting with a rotor friction pair, and the friction pair matching part is fixedly connected with the oil separating cover base body part; the oil distribution cover base body part is made of alloy materials. The hydraulic pump has the advantages of light weight, high strength, good economy and the like, can be suitable for high-pressure use occasions, and improves the comprehensive efficiency of the hydraulic pump.
Description
Technical Field
The disclosure relates to the field of oil distribution covers, in particular to a bimetal oil distribution cover.
Background
The hydraulic pump and the hydraulic motor are respectively used as a power element and an actuating element of a hydraulic system, and play an important role in the hydraulic system. The oil distribution cover is one of essential components in a hydraulic motor and a hydraulic pump, is not only in butt joint with an interface of a hydraulic system user, but also in oil absorption and oil discharge functions in oil distribution inside the hydraulic pump and the hydraulic motor, and more importantly, is a main high-pressure stressed part in the hydraulic pump and the hydraulic motor, so that the oil distribution cover is required to have high strength and rigidity on one hand, and the oil distribution cover is required to have good wear resistance on the other hand, and forms friction pair material pairing with a rotor; at present, the oil distribution cover is generally made of a nitrided steel material, and meets the requirements of strength and friction pair material pairing, but the steel material has high density and heavy weight under the same volume.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
In order to solve at least one of the above-mentioned technical problem, this disclosure provides a bimetal divides oil cover, and concrete implementation:
a bimetal oil cover comprises an oil cover base body part and a friction pair matching part used for being matched and connected with a rotor friction pair, wherein the friction pair matching part is fixedly connected with the oil cover base body part; the oil distribution cover base body part is made of alloy materials.
In one embodiment, the friction pair mating part is made of a high-strength wear-resistant metal material.
In one embodiment, the alloy material is a titanium alloy material.
In one embodiment, the friction pair mating part and the partial oil cover base body part are joined by hot isostatic pressure diffusion welding.
In one embodiment, the oil cap base portion includes a boss portion for connection with the housing; the friction pair mating part is connected to the table surface of the boss part.
In one embodiment, the high-strength wear-resistant metal material is a steel nitride material.
In one embodiment, the outer peripheral wall of the boss portion is provided with a groove extending along a circumferential direction thereof, and a sealing ring is embedded in the groove.
In one embodiment, the boss portion is circular in cross-section.
In one embodiment, the oil separating cover is provided with a high-pressure window, a low-pressure window, an oil inlet and an oil outlet; the oil inlet and the oil outlet are arranged on the oil separating cover machine body part; the high-pressure window penetrates through the friction pair matching part and penetrates through the part of the oil cover base body part to be communicated with the oil outlet; the low-pressure window penetrates through the friction pair matching part and penetrates through the part of the oil cover base body part to be communicated with the oil inlet.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a schematic structural view of a bimetallic oil distribution cap of the present disclosure;
FIG. 2 is a schematic view of the assembly of the oil distributing cover and the shell of the steel integral structure;
FIG. 3 is a schematic view of the assembly of the oil distributing cover and the housing in a split structure;
FIG. 4 is a schematic view of the assembly of the bimetallic oil-separating cover and the housing;
in the figure:
an oil distributing cover 1; a housing 2; a rotor 3; a seal ring 4; a positioning pin 5; a high voltage window 6; a low-pressure window 7; an oil inlet 8; an oil outlet 9; an oil separation cap base portion 11; a friction pair mating part 12; a boss portion 111; a recess 112; an oil distribution cover main body 101; an oil distribution pan 102.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
At present, the oil distribution cover generally comprises an oil distribution cover with an integral structure and an oil distribution cover with a split structure.
Fig. 2 shows a schematic assembly diagram of the oil distributing cover and the housing, which are made of steel and have an integral structure, and are generally made of nitrided steel material to meet the requirements of strength and friction pair pairing.
Referring to fig. 2, when the oil distribution cover adopting the steel integral structure is assembled, the oil distribution cover 1 and the shell 2 are fastened and installed by screws, the rotor 3 in the shell is in contact with the oil distribution cover 1 to form friction pairs, the oil distribution cover and the shell are sealed by the sealing ring 4 to prevent oil in the hydraulic pump cavity from leaking, and the oil distribution cover adopting the steel integral structure can be directly paired with the rotor to form friction pairs.
Fig. 3 shows the assembly schematic diagram of the oil distribution cover and the shell of the split structure, the oil distribution cover of the split structure generally adopts the mode of adding the oil distribution cover main body 101 to the oil distribution plate 102, the oil distribution plate 102 is processed by utilizing nitrided steel, the requirement of friction pair pairing is met, the oil distribution cover main body 101 is made by utilizing aluminum metal materials, the weight of the oil distribution cover is reduced, the oil distribution plate 102 is fixed on the oil distribution cover main body 101 in a bolt mode and the like, the oil distribution cover can meet the requirements of light weight and friction pair pairing simultaneously, but the strength is insufficient, the high-pressure use working condition cannot be met, and the problems of internal leakage and the like are easily generated.
Referring to fig. 3, when the oil distribution cover with the split structure is assembled, the oil distribution cover main body 101 and the housing 2 are fastened and installed by screws, the oil distribution cover 1 and the housing 2 are sealed by the sealing ring 4, leakage of oil in the hydraulic pump cavity is prevented, an oil distribution disc 102 needs to be additionally arranged between the oil distribution cover main body 101 and the rotor 3, the oil distribution disc 102 and the rotor 3 form a friction pair to be paired, and the oil distribution disc 102 and the oil distribution cover main body 101 need to be positioned by the positioning pin 5.
Referring to fig. 1, as an embodiment, the present embodiment provides a bimetal oil cover, including a oil cover base body portion 11 and a friction pair mating portion 12 for mating connection with a rotor friction pair, where the friction pair mating portion 12 is fixedly connected to the oil cover base body portion 11; the partial oil cover base body portion 11 is made of an alloy material, and the friction pair counterpart 12 is made of a high-strength wear-resistant metal material. The alloy material used for manufacturing the oil distribution cover base body part 11 has the characteristics of high hardness and low weight, and titanium alloy, aluminum alloy and other alloy materials are selected to have higher strength-weight ratio, so that the requirement of high-pressure stress of the oil distribution cover can be met; the material used for manufacturing the friction pair mating part should be a high-strength wear-resistant metal material, such as nitrided steel, to meet the requirements for friction pair mating. In a preferred embodiment, the friction pair mating part 12 and the partial oil cover base body part 11 are connected by hot isostatic pressing diffusion welding so that the friction pair mating part 12 and the partial oil cover base body part 11 can be integrally joined.
Referring to fig. 1, the bimetal of this embodiment divides oil cap structure can enough solve the intensity problem of dividing the oil cap under the unchangeable condition of original oil cap size of branch, has satisfied the vice paired high strength of friction and wearability's demand again, simultaneously still greatly reduced divide the weight of oil cap, can also give the interior scheduling problem of revealing that the split type structure of wall brought.
Referring to fig. 1, in the bimetal oil separation cover structure of the present embodiment, when the oil separation cover base body 11 is made of a titanium alloy, the tensile strength of the oil separation cover base body 11 made of the titanium alloy material is substantially close to that of the steel material, but the density of the oil separation cover base body 11 made of the titanium alloy material is only 1/2 of the steel material, so that compared with the oil separation cover with the steel integral structure, the oil separation cover of the present embodiment has a higher strength-to-weight ratio after the oil separation cover base body 11 is made of the titanium alloy material, the strength-to-weight ratio is almost 2 times of the strength-to-weight ratio of the steel material, and the weight of the bimetal oil separation cover of the present embodiment is reduced by 50% compared with the oil separation cover with the integral structure under the same tensile strength.
In addition, since the tensile strength of the titanium alloy is 3 to 4 times that of the aluminum metal material, and the density is only about 1.6 times that of the aluminum metal material, compared with the oil separation cover made of the aluminum metal material, the oil separation cover of the present embodiment using the titanium alloy material as the base portion 11 of the oil separation cover has a higher strength-to-weight ratio, which is almost 2.5 times that of the aluminum alloy; therefore, the titanium alloy material is adopted as the base body part 11 of the oil separating cover, compared with the oil separating cover made of aluminum metal, when the weight of the oil separating cover is increased by 50%, the tensile strength of the oil separating cover can be improved by 2-3 times, the working pressure level of the hydraulic pump can be improved, the current 21MPa is improved to 28MPa, 35MPa or even higher level, the pressure of the hydraulic system is improved, the diameter of the actuating cylinder of the hydraulic system can be greatly reduced, and the weight of the whole system is reduced.
Compared with the oil distribution cover with the split structure shown in fig. 3, the bimetal oil distribution cover shown in fig. 1 adopts the oil distribution cover base body part 11 made of titanium alloy material, so that the axial length of the hydraulic pump can be shortened, the oil distribution disc 102 and the positioning pin 5 are not needed, the number of hydraulic pump assembly parts is reduced, the assembly difficulty and the workload are reduced, and the adverse effect of the quality of processing and assembly on the performance of the hydraulic pump is avoided. In addition, the oil distribution disc 102 is generally thin, after nitriding treatment, two working faces of the oil distribution disc 102 deform to a certain extent, and internal leakage can be generated between the working faces of the oil distribution cover main body 101 and the oil distribution disc 102 during working.
Referring to fig. 1 and 4, as a preferred embodiment of the present example, the oil cap base body portion 11 includes a boss portion 111, the boss portion 111 being for connection with the housing 2; the friction pair counterpart 12 is attached to the top surface of the boss portion 111. The boss portion 111 has a circular cross-section. So as to facilitate the installation and positioning of the oil distributing cover 1 and the shell 2.
Referring to fig. 1 and 4, in one embodiment, the peripheral wall of the boss 111 is provided with a groove 112 extending along the circumferential direction thereof, and the groove 112 is embedded with the sealing ring 4.
The oil distribution cover is provided with a high-pressure window 6, a low-pressure window 7, an oil inlet 8 and an oil outlet 9; the oil inlet 8 and the oil outlet 9 are arranged on the oil separating cover machine body part 1; the high-pressure window 6 penetrates through the friction pair matching part 2 and penetrates through the partial oil cover base body part 1 to be communicated with the oil outlet 9; the low-pressure window 7 penetrates through the friction pair mating part 2 and penetrates through the partial oil cover base body part 1 to be communicated with the oil inlet 8. The high-pressure window 6 and the low-pressure window 7 are used for oil distribution of an oil suction area and an oil discharge area when the rotor works, and the oil inlet 8 and the oil outlet 9 are used for connecting the hydraulic pump with a system high-pressure oil path and a system low-pressure oil path.
Referring to fig. 4, the oil distribution cover 1 of the bimetal oil distribution cover is fastened and installed with the shell 2 by screws, the oil distribution cover 1 is sealed with the shell 2 by the sealing ring 4, leakage of oil in the hydraulic pump cavity is prevented, and the oil distribution cover 1 directly forms a friction pair with the rotor 3.
The heavy problem of the weight that the integral type branch oil cap of nitriding steel processing existed can be solved to the bimetal branch oil cap of this embodiment, and the intensity that also exists in the split type oil cap of dividing of wall aluminium is low to and split type produced interior problem of revealing and axial length is longer, and the hydraulic pump that uses the bimetal branch oil cap of this embodiment can be applicable to the high pressure use occasion, improves hydraulic pump comprehensive efficiency, has advantages such as intensity height, light in weight, economic nature are good.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (9)
1. The bimetal partial oil cover is characterized by comprising a partial oil cover base body part and a friction pair matching part used for being matched and connected with a rotor friction pair, wherein the friction pair matching part is fixedly connected with the partial oil cover base body part; the oil distribution cover base body part is made of alloy materials.
2. The oil pan cover of claim 1, wherein the friction pair mating part is made of a high-strength wear-resistant metal material.
3. The oil distribution cover of claim 1, wherein the alloy material is a titanium alloy material.
4. The partial oil cover of claim 1, wherein the friction pair mating portion is joined to the partial oil cover base portion by hot isostatic pressure diffusion welding.
5. The oil cap of claim 1, wherein the oil cap base portion includes a boss portion for attachment to the housing; the friction pair mating part is connected to the table surface of the boss part.
6. The oil distribution cover according to claim 2, wherein the high-strength wear-resistant metal material is a steel nitride material.
7. The oil distribution cover according to claim 5, wherein the outer peripheral wall of the boss portion is provided with a groove extending along a circumferential direction thereof, and a seal ring is fitted in the groove.
8. The oil distribution cover according to claim 5, wherein the boss portion has a circular cross section.
9. The oil distribution cover according to any one of claims 1 to 8, wherein a high pressure window, a low pressure window, an oil inlet and an oil outlet are provided on the oil distribution cover; the oil inlet and the oil outlet are arranged on the oil separating cover machine body part; the high-pressure window penetrates through the friction pair matching part and penetrates through the part of the oil cover base body part to be communicated with the oil outlet; the low-pressure window penetrates through the friction pair matching part and penetrates through the part of the oil cover base body part to be communicated with the oil inlet.
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CN202110734505.0A CN113464511B (en) | 2021-06-30 | 2021-06-30 | Bimetal oil distributing cover |
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CN202110734505.0A CN113464511B (en) | 2021-06-30 | 2021-06-30 | Bimetal oil distributing cover |
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CN113464511B CN113464511B (en) | 2024-06-11 |
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