Splash-proof oil-cooled motor structure and disc motor

Abstract

The utility model relates to a kind of oil-cooled motor structure and disc motor of anti-splashing.The utility model includes first junction box body, is provided with first sealing structure, first junction box body is set with the mounting hole for connecting pressure relief valve in one end of first sealing structure;Second junction box body is provided with second sealing structure;First junction box body and second junction box body are assembled to form junction box body jointly, first sealing structure and second sealing structure cooperate to form labyrinth structure;Labyrinth structure includes the labyrinth entrance formed with the inner cavity communication of front end cover and rear end cover, multiple blocking structures arranged in order along gas-liquid flow direction and the labyrinth exit communicated with pressure relief valve, multiple blocking structures include multiple through ports set in the direction of labyrinth entrance to labyrinth exit mutual staggered arrangement.Limited to the problems such as that disc motor is under closed oil cooling condition, oil is easy to spray from pressure relief valve and lead to pressure relief is not smooth, pressure relief valve is vulnerable to damage by oil impact and rotor cooling effect is poor etc.

Description

Technical Field

[0001] This utility model relates to the field of disc motor technology, and in particular to a splash-proof oil-cooled motor structure and a disc motor. Background Technology

[0002] Currently, disc motors have attracted widespread attention in low-altitude aircraft and engineering machinery due to their compact structure, flat design, and high power density. These motors typically employ radial or axial flux configurations, offering high space utilization and output torque density, and allowing for flexible arrangement. However, the compact internal structure of disc motors limits heat dissipation paths, making cooling performance a major bottleneck restricting their development into high-power applications.

[0003] Currently, water cooling is the mainstream cooling method for disc motors, while some low-power motors still use air cooling or natural cooling. Although this can reduce the temperature rise of the stator windings, it has limited effect on heat dissipation in the rotor area. In addition, some motors use a structure that cools the rotor by injecting oil into the motor, but this method usually requires external oil pumps, heat sinks and other auxiliary devices, making the system complex and the layout limited, which is not conducive to the integrated design of disc motors.

[0004] In addition, existing technologies also include closed-loop oil-cooling solutions, which cool the rotor through self-circulation of oil inside the motor. However, with such solutions, the high-speed rotation of the rotor causes an increase in internal pressure. When the motor's sealing performance is insufficient, oil can easily spray out from the pressure relief valve, causing the system to be unable to maintain stable oil circulation, resulting in unsatisfactory cooling and potential safety hazards. Summary of the Invention

[0005] To address these issues, this invention provides a splash-proof oil-cooled motor structure and a disc motor, which solves problems such as oil easily spraying out from the pressure relief valve in a closed oil-cooled state, resulting in poor pressure relief, the pressure relief valve being easily damaged by oil impact, and poor rotor cooling effect.

[0006] To solve the above-mentioned technical problems, this utility model provides a splash-proof oil-cooled motor structure, including a front end cover and a rear end cover that cooperate with each other, and further including: The first junction box is located on the front cover. The inner wall of the first junction box is provided with a first sealing structure. The end of the first junction box opposite to the first sealing structure is provided with a mounting hole for connecting a pressure relief valve. The second junction box is located on the rear end cover, and the inner wall of the first junction box is provided with a second sealing structure. The first junction box and the second junction box are assembled together to form the junction box body, and the first sealing structure and the second sealing structure cooperate to form a labyrinth structure. The labyrinth structure includes a labyrinth inlet communicating with the inner cavity formed by the front end cover and the rear end cover, a multi-stage blocking structure arranged sequentially along the gas-liquid flow direction, and a labyrinth outlet communicating with the pressure relief valve. The multi-stage blocking structure includes multiple through-holes that are staggered with each other along the direction from the labyrinth inlet to the labyrinth outlet.

[0007] In one embodiment of this utility model, the multi-stage barrier structure includes multiple baffles spaced apart along the gas-liquid flow direction, and each baffle is provided with the through-hole.

[0008] In one embodiment of this utility model, the maze structure further includes a curved plate connecting the outer ends of each of the baffles. The first and last ends of the curved plate are respectively connected to the inner sidewall of the junction box body. The first end of the curved plate and the inner sidewall of the junction box body form the maze entrance, and the last end of the curved plate and the inner sidewall of the junction box body form the maze exit.

[0009] In one embodiment of this utility model, of two adjacent through openings, one is close to the curved plate and the other is close to the inner wall of the junction box body.

[0010] In one embodiment of this utility model, the through-hole near the entrance of the maze is offset from the entrance of the maze.

[0011] This utility model also provides a disc motor, including the aforementioned splash-proof oil-cooled motor structure.

[0012] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: This utility model discloses a splash-proof oil-cooled motor structure and a disc motor. Addressing the problems of oil easily spraying from the pressure relief valve in a closed oil-cooled state, leading to poor pressure relief, easy damage to the pressure relief valve from oil impact, and poor rotor cooling effect, this invention features a uniquely shaped sealing structure at the junction box of the front and rear covers of the disc motor. The front and rear covers, when assembled, form a ring-shaped labyrinthine channel. This labyrinth structure ensures the motor's sealing performance while preventing oil thrown up by the high-speed rotation of the rotor from directly contacting the pressure relief valve due to the multi-stage labyrinthine obstruction. This ensures the pressure relief valve diaphragm remains unimpacted and operates reliably, while simultaneously allowing the internal pressure of the motor to be discharged normally through the labyrinth channel. This structure is compact and easy to manufacture and assemble, does not affect the motor's installation dimensions or overall layout, and has good versatility and engineering feasibility. Attached Figure Description

[0013] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0014] Figure 1 This is a schematic diagram of one side of the splash-proof oil-cooled motor structure of this utility model.

[0015] Figure 2 This is a structural schematic diagram of the first junction box body of this utility model.

[0016] Figure 3 This is a structural schematic diagram of the second junction box of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of this practical maze.

[0018] Figure 5 This is a schematic diagram of the other side of the splash-proof oil-cooled motor structure of this utility model.

[0019] Explanation of reference numerals on the accompanying drawings: 1. First junction box body; 11. Mounting hole; 12. First sealing structure; 2. Second junction box; 21. Second sealing structure; 3. Junction box body; 4. Maze structure; 41. Maze entrance; 42. Multi-level barrier structure; 421. Through-pass; 422. Baffle; 43. Maze exit; 44. Curved plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0021] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0022] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0023] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0024] Reference Figures 1 to 5 As shown, this utility model discloses a splash-proof oil-cooled motor structure, applied to a disc motor, including a front end cover and a rear end cover that cooperate with each other, and further comprising: The first junction box 1 is located on the front end cover. The inner side wall of the first junction box 1 is provided with a first sealing structure 12. The end of the first junction box 1 facing away from the first sealing structure 12 is provided with a mounting hole 11 for connecting a pressure relief valve. The second junction box 2 is located on the rear end cover, and the inner side wall of the first junction box 1 is provided with a second sealing structure 21; Wherein, the first junction box body 1 and the second junction box body 2 are assembled together to form the junction box body 3, and the first sealing structure 12 and the second sealing structure 21 cooperate to form the labyrinth structure 4. The labyrinth structure 4 includes a labyrinth inlet 41 communicating with the inner cavity formed by the front end cover and the rear end cover, a multi-stage blocking structure 42 arranged sequentially along the gas-liquid flow direction, and a labyrinth outlet 43 communicating with the pressure relief valve. The multi-stage blocking structure 42 includes a plurality of through holes 421 that are staggered with each other along the direction from the labyrinth inlet 41 to the labyrinth outlet 43.

[0025] By designing irregular sealing structures at the junction boxes of the front and rear covers of the disc motor, the front and rear covers, when assembled, form an annular labyrinthine structure channel. This labyrinth structure 4 ensures the motor's sealing performance while preventing the oil thrown up by the high-speed rotation of the rotor from directly contacting the pressure relief valve due to the multi-stage labyrinth barrier effect. This ensures that the diaphragm of the pressure relief valve remains unimpacted and maintains reliable operation, while allowing the internal pressure of the motor to be discharged normally through the labyrinth channel.

[0026] In one embodiment, refer to Figure 4 As shown, the multi-stage barrier structure 42 includes a plurality of baffles 422 spaced apart along the gas-liquid flow direction, and each baffle 422 is provided with the through opening 421.

[0027] In one embodiment, refer to Figure 4As shown, the maze structure 4 also includes a curved plate 44 connecting the outer ends of each of the baffles 422. The two ends of the curved plate 44 are respectively connected to the inner wall of the junction box body 3. The maze entrance 41 is formed between the first end of the curved plate 44 and the inner wall of the junction box body 3, and the maze exit 43 is formed between the second end of the curved plate 44 and the inner wall of the junction box body 3. The curved plate 44 is formed by connecting multiple curved plates.

[0028] In one embodiment, of two adjacent through openings 421, one is close to the curved plate 44, and the other is close to the inner wall of the junction box body 3.

[0029] In one embodiment, the through-hole 421 near the maze entrance 41 is offset from the maze entrance 41.

[0030] Specifically, the first sealing structure 12 is integrally formed with the first junction box 1, and the second sealing structure 21 is integrally cast with the second junction box 2. No additional components or external devices are required, and the installation size and overall layout of the motor are not affected. It has good versatility and engineering feasibility.

[0031] It should be noted that the surfaces of the first sealing structure 12 and the second sealing structure 21 at the joint are smooth, which facilitates the formation of the maze structure 4.

[0032] With the above configuration, the first junction box 1 of the front cover and the second junction box 2 of the rear cover together define the labyrinth structure 4 after assembly. This structure prevents the oil thrown up by the rotor from directly impacting the pressure relief valve, thus avoiding damage to the diaphragm caused by oil penetrating the pressure relief hole. Furthermore, it effectively relieves pressure while blocking oil flow. The labyrinth structure 4 forms a complex network of channels. When the internal air pressure changes due to rotor rotation, the gas can be released to the external environment through the labyrinth gaps, while the oil is effectively blocked by the multi-stage blocking structure 42, preventing oil overflow.

[0033] In summary, the labyrinth structure 4 enables efficient cooling of the motor in a closed oil-cooled environment, especially effectively controlling the temperature rise of the rotor, thereby significantly improving the motor's power density and continuous working capacity; it effectively prevents oil from impacting the pressure relief valve, ensuring the long-term stability of the pressure relief function and extending the service life of the pressure relief valve and the motor as a whole; while maintaining a compact structure, it also takes into account sealing and pressure relief functions, improving the applicability of disc motors in high-performance fields such as aviation and engineering machinery.

[0034] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A splash-proof oil-cooled motor structure, comprising a front end cover and a rear end cover that cooperate with each other, characterized in that, Also includes: The first junction box (1) is located on the front end cover. The inner wall of the first junction box (1) is provided with a first sealing structure (12). The end of the first junction box (1) facing away from the first sealing structure (12) is provided with a mounting hole (11) for connecting a pressure relief valve. The second junction box (2) is located on the rear end cover, and the inner wall of the first junction box (1) is provided with a second sealing structure (21). The first junction box body (1) and the second junction box body (2) are assembled together to form the junction box body (3), and the first sealing structure (12) and the second sealing structure (21) cooperate to form a maze structure (4). The labyrinth structure (4) includes a labyrinth inlet (41) communicating with the inner cavity formed by the front end cover and the rear end cover, a multi-stage blocking structure (42) arranged sequentially along the gas-liquid flow direction, and a labyrinth outlet (43) communicating with the pressure relief valve. The multi-stage blocking structure (42) includes multiple through-holes (421) that are staggered with each other along the direction from the labyrinth inlet (41) to the labyrinth outlet (43).

2. The splash-proof oil-cooled motor structure according to claim 1, characterized in that, The multi-stage barrier structure (42) includes multiple baffles (422) spaced apart along the gas-liquid flow direction, and each baffle (422) is provided with the through opening (421).

3. The splash-proof oil-cooled motor structure according to claim 2, characterized in that, The maze structure (4) also includes a curved plate (44) connecting the outer ends of each of the baffles (422). The two ends of the curved plate (44) are respectively connected to the inner sidewall of the junction box body (3). The maze entrance (41) is formed between the first end of the curved plate (44) and the inner sidewall of the junction box body (3), and the maze exit (43) is formed between the last end of the curved plate (44) and the inner sidewall of the junction box body (3).

4. The splash-proof oil-cooled motor structure according to claim 3, characterized in that, Of the two adjacent through openings (421), one is close to the curved plate (44), and the other is close to the inner wall of the junction box body (3).

5. The splash-proof oil-cooled motor structure according to claim 1, characterized in that, The passage (421) near the maze entrance (41) is misaligned with the maze entrance (41).

6. A disc motor, characterized in that, Includes the splash-proof oil-cooled motor structure as described in any one of claims 1-5.

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