Oil pump

Abstract

The utility model provides an oil pump. The oil pump comprises a pump body, a filter screen piece and a shell. The pump body is provided with a pump oil inlet. The shell is provided with a containing cavity and an oil return channel. The pump body and the filter screen piece are located in the containing cavity, and the pump oil inlet is located in the filter screen piece. And an outlet of the oil return channel is communicated with the pump oil inlet through the filter screen piece. By means of the arrangement, when medium oil in the oil return channel enters the pump body again, the filter screen piece can be continuously washed, impurities on the filter screen piece fall off, then the possibility that the impurities block the filter screen piece is reduced, the use efficiency of the filter screen piece is improved, the maintenance period is shortened, and the service life of the oil pump is prolonged.

Description

Technical Field

[0001] The present application relates to the field of oil supply equipment, and in particular to an oil pump. Background Art

[0002] With the rapid development of industrial technology, the technology of various engines is becoming more and more mature, and the scope of application is becoming more and more extensive. In order to ensure the good working efficiency of the engine, the supply system is usually required to assist the engine to work together. The oil supply pump, as an important component of the supply system, ensures the oil supply of the supply system.

[0003] In the prior art, in order to ensure that the oil entering the pump body has good quality, the oil in the oil pump usually needs to pass through a filter before entering the pump body, and then be pumped out after being pressurized. Since there are many impurities in diesel, the impurities in the oil will be filtered out by the filter when the oil passes through the filter. After the oil pump has been running for a long time, some impurities will be stuck on the filter, which will reduce the filtering efficiency of the filter and increase the pumping pressure of the oil pump, thereby reducing the pumping efficiency.

[0004] Therefore, it is necessary to provide an improved oil pump to solve some or all of the above problems. Utility Model Content

[0005] The present application provides an oil pump with a long service life.

[0006] The present application provides an oil pump, comprising a pump body, a filter element and a shell; the pump body is provided with a pump oil inlet; the shell is provided with a accommodating cavity and an oil return channel; the pump body and the filter element are located in the accommodating cavity, and the pump oil inlet is located in the filter element; the outlet of the oil return channel is connected to the pump oil inlet through the filter element.

[0007] Furthermore, at least a portion of the pump body is sleeved in the filter element; one end of the filter element is in sealing contact with the bottom of the shell, and the other end is in sealing contact with the outer wall of the pump body.

[0008] Furthermore, the shell includes a bottom wall and a boss; the boss is protruded from the bottom wall toward the pump body; and one end of the filter element is sealed and sleeved on the boss.

[0009] Furthermore, the accommodating chamber includes a connected oil return chamber and an oil storage chamber; the pump body is located in the oil storage chamber; the oil return chamber is located between the filter element and the inner wall of the shell; the outlet of the oil return channel is connected to the oil return chamber.

[0010] Furthermore, the oil return chamber extends from the front end to the rear end of the filter element, and the area of ​​the filter element covered by the oil return chamber is no more than one third of the total area of ​​the filter element.

[0011] Furthermore, the shell is provided with an oil inlet passage; the accommodating chamber includes an oil inlet chamber communicated with the oil inlet passage, and the oil inlet chamber is communicated with the oil storage chamber through the filter element.

[0012] Furthermore, the housing further comprises an oil outlet passage communicated with the pump body; and the inlet of the oil return passage is communicated with the oil outlet passage.

[0013] Furthermore, the housing includes a flow divider; the flow divider is connected to the pump body; and a portion of the oil return channel communicating with a portion of the oil outlet channel is arranged on the flow divider.

[0014] Furthermore, the oil return passage includes a first oil passage, a second oil passage and a third oil passage; the first oil passage is located in the diverter and is connected to the oil outlet passage; the second oil passage is arranged inside the shell and is connected between the first oil passage and the third oil passage; the third oil passage is located between the pump body and the shell and is connected to the pump oil inlet through the filter element.

[0015] Furthermore, the filter element includes a filter body and a reinforcement frame; the reinforcement frame is respectively arranged around the inner and outer sides and both ends of the filter body.

[0016] Compared with the prior art, the oil pump of the present application is provided with a filter element, and the pump oil inlet is located in the filter element, and the outlet of the return oil channel is connected with the pump oil inlet through the filter element, so that when the medium oil in the return oil channel enters the pump body again, the filter element can be continuously flushed, so that impurities on the filter element fall off, thereby reducing the possibility of impurities clogging the filter element, increasing the utilization efficiency of the filter element, reducing the maintenance cycle, and increasing the service life of the oil pump.

[0017] 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

[0018] 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.

[0019] Figure 1 It is a three-dimensional diagram of the oil pump of this application.

[0020] Figure 2 yes Figure 1 Cross-sectional view of the oil pump about AA.

[0021] Figure 3 It is a schematic diagram of the flow path of the medium oil in the oil pump of the present application.

[0022] Figure 4 yes Figure 2 A partial enlarged view of point B in the oil pump.

[0023] Figure 5 yes Figure 1 Exploded view of the oil pump.

[0024] Figure 6 yes Figure 5 A three-dimensional view of the filter element in the oil pump.

[0025] Figure 7 yes Figure 6 Cross-sectional view of the middle filter element about CC.

[0026] Explanation of the accompanying drawings: 1-pump body; 11-pump oil inlet; 2-filter element; 21-front end of the filter element; 22-rear end of the filter element; 23-filter body; 24-reinforcement skeleton; 241-first fixing ring; 242-second fixing ring; 243-third fixing ring; 244-reinforcement strip; 2441-inner strip; 2442-outer strip; 3-shell; 301-end cover; 302-upper shell; 303-lower shell; 31-accommodating chamber; 311-return oil chamber; 312-oil storage chamber; 313-oil inlet chamber; 32-return oil channel; 321-first oil channel; 322-second oil channel; 323-third oil channel; 33-bottom wall; 34-boss; 35-oil inlet channel; 36-oil outlet channel; 37-diverter. DETAILED DESCRIPTION

[0027] like Figures 1 to 3 As shown, the oil pump of the present application includes a pump body 1, a filter element 2 and a housing 3. The pump body 1 and the filter element 2 are both located in the housing 3, and the pump body 1 is used to increase the kinetic energy of the medium oil entering the housing 3, so that the medium oil flows out of the housing 3 faster and more. At least part of the pump body 1 is sleeved in the filter element 2, and the filter element 2 is used to filter impurities in the medium oil, so that the medium oil entering the pump body 1 has better quality.

[0028] The pump body 1 is provided with a pump oil inlet 11, and the pump oil inlet 11 is located in the filter element 2. The housing 3 includes a receiving chamber 31 and an oil return passage 32. The pump body 1 and the filter element 2 are both located in the receiving chamber 31, and the receiving chamber 31 is also used to receive medium oil. The oil return passage 32 is connected to the receiving chamber 31, and further, the outlet of the oil return passage 32 is connected to the pump oil inlet 11 through the filter element 2.

[0029] Such arrangement enables the medium oil in the return oil channel 32 to continuously flush the filter element 2 when it enters the pump body 1 again through the filter element 2, thereby flushing away the medium oil impurities on the filter element 2, reducing the possibility of impurities clogging the filter element 2, increasing the use efficiency of the filter element 2, reducing the maintenance cycle, and increasing the service life of the oil pump.

[0030] In one embodiment, the accommodating chamber 31 includes an oil return chamber 311, an oil storage chamber 312, and an oil inlet chamber 313. The oil storage chamber 312 is respectively connected to the oil return chamber 311 and the oil inlet chamber 313. Specifically, the medium oil refluxed in the oil pump of the present application first enters the oil return chamber 311, and the oil return chamber 311 is connected to the oil storage chamber 312 through the filter member 2. The pump body 1 is located in the oil storage chamber 312 to facilitate the medium oil in the oil storage chamber 312 to easily enter the pump body 1. The medium oil entering the oil pump from the outside first flows into the oil inlet chamber 313, and the oil inlet chamber 313 is connected to the oil storage chamber 312 through the filter member 2.

[0031] Furthermore, since the filter element 2 is located in the accommodating chamber 31, the accommodating chamber 31 can be divided into at least an oil return chamber 311, an oil storage chamber 312 and an oil inlet chamber 313 by the filter element 2. That is, the oil return chamber 311 is located between the filter element 2 and the inner wall of the housing 3, and the outlet of the oil return channel 32 is connected to the oil return chamber 311, so that the refluxed medium oil can first enter the oil return chamber 311.

[0032] In one embodiment, in order to make the refluxed medium oil flush the impurities on the filter element 2 more thoroughly, the oil return chamber 311 extends from the front end 21 of the filter element 2 to the rear end 22 of the filter element 2, that is, in the circumferential direction of the filter element 2, part of the circumferential surface of the filter element 2 is covered by the oil return chamber 311. Furthermore, the area of ​​the filter element 2 covered by the oil return chamber 311 is not greater than one third of the total area of ​​the filter element 2. Such a configuration ensures that the filter element 2 can be flushed while also avoiding the problem of insufficient pressure and flow of the medium oil flowing out of the pump body 1 due to excessive diversion of the medium oil at the outlet of the pump body 1 by the reflux channel 32.

[0033] In another embodiment, in order to prevent the reflux channel 32 from excessively diverting the medium oil at the outlet of the pump body 1 and to increase the pressure and flow rate of the medium oil in the reflux channel 32 when flushing the filter element 2, the area of ​​the filter element 2 covered by the oil return chamber 311 is not greater than one quarter of the total area of ​​the filter element 2. In order to prevent the medium oil from flushing the filter element 2 in too low an efficiency, the area of ​​the filter element 2 covered by the oil return chamber 311 is not less than one tenth of the total area of ​​the filter element 2.

[0034] In one embodiment, in order to improve the flushing effect of the medium oil on the filter element 2, the filter element 2 can rotate relative to the housing 3 in the accommodating chamber 31. Such a configuration can make the medium oil flush the filter element 2 more comprehensively, greatly reduce the possibility of impurities blocking the filter element 2, and increase the service life of the oil pump.

[0035] Further integration Figure 4 and Figure 5As shown, in one embodiment, the return oil passage 32 includes a first oil passage 321, a second oil passage 322 and a third oil passage 323. The first oil passage 321 is connected to the pump body 1, and part of the medium oil flowing out of the pump body 1 can enter the first oil passage 321. The second oil passage 322 is located inside the shell 3, and is connected between the first oil passage 321 and the third oil passage 323. The third oil passage 323 is located between the pump body 1 and the shell 3, and is connected to the pump oil inlet 11 through the filter element 2. Specifically, the third oil passage 323 is located between the outer wall of the pump body 1 and the inner wall of the shell 3, and is connected to the return oil chamber 311. The return oil passage 32 adopts the above-mentioned at least three-section design, which can facilitate the disassembly, assembly and maintenance of the oil pump and reduce the design difficulty of the oil pump.

[0036] In one embodiment, in order to allow the refluxed medium oil to enter the pump body 1 only through the circumferential surface of the filter element 2, and thus more efficiently flush the filter element 2, one end of the filter element 2 is sealed in contact with the bottom of the housing 3, and the other end is sealed in contact with the outer wall of the pump body 1. Specifically, the housing 3 includes a bottom wall 33 and a boss 34. The boss 34 is protruded from the bottom wall 33 toward the pump body 1. One end of the filter element 2 is sealed and sleeved on the boss 34, and the other end is sealed and ringed on the outer wall of the pump body 1.

[0037] In one embodiment, the housing 3 includes an oil inlet channel 35, an oil outlet channel 36 and a flow divider 37. The oil inlet channel 35 is connected to the oil inlet chamber 313, and the external medium oil enters the oil inlet chamber 313 through the oil inlet channel 35. The oil outlet channel 36 is connected to the outlet of the pump body 1, and the inlet of the oil return channel 32 is connected to the oil outlet channel 36, that is, the inlet of the first oil channel 321 is connected to the oil outlet channel 36, and then the medium oil in the oil outlet channel 36 is diverted for flushing the filter element 2.

[0038] The flow divider 37 is located in the housing 3 and connected to the pump body 1. The flow divider 37 is preferably a three-way valve. Part of the oil return channel 32 is connected to part of the oil outlet channel 36 and is arranged in the flow divider 37. Specifically, the first oil channel 321 is located in the flow divider 37.

[0039] In the present application, the pressure of the medium oil in the oil return channel 32 is greater than the pressure of the medium oil in the oil storage chamber 312. That is, the flow pressure of the medium oil flowing from the oil return chamber 311 to the oil storage chamber 312 is greater than the flow pressure from the oil storage chamber 312 to the oil return chamber 311, thereby preventing the medium oil from flowing back from the oil return channel 32 and affecting the flushing effect on the filter element 2. Of course, in order to better prevent the medium oil from flowing back into the oil return channel 32, a reverse flow valve can also be set in the oil return channel 32.

[0040] In one embodiment, the housing 3 includes an end cover 301, an upper housing 302 and a lower housing 303. The upper housing 302 is connected between the end cover 301 and the lower housing 303. The upper housing 302 and the lower housing 303 are assembled to form a receiving chamber 31, and the pump body 1 is located in the upper housing 302 and the lower housing 303. The first oil passage 321 is located inside the upper housing 302. The third oil passage 323 is formed between the inner wall of the upper housing 302 and the outer wall of the pump body 1. The oil return chamber 311 is located between the filter element 2 and the inner wall of the upper housing 302 and the inner wall of the lower housing 303. The flow divider 37 is located in the upper housing 302.

[0041] Further integration Figure 6 and Figure 7 As shown, in one embodiment, the filter element 2 includes a filter body 23 and a reinforcement frame 24. The reinforcement frame 24 is respectively arranged around the inner and outer sides and both ends of the filter body 23, and the reinforcement frame 24 and the filter body 23 are integrally formed to increase the overall strength of the filter element 2.

[0042] Furthermore, the filter element 2 is preferably cylindrical in structure. The reinforcement frame 24 includes a first fixing ring 241, a second fixing ring 242, a third fixing ring 243 and a reinforcement strip 244. The first fixing ring 241 is disposed at the front end 21 of the filter element 2 and is sealedly sleeved on the outer wall of the pump body 1. The second fixing ring 242 is located at the rear end 22 of the filter element 2 and is sealedly sleeved on the boss 34.

[0043] In the axial direction of the filter body 23, the third fixing ring 243 is located between the first fixing ring 241 and the second fixing ring 242. In order to further increase the strength of the filter element 2, a plurality of third fixing rings 243 are provided, and are arranged at intervals in the axial direction of the filter body 23. Further, the third fixing rings 243 are respectively arranged on the inner and outer sides of the filter body 23. A plurality of reinforcement strips 244 are provided, and are arranged at intervals in the circumferential direction of the filter body 23. The reinforcement strips 244 are located between the first fixing ring 241 and the second fixing ring 242, and at least connect the second fixing ring 242 and the third fixing ring 243.

[0044] In one embodiment, the reinforcing strip 244 includes an inner strip 2441 and an outer strip 2442. The inner strip 2441 is located inside the filter body 23 and connects at least the first fixing ring 241 and the third fixing ring 243. The outer strip 2442 is located outside the filter body 23 and connects the second fixing ring 242 and the third fixing ring 243.

[0045] The oil pump of the present application is provided with a filter element 2, and the pump oil inlet 11 is located in the filter element 2. The outlet of the return oil channel 32 is connected with the pump oil inlet 11 through the filter element 2, so that when the medium oil in the return oil channel 32 enters the pump body 1 again, the filter element 2 can be continuously flushed, so that impurities on the filter element 2 can fall off, thereby reducing the possibility of impurities clogging the filter element 2, improving the filtering efficiency of the filter element 2 and reducing the maintenance cycle, thereby increasing the service life of the oil pump.

Claims

1. An oil pump, characterized in that: include: A pump body, a filter element and a shell; the pump body is provided with a pump oil inlet; the shell is provided with a accommodating chamber and an oil return channel; the pump body and the filter element are located in the accommodating chamber, and the pump oil inlet is located in the filter element; the outlet of the oil return channel is connected to the pump oil inlet through the filter element.

2. The oil pump according to claim 1, characterized in that: At least a portion of the pump body is sleeved in the filter element; one end of the filter element is in sealing contact with the bottom of the shell, and the other end is in sealing contact with the outer wall of the pump body.

3. The oil pump according to claim 2, characterized in that: The shell comprises a bottom wall and a boss; the boss is arranged to protrude from the bottom wall toward the pump body; one end of the filter element is sealed and sleeved on the boss.

4. The oil pump according to claim 1, characterized in that: The accommodating chamber includes an oil return chamber and an oil storage chamber which are connected; the pump body is located in the oil storage chamber; the oil return chamber is located between the filter element and the inner wall of the shell; the outlet of the oil return channel is connected to the oil return chamber.

5. The oil pump according to claim 4, characterized in that: The oil return chamber extends from the front end to the rear end of the filter element, and the area of ​​the filter element covered by the oil return chamber is no more than one third of the total area of ​​the filter element.

6. The oil pump according to claim 4, characterized in that: The housing is provided with an oil inlet passage; the accommodating chamber includes an oil inlet chamber communicated with the oil inlet passage, and the oil inlet chamber is communicated with the oil storage chamber through the filter element.

7. The oil pump according to claim 1, characterized in that: The housing further comprises an oil outlet passage communicated with the pump body; an inlet of the oil return passage is communicated with the oil outlet passage.

8. The oil pump according to claim 7, characterized in that: The housing includes a flow divider; the flow divider is connected to the pump body; a portion of the oil return channel and a portion of the oil outlet channel are connected to each other and are arranged on the flow divider.

9. The oil pump according to claim 8, characterized in that The oil return passage includes a first oil passage, a second oil passage and a third oil passage; the first oil passage is located in the flow divider and is communicated with the oil outlet passage; the second oil passage is arranged inside the shell and is communicated between the first oil passage and the third oil passage; the third oil passage is located between the pump body and the shell and is communicated with the pump oil inlet through the filter element.

10. The oil pump according to claim 1, characterized in that The filter element comprises a filter body and a reinforcement frame; the reinforcement frame is respectively arranged around the inner and outer sides and both ends of the filter body.

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