Oil pump, engine, power assembly and vehicle
By setting up a drainage groove at the end face gap of the oil pump, the leaked engine oil is drained to the oil suction area, which solves the problems of engine oil leakage and loss, and improves the efficiency of the oil pump and the stability of the engine.
Patent Information
- Application Number
- CN202420260833.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-01-31
Smart Images
Figure CN222597368U_ABST
Abstract
Description
Technical Field
[0001] The utility model generally relates to the technical field of oil pumps, and in particular to an oil pump, an engine, a power assembly and a vehicle. Background Art
[0002] The oil pump of a car engine is driven by the engine. As the engine speed increases, the oil pump oil displacement also increases. In long-term applications, it is found that the oil displacement required by the lubrication system of the car engine does not increase with the increase in engine speed. In order to achieve energy conservation and emission reduction, the oil pump oil displacement should correspond to the oil displacement required by the engine lubrication system. Therefore, the variable displacement oil pump with variable pressure came into being.
[0003] The variable displacement oil pump has a high-pressure oil chamber, a low-pressure oil chamber and a feedback oil chamber. In the related technology, there is a gap between the joint end faces of the pump body and the pump cover. Under high temperature conditions, the viscosity of the oil decreases, and the oil in the first oil chamber and the feedback oil chamber is easy to leak through the end face gap, causing oil loss, resulting in reduced oil pump efficiency. In severe cases, the oil pressure will be insufficient and the engine will be damaged. Utility Model Content
[0004] In view of the above-mentioned defects or deficiencies in the background technology, it is desirable to provide an oil pump, an engine, a powertrain and a vehicle.
[0005] In a first aspect of the present application, an oil pump is provided, comprising a housing, the housing comprising a first shell and a second shell; the first shell having a first end face, the second shell having a second end face, the housing having a accommodating cavity surrounded by the first shell and the second shell and used to accommodate lubricating oil, the first end face and the second end face being fitted together; the accommodating cavity comprising an oil supply area and an oil suction area; a drainage groove is provided between the first end face and the second end face, the drainage groove is located between the oil supply area and the outer side wall of the housing, and the drainage groove is connected to the oil suction area.
[0006] As an achievable method, it also includes an oil pumping mechanism;
[0007] The accommodating chamber also includes an oil pumping area, the oil pumping mechanism is arranged in the oil pumping area, and the oil suction area and the oil supply area are respectively connected to the oil pumping area.
[0008] As a feasible method, the oil pumping mechanism includes a rotor, a hollow slider and a plurality of blades; the hollow slider is sleeved on the outside of the rotor; the plurality of blades are located in the annular space between the hollow slider and the rotor, the plurality of blades are circumferentially spaced on the outside of the rotor, the plurality of blades and the hollow slider are eccentrically arranged, and the plurality of blades, the hollow slider and the rotor enclose a plurality of oil pumping chambers, one of which is connected to the oil suction area, and one of which is connected to the oil supply area.
[0009] As an achievable manner, the rotor includes a rotating shaft, the first shell is provided with a through hole for the rotating shaft to pass through, the through hole is connected to the accommodating cavity, and a sealing member is provided between the through hole and the rotating shaft.
[0010] As an achievable manner, the hollow slider can be movable in the oil pumping area to change the eccentricity between the hollow slider and the rotor.
[0011] As a feasible method, a movable part is provided on the outer wall of the hollow slider, the movable part abuts against the inner wall of the accommodating cavity, and can move along a predetermined direction to change the eccentricity; the oil supply area includes a first sub-area, and the first sub-area is on the one side in the predetermined direction of the movable part; the oil suction area includes a second sub-area, and the second sub-area is on the other side in the predetermined direction of the movable part, and a pressure difference can be formed between the first sub-area and the second sub-area to drive the movable part to move.
[0012] As an achievable manner, the oil supply area further includes a third sub-area adapted to communicate with the oil outlet, and the oil suction area further includes a fourth sub-area adapted to communicate with the oil inlet;
[0013] The drainage groove comprises a first drainage section, and the first drainage section is located between the first sub-region and the outer side wall of the shell; and / or
[0014] The drainage groove comprises a second drainage section, and the first drainage section is located between the third sub-region and the outer side wall of the shell.
[0015] As a feasible method, the drainage groove includes a first drainage section, which is located between the first sub-region and the edge of the first end face, and the drainage groove includes a second drainage section, which is located between the third sub-region and the edge of the first end face; the first sub-region, the third sub-region, the second sub-region and the fourth sub-region are arranged in sequence in the circumferential direction, the first drainage section is connected to the fourth sub-region, and the second drainage section is connected to the second sub-region.
[0016] As an implementable manner, the first sub-region is connected to one of the oil outlet, the main oil gallery of the engine, and the engine cylinder head.
[0017] A second aspect of the present application provides an engine, comprising the oil pump of the first aspect.
[0018] A third aspect of the present application provides a power assembly, comprising the oil pump of the first aspect or the engine of the second aspect.
[0019] A fourth aspect of the present application provides a vehicle comprising the engine of the second aspect or the powertrain of the third aspect.
[0020] The present application provides an oil pump, an engine, a powertrain and a vehicle. By setting a drainage groove between a first end face and a second end face, the oil leaked from the end face gap is drained to an oil suction area with lower pressure, thereby reducing the oil loss caused by leakage and improving the oil pumping efficiency of the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings;
[0022] Figure 1 An implementation of an oil pump provided in this application;
[0023] Figure 2 A schematic diagram of the sealing structure of an oil pump provided in this application.
[0024] In the figure,
[0025] 100. Shell,
[0026] 10. a first shell, 11. a first end surface,
[0027] 20. a second shell, 21. a second end surface,
[0028] 30. Accommodation chamber, 31. Oil supply area, 32. Oil suction area, 33. Oil pump area,
[0029] 40. Oil pump mechanism, 41. Rotor, 42. Hollow slider, 43. Blade, 44. Oil pump chamber, 45. Moving part, 46. Elastic member, 47. Rotating shaft,
[0030] 50. Seal, 51. Through hole,
[0031] 60, first sub-area, 61, second sub-area, 62, third sub-area, 63, fourth sub-area,
[0032] 70. Drainage trough, 71. First drainage section, 72. Second drainage section. DETAILED DESCRIPTION
[0033] The present application will be further described in detail below in conjunction with the accompanying drawings and implementation methods. It is to be understood that the present application can be implemented in various forms and should not be limited by the implementation methods described herein. On the contrary, these implementation methods are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art. It is also necessary to explain that, for ease of description, only the parts related to the present application are shown in the accompanying drawings.
[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0035] Embodiments of the present application provide an oil pump, an engine, a powertrain, and a vehicle.
[0036] Vehicles can be gasoline vehicles, diesel vehicles, or hybrid vehicles. For vehicles, the drive assembly is the heart of the vehicle, driving the vehicle. The engine is an important part of the drive assembly, providing power for the vehicle to travel. The engine needs oil lubrication during operation to reduce mechanical loss. The oil pump can deliver the oil in the oil pan to the moving parts of the engine after supercharging. After the oil is supercharged, the temperature rises and the oil viscosity decreases. There is an end face gap between the end faces of the oil pump body and the pump cover. The high-pressure oil will flow out of the oil pumping area through the end face gap, causing oil loss and affecting the oil pumping efficiency.
[0037] Figure 1 The present application provides an embodiment of an oil pump, including a housing 100, the housing 100 including a first shell 10 and a second shell 20, the first shell 10 having a first end face 11, the second shell 20 having a second end face 21, the first end face 11 and the second end face 21 being fitted together, the first shell 10 and the second shell 20 enclose a receiving chamber 30 for receiving lubricating oil. The receiving chamber 30 includes an oil supply area 31 and an oil suction area 32, a drainage groove 70 is provided on the first end face 11, the drainage groove 70 is located between the oil supply area 31 and the edge of the first end face 11, and the drainage groove 70 is connected to the oil suction area 32.
[0038] The oil pump of the embodiment of the present application can be used in an engine to pump the lubricating oil, i.e., engine oil, in the engine. It can also be used in other mechanical equipment that requires lubricating oil, such as a gas turbine.
[0039] Among them, the first shell 10 can be either the pump body of the oil pump or the pump cover of the oil pump. When the first shell 10 is the pump body, the second shell 20 is the pump cover. When the first shell 10 is the pump cover, the second shell 20 is the pump body. The pump body and the pump cover are arranged to form a accommodating chamber 30. The accommodating chamber 30 is provided with an oil supply area 31 and an oil suction area 32. The oil suction area 32 contains low-pressure oil before pressurization, and the oil supply area 31 contains high-pressure oil after pressurization by the oil pump.
[0040] Since the accommodating chamber 30 is formed by splicing the first shell 10 and the second shell 20 together by means of bolt connection, there is inevitably a certain gap between the first end face 11 and the second end face 21, and the high-pressure oil in the oil supply area 31 can easily penetrate out from this gap, resulting in oil leakage.
[0041] In the oil pump provided in the embodiment of the present application, a drainage groove 70 is provided between the oil supply area 31 where the high-pressure oil is located and the outer wall of the housing 100, that is, a drainage groove 70 is provided between the first end face 11 and the second end face 21, so that the oil leaked from the fitting surface of the first end face 11 and the second end face 21 is introduced into the oil suction area 32 where the low-pressure oil is located, thereby reducing the leakage loss of the oil in the oil pump and improving the oil pumping efficiency of the oil pump.
[0042] The oil flowing back into the oil suction area 32 will be pressurized again by the oil pump and pumped to the main oil gallery of the engine.
[0043] Furthermore, the cross-sectional area of the drainage groove 70 is set so that the oil can flow in the drainage groove 70 only when the oil pressure is greater than a certain value, or the connection port between the drainage groove 70 and the oil suction area 32 is set so that the oil can pass through only when the oil pressure is greater than a certain value, so as to prevent the oil in the oil suction area 32 from entering the drainage groove 70, thereby realizing the unidirectional flow of the oil in the drainage groove 70.
[0044] The drainage groove 70 may be disposed on the first end surface 11 , or on the second end surface 21 , or may be formed by enclosing the first end surface 11 and the second end surface 21 .
[0045] In a preferred embodiment, since the oil suction area 32 and the oil supply area 31 are basically located on the pump body, the drainage groove 70 is provided on the end surface of the pump body to more conveniently drain the oil back into the oil suction area 32 .
[0046] As a feasible method, an oil pumping area 33 is also provided in the accommodating chamber 30, and the oil pumping area 33 is connected to both the oil suction area 32 and the oil supply area 31, so as to pressurize the low-pressure oil into high-pressure oil. The oil pump has an oil pumping mechanism 40, and the oil pumping mechanism 40 is arranged in the oil pumping area 33 in the accommodating chamber 30. The oil pumping mechanism 40 is used to pressurize the low-pressure oil and pump it out to the parts to be lubricated of the engine.
[0047] As a feasible method, the oil pumping mechanism 40 includes a rotor 41, a hollow slider 42 and a plurality of blades 43. The rotor 41 is connected to the output shaft of the motor to drive the plurality of blades 43 to rotate. The hollow slider 42 is arranged on the outside of the rotor 41. The plurality of blades 43 are connected in the annular space between the rotor 41 and the hollow slider 42 and the plurality of blades 43 are arranged at intervals. The plurality of blades 43, the hollow slider 42 and the rotor 41 enclose a plurality of oil pumping chambers 44, one of which is connected to the oil suction area 32 to allow the engine oil to enter, and one of which is connected to the oil supply area 31 to allow the engine oil to be pumped out. Since the plurality of blades 43 and the hollow slider 42 are eccentrically arranged, as the rotor 41 rotates clockwise or counterclockwise, the volume and position of the oil pumping chamber 44 change, thereby pressurizing and pumping the engine oil.
[0048] As an achievable method, Figure 2 As shown, the rotor 41 includes a rotating shaft 47 that drives the rotor 41 to rotate. The first shell 10 is provided with a through hole 51 for the rotating shaft 47 to pass through. The through hole 51 is connected to the accommodating chamber 30. A seal 50 is provided between the through hole 51 and the rotating shaft 47 to prevent the lubricating oil in the accommodating chamber 30 from leaking.
[0049] As an achievable method, Figure 1 As shown, the hollow slider 42 can move in the oil pumping area 33 to change the eccentricity between the hollow slider 42 and the rotor 41 to adjust the oil supply pressure of the oil pump to adapt to different working conditions of the engine.
[0050] In order to realize the movement of the hollow slider 42, as a feasible method, a movable part 45 is provided on the outer wall of the hollow slider 42, and the movable part 45 abuts against the inner wall of the accommodating cavity 30, and can move along a predetermined direction to change the eccentricity; the oil supply area 31 includes a first sub-area 60, and the first sub-area 60 is on the one side of the predetermined direction of the movable part 45, and the oil suction area 32 includes a second sub-area 61, and the second sub-area 61 is on the other side of the predetermined direction of the movable part 45, and a pressure difference can be formed between the first sub-area 60 and the second sub-area 61 to drive the movable part 45 to move.
[0051] When the oil supply pressure of the oil pump is too high, the moving part 45 is driven to move, changing the eccentricity between the hollow slider 42 and the rotor 41, thereby changing the volume of the pump oil chamber 44 to reduce the oil supply pressure of the oil pump.
[0052] The predetermined direction may be a linear direction, and the hollow slider 42 moves along the linear direction to change the eccentricity; the predetermined direction may also be a circumferential direction of the rotor 41, and the hollow slider 42 moves along the circumferential direction to change the eccentricity. When the predetermined direction is a linear direction, the eccentricity adjustment effect is better than when the predetermined direction is the circumferential direction of the rotor 41, but the accuracy is relatively low.
[0053] As an implementable manner, the oil pump further includes an elastic member 46 , which is disposed in the second sub-region 61 , and the elastic member 46 is clamped between the inner wall of the oil suction region 32 and the moving portion 45 .
[0054] When the oil supply pressure of the oil pump is normal, the elastic member 46 drives the moving part 45 to return to its original position, so as to increase the oil supply pressure of the oil pump.
[0055] As a feasible manner, the oil supply area 31 also includes a third sub-area 62 suitable for communicating with the oil outlet, and the oil suction area 32 also includes a fourth sub-area 63 suitable for communicating with the oil inlet; the drainage groove 70 includes a first drainage section 71, and the first drainage section 71 is located between the first sub-area 60 and the outer wall of the shell 100 to guide the oil leaked from the first sub-area 60 connected to the oil outlet back to the oil suction area 32.
[0056] As a feasible method, since the oil in the third sub-area 62 needs to drive the movable part 45 to move, the oil pressure in the third sub-area 62 is relatively high, and there is also a problem of easy leakage. Therefore, the drainage groove 70 includes a second drainage section 72, and the first drainage section 71 is located between the third sub-area 62 and the outer wall of the shell 100 to guide the oil leaked when the movable part 45 is driven to move back to the oil suction area 32.
[0057] As a feasible method, the drainage groove 70 includes a first drainage section 71 and a second drainage section 72 to minimize oil leakage; the first drainage section 71 is located between the first sub-region 60 and the edge of the first end face 11, and the first drainage section 71 is located between the third sub-region 62 and the edge of the first end face 11; the first sub-region 60, the third sub-region 62, the second sub-region 61 and the fourth sub-region 63 are arranged in sequence in the circumferential direction, the first drainage section 71 is connected to the fourth sub-region 63, and the second drainage section 72 is connected to the second sub-region 61.
[0058] In this embodiment, the circumferentially distributed first sub-region 60, the third sub-region 62, the second sub-region 61 and the fourth sub-region 63 enable the first drainage section 71 and the second drainage section 72 to guide the leaked oil back to the low-pressure oil suction area 32 nearby, which is beneficial to the arrangement of the drainage groove 70 on the oil pump.
[0059] As an implementable manner, the first sub-region 60 is suitable for being connected to one of the oil outlet, the main oil channel of the engine, and the engine cylinder head, so as to adjust the eccentricity according to the actual oil supply pressure of the oil pump.
[0060] An embodiment of the present application further provides an engine, comprising the above-mentioned oil pump.
[0061] An embodiment of the present application further provides a power assembly, comprising the above-mentioned engine or the above-mentioned oil pump.
[0062] An embodiment of the present application further provides a vehicle, comprising the above-mentioned engine or the above-mentioned powertrain.
[0063] The engine, powertrain, and vehicle provided by the embodiments of the present application all have the corresponding beneficial effects of the oil pump provided by the embodiments of the present application, which will not be elaborated here.
[0064] It should be understood that the terms "center", "axial", "circumferential", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.
[0065] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.
Claims
1. An oil pump, characterized in that: comprising a housing, the housing comprising a first shell and a second shell; The first shell has a first end surface, the second shell has a second end surface, the housing has a receiving cavity surrounded by the first shell and the second shell and used to receive lubricating oil, and the first end surface and the second end surface are in contact with each other; The accommodating chamber includes an oil supply area and an oil absorption area; A drainage groove is provided between the first end surface and the second end surface. The drainage groove is located between the oil supply area and the outer side wall of the shell. The drainage groove is communicated with the oil suction area.
2. The oil pump according to claim 1, characterized in that: Also included is an oil pumping mechanism; The accommodating chamber further includes an oil pumping area, the oil pumping mechanism is disposed in the oil pumping area, and the oil suction area and the oil supply area are respectively connected to the oil pumping area.
3. The oil pump according to claim 2, characterized in that: The oil pump mechanism comprises: Rotor; A hollow slider, wherein the hollow slider is sleeved on the outer side of the rotor; A plurality of blades, wherein the plurality of blades are located in the annular space between the hollow slider and the rotor, the plurality of blades are circumferentially spaced apart on the outer side of the rotor, the plurality of blades and the hollow slider are eccentrically arranged, and the plurality of blades, the hollow slider and the rotor enclose a plurality of oil pumping chambers, wherein one of the oil pumping chambers is connected to the oil suction area, and one of the oil pumping chambers is connected to the oil supply area.
4. The oil pump according to claim 3, characterized in that: The rotor comprises a rotating shaft. The first shell is provided with a through hole for the rotating shaft to pass through. The through hole is connected to the accommodating cavity. A sealing member is provided between the through hole and the rotating shaft.
5. The oil pump according to claim 3, characterized in that: The hollow slider is movable in the oil pumping area to change the eccentricity between the hollow slider and the rotor.
6. The oil pump according to claim 5, characterized in that: A moving part is provided on the outer wall of the hollow sliding block, the moving part abuts against the inner wall of the accommodating cavity and can move in a predetermined direction to change the eccentricity; The oil supply area includes a first sub-area, which is located on one side of the predetermined direction of the moving part. The oil suction area includes a second sub-area, which is located on the other side of the predetermined direction of the moving part. A pressure difference can be formed between the first sub-area and the second sub-area to drive the moving part to move.
7. The oil pump according to claim 6, characterized in that: It also includes an elastic member, which is arranged in the second sub-area and clamped between the inner wall of the oil absorption area and the moving part.
8. The oil pump according to claim 6, characterized in that: The oil supply area further includes a third sub-area adapted to communicate with the oil outlet, and the oil suction area further includes a fourth sub-area adapted to communicate with the oil inlet; The drainage groove comprises a first drainage section, and the first drainage section is located between the first sub-region and the outer side wall of the shell; and / or The drainage groove includes a second drainage section, and the first drainage section is located between the third sub-region and the outer side wall of the shell.
9. The oil pump according to claim 8, characterized in that: The drainage groove comprises a first drainage section, the first drainage section is located between the first sub-region and the outer side wall of the shell, and the drainage groove comprises a second drainage section, the first drainage section is located between the third sub-region and the edge of the first end surface; The first sub-region, the third sub-region, the second sub-region and the fourth sub-region are arranged in sequence in the circumferential direction, the first drainage section is connected to the fourth sub-region, and the second drainage section is connected to the second sub-region.
10. The oil pump according to claim 8, characterized in that: The first sub-region is suitable for being connected to one of the oil outlet, the engine main oil channel, and the engine cylinder head.
11. An engine comprising the oil pump according to any one of claims 1 to 10.
12. A power assembly, comprising the engine according to claim 11 or the oil pump according to any one of claims 1 to 10.
13. A vehicle comprising the engine according to claim 11 or the powertrain according to claim 12.