CN215409175U

CN215409175U - Gear type oil transfer pump

Info

Publication number: CN215409175U
Application number: CN202121442331.2U
Authority: CN
Inventors: 冯清华; 冯树云; 雷如刚; 冯清云
Original assignee: Jinhu Changsheng Power Machinery Part Co ltd
Current assignee: Jinhu Changsheng Power Machinery Part Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-01-04
Anticipated expiration: 2031-06-28

Abstract

The utility model discloses a gear type oil transfer pump, which comprises a pump body, a pump cover, a driving gear, a driven gear, a pressure limiting valve and an exhaust valve, wherein the pump cover is arranged on the pump body; an accommodating cavity is formed in one side of the pump body, two supporting columns are arranged in the accommodating cavity, an oil drainage groove is formed between the supporting columns, and an oil inlet and an oil outlet are formed in the front side of the pump body; the driving gear and the driven gear are meshed with each other and are respectively and rotatably connected to the support, a transition block used for connecting a driving shaft is arranged on the driving gear, and an oil suction cavity and an oil discharge cavity are formed in two sides of the driving gear and the driven gear; the oil inlet is communicated with the oil suction cavity through the oil inlet hole, and the oil outlet is communicated with the oil discharge cavity through the oil outlet hole; the pump cover is connected to the pump body in a sealing mode, a lubricating groove is formed in the inner side of the pump cover, one end of the lubricating groove is communicated with the oil unloading cavity, and the other end of the lubricating groove is communicated with the joint of the driven gear and the strut. According to the utility model, the oil drainage groove is formed between the two support columns, so that the closed high-pressure oil between the driving gear and the driven gear is communicated with the oil suction cavity or the oil discharge cavity, and the problem of oil trapping is solved.

Description

Gear type oil transfer pump

Technical Field

The utility model relates to the technical field of high-pressure common rail systems of diesel engines, in particular to a gear type oil delivery pump.

Background

A gear type oil transfer pump is a device for converting mechanical energy into hydraulic energy, and is a rotary pump for transferring or pressurizing liquid by means of the change and movement of a working volume formed between a pump cylinder and a meshing gear. When the gear rotates, the space volume of the gear on the disengaging side is increased from small to large, vacuum is formed, and liquid is sucked; the space volume of the gear meshing side is reduced from large, and liquid is squeezed into the oil outlet. The gear pump has the characteristics of simple structure, low manufacturing cost, reliable work and capability of realizing high rotating speed and high pressure, is an important component of a hydraulic system, and is widely applied to the automobile industry.

However, the gear pump itself is trapped in oil during operation, causing pressure shock or cavitation, thereby generating vibration and noise, seriously affecting the comfort of the whole vehicle and reducing the quality of the whole vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gear type oil transfer pump, wherein an oil drainage groove is formed between two supporting columns, so that closed high-pressure oil between a driving gear and a driven gear is communicated with an oil suction cavity or an oil discharge cavity, and the problems in the background art are solved.

In order to achieve the purpose, the utility model provides the following technical scheme:

a gear type oil transfer pump comprises a pump body, a pump cover, a driving gear, a driven gear, a pressure limiting valve and an exhaust valve; an accommodating cavity is formed in one side of the pump body, two supporting columns are arranged in the accommodating cavity, an oil drainage groove is formed between the supporting columns, and an oil inlet and an oil outlet are formed in the front side of the pump body; the driving gear and the driven gear are meshed with each other and are respectively and rotatably connected to the support, a transition block used for connecting a driving shaft is arranged on the driving gear, and an oil suction cavity and an oil discharge cavity are formed in two sides of the driving gear and the driven gear; the oil inlet is communicated with the oil suction cavity through the oil inlet hole, and the oil outlet is communicated with the oil discharge cavity through the oil outlet hole; the pump cover is connected to the pump body in a sealing mode, a lubricating groove is formed in the inner side of the pump cover, one end of the lubricating groove is communicated with the oil unloading cavity, the other end of the lubricating groove is communicated with the joint of the driven gear and the strut, a lubricating hole is formed in the pump cover, and the lubricating hole is communicated into the oil unloading cavity; the pressure limiting hole and the exhaust hole are respectively arranged on two sides of the pump body, the pressure limiting hole is communicated with the oil inlet hole, the exhaust hole is communicated with the oil outlet hole, and the pressure limiting valve and the exhaust valve are respectively connected to the pressure limiting hole and the exhaust hole.

The utility model has the further improvement scheme that a sealing groove is arranged at the upper opening of the accommodating cavity, and a sealing gasket is arranged in the sealing groove; the pump body on the two sides of the accommodating cavity is connected with a positioning pin, and the pump cover is inserted into the positioning pin and connected onto the pump body through a bolt.

The utility model has the further improvement scheme that the end part of the driving gear is provided with a toothed caulking groove, the transition block is in a cross-joint shape and is in interference fit in the caulking groove, and the middle part of the transition block is provided with a connecting hole for installing the driving shaft.

The utility model has the further improvement scheme that the pressure limiting hole is communicated with the oil inlet hole and the oil outlet hole; the pressure limiting valve comprises a valve sleeve, a valve rod, a pressure limiting spring and a steel ball A, the valve sleeve is in threaded and sealed connection with the pressure limiting hole, a plurality of throttling holes are formed in the valve sleeve, and the throttling holes are located at the intersection of the pressure limiting hole and the oil inlet hole; the valve rod is connected to the inner wall of the valve sleeve in a sliding mode, the steel ball A is in interference fit with the tail end of the valve sleeve, and the pressure limiting spring is located in the valve sleeve between the valve rod and the steel ball A.

The utility model has the further improvement scheme that the exhaust hole is communicated with the oil inlet hole and the oil outlet hole; the exhaust valve comprises a screw plug, an exhaust spring and a steel ball B, the screw plug is in threaded and sealed connection with the exhaust hole, the steel ball B abuts against a step at the joint of the exhaust hole and the oil outlet hole, and the exhaust spring is located between the screw plug and the steel ball B.

The utility model has the further improvement scheme that the two ends of the pump body are provided with a process hole a, a process hole b and a process hole c; the process hole a is communicated with the oil inlet hole, the process hole b is communicated with the oil outlet hole, the process hole C is communicated with the pressure limiting hole, and the process hole a, the process hole b and the process hole C are respectively in interference fit with a steel ball C, a steel ball D and a steel ball E.

The utility model has the further improvement scheme that a concave part is arranged on the front side of the pump body, and rib plates which are staggered transversely and longitudinally are arranged in the concave part.

The utility model has the further improvement scheme that a plurality of light-weight grooves are formed in the rear side of the pump body.

In a further improvement of the utility model, the teeth of the driving gear and the driven gear are ten.

The utility model has the beneficial effects that:

according to the gear type oil transfer pump, the oil drainage groove is formed between the two support columns, so that the closed high-pressure oil between the driving gear and the driven gear is communicated with the oil suction cavity or the oil discharge cavity, and the problem of oil trapping is solved.

The gear type oil transfer pump has the advantages that the oil inlet and the oil outlet are arranged on the same side of the pump body, the installation space is saved, the installation is convenient, and the problem of interference with other surrounding parts is solved.

In the gear type oil transfer pump, the lubricating groove is formed in the inner side of the pump cover, so that the gears can be conveniently lubricated, and in addition, the lubricating hole is convenient for oil outlet to lubricate other parts.

The gear type oil transfer pump has the advantages that the pressure limiting valve can accurately control oil pressure to prevent overload, and the service life of the gear pump is prolonged.

The exhaust valve of the gear type oil transfer pump can effectively prevent air from entering the gear pump to cause cavitation.

Sixth, the gear type oil transfer pump of the utility model, the drive shaft is connected with the driving gear by the cross-shaped transition block, the transmission is stable and reliable.

And the two ends of the pump body are provided with the process hole a, the process hole b and the process hole c, so that the gear pump is convenient to assemble.

The gear type oil transfer pump has the advantages that the front side of the pump body is provided with the concave part, the weight of the pump body can be reduced, and the concave part is internally provided with the rib plates which are staggered transversely and longitudinally, so that the heat dissipation of the gear pump is facilitated.

The gear type oil transfer pump has the advantages that the rear side of the pump body is provided with the plurality of grooves, so that the weight of the gear pump is effectively reduced.

The gear type oil transfer pump has ten teeth of the driving gear and the driven gear, so that the pressure of the oil relief cavity only acts in the range from one tooth to two teeth, the radial unbalanced force is reduced, and the abrasion of the gear and the strut is reduced.

Drawings

Fig. 1 and 2 are schematic overall structural diagrams of the present invention.

Fig. 3 is a schematic structural view of the driving gear and the driven gear of the present invention.

Fig. 4 is a partial cross-sectional view of the present invention.

Fig. 5 is a cross-sectional view taken at a-a in fig. 4.

Fig. 6 is a schematic diagram of the pump body structure of the present invention.

Fig. 7 is a schematic diagram of a pump cover structure according to the present invention.

FIG. 8 is a schematic view of a driving gear structure according to the present invention.

Fig. 9 is a schematic view of the transition block structure of the present invention.

In the figure: 1-pump body, 101-support, 102-oil drainage groove, 103-oil inlet, 104-oil outlet, 105-oil inlet, 106-oil outlet, 107-oil suction cavity, 108-oil discharge cavity, 109-pressure limiting hole, 110-exhaust hole, 111-process hole a, 112-process hole B, 113-process hole c, 114-depressed part, 115-rib plate, 116-groove, 2-pump cover, 201-lubricating groove, 202-lubricating hole, 3-driving gear, 301-caulking groove, 4-driven gear, 5-pressure limiting valve, 501-valve sleeve, 502-valve rod, 503-pressure limiting spring, 504-steel ball A, 505-throttling hole, 6-exhaust valve, 601-plug screw, 602-exhaust spring, 603-steel ball B, 7-transition block, 701-connecting hole, 8-sealing gasket, 9-positioning pin, 10-steel ball C, 11-steel ball D and 12-steel ball E.

Detailed Description

The utility model is further elucidated with reference to the drawings and the embodiments.

Example 1: as shown in fig. 1 to 8, a gear type oil transfer pump includes a pump body 1, a pump cover 2, a driving gear 3, a driven gear 4, a pressure limiting valve 5 and an exhaust valve 6; an accommodating cavity is formed in one side of the pump body 1, two central shafts 101 are arranged in the accommodating cavity, an oil drainage groove 102 is formed between the central shafts 101, and an oil inlet 103 and an oil outlet 104 are formed in the front side of the pump body 1; the driving gear 3 and the driven gear 4 are meshed with each other and are respectively and rotatably connected to the central shaft 101, a transition block 7 for connecting a driving shaft is arranged on the driving gear 3, and an oil suction cavity 107 and an oil discharge cavity 108 are arranged on two sides of the driving gear 3 and the driven gear 4; the oil inlet 103 is communicated with an oil suction cavity 107 through an oil inlet hole 105, and the oil outlet 104 is communicated with an oil discharge cavity 108 through an oil outlet hole 106; the pump cover 2 is connected to the pump body 1 in a sealing mode, a lubricating groove 201 is formed in the inner side of the pump cover 2, one end of the lubricating groove 201 is communicated with the oil unloading cavity 108, the other end of the lubricating groove 201 is communicated with the joint of the driven gear 4 and the central shaft 101, a lubricating hole 202 is formed in the pump cover 2, and the lubricating hole 202 is communicated into the oil unloading cavity 108; the two sides of the pump body 1 are respectively provided with a pressure limiting hole 109 and an exhaust hole 110, the pressure limiting hole 109 is communicated with the oil inlet 105, the exhaust hole 110 is communicated with the oil outlet 106, and the pressure limiting valve 5 and the exhaust valve 6 are respectively connected in the pressure limiting hole 109 and the exhaust hole 110; a sealing groove is formed in the upper opening of the accommodating cavity, and a sealing gasket 8 is arranged in the sealing groove; the pump body 1 on two sides of the containing cavity is connected with a positioning pin 9, and the pump cover 2 is inserted into the positioning pin 9 and connected to the pump body 1 through a bolt; the end part of the driving gear 3 is provided with a toothed caulking groove 301, the transition block 7 is in a cross-joint shape and is in interference fit with the caulking groove 301, and the middle part of the transition block 7 is provided with a connecting hole 701 for installing a driving shaft; the pressure limiting hole 109 is communicated with the oil inlet hole 105 and the oil outlet hole 106; the pressure limiting valve 5 comprises a valve sleeve 501, a valve rod 502, a pressure limiting spring 503 and a steel ball A504, the valve sleeve 501 is in threaded and sealed connection with the pressure limiting hole 109, a plurality of throttling holes 505 are formed in the valve sleeve 501, and the throttling holes 505 are located at the intersection of the pressure limiting hole 109 and the oil inlet 105; the valve rod 502 is connected to the inner wall of the valve sleeve 501 in a sliding mode, the steel ball A504 is in interference fit with the tail end of the valve sleeve 501, and the pressure limiting spring 503 is located in the valve sleeve 501 between the valve rod 502 and the steel ball A504; the exhaust hole 110 is communicated with the oil inlet hole 105 and the oil outlet hole 106; the exhaust valve 6 comprises a screw plug 601, an exhaust spring 602 and a steel ball B603, the screw plug 601 is threaded and hermetically connected in the exhaust hole 110, the steel ball B603 abuts against a step at the joint of the exhaust hole 110 and the oil outlet 106, and the exhaust spring 602 is positioned between the screw plug 601 and the steel ball B603; two ends of the pump body are provided with a process hole a111, a process hole b112 and a process hole c 113; the process hole a111 is communicated with the oil inlet hole 105, the process hole b112 is communicated with the oil outlet hole 106, the process hole C113 is communicated with the pressure limiting hole 109, and the process hole a111, the process hole b112 and the process hole C113 are respectively in interference fit with a steel ball C10, a steel ball D11 and a steel ball E12; a concave part 114 is arranged at the front side of the pump body 1, and rib plates 115 which are staggered transversely and longitudinally are arranged in the concave part 114; the rear side of the pump body 1 is provided with a plurality of light-weight grooves 116; the number of teeth of the driving gear 3 and the driven gear 4 is ten.

According to the utility model, the oil drainage groove 102 is formed between the two central shafts 101, so that the closed high-pressure oil between the driving gear 3 and the driven gear 4 is communicated with the oil suction cavity 107 or the oil discharge cavity 108, and the problem of oil trapping is solved; the oil inlet 103 and the oil outlet 104 are arranged on the same side of the pump body 1, so that the mounting space is saved, the mounting is convenient, and the problem of interference with other surrounding parts is solved; the inner side of the pump cover 2 is provided with a lubricating groove 201 which is convenient for the lubrication of the gear, and in addition, a lubricating hole 202 is convenient for oil outlet lubrication of other parts; the pressure limiting valve 5 can accurately control oil pressure to prevent overload, and the service life of the gear pump is prolonged; the exhaust valve 6 can effectively prevent air from entering the gear pump to cause cavitation erosion; the driving shaft is connected with the driving gear 3 through a cross-shaped transition block 7, so that the transmission is stable and reliable; the two ends of the pump body 1 are provided with a process hole a111, a process hole b112 and a process hole c113, so that the assembly of the gear pump is facilitated; the front side of the pump body 1 is provided with a concave part 114, so that the weight of the pump body 1 can be reduced, and rib plates 115 which are staggered transversely and longitudinally are arranged in the concave part 114, so that the heat dissipation of the gear pump is facilitated; the rear side of the pump body 1 is provided with a plurality of grooves 116, so that the weight of the gear pump is effectively reduced; the teeth of the driving gear 3 and the driven gear 4 are ten, so that the pressure of the oil relief cavity 108 only acts in the range from one tooth to two teeth, the radial unbalanced force is reduced, and the abrasion of the gears and the central shaft 101 is small.

The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A gear type oil transfer pump is characterized in that: comprises a pump body (1), a pump cover (2), a driving gear (3), a driven gear (4), a pressure limiting valve (5) and an exhaust valve (6); an accommodating cavity is formed in one side of the pump body (1), two central shafts (101) are arranged in the accommodating cavity, an oil drainage groove (102) is formed between the central shafts (101), and an oil inlet (103) and an oil outlet (104) are formed in the front side of the pump body (1);

the driving gear (3) and the driven gear (4) are mutually meshed and are respectively and rotatably connected to the central shaft (101), a transition block (7) used for connecting a driving shaft is arranged on the driving gear (3), and an oil suction cavity (107) and an oil discharge cavity (108) are formed in two sides of the driving gear (3) and the driven gear (4); the oil inlet (103) is communicated with an oil suction cavity (107) through an oil inlet hole (105), and the oil outlet (104) is communicated with an oil discharge cavity (108) through an oil outlet hole (106);

the pump cover (2) is connected to the pump body (1) in a sealing mode, a lubricating groove (201) is formed in the inner side of the pump cover (2), one end of the lubricating groove (201) is communicated with the oil unloading cavity (108), the other end of the lubricating groove is communicated with the joint of the driven gear (4) and the central shaft (101), a lubricating hole (202) is formed in the pump cover (2), and the lubricating hole (202) is communicated into the oil unloading cavity (108);

the pressure limiting valve is characterized in that a pressure limiting hole (109) and an exhaust hole (110) are respectively arranged on two sides of the pump body (1), the pressure limiting hole (109) is communicated with the oil inlet hole (105), the exhaust hole (110) is communicated with the oil outlet hole (106), and the pressure limiting valve (5) and the exhaust valve (6) are respectively connected into the pressure limiting hole (109) and the exhaust hole (110).

2. The gear type oil transfer pump according to claim 1, characterized in that: a sealing groove is formed in the upper opening of the accommodating cavity, and a sealing gasket (8) is arranged in the sealing groove; the pump body (1) of holding chamber both sides is connected with locating pin (9), and pump cover (2) cartridge is in locating pin (9) and through bolted connection on the pump body (1).

3. The gear type oil transfer pump according to claim 2, characterized in that: the end of the driving gear (3) is provided with a toothed caulking groove (301), the transition block (7) is in a cross-shaped shape and is in interference fit in the caulking groove (301), and the middle of the transition block (7) is provided with a connecting hole (701) for installing a driving shaft.

4. The gear type oil transfer pump according to claim 1, characterized in that: the pressure limiting hole (109) is communicated with the oil inlet hole (105) and the oil outlet hole (106); the pressure limiting valve (5) comprises a valve sleeve (501), a valve rod (502), a pressure limiting spring (503) and a steel ball A (504), the valve sleeve (501) is in threaded connection with the pressure limiting hole (109) in a sealing mode, a plurality of throttling holes (505) are formed in the valve sleeve (501), and the throttling holes (505) are located at the intersection of the pressure limiting hole (109) and the oil inlet hole (105); the valve rod (502) is connected to the inner wall of the valve sleeve (501) in a sliding mode, the steel ball A (504) is in interference fit with the tail end of the valve sleeve (501), and the pressure limiting spring (503) is located in the valve sleeve (501) between the valve rod (502) and the steel ball A (504).

5. The gear type oil transfer pump according to claim 1, characterized in that: the exhaust hole (110) is communicated with the oil inlet hole (105) and the oil outlet hole (106); the exhaust valve (6) comprises a screw plug (601), an exhaust spring (602) and a steel ball B (603), the screw plug (601) is in threaded and sealed connection with the exhaust hole (110), the steel ball B (603) abuts against a step at the joint of the exhaust hole (110) and the oil outlet (106), and the exhaust spring (602) is located between the screw plug (601) and the steel ball B (603).

6. A gear type oil transfer pump according to claim 3, characterized in that: two ends of the pump body (1) are provided with a process hole a (111), a process hole b (112) and a process hole c (113); the process hole a (111) is communicated with the oil inlet hole (105), the process hole b (112) is communicated with the oil outlet hole (106), the process hole C (113) is communicated with the pressure limiting hole (109), and the process hole a (111), the process hole b (112) and the process hole C (113) are respectively in interference fit with a steel ball C (10), a steel ball D (11) and a steel ball E (12).

7. The gear type oil transfer pump according to claim 1, characterized in that: the front side of the pump body (1) is provided with a concave part (114), and rib plates (115) which are staggered transversely and longitudinally are arranged in the concave part (114).

8. The gear type oil transfer pump according to claim 1, characterized in that: the rear side of the pump body (1) is provided with a plurality of light-weighted grooves (116).

9. The gear type oil transfer pump according to claim 1, characterized in that: the number of teeth of the driving gear (3) and the driven gear (4) is ten.