Oil cooling motor with oil injection cooling structure
By introducing an oil-injection cooling structure into the oil-cooled motor, the problems of stator heat dissipation affecting magnetic circuit smoothness and insufficient bearing heat dissipation are solved, achieving efficient heat dissipation and high torque output of the motor.
Patent Information
- Application Number
- CN202422987640.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-05
AI Technical Summary
The internal heat dissipation channels of the stator in existing oil-cooled motors affect the smooth flow of the magnetic circuit, resulting in limited torque. Furthermore, the heat dissipation problem of the bearings on the end face of the motor spindle is neglected, which affects the motor performance.
The oil-cooled motor with an oil spray cooling structure achieves dual-channel heat dissipation for the stator coil and bearings by setting an oil spray ring and oil spray holes on the inner wall of the upper housing. The oil spray ring, made of a mixture of nylon and glass fiber, is used for cooling to ensure unobstructed magnetic circuit.
A compact structural design was achieved, which improved the heat dissipation of the stator coils and bearings, ensuring the high torque output and cooling effect of the motor.
Smart Images
Figure CN223488000U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an oil-cooled motor, or more precisely, an oil-cooled motor with an oil spray cooling structure. Background Technology
[0002] Existing oil-cooled motors typically have dedicated heat dissipation channels inside the stator. This structure can affect the smooth flow of the magnetic circuit, thus limiting the motor's torque. Furthermore, current motor cooling systems often focus on stator heat dissipation, neglecting the heat dissipation of the end-face bearings of the motor spindle, which negatively impacts motor performance. Utility Model Content
[0003] Therefore, it is necessary to provide an oil-cooled motor with an oil injection cooling structure to address the above-mentioned technical problems.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] An oil-cooled motor with an oil-injection cooling structure is characterized in that the oil-cooled motor with the oil-injection cooling structure includes a housing, the housing comprising a cylindrical upper housing and a box-shaped oil housing, the upper housing housing housing a stator and a rotor, the rotor having a rotor shaft at its center, and bearings at both ends of the rotor shaft.
[0006] The inner wall of the upper housing is provided with a pair of opposing oil injection rings. Each oil injection ring includes an annular oil injection base ring. The outer wall of the oil injection base ring is provided with a plurality of oil inlet holes and a plurality of outer oil baffles. The oil inlet holes and outer oil baffles are circumferentially distributed. The outer wall of the oil injection base ring is also provided with oil injection holes. The inner wall of the oil injection base ring is provided with an oil injection pipe. The oil injection pipe is connected to the oil injection holes. Both sides of the oil injection holes are provided with inner oil baffles.
[0007] In a preferred embodiment of this utility model, the size of the injection hole is larger than that of the inlet hole.
[0008] In a preferred embodiment of this utility model, the extension direction of the fuel injection pipe is toward the bearing.
[0009] In a preferred embodiment of this utility model, a sealing ring is provided between the end face of the oil injection ring and the end face of the stator.
[0010] In a preferred embodiment of the present invention, the top of the upper housing is provided with an oil inlet, the oil inlet is provided with an oil nozzle, and the inner wall of the upper housing is provided with a plurality of axially arranged cooling channels.
[0011] In a preferred embodiment of this invention, the oil spray ring is made of a mixture of nylon and glass fiber. Compared with the prior art, this invention has the following advantages:
[0012] This utility model provides an oil-cooled motor with an oil spray cooling structure. The oil-cooled motor with an oil spray cooling structure has a compact structure and achieves a dual-channel heat dissipation structure through an oil spray ring, which dissipates heat and cools the coil and bearing respectively. It has a good cooling effect and strong practicality. Attached Figure Description
[0013] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0014] Figure 1 This is a three-dimensional structural diagram of the oil-cooled motor with an oil spray cooling structure according to this utility model;
[0015] Figure 2 for Figure 1 A three-dimensional structural diagram of an oil-cooled motor with an oil-spraying cooling structure, shown from another perspective;
[0016] Figure 3 for Figure 2 A cross-sectional view of the oil-cooled motor along line AA;
[0017] Figure 4 for Figure 3 A magnified view of the details of region B in the diagram;
[0018] Figure 5 for Figure 3 A partial three-dimensional structural diagram of the oil-cooled motor in the image;
[0019] Figure 6 for Figure 5 A magnified view of the details of region C in the diagram;
[0020] Figure 7 for Figure 5 A three-dimensional exploded view of the oil-cooled motor in the diagram;
[0021] Figure 8 for Figure 7 A three-dimensional structural diagram of the oil injection ring of the oil-cooled motor in the image;
[0022] Figure 9 for Figure 8 A magnified view of the details of region D in the diagram;
[0023] Figure 10 for Figure 3 A schematic diagram of the stator structure of an oil-cooled motor.
[0024] The markings in the diagram are explained as follows: 1. Housing; 11. Upper housing; 111. Oil inlet; 112. Cooling channel; 12. Oil housing; 2. Stator; 3. Rotor; 4. Rotor shaft; 41. Bearing; 5. Injection ring; 51. Injection base ring; 52. Oil inlet hole; 53. Injection hole; 54. Injection pipe; 55. Inner oil baffle flange; 56. Outer oil baffle flange; 7. Sealing ring; 8. Oil nozzle. Detailed Implementation
[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0026] like Figures 1 to 9 As shown, the oil-cooled motor with an oil spray cooling structure includes a housing 1, which includes a cylindrical upper housing 11 and a box-shaped oil housing 12. The upper housing 11 contains a stator 2 and a rotor 3. The rotor 3 has a rotor shaft 4 at its center, and bearings 41 are provided at both ends of the rotor shaft 4.
[0027] It should be noted that the upper housing 11 and the stator 2 are fitted with an interference fit.
[0028] The inner wall of the upper housing 11 is provided with a pair of oppositely arranged oil injection rings 5. The oil injection ring 5 includes an annular oil injection base ring 51. The outer wall of the oil injection base ring 51 is provided with a plurality of oil inlet holes 52 and a plurality of outer oil baffles 56. The oil inlet holes 52 and the outer oil baffles 56 are circumferentially distributed. The outer wall of the oil injection base ring 51 is also provided with an oil injection hole 53. The inner wall of the oil injection base ring 51 is provided with an oil injection pipe 54. The oil injection pipe 54 is connected to the oil injection hole 53. The two sides of the oil injection hole 53 are provided with inner oil baffles 55.
[0029] The top of the upper housing 11 is provided with an oil inlet 111, and an oil nozzle 8 is provided on the oil inlet 111. The inner wall of the upper housing 11 is provided with a plurality of axially arranged cooling channels 112.
[0030] It should be noted that the size of the oil injection hole 53 is larger than that of the oil inlet hole 52. The extension direction of the oil injection pipe 54 is toward the bearing 41.
[0031] In addition, a sealing ring 7 is provided between the end face of the oil injection ring 5 and the end face of the stator 2, which can achieve end face sealing and realize closed oil passage. The oil directly passes through the surface of the stator 2, resulting in good heat dissipation.
[0032] In addition, the oil injection ring 5 is made of a mixture of nylon and glass fiber, which is lightweight and reduces the weight of the motor.
[0033] like Figure 10 As shown, the stator 2 no longer has a dedicated heat dissipation slot on its end face, ensuring unobstructed magnetic circuit, simplifying assembly, and enabling high torque output.
[0034] The following describes the working principle of the oil-cooled motor with an oil spray cooling structure.
[0035] like Figure 3 As shown, cooling oil enters from the oil inlet 8 into the oil inlet 111, and then flows through the cooling channel 112 into the area where the oil injection ring 5 is located. At this point, the cooling oil splits into two streams. The first stream enters the oil inlet 52 and directly cools the coils of the stator 2. The second stream enters the oil injection hole 53 and then the oil injection pipe 54, directly cooling the bearing 41 below. Finally, both streams of cooling oil enter the oil housing 12 for further circulation.
[0036] It should be noted that, with the help of the outer oil baffle flange 56 and the inner oil baffle flange 55, and because the size of the oil injection hole 53 is larger than that of the oil inlet hole 52, the oil flow rate at the top of the oil injection ring 5 is ensured to be at its maximum, while the flow rate around the perimeter is kept almost equal, thus ensuring the heat dissipation effect.
[0037] This oil-cooled motor with an oil-injection cooling structure is compact and achieves a dual-channel heat dissipation structure through an oil injection ring, which dissipates heat and cools the coil and bearings respectively, resulting in good cooling effect and strong practicality.
[0038] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.
Claims
1. An oil-cooled motor with an oil-injection cooling structure, characterized in that, The oil-cooled motor with oil spray cooling structure includes a housing (1), which includes a cylindrical upper housing (11) and a box-shaped oil housing (12). The upper housing (11) is provided with a stator (2) and a rotor (3). The rotor (3) has a rotor shaft (4) at its center, and bearings (41) are provided at both ends of the rotor shaft (4). The inner wall of the upper housing (11) is provided with a pair of oppositely arranged oil injection rings (5). The oil injection rings (5) include an annular oil injection base ring (51). The outer wall of the oil injection base ring (51) is provided with a plurality of oil inlet holes (52) and a plurality of outer oil baffles (56). The oil inlet holes (52) and the outer oil baffles (56) are circumferentially distributed. The outer wall of the oil injection base ring (51) is also provided with an oil injection hole (53). The inner wall of the oil injection base ring (51) is provided with an oil injection pipe (54). The oil injection pipe (54) is connected to the oil injection hole (53). The two sides of the oil injection hole (53) are provided with inner oil baffles (55).
2. The oil-cooled motor with an oil-injection cooling structure according to claim 1, characterized in that, The size of the oil injection hole (53) is larger than that of the oil inlet hole (52).
3. The oil-cooled motor with an oil-injection cooling structure according to claim 1, characterized in that, The extension direction of the oil injection pipe (54) is toward the bearing (41).
4. The oil-cooled motor with an oil-injection cooling structure according to claim 1, characterized in that, A sealing ring (7) is provided between the end face of the oil injection ring (5) and the end face of the stator (2).
5. The oil-cooled motor with an oil-injection cooling structure according to claim 1, characterized in that, The top of the upper housing (11) is provided with an oil inlet (111), and an oil nozzle (8) is provided on the oil inlet (111). The inner wall of the upper housing (11) is provided with several axially arranged cooling channels (112).
6. The oil-cooled motor with an oil-injection cooling structure according to claim 1, characterized in that, The oil spray ring (5) is a mixture of nylon and glass fiber.