CN113958513A

CN113958513A - High-sealing screw pump motor

Info

Publication number: CN113958513A
Application number: CN202111079981.XA
Authority: CN
Inventors: 王华昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-01-21

Abstract

The invention belongs to the technical field of screw pumps, in particular to a high-sealing screw pump motor, and provides a scheme for solving the problem of weakening sealing performance caused by overlarge meshing gap between screws. When the invention is used, the transmission rod rotates at a high speed to drive the helical blade to rotate, and the additional sealing strip which is connected to the edge of the surface of the helical blade in a sliding way is tightly attached to the pipe wall of the wear-resistant pipe under the centrifugal effect, thereby improving the sealing effect.

Description

High-sealing screw pump motor

Technical Field

The invention relates to the technical field of screw pumps, in particular to a high-sealing screw pump motor.

Background

The screw pump is formed by a pump body and a screw, when the screw rotates, the screw drives a helical blade on the outer wall of the screw to rotate together, the space volume of the screw at one end of the suction cavity is gradually increased, and the pressure is reduced; the liquid enters the space of the suction cavity under the action of pressure difference; when the volume is increased to the maximum to form a sealed cavity, the liquid continuously moves axially in the sealed cavities until reaching one end of the discharge cavity; at this time, the volume of the screw engagement space at one end of the discharge chamber is gradually reduced to discharge the liquid.

At present, gear pump and AY type centrifugal oil pump are widely used in the process of conveying lubricating oil in traditional steam turbine, because the performance of the gear pump and AY type centrifugal oil pump is limited, the gear pump and AY type centrifugal oil pump are not generally used, but the meshing between the helical blade of the screw pump and the inner wall of the pump body has tolerance clearance or the clearance between the output shaft and the position of the pump body is too large, or eccentricity is generated after rotating for a period of time, and the gear pump and AY type centrifugal oil pump are hidden troubles which affect the sealing effect.

Disclosure of Invention

The invention provides a high-sealing screw pump motor, aiming at solving the problem that the sealing performance is weakened due to overlarge clearance between a helical blade and a pump shell caused by long-term rotation of a screw in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a high-sealing screw pump motor comprises a pump body shell fixed on a base, wherein the pump body shell is of a cylindrical structure with a cavity arranged inside, a driving motor is fixed at the end part of the pump body shell on the upper surface of the base, a shaft coupling is fixed at the top end of an output shaft of the driving motor, a transmission rod is fixed on the driving motor through the shaft coupling, a spiral blade is fixed inside the pump body shell on the circumferential outer wall of the transmission rod, a mounting groove is formed in the middle of the circumferential outer wall of the spiral blade, a rubber strip is clamped in the mounting groove, a wear-resistant pipe is fixed on the circumferential inner wall of the pump body shell, a liquid inlet pipe is arranged at one end, away from the driving motor, of the pump body shell, a liquid outlet is arranged at one end, close to the driving motor, of the circumferential outer wall of the pump body shell, so that when liquid needs to be pumped, only one end of the liquid inlet pipe is connected into a target medium, and then the driving motor is started again to discharge the target liquid from the liquid outlet, and when the helical blade inside the pump body shell rotates, the helical blade can be tightly attached to the inner wall of the wear-resistant pipe, so that the abrasion is reduced, and the sealing performance is improved.

As the preferable scheme in the invention, the rubber strip is made of rubber material with good wear-resistant material, so that when the pump body is used, not only can a gap generated in assembly be made up, but also the inner wall of the pump body shell can be cleaned and scraped in time, and the effect of cleaning while working is achieved.

As a preferable scheme in the invention, the inner wall of the wear-resistant pipe is subjected to polishing and then is subjected to smooth treatment, so that the inner wall of the wear-resistant pipe is ensured to be in close contact with the circumferential outer wall of the helical blade, and the tolerance difference of the gap is reduced.

As the preferable scheme in the invention, a plurality of scraping strips arranged centripetally are fixed on one side of the spiral blade close to the liquid inlet pipe, so that the propelling effect on liquid can be enhanced.

According to the preferable scheme, the plurality of fixed round rods are fixed at one end, close to the pipe orifice of the liquid inlet pipe, of the inner wall of the pump body shell, the same limiting plate is fixed at one end, far away from the liquid inlet pipe, of each fixed round rod, and the rotating hole matched with the diameter of the transmission rod is formed in the middle of each limiting plate, so that the shaft axes of the transmission rods are always kept on the same straight line when the transmission rods rotate, and the possibility of swinging of the transmission rods during transmission is reduced.

As a preferable scheme in the invention, a stepped through hole is formed in the inner wall of one end, close to the driving motor, of the pump body shell, and a sealing ring is clamped in the stepped through hole.

According to the preferred scheme of the invention, a self-locking nut is fixed on the outer wall of one end, close to the edge, of the pump body shell, close to the driving motor, a U-shaped pressure rod is fixed at the end part of the self-locking nut through a fastening bolt, a bidirectional sealing ring is arranged between the end part of the pump body shell and the U-shaped pressure rod, the bidirectional sealing ring can provide radial and axial bidirectional sealing performance, and the leakage-free effect can be realized at the junction of the transmission rod and the pump body shell by matching with the arrangement of the U-shaped pressure rod.

As a preferable scheme in the invention, a sliding groove is formed in the surface of the spiral blade close to the circumferential edge, a compression spring is fixed at one end of the inner wall of the sliding groove close to the transmission rod, a sliding block is fixed at the other end of the compression spring, and the same additional moving sealing strip in a spiral structure is fixed at one end of each sliding block far away from the bottom of the groove.

As the preferable scheme in the invention, one side of the movable additional sealing strip, which is close to the inner wall of the wear-resistant pipe, is arranged to be a smooth surface, so that when the wear-resistant pipe is used, when the transmission rod rotates at a high speed, the spiral blade is driven to rotate, the additional sealing strip which is connected to the surface edge of the spiral blade in a sliding mode clings to the pipe wall of the wear-resistant pipe under the centrifugal effect, and the sealing effect is improved.

To sum up, the beneficial effect in this scheme is:

1. according to the high-sealing screw pump motor, the helical blade which is smooth in circumferential outer wall and is in close contact with the inner wall of the pump body shell is arranged, so that when liquid needs to be pumped in use, only one end of the liquid inlet pipe is connected into a target medium, then the driving motor is started, the target liquid can be discharged from the liquid outlet, and when the helical blade in the pump body shell rotates, the helical blade can be tightly attached to the inner wall of the wear-resistant pipe, so that the abrasion is reduced, and the sealing performance is improved;

2. according to the high-sealing screw pump motor, the rubber strips arranged at the circumferential edges of the helical blades can be used for not only compensating gaps generated during assembly, but also well cleaning and scraping the inner wall of the pump body shell in time, so that the effects of cleaning while working are achieved;

3. this kind of high sealed screw pump motor through setting up the additional seal strip of paper used for sealing of sliding connection in helical blade edge department, can drive helical blade when the transfer line high-speed rotation also rotates, and the pipe wall of wear-resisting pipe is hugged closely under centrifugal effect to the additional seal strip of paper used for sealing of sliding connection in helical blade surface edge, improves sealed effect.

Drawings

FIG. 1 is a schematic view of the overall structure of a high-sealing screw pump motor according to the present invention;

FIG. 2 is a schematic cross-sectional view of a high-sealing screw pump motor according to the present invention;

FIG. 3 is a schematic sectional view of a pump body housing of a high-sealing screw pump motor according to the present invention;

FIG. 4 is a schematic perspective view of a screw blade of a high-sealing screw pump according to a second embodiment of the present invention;

fig. 5 is a schematic half-sectional perspective view of a helical blade of a high-sealing screw pump motor according to a second embodiment of the present invention.

In the figure: the pump comprises a base 1, a wear-resistant pipe 2, a pump body shell 3, a helical blade 4, a sealing ring 5, a stepped through hole 6, a bidirectional sealing ring 7, a coupler 8, a driving motor 9, a fastening bolt 10, a U-shaped pressure lever 11, a self-locking nut 12, a liquid outlet 13, a transmission rod 14, a limiting plate 15, a fixed round rod 1501, a liquid inlet pipe 16, a scraping strip 17, a rubber strip 18, a movable additional sealing strip 19, a sliding groove 20 and a compression spring 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-3, a high-sealing screw pump motor comprises a pump body housing 3 fixed on a base 1, the pump body housing 3 is a cylindrical structure with a cavity inside, a driving motor 9 is fixed on the end portion of the pump body housing 3 on the upper surface of the base 1, a coupling 8 is fixed on the top end of an output shaft of the driving motor 9, a transmission rod 14 is fixed on the driving motor 9 through the coupling 8, a helical blade 4 is fixed on the circumferential outer wall of the transmission rod 14 inside the pump body housing 3, a mounting groove is opened in the middle of the circumferential outer wall of the helical blade 4, a rubber strip 18 is clamped in the mounting groove, a wear-resistant pipe 2 is fixed on the circumferential inner wall of the pump body housing 3, a liquid inlet pipe 16 is arranged at one end of the pump body housing 3 far from the driving motor 9, and a liquid outlet 13 is arranged at one end of the circumferential outer wall of the pump body housing 3 close to the driving motor 9, so that when the pump is needed, only need insert into target medium with feed liquor pipe 16 one end, later restart driving motor 9 can be followed the discharge of target liquid from liquid outlet 13 to when the inside helical blade 4 of pump body shell 3 when rotating, can closely laminate on the inner wall of wear-resisting pipe 2, reduce wearing and tearing and improve sealing performance.

In the invention, the rubber strip 18 is made of rubber material with good wear-resisting material, so that when in use, the gap generated in assembly can be compensated, and the inner wall of the pump body shell 3 can be cleaned and scraped in time, thereby achieving the effect of cleaning while working.

Wherein, the inner wall of the wear-resistant pipe 2 is subjected to polishing and then is subjected to smoothing treatment, so that the inner wall of the wear-resistant pipe 2 is ensured to be in close contact with the circumferential outer wall of the helical blade 4, and the tolerance difference of the gap is reduced.

Wherein, one side of the helical blade 4 close to the liquid inlet pipe 16 is fixed with a plurality of scraping strips 17 which are arranged centripetally, thereby increasing the propelling effect to the liquid.

Wherein, the one end that the inner wall of pump body shell 3 is close to the mouth of pipe department of feed liquor pipe 16 is fixed with a plurality of fixed round bars 1501, and the one end that fixed round bar 1501 is kept away from feed liquor pipe 16 is fixed with same limiting plate 15, and open the centre of limiting plate 15 has the commentaries on classics hole of mutually supporting with transfer line 14 diameter, ensures that the axial lead is in same straight line all the time when transfer line 14 rotates, has reduced the wobbling possibility of transfer line 14 when the transmission.

Wherein, the pump body shell 3 is provided with a step through hole 6 near the inner wall of one end of the driving motor 9, and the step through hole 6 is connected with a sealing ring 5 in a clamping way.

Wherein, the one end outer wall that pump body shell 3 is close to driving motor 9 is close to the edge and is fixed with self-locking nut 12, and the tip of self-locking nut 12 is fixed with U-shaped depression bar 11 through fastening bolt 10, is provided with two-way sealing washer 7 between the tip of pump body shell 3 and the U-shaped depression bar 11, and two-way sealing washer 7 can provide radial and axial two-way sealing performance, and the setting of cooperation U-shaped depression bar 11 can be to drive lever 14 and pump body shell 3's juncture realization exempt from the seepage effect.

The working principle is as follows: when the pump liquid is needed to be pumped in use, one end of the liquid inlet pipe is connected into a target medium, then the driving motor is started again, the target liquid can be discharged from the liquid outlet, and when the helical blade inside the pump body shell rotates, the helical blade can be tightly attached to the inner wall of the wear-resistant pipe, so that the abrasion is reduced, and the sealing performance is improved.

Example 2

Referring to fig. 4-5, in this embodiment, compared with embodiment 1, the high-sealing screw pump motor further includes a sliding groove 20 formed at a peripheral edge of the surface of the spiral blade 4, a compression spring 21 is fixed at one end of the inner wall of the sliding groove 20 close to the transmission rod 14, a sliding block is fixed at the other end of the compression spring 21, and a moving additional sealing strip 19 in a spiral structure is fixed at one end of each of the sliding blocks away from the bottom of the groove.

Wherein, remove the one side that additional sealing strip 19 is close to wear-resisting pipe 2 inner wall and set to the smooth surface to can drive helical blade 4 when the high-speed rotation of transfer line 14 when using and also rotate, the additional sealing strip 19 of sliding connection at helical blade 4 surface edge hugs closely the pipe wall of wear-resisting pipe 2 under centrifugal effect, improves sealed effect.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.

Claims

1. A high-sealing screw pump motor comprises a pump body shell (3) fixed on a base (1), wherein the pump body shell (3) is of a cylindrical structure with a cavity arranged inside, and is characterized in that a driving motor (9) is fixed at the end part of the upper surface of the base (1) positioned on the pump body shell (3), a coupler (8) is fixed at the top end of an output shaft of the driving motor (9), a transmission rod (14) is fixed on the driving motor (9) through the coupler (8), a spiral blade (4) is fixed at the inner part of the pump body shell (3) on the circumferential outer wall of the transmission rod (14), a mounting groove is formed in the middle of the circumferential outer wall of the spiral blade (4), a rubber strip (18) is clamped in the mounting groove, a wear-resistant pipe (2) is fixed on the circumferential inner wall of the pump body shell (3), and a liquid inlet pipe (16) is arranged at one end, far away from the driving motor (9), of the pump body shell (3), and a liquid outlet (13) is arranged at one end of the circumferential outer wall of the pump body shell (3) close to the driving motor (9).

2. A screw pump motor according to claim 1, wherein the rubber strip (18) is made of a rubber material with good wear resistance.

3. A screw pump motor with high sealing according to claim 1, wherein the inner wall of the wear tube (2) is smooth after polishing.

4. A high-sealing screw pump motor according to claim 1, characterized in that a plurality of centripetally arranged scraping strips (17) are fixed on one side of the helical blade (4) close to the liquid inlet pipe (16).

5. The screw pump motor with high sealing performance as claimed in claim 1, wherein a plurality of fixed round rods (1501) are fixed at one end of the inner wall of the pump body shell (3) close to the pipe orifice of the liquid inlet pipe (16), one end of each fixed round rod (1501) far away from the liquid inlet pipe (16) is fixed with the same limiting plate (15), and a rotary hole matched with the diameter of the transmission rod (14) is formed in the middle of each limiting plate (15).

6. A high-sealing screw pump motor according to claim 5, characterized in that the inner wall of the pump body housing (3) near the end of the drive motor (9) is provided with a stepped through hole (6), and the stepped through hole (6) is clamped with the sealing ring (5).

7. A high-sealing screw pump motor according to claim 6, characterized in that a self-locking nut (12) is fixed on the outer wall of one end of the pump body housing (3) close to the driving motor (9) close to the edge, a U-shaped pressure rod (11) is fixed on the end of the self-locking nut (12) through a fastening bolt (10), and a bidirectional sealing ring (7) is arranged between the end of the pump body housing (3) and the U-shaped pressure rod (11).

8. A screw pump motor with high sealing performance according to claim 1, characterized in that the surface of the helical blade (4) near the circumferential edge is provided with a chute (20), and one end of the inner wall of the chute (20) near the transmission rod (14) is fixed with a compression spring (21), the other end of the compression spring (21) is fixed with a sliding block, and one end of each sliding block far from the bottom of the chute is fixed with a same additional moving sealing strip (19) with a helical structure.

9. A high-seal screw pump motor according to claim 8, wherein the side of the moving additional sealing strip (19) close to the inner wall of the wear tube (2) is provided as a smooth surface.