Axially balanced gear oil pump

Abstract

The utility model discloses an axial balance gear oil pump which comprises a pump body, a driving shaft is arranged on the pump body and located in the center of a gear pump cavity on the lower side, a driving gear is installed on the driving shaft and corresponds to the gear pump cavity on the lower side, a first reinforcing bearing is arranged at the front end of the driving shaft, and a second reinforcing bearing is arranged at the rear end of the driving shaft. And a floating pressing ring is arranged on the driving shaft and located on the rear side of the driving gear, and second reinforcing bearings are arranged at the two ends of the driven shaft correspondingly. Axial force offset can be effectively carried out on the corresponding driving shaft and the driven shaft through the first reinforcing bearing and the second reinforcing bearing, so that the stable operation effect of the driving shaft and the driven shaft is better, and in the working process, a flow of pressure oil is introduced by the pump body to act on the floating pressing ring; the floating pressing ring is attached to the end face of the driving gear, the end face gap is reduced, the volume effect is improved, and therefore the axial force of the gear oil pump is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear oil pumps, in particular to an axially balanced gear oil pump. Background Art

[0002] Gear oil pumps are suitable for conveying various lubricating liquids at temperatures not higher than 70°C. If a high temperature of 200°C is required, high temperature resistant materials can be used. This pump is not suitable for conveying corrosive liquids, liquids containing hard particles or fibers, highly volatile liquids or liquids with low flash points.

[0003] The existing gear oil pump has radial unbalanced force when in use. The pressure from the oil outlet chamber and the oil inlet chamber decreases step by step. The combined force is called radial unbalanced force and points to the oil inlet chamber, which will affect the life of the bearing. If the shaft is bent and deformed, it will cause shell scraping and chamber sweeping, and periodic abnormal noise will be generated during operation. If it lasts for a long time, the pump body will be scrapped. Utility Model Content

[0004] The purpose of the utility model is to provide an axially balanced gear oil pump to solve the above-mentioned problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An axially balanced gear oil pump comprises a pump body, wherein a gear pump cavity is provided inside the pump body, a driving shaft is provided on the pump body and at the center of the gear pump cavity on the lower side, a driving gear is installed on the driving shaft corresponding to the gear pump cavity on the lower side, a first reinforced bearing is provided at the rear end of the driving shaft, a floating pressure ring is provided on the driving shaft and at the front side of the driving gear, a driven shaft is provided on the pump body and at the center of the gear pump cavity on the upper side, a driven gear is provided on the driven shaft and at the center of the gear pump cavity on the upper side, a second reinforced bearing is provided at both ends of the driven shaft, an oil inlet cavity is provided on the right side of the pump body, an oil outlet cavity is provided on the left side of the pump body, a sealing end cover is provided on the front side of the pump body, a drainage channel is provided on the right front side of the sealing end cover, a reflux cavity is provided on the lower side of the pump body, and a spring safety valve is provided at one end of the pump body close to the oil outlet cavity corresponding to the reflux cavity.

[0007] As a preferred solution of the utility model, a bearing reinforcement seat is arranged on the pump body corresponding to the driving shaft, and the driving shaft is connected to the bearing reinforcement seat through a first reinforced bearing.

[0008] As a preferred solution of the utility model, both ends of the driven shaft are respectively connected to the sealing end cover and the pump body through a second reinforced bearing, and the shaft diameters of the driving shaft and the driven shaft are thickened.

[0009] As a preferred solution of the utility model, the inner diameter of the oil inlet cavity is larger than the inner diameter of the oil outlet cavity, and the two ends of the reflux cavity are respectively connected to the oil inlet cavity and the oil outlet cavity.

[0010] As a preferred solution of the utility model, a relief groove is provided on the sealing end cover corresponding to the meshing position between the driving gear and the driven gear, and the outer diameter of the floating pressure ring is slightly larger than the outer diameter of the driving gear.

[0011] As a preferred solution of the utility model, a regulating knob is arranged on the pump body corresponding to the lower end of the spring safety valve, and the upper end of the spring safety valve is connected to the reflux cavity.

[0012] As a preferred solution of the utility model, the tooth top clearance of the driving gear and the driven gear is increased, and the gear meshing overlap of the driving gear and the driven gear is less than 1.

[0013] In the utility model, the bearing reinforcement seat can make the operation transfer stability between the driving shaft and the pump body high, and the meshing operation stability between the driving gear and the driven gear high, thereby effectively avoiding gear wear and making the overall operation stable. The stability of the driven shaft can be reinforced by the second reinforced bearing. At the same time, due to the thickened shaft diameter design of the driving shaft and the driven shaft, the driving shaft and the driven shaft can better resist the axial force, thereby improving the use effect of the gear oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall assembly structure of the utility model;

[0016] Figure 3 It is a partial structural schematic diagram of the utility model;

[0017] Figure 4 This is a schematic diagram of the sealing end cover structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower side of the pump body of the utility model.

[0019] In the figure: 1. Pump body; 2. Gear pump chamber; 3. Driving shaft; 4. Driving gear; 5. First reinforced bearing; 6. Floating pressure ring; 7. Driven shaft; 8. Driven gear; 9. Second reinforced bearing; 10. Oil inlet chamber; 11. Oil outlet chamber; 12. Sealing end cover; 13. Drainage channel; 14. Reflux chamber; 15. Spring safety valve; 16. Bearing reinforcement seat; 17. Unloading groove; 18. Control knob. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in 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.

[0021] Example: See Figure 1-5 An axially balanced gear oil pump shown in the figure comprises a pump body 1, a gear pump chamber 2 is formed inside the pump body 1, a driving shaft 3 is arranged on the pump body 1 and located at the center of the lower gear pump chamber 2, a driving gear 4 is installed on the driving shaft 3 corresponding to the lower gear pump chamber 2, a first reinforced bearing 5 is arranged at the rear end of the driving shaft 3, a floating pressure ring 6 is arranged on the driving shaft 3 and located in front of the driving gear 4, a driven shaft 7 is arranged on the pump body 1 and located on the upper pump body 1 and located at the center of the lower gear pump chamber 2, and a driven shaft 7 is arranged on the upper pump body 1 and located at the center of the lower gear pump chamber 2. A driven gear 8 is arranged on the driving shaft 7 and at the center of the upper gear pump chamber 2, and second reinforced bearings 9 are arranged at both ends of the driven shaft 7. An oil inlet chamber 10 is opened on the right side of the pump body 1, and an oil outlet chamber 11 is opened on the left side of the pump body 1. A sealing end cover 12 is arranged on the front side of the pump body 1, and a drainage channel 13 is arranged on the right front side of the sealing end cover 12. A reflux chamber 14 is opened on the lower side of the interior of the pump body 1, and a spring safety valve 15 is arranged at one end of the interior of the pump body 1 close to the oil outlet chamber 11 and corresponding to the reflux chamber 14. The first reinforced bearing 5 and the second reinforced bearing 9 can effectively offset the axial forces of the corresponding driving shaft 3 and the driven shaft 7, so that the operation stability of the driving shaft 3 and the driven shaft 7 is better. During the operation, the pump body 1 quotes a stream of pressure oil through the drainage channel 13 to act on the floating pressure ring 6, so that the floating pressure ring 6 fits on the end face of the driving gear 4 to reduce the end face gap and improve the volume effect, thereby effectively reducing the generation of the axial force of the gear oil pump. Since the inner diameter of the oil inlet chamber 10 in the gear oil pump is larger than the inner diameter of the oil outlet chamber 11, the cavitation phenomenon generated by the pump body 1 during oil absorption can be effectively eliminated. By reducing the inner diameter of the oil outlet chamber 11, the effective area of ​​the pressure oil can be effectively reduced, and the radial unbalanced force can be effectively reduced. During operation, the reflux chamber 14 can effectively communicate the oil inlet chamber 10 and the oil outlet chamber 11, and the pressure difference between the two can be effectively reduced, so that the radial unbalanced force of the pump body 1 is reduced during operation, thereby improving the use effect and service life of the gear oil pump.

[0022] In this embodiment, refer to Figure 1-5As shown, a bearing reinforcement seat 16 is provided on the pump body 1 corresponding to the driving shaft 3, and the driving shaft 3 is connected to the bearing reinforcement seat 16 through the first reinforcement bearing 5. Its function is that the bearing reinforcement seat 16 can make the running transfer stability between the driving shaft 3 and the pump body 1 high, and can make the meshing running stability between the driving gear 4 and the driven gear 8 high, so as to effectively avoid gear wear and make the overall running stability high.

[0023] The two ends of the driven shaft 7 are respectively connected to the sealing end cover 12 and the pump body 1 through the second reinforced bearing 9, and the shaft diameters of the driving shaft 3 and the driven shaft 7 are thickened. Its function is that the stability of the driven shaft 7 can be reinforced through the second reinforced bearing 9, and at the same time, due to the thickened shaft diameter design of the driving shaft 3 and the driven shaft 7, the driving shaft 3 and the driven shaft 7 can better resist the axial force, so that the use effect of the gear oil pump is good.

[0024] The inner diameter of the oil inlet chamber 10 is larger than the inner diameter of the oil outlet chamber 11, and the two ends of the reflux chamber 14 are respectively connected to the oil inlet chamber 10 and the oil outlet chamber 11. A unloading groove 17 is provided on the sealing end cover 12 at the meshing position with the driving gear 4 and the driven gear 8. The outer diameter of the floating pressure ring 6 is slightly larger than the outer diameter of the driving gear 4. A regulating knob 18 is provided on the pump body 1 corresponding to the lower end of the spring safety valve 15. The upper end of the spring safety valve 15 is connected to the reflux chamber 14. The tooth top clearance of the driving gear 4 and the driven gear 8 is increased, and the gear meshing overlap of the driving gear 4 and the driven gear 8 is less than 1. Its function is that, by making the gear meshing overlap of the driving gear 4 and the driven gear 8 less than 1, the dead volume generated when the driving gear 4 and the driven gear 8 are meshed can be effectively reduced, and the oil trapped phenomenon in the gear oil pump can be effectively avoided, thereby effectively avoiding damage to the gear material. Through the unloading groove 17, when the dead volume of the driving gear 4 and the driven gear 8 changes from large to small, it is connected with the oil outlet chamber 11, and when the dead volume changes from small to large, it is connected with the oil inlet chamber 10, which effectively reduces the cavitation phenomenon of the driving gear 4 and the driven gear 8, produces many tiny bubbles, and avoids the collapse of bubbles under high pressure, which will cause fatigue damage to the gear material, wear and consumption between the driving gear 4 and the driven gear 8, and the gear oil pump, thereby effectively reducing the probability of the gear oil pump scraping the shell and sweeping the bore, and improving the service life of the gear oil pump.

[0025] When the axially balanced gear oil pump in this scheme is used, the driving shaft 3 is connected by an external driver of the coupling, and the driving gear 4 and the driven gear 8 are driven to mesh and drive under the action of the driving shaft 3. Then, under the action of the driving gear 4 and the driven gear 8, a pressure difference is generated between the oil inlet chamber 10 and the oil outlet chamber 11 to realize oil injection operation. During the operation of the gear oil pump, the first reinforced bearing 5 and the second reinforced bearing 9 can effectively offset the axial force of the corresponding driving shaft 3 and the driven shaft 7, so that the operation stability of the driving shaft 3 and the driven shaft 7 is better. During the operation, the pump body 1 quotes a stream of pressure oil to act on the floating pressure ring 6, so that the floating The dynamic pressure ring 6 is fitted on the end face of the driving gear 4 to reduce the end face gap and improve the volume effect, thereby effectively reducing the generation of the axial force of the gear oil pump. Since the inner diameter of the oil inlet chamber 10 in the gear oil pump is larger than the inner diameter of the oil outlet chamber 11, the cavitation phenomenon generated by the pump body 1 during oil absorption can be effectively reduced. By reducing the inner diameter of the oil outlet chamber 11, the pressure oil action area can be effectively reduced, and the radial unbalanced force can be effectively reduced. During operation, the oil inlet chamber 10 and the oil outlet chamber 11 can be effectively communicated through the reflux chamber 14, and the pressure difference between the two can be effectively reduced, so that the radial unbalanced force of the pump body 1 is reduced during operation, thereby improving the use effect and service life of the gear oil pump;

[0026] The bearing reinforcement seat 16 can make the running transfer stability between the driving shaft 3 and the pump body 1 high, and the meshing running stability between the driving gear 4 and the driven gear 8 high, so as to effectively avoid gear wear and make the overall running stable. The second reinforced bearing 9 can reinforce the stability of the driven shaft 7. At the same time, due to the thickened shaft diameter design of the driving shaft 3 and the driven shaft 7, the driving shaft 3 and the driven shaft 7 can better resist the axial force, so that the use effect of the gear oil pump is good;

[0027] By making the gear meshing overlap of the driving gear 4 and the driven gear 8 less than 1, the dead volume generated when the driving gear 4 and the driven gear 8 are meshed can be effectively reduced, and the oil trapped phenomenon in the gear oil pump can be effectively avoided, thereby effectively avoiding damage to the gear material. The unloading groove 17 is connected with the oil outlet chamber 11 when the dead volume of the driving gear 4 and the driven gear 8 changes from large to small, and is connected with the oil inlet chamber 10 when the dead volume changes from small to large, effectively reducing the cavitation phenomenon of the driving gear 4 and the driven gear 8. Many tiny bubbles are generated, and the collapse of bubbles under high pressure is avoided, which will cause fatigue damage to the gear material, wear and consumption between the driving gear 4 and the driven gear 8, and the gear oil pump. The probability of scraping the shell and sweeping the bore of the gear oil pump is effectively reduced, and the service life of the gear oil pump is increased.

[0028] Although the 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. An axially balanced gear oil pump, comprising a pump body (1), characterized in that: The pump body (1) has a gear pump chamber (2) formed inside. A driving shaft (3) is provided on the pump body (1) and at the center of the gear pump chamber (2) on the lower side. A driving gear (4) is mounted on the driving shaft (3) corresponding to the gear pump chamber (2) on the lower side. A first reinforced bearing (5) is provided at the rear end of the driving shaft (3). A floating pressure ring (6) is provided on the driving shaft (3) and at the front side of the driving gear (4). A driven shaft (7) is provided on the pump body (1) and at the center of the gear pump chamber (2) on the lower side. A driven gear (8) is arranged at the center of the gear pump chamber (2) on the upper side, and second reinforced bearings (9) are arranged at both ends of the driven shaft (7). An oil inlet chamber (10) is provided on the right side of the pump body (1), and an oil outlet chamber (11) is provided on the left side of the pump body (1). A sealing end cover (12) is provided on the front side of the pump body (1), and a drainage channel (13) is provided on the right front side of the sealing end cover (12). A reflux chamber (14) is provided on the lower side of the interior of the pump body (1), and a spring safety valve (15) is provided at one end of the interior of the pump body (1) close to the oil outlet chamber (11) and corresponding to the reflux chamber (14).

2. An axially balanced gear oil pump according to claim 1, characterized in that: A bearing reinforcement seat (16) is provided on the pump body (1) corresponding to the driving shaft (3); the driving shaft (3) is connected to the bearing reinforcement seat (16) via a first reinforcement bearing (5).

3. An axially balanced gear oil pump according to claim 1, characterized in that: The two ends of the driven shaft (7) are respectively connected to the sealing end cover (12) and the pump body (1) via a second reinforced bearing (9), and the shaft diameters of the driving shaft (3) and the driven shaft (7) are enlarged.

4. The axially balanced gear oil pump according to claim 1, characterized in that: The inner diameter of the oil inlet chamber (10) is greater than the inner diameter of the oil outlet chamber (11), and the two ends of the return channel (14) are respectively connected to the oil inlet chamber (10) and the oil outlet chamber (11).

5. The axially balanced gear oil pump according to claim 1, characterized in that: The sealing end cover (12) is provided with a relief groove (17) corresponding to the meshing position with the driving gear (4) and the driven gear (8), and the outer diameter of the floating pressure ring (6) is slightly larger than the outer diameter of the driving gear (4).

6. The axially balanced gear oil pump according to claim 1, characterized in that: A regulating knob (18) is provided on the pump body (1) corresponding to the lower end of the spring safety valve (15), and the upper end of the spring safety valve (15) is connected to the reflux cavity (14).

7. An axially balanced gear oil pump according to claim 1, characterized in that: The tooth top clearance of the driving gear (4) and the driven gear (8) is increased, and the gear meshing overlap of the driving gear (4) and the driven gear (8) is less than 1.

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