CN209977679U

CN209977679U - Oil pump

Info

Publication number: CN209977679U
Application number: CN201920214470.6U
Authority: CN
Inventors: 魏水源
Original assignee: NANJING TENGYUAN MACHINE MANUFACTURING Co Ltd; Nanjing Jiayuan Technology Equipment Manufacturing Co Ltd
Current assignee: NANJING TENGYUAN MACHINE MANUFACTURING Co Ltd; Nanjing Jiayuan Technology Equipment Manufacturing Co Ltd
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-01-21
Anticipated expiration: 2029-02-20

Abstract

The utility model discloses an oil pump, including the pump body, pump cover, inner rotor, external rotor and rotor spindle, the pump cover on open and to have inlet port, play oil groove and oil outlet, the inlet port communicates with each other with the inlet port, the oil outlet communicates with each other with a play oil groove, inner rotor and external rotor are at rotor intracavity rotation, inhale the rotor chamber and pump out from a play oil groove and oil outlet with machine oil from inlet port and inlet port. The utility model has the advantages that: the utility model discloses a from the pump cover oil feed and produce oil, shortened the oil circuit of machine oil business turn over oil pump, improved the performance of oil pump, the diesel engine can obtain machine oil fast, has prolonged the life of diesel engine.

Description

Oil pump

Technical Field

The utility model relates to an oil pump.

Background

With the wide application of the internal combustion engine in various fields, the speed increasing and speed changing range of the internal combustion engine is greatly widened, namely the performance and the quality are greatly improved. Therefore, modern internal combustion engines put higher requirements on the performance of the main part of the lubricating system, namely the oil pump, and currently, small and medium-sized internal combustion engines in China generally adopt the internally meshed cycloid rotor oil pump. In long-term production practice, the rotor type oil pump for the lubricating system of the internal combustion engine is found to be easy to have factors of breaking a sealing paper pad, long oil absorption time, inconvenient installation and the like in the use process, and influences the service life of the oil pump and the performance of the diesel engine.

The applicant makes repeated research and tests on how to improve the performance and the effective service life of the oil pump, and finds that in the long-term working process of the oil pump, the sealing paper pad can slowly decay and lose efficacy, so that the oil pump leaks oil, the pressure flow of the oil pump is small, and the oil pump is damaged. The existing rotor oil pump usually sets up oil inlet tank and oil outlet tank in the outside of rotor (even when keeping away from one side of diesel engine during the time of consuming), and oil absorption in-process, machine oil need can reach the engine through a big return circuit, has just so caused the oil pump to inhale oil time overlength, has aggravated the wearing and tearing when the diesel engine starts, has influenced the life of diesel engine. The existing rotor oil pump is generally positioned and assembled by a positioning pin in the assembly process, so that the relative position of a pump shaft and a rotor cavity can not be well kept, and the oil pump is not very flexible. The oil inlet groove and the oil outlet groove are arranged on the pump body of the conventional oil pump, so that the thickness of the oil inlet groove and the oil outlet groove needs to be reserved on the pump body while the depth of a rotor cavity is ensured, the overall thickness of the oil pump is greatly increased, the thickness of the oil pump is large, the oil pump can be mounted by disassembling a flywheel of a diesel engine, and the procedure is very complicated and inconvenient.

Disclosure of Invention

The utility model aims at providing an oil pump, the oil circuit of solving among the prior art machine oil is long to lead to the machine oil pump to inhale oil for a long time, and the technical defect that diesel engine life is short is worn and torn when aggravating the diesel engine start-up that uses the machine oil pump.

In order to solve the above problems, the technical proposal adopted by the utility model is that: an oil pump comprises a pump body, a pump cover, an inner rotor, an outer rotor and a rotor shaft, wherein the rotor shaft is arranged on the inner rotor, the outer rotor is sleeved on the inner rotor, one side of the pump cover, which is close to the pump body, is a pump body mounting surface, one side of the pump body, which is close to the pump cover, is a pump cover mounting surface, the pump body mounting surface is attached to the pump cover mounting surface, the pump body is detachably mounted with the pump cover, the pump body is protruded towards the direction away from the pump cover to form a pump body boss, the pump body is inwards concave towards the direction away from the pump cover to form a rotor cavity with a circular cross section, the outer rotor is arranged in the rotor cavity, a rotor shaft positioning hole penetrating through the two sides of the pump body is formed in the pump cover, the rotor shaft positioning hole and the rotor cavity are eccentrically arranged, one end, which is far away from the inner rotor, of the rotor shaft The structure, pump cover on open and to have oil feed tank, inlet port, go out oil groove and oil outlet, the inlet port communicate with each other with the inlet tank, the oil outlet communicates with each other with the oil groove, inner rotor and outer rotor rotate in the rotor chamber, inhale the rotor chamber and pump out from the oil groove and the oil outlet with machine oil from inlet port and inlet tank. The utility model provides an inlet port and oil outlet set up on the pump cover, because the thickness of pump cover is far less than the thickness of the pump body, so machine oil is absorbed the rotor chamber from the inlet port and is compared from the oil outlet by the oil circuit that pumps in prior art machine oil from advancing on the body and go out the rotor chamber shorter, so the utility model provides a diesel engine is when starting, and machine oil can be quick is absorbed the rotor chamber, uses the utility model discloses a can be quick obtain machine oil of diesel engine, reduced the wearing and tearing of diesel engine, prolonged the life of diesel engine.

As a further improvement, the pump body installation face towards the protruding first pump cover boss that forms of direction of the pump body, the diameter of first pump cover boss equal with the diameter in rotor chamber, when pump body installation face and pump cover installation face laminated mutually, first pump cover boss stretch into the rotor intracavity. The utility model provides a first pump cover boss stretches into the rotor intracavity, and the face of cylinder of first pump cover boss is laminated mutually with the face of cylinder in rotor chamber, has strengthened the leakproofness of the pump body and pump cover.

As a further improvement of the utility model, the thickness of inner rotor and outer rotor equal, the bottom surface in rotor chamber be first rotor installation face, the face relative with first rotor installation face is second rotor installation face on the first pump cover boss, first rotor installation face and second rotor installation face between the distance equal with the thickness of outer rotor. The utility model discloses well first rotor installation face and second rotor installation face are spacing from the internal rotor of both ends of inner rotor and external rotor respectively and external rotor, prevent the removal of inner rotor and external rotor in the axial.

As the utility model discloses a further improvement, pump cover installation face in concave annular seal groove that forms, the center line coincidence in seal groove and rotor chamber, the seal groove in be provided with O shape sealing washer. The utility model discloses set up O shape sealing washer, the leakproofness of the further reinforcing pump body and pump cover prevents the oil leak, ensures that rotor intracavity oil pressure is stable, makes the utility model discloses sustainable suction and pump machine oil.

As a further improvement, the O-shaped sealing ring is made of oil-proof high-temperature-resistant nitrile rubber. Not only improves the sealing performance, but also prolongs the service life of the oil pump.

To sum up, the beneficial effects of the utility model are that: the utility model discloses a from the pump cover oil feed and produce oil, shortened the oil circuit of machine oil business turn over oil pump, improved the performance of oil pump, the diesel engine can obtain machine oil fast, has prolonged the life of diesel engine.

Drawings

Fig. 1 is a bottom view reflecting the pump cover of the present invention.

Fig. 2 is a cross-sectional view a-a of fig. 1.

Fig. 3 is an isometric view of fig. 2.

Fig. 4 is a plan view reflecting the pump cover of the present invention.

Fig. 5 is a schematic view showing a three-dimensional structure of the pump body according to the present invention.

Fig. 6 is a schematic perspective view showing another angle of the pump body according to the present invention.

Fig. 7 is a bottom view reflecting the present invention.

Fig. 8 is a sectional view B-B of fig. 7.

Fig. 9 is an isometric view of fig. 8.

Fig. 10 is a schematic perspective view of the present invention.

Wherein: 1. a pump body; 2. a pump cover; 3. a pump body mounting surface; 4. a pump cover mounting surface; 5. a pump body boss; 6. a rotor cavity; 7. a rotor shaft positioning hole; 8. an oil inlet groove; 9. an oil inlet hole; 10. an oil outlet groove; 11. an oil outlet hole; 12. a first pump cover boss; 13. a first rotor mounting surface; 14. a second stator mounting surface; 15. a sealing groove; 16. an internal combustion engine mounting surface; 17. a first fixing hole; 18. a second fixing hole; 19. an oil inlet pipeline; 20. an oil outlet pipeline; 21. a third fixing hole; 22. an annular groove; 23. and a second pump cover boss.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

The oil pump shown in fig. 7-10 comprises a pump body 1, a pump cover 2, an inner rotor (not shown in the figure), an outer rotor (not shown in the figure) and a rotor shaft (not shown in the figure), wherein the rotor shaft is arranged on the inner rotor and coincided with the central line of the inner rotor, the utility model discloses preferred rotor shaft is made with inner rotor integrated into one piece, the outer rotor sleeve is established on the inner rotor, one side of the pump cover 2 close to the pump body 1 is a pump body installation face 3, one side of the pump cover 2 far away from the pump body 1 is an internal combustion engine installation face 16 used for installing the pump cover 2 on an internal combustion engine, one side of the pump body 1 close to the pump cover 2 is a pump cover installation face 4, the pump body installation face 3 is laminated with the. The utility model discloses it has the first fixed orifices 17 that runs through its both sides to open on the pump body 1, pump cover 2 on open and have and run through its both sides and with the corresponding second fixed orifices 18 of first fixed orifices 17, will the utility model discloses when installing on the internal-combustion engine, the adoption passes first fixed orifices 17 and second fixed orifices 18 and install the pump body 1 and pump cover 2 simultaneously with internal-combustion engine screw-thread fit's bolt on the internal-combustion engine. The utility model discloses it has third fixed orifices 21 to open on the pump body 1, pump cover 2 on open and have the screw hole (not shown in the figure) corresponding with third fixed orifices 21 position, the utility model discloses an alternate in third fixed orifices 21 and with screw hole screw-thread fit's construction bolt realize the demountable installation of the pump body 1 and pump cover 2.

As shown in fig. 5 and 6, in the utility model discloses pump body 1 towards the direction protrusion that keeps away from pump cover 2 and form the cross section for circular shape pump body boss 5, pump body 1 on by pump cover installation face 4 towards the direction indent that keeps away from pump cover 2 and form the cross section for circular shape rotor chamber 6, the internal diameter of rotor chamber 6 be less than the diameter of pump body boss 5, and rotor chamber 6 extend to pump body boss 5 department (the degree of depth of rotor chamber 6 is greater than the thickness that pump body 1 does not extend into the part of pump body boss 5), the outer rotor set up in rotor chamber 6 and can rotate in rotor chamber 6.

As shown in fig. 1 to 4, the pump cover 2 is provided with rotor shaft positioning holes 7 penetrating through both sides thereof, the rotor shaft positioning hole 7 and the rotor cavity 6 are eccentrically arranged (namely, the central line of the rotor shaft positioning hole 7 is not collinear with the central line of the rotor cavity 6), one end of the rotor shaft, which is far away from the inner rotor, extends out of the rotor cavity 6 from the rotor shaft positioning hole 7 and is used for connecting a driving mechanism (which is the prior art and is not the improvement point of the utility model) for driving the inner rotor and the outer rotor to rotate in the rotor cavity 6, the pump cover 2 is provided with an oil inlet groove 8, an oil inlet hole 9, an oil outlet groove 10 and an oil outlet hole 11, the oil inlet hole 9 is communicated with the oil inlet groove 8, the oil outlet hole 11 is communicated with the oil outlet groove 10, the inner rotor and the outer rotor rotate in the rotor cavity 6, and engine oil is sucked into the rotor cavity 6 from the oil inlet hole 9 and the oil inlet groove 8 and pumped out from the oil outlet groove 10 and the oil outlet hole 11. The utility model discloses in oil feed tank 8 and play oil groove 10 set up on pump body installation face 3, and oil feed tank 8 with go out oil groove 10 and be located rotor shaft locating hole 7's both sides respectively, oil inlet 9 and oil outlet 11 set up on internal-combustion engine installation face 16, pump cover 2 in open the oil feed passageway 19 that has intercommunication oil feed tank 8 and oil inlet 9 and the oily passageway 20 of the play of intercommunication oil groove 10 and oil outlet 11, oil feed passageway 19 and the oily passageway 20 of a play all perpendicular with the central line of rotor shaft locating hole 7, the utility model discloses an offer oil feed pipe 19 and oil outlet 20, can set up oil feed port 9 and oil outlet 11's position on pump cover 2 and lean on border department, the rotor shaft is kept away from to oil feed port 9 and oil outlet 11's position promptly.

The utility model discloses pump body installation face 3 towards the protruding first pump cover boss 12 that forms of direction of the pump body 1, the diameter of first pump cover boss 12 equal with the diameter in rotor chamber 6, when pump body installation face 3 is laminated with pump cover installation face 4 mutually, first pump cover boss 12 stretch into in the rotor chamber 6, and the face of cylinder of first pump cover boss 12 laminate with the inner wall in rotor chamber 6 mutually, the utility model discloses well first pump cover boss 12 is laminated with rotor chamber 6 intact, and the leakproofness reinforcing of the pump body 1 and pump cover 2 prevents the oil leak at the junction of the pump body 1 and pump cover 2. The utility model discloses in the thickness of inner rotor and outer rotor equal, the bottom surface of rotor chamber 6 be first rotor installation face 13, the face relative with first rotor installation face 13 on the first pump cover boss 12 is second rotor installation face 14, first rotor installation face 13 and second rotor installation face 14 between the distance equal with the thickness of outer rotor, when the pump body 1 covers with pump cover 2 mutually, two terminal surfaces of outer rotor support by first rotor installation face 13 and second rotor installation face 14 respectively, prevent inner rotor and outer rotor axial displacement in rotor chamber 6, the utility model discloses in rotor shaft locating hole 7 set up on second rotor installation face 14 and, oil feed tank 8 and play oil groove 10 also all set up on second rotor installation face 14. The utility model discloses in internal-combustion engine installation face 16 form the cross section towards the direction protrusion of the distant memory pump body 1 and be circular shape second pump cover boss 23, second pump cover boss 23 go up the indent and become ring channel 22, second pump cover boss 23 and rotor shaft locating hole 7 coaxial line.

The utility model discloses pump cover installation face 4 in the annular seal groove 15 of concave formation, the central line coincidence in seal groove 15 and rotor chamber 6, seal groove 15 internal diameter be greater than rotor chamber 6's diameter, seal groove 15 in be provided with O shape sealing washer, O shape sealing washer and first pump cover boss 12 contactless, the utility model provides a first pump cover boss 12 and rotor chamber 6 cooperation, the location is realized in the installation of pump body 1 and pump cover 2, when making things convenient for the installation of pump body 1 and pump cover 2, improves sealing performance, the utility model provides a pump cover installation face 4 is sealed to pump body 1 and pump cover 2 with laminating mutually with pump body installation face 3, and O shape sealing washer is relocked and is carried out secondary seal, further improvement to pump body 1 and pump cover 2 the utility model discloses a sealing performance.

The utility model discloses when sharing, pump cover 2 is installed on the diesel engine, sets up the inboard of rotor (be close to one side of diesel engine promptly) with oil feed tank 8 and the oil outlet groove 10 of traditional oil pump originally in the rotor outside (keep away from one side of diesel engine promptly), has solved the few not enough factors in the aspect of traditional pump existence: one is that traditional oil pump sets up oil feed tank 8 and oil groove 10 in the outside of rotor, in operation, the rotor rotates, produce the negative pressure in the rotor chamber 6, machine oil is followed inlet port 9 and is inhaled rotor chamber 6, the rotor continues to rotate, machine oil flows to the oil outlet through the oil groove 10 that sets up in the rotor outside, thus, machine oil just reaches oil outlet 11 through a big return circuit from inlet port 9 inside the oil pump, the oil absorption time of oil pump has been prolonged, the diesel engine is in the start-up process, because adnexed machine oil is very few on the internals, so the diesel engine wearing and tearing are the severest when starting, and oil absorption time should be short the better when oil pump starts. In the utility model, the engine oil directly flows from the rotor cavity 6 to the oil outlet groove 10 and the oil outlet hole 9 from the oil inlet hole 9 through the oil inlet groove 8, the internal oil circuit of the engine oil pump is greatly shortened, the oil absorption time of the engine oil pump is greatly shortened, the performance of the engine oil pump is improved, and the engine oil is obtained in a short time when the diesel engine is started, so that the service life of the diesel engine is prolonged; secondly, it is traditional oil pump sets up oil feed tank 8 and oil outlet groove 10 in the outside of rotor, so the whole thickness of oil pump is very thick, need pull down the flywheel when dismouting oil pump, has brought a great deal of inconvenience, because the utility model provides an oil feed tank 8 and oil outlet groove 10 set up on pump cover 2 to reduce the whole thickness of oil pump, need not to pull down the flywheel during dismouting oil pump and just can operate, brought very big convenience.

In the existing rotor type oil pump, a sealing paper pad is generally used as a sealing ring, the sealing paper pad loses sealing performance after being soaked in engine oil for a long time, and even the sealing paper pad is broken under the high-pressure state of the engine oil pump, so that the oil pump leaks oil, and the pressure in the oil pump is insufficient. The utility model discloses set up a seal groove 15 in the outside of outer rotor, the inside sets up an O type sealing washer of being made by grease proofing high temperature resistant material butadiene acrylonitrile rubber, has not only improved sealing performance, has still improved the life of oil pump.

The existing rotor type oil pump is usually positioned by a positioning pin in the assembling process, the relative size of a pump shaft and an inner rotor cannot be well ensured by the structure, and then the flexibility of the oil pump cannot be ensured. The utility model discloses change present locating pin location into adopting first pump cover boss 12 location, wherein the thickness of first pump cover boss 12 sets up to 1mm, the utility model discloses a relative dimension of oil pump shaft and inner rotor can be guaranteed to the locate mode, and the flexibility of oil pump just can obtain guaranteeing, and the performance of oil pump also can improve.

Parts which are not specifically described in the above description are prior art or can be realized by the prior art. The specific embodiments of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the content of the claims of the present invention should be regarded as the technical scope of the present invention.

Claims

1. The utility model provides an oil pump, includes the pump body (1), pump cover (2), inner rotor, outer rotor and rotor shaft, the rotor shaft set up on the inner rotor, the outer rotor cover establish on the inner rotor, pump cover (2) be close to one side of pump body (1) for pump body installation face (3), one side that pump body (1) are close to pump cover (2) be pump cover installation face (4), pump body installation face (3) laminate mutually with pump cover installation face (4) and pump body (1) and pump cover (2) detachable installation, its characterized in that: the pump body (1) is protruded towards the direction far away from the pump cover (2) to form a pump body boss (5), a pump cover mounting surface (4) on the pump body (1) is recessed towards the direction far away from the pump cover (2) to form a rotor cavity (6) with a circular cross section, the outer rotor is arranged in the rotor cavity (6), the pump cover (2) is provided with rotor shaft positioning holes (7) penetrating through two sides of the pump cover, the rotor shaft positioning holes (7) and the rotor cavity (6) are eccentrically arranged, one end of the rotor shaft far away from the inner rotor extends out of the rotor cavity (6) from the rotor shaft positioning holes (7) to form a driving mechanism for connecting the inner rotor and the outer rotor to rotate in the rotor cavity (6), the pump cover (2) is provided with an oil inlet groove (8), an oil inlet hole (9), an oil outlet groove (10) and an oil outlet hole (11), the oil inlet hole (9) is communicated with the oil inlet groove (8), the oil outlet hole (11) is communicated with the oil outlet groove (10), the inner rotor and the outer rotor rotate in the rotor cavity (6), and engine oil is sucked into the rotor cavity (6) from the oil inlet hole (9) and the oil inlet groove (8) and pumped out from the oil outlet groove (10) and the oil outlet hole (11).

2. The oil pump according to claim 1, characterized in that: the pump body mounting surface (3) protrudes towards the pump body (1) to form a first pump cover boss (12), the diameter of the first pump cover boss (12) is equal to that of the rotor cavity (6), and when the pump body mounting surface (3) is attached to the pump cover mounting surface (4), the first pump cover boss (12) extends into the rotor cavity (6).

3. The oil pump according to claim 2, characterized in that: the thickness of the inner rotor is equal to that of the outer rotor, the bottom surface of the rotor cavity (6) is a first rotor mounting surface (13), the surface, opposite to the first rotor mounting surface (13), of the first pump cover boss (12) is a second rotor mounting surface (14), and the distance between the first rotor mounting surface (13) and the second rotor mounting surface (14) is equal to the thickness of the outer rotor.

4. The oil pump according to claim 3, characterized in that: the pump cover installation surface (4) is internally recessed to form an annular sealing groove (15), the center line of the sealing groove (15) and the center line of the rotor cavity (6) are overlapped, and an O-shaped sealing ring is arranged in the sealing groove (15).

5. The oil pump of claim 4, wherein: the O-shaped sealing ring is made of oil-proof high-temperature-resistant nitrile rubber.