Oil pump convenient for pressure reduction

Abstract

The utility model provides an oil pump convenient for pressure reduction, which belongs to the technical field of oil pumps and comprises an oil pool, the upper end of the oil pool is communicated with a first oil passage and a third oil passage, the first oil passage is communicated with an oil suction pump and a filter structure, and the filter structure is positioned above the oil suction pump. The side end, located between the oil suction pump and the engine oil pool, of the first oil channel communicates with a check valve, the end, away from the first oil channel, of the check valve communicates with a second oil channel, and a first pressure relief structure communicates between the first oil channel and the second oil channel located between the filtering structure and the oil suction pump. And a second pressure relief structure is communicated between the filtering structure and the third oil duct. According to the oil pump, the problems that when pressure in an existing oil pump is too large, oil can be temporarily stored in the first sliding cavity, but the space of the first sliding cavity is limited, the amount of the oil capable of being temporarily stored is small, practicability is not high, the overall abrasion is increased due to impurities, then the pressure is increased, and the service life is shortened are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine oil pumps, and in particular relates to an engine oil pump which is convenient for reducing pressure. Background Art

[0002] The oil pump is a component used to increase the oil pressure and ensure a certain amount of oil, and to force oil to be supplied to each friction surface. Due to structural limitations, the displacement of a traditional oil pump is fixed, and the oil discharge volume of the oil outlet chamber is often greater than the amount of oil required for system lubrication, and the oil pump outlet flow rate is proportional to the oil pump speed. When the pressure in the oil pump is too high, the pressure value in the oil outlet chamber will cause too much oil to flow into the combustion chamber, resulting in increased fuel consumption and affecting the performance of the engine. At the same time, it will also put pressure on the gears and rotation. This situation will continue to affect the stability of the overall performance of the oil pump and the service life of the oil pump.

[0003] The existing patent document (Announcement No.: CN206280713U) discloses a new type of oil pump, including a driving shaft, a driving gear, a driven shaft, a driven gear, and a housing, characterized in that: a groove is provided on the gear tooth side surface of the driving gear and the driven gear, a decompression structure is provided on the groove, a first screw hole is provided on the groove, a cavity cover is fixed on the groove, and the cavity cover accommodates the decompression structure in the groove, and the decompression structure includes a decompression cavity provided at one end of the bottom surface of the groove and extending to the tooth top surface, and a sliding structure provided in the decompression cavity. The decompression chamber includes a sliding chamber and a spring chamber. The sliding chamber includes a first sliding chamber and a second sliding chamber. The diameter of the first sliding chamber is smaller than that of the second sliding chamber and a step is formed at the junction of the two. The sliding structure includes a sliding rod and a spring. The sliding rod is placed in the first sliding chamber and extends to the second sliding chamber. A resistance block is provided at one end of the sliding rod extending to the second sliding chamber, and the resistance block matches the step. The spring is provided between the sliding rod and the spring chamber, and one end of the spring abuts against the bottom surface of the spring chamber, and the other end abuts against the spring hole on the bottom surface of the resistance block. When the pressure in the oil pump is too high, the oil will be temporarily stored in the first sliding chamber, but the space of the first sliding chamber is limited, and the amount of oil that can be temporarily stored is very small. The overall pressure relief effect is not obvious, and the practicality is not high. In addition, impurities in the oil enter the machinery, which will increase the overall mechanical wear, thereby causing the pressure to rise, greatly reducing the service life of the machinery. Summary of the invention

[0004] The utility model provides an oil pump which is easy to reduce pressure, and its purpose is to solve the problem that when the pressure in the existing oil pump is too high, the oil will be temporarily stored in the first sliding cavity, but the space of the first sliding cavity is limited, the amount of oil that can be temporarily stored is very small, the overall pressure relief effect is not obvious, the practicality is not high, and the impurities in the oil will enter the machinery, which will cause the overall mechanical wear to increase, thereby causing the pressure to increase, greatly reducing the service life of the machinery.

[0005] An embodiment of the utility model provides an oil pump that is easy to reduce pressure, including an oil pool, the upper end of the oil pool is connected to a first oil channel and a third oil channel, the third oil channel is on the right side of the first oil channel, the first oil channel is connected to an oil suction pump and a filtering structure, the filtering structure is above the oil suction pump, the side end of the first oil channel between the oil suction pump and the oil pool is connected to a check valve, the end of the check valve away from the first oil channel is connected to the second oil channel, the first oil channel between the filtering structure and the oil suction pump and the second oil channel are connected to a first pressure relief structure, and the filtering structure and the third oil channel are both connected to a second pressure relief structure.

[0006] Furthermore, the oil suction pump includes a rotating shaft, an inner rotor fixedly connected to the rotating shaft, and an outer rotor sleeved on the rotating shaft. The oil inlet and the oil outlet of the oil suction pump are both connected to the first oil channel. The inner rotor is installed inside the outer rotor. The inner rotor and the outer rotor are meshed with each other, and the outer rotor and the inner rotor are eccentrically arranged.

[0007] By adopting the above technical solution, the inner rotor and the outer rotor are driven to rotate by the rotation of the rotating shaft. The inner rotor and the outer rotor are eccentrically arranged so that a cavity is formed between the inner rotor and the outer rotor. Then, during the rotation, the volume of the cavity changes, completing the process of oil suction and oil compression.

[0008] Furthermore, the filtering structure includes an outer shell, an oil outlet pipe is fixedly connected to the oil inlet inside the outer shell, the oil outlet pipe is threadedly connected to the first oil channel, a plurality of oil outlet holes are evenly opened on the tube body of the oil outlet pipe, filter elements are arranged on the inner circumferential surface of the outer shell and the outer circumferential surface of the oil outlet pipe, and a magnetic rod is arranged between the two filter elements.

[0009] By adopting the above technical solution, the filtering structure can adsorb and filter impurities and metal debris in the engine oil, preventing impurities and metal debris from entering the machine, causing wear on the machine, and leading to increased pressure, thereby greatly improving the service life, and achieving the purpose of overall decompression through filtration.

[0010] Furthermore, the first pressure relief structure and the second pressure relief structure respectively include a first pressure relief pipe and a second pressure relief pipe, one end of the first pressure relief pipe and the inside of the second pressure relief pipe are fixedly connected to a base, a compression spring is fixedly connected to the base, a steel ball is fixedly connected to the top of the compression spring, the other end of the first pressure relief pipe is connected to the first oil channel, the side of the first pressure relief pipe is connected to the second oil channel, the other end of the second pressure relief pipe is connected to the outer shell, and the side of the second pressure relief pipe is connected to the third oil channel.

[0011] By adopting the above technical solution, when the pressure in the oil suction pump and the first oil channel is too high, it can flow to the second oil channel through the first pressure relief pipe for pressure relief. At the same time, when the pressure is still too high after pressure relief, it can flow to the third oil channel through the second pressure relief pipe, and then flow to the engine oil pool through the third oil channel, waiting for the oil suction pump to suck it in again, thereby improving the overall pressure relief effect and greatly improving the overall practicality.

[0012] Furthermore, the inner walls of the connection between the first pressure relief pipe and the first oil channel and the connection between the second pressure relief pipe and the shell are both conical, and the diameter of the steel ball is smaller than the inner diameter of the first pressure relief pipe and the second pressure relief pipe and larger than the inner diameter of the connection.

[0013] By adopting the above technical solution, under normal pressure, the steel ball will block the pressure relief pipe under the squeezing of the compression spring, so that the engine oil cannot enter the pressure relief pipe. When the engine oil pressure is greater than the elastic force of the compression spring, the engine oil will push the steel ball open and release the pressure through the pressure relief pipe.

[0014] Furthermore, the elastic force of the compression spring in the first pressure relief pipe is smaller than the elastic force of the compression spring in the second pressure relief pipe.

[0015] By adopting the above technical solution, during pressure relief, pressure relief is first performed through the first pressure relief pipe. After the first pressure relief pipe is relieved, if the oil pressure is still too high, pressure relief is then performed through the second pressure relief pipe.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model provides the first pressure relief structure and the second pressure relief structure. When the pressure in the oil suction pump and the first oil channel is too high, the engine oil can flow through the first pressure relief pipeline to the second oil channel for pressure relief. At the same time, when the pressure is still too high after the pressure relief, it can flow through the second pressure relief pipeline to the third oil channel, and then flow to the engine oil pool through the third oil channel to wait for the oil suction pump to suck it again, thereby improving the overall pressure relief effect and greatly improving the overall practicality.

[0018] 2. The utility model sets a filtering structure, which can adsorb impurities and metal debris in the engine oil, thereby preventing impurities and metal debris in the engine oil from entering the machine, increasing overall mechanical wear and further increasing engine oil pressure, thereby achieving the purpose of reducing pressure by filtering and greatly improving the service life of the machine.

[0019] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a front view structural schematic diagram of an embodiment of the utility model;

[0022] Figure 2 It is a front perspective structural schematic diagram of an embodiment of the utility model;

[0023] Figure numerals: 1. oil pool; 2. first oil channel; 3. oil suction pump; 31. rotating shaft; 32. inner rotor; 33. outer rotor; 4. filtering structure; 41. outer casing; 42. oil outlet pipe; 43. oil outlet hole; 44. magnetic rod; 45. filter element; 5. check valve; 6. second oil channel; 7. first pressure relief structure; 71. first pressure relief pipeline; 72. base; 73. compression spring; 74. steel ball; 8. third oil channel; 9. second pressure relief structure; 91. second pressure relief pipeline. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1 , Figure 2The utility model embodiment proposes an oil pump that is easy to reduce pressure, including an oil pool 1, the upper end of the oil pool 1 is connected to a first oil channel 2 and a third oil channel 8, the third oil channel 8 is on the right side of the first oil channel 2, the first oil channel 2 is connected to an oil suction pump 3 and a filtering structure 4, the oil suction pump 3 includes a rotating shaft 31, an inner rotor 32 fixedly connected to the rotating shaft 31, and an outer rotor 33 sleeved on the rotating shaft 31, the oil inlet and the oil outlet of the oil suction pump 3 are both connected to the first oil channel 2, the inner rotor 32 is installed inside the outer rotor 33, the inner rotor 32 and the outer rotor 33 are meshed with each other, the outer rotor 33 and the inner rotor 32 are eccentrically arranged, the inner rotor 32 and the outer rotor 33 are driven to rotate by the rotation of the rotating shaft 31, the inner rotor 32 and the outer rotor 33 are eccentrically arranged, so that the inner rotor A cavity is formed between the rotor 32 and the outer rotor 33, and when the rotor rotates, the volume of the cavity changes, completing the process of oil suction and oil pressure. The filtering structure 4 includes a shell 41, and the interior of the shell 41 is fixedly connected to an oil outlet pipe 42 at the oil inlet. The oil outlet pipe 42 is threadedly connected to the first oil channel 2, and a plurality of oil outlet holes 43 are evenly opened on the tube body of the oil outlet pipe 42. Filter elements 45 are provided on the inner circumferential surface of the shell 41 and the outer circumferential surface of the oil outlet pipe 42, and a magnetic rod 44 is provided between the two filter elements 45. The filtering structure 4 can absorb and filter impurities and metal debris in the engine oil, thereby preventing impurities and metal debris from entering the machine, causing wear on the machine, and causing pressure increase, thereby greatly improving the service life, and achieving the purpose of decompressing the entire machine through filtering.

[0026] Reference Figure 1 , Figure 2The filtering structure 4 is located above the oil suction pump 3, and a check valve 5 is connected to the side end of the first oil passage 2 between the oil suction pump 3 and the engine oil pool 1. The end of the check valve 5 away from the first oil passage 2 is connected to the second oil passage 6. A first pressure relief structure 7 is connected between the first oil passage 2 and the second oil passage 6 between the filtering structure 4 and the oil suction pump 3. A second pressure relief structure 9 is connected between the filtering structure 4 and the third oil passage 8. The first pressure relief structure 7 and the second pressure relief structure 9 respectively include a first pressure relief pipeline 71 and a second pressure relief pipeline 91. The first pressure relief pipeline 71 and the second pressure relief pipeline 91 are connected to each other. One end of each of the two pressure relief pipes 91 is fixedly connected to a base 72, a compression spring 73 is fixedly connected to the base 72, a steel ball 74 is fixedly connected to the top of the compression spring 73, the other end of the first pressure relief pipe 71 is connected to the first oil passage 2, the side of the first pressure relief pipe 71 is connected to the second oil passage 6, the other end of the second pressure relief pipe 91 is connected to the housing 41, the side of the second pressure relief pipe 91 is connected to the third oil passage 8, when the pressure in the oil suction pump 3 and the first oil passage 2 is too large, it can flow through the first pressure relief pipe 71 to the second oil passage 6 for pressure relief, and at the same time When the pressure is still too high after the pressure is released, it can flow to the third oil channel 8 through the second pressure relief pipe 91, and then flow to the engine oil pool 1 through the third oil channel 8, waiting for the oil suction pump 3 to be sucked again, thereby improving the overall pressure relief effect and greatly improving the overall practicality. The inner walls of the connection between the first pressure relief pipe 71 and the first oil channel 2 and the connection between the second pressure relief pipe 91 and the filter structure 4 are both conical. The diameter of the steel ball 74 is smaller than the inner diameter of the first pressure relief pipe 71 and the second pressure relief pipe 91 and larger than the inner diameter of the connection. Under normal pressure, the steel ball 74 will be compressed in the spring The spring 73 is squeezed to block the pressure relief pipe, so that the engine oil cannot enter the pressure relief pipe. When the engine oil pressure is greater than the elastic force of the compression spring 73, the engine oil will push the steel ball 74 open and release the pressure through the pressure relief pipe. The elastic force of the compression spring 73 in the first pressure relief pipe 71 is less than the elastic force of the compression spring 73 in the second pressure relief pipe 91. When releasing the pressure, the pressure is first released through the first pressure relief pipe 71. After the first pressure relief pipe 71 is released, the engine oil pressure is still too high and then released through the second pressure relief pipe 91. All the above connections are provided with sealing gaskets for sealing.

[0027] The specific implementation method is as follows: when in use, the rotating shaft 31 rotates, driving the inner rotor 32 and the outer rotor 33 to rotate, and then the volume of the cavity between the inner rotor 32 and the outer rotor 33 changes. When the cavity passes the oil inlet, the volume increases, generating a vacuum, thereby causing a pressure difference between the cavity in the oil suction pump 3 and the outside world, so that the oil suction pump 3 can suck the engine oil. When it passes the oil outlet, the volume decreases, and then the oil suction pump 3 can press the engine oil out from the oil outlet. When the pressure in the oil suction pump 3 and the first oil channel 2 is too high, the engine oil will push open the steel ball 74 in the first pressure relief pipe 71, causing the engine oil to flow from the first pressure relief pipe 71 to the second oil channel 6, and The oil flows back into the first oil channel 2 through the check valve 5 to relieve the pressure on the whole. When the engine oil enters the filtering structure 4, the filter element 45 and the magnetic rod 44 will adsorb impurities and metal debris in the engine oil to prevent impurities and metal debris from flowing into the machine, increasing the wear of the whole machine and causing pressure increase. When the filtering effect of the filtering structure 4 decreases, the internal pressure will increase again. At this time, the engine oil will push open the steel balls 74 in the second pressure relief pipe 91, so that the engine oil flows directly from the second pressure relief pipe 91 through the third oil channel 8 into the engine oil pool 1, waiting for the oil suction pump 3 to be re-sucked, thereby improving the overall pressure relief effect and greatly improving the overall practicality.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An oil pump for facilitating decompression, comprising an oil pool (1), It is characterized in that The upper end of the engine oil pool (1) is connected to a first oil passage (2) and a third oil passage (8), the third oil passage (8) is located on the right side of the first oil passage (2), the first oil passage (2) is connected to an oil suction pump (3) and a filter structure (4), the filter structure (4) is located above the oil suction pump (3), the side end of the first oil passage (2) between the oil suction pump (3) and the engine oil pool (1) is connected to a check valve (5), the end of the check valve (5) away from the first oil passage (2) is connected to a second oil passage (6), the first oil passage (2) between the filter structure (4) and the oil suction pump (3) and the second oil passage (6) are connected to a first pressure relief structure (7), and the filter structure (4) and the third oil passage (8) are both connected to a second pressure relief structure (9).

2. An oil pump for facilitating decompression according to claim 1, Features: The oil suction pump (3) comprises a rotating shaft (31), an inner rotor (32) fixedly connected to the rotating shaft (31), and an outer rotor (33) sleeved on the rotating shaft (31); an oil inlet and an oil outlet of the oil suction pump (3) are both connected to the first oil passage (2); the inner rotor (32) is installed inside the outer rotor (33); the inner rotor (32) and the outer rotor (33) are meshed with each other; and the outer rotor (33) and the inner rotor (32) are eccentrically arranged.

3. An oil pump for facilitating decompression according to claim 2, Features: The filtering structure (4) comprises a shell (41), an oil outlet pipe (42) is fixedly connected to the oil inlet inside the shell (41), the oil outlet pipe (42) is threadedly connected to the first oil channel (2), a plurality of oil outlet holes (43) are evenly arranged on the body of the oil outlet pipe (42), filter elements (45) are arranged on the inner circumference of the shell (41) and the outer circumference of the oil outlet pipe (42), and a magnetic rod (44) is arranged between the two filter elements (45).

4. An oil pump for facilitating decompression according to claim 3, Features: The first pressure relief structure (7) and the second pressure relief structure (9) respectively comprise a first pressure relief pipe (71) and a second pressure relief pipe (91); one end of the first pressure relief pipe (71) and the second pressure relief pipe (91) are fixedly connected to a base (72); a compression spring (73) is fixedly connected to the base (72); a steel ball (74) is fixedly connected to the top of the compression spring (73); the other end of the first pressure relief pipe (71) is connected to the first oil channel (2); the side of the first pressure relief pipe (71) is connected to the second oil channel (6); the other end of the second pressure relief pipe (91) is connected to the housing (41); and the side of the second pressure relief pipe (91) is connected to the third oil channel (8).

5. An oil pump for facilitating decompression according to claim 4, Features: The inner walls of the connection between the first pressure relief pipe (71) and the first oil channel (2) and the connection between the second pressure relief pipe (91) and the housing (41) are both conical, and the diameter of the steel ball (74) is smaller than the inner diameter of the first pressure relief pipe (71) and the second pressure relief pipe (91) and larger than the inner diameter of the connection.

6. An oil pump for facilitating decompression according to claim 4, Features: The elastic force of the compression spring (73) in the first pressure relief pipe (71) is smaller than the elastic force of the compression spring (73) in the second pressure relief pipe (91).

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