Oil pump with double oil inlets

Abstract

The invention provides an oil pump with double oil inlets, which comprises a pump body, a driving gear and a driven gear, the pump body is provided with a pump cavity, a first oil inlet, a first oil inlet cavity, a second oil inlet, a second oil inlet cavity, an oil outlet cavity and an oil outlet, the driving gear and the driven gear are arranged in the pump cavity, the first oil inlet cavity corresponds to the driving gear, and the second oil inlet cavity corresponds to the second oil inlet cavity. The first oil inlet cavity corresponds to the driving gear, the second oil inlet cavity corresponds to the driven gear, a spacing part is arranged between the first oil inlet cavity and the second oil inlet cavity, a first sealing face is formed in the position, corresponding to the driving gear, of the spacing part, a second sealing face is formed in the position, corresponding to the driven gear, of the spacing part, and the oil outlet cavity corresponds to the meshing position of the two gears. A third sealing face is formed at the position, corresponding to the driving gear, of the pump body part between the first oil inlet cavity and the oil outlet cavity, and a fourth sealing face is formed at the position, corresponding to the driving gear, of the pump body part between the second oil inlet cavity and the oil outlet cavity. According to the technical scheme, when one oil inlet sucks air, the other oil inlet can normally suck oil.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engine lubrication, and in particular to an oil pump with double oil inlets. Background Art

[0002] In some special engines, there are at least two parts of the oil that need to be pumped by the oil pump to ensure the normal circulation of the oil, and the oil volume at these suction points is unstable, and there may be a situation where the oil is sucked out. This determines that an ordinary oil pump cannot be used to directly divide multiple oil suction ports for oil suction. Otherwise, as long as one oil suction port is sucked out, the other oil suction ports will lose their oil suction capacity.

[0003] In view of the above situation, conventional solutions include: 1) using multiple independent oil pumps; 2) using multi-stage oil pumps, such as two-stage pumps and three-stage pumps; 3) using three-tooth pumps, which is equivalent to one two-stage pump. However, these solutions generally have the disadvantages of complex structure, occupying a lot of space, being very troublesome to design and arrange, and the cost is also very high. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an oil pump with a simple structure and double oil inlets.

[0005] The technical solution of the oil pump with double oil inlets of the present invention is: an oil pump with double oil inlets, comprising a pump body, a driving gear, and a driven gear, wherein the pump body is provided with a pump chamber, a first oil inlet, a first oil inlet chamber, a second oil inlet, a second oil inlet chamber, an oil outlet chamber, and an oil outlet, the driving gear and the driven gear are rotatably disposed in the pump chamber, the first oil inlet chamber corresponds to the driving gear, and the second oil inlet chamber corresponds to the driven gear; a spacer is provided between the first oil inlet chamber and the second oil inlet chamber, the spacer forms a first sealing surface corresponding to the position of the driving gear, and the spacer A second sealing surface is formed at the position corresponding to the driven gear; the oil outlet chamber corresponds to the meshing position of the two gears; a third sealing surface is formed at the pump body portion located between the first oil inlet chamber and the oil outlet chamber at the position corresponding to the driving gear, and the engine oil sucked from the first oil inlet port enters the oil outlet chamber through the side gap between the driving gear and the third sealing surface; a fourth sealing surface is formed at the pump body portion located between the second oil inlet chamber and the oil outlet chamber at the position corresponding to the driving gear, and the engine oil sucked from the second oil inlet port enters the oil outlet chamber through the side gap between the driven gear and the fourth sealing surface; all four sealing surfaces are arc-shaped wall surfaces.

[0006] Preferably, the first sealing surface and the third sealing surface are located on the same circumferential line, and the second sealing surface and the fourth sealing surface are located on the same circumferential line.

[0007] Preferably, the first sealing surface and the second sealing surface are connected to form a herringbone shape.

[0008] In one embodiment, the first sealing surface and the second sealing surface have the same length, and the third sealing surface and the fourth sealing surface have the same length.

[0009] In one embodiment, the lengths of the third sealing surface and the fourth sealing surface are greater than the lengths of the first sealing surface and the second sealing surface.

[0010] The oil pump provided by the present invention is improved on the basis of an ordinary two-tooth pump. After adding an oil inlet, two sealing surfaces are added between the two gears to isolate the two oil inlets. In this way, when one of the oil inlets is sucked empty, the other oil inlet can still suck oil normally. There is no need to add additional parts. Only the pump body needs to be improved and an oil inlet needs to be added. Therefore, it has the advantages of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the structure of an oil pump with double oil inlets in an embodiment of the present invention; The accompanying drawings are marked as follows: 1. Pump body; 2. Driving gear; 3. Driven gear; 11. First oil inlet; 12. Second oil inlet; 13. Oil outlet; 21. First sealing surface; 22. Second sealing surface; 23. Third sealing surface; 24. Fourth sealing surface; 31. First oil inlet chamber; 32. Second oil inlet chamber; 33. Oil outlet chamber. DETAILED DESCRIPTION

[0012] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0013] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] like Figure 1The oil pump with double oil inlets shown in the figure comprises a pump body 1, a driving gear 2, and a driven gear 3. The pump body 1 is provided with a pump chamber, a first oil inlet 11, a first oil inlet chamber 31, a second oil inlet 12, a second oil inlet chamber 32, an oil outlet chamber 33 and an oil outlet 13. The driving gear 2 and the driven gear 3 are rotatably disposed in the pump chamber. The first oil inlet chamber 31 corresponds to the driving gear 2, and the second oil inlet chamber 32 corresponds to the driven gear 3. There is a partition between the first oil inlet chamber 31 and the second oil inlet chamber 32. The partition forms a first sealing surface 21 corresponding to the position of the driving gear 2, and the partition forms a second sealing surface 22 corresponding to the position of the driven gear 3. The oil outlet chamber 33 corresponds to the meshing position of the two gears and is located in the first oil inlet chamber 31. The pump body portion between the second oil inlet chamber 32 and the oil outlet chamber 33 forms a third sealing surface 23 corresponding to the position of the driving gear 2, and the pump body portion between the second oil inlet chamber 32 and the oil outlet chamber 33 forms a fourth sealing surface 24 corresponding to the position of the driving gear 2; the four sealing surfaces are all arc-shaped wall surfaces, the first sealing surface 21 and the third sealing surface 23 are located on the same circumference, and the second sealing surface 22 and the fourth sealing surface 24 are located on the same circumference; the first sealing surface 21 and the second sealing surface 22 are connected to form a "human" shape; the lengths of the first sealing surface 21 and the second sealing surface 22 are equal, and the lengths of the third sealing surface 23 and the fourth sealing surface 24 are equal; the lengths of the third sealing surface 23 and the fourth sealing surface 24 are greater than the lengths of the first sealing surface 21 and the second sealing surface 22.

[0015] When the oil pump is running, the oil sucked by the first oil inlet 11 enters the oil outlet chamber 33 through the side gap between the driving gear 2 and the third sealing surface 23, and the oil sucked by the second oil inlet 12 enters the oil outlet chamber 33 through the side gap between the driven gear 3 and the fourth sealing surface 24. The two oil inlet channels do not interfere with each other. After merging in the oil outlet chamber 33, they are transported to the engine oil channel through the oil outlet 13 together, thereby realizing that one oil pump sucks oil from two different parts, and when one oil inlet is emptied, the other oil inlet can suck oil normally.

[0016] The oil pump provided in this embodiment is an improvement on the basis of a common two-tooth pump. No additional parts are required. Only the pump body needs to be improved and an oil inlet needs to be added. Therefore, it has the advantages of simple structure and low cost.

[0017] In order to make it easier for ordinary technicians in the field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. An oil pump with dual oil inlets, comprising a pump body (1), a driving gear (2), and a driven gear (3), characterized in that: The pump body (1) is provided with a pump chamber, a first oil inlet (11), a first oil inlet chamber (31), a second oil inlet (12), a second oil inlet chamber (32), an oil outlet chamber (33) and an oil outlet (13); a driving gear (2) and a driven gear (3) are rotatably disposed in the pump chamber; the first oil inlet chamber (31) corresponds to the driving gear (2), and the second oil inlet chamber (32) corresponds to the driven gear (3); a partition is provided between the first oil inlet chamber (31) and the second oil inlet chamber (32); the partition forms a first sealing surface (21) at a position corresponding to the driving gear (2), and the partition forms a second sealing surface (22) at a position corresponding to the driven gear (3); the oil outlet chamber ( The pump body portion located between the first oil inlet chamber (31) and the oil outlet chamber (33) corresponds to the meshing position of the two gears; the pump body portion located between the first oil inlet chamber (31) and the oil outlet chamber (33) corresponds to the position of the driving gear (2) to form a third sealing surface (23), and the engine oil sucked from the first oil inlet port (11) enters the oil outlet chamber (33) through the side gap between the driving gear (2) and the third sealing surface (23); the pump body portion located between the second oil inlet chamber (32) and the oil outlet chamber (33) corresponds to the position of the driving gear (2) to form a fourth sealing surface (24), and the engine oil sucked from the second oil inlet chamber (12) passes through the side gap between the driven gear (3) and the fourth sealing surface (24) to enter the oil outlet chamber (33); the four sealing surfaces are all arc-shaped wall surfaces.

2. The oil pump with dual oil inlets according to claim 1, characterized in that: The first sealing surface (21) and the third sealing surface (23) are located on the same circumferential line, and the second sealing surface (22) and the fourth sealing surface (24) are located on the same circumferential line.

3. The oil pump with dual oil inlets according to claim 2, characterized in that: The first sealing surface (21) and the second sealing surface (22) are connected to form a herringbone shape.

4. The oil pump with dual oil inlets according to claim 2, characterized in that: The first sealing surface (21) and the second sealing surface (22) are of equal length, and the third sealing surface (23) and the fourth sealing surface (24) are of equal length.

5. The oil pump with dual oil inlets according to claim 4, characterized in that: The lengths of the third sealing surface (23) and the fourth sealing surface (24) are greater than the lengths of the first sealing surface (21) and the second sealing surface (22).

Images