Structure for eliminating trapped oil of gear pump

Abstract

The utility model discloses a structure for eliminating trapped oil of a gear pump, which comprises a gear pump main body, oil pump gears are symmetrically connected in an inner cavity of the gear pump main body, and a resettable oil guide structure is arranged on the side wall of the gear pump main body and corresponds to the oil pump gears. A resettable oil guide structure is arranged on one side wall of the gear pump main body, and an adjustable switch structure is arranged on the other side wall of the gear pump main body and is symmetrical to the resettable oil guide structure. By means of a fixed guide sleeve, a reset spring, a movable guide sleeve, a fixed sealing seat, a movable sealing seat and a rotating bolt in the resettable oil guide structure and the adjustable switch structure and interaction among all the components, hydraulic oil at the gear meshing position is conveniently guided out. Hydraulic oil at the gear meshing position is conveniently guided out through manual pressing, and therefore the problem of oil trapping of the gear pump is rapidly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to a structure for eliminating oil trapped in a gear pump. Background Art

[0002] Gear pump is a common type of hydraulic pump in industry. It has a simple structure, low cost and strong anti-pollution ability, but its disadvantages are also obvious. It has serious flow pulsation and oil trapping problems, which have a great impact on its normal operation and cause serious noise.

[0003] In order to reduce the harm of oil trapping, the most common method is to open a relief groove on the side end cover of the gear meshing part. However, due to the structural reasons of the relief groove, the position of the relief groove cannot be in the best area to solve the oil trapping phenomenon, resulting in poor oil suction and discharge in the oil trapping area. In the actual working process, due to the small clearance of the gear tooth side, the oil trapping area is divided into two parts, one part becomes larger and the other part becomes smaller, and the oil flow between the two parts is not smooth. This problem cannot be completely solved by the current relief groove; and the relief groove in the prior art usually discharges the high-pressure area of ​​the trapped oil to the oil discharge area of ​​the gear pump, and the low-pressure area of ​​the trapped oil to the oil suction area of ​​the gear pump.

[0004] The above reasons make it impossible to completely eliminate the oil trapped effect of the gear pump, and there are still great problems, which affect the normal operation of the gear pump. Utility Model Content

[0005] In order to solve the problem that the oil trapped effect of the gear pump cannot be completely eliminated and still exists a big problem, which affects the normal operation of the gear pump, the utility model provides a structure for eliminating the oil trapped in the gear pump to solve the above problem.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A structure for eliminating oil trapped in a gear pump, comprising a gear pump body, an oil pump gear symmetrically connected to the inner cavity of the gear pump body, a resettable oil guide structure arranged on a side wall of the gear pump body and corresponding to the oil pump gear, and an adjustable switch structure arranged on another side wall of the gear pump body and symmetrically to the resettable oil guide structure;

[0008] The resettable oil guide structure comprises an oil blowing conduit, the oil blowing conduit is connected to the side wall of the gear pump body, a fixed guide sleeve is connected to the side wall of the gear pump body and located at one side of the oil blowing conduit, a reset spring is connected to the inner cavity of the fixed guide sleeve, a movable guide sleeve is connected to the inner cavity of the fixed guide sleeve and located at one end of the reset spring, a sealing rubber ring is arranged on the side wall of the movable guide sleeve, and a limited position slide groove is arranged on the inner side wall of the fixed guide sleeve and corresponding to the sealing rubber ring;

[0009] The adjustable switch structure includes an oil guide conduit, which is connected to the other side wall of the gear pump body, a fixed sleeve is connected to the side wall of the gear pump body and located on one side of the oil guide conduit, a fixed sealing seat is connected to the inner cavity of the fixed sleeve, a movable sealing seat is arranged in the inner cavity of the fixed sleeve and corresponding to the fixed sealing seat, an oil guide port is arranged on the side wall of the fixed sleeve and located above the movable sealing seat, and a rotating bolt is connected to the side wall of the movable sealing seat.

[0010] As a preferred solution of the utility model, one end of the oil blowing conduit is aligned with the meshing point of the two sets of oil pump gears, and a threaded hole is provided on the side wall of the gear pump body and corresponds to the fixed guide sleeve, wherein the connection method between the fixed guide sleeve and the threaded hole is a threaded connection.

[0011] As a preferred solution of the utility model, connecting platforms are arranged opposite to each other on the side walls of the fixed guide sleeve and the movable guide sleeve, wherein the connecting platforms are connected to the two ends of the reset spring, and the inner side walls of the fixed guide sleeve and the movable guide sleeve are matched with the reset spring in a clearance fit.

[0012] As a preferred solution of the utility model, the connection mode between the inner wall of the fixed guide sleeve and the outer wall of the movable guide sleeve is a sliding connection, the sealing rubber ring is made of rubber material, and the connection mode between the sealing rubber ring and the limiting slide groove is a sliding connection.

[0013] As a preferred solution of the utility model, one end of the oil guide conduit is aligned with the meshing point of the two sets of oil pump gears, and a threaded hole is provided on the side wall of the gear pump body and corresponds to the fixed sleeve, wherein the connection method between the fixed sleeve and the threaded hole is a threaded connection.

[0014] As a preferred solution of the utility model, an inclined guide surface is provided on the side wall where the fixed sealing seat contacts the movable sealing seat, and both the fixed sealing seat and the movable sealing seat are made of rubber material.

[0015] As a preferred solution of the utility model, the connection between the outer wall of the movable sealing seat and the inner wall of the fixed sleeve is a sliding connection, and the end of the rotating bolt is connected to the side wall of the movable sealing seat through a rotating seat, wherein the connection between the rotating bolt and the rotating seat is a rotating connection.

[0016] As a preferred solution of the utility model, a threaded hole is provided on the side wall of the fixing sleeve and corresponds to the rotating bolt, wherein the rotating bolt and the threaded hole are connected by a threaded connection.

[0017] The utility model is provided with a resettable oil guide structure and an adjustable switch structure, thereby utilizing the fixed guide sleeve, reset spring, movable guide sleeve, fixed sealing seat, movable sealing seat, rotating bolt and the interaction between various components in the resettable oil guide structure and the adjustable switch structure, so that the hydraulic oil at the gear meshing position is conveniently led out by design, thereby, in the process of eliminating the use of the structure for oil trapped in the gear pump, when the device is used for a long time, the hydraulic oil at the gear meshing position can be conveniently led out by manual pressing, thereby quickly solving the problem of oil trapped in the gear pump.

[0018] By providing a resettable oil guide structure in the structure for eliminating oil trapped in the gear pump, the fixed guide sleeve, the reset spring, the movable guide sleeve and the interaction between the various components in the resettable oil guide structure are utilized to enable the device to automatically reset after use. As a result, during the use of the structure for eliminating oil trapped in the gear pump, the device can be automatically reset, making the device more convenient when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front and side structures of the utility model;

[0020] Figure 2 For this utility model Figure 1 Schematic diagram of the cross-section structure;

[0021] Figure 3 This is a schematic diagram of the structure of the resettable oil guide structure of the utility model;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the cross-section structure;

[0023] Figure 5 This is a schematic diagram of the structure of the adjustable switch structure of the utility model;

[0024] Figure 6 For this utility model Figure 5 Schematic diagram of the cross-section structure.

[0025] In the figure: 1. gear pump body; 2. oil pump gear; 3. resettable oil guide structure; 4. adjustable switch structure; 301. oil blowing guide tube; 302. fixed guide sleeve; 303. reset spring; 304. movable guide sleeve; 305. sealing rubber ring; 306. limiting slide groove; 401. oil guide tube; 402. fixed sleeve; 403. fixed sealing seat; 404. movable sealing seat; 405. oil guide port; 406. rotating bolt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] For example, please refer to Figure 1-6 , the utility model provides a technical solution:

[0028] A structure for eliminating oil trapped in a gear pump comprises a gear pump body 1, an oil pump gear 2 is symmetrically connected to the inner cavity of the gear pump body 1, a resettable oil guide structure 3 is arranged on the side wall of the gear pump body 1 and corresponds to the oil pump gear 2, and an adjustable switch structure 4 is arranged on the other side wall of the gear pump body 1 and symmetrically with the resettable oil guide structure 3.

[0029] In this embodiment, reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The resettable oil guide structure 3 includes an oil blowing conduit 301, which is connected to the side wall of the gear pump body 1. A fixed guide sleeve 302 is connected to the side wall of the gear pump body 1 and located on one side of the oil blowing conduit 301. A reset spring 303 is connected to the inner cavity of the fixed guide sleeve 302. A movable guide sleeve 304 is connected to the inner cavity of the fixed guide sleeve 302 and located at one end of the reset spring 303. A sealing rubber ring 305 is arranged on the side wall of the movable guide sleeve 304. A limiting sliding groove 306 is arranged on the inner wall of the fixed guide sleeve 302 and corresponding to the sealing rubber ring 305.

[0030] Based on the above structure and the connection relationship of the above structure, the movable guide sleeve 304 is manually pressed to move the movable guide sleeve 304 in the inner cavity of the fixed guide sleeve 302, and at the same time, the air between the movable guide sleeve 304 and the fixed guide sleeve 302 is compressed, so that the compressed air is brought out from the other end of the oil blowing conduit 301, thereby blowing the oil at the meshing point of the two sets of oil pump gears 2 into the oil guide conduit 401, and then under the reaction force of the reset spring 303, the movable guide sleeve 304 and the fixed guide sleeve 302 return to their original positions.

[0031] One end of the oil blowing conduit 301 is aligned with the meshing position of the two groups of oil pump gears 2, and a threaded hole is arranged on the side wall of the gear pump body 1 and corresponds to the fixed guide sleeve 302, wherein the fixed guide sleeve 302 is connected to the threaded hole by a threaded connection, and connecting platforms are arranged opposite to the side walls of the fixed guide sleeve 302 and the movable guide sleeve 304, wherein the connecting platforms are connected to the two ends of the reset spring 303, and the inner side walls of the fixed guide sleeve 302 and the movable guide sleeve 304 are matched with the reset spring 303 by a clearance fit, and the inner side wall of the fixed guide sleeve 302 and the outer side wall of the movable guide sleeve 304 are connected by a sliding connection, and the sealing rubber ring 305 is made of rubber material, and the sealing rubber ring 305 is connected to the limiting slide groove 306 by a sliding connection, so that the device is smoother when in use.

[0032] In this embodiment, reference Figure 1 , Figure 2 , Figure 5 and Figure 6 The adjustable switch structure 4 includes an oil guide conduit 401, which is connected to the other side wall of the gear pump body 1. A fixed sleeve 402 is connected to the side wall of the gear pump body 1 and located on one side of the oil guide conduit 401. A fixed sealing seat 403 is connected to the inner cavity of the fixed sleeve 402. A movable sealing seat 404 is arranged in the inner cavity of the fixed sleeve 402 and corresponds to the fixed sealing seat 403. An oil guide port 405 is arranged on the side wall of the fixed sleeve 402 and located above the movable sealing seat 404. A rotating bolt 406 is connected to the side wall of the movable sealing seat 404.

[0033] Based on the above structure and the connection relationship of the above structure, by manually rotating the rotating bolt 406, the movable sealing seat 404 at the other end of the rotating bolt 406 moves in the inner cavity of the fixed sleeve 402, so that the oil guide port 405 is opened.

[0034] One end of the oil guide conduit 401 is aligned with the meshing point of the two groups of oil pump gears 2, and a threaded hole is provided on the side wall of the gear pump body 1 and corresponds to the fixed sleeve 402, wherein the connection mode of the fixed sleeve 402 and the threaded hole is a threaded connection, and an inclined guide surface is provided on the side wall where the fixed sealing seat 403 and the movable sealing seat 404 contact, and the fixed sealing seat 403 and the movable sealing seat 404 are both made of rubber material, and the connection mode of the outer wall of the movable sealing seat 404 and the inner wall of the fixed sleeve 402 is a sliding connection, and the end of the rotating bolt 406 is connected to the side wall of the movable sealing seat 404 through the rotating seat, wherein the connection mode of the rotating bolt 406 and the rotating seat is a rotating connection, and a threaded hole is provided on the side wall of the fixed sleeve 402 and corresponds to the rotating bolt 406, wherein the connection mode of the rotating bolt 406 and the threaded hole is a threaded connection, so that the device can be more smoothly used.

[0035] The working process of the utility model is as follows: when using the structure for eliminating oil trapped in the gear pump, a threaded hole is opened on the side wall of the fixed sleeve 402 and corresponds to the rotating bolt 406, wherein the rotating bolt 406 is connected to the threaded hole in a threaded manner, and the end of the rotating bolt 406 is connected to the side wall of the movable sealing seat 404 through a rotating seat, wherein the rotating bolt 406 is connected to the rotating seat in a rotating manner, and the rotating bolt 406 is manually rotated under the condition that the outer wall of the movable sealing seat 404 and the inner wall of the fixed sleeve 402 are connected in a sliding manner, so that the movable sealing seat 404 moves in the fixed sleeve 402, and when the movable sealing seat 404 moves in the fixed sleeve 402, the oil guide port 405 is opened.

[0036] When the inner wall of the fixed guide sleeve 302 and the outer wall of the movable guide sleeve 304 are connected in a sliding manner, the sealing rubber ring 305 is made of rubber material, and the sealing rubber ring 305 and the limiting slide groove 306 are connected in a sliding manner, the movable guide sleeve 304 is manually pressed, so that the movable guide sleeve 304 compresses the air in the sealed space between the fixed guide sleeve 302 and the movable guide sleeve 304, so that the gas is discharged from the other end of the oil blowing conduit 301, thereby blowing the oil at the meshing position of the two sets of oil pump gears 2 into the oil guide conduit 401, and the hydraulic oil is discharged from the oil guide port 405, and then under the reaction force of the reset spring 303, the fixed guide sleeve 302 and the movable guide sleeve 304 are restored to their original position, and the oil guide port 405 is sealed by rotating the rotating bolt 406.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structure for eliminating oil trapped in a gear pump, comprising a gear pump body (1), characterized in that: An oil pump gear (2) is symmetrically connected to the inner cavity of the gear pump body (1); a resettable oil guide structure (3) is arranged on a side wall of the gear pump body (1) and corresponds to the oil pump gear (2); and an adjustable switch structure (4) is arranged on another side wall of the gear pump body (1) and symmetrically to the resettable oil guide structure (3); The resettable oil guide structure (3) comprises an oil blowing conduit (301), the oil blowing conduit (301) being connected to the side wall of the gear pump body (1), a fixed guide sleeve (302) being connected to the side wall of the gear pump body (1) and located at one side of the oil blowing conduit (301), a reset spring (303) being connected to the inner cavity of the fixed guide sleeve (302), a movable guide sleeve (304) being connected to the inner cavity of the fixed guide sleeve (302) and located at one end of the reset spring (303), a sealing rubber ring (305) being arranged on the side wall of the movable guide sleeve (304), and a limiting sliding groove (306) being arranged on the inner side wall of the fixed guide sleeve (302) and corresponding to the sealing rubber ring (305); The adjustable switch structure (4) comprises an oil guide conduit (401), the oil guide conduit (401) being connected to the other side wall of the gear pump body (1), a fixed sleeve (402) being connected to the side wall of the gear pump body (1) and located on one side of the oil guide conduit (401), a fixed sealing seat (403) being connected to the inner cavity of the fixed sleeve (402), a movable sealing seat (404) being arranged in the inner cavity of the fixed sleeve (402) and corresponding to the fixed sealing seat (403), an oil guide port (405) being arranged on the side wall of the fixed sleeve (402) and located above the movable sealing seat (404), and a rotating bolt (406) being connected to the side wall of the movable sealing seat (404).

2. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: One end of the oil blowing conduit (301) is aligned with the meshing position of the two sets of oil pump gears (2), and a threaded hole is provided on the side wall of the gear pump body (1) and corresponds to the fixed guide sleeve (302), wherein the fixed guide sleeve (302) and the threaded hole are connected by threaded connection.

3. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: Connecting platforms are arranged opposite to each other on the side walls of the fixed guide sleeve (302) and the movable guide sleeve (304), wherein the connecting platforms are connected to the two ends of the reset spring (303), and the inner side walls of the fixed guide sleeve (302) and the movable guide sleeve (304) are matched with the reset spring (303) in a clearance fit.

4. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: The inner wall of the fixed guide sleeve (302) and the outer wall of the movable guide sleeve (304) are connected in a sliding manner. The sealing rubber ring (305) is made of rubber material. The sealing rubber ring (305) and the limiting sliding groove (306) are connected in a sliding manner.

5. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: One end of the oil guide conduit (401) is aligned with the meshing position of the two sets of oil pump gears (2), and a threaded hole is provided on the side wall of the gear pump body (1) and corresponds to the fixed sleeve (402), wherein the fixed sleeve (402) and the threaded hole are connected by threaded connection.

6. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: An inclined guide surface is provided on the side wall where the fixed sealing seat (403) and the movable sealing seat (404) are in contact, and both the fixed sealing seat (403) and the movable sealing seat (404) are made of rubber material.

7. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: The outer wall of the movable sealing seat (404) and the inner wall of the fixed sleeve (402) are connected in a sliding manner, and the end of the rotating bolt (406) is connected to the side wall of the movable sealing seat (404) through the rotating seat, wherein the rotating bolt (406) and the rotating seat are connected in a rotating manner.

8. The structure for eliminating oil trapped in a gear pump according to claim 1, characterized in that: A threaded hole is provided on the side wall of the fixing sleeve (402) and corresponds to the rotating bolt (406), wherein the rotating bolt (406) and the threaded hole are connected by threaded connection.

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