Oil-gas separation structure and axial flux motor

Abstract

The utility model discloses an oil-gas separation structure and axial flux motor. Oil-gas separation structure includes first gas-liquid passage, valve body structure and breathable oil separation piece. First gas-liquid passage has first passageway mouth and second passageway mouth, and the first passageway mouth is suitable for communicating with the motor inside, and at least part of the first gas-liquid passage is arranged in the shape of bending, valve body structure is located at the second passageway mouth, and has the exhaust passage that communicates with the first gas-liquid passage, breathable oil separation piece is arranged in the first gas-liquid passage and / or the exhaust passage, and the breathable oil separation piece is used for separating oil-gas mixture, and makes gas can pass through the breathable oil separation piece to export from the valve body structure outward. The utility model makes the gas in the motor can be discharged through the valve body structure, and the oil liquid is isolated and remains and backflows to the motor inside, avoids the leakage of oil liquid, and can effectively balance the pressure inside and outside the motor, guarantees the normal work of motor, prolongs the service life of motor.

Description

Technical Field

[0001] This utility model relates to the technical field of electric motors, specifically to an oil-gas separation structure and an axial flux motor. Background Technology

[0002] An axial flux motor consists of a rotor structure and stator windings. The rotor and stator windings form an axial flux air gap. During normal operation, the stator coils generate copper losses, the stator core generates iron losses, and the rotor generates permanent magnet eddy current losses. These losses are converted into heat. To ensure normal operation, oil cooling is typically used, where coolant is sprayed onto the rotor to cool it and maintain a normal operating temperature. Because the coolant is distributed openly inside the motor, some coolant mixes with the air, forming an oil-air mixture. When the internal temperature of the motor is high, the internal air pressure also increases, causing some of the oil-air mixture to be forced out from the motor's connections under pressure, resulting in coolant leakage and pollution of the motor and the surrounding environment. Utility Model Content

[0003] To address the aforementioned technical problems, the main objective of this utility model is to provide an oil-gas separation structure and an axial flux motor. This aims to solve the problem that in traditional axial flux motors, when the internal temperature of the motor is high, some oil-gas mixture will be forced out from the various connections of the motor under pressure, causing leakage of cooling oil and resulting in pollution of the motor and the surrounding environment.

[0004] To achieve the above objectives, this utility model proposes an oil-gas separation structure, comprising: The first gas-liquid channel has a first channel opening and a second channel opening that are arranged in a relatively connected manner. The first channel opening is adapted to be connected to the inside of the motor, and at least a portion of the first gas-liquid channel is arranged in a bent shape. The valve body structure is located at the second channel opening and has an exhaust channel that communicates with the first gas-liquid channel; A breathable oil separator is disposed within the first gas-liquid channel and / or the exhaust channel. The breathable oil separator is used to separate the oil-gas mixture and allow gas to pass through the breathable oil separator to be discharged outward from the valve body structure.

[0005] Optionally, the first gas-liquid channel includes: The first channel segment is adapted to extend radially along the motor rotor, and the first channel opening is located at the first end of the first channel segment; The second channel segment is connected at one end to the second end of the first channel segment and is arranged along the side of the first channel segment and is adapted to extend along the axial direction of the motor rotor. The third channel segment is connected to the other end of the second channel segment, and the second channel opening is formed at the end of the third channel segment away from the second channel segment; The first channel opening is oriented in the opposite direction to the second channel opening. The first channel opening is adapted to be oriented towards the circumferential side of the motor rotor, and the second channel opening is adapted to be located on the outside of the motor.

[0006] Optionally, the ventilated oil separator is disposed in the first gas-liquid channel, and the valve body structure is configured as a one-way vent valve.

[0007] Optionally, the valve body structure includes: The valve chamber is detachably located at the second channel opening. The valve chamber is hollow with openings at both ends, and one end of the valve chamber is connected to the second channel opening. A valve cover is provided at the other end of the valve cavity opening and has multiple vent holes that communicate with the inner cavity of the valve cavity, and the inner cavity of the valve cavity and the multiple vent holes form the exhaust channel. A waterproof and breathable membrane is located between the valve cover and the valve cavity, and is provided with an opening at the other end covering the valve cavity; A filter element is filled into the inner cavity of the valve chamber, and the waterproof and breathable membrane and the filter element together form the breathable oil-blocking element.

[0008] Optionally, the valve cavity is screwed to the second channel opening; or, The valve body structure also includes a cover plate, which is detachably installed at the second channel opening and has a through hole communicating with the second channel opening. The valve cavity is screwed to the through hole.

[0009] Optionally, the first gas-liquid channel has a bend in a "labyrinthine" configuration, the bend forming a passage from its starting end to its ending end, the starting end of the bend being connected to the first channel opening, and the ending end of the bend being connected to the second channel opening.

[0010] Optionally, the first channel opening is adapted to be disposed toward the circumferential side of the motor rotor, the bent section is adapted to bend and extend radially along the motor rotor, and the end of the bent section is located above the starting end of the bent section. The first gas-liquid channel further includes a first axial channel connecting the second channel opening and the end of the bent section, the first axial channel being adapted to extend axially from the end of the bent section along the motor rotor.

[0011] Optionally, the first channel opening is adapted to be disposed toward the circumferential side of the motor rotor, and the second channel opening is formed at the end of the bent section, the bent section being adapted to bend and extend along the axial direction of the motor rotor; The first gas-liquid channel further includes a second axial channel connecting the first channel opening and the starting end of the bent section. The second axial channel is adapted to extend along the axial direction of the motor rotor and is located below the bent section.

[0012] This utility model also provides an axial flux motor, comprising: shell; A rotor structure, disposed within the housing, includes a rotating shaft and a rotor disposed on the rotating shaft; Two stator windings are located inside the housing and are symmetrically arranged on both sides of the rotor's axial direction. In the aforementioned oil-gas separation structure, the first gas-liquid channel of the oil-gas separation structure is formed on the outer shell, and the first channel opening of the first gas-liquid channel is disposed facing the peripheral side of the rotor.

[0013] Optionally, the outer casing includes a first housing and a second housing that are connected opposite to each other along the axial direction of the rotor, and a boss protrudes from the outer peripheral side of one of the first housing and the second housing; at least a portion of the first gas-liquid channel is formed on the boss, and the first channel opening is formed at the joint surface of the first housing and the second housing, and the second channel opening is located on the outer end face of the boss.

[0014] The technical solution provided by this utility model has the following beneficial effects: The oil-gas separation structure provided by this utility model includes a first gas-liquid channel, a valve body structure, and a breathable oil separator. The first gas-liquid channel has a first channel opening and a second channel opening that are arranged in a relatively connected manner. The first channel opening is adapted to connect to the inside of the motor, allowing the oil-gas mixture inside the motor to enter the first gas-liquid channel through the first channel opening and exit the motor through the valve body structure located at the second channel opening. Furthermore, by providing the breathable oil separator, when the oil-gas mixture flows through the first gas-liquid channel and the exhaust channel, the gas in the mixture is separated out upon passing through the breathable oil separator, allowing the gas to exit the motor through the valve body structure, while the oil remains isolated in the first gas-liquid channel and flows back into the motor under its own gravity, preventing oil leakage. When the internal air pressure of the motor is high, this oil-gas separation structure can discharge some gas to reduce the internal air pressure of the motor, effectively balancing the internal and external pressures of the motor, ensuring normal motor operation, and extending the motor's service life. Furthermore, by setting at least a portion of the first gas-liquid channel in a bent shape, the length of the first gas-liquid channel can be effectively extended, while increasing the flow resistance of the oil-gas mixture. Tiny oil droplets adhere to the channel and return to the motor cavity with gravity, allowing the oil-gas mixture sufficient time to separate within the first gas-liquid channel, thus ensuring a better oil-gas separation effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A cross-sectional structural schematic diagram of an embodiment of an axial flux motor provided by this utility model; Figure 2 for Figure 1 A magnified structural diagram of detail A in the middle; Figure 3 An enlarged cross-sectional schematic diagram of another embodiment of an oil-gas separation structure provided by this utility model; Figure 4 for Figure 3 A cross-sectional schematic diagram of the oil-gas separation structure described in the figure from another perspective; Figure 5 An enlarged cross-sectional schematic diagram of another embodiment of an oil-gas separation structure provided by this utility model; Figure 6 for Figure 5 A cross-sectional schematic diagram of the oil-gas separation structure described in the figure from another perspective; Figure 7 for Figure 5 A cross-sectional structural schematic diagram of the oil-gas separation structure described in the figure from another perspective.

[0017] Explanation of icon numbers: 1000-Axial flux motor; 100-Oil-gas separation structure; 1-First gas-liquid channel; 11-First channel opening; 12-Second channel opening; 13-First channel section; 14-Second channel section; 15-Third channel section; 16-Bent section; 17-First axial channel; 18-Second axial channel; 2-Valve body structure; 21-Valve cavity; 22-Valve cover; 221-Ventilation hole; 23-Waterproof and breathable membrane; 24-Filled filter element; 25-Cover plate; 3-Breathable oil separator; 200-Outer shell; 210-First shell; 211-Boss; 220-Second shell; 300-Rotor structure; 310-Rotor; 320-Shaft; 400-Stator winding.

[0018] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model provides an oil-gas separation structure 100, which is mainly applicable to motors, especially axial flux motors 1000. When the internal temperature of the motor rises and the gas pressure is high, the oil-gas separation structure 100 can discharge part of the gas in the motor cavity, ensuring the gas pressure balance between the inside and outside of the motor, so that the motor can work normally.

[0023] Specifically, please refer to Figures 1 to 3 In this embodiment, the oil-gas separation structure 100 includes a first gas-liquid channel 1, a valve body structure 2, and a breathable oil separator 3. The first gas-liquid channel 1 has a first channel opening 11 and a second channel opening 12 that are arranged in a relatively connected manner. The first channel opening 11 is adapted to communicate with the inside of the motor, and at least a portion of the first gas-liquid channel 1 is bent. The valve body structure 2 is located at the second channel opening 12 and has an exhaust channel that communicates with the first gas-liquid channel 1. The breathable oil separator 3 is disposed within the first gas-liquid channel 1 and / or the exhaust channel. The breathable oil separator 3 is used to separate the oil-gas mixture and allows gas to pass through the breathable oil separator 3 to be discharged from the valve body structure 2.

[0024] In this embodiment, the first channel 11 is adapted to connect to the inside of the motor, allowing the oil-gas mixture inside the motor to enter the first gas-liquid channel 1 through the first channel 11 and exit the motor through the valve body structure 2 located at the second channel 12. Furthermore, by providing a breathable oil separator 3, when the oil-gas mixture flows through the first gas-liquid channel 1 and the exhaust channel, the breathable oil separator 3 isolates the gas in the mixture, allowing the separated gas to exit the motor through the valve body structure 2, while the oil remains isolated in the first gas-liquid channel 1 and flows back into the motor under its own gravity, ensuring full utilization of the oil and preventing leakage. When the internal air pressure of the motor is high, the oil-gas separation structure 100 can discharge some gas to reduce the internal air pressure of the motor, effectively balancing the pressure inside and outside the motor, ensuring normal motor operation, and extending the motor's service life. Furthermore, by setting at least a portion of the first gas-liquid channel 1 in a bent shape, the length of the first gas-liquid channel 1 can be effectively extended, while increasing the flow resistance of the oil-gas mixture. The oil-gas mixture has a longer residence time in the first gas-liquid channel 1, and tiny oil droplets can better adhere to the channel wall of the first gas-liquid channel 1. As the oil droplets accumulate, they can return to the motor cavity by gravity, allowing the oil to be reused. The oil-gas mixture has sufficient time to separate in the first gas-liquid channel 1, ensuring a better oil-gas separation effect.

[0025] The first gas-liquid channel 1 can be an independent component. For example, the first gas-liquid channel 1 can be a pipe, a cylindrical component, or a box. Alternatively, when the oil-gas separation structure 100 is applied to a motor, the first gas-liquid channel 1 can be integrally formed with the motor housing 200. By forming a channel on the housing 200 to create the first gas-liquid channel 1, the structure becomes more compact and occupies less space in the motor.

[0026] It is understood that, in one embodiment, the ventilated oil-separating element 3 may be disposed only within the valve body structure 2 or only within the first gas-liquid channel 1. Combined with Figure 2 , Figure 3 and Figure 5 As shown in the figure, the dashed arrow indicates the airflow direction. In the direction in which the oil-gas mixture flows along the first gas-liquid channel 1, the oil can be isolated upstream of the ventilated oil separator 3, while the gas can pass through the ventilated oil separator 3 to enter downstream of the ventilated oil separator 3 and then be discharged from the valve body structure 2.

[0027] In another embodiment, such as Figure 2 As shown, the breathable oil separator 3 can also be installed in both the valve body structure 2 and the first gas-liquid channel 1. When the oil-gas mixture flows through the first gas-liquid channel 1, it can undergo the first oil-gas separation through the breathable oil separator 3 in the first gas-liquid channel 1. When it flows through the valve body structure 2, it can undergo the second oil-gas separation through the breathable oil separator 3 in the valve body structure 2. The double separation makes the oil-gas separation more thorough, resulting in cleaner exhaust gas.

[0028] The breathable oil-separating component 3 can be configured as one or more of a waterproof and breathable membrane 23, filter cotton, filter screen, or other oil-absorbing and breathable fillers, so that when the oil-gas mixture passes through the breathable oil-separating component 3, the oil can be isolated, while the gas can pass through the breathable oil-separating component 3.

[0029] Specifically, when a breathable oil separator 3 is provided in the first gas-liquid channel 1, the valve body structure 2 can be configured as a traditional one-way breather valve, allowing the gas passing through the breathable oil separator 3 to be discharged from the one-way breather valve. The valve body structure 2 has a simpler structure and lower cost.

[0030] In another embodiment, regardless of whether a breathable oil separator 3 is provided in the first gas-liquid channel 1, combined with Figure 2 , Figure 4 and Figure 6 As shown, the valve body structure 2 may include a valve cavity 21, a valve cover 22, a waterproof and breathable membrane 23, and a filling filter element 24. The valve cavity 21 is detachably located at the second channel opening 12. By disassembling and assembling the valve cavity 21, the entire valve body structure 2 can be installed at the second channel opening 12 or removed from the second channel opening 12, so as to facilitate the maintenance or replacement of the valve body structure 2.

[0031] The valve cavity 21 is hollow with openings at both ends, and preferably cylindrical. One end of the valve cavity 21 is connected to the second channel port 12. The valve cover 22 is placed over the other end of the valve cavity 21 and has multiple vent holes 221 that communicate with the inner cavity of the valve cavity 21. An exhaust channel is formed between the inner cavity of the valve cavity 21 and the multiple vent holes 221, allowing the oil-gas mixture in the first gas-liquid channel 1 to enter the exhaust channel through the second channel port 12. A waterproof and breathable membrane 23 is located between the valve cover 22 and the valve cavity 21 and covers the other end of the valve cavity 21. A filter element 24 fills the inner cavity of the valve cavity 21. The waterproof and breathable membrane 23 and the filter element 24 on the valve body structure 2 together form a breathable and oil-separating element 3.

[0032] After entering the valve chamber 21, the oil-gas mixture in the first gas-liquid channel 1 flows through the filler filter 24. The filler filter 24 filters out some oil and impurities, allowing the oil-gas mixture containing a small amount of oil to flow to the waterproof and breathable membrane 23. The waterproof and breathable membrane 23 further isolates the oil, forming a clean airflow. The clean airflow then flows into the valve cover 22 and exits through multiple vent holes 221. This effectively removes gas from the motor cavity, reduces the internal air pressure of the motor, ensures the balance of internal and external air pressure, and prevents oil leakage, allowing the cooling oil to be better retained in the motor cavity and avoiding oil loss.

[0033] To facilitate the assembly and disassembly of the valve body structure 2, in one embodiment, the valve cavity 21 is screwed to the second channel opening 12. The valve cavity 21 is connected to the inside of the second channel opening 12 by screwing, making assembly and disassembly simple and convenient. Specifically, in conjunction with... Figure 3 and Figure 4 As shown, an external thread is provided on the outer periphery of the valve cavity 21, and an internal thread is provided in the inner cavity of the second channel port 12 or at the opening of the outer shell 200 corresponding to the second channel port 12. The valve body structure 2 is fixed to the second channel port 12 by the screwing of the external thread and the internal thread.

[0034] In another embodiment, combined Figure 2 , Figure 6 and Figure 7As shown, the valve body structure 2 also includes a cover plate 25. The cover plate 25 is detachably installed at the second channel opening 12 and has a through hole communicating with the second channel opening 12. The valve cavity 21 is screwed into the through hole. The cover plate 25 is generally flat and is installed at the second channel opening 12. The second channel opening 12 is located on the outer surface of the motor housing 200. The cover plate 25 can be connected to the motor housing 200 by screws or bolts. The valve cavity 21 is screwed to the cover plate 25, thus connecting to the second channel opening 12. A threaded hole is provided on the cover plate 25. If the screw connection between the valve body structure 2 and the cover plate 25 fails multiple times, the connection reliability of the valve body structure 2 can be ensured by replacing the cover plate 25. Compared to directly installing the threaded hole on the housing 200, it is not necessary to replace the entire housing 200, resulting in lower maintenance and operating costs.

[0035] Moreover, such as Figure 2 As shown, when a breathable oil separator 3 is provided in the first gas-liquid channel 1, the breathable oil separator 3 can be provided at the second channel opening 12 and covered by a cover plate 25. When the breathable oil separator 3 needs to be replaced after a long period of use, the cover plate 25 can be opened to expose the breathable oil separator 3, making the replacement of the breathable oil separator 3 more convenient and the cleaning of the second channel opening 12 more convenient.

[0036] It is understandable that the configuration of the first gas-liquid channel 1 varies depending on the specific motor design requirements. However, it is crucial to ensure that the first channel opening 11 of the first gas-liquid channel 1 does not face the end face of the rotor 310. This prevents oil from being directly thrown into the first channel opening 11 during high-speed rotation of the rotor 310, which could cause blockage. Preferably, the first channel opening 11 faces the outer peripheral side of the rotor 310. More preferably, the oil-gas separation structure 100 is located at the top of the motor housing 200, so that under high temperature and pressure, the gas flows upwards to better enter the first gas-liquid channel 1. In the following description, for ease of explanation, the example of the oil-gas separation structure 100 being located at the top of the motor housing 200, and the first channel opening 11 of the first gas-liquid channel 1 facing downwards towards the peripheral side of the rotor 310, will be used.

[0037] In one embodiment, combined with Figure 1 and Figure 2As shown, the first gas-liquid channel 1 includes a first channel segment 13, a second channel segment 14, and a third channel segment 15 connected in sequence. The first channel segment 13 is adapted to extend radially along the motor rotor 310, and a first channel opening 11 is located at the first end of the first channel segment 13, facing downward toward the circumferential side of the rotor 310. One end of the second channel segment 14 is connected to the second end of the first channel segment 13, and it is arranged laterally along the first channel segment 13 and adapted to extend axially along the motor rotor 310. Along the axial direction of the rotor 310, the first channel opening 11 is located near the middle of the housing 200, and the second channel segment 14 extends axially toward the edge of the housing 200. The third channel segment 15 is connected to the other end of the second channel segment 14, and a second channel opening 12 is formed at the end of the third channel segment 15 away from the second channel segment 14. The first channel opening 11 faces the opposite direction to the second channel opening 12. The third channel segment 15 extends upward along the axial direction of the rotor 310, so that the second channel opening 12 faces the outer side of the peripheral side of the housing 200. The valve body structure 2 is connected to the peripheral side of the housing 200 for easier connection with the second channel opening 12.

[0038] Of course, multiple sets of the first gas-liquid channel 1 can be provided to improve exhaust efficiency. Multiple first channel segments 13 within the multiple sets of the first gas-liquid channel 1 are arranged in parallel along the circumference of the rotor 310; multiple second channel segments 14 within the multiple sets of the first gas-liquid channel 1 are arranged in parallel along the circumference of the rotor 310; and multiple third channel segments 15 within the multiple sets of the first gas-liquid channel 1 are arranged in parallel along the circumference of the rotor 310. The multiple sets of the first gas-liquid channel 1 can share a single first channel opening 11, or the multiple sets of the first gas-liquid channel 1 can be independently arranged, each having a different first channel opening 11.

[0039] In another embodiment, combined Figures 3 to 5 As shown, the first gas-liquid channel 1 has a bend 16 arranged in a "labyrinthine" pattern, with the bend 16 forming a passage from its starting end to its ending end. Multiple passages from the starting end to the ending end of the bend 16 can be provided. Alternatively, preferably, only one passage from the starting end to the ending end of the bend 16 can be provided, resulting in a higher airflow velocity within the bend 16 and thus higher exhaust efficiency. The starting section of the bend 16 is connected to the first channel opening 11, and the ending section of the bend 16 is connected to the second channel opening 12. The airflow enters the bend section 16 through the first channel opening 11, setting the first gas-liquid channel 1 in a "maze-like" configuration. This effectively increases the length of the first gas-liquid channel 1, making the airflow path longer and the oil-gas mixture stay in the first gas-liquid channel 1 for a longer time. Tiny oil droplets are better retained on the channel wall of the first gas-liquid channel 1, thus accumulating and flowing back into the motor cavity. Meanwhile, the gas can flow better toward the second channel opening 12 and be discharged through the valve body structure 2.

[0040] It is understood that the first gas-liquid channel 1 may have a bend 16 arranged in the horizontal direction, or the first gas-liquid channel 1 may have a bend 16 arranged in the vertical direction. The first gas-liquid channel 1 can be reasonably arranged according to the structure of different motor housings 200.

[0041] Specifically, in one embodiment, combined with Figure 3 and Figure 4 As shown, the bent section 16 is adapted to bend and extend radially along the motor rotor 310, that is, the bent section 16 is bent and extended vertically, and the end of the bent section 16 is located above the beginning of the bent section. The first gas-liquid channel 1 also includes a first axial channel 17 connecting the second channel port 12 and the end of the bent section 16. The first axial channel 17 is adapted to extend axially from the end of the bent section 16 along the motor rotor 310, so that the first axial channel 17 can extend to the surface of the housing 200, thereby allowing the valve body structure 2 to better align with the first gas-liquid channel 1.

[0042] Preferably, the horizontally arranged flow channel section in the bend section 16 can be slightly inclined downwards, so that the oil droplets accumulated in the bend section 16 can flow downwards along the flow channel better and flow out from the first channel opening 11. This avoids oil accumulation in the bend section 16, which could cause blockage of the channel and affect the exhaust effect.

[0043] In another embodiment, combined Figures 5 to 7 As shown, the second channel opening 12 is formed at the end of the bent section 16, and the valve body structure 2 is connected to the end of the bent section 16. The bent section 16 is adapted to bend and extend along the axial direction of the motor rotor 310, that is, the bent section 16 bends and extends in the horizontal direction. The first gas-liquid channel 1 also includes a second axial channel 18 connecting the first channel opening 11 and the starting end of the bent section 16. The second axial channel 18 is adapted to extend along the axial direction of the motor rotor 310 and is located below the bent section 16 to better guide the oil-gas mixture into the bent section 16.

[0044] This utility model also provides an axial flux motor 1000, such as Figure 1 As shown, the axial flux motor 1000 includes a housing 200, a rotor 300, two stator windings 400, and the aforementioned oil-gas separation structure 100. The rotor 300 is disposed within the housing 200 and includes a shaft 320 and a rotor 310 mounted on the shaft 320. The two stator windings 400 are disposed within the housing 200 and symmetrically arranged on both sides of the rotor 310 along its axial direction. A first gas-liquid channel 1 of the oil-gas separation structure 100 is formed on the housing 200, and the first channel opening 11 of the first gas-liquid channel 1 faces the peripheral side of the rotor 310.

[0045] In this embodiment, after the axial flux motor 1000 has been operating for a certain period of time, the internal rotor 300 and stator winding 400 will generate heat, which will increase the air pressure inside the motor cavity. When the air pressure is too high, some of the gas can be discharged through the oil-gas separation structure 100 to ensure the air pressure balance inside and outside the axial flux motor 1000 and ensure that the motor can continue to work normally.

[0046] Furthermore, the outer casing 200 includes a first housing 210 and a second housing 220 that are connected relative to each other along the axial direction of the rotor 310. A boss 211 protrudes from the outer peripheral side of one of the first housing 210 and the second housing 220. At least a portion of the first gas-liquid channel 1 is formed on the boss 211, and the first channel opening 11 is formed at the mating surface of the first housing 210 and the second housing 220. The second channel opening 12 is provided on the outer end face of the boss 211, making the oil-gas separation structure 100 and the outer casing 200 more compact, without occupying too much space in the axial flux motor 1000, and ensuring that the overall volume of the axial flux motor 1000 does not increase.

[0047] For example, a first groove is formed on the end face of the first housing 210 facing the second housing 220. The first groove extends radially along the rotor 310, and the opening of the first groove faces the second housing 220 and is closed by the second housing 220. A first channel opening 11 is formed on the side of the first groove facing the peripheral sidewall of the rotor 310. The first groove is formed on the first housing 210 and forms part of the first gas-liquid channel 1, so that the oil-gas separation structure 100 can be better integrated with the outer casing 200 and arranged more compactly.

[0048] In addition, the axial flux motor 1000 also includes oil cooling channels, which include a first cooling channel on the first housing 210 and a second cooling channel on the second housing 220, and the first and second cooling channels are symmetrically arranged about the rotor 310. The first housing 210 is provided with a first oil inlet, and the second housing 220 is provided with a second oil inlet. An oil collecting chamber is also provided at the bottom of the first housing 210 and the second housing 220, which is connected to the cavity where the rotor 310 is located, and an oil outlet is provided at the bottom of the oil collecting chamber. One end of the first cooling channel is connected to the first oil inlet, and the other end is set towards one axial end face of the rotor 310. One end of the second cooling channel is connected to the second oil inlet, and the other end is set towards the other axial end face of the rotor 310.

[0049] The oil outlet, first oil inlet, and second oil inlet are all suitable for connection to an external suction device. Cooling oil can enter the first and second oil inlets under the suction of the device, allowing the oil to be sprayed towards the two axial end faces of the rotor 310 through the first and second cooling channels, respectively, thus cooling the rotor 310. Furthermore, the high-speed rotation of the rotor 310 causes the cooling oil to splash, ensuring it covers the entire axial end face of the rotor 310, resulting in even better cooling. Under its own gravity, the cooling oil flows downwards to collect in the oil collection chamber, and then flows out from the oil outlet under the suction of the device. It then flows through the radiator and / or filter for further cooling and filtration, before re-entering the motor for repeated recycling. Furthermore, during the operation of rotor 310, some oil can mix with air to form an oil-gas mixture. When the internal air pressure of axial flux motor 1000 is too high, the oil-gas mixture can be discharged to the outside of housing 200 through oil-gas separation structure 100, thereby better regulating the air pressure balance inside and outside axial flux motor 100.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. An oil-gas separation structure, characterized in that, include: The first gas-liquid channel has a first channel opening and a second channel opening that are arranged in a relatively connected manner. The first channel opening is adapted to be connected to the inside of the motor, and at least a portion of the first gas-liquid channel is arranged in a bent shape. The valve body structure is located at the second channel opening and has an exhaust channel that communicates with the first gas-liquid channel; A breathable oil separator is disposed within the first gas-liquid channel and / or the exhaust channel. The breathable oil separator is used to separate the oil-gas mixture and allow gas to pass through the breathable oil separator to be discharged outward from the valve body structure.

2. The oil-gas separation structure as described in claim 1, characterized in that, The first gas-liquid channel includes: The first channel segment is adapted to extend radially along the motor rotor, and the first channel opening is located at the first end of the first channel segment; The second channel segment is connected at one end to the second end of the first channel segment and is arranged along the side of the first channel segment and is adapted to extend along the axial direction of the motor rotor. The third channel segment is connected to the other end of the second channel segment, and the second channel opening is formed at the end of the third channel segment away from the second channel segment; The first channel opening is oriented in the opposite direction to the second channel opening. The first channel opening is adapted to be oriented towards the circumferential side of the motor rotor, and the second channel opening is adapted to be located on the outside of the motor.

3. The oil-gas separation structure as described in claim 1, characterized in that, The breathable oil separator is located in the first gas-liquid channel, and the valve body structure is configured as a one-way breathable valve.

4. The oil-gas separation structure as described in claim 1, characterized in that, The valve body structure includes: The valve chamber is detachably located at the second channel opening. The valve chamber is hollow with openings at both ends, and one end of the valve chamber is connected to the second channel opening. A valve cover is provided at the other end of the valve cavity opening and has multiple vent holes that communicate with the inner cavity of the valve cavity, and the inner cavity of the valve cavity and the multiple vent holes form the exhaust channel. A waterproof and breathable membrane is located between the valve cover and the valve cavity, and is provided with an opening at the other end covering the valve cavity; A filter element is filled into the inner cavity of the valve chamber, and the waterproof and breathable membrane and the filter element together form the breathable oil-blocking element.

5. The oil-gas separation structure as described in claim 4, characterized in that, The valve chamber is screwed to the second channel opening; or... The valve body structure also includes a cover plate, which is detachably installed at the second channel opening and has a through hole communicating with the second channel opening. The valve cavity is screwed to the through hole.

6. The oil-gas separation structure as described in claim 1, characterized in that, The first gas-liquid channel has a bend in a "labyrinthine" configuration, the bend forming a passage from its starting end to its ending end, the starting end of the bend being connected to the opening of the first channel, and the ending end of the bend being connected to the opening of the second channel.

7. The oil-gas separation structure as described in claim 6, characterized in that, The first channel opening is adapted to be disposed facing the circumferential side of the motor rotor, the bent section is adapted to bend and extend radially along the motor rotor, and the end of the bent section is located above the starting end of the bent section. The first gas-liquid channel further includes a first axial channel connecting the second channel opening and the end of the bent section, the first axial channel being adapted to extend axially from the end of the bent section along the motor rotor.

8. The oil-gas separation structure as described in claim 6, characterized in that, The first channel opening is adapted to be disposed toward the circumferential side of the motor rotor, and the second channel opening is formed at the end of the bent section, which is adapted to bend and extend along the axial direction of the motor rotor; The first gas-liquid channel further includes a second axial channel connecting the first channel opening and the starting end of the bent section. The second axial channel is adapted to extend along the axial direction of the motor rotor and is located below the bent section.

9. An axial flux motor, characterized in that, include: shell; A rotor structure, disposed within the housing, includes a rotating shaft and a rotor disposed on the rotating shaft; Two stator windings are located inside the housing and are symmetrically arranged on both sides of the rotor's axial direction. The oil-gas separation structure as described in any one of claims 1 to 8, wherein a first gas-liquid channel of the oil-gas separation structure is formed on the outer shell, and the first channel opening of the first gas-liquid channel is disposed facing the peripheral side surface of the rotor.

10. The axial flux motor as described in claim 9, characterized in that, The outer casing includes a first housing and a second housing that are connected opposite to each other along the axial direction of the rotor. A boss protrudes from the outer peripheral side of one of the first housing and the second housing. At least a portion of the first gas-liquid channel is formed on the boss, and the first channel opening is formed at the joint surface of the first housing and the second housing. The second channel opening is located on the outer end face of the boss.

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