Oil supply type gear pump capable of reducing shaft abrasion

Abstract

The utility model provides a gear pump capable of supplying oil and reducing shaft abrasion, which comprises a gear pump body, a shell is mounted on the surface of the gear pump body, and a first chamber and a second chamber are arranged in the shell. Through the arrangement of the traction mechanism, the two piston plates can be driven to do reciprocating motion in the first cavity and the second cavity respectively, the pressure intensity of one of the first cavity and the second cavity is increased during single-trip motion, the pressure intensity of the other one is reduced, and at the moment, the pressure intensity can press lubricating oil into the gear pump body through a pipeline; when the piston plate moves continuously, the pressures in the first cavity and the second cavity are gradually opposite, and the lubricating oil is driven to move in the gear pump body from the other direction through the process, so that the lubricating effect of the lubricating oil on an input shaft of the gear pump body is improved; shaft abrasion is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to a gear pump with oil supply function for reducing shaft wear. Background Technique

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquids or increase their pressure. It consists of two gears, a pump body, and front and rear covers, forming two closed spaces. When the gears rotate, the volume of the space on the side where the gears disengage increases from small to large, creating a vacuum to suck in the liquid, and the volume of the space on the side where the gears mesh decreases from large to small, squeezing the liquid into the pipeline. The suction chamber and the discharge chamber are separated by the meshing line of the two gears. The pressure at the discharge port of the gear pump completely depends on the magnitude of the resistance at the pump outlet.

[0003] The gear pump is driven by an electric motor, and the output shaft of the electric motor is connected to the gear. After long-term rotation, the input shaft of the electric motor will be worn. Therefore, lubricating oil is needed for lubrication to reduce the wear of the output shaft. However, at present, the gear pump can only be lubricated by externally adding lubricating oil. The lubricating oil is stationary inside the gear pump and can only move with the rotation of the input shaft, resulting in poor lubrication effect and thus greater wear of the input shaft. Content of the Utility Model

[0004] The purpose of the utility model is to provide a gear pump with oil supply function for reducing shaft wear, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A gear pump with oil supply function for reducing shaft wear, including a gear pump body, a housing is installed on the surface of the gear pump body, a first chamber and a second chamber are arranged inside the housing, piston plates are movably arranged inside the first chamber and the second chamber, the piston plates are connected to the housing through a traction mechanism, pipelines are fixed at both ends of the housing, and the first chamber and the second chamber are both communicated with the inside of the gear pump body through the pipelines;

[0007] The traction mechanism includes a bracket, a chute, a swing arm, a drive shaft, a rotating shaft, and a connecting rod. The bracket is fixed on the surface of the piston plate, the chute is arranged on the surface of the bracket, two swing arms are respectively fixed at one ends of the rotating shaft and the drive shaft, the other end of the rotating shaft is rotatably arranged on the inner wall of the housing, one end of the drive shaft is rotatably arranged on the surface of the housing and extends to the outside, one end of the drive shaft is connected to the housing through a drive mechanism, the other ends of the two swing arms are connected through a connecting rod, and the connecting rod is slidably arranged inside the chute.

[0008] Preferably, the driving mechanism includes an electric push rod, a driving rod, a gear and a tooth. The driving rod is slidably disposed on the surface of the housing. The electric push rod is fixed on the surface of the housing. The output end of the electric push rod is connected to the surface of the driving rod. The tooth is disposed on the side of the driving rod. The gear is fixed to one end of the driving shaft. The gear meshes with the tooth.

[0009] Preferably, a T-shaped track is provided on the surface of the housing, and a groove matching therewith is provided on the surface of the driving rod. The driving rod is slidably disposed on the surface of the T-shaped track through the groove.

[0010] Preferably, two openings are provided on the surface of the housing. The two openings communicate with the first chamber and the second chamber respectively. A end cover is detachably installed on the top of the opening.

[0011] Preferably, the opening is provided with an external thread structure, the end cover is provided with an internal thread structure, and the end cover is threadedly connected to the top of the opening.

[0012] Preferably, limiting rods are fixed to the inner walls of the first chamber and the second chamber. The piston plate is slidably disposed on the surface of the limiting rods.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] Through the arrangement of the traction mechanism, the present utility model can drive the two piston plates to reciprocate inside the first chamber and the second chamber respectively. In a single movement, the pressure in one of the first chamber and the second chamber increases, and the pressure in the other decreases. At this time, the chamber with higher pressure can press the lubricating oil into the gear pump body through the pipeline, and the chamber with lower pressure can pump the lubricating oil out of the gear pump body through the pipeline. When the piston plate continues to move, the pressures inside the first chamber and the second chamber gradually reverse. Through the above process, the lubricating oil is driven to move inside the gear pump body from another direction to increase the lubricating effect of the lubricating oil on the input shaft of the gear pump body and prevent shaft wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the main structure of the housing of the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the housing of the present utility model;

[0018] Figure 4 is a schematic diagram of the main structure of the piston plate of the present utility model;

[0019] Figure 5This is a schematic diagram of the connection structure of the swing arm, rotating shaft, drive shaft and connecting rod of the present utility model.

[0020] In the figure: 1, gear pump body; 2, housing; 3, first chamber; 4, second chamber; 5, piston plate; 6, pipeline; 7, bracket; 8, chute; 9, swing arm; 10, drive shaft; 11, rotating shaft; 12, connecting rod; 13, electric push rod; 14, drive rod; 15, gear; 16, engaging teeth; 17, T-shaped track; 18, opening; 19, end cover; 20, limiting rod. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-5 , the present utility model provides an oil-supplying gear pump for reducing shaft wear, including a gear pump body 1, a housing 2 is installed on the surface of the gear pump body 1, a first chamber 3 and a second chamber 4 are arranged inside the housing 2, piston plates 5 are movably arranged inside both the first chamber 3 and the second chamber 4, the piston plates 5 are connected to the housing 2 through a traction mechanism, pipelines 6 are fixed at both ends of the housing 2, and both the first chamber 3 and the second chamber 4 are communicated with the inside of the gear pump body 1 through the pipelines 6.

[0023] Please refer to Figure 3 , in the initial state, the piston plate 5 inside the first chamber 3 is located at the starting end, and the piston plate 5 inside the second chamber 4 is located at the end. When the traction mechanism acts, the piston plate 5 inside the first chamber 3 moves from the starting end to the end, and the piston plate 5 inside the second chamber 4 moves from the end to the starting end. During this process, the pressure inside the first chamber 3 increases, and the lubricating oil is pressed into the gear pump body 1 through the pipeline 6, while the pressure inside the second chamber 4 decreases, and the lubricating oil inside the gear pump body 1 enters the second chamber 4 through another pipeline 6. As the traction mechanism continues to act, the two piston plates 5 reset. At this time, the pressure inside the second chamber 4 increases, and the lubricating oil is pressed into the gear pump body 1 through the pipeline 6, while the pressure inside the first chamber 3 decreases, and the lubricating oil inside the gear pump body 1 enters the first chamber 3 through another pipeline 6. This enables the lubricating oil to move inside the gear pump body 1 through the two pipelines 6, thereby improving the lubrication effect on the input shaft of the gear pump body 1 to reduce wear.

[0024] The traction mechanism includes a bracket 7, a chute 8, swing arms 9, a drive shaft 10, a rotating shaft 11, and a connecting rod 12. The bracket 7 is fixed to the surface of the piston plate 5. The chute 8 is arranged on the surface of the bracket 7. Two swing arms 9 are respectively fixed to one ends of the rotating shaft 11 and the drive shaft 10. The other end of the rotating shaft 11 is rotatably arranged on the inner wall of the housing 2. One end of the drive shaft 10 is rotatably arranged on the surface of the housing 2 and extends to the outside. One end of the drive shaft 10 is connected to the housing 2 through a drive mechanism. The other ends of the two swing arms 9 are connected through the connecting rod 12. The connecting rod 12 is slidably arranged inside the chute 8.

[0025] Please refer to Figure 3 , 4 and 5. The drive shaft 10 can drive the rotating shaft 11 to rotate through the swing arms 9 and the connecting rod 12. At this time, the swing arm 9 can drive the connecting rod 12 to revolve. Initially, the connecting rod 12 is located in the middle section of the chute 8. When the connecting rod 12 rotates 180°, the revolving connecting rod 12 pushes the piston plate 5 to move horizontally inside the first chamber 3 or the second chamber 4 through the chute 8, so as to realize the pressure regulation inside the first chamber 3 and the second chamber 4.

[0026] The drive mechanism includes an electric push rod 13, a drive rod 14, a gear 15, and a toothed 16. The drive rod 14 is slidably arranged on the surface of the housing 2. The electric push rod 13 is fixed to the surface of the housing 2. The output end of the electric push rod 13 is connected to the surface of the drive rod 14. The toothed 16 is arranged on the side of the drive rod 14. The gear 15 is fixed to one end of the drive shaft 10. The gear 15 meshes with the toothed 16. A T-shaped track 17 is arranged on the surface of the housing 2. A groove matching it is arranged on the surface of the drive rod 14. The drive rod 14 is slidably arranged on the surface of the T-shaped track 17 through the groove.

[0027] Please refer to Figure 1 and 2 , the electric push rod 13 can drive the drive rod 14 to reciprocate horizontally on the surface of the housing 2. When the drive rod 14 reciprocates horizontally, it can drive the toothed 16 to move synchronously. When the toothed 16 moves, it can drive the gear 15 to rotate reciprocally, and then drive the drive shaft 10 to rotate reciprocally synchronously through the gear 15. Moreover, when the drive rod 14 translates, it can move synchronously on the surface of the T-shaped track 17. The arrangement of the T-shaped track 17 can prevent the drive rod 14 from detaching from the surface of the housing 2.

[0028] Two openings 18 are arranged on the surface of the housing 2. The two openings 18 are respectively communicated with the first chamber 3 and the second chamber 4. A end cover 19 is detachably installed at the top of the opening 18. The opening 18 is set as an external thread structure, and the end cover 19 is set as an internal thread structure. The end cover 19 is threadedly connected to the top of the opening 18.

[0029] Please refer to Figure 1 and 2, the arrangement of the opening 18 facilitates the replacement of the lubricating oil inside the first chamber 3 and the second chamber 4. The end cover 19 is threadedly connected to the opening 18. The threaded connection has high strength, simple installation, and convenient use.

[0030] Limiting rods 20 are fixed to the inner walls of both the first chamber 3 and the second chamber 4, and the piston plate 5 is slidably arranged on the surfaces of the limiting rods 20.

[0031] Please refer to Figure 3 , when the piston plate 5 moves horizontally, it can move synchronously on the surfaces of the limiting rods 20. The arrangement of the limiting rods 20 can limit the movement process of the piston plate 5 to prevent the piston plate 5 from getting stuck during movement and unable to drive the lubricating oil to move.

[0032] Although the embodiments of the present invention have been shown and described, for those skilled in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gear pump capable of supplying oil and reducing shaft wear, comprising a gear pump body (1), characterized in that: A housing (2) is mounted on the surface of the gear pump body (1); a first chamber (3) and a second chamber (4) are arranged inside the housing (2); piston plates (5) are movably arranged inside the first chamber (3) and the second chamber (4); the piston plates (5) are connected to the housing (2) via a traction mechanism; pipes (6) are fixed at both ends of the housing (2); the first chamber (3) and the second chamber (4) are connected to the gear pump body (1) via the pipes (6); The traction mechanism comprises a bracket (7), a slide groove (8), a swing arm (9), a drive shaft (10), a rotating shaft (11) and a connecting rod (12); the bracket (7) is fixed to the surface of the piston plate (5); the slide groove (8) is arranged on the surface of the bracket (7); the two swing arms (9) are respectively fixed to one end of the rotating shaft (11) and the drive shaft (10); the other end of the rotating shaft (11) is rotatably arranged on the inner wall of the shell (2); one end of the drive shaft (10) is rotatably arranged on the surface of the shell (2) and extends to the outside; one end of the drive shaft (10) is connected to the shell (2) through the driving mechanism; the other ends of the two swing arms (9) are connected through the connecting rod (12); and the connecting rod (12) is slidably arranged inside the slide groove (8).

2. The oil-supply type gear pump for reducing shaft wear according to claim 1, characterized in that: The driving mechanism comprises an electric push rod (13), a driving rod (14), a gear (15) and a latching tooth (16); the driving rod (14) is slidably arranged on the surface of a housing (2); the electric push rod (13) is fixed to the surface of the housing (2); the output end of the electric push rod (13) is connected to the surface of the driving rod (14); the latching tooth (16) is arranged on the side of the driving rod (14); the gear (15) is fixed to one end of a driving shaft (10); and the gear (15) and the latching tooth (16) are meshed with each other.

3. The oil-supply type gear pump for reducing shaft wear according to claim 2, characterized in that: The surface of the housing (2) is provided with a T-shaped track (17), and the surface of the driving rod (14) is provided with a groove matching the T-shaped track. The driving rod (14) is slidably arranged on the surface of the T-shaped track (17) through the groove.

4. The oil-supply type gear pump for reducing shaft wear according to claim 1, characterized in that: The surface of the shell (2) is provided with two openings (18), the two openings (18) are respectively connected to the first chamber (3) and the second chamber (4), and an end cover (19) is detachably mounted on the top of the opening (18).

5. The oil-supply type gear pump for reducing shaft wear according to claim 4, characterized in that: The opening (18) is configured as an external thread structure, the end cover (19) is configured as an internal thread structure, and the end cover (19) is threadedly connected to the top of the opening (18).

6. The oil-supply type gear pump for reducing shaft wear according to claim 1, characterized in that: The inner walls of the first chamber (3) and the second chamber (4) are both fixed with a limiting rod (20), and the piston plate (5) is slidably arranged on the surface of the limiting rod (20).

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