Low-abrasion light-sweeping chamber gear oil pump
By optimizing the pump body structure in the gear oil pump, including the difference in inner diameters of the oil inlet and oil outlet chambers, thickening of the gear shaft diameter and fixing of the sliding bearing, the problems of radial imbalance force and oil trapping are solved, and the bearing life is extended And improve the use effect of the pump.
Patent Information
- Application Number
- CN202420779084.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Existing gear oil pumps are prone to radial imbalance and oil trapping when in use, resulting in shortening of bearing life, scraping shells and wearing, and thus causing the pump body to be scrapped.
A low-wear sweeper gear oil pump is designed, by setting the inner diameter difference between the oil inlet and oil outlet chambers in the pump body, the gear shaft diameter of the driving gear and driven gear is bolded, and the sliding bearing fixing, meshing overlap degree Gear structures less than 1, as well as a combination of return chamber and spring safety valves, reduce radial imbalance forces and dead volume, reduce scraping and wear.
It effectively reduces radial imbalance force, extends the bearing life, reduces the occurrence of scraping shells and scrubbing, and improves the service effect and life of gear oil pumps.
Smart Images
Figure CN222208271U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear oil pumps, in particular to a low-wear light-sweep bore 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] Existing gear oil pumps have radial unbalanced force and oil trapped phenomena when in use. The pressure from the oil outlet chamber and the oil inlet chamber decreases step by step, and the combined force is called radial unbalanced force, which points to the oil inlet chamber and 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. The oil trapped phenomenon will cause wear between the gears, thereby causing shell scraping and chamber sweeping. Utility Model Content
[0004] In order to solve the problem that the pressure of the gear oil pump from the oil outlet chamber and the oil inlet chamber decreases step by step, the resultant 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 phenomenon, and periodic abnormal noise will be generated during operation. If the time is too long, the pump body will be scrapped. The oil trapped phenomenon will cause wear between the gears, thereby causing shell scraping and chamber sweeping phenomenon. The purpose of the utility model is to provide a low-wear light-sweeping 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] A low-wear lightly swept gear oil pump comprises a pump body, wherein gear pump chambers are correspondingly opened at the upper and lower parts of the pump body, a driving shaft is arranged on the pump body and at the center of the gear pump chamber on the lower side, a driving gear is installed on the driving shaft corresponding to the gear pump chamber on the lower side, a driven shaft is arranged on the pump body and at the center of the gear pump chamber on the upper side, a driven gear is arranged on the driven shaft and at the center of the gear pump chamber on the upper side, an oil inlet chamber is opened on the right side of the pump body, an oil outlet chamber is opened on the left side of the pump body, a sealing cover plate is arranged on the front side of the pump body, a reflux chamber is opened on the lower side of the pump body, and a spring safety valve is arranged at one end of the pump body close to the oil outlet chamber corresponding to the reflux chamber.
[0007] 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.
[0008] As a preferred solution of the utility model, the gear shaft diameters of the driving gear and the driven gear are thickened and fixed with sliding bearings.
[0009] As a preferred solution of the utility model, two ends of the reflux cavity are connected to the oil inlet cavity and the oil outlet cavity.
[0010] As a preferred solution of the utility model, the gear meshing overlap between the driving gear and the driven gear is less than 1, and unloading grooves are provided on the inner side surface of the sealing cover plate corresponding to the driving gear and the driven gear.
[0011] As a preferred solution of the utility model, a regulating spiral knob is correspondingly arranged on the pump body and located at the lower end of the spring safety valve.
[0012] As a preferred solution of the utility model, an extension sleeve is arranged on the pump body and the sealing cover plate corresponding to the driving shaft, and a reinforced bearing is arranged inside the extension sleeve corresponding to the driving shaft.
[0013] The utility model can effectively prevent cavitation phenomenon generated by the pump body when absorbing oil by making the inner diameter of the oil inlet chamber larger than the inner diameter of the oil outlet chamber, and can effectively reduce the action area of the pressure oil by reducing the inner diameter of the oil outlet chamber, and can effectively reduce the radial unbalanced force. During operation, the oil inlet chamber and the oil outlet chamber can be effectively communicated through the reflux cavity, and the pressure difference between the two can be effectively reduced, so that the radial unbalanced force of the pump body is reduced during operation, the service life of the bearing is prolonged, the deformation of the shaft is avoided, the occurrence of shell scraping and chamber sweeping phenomenon is reduced, and the use effect and service life of the gear oil pump are improved.
[0014] The utility model can effectively offset the radial unbalanced force generated when the gear oil pump is in use by thickening the gear shaft diameters of the driving gear and the driven gear and using sliding bearings to fix them, thereby avoiding the shell scraping and bore sweeping phenomenon of the gear oil pump. By making the gear meshing overlap of the driving gear and the driven gear less than 1, the dead volume generated when the driving gear and the driven gear 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 is connected with the oil outlet chamber when the dead volume of the driving gear and the driven gear changes from large to small, and is connected with the oil inlet chamber when the dead volume changes from small to large, thereby effectively reducing the generation of cavitation phenomenon of the driving gear and the driven gear, reducing the wear and consumption between the driving gear and the driven gear, thereby effectively reducing the probability of the gear oil pump scraping and bore sweeping, and improving the service life of the gear oil pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of the gear oil pump of the utility model;
[0016] Figure 2 This is a partial structural diagram of the gear oil pump of the utility model;
[0017] Figure 3 This is a schematic diagram of the pump structure of the utility model;
[0018] Figure 4 This is a schematic diagram of the sealing cover structure of the utility model;
[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower side of the pump body of the utility model.
[0020] In the figure: 1. Pump body; 2. Gear pump chamber; 3. Driving shaft; 4. Driving gear; 5. Driven shaft; 6. Driven gear; 7. Oil inlet chamber; 8. Oil outlet chamber; 9. Sealing cover plate; 10. Return chamber; 11. Spring safety valve; 12. Unloading groove; 13. Extension sleeve; 14. Reinforced bearing. DETAILED DESCRIPTION
[0021] 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.
[0022] Example: See Figure 1-5 A low-wear lightly swept gear oil pump shown in the figure comprises a pump body 1, gear pump chambers 2 are correspondingly opened at the upper and lower parts of 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 driven shaft 5 is arranged on the pump body 1 and located at the center of the upper pump body 1 and located at the center of the lower gear pump chamber 2, a driven gear 6 is arranged on the driven shaft 5 and located at the center of the upper gear pump chamber 2, an oil inlet chamber 7 is opened on the right side of the pump body 1, an oil outlet chamber 8 is opened on the left side of the pump body 1, a sealing cover plate 9 is arranged on the front side of the pump body 1, a reflux chamber 10 is opened on the lower side of the pump body 1, and a spring safety valve 11 is arranged at one end of the pump body 1 close to the oil outlet chamber 8 corresponding to the reflux chamber 10. By making the inner diameter of the oil inlet chamber 7 larger than the inner diameter of the oil outlet chamber 8, the cavitation phenomenon generated by the pump body 1 when absorbing oil can be effectively prevented. By reducing the inner diameter of the oil outlet chamber 8, the effective area of the pressure oil can be effectively reduced, and the radial unbalanced force can be effectively reduced. During operation, the oil inlet chamber 7 and the oil outlet chamber 8 can be effectively communicated through the reflux chamber 10, 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, the service life of the bearing is increased, the deformation of the shaft is avoided, the occurrence of shell scraping and chamber sweeping phenomenon is reduced, and the use effect and service life of the gear oil pump are improved.
[0023] In this embodiment, refer to Figure 2-5 As shown, the inner diameter of the oil inlet chamber 7 is larger than the inner diameter of the oil outlet chamber 8, the gear shaft diameters of the driving gear 4 and the driven gear 6 are thickened and fixed with sliding bearings, and the two ends of the return channel 10 are connected to the oil inlet chamber 7 and the oil outlet chamber 8. Its function is that by thickening the gear shaft diameters of the driving gear 4 and the driven gear 6 and fixing them with sliding bearings, the radial unbalanced force generated when the gear oil pump is used can be effectively offset, thereby avoiding the occurrence of the shell scraping and chamber sweeping phenomenon of the gear oil pump.
[0024] The gear meshing overlap between the driving gear 4 and the driven gear 6 is less than 1, and a relief groove 12 is provided on the inner side of the sealing cover plate 9 corresponding to the driving gear 4 and the driven gear 6. The gear meshing overlap between the driving gear 4 and the driven gear 6 is less than 1, which can effectively reduce the dead volume generated when the driving gear 4 and the driven gear 6 are meshed, effectively avoid the oil trapping phenomenon in the gear oil pump, and thus effectively avoid the damage to the gear material. The relief groove 12 is communicated with the oil outlet chamber 8 when the dead volume of the driving gear 4 and the driven gear 6 changes from large to small, and is communicated with the oil inlet chamber 7 when the dead volume changes from small to large, which effectively reduces the generation of cavitation between the driving gear 4 and the driven gear 6, reduces the wear and consumption between the driving gear 4 and the driven gear 6, 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] The pump body 1 is provided with a regulating spiral knob at the lower end of the spring safety valve 11, and the pump body 1 and the sealing cover plate 9 are provided with an extension sleeve 13 corresponding to the driving shaft 3, and a reinforcement bearing 14 is provided inside the extension sleeve 13 corresponding to the driving shaft 3. The regulating spiral knob can be used to regulate the stress level of the spring safety valve 11, so that the reflux cavity 10 is connected with the oil inlet cavity 7 and the oil outlet cavity 8 for better use, so that the radial unbalanced force of the gear oil pump is reduced during operation, and the use effect and life of the gear oil pump are improved.
[0026] When the low-wear light-sweeping gear oil pump in this scheme is in use, the driving shaft 3 works to make the driving gear 4 and the driven gear 6 mesh and drive each other, so that one side of the oil inlet chamber 7 of the pump body 1 generates absorption pressure, and one side of the oil outlet chamber 8 generates injection pressure. The inner diameter of the oil inlet chamber 7 is larger than the inner diameter of the oil outlet chamber 8, which can effectively prevent the cavitation phenomenon generated by the pump body 1 when absorbing oil. By reducing the inner diameter of the oil outlet chamber 8, the effective area of the pressure oil can be effectively reduced, and the radial unbalanced force can be effectively reduced. During operation, the oil inlet chamber 7 and the oil outlet chamber 8 can be effectively communicated through the reflux cavity 10, which can effectively reduce the pressure difference between the two, reduce the radial unbalanced force of the pump body 1 during operation, improve the service life of the bearing during use, avoid deformation of the shaft, reduce the occurrence of shell scraping and bore sweeping, and improve the use effect and service life of the gear oil pump. By thickening the gear shaft diameters of the driving gear 4 and the driven gear 6 and fixing them with sliding bearings, the radial unbalanced force generated when the gear oil pump is in use can be effectively offset, thereby avoiding the occurrence of shell scraping and bore sweeping in the gear oil pump.
[0027] By making the gear meshing overlap of the driving gear 4 and the driven gear 6 less than 1, the dead volume generated when the driving gear 4 and the driven gear 6 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 12 is connected with the oil outlet chamber 8 when the dead volume of the driving gear 4 and the driven gear 6 changes from large to small, and is connected with the oil inlet chamber 7 when the dead volume changes from small to large, thereby effectively reducing the generation of cavitation between the driving gear 4 and the driven gear 6, and reducing the wear and consumption between the driving gear 4 and the driven gear 6, 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.
[0028] 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 low-wear lightly swept gear oil pump, comprising a pump body (1), characterized in that: The pump body (1) has gear pump chambers (2) correspondingly formed at the top and bottom thereof; a driving shaft (3) is provided on the pump body (1) and at the center of the gear pump chamber (2) at the bottom; a driving gear (4) is mounted on the driving shaft (3) and corresponding to the gear pump chamber (2) at the bottom; a driven shaft (5) is provided on the pump body (1) and at the center of the gear pump chamber (2) at the top; a driven gear (6) is provided on the driven shaft (5) and at the center of the gear pump chamber (2) at the top; an oil inlet chamber (7) is provided on the right side of the pump body (1); an oil outlet chamber (8) is provided on the left side of the pump body (1); a sealing cover plate (9) is provided on the front side of the pump body (1); a return chamber (10) is provided on the bottom of the pump body (1); and a spring safety valve (11) is provided at one end of the pump body (1) close to the oil outlet chamber (8) and corresponding to the return chamber (10).
2. A low-wear lightly swept gear oil pump according to claim 1, characterized in that: The inner diameter of the oil inlet chamber (7) is greater than the inner diameter of the oil outlet chamber (8).
3. A low-wear lightly swept gear oil pump according to claim 1, characterized in that: The gear shaft diameters of the driving gear (4) and the driven gear (6) are thickened and fixed with sliding bearings.
4. A low-wear lightly swept gear oil pump according to claim 1, characterized in that: Both ends of the reflux cavity (10) are connected to the oil inlet cavity (7) and the oil outlet cavity (8).
5. A low-wear lightly swept gear oil pump according to claim 1, characterized in that: The gear meshing overlap between the driving gear (4) and the driven gear (6) is less than 1, and unloading grooves (12) are provided on the inner side surface of the sealing cover plate (9) corresponding to the driving gear (4) and the driven gear (6).
6. A low-wear lightly swept gear oil pump according to claim 1, characterized in that: A regulating screw knob is provided on the pump body (1) and at the lower end of the spring safety valve (11).
7. A low-wear lightly swept gear oil pump according to claim 1, characterized in that: An extension sleeve (13) is provided on the pump body (1) and the sealing cover plate (9) corresponding to the driving shaft (3), and a reinforcement bearing (14) is provided inside the extension sleeve (13) corresponding to the driving shaft (3).