Oil pump and compressor

Abstract

The oil pump comprises a pump body and a pressure adjusting assembly, the pump body comprises an oil inlet pipeline, an oil outlet pipeline and an oil pressure adjusting cavity, and the oil pressure adjusting cavity communicates with the oil inlet pipeline and the oil outlet pipeline; the pressure regulating assembly comprises a valve element, an elastic piece, a gasket and a fixing assembly. The fixing assembly is used for positioning the gasket, the elastic piece abuts against the valve element and the elastic piece correspondingly, and the valve element is switched between the first position and the second position. When the valve element is located at the first position, the oil inlet pipeline communicates with the oil outlet pipeline. And when the valve element is at the second position, the oil inlet pipeline and the oil outlet pipeline are disconnected. The oil pressure adjusting cavity is communicated with the oil inlet pipeline and the oil outlet pipeline, the pressure adjusting assembly is arranged in the oil pressure adjusting cavity, when the oil pressure in the oil outlet pipeline is too large, oil enters the oil pressure adjusting cavity to extrude the pressure adjusting assembly, and the flow and the oil pressure are adjusted by adjusting the compression amount of the spring. The adjusting assembly and the oil pump are integrated in function, and therefore the advantages of being flexible in adjustment, optimized in cost, improved in reliability and the like are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of oil pumps, and in particular to an oil pump and a compressor. Background Art

[0002] An oil pump usually consists of a pump body, a drive device and a delivery pipeline. The power generated by a mechanical or electric device moves the piston, impeller or screw and other components in the pump body, thereby generating negative or positive pressure, so that the liquid is sucked in or pushed out and delivered to the target location.

[0003] However, in the prior art, the oil pump is usually designed to be a non-adjustable oil pressure pump. To ensure the normal operation of the unit, a separate pressure regulating device needs to be added. When adding a separate pressure regulating device, first, the design and installation are complicated, and the installation process increases the workload; second, there are many parts and the cost is higher; third, there are many leakage points, and there is a risk of system uncleanliness.

[0004] Therefore, it is necessary to design an oil pump with high integration and flexible adjustment. Utility Model Content

[0005] The present application provides an oil pump and a compressor with high integration and flexible adjustment.

[0006] According to a first aspect of an embodiment of this specification, there is provided an oil pump, comprising:

[0007] A pump body, comprising an oil inlet pipeline, an oil outlet pipeline and an oil pressure regulating chamber, wherein the oil pressure regulating chamber is respectively connected to the oil inlet pipeline and the oil outlet pipeline;

[0008] A pressure regulating assembly, comprising a valve core, an elastic member, a gasket and a fixing assembly; the fixing assembly is used to position the gasket, the elastic member abuts against the valve core and the elastic member respectively, and the valve core switches between a first position and a second position;

[0009] Wherein, when the valve core is in the first position, the oil inlet pipeline and the oil outlet pipeline are connected; when the valve core is in the second position, the oil inlet pipeline and the oil outlet pipeline are disconnected.

[0010] Furthermore, the oil pressure regulating chamber includes a first chamber and a second chamber, the first chamber and the second chamber are connected and the radial width of the first chamber is smaller than the radial width of the second chamber; the connecting end of the first chamber and the second chamber is provided with a step surface.

[0011] Further, the valve core, the elastic member, the gasket and the fixing assembly are sequentially arranged in the oil pressure regulating chamber from the inside to the outside;

[0012] The oil inlet pipeline and the oil outlet pipeline are arranged on both sides of the oil pressure regulating chamber and are arranged in parallel with respect to the oil pressure regulating chamber.

[0013] Furthermore, the oil pressure regulating chamber is provided with a low-pressure flow channel port connected to the oil inlet pipe and a high-pressure flow channel port connected to the oil outlet pipe; the low-pressure flow channel port is located on the inner wall of the second chamber, and the high-pressure flow channel port is located on the inner wall of the first chamber.

[0014] Further, the valve core comprises a base, a first portion and a second portion, the first portion and the second portion are symmetrically arranged with respect to the base, and the radial width of the base is greater than the radial width of the first chamber and smaller than the radial width of the second chamber;

[0015] When the valve core is in the second position, the base body abuts against the step surface.

[0016] Further, the radial width of the first portion is smaller than the radial width of the second chamber;

[0017] The shape of the second portion is adapted to the shape of the first chamber, and a plurality of notches are arranged on the side of the second portion, at least one of the notches is arranged toward the high-pressure flow channel opening.

[0018] Furthermore, the height of the notch is equal to the height of the first chamber.

[0019] Further, the fixing assembly includes a rotating nut and an adjusting screw, one end of the rotating nut is accommodated in the oil pressure regulating chamber and is used to position the gasket, and the other end is arranged outside the end of the pump body and is rotatably connected to the rotating nut;

[0020] The rotating nut, the adjusting screw, the valve core and the elastic member are coaxially arranged.

[0021] Furthermore, the pump body further comprises a sealing plug, which is fixed on the rotating nut and is located outside the end of the pump body;

[0022] The pump body further comprises a sealing member, and the sealing member is arranged between the rotating nut and the pump body.

[0023] According to a second aspect of an embodiment of this specification, a compressor is provided, comprising a main engine, a gear box, an oil tank and the oil pump as described in the first aspect above, wherein one end of the pump body is sealedly connected to the gear box, and the other end is connected to the oil tank.

[0024] The present application has the following beneficial effects: the oil pressure regulating chamber is connected to the oil inlet pipeline and the oil outlet pipeline respectively, and a pressure regulating component is arranged in the oil pressure regulating chamber. When the oil pressure in the oil outlet pipeline is too high, the oil enters the oil pressure regulating chamber to squeeze the pressure regulating component, that is, the flow rate and oil pressure are adjusted by adjusting the compression amount of the spring. In this embodiment, the regulating component is integrated with the oil pump function, so it has the advantages of flexible adjustment, cost optimization, and improved reliability.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0027] Figure 1 It is a structural schematic diagram of the oil pump in the embodiment of the present application;

[0028] Figure 2 is a partial cross-sectional view of an oil pump in an embodiment of the present application;

[0029] Figure 3 It is a front view of the compressor in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100-oil pump; 200-main engine; 300-gear box; 400-oil tank;

[0032] 10- pump body; 11- oil inlet pipe; 12- oil outlet pipe; 131- first chamber; 132- second chamber; 133- step surface; 134- low-pressure flow channel outlet; 135- high-pressure flow channel outlet;

[0033] 20-pressure regulating assembly; 21-valve core; 211-base; 212-first part; 213-second part; 22-elastic member; 23-gasket; 24-rotating nut; 25-adjusting screw; 26-sealing plug; 27-sealing member. DETAILED DESCRIPTION

[0034] Reference Figure 1-3As shown, this embodiment discloses an oil pump 100, which includes a pump body 10 and a pressure regulating assembly 20. The pump body 10 includes an oil inlet pipeline 11, an oil outlet pipeline 12 and an oil pressure regulating chamber, and the oil pressure regulating chamber is respectively connected to the oil inlet pipeline 11 and the oil outlet pipeline 12; the pressure regulating assembly 20 is accommodated in the oil pressure regulating chamber, and includes a valve core 21, an elastic member 22, a gasket 23 and a fixing assembly; the fixing assembly is used to position the gasket 23, the elastic member 22 is respectively in contact with the valve core 21 and the elastic member 22, and the valve core 21 switches between a first position and a second position.

[0035] When the valve core 21 is in the first position, the oil inlet pipeline 11 and the oil outlet pipeline 12 are connected; when the valve core 21 is in the second position, the oil inlet pipeline 11 and the oil outlet pipeline 12 are disconnected. In this way, the oil pressure regulating chamber is connected to the oil inlet pipeline 11 and the oil outlet pipeline 12 respectively, and a pressure regulating component 20 is set in the oil pressure regulating chamber. When the oil pressure in the oil outlet pipeline 12 is too large, the oil enters the oil pressure regulating chamber to squeeze the pressure regulating component 20, that is, the flow rate and oil pressure are adjusted by adjusting the compression amount of the spring. In this embodiment, the regulating component is integrated with the oil pump 100, so it has the advantages of flexible adjustment, cost optimization, and improved reliability.

[0036] Specifically:

[0037] The oil pressure regulating chamber includes a first chamber 131 and a second chamber 132. The first chamber 131 and the second chamber 132 are connected and the radial width of the first chamber 131 is smaller than the radial width of the second chamber 132. A step surface 133 is provided at the connecting end of the first chamber 131 and the second chamber 132. In this embodiment, the valve core 21, the elastic member 22, the gasket 23 and the fixing assembly are sequentially arranged in the second chamber 132 from the inside to the outside.

[0038] Furthermore, the oil inlet pipe 11 and the oil outlet pipe 12 are arranged on both sides of the oil pressure regulating chamber and are arranged in parallel with the oil pressure regulating chamber. The oil pressure regulating chamber is provided with a low-pressure flow channel port 134 connected to the oil inlet pipe 11 and a high-pressure flow channel port 135 connected to the oil outlet pipe 12; the low-pressure flow channel port 134 is located on the inner wall of the second chamber 132, and the high-pressure flow channel port 135 is located on the inner wall of the first chamber 131. Specifically, two through grooves can be provided on the side wall of the pump body 10, one through groove connects the high-pressure flow channel port 135 with the oil outlet pipe 12, and the other through groove connects the low-pressure flow channel port 134 with the oil inlet pipe 11. Of course, in order to prevent the oil from flowing out from the inside of the pump body 10 through the through groove, one side of the through groove is closed so that the oil can only flow along the other side of the through groove, that is, between the high-pressure flow channel port 135, the oil outlet pipe 12 or the high-pressure flow channel port 135.

[0039] The valve core 21 includes a base 211, a first portion 212, and a second portion 213. The first portion 212 and the second portion 213 are symmetrically arranged about the base 211. The radial width of the base 211 is greater than the radial width of the first chamber 131 and smaller than the radial width of the second chamber 132. In this way, the base 211 can be flexibly adjusted in the second chamber 132 without entering the first chamber 131.

[0040] When the valve core 21 is in the second position, the base 211 abuts against the step surface 133. In this way, the base 211 abuts against the step surface 133 to achieve position limiting, thereby preventing the second part 213 from colliding with the bottom of the oil pressure regulating chamber when it is extended and retracted, thereby affecting its service life and further affecting the sealing performance between the second part 213 and the first chamber 131.

[0041] In this embodiment, the radial width of the first portion 212 is smaller than the radial width of the second chamber 132. In this way, when there is a gap between the first portion 212 and the second chamber 132, the low-pressure flow channel opening 134 can be kept open.

[0042] In addition, the shape of the second part 213 is adapted to the shape of the first chamber 131, and a plurality of notches (not shown) are provided on the side of the second part 213, and at least one notch is provided toward the high-pressure flow channel port 135. In this way, the contact area between the high-pressure oil and the second part 213 can be increased, and the second part 213 can be easily ejected from the first chamber 131. In addition, the plurality of notches are arranged symmetrically, so as to ensure that the force on the second part 213 is uniform during the movement, and the movement is stable.

[0043] Preferably, the height of the notch is equal to the height of the first chamber 131. In this way, when the high-pressure oil squeezes the second part 213, when the second part 213 starts to move upward, the high-pressure oil can flow into the second chamber 132 through the notch to relieve the oil pressure, which is highly efficient. Of course, the height of the notch can also be smaller than the height of the first chamber 131, and the corresponding oil pressure needs to be increased, and the moving distance of the second part 213 needs to be increased, so that the high-pressure oil can flow into the second chamber 132 through the notch.

[0044] The fixing assembly includes a rotating nut 24 and an adjusting screw 25, one end of the rotating nut 24 is accommodated in the oil pressure regulating chamber and is used to position the gasket 23, and the other end is arranged outside the end of the pump body 10 and is rotatably connected to the rotating nut 24. In this way, the elastic member 22 at the end of the gasket 23 can be pushed to move toward the valve core 21 or away from the valve core 21 by rotating the adjusting screw 25, thereby changing the elastic force between the valve core 21 and the elastic member 22, and changing the oil pressure that pushes the valve core 21.

[0045] In addition, in another achievable manner, the fixing assembly may also be directly fixed to the end of the pump body 10 , and the oil pressure regulating chamber may be isolated from the outside by a seal 27 to simplify the structure of the oil pump.

[0046] The pump body 10 further includes a sealing plug 26, which is fixed on the rotating nut 24 and is located outside the end of the pump body 10. In this way, the oil can be prevented from flowing out from the gap between the rotating nut 24 and the adjusting screw 25.

[0047] The rotating nut 24, the adjusting screw 25, the valve core 21 and the elastic member 22 are coaxially arranged. In this way, the overall internal structure of the oil pump 100 can be made more compact and the space utilization rate can be high.

[0048] The pump body 10 further includes a seal 27, which is disposed between the rotating nut 24 and the pump body 10. Thus, the seal 27 prevents oil from leaking from the rotating nut 24 and the pump body 10. The seal 27 may be an O-ring.

[0049] In this embodiment, when the force of the oil outlet pipeline 12 acting on the valve core 21 is greater than the force of the oil in the oil inlet pipeline 11 acting on the valve core 21 and the spring force on the valve core 21, the valve core 21 moves upward, the oil outlet pipeline 12 and the oil inlet pipeline 11 are connected, and pressure relief begins, and part of the oil in the oil outlet pipeline 12 flows to the oil inlet pipeline 11, thereby reducing the pressure of the oil outlet pipeline 12. In addition, when the force of the oil in the oil outlet pipeline 12 acting on the valve core 21 is less than the force of the oil in the oil inlet pipeline 11 acting on the valve core 21 and the spring force on the valve core 21, the valve core 21 moves downward, the oil outlet pipeline 12 and the oil inlet pipeline 11 are not connected, and the oil pump 100 works normally.

[0050] This embodiment also discloses a compressor, including a main engine 200, a gear box 300, an oil tank 400 and the above-mentioned oil pump 100, one end of the pump body 10 is sealed and connected to the gear box 300, and the other end is connected to the oil tank 400.

[0051] Specifically, the pump body 10 is also provided with a first gear shaft and a second gear shaft meshing with each other, wherein the first gear shaft is connected to the shaft of the main engine 200 through a tapered hole, and then the first gear shaft and the second gear shaft are driven to rotate by the shaft rotation of the main engine 200, and the teeth in the first gear shaft and the second gear shaft continuously mesh and withdraw from meshing. When meshing, the volume of the oil discharge pipeline becomes smaller, and when withdrawing from meshing, the volume of the oil inlet pipeline 11 increases. The tooth tops on the first gear shaft and the second gear shaft, the pump body 10 and the end cover separate the suction and discharge chambers, and there are many independent motion volumes between the suction and discharge chambers, ensuring that the oil leaves the suction chamber before entering the discharge chamber.

Claims

1. An oil pump, characterized in that: include: A pump body (10) comprises an oil inlet pipeline (11), an oil outlet pipeline (12) and an oil pressure regulating chamber, wherein the oil pressure regulating chamber is respectively connected to the oil inlet pipeline (11) and the oil outlet pipeline (12); A pressure regulating assembly (20), comprising a valve core (21), an elastic member (22), a gasket (23) and a fixing assembly; the fixing assembly is used to position the gasket (23); the elastic member (22) abuts against the valve core (21) and the elastic member (22) respectively; the valve core (21) switches between a first position and a second position; Wherein, when the valve core (21) is in the first position, the oil inlet pipeline (11) and the oil outlet pipeline (12) are connected; when the valve core (21) is in the second position, the oil inlet pipeline (11) and the oil outlet pipeline (12) are disconnected.

2. The oil pump according to claim 1, characterized in that: The oil pressure regulating chamber comprises a first chamber (131) and a second chamber (132); the first chamber (131) and the second chamber (132) are connected and the radial width of the first chamber (131) is smaller than the radial width of the second chamber (132); and a step surface (133) is provided at the connecting end of the first chamber (131) and the second chamber (132).

3. The oil pump according to claim 2, characterized in that: The valve core (21), the elastic member (22), the gasket (23) and the fixing assembly are arranged in sequence from the inside to the outside in the oil pressure regulating chamber; The oil inlet pipeline (11) and the oil outlet pipeline (12) are arranged on both sides of the oil pressure regulating chamber and are arranged in parallel with respect to the oil pressure regulating chamber.

4. The oil pump according to claim 2, characterized in that: The oil pressure regulating chamber is provided with a low-pressure flow channel opening (134) connected to the oil inlet pipeline (11) and a high-pressure flow channel opening (135) connected to the oil outlet pipeline (12); the low-pressure flow channel opening (134) is located on the inner wall of the second chamber (132), and the high-pressure flow channel opening (135) is located on the inner wall of the first chamber (131).

5. The oil pump according to claim 2, characterized in that: The valve core (21) comprises a base (211), a first portion (212) and a second portion (213), wherein the first portion (212) and the second portion (213) are symmetrically arranged with respect to the base (211), and a radial width of the base (211) is greater than a radial width of the first chamber (131) and smaller than a radial width of the second chamber (132); When the valve core (21) is in the second position, the base (211) abuts against the step surface (133).

6. The oil pump according to claim 5, characterized in that: The radial width of the first portion (212) is smaller than the radial width of the second chamber (132); The shape of the second portion (213) is adapted to the shape of the first chamber (131), and a plurality of notches are provided on the side of the second portion (213), at least one of the notches being arranged toward the high-pressure flow channel opening (135).

7. The oil pump according to claim 6, characterized in that: The height of the notch is equal to the height of the first chamber (131).

8. The oil pump according to claim 1, characterized in that The fixing assembly comprises a rotating nut (24) and an adjusting screw (25); one end of the rotating nut (24) is accommodated in the oil pressure regulating chamber and is used to position the gasket (23); the other end is arranged outside the end of the pump body (10) and is rotatably connected to the rotating nut (24); The rotating nut (24), the adjusting screw (25), the valve core (21) and the elastic member (22) are coaxially arranged.

9. The oil pump according to claim 8, characterized in that The pump body (10) further comprises a sealing plug (26), wherein the sealing plug (26) is fixed on the rotating nut (24) and is located outside the end of the pump body (10); The pump body (10) further comprises a sealing member (27), wherein the sealing member (27) is arranged between the rotating nut (24) and the pump body (10).

10. A compressor, characterized in that: It comprises a main engine (200), a gear box (300), an oil tank (400) and an oil pump as claimed in any one of claims 1 to 9, wherein one end of the pump body (10) is sealedly connected to the gear box (300), and the other end is connected to the oil tank (400).

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