Internal circulation cooling structure of electronic oil pump

Abstract

The internal circulation cooling structure of the electronic oil pump comprises a motor shell, a rotating cavity is formed in the inner side of the motor shell, a first end cover is fixedly connected to one side of the motor shell, an oil inlet hole is formed in one end of the first end cover, and an oil outlet hole is formed in one side of the first end cover. An oil outlet cavity and an oil inlet cavity are formed in one side of the motor shell, an outer rotor and an inner rotor are arranged on the outer side of the oil outlet cavity and the outer side of the oil inlet cavity, the outer side of the inner rotor is meshed with the inner side of the outer rotor, a first circulation hole is formed in the oil outlet cavity, a second circulation hole is formed in the oil inlet cavity, and the first circulation hole and the second circulation hole are communicated with the rotating cavity. According to the electronic oil pump, an oil circulation system is formed in the electronic oil pump, heat generated by the motor shell and a circuit board in the motor shell is taken away through flowing of oil, and therefore effective heat dissipation is achieved, the stability of the electronic oil pump is improved, the service life of the electronic oil pump is prolonged, and performance reduction and fault risks caused by too high temperature are reduced.

Description

Technical Field

[0001] This utility model relates to the field of road roller technology, and in particular to an internal circulation cooling structure for an electronic oil pump. Background Technology

[0002] With the rapid development of the automotive industry, electronic oil pumps are widely used in vehicle lubrication and cooling systems. Electronic oil pumps mainly provide power for vehicle lubrication and cooling systems. Electronic oil pumps include stator-rotor assemblies and circuit board assemblies. Both stator-rotor assemblies and circuit board assemblies generate heat during operation, so the heat dissipation effect of electronic oil pumps is of paramount importance.

[0003] Currently, existing electronic oil pumps generally rely on natural heat dissipation during use. This cooling method suffers from low efficiency and is highly susceptible to external influences, thus affecting the cooling effect of the electronic oil pump. Utility Model Content

[0004] The purpose of this invention is to address the problem that existing oil pumps generally rely on natural heat dissipation, which is inefficient and highly susceptible to external influences, thus affecting the cooling effect of electronic oil pumps. Therefore, this invention proposes an internal circulation cooling structure for electronic oil pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An internal circulation cooling structure for an electronic oil pump includes a motor housing. A rotating cavity is provided inside the motor housing. A first end cap is fixedly connected to one side of the motor housing, with an oil inlet at one end and an oil outlet at one side. An oil outlet chamber and an oil inlet chamber are respectively provided on one side of the motor housing. An outer rotor and an inner rotor are provided outside the oil outlet chamber and the oil inlet chamber, respectively. The outer side of the inner rotor meshes with the inner side of the outer rotor. A first circulation hole is provided in the oil outlet chamber, and a second circulation hole is provided in the oil inlet chamber. The first and second circulation holes communicate with the rotating cavity.

[0007] Furthermore, a sealing ring is fitted on the outer side of the first end cap.

[0008] Furthermore, the diameter of the second circulation hole is larger than that of the first circulation hole.

[0009] Furthermore, the rotating cavity is equipped with a motor stator and a motor rotor, with the motor rotor passing through the motor housing and keyed to the inner rotor.

[0010] Furthermore, a partition end cover is fixedly connected to one side of the motor housing, and a circuit board is fixedly connected to the inner side of the partition end cover.

[0011] Furthermore, a second end cap is fixedly connected to the outer side of the separating end cap.

[0012] Furthermore, a connector is provided on one side of the partition end cap.

[0013] Furthermore, one side of the second end cap is integrally formed with multiple heat dissipation pillars.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In the internal circulation cooling structure of this electronic oil pump, the design of the first circulation hole and the second circulation hole allows the oil flow to circulate within the rotating cavity, improving cooling efficiency. By forming an internal oil circulation system, the flow of oil carries away the heat generated by the motor housing and its internal circuit board, thereby achieving effective heat dissipation, enhancing the stability and service life of the electronic oil pump, and reducing the performance degradation and failure risk caused by excessive temperature.

[0016] 2. The electronic oil pump, through the design of the heat dissipation column, significantly increases the contact area between the second end cap on the electronic oil pump and the air, thereby improving the efficiency of heat conduction to the outside and enhancing the heat dissipation effect of the circuit board. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment 1 of an electronic oil pump internal circulation cooling structure proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of an embodiment 1 of the internal circulation cooling structure of an electronic oil pump proposed in this utility model;

[0019] Figure 3 This is an exploded structural diagram of Embodiment 1 of the internal circulation cooling structure of an electronic oil pump proposed in this utility model;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of Embodiment 2 of the internal circulation cooling structure of an electronic oil pump proposed in this utility model.

[0021] In the diagram: 1. Motor housing; 2. First end cover; 3. Oil inlet; 4. Oil outlet; 5. Sealing ring; 6. Oil outlet chamber; 7. Oil inlet chamber; 8. Outer rotor; 9. Inner rotor; 10. First circulation hole; 11. Second circulation hole; 12. Motor stator; 13. Motor rotor; 14. Separating end cover; 15. Second end cover; 16. Circuit board; 17. Connector; 18. Heat sink. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1

[0024] Reference Figures 1-3 An internal circulation cooling structure for an electronic oil pump includes a motor housing 1, with a rotating cavity on the inner side of the motor housing 1. The structure is characterized in that a first end cover 2 is fixed to one side of the motor housing 1 by bolts, and an oil inlet hole 3 is provided at one end of the first end cover 2. An oil outlet hole 4 is provided on one side of the first end cover 2. An oil outlet cavity 6 and an oil inlet cavity 7 are respectively provided on one side of the motor housing 1. An outer rotor 8 and an inner rotor 9 are provided on the outer side of the oil outlet cavity 6 and the oil inlet cavity 7. The outer side of the inner rotor 9 meshes with the inner side of the outer rotor 8.

[0025] A first circulation hole 10 is provided in the oil outlet chamber 6, and a second circulation hole 11 is provided in the oil inlet chamber 7. The diameter of the second circulation hole 11 is larger than that of the first circulation hole 10. The first circulation hole 10 and the second circulation hole 11 are connected to the rotating cavity. The design of the first circulation hole 10 and the second circulation hole 11 enables the oil flow to circulate in the rotating cavity, thereby improving the cooling efficiency.

[0026] The first end cover 2 is fitted with a sealing ring 5 on its outer side. The rotating cavity contains a motor stator 12 and a motor rotor 13. The motor rotor 13 passes through the motor housing 1 and is keyed to the inner rotor 9. A partition end cover 14 is fixed to one side of the motor housing 1 by bolts. A circuit board 16 is fixed to the inner side of the partition end cover 14 by bolts. A second end cover 15 is fixed to the outer side of the partition end cover 14 by bolts. A connector 17 is provided on one side of the partition end cover 14.

[0027] The working principle of this embodiment is as follows: During use, the rotating magnetic field generated by the motor stator 12 inside the motor housing 1 interacts with the conductor of the motor rotor 13. When three-phase AC power is applied to the winding of the motor stator 12, a rotating magnetic field is generated. This rotating magnetic field cuts the conductor of the motor rotor 13. According to the principle of electromagnetic induction, an induced electromotive force and current are generated in the conductor of the motor rotor 13. Since the conductor of the motor rotor 13 is closed, the current in the magnetic field will be subjected to electromagnetic force. This force will cause the motor rotor 13 to rotate in the direction of the rotating magnetic field. The motor rotor 13 drives the inner rotor 9 to rotate, and the inner rotor 9 drives the outer rotor 8 to rotate, with the speed being faster than that of the outer rotor 8. Multiple mutually closed working chambers are formed between the inner and outer rotors. When each working chamber is at its smallest, it is connected to the oil inlet 3 on the first end cover 2. Subsequently, the volume increases, forming a vacuum and drawing in engine oil. The inner rotor 9 continues to rotate, the volume of the working chamber decreases, and the oil pressure increases. When the working chamber is connected to the oil outlet 4, engine oil is squeezed out.

[0028] Because the pressure in the oil outlet chamber 6 is high, some of the oil is squeezed into the rotating cavity inside the motor housing 1 along the first circulation hole 10 on the oil outlet chamber 6. Meanwhile, the pressure in the oil inlet chamber 7 is low, so the oil is discharged from the second circulation hole 11 on the oil inlet chamber 7. This achieves the flow of oil to cool the motor and at the same time carries away the heat from the circuit board 16 and the motor.

[0029] Example 2

[0030] Reference Figure 4 An internal circulation cooling structure for an electronic oil pump, wherein a plurality of heat dissipation columns 18 are integrally formed on one side of the second end cap 15.

[0031] The working principle of this embodiment is as follows: When in use, multiple heat dissipation columns 18 are provided on the outside of the second end cover 15, which significantly increases the contact area between the second end cover 15 and the air, thereby improving the efficiency of heat conduction to the outside and improving the heat dissipation effect of the circuit board 16.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An internal circulation cooling structure for an electronic oil pump, comprising a motor housing (1), wherein a rotating cavity is provided on the inner side of the motor housing (1), characterized in that, A first end cap (2) is fixedly connected to one side of the motor housing (1), and an oil inlet hole (3) is provided at one end of the first end cap (2). An oil outlet hole (4) is provided on one side of the first end cap (2). An oil outlet chamber (6) and an oil inlet chamber (7) are provided on one side of the motor housing (1). An outer rotor (8) and an inner rotor (9) are provided on the outer side of the oil outlet chamber (6) and the oil inlet chamber (7). The outer side of the inner rotor (9) meshes with the inner side of the outer rotor (8). A first circulation hole (10) is provided in the oil outlet chamber (6), and a second circulation hole (11) is provided in the oil inlet chamber (7). The first circulation hole (10) and the second circulation hole (11) are connected to the rotating cavity.

2. The internal circulation cooling structure of an electronic oil pump according to claim 1, characterized in that, A sealing ring (5) is fitted on the outer side of the first end cap (2).

3. The internal circulation cooling structure of an electronic oil pump according to claim 1, characterized in that, The diameter of the second circulation hole (11) is larger than that of the first circulation hole (10).

4. The internal circulation cooling structure of an electronic oil pump according to claim 1, characterized in that, The rotating cavity is provided with a motor stator (12) and a motor rotor (13), and the motor rotor (13) passes through the motor housing (1) and is keyed to the inner rotor (9).

5. The internal circulation cooling structure of an electronic oil pump according to claim 1, characterized in that, A partition end cover (14) is fixedly connected to one side of the motor housing (1), and a circuit board (16) is fixedly connected to the inner side of the partition end cover (14).

6. The internal circulation cooling structure of an electronic oil pump according to claim 5, characterized in that, A second end cap (15) is fixedly connected to the outside of the partition end cap (14).

7. The internal circulation cooling structure of an electronic oil pump according to claim 6, characterized in that, A connector (17) is provided on one side of the partition end cap (14).

8. The internal circulation cooling structure of an electronic oil pump according to claim 7, characterized in that, The second end cap (15) has multiple heat dissipation columns (18) integrally formed on one side.

Images