Motor and aircraft

Abstract

The invention discloses a motor and an aircraft, the motor comprises a shell, the shell is provided with a liquid inlet, a first cavity and a second cavity, the first cavity and the second cavity are arranged at intervals, the second cavity is sleeved with the first cavity, the liquid inlet is communicated with the first cavity, and in the axial direction of the motor, the two ends of the first cavity are open, and the two ends of the second cavity are open; the stator is located in the first cavity; the rotor assembly is located in the second cavity; the first end cover and the second end cover are located at the two ends of the shell respectively in the axial direction of the motor and connected with the shell, the first end cover and the second end cover are used for blocking the first cavity and the second cavity, the first end cover is provided with a third cavity, and the second end cover is provided with a fourth cavity and a liquid outlet; the third cavity is respectively communicated with the first cavity and the second cavity, and the fourth cavity is respectively communicated with the second cavity and the liquid outlet. According to the motor provided by the invention, the cooling liquid continuously flows between the stator and the rotor assembly, so that the motor efficiency and the heat dissipation efficiency are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a motor and an aircraft. Background Art

[0002] In order to ensure the efficient operation of the motor, it is necessary to cool down the stator and the rotor. In the prior art, the stator and the rotor are usually cooled by spraying oil into the stator while the rotating shaft of the rotor is rotating. However, spraying oil during the rotation of the rotating shaft will offset part of the rotating power of the rotor, affecting the motor efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a motor, which can ensure the efficiency of the motor while cooling down the stator and the rotor assembly, and realizes the continuous flow of the coolant between the stator and the rotor assembly, ensuring the rapid transfer and dissipation of heat and improving the heat dissipation efficiency.

[0004] The present invention also provides an aircraft, which includes the above-mentioned motor.

[0005] The motor according to an embodiment of the present invention includes: a housing having a liquid inlet, a first cavity and a second cavity spaced apart from each other, the first cavity being sleeved outside the second cavity, the liquid inlet being communicated with the first cavity, both ends of the first cavity being open along the axial direction of the motor, and both ends of the second cavity being open; a stator located in the first cavity; a rotor assembly located in the second cavity; a first end cover and a second end cover, the first end cover and the second end cover being respectively located at both ends of the housing and connected to the housing along the axial direction of the motor, the first end cover and the second end cover being used to seal the first cavity and the second cavity, the first end cover having a third cavity, the second end cover having a fourth cavity and a liquid outlet, the third cavity being communicated with the first cavity and the second cavity respectively, and the fourth cavity being communicated with the second cavity and the liquid outlet respectively.

[0006] A motor according to an embodiment of the present invention has a housing with a liquid inlet, and a first cavity and a second cavity arranged at intervals. The first cavity is sleeved outside the second cavity. The liquid inlet is communicated with the first cavity. Along the axial direction of the motor, both ends of the first cavity are open, and both ends of the second cavity are open. A stator is located in the first cavity, and a rotor assembly is located in the second cavity. Along the axial direction of the motor, a first end cover and a second end cover are respectively located at both ends of the housing and connected to the housing. The first end cover and the second end cover are used to seal the first cavity and the second cavity. The first end cover has a third cavity, and the second end cover has a fourth cavity and a liquid outlet. The third cavity is communicated with the first cavity and the second cavity respectively, and the fourth cavity is communicated with the second cavity and the liquid outlet respectively.

[0007] During the operation of the motor, while cooling and cooling the stator and the rotor assembly, the efficiency of the motor is ensured, the reliability and service life of the motor are improved, and the stability and performance of the motor under long-term high-load operation are ensured. At the same time, since the coolant flows through the cooling flow path composed of the first cavity, the third cavity, the second cavity and the fourth cavity, the continuous flow of the coolant between the stator and the rotor assembly is ensured, and the rapid transfer and dissipation of heat are ensured, and the heat dissipation efficiency is improved. In addition, the first cavity and the second cavity are two independent cooling regions, and the coolant circulates in their respective cavities without mixing or interfering with each other. Therefore, the coolant flow rate and pressure in the first cavity and the second cavity can be independently controlled according to motors with different performances, so as to more precisely meet the respective cooling requirements of the stator and the rotor assembly, and further improve the heat dissipation effect and versatility of the motor.

[0008] In some embodiments of the present invention, the housing includes: a housing body, both ends in the length direction of the housing body are respectively connected to the first end cover and the second end cover, and the housing body has the liquid inlet; a liquid separation sleeve, the liquid separation sleeve is spaced apart from the housing body, and the inner wall of the housing body and the outer wall of the liquid separation sleeve define the first cavity, and the inner wall of the liquid separation sleeve defines the second cavity.

[0009] In some embodiments of the present invention, the first end cover has a first sealing groove on the side facing the second end cover, and one end of the liquid separation sleeve close to the first end cover extends into the first sealing groove; and / or, the second end cover has a second sealing groove on the side facing the first end cover, and one end of the liquid separation sleeve close to the second end cover extends into the second sealing groove.

[0010] In some embodiments of the present invention, the rotor assembly includes: a rotating shaft having a first flow channel, a second flow channel, and a third flow channel. The first flow channel and the third flow channel are respectively located at two ends of the second flow channel along the axial direction of the rotating shaft. The second flow channel is formed on the outer peripheral surface of the rotating shaft. One end of the first flow channel communicates with the third cavity, and the other end communicates with the second flow channel. One end of the third flow channel communicates with the fourth cavity, and the other end communicates with the second flow channel; a plurality of permanent magnets extending along the axial direction of the motor, and the plurality of permanent magnets are arranged along the circumferential direction of the motor and are surface-mounted on the outer peripheral surface of the rotating shaft.

[0011] In some embodiments of the present invention, the second flow channel is one and spirally extends along the axial direction of the rotating shaft; or, the second flow channel includes a plurality of sub-channels, and the plurality of sub-channels are arranged at intervals along the circumferential direction of the rotating shaft. The sub-channels extend along the axial direction of the rotating shaft, and both ends in the length direction of each sub-channel communicate with the first flow channel and the third flow channel respectively.

[0012] In some embodiments of the present invention, the rotating shaft includes a shaft body, a first journal, and a second journal. Along the axial direction of the motor, the shaft body is located between the first journal and the second journal and is respectively connected to the first journal and the second journal. The second flow channel is formed on the outer peripheral surface of the shaft body, and the plurality of permanent magnets are surface-mounted on the outer peripheral surface of the shaft body. The first flow channel includes a first sub-flow channel and a plurality of second sub-flow channels. A part of the first sub-flow channel is formed on the shaft body and a part of the first sub-flow channel is formed on the first journal. One end of the first sub-flow channel communicates with the second flow channel, and the other end communicates with the plurality of second sub-flow channels. One end of each second sub-flow channel away from the first sub-flow channel extends to the outer peripheral surface of the first journal to form a first through hole. The plurality of first through holes are arranged at intervals along the circumferential direction of the rotating shaft and all communicate with the third cavity; and / or, the third flow channel includes a third sub-flow channel and a plurality of fourth sub-flow channels. A part of the third sub-flow channel is formed on the shaft body and a part of the third sub-flow channel is formed on the second journal. One end of the third sub-flow channel communicates with the second flow channel, and the other end communicates with the plurality of fourth sub-flow channels. One end of each fourth sub-flow channel away from the third sub-flow channel extends to the outer peripheral surface of the second journal to form a second through hole. The plurality of second through holes are arranged at intervals along the circumferential direction of the rotating shaft and all communicate with the fourth cavity.

[0013] In some embodiments of the present invention, the rotor assembly further includes: a first bearing sleeved outside the first journal and located in the third cavity; a second bearing sleeved outside the second journal and located in the fourth cavity.

[0014] In some embodiments of the present invention, it further includes: a first oil seal assembly, the first oil seal assembly includes two first oil seal members, the two first oil seal members are respectively located at both ends of the third cavity along the axial direction of the motor, and are used to seal the third cavity, and the first journal passes through the two first oil seal members; a second oil seal assembly, the second oil seal assembly includes two second oil seal members, the two second oil seal members are respectively located at both ends of the fourth cavity along the axial direction of the motor, and are used to seal the fourth cavity, and the second journal passes through the two second oil seal members.

[0015] In some embodiments of the present invention, the rotor assembly further includes a shaft sleeve, the shaft sleeve is located between the shaft and the plurality of magnets; and / or, the rotor assembly further includes a magnet sleeve, the magnet sleeve is located in the second cavity and sleeved outside the plurality of magnets.

[0016] In some embodiments of the present invention, the first end cover further has a filtering cavity, the filtering cavity is respectively communicated with the first cavity and the third cavity, and a filtering component is arranged in the filtering cavity for filtering the coolant flowing from the first cavity into the filtering cavity.

[0017] In some embodiments of the present invention, the inner wall surface of the filtering cavity has a first communication hole, a second communication hole and an opening, the first communication hole is used to communicate the filtering cavity and the first cavity, the second communication hole is used to communicate the filtering cavity and the third cavity, the opening is opened on the side of the first end cover away from the second end cover, and the first end cover further includes a cover plate for blocking the opening.

[0018] In some embodiments of the present invention, the liquid inlet is located on the side close to the second end cover along the axial direction of the motor.

[0019] The aircraft according to the embodiment of the present invention includes the above-mentioned motor.

[0020] For the aircraft according to the embodiment of the present invention, when the motor is provided, when the motor provides power for the aircraft, since the coolant flows through the cooling flow path composed of the first cavity, the third cavity, the second cavity and the fourth cavity, so that the coolant continuously flows between the stator and the rotor assembly, ensuring the rapid transfer and dissipation of heat, improving the heat dissipation efficiency, thereby while realizing the cooling and temperature reduction of the stator and the rotor assembly, ensuring the efficiency of the motor, improving the reliability and service life of the motor, ensuring the stability and performance of the motor under long-term high-load operation, and further maintaining the stable output of power, improving the reliability and safety of the aircraft.

[0021] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 is a front view of a motor according to an embodiment of the present invention;

[0024] Figure 2 is Figure 1 a sectional view taken along line A-A in;

[0025] Figure 3 is a front view of a rotor assembly according to an embodiment of the present invention;

[0026] Figure 4 is Figure 3 a sectional view taken along line B-B in;

[0027] Figure 5 is Figure 4 an enlarged view at D in;

[0028] Figure 6 is an exploded view of a rotor assembly according to an embodiment of the present invention;

[0029] Figure 7 is an exploded schematic view of a rotor assembly, a first end cover, a second end cover, a liquid separation sleeve, a first oil seal assembly, a second oil seal assembly, a first bearing and a second bearing according to an embodiment of the present invention;

[0030] Figure 8 is Figure 2 an enlarged view at C in;

[0031] Figure 9 is an exploded view of a partial structure of a motor according to an embodiment of the present invention;

[0032] Figure 10 is Figure 9 an enlarged view at E in;

[0033] Figure 11 is a structural diagram of a second end cover of a motor according to an embodiment of the present invention.

[0034] Reference Numerals:

[0035] 100, motor;

[0036] 1, housing; 11, housing body; 111, liquid inlet; 12, liquid separation sleeve; 13, first cavity; 14, second cavity;

[0037] 2, stator;

[0038] 3. Rotor assembly; 31. Rotating shaft; 311. Shaft body; 312. First journal; 313. Second journal; 314. First flow channel; 3141. First sub-flow channel; 3142. Second sub-flow channel; 3143. First through hole; 315. Second flow channel; 316. Third flow channel; 3161. Third sub-flow channel; 3162. Fourth sub-flow channel; 3163. Second through hole; 32. Magnet; 33. Rotating shaft sleeve; 34. Magnet sleeve; 35. Magnetic isolation plate;

[0039] 4. First end cover; 41. Third cavity; 42. First sealing groove; 43. Filter cavity; 431. First communication hole; 432. Second communication hole; 433. Opening; 44. Filter assembly; 45. Cover plate;

[0040] 5. Second end cover; 51. Fourth cavity; 52. Liquid outlet; 53. Second sealing groove;

[0041] 6. First oil seal assembly; 61. First oil seal; 62. First oil seal bracket;

[0042] 7. Second oil seal assembly; 71. Second oil seal; 72. Second oil seal bracket;

[0043] 81. First connecting piece; 82. Second connecting piece;

[0044] 91. First bearing; 92. Second bearing. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0046] The motor 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0047] As Figure 1 and Figure 2 shown, the motor 100 according to an embodiment of the present invention includes a housing 1, a stator 2, a rotor assembly 3, a first end cover 4, and a second end cover 5.

[0048] Among them, the housing 1 has a liquid inlet 111, and a first cavity 13 and a second cavity 14 which are spaced apart. The first cavity 13 is sleeved outside the second cavity 14. The liquid inlet 111 is communicated with the first cavity 13. Along the axial direction of the motor 100, both ends of the first cavity 13 are open, and both ends of the second cavity 14 are open. The stator 2 is located in the first cavity 13, and the rotor assembly 3 is located in the second cavity 14. Along the axial direction of the motor 100, the first end cover 4 and the second end cover 5 are respectively located at both ends of the housing 1 and connected to the housing 1. The first end cover 4 and the second end cover 5 are used to seal the first cavity 13 and the second cavity 14. The first end cover 4 has a third cavity 41, and the second end cover 5 has a fourth cavity 51 and a liquid outlet 52. The third cavity 41 is respectively communicated with the first cavity 13 and the second cavity 14, and the fourth cavity 51 is respectively communicated with the second cavity 14 and the liquid outlet 52.

[0049] Thus, the coolant enters the first cavity 13 through the liquid inlet 111, cools the stator 2 and then flows into the third cavity 41. The coolant in the third cavity 41 flows into the second cavity 14 to cool the rotor assembly 3 and then flows into the fourth cavity 51. The coolant in the fourth cavity 51 flows out from the liquid outlet 52. Thereby, when the motor 100 operates, it realizes the cooling and temperature reduction of the stator 2 and the rotor assembly 3, effectively preventing problems such as the aging or short circuit of the insulating layer caused by the overheating of the stator 2, and effectively preventing problems such as the failure of the magnetic steel 32 of the rotor assembly 3 due to high temperature. While realizing the cooling and temperature reduction of the stator 2 and the rotor assembly 3, it ensures the efficiency of the motor 100, and further improves the reliability and service life of the motor 100, ensuring the stability and performance of the motor 100 under long-term high-load operation.

[0050] At the same time, since the coolant flows through the cooling flow path formed by the first cavity 13, the third cavity 41, the second cavity 14 and the fourth cavity 51, so that the coolant continuously flows between the stator 2 and the rotor assembly 3, ensuring the rapid transfer and dissipation of heat, improving the heat dissipation efficiency, and the flow path of the coolant is reasonable, making the temperature distribution of the stator 2 and the rotor assembly 3 more uniform, avoiding the occurrence of local overheating phenomenon, and further improving the heat dissipation efficiency of the motor 100.

[0051] In addition, by arranging the first cavity 13 and the second cavity 14 at intervals and sleeving the first cavity 13 outside the second cavity 14, the first cavity 13 and the second cavity 14 are two independent cooling regions, and the coolant circulates in their respective cavities without mixing or interfering with each other. Thus, the coolant flow rate and pressure in the first cavity 13 and the second cavity 14 can be independently controlled according to different performance motors 100, so as to more precisely meet the respective cooling requirements of the stator 2 and the rotor assembly 3, and further improve the heat dissipation effect and versatility of the motor 100.

[0052] In addition, the above structure enables the rotor assembly 3 to dissipate heat effectively, so that the motor 100 can use a magnet 32 with a lower temperature resistance grade under the same working conditions, thereby reducing the material cost of the magnet 32; or on the premise that the temperature resistance grade of the magnet 32 remains unchanged, it is applied to a motor 100 with higher performance, thereby improving the performance of the motor 100, achieving a dual optimization of the performance and cost of the motor 100.

[0053] Optionally, the coolant is cooling oil. It can be understood that since the cooling oil has a high heat capacity and thermal conductivity, by using the cooling oil as the coolant, the cooling effect on the stator 2 and the rotor assembly 3 is further improved. Moreover, compared with the water cooling system, the oil cooling system has fewer risks of rust, blockage and leakage, improving the reliability and service life of the motor 100.

[0054] Furthermore, the motor further includes a first connector 81 and a second connector 82. One end of the first connector 81 passes through the liquid inlet 111 and the other end is connected to an external infusion pipe, so that the coolant in the infusion pipe enters the first cavity 13 through the first connector 81 and the liquid inlet 111. One end of the second connector 82 passes through the liquid outlet 52 and the other end is connected to an external infusion pipe, so that the coolant flowing out of the liquid outlet 52 flows into the infusion pipe through the second connector 82, realizing the recovery and circulation of the coolant. Optionally, the first connector 81 is in threaded cooperation with the infusion pipe, and the second connector 82 is in threaded cooperation with the infusion pipe.

[0055] According to the motor 100 of the embodiment of the present invention, the housing 1 has a liquid inlet 111, and a first cavity 13 and a second cavity 14 arranged at intervals. The first cavity 13 is sleeved outside the second cavity 14. The liquid inlet 111 is communicated with the first cavity 13. Along the axial direction of the motor 100, both ends of the first cavity 13 are open, and both ends of the second cavity 14 are open. The stator 2 is located in the first cavity 13, and the rotor assembly 3 is located in the second cavity 14. Along the axial direction of the motor 100, the first end cover 4 and the second end cover 5 are respectively located at both ends of the housing 1 and connected to the housing 1. The first end cover 4 and the second end cover 5 are used to seal the first cavity 13 and the second cavity 14. The first end cover 4 has a third cavity 41, and the second end cover 5 has a fourth cavity 51 and a liquid outlet 52. The third cavity 41 is respectively communicated with the first cavity 13 and the second cavity 14, and the fourth cavity 51 is respectively communicated with the second cavity 14 and the liquid outlet 52.

[0056] Therefore, when the motor 100 operates, while cooling and reducing the temperature of the stator 2 and the rotor assembly 3, the efficiency of the motor 100 is ensured, the reliability and service life of the motor 100 are improved, and the stability and performance of the motor 100 under long-term high-load operation are ensured. At the same time, since the coolant flows through the cooling flow path formed by the first cavity 13, the third cavity 41, the second cavity 14, and the fourth cavity 51, the continuous flow of the coolant between the stator 2 and the rotor assembly 3 is ensured, and the rapid transfer and dissipation of heat are ensured, improving the heat dissipation efficiency. In addition, the first cavity 13 and the second cavity 14 are two independent cooling regions, and the coolant circulates in their respective cavities without mixing or interfering with each other. Therefore, the coolant flow rate and pressure in the first cavity 13 and the second cavity 14 can be independently controlled according to different performance motors 100, so as to more precisely meet the respective cooling requirements of the stator 2 and the rotor assembly 3, and further improve the heat dissipation effect and versatility of the motor 100.

[0057] In some embodiments of the present invention, such as Figure 2 , Figure 7 and Figure 8 shown, the housing 1 includes a housing body 11 and a liquid separation sleeve 12. Among them, both ends of the housing body 11 in the length direction are respectively connected to the first end cover 4 and the second end cover 5. The housing body 11 has a liquid inlet 111. The liquid separation sleeve 12 is spaced apart from the housing body 11. The inner wall of the housing body 11 and the outer wall of the liquid separation sleeve 12 define the first cavity 13, and the inner wall of the liquid separation sleeve 12 defines the second cavity 14.

[0058] It can be understood that through such a setting, the first cavity 13 defined by the inner wall of the housing body 11 and the outer wall of the liquid separation sleeve 12 and the second cavity 14 defined by the inner wall of the liquid separation sleeve 12 are spaced apart, ensuring that the first cavity 13 and the second cavity 14 are two independent cooling regions. Therefore, the coolant flow rate and pressure in the first cavity 13 and the second cavity 14 can be independently controlled according to different performance motors 100, so as to more precisely meet the respective cooling requirements of the stator 2 and the rotor assembly 3, and further improve the heat dissipation effect and versatility of the motor 100. At the same time, the housing body 11 effectively protects components such as the liquid separation sleeve 12, the stator 2, and the rotor assembly 3 located inside the housing body 11, and is respectively connected to the first end cover 4 and the second end cover 5 at both ends of the housing body 11 in the length direction, effectively avoiding the intrusion of impurities outside the motor 100 and improving the overall reliability and service life.

[0059] In some embodiments of the present invention, such as Figure 5As shown, one side of the first end cover 4 facing the second end cover 5 has a first sealing groove 42, and one end of the liquid separation sleeve 12 close to the first end cover 4 extends into the first sealing groove 42. Thus, through such a setting, the sealed connection between the liquid separation sleeve 12 and the first end cover 4 is realized, further ensuring that the first cavity 13 defined by the inner wall of the housing body 11 and the outer wall of the liquid separation sleeve 12 and the second cavity 14 defined by the inner wall of the liquid separation sleeve 12 are spaced apart.

[0060] Furthermore, there is a first sealing ring between the liquid separation sleeve 12 and the first sealing groove 42, further improving the sealing effect between the liquid separation sleeve 12 and the first sealing groove 42.

[0061] In some embodiments of the present invention, as Figure 7 and Figure 11 shown, one side of the second end cover 5 facing the first end cover 4 has a second sealing groove 53, and one end of the liquid separation sleeve 12 close to the second end cover 5 extends into the second sealing groove 53. Thus, through such a setting, the sealed connection between the liquid separation sleeve 12 and the second end cover 5 is realized, further ensuring that the first cavity 13 defined by the inner wall of the housing body 11 and the outer wall of the liquid separation sleeve 12 and the second cavity 14 defined by the inner wall of the liquid separation sleeve 12 are spaced apart.

[0062] Furthermore, there is a second sealing ring between the liquid separation sleeve 12 and the second sealing groove 53, further improving the sealing effect between the liquid separation sleeve 12 and the second sealing groove 53.

[0063] In some embodiments of the present invention, as Figures 2 - 7 shown, the rotor assembly 3 includes a rotating shaft 31 and a permanent magnet 32. Among them, there are multiple permanent magnets 32, the permanent magnets 32 extend along the axial direction of the motor 100, and the multiple permanent magnets 32 are arranged along the circumferential direction of the motor 100 and are surface-mounted on the outer peripheral surface of the rotating shaft 31. Thus, during the rotation of the rotor assembly 3, by arranging the multiple permanent magnets 32 along the circumferential direction of the motor 100, the uniform distribution of the magnetic field is ensured, thereby reducing the vibration and noise of the motor 100 and providing stable power output at the same time. At the same time, by the permanent magnets 32 extending along the axial direction of the motor 100, the magnetic energy of the permanent magnets 32 is maximally utilized, the magnetic flux of the motor 100 is increased, and the operating efficiency of the motor 100 is further improved.

[0064] The rotating shaft 31 has a first flow channel 314, a second flow channel 315, and a third flow channel 316. The first flow channel 314 and the third flow channel 316 are respectively located at both ends of the second flow channel 315 along the axial direction of the rotating shaft 31. The second flow channel 315 is formed on the outer peripheral surface of the rotating shaft 31. One end of the first flow channel 314 communicates with the third cavity 41, and the other end communicates with the second flow channel 315. One end of the third flow channel 316 communicates with the fourth cavity 51, and the other end communicates with the second flow channel 315. Thus, the coolant in the third cavity 41 flows into the fourth cavity 51 successively through the first flow channel 314, the second flow channel 315, and the third flow channel 316. Since the second flow channel 315 is formed on the outer peripheral surface of the rotating shaft 31, a plurality of magnetic steel 32 are arranged along the circumferential direction of the motor 100 and are surface-mounted on the outer peripheral surface of the rotating shaft 31, so that the coolant in the second flow channel 315 can cool the rotating shaft 31 and the magnetic steel 32, improving the heat dissipation efficiency of the rotor assembly 3.

[0065] Optionally, the motor 100 of the present application can be a Halbach array structure motor 100. It can be understood that due to the characteristics of the magnetic steel 32 of the Halbach array structure, there is no need to use additional magnetic conductive materials to enhance the magnetic field. Thus, the first flow channel 314, the second flow channel 315, and the third flow channel 316 can be provided on the rotor assembly 3 on the basis of lightweight design.

[0066] It should be noted that the rotor assembly 3 of the present application is not limited to this. The rotor assembly 3 further includes a crankshaft and a plurality of rotor punching sheets. The plurality of rotor punching sheets are stacked to form a rotor. The crankshaft is disposed in the crankshaft hole of the rotor. The magnetic steel 32 is located in the magnetic steel hole of the rotor. The rotor forms a cooling flow channel, and the cooling flow channel communicates with the third cavity 41 and the fourth cavity 51 respectively, so as to realize the cooling of the rotor assembly 3.

[0067] In some embodiments of the present invention, as Figure 5 and Figure 7 shown, the rotor assembly 3 further includes a rotating shaft sleeve 33. The rotating shaft sleeve 33 is located between the rotating shaft 31 and the plurality of magnetic steel 32. Thus, the rotating shaft 31 and the magnetic steel 32 are effectively separated by the rotating shaft sleeve 33. The heat of the magnetic steel 32 is transferred to the coolant in the second flow channel 315 through the rotating shaft sleeve 33, so as to realize the heat dissipation of the magnetic steel 32. At the same time, the rotating shaft sleeve 33 prevents the coolant in the second flow channel 315 flowing through the outer peripheral surface of the rotating shaft 31 from leaking, thus avoiding the coolant from adhering to the magnetic steel 32 during the gravity fall process or the coolant accumulating in the second cavity 14 to affect the dynamic balance and power, and further ensuring the efficiency of the motor 100.

[0068] In some embodiments of the present invention, as Figure 5 and Figure 7As shown, the rotor assembly 3 further includes a magnet sleeve 34. The magnet sleeve 34 is located in the second cavity 14 and sleeved outside a plurality of magnets 32. Thus, by sleeving the magnet sleeve 34 outside the plurality of magnets 32, a protective layer for the plurality of magnets 32 is formed. When the rotor assembly 3 rotates, the magnets 32 are effectively prevented from separating or shifting due to centrifugal force or mechanical vibration, ensuring the relative positions of each magnet 32 are stable, thereby maintaining the uniformity and stability of the magnetic field of the motor 100 and improving reliability.

[0069] Furthermore, the rotor assembly 3 further includes a magnetic isolation plate 35. The magnetic isolation plate 35 is located on the side of the rotating shaft 31 close to the end cover and is threadedly connected to the first journal 312 of the rotating shaft 31. A sealant is applied at the joint of the first journal 312, the magnetic isolation plate 35, and the magnet sleeve 34 to ensure the sealing effect, further ensuring that the coolant flows along the set flow path and avoiding liquid leakage.

[0070] In some embodiments of the present invention, as Figure 6 shown, there is one second flow channel 315 and it spirally extends along the axial direction of the rotating shaft 31. Thus, through such a setting, a longer length of the second flow channel 315 can be provided within the effective space, thereby increasing the contact area and time between the coolant and the rotating shaft 31, enabling the cooling fluid to more fully absorb and carry away the heat generated by the rotating shaft 31 and the magnets 32, and further enhancing the cooling effect.

[0071] In some embodiments of the present invention, the second flow channel 315 includes a plurality of sub-channels. The plurality of sub-channels are spaced apart along the circumferential direction of the rotating shaft 31, and the sub-channels extend along the axial direction of the rotating shaft 31. Both ends of each sub-channel in the length direction are respectively communicated with the first flow channel 314 and the third flow channel 316. Thus, by flowing the coolant through the plurality of sub-channels, the cooling and temperature reduction of the rotating shaft 31 and the magnets 32 are realized. At the same time, the contact area between the coolant and the rotating shaft 31 and the magnets 32 is effectively increased through the plurality of sub-channels, improving the heat exchange efficiency and further enhancing the cooling effect.

[0072] In some embodiments of the present invention, as Figures 2 - 6As shown, the rotating shaft 31 includes a shaft body 311, a first journal 312, and a second journal 313. Along the axial direction of the motor 100, the shaft body 311 is located between the first journal 312 and the second journal 313 and is respectively connected to the first journal 312 and the second journal 313. A second flow channel 315 is formed on the outer peripheral surface of the shaft body 311. A plurality of permanent magnets 32 are surface-mounted on the outer peripheral surface of the shaft body 311. The first flow channel 314 includes a first sub-flow channel 3141 and a plurality of second sub-flow channels 3142. A part of the first sub-flow channel 3141 is formed on the shaft body 311 and a part of the first sub-flow channel 3141 is formed on the first journal 312. One end of the first sub-flow channel 3141 communicates with the second flow channel 315, and the other end communicates with the plurality of second sub-flow channels 3142. One end of each second sub-flow channel 3142 away from the first sub-flow channel 3141 extends to the outer peripheral surface of the first journal 312 to form a first through hole 3143. The plurality of first through holes 3143 are arranged at intervals along the circumferential direction of the rotating shaft 31 and are all communicated with the third cavity 41.

[0073] Thus, the coolant in the third cavity 41 flows into the corresponding second sub-flow channel 3142 through the plurality of first through holes 3143. The coolant in each second sub-flow channel 3142 flows into the second flow channel 315. The coolant in the second flow channel 315 flows into the third flow channel 316 and passes through the part of the first sub-flow channel 3141 formed on the shaft body 311, the part of the first sub-flow channel 3141 formed on the first journal 312, and the second flow channel 315 formed on the outer peripheral surface of the shaft body 311, so as to realize the cooling of the shaft body 311, the first journal 312, and the plurality of permanent magnets 32.

[0074] In some embodiments of the present invention, as Figures 2 - 6 shown, the rotating shaft 31 includes a shaft body 311, a first journal 312, and a second journal 313. Along the axial direction of the motor 100, the shaft body 311 is located between the first journal 312 and the second journal 313 and is respectively connected to the first journal 312 and the second journal 313. A second flow channel 315 is formed on the outer peripheral surface of the shaft body 311. A plurality of permanent magnets 32 are surface-mounted on the outer peripheral surface of the shaft body 311. The third flow channel 316 includes a third sub-flow channel 3161 and a plurality of fourth sub-flow channels 3162. A part of the third sub-flow channel 3161 is formed on the shaft body 311 and a part of the third sub-flow channel 3161 is formed on the second journal 313. One end of the third sub-flow channel 3161 communicates with the second flow channel 315, and the other end communicates with the plurality of fourth sub-flow channels 3162. One end of each fourth sub-flow channel 3162 away from the third sub-flow channel 3161 extends to the outer peripheral surface of the second journal 313 to form a second through hole 3163. The plurality of second through holes 3163 are arranged at intervals along the circumferential direction of the rotating shaft 31 and are all communicated with the fourth cavity 51.

[0075] Accordingly, the coolant in the third cavity 41 flows through the first flow channel 314 into the second flow channel 315. The coolant in the second flow channel 315 flows through the third sub-flow channel 3161 into a plurality of fourth sub-flow channels 3162. The coolant in each fourth sub-flow channel 3162 flows through the corresponding second through-hole 3163 into the fourth cavity 51, and a part of the third sub-flow channel 3161 is formed on the shaft body 311, a part of the third sub-flow channel 3161 is formed on the second journal 313, a part of the first sub-flow channel 3141 is formed on the first journal 312, and the second flow channel 315 is formed on the outer peripheral surface of the shaft body 311, thereby realizing the cooling of the shaft body 311, the second journal 313, and the plurality of magnetic steel 32.

[0076] In some embodiments of the present invention, as Figures 2 - 6 shown, the rotating shaft 31 includes a shaft body 311, a first journal 312, and a second journal 313. Along the axial direction of the motor 100, the shaft body 311 is located between the first journal 312 and the second journal 313 and is respectively connected to the first journal 312 and the second journal 313. The second flow channel 315 is formed on the outer peripheral surface of the shaft body 311. A plurality of magnetic steel 32 are surface-mounted on the outer peripheral surface of the shaft body 311. The first flow channel 314 includes a first sub-flow channel 3141 and a plurality of second sub-flow channels 3142. A part of the first sub-flow channel 3141 is formed on the shaft body 311 and a part of the first sub-flow channel 3141 is formed on the first journal 312. One end of the first sub-flow channel 3141 is communicated with the second flow channel 315, and the other end is communicated with a plurality of second sub-flow channels 3142. One end of each second sub-flow channel 3142 away from the first sub-flow channel 3141 extends to the outer peripheral surface of the first journal 312 to form a first through-hole 3143. The plurality of first through-holes 3143 are arranged at intervals along the circumferential direction of the rotating shaft 31 and are all communicated with the third cavity 41. The third flow channel 316 includes a third sub-flow channel 3161 and a plurality of fourth sub-flow channels 3162. A part of the third sub-flow channel 3161 is formed on the shaft body 311 and a part of the third sub-flow channel 3161 is formed on the second journal 313. One end of the third sub-flow channel 3161 is communicated with the second flow channel 315, and the other end is communicated with a plurality of fourth sub-flow channels 3162. One end of each fourth sub-flow channel 3162 away from the third sub-flow channel 3161 extends to the outer peripheral surface of the second journal 313 to form a second through-hole 3163. The plurality of second through-holes 3163 are arranged at intervals along the circumferential direction of the rotating shaft 31 and are all communicated with the fourth cavity 51.

[0077] Thus, the coolant in the third cavity 41 flows into the corresponding second sub-channel 3142 through a plurality of first through-holes 3143. The coolant in each second sub-channel 3142 flows into the second channel 315. The coolant in the second channel 315 flows into a plurality of fourth sub-channels 3162 through the third sub-channel 3161. The coolant in each fourth sub-channel 3162 flows into the fourth cavity 51 through the corresponding second through-hole 3163. And a part of the third sub-channel 3161 is formed on the shaft body 311, a part of the third sub-channel 3161 is formed on the second journal 313, a part of the first sub-channel 3141 is formed on the first journal 312, and the second channel 315 is formed on the outer peripheral surface of the shaft body 311, so as to realize the cooling of the shaft body 311, the first journal 312, the second journal 313 and the plurality of magnets 32.

[0078] In some embodiments of the present invention, as Figure 2 and Figure 7 shown, the rotor assembly 3 further includes a first bearing 91 and a second bearing 92. Wherein, the first bearing 91 is sleeved outside the first journal 312 and located in the third cavity 41, and the second bearing 92 is sleeved outside the second journal 313 and located in the fourth cavity 51. Thus, by sleeving the first bearing 91 outside the first journal 312 and the second bearing 92 outside the second journal 313, the supporting effect on the rotating shaft 31 is realized, and the stability and reliability of the rotation of the rotating shaft 31 are ensured.

[0079] Meanwhile, when the coolant is cooling oil, since the first bearing 91 is located in the third cavity 41, the cooling oil in the third cavity 41 provides lubrication and heat dissipation for the first bearing 91, avoiding the failure of the first bearing 91 due to the drying up of the lubricating grease of the first bearing 91 after the long-term operation of the motor 100, and improving the service life of the first bearing 91. Since the second bearing 92 is located in the fourth cavity 51, the cooling oil in the fourth cavity 51 provides lubrication and heat dissipation for the second bearing 92, avoiding the failure of the second bearing 92 due to the drying up of the lubricating grease of the second bearing 92 after the long-term operation of the motor 100, and improving the service life of the second bearing 92.

[0080] In some embodiments of the present invention, as Figure 2 and Figure 7 shown, the motor 100 further includes a first oil seal assembly 6 and a second oil seal assembly 7. Wherein, the first oil seal assembly 6 includes two first oil seal members 61. The two first oil seal members 61 are respectively located at both ends of the third cavity 41 along the axial direction of the motor 100 and are used for sealing the third cavity 41. The first journal 312 passes through the two first oil seal members 61. The second oil seal assembly 7 includes two second oil seal members 71. The two second oil seal members 71 are respectively located at both ends of the fourth cavity 51 along the axial direction of the motor 100 and are used for sealing the fourth cavity 51. The second journal 313 passes through the two second oil seal members 71.

[0081] Thus, the third cavity 41 is sealed by two first oil seal members 61, and the fourth cavity 51 is sealed by two second oil seal members 71, thereby effectively preventing coolant leakage, improving the reliability of the cooling flow path, enabling the coolant to flow along the path of the specified cooling flow path, and enhancing the cooling effect on the stator 2 and the rotor assembly 3.

[0082] In some embodiments, as Figure 7 shown, the first oil seal assembly 6 includes a first oil seal bracket 62. The first oil seal bracket 62 is located on the side of the first end cover 4 facing the second end cover 5 and is connected to the first end cover 4. The first oil seal member 61 near the first oil seal bracket 62 is connected to the first oil seal bracket 62. Thus, the first oil seal bracket 62 provides an installation position for the first oil seal member 61, ensuring the sealing effect of the first oil seal member 61 on the third cavity 41. Further, there is a third sealing ring between the first oil seal bracket 62 and the first end cover 4, further ensuring the sealing connection effect between the two.

[0083] In some embodiments, as Figure 7 shown, the second oil seal assembly 7 includes a second oil seal bracket 72. The second oil seal bracket 72 is located on the side of the second end cover 5 facing the first end cover 4 and is connected to the second end cover 5. The second oil seal member 71 near the second oil seal bracket 72 is connected to the second oil seal bracket 72. Thus, the second oil seal bracket 72 provides an installation position for the second oil seal member 71, ensuring the sealing effect of the second oil seal member 71 on the fourth cavity 51. Further, there is a fourth sealing ring between the second oil seal bracket 72 and the second end cover 5, further ensuring the sealing connection effect between the two.

[0084] In some embodiments of the present invention, as Figures 8 - 10 shown, the first end cover 4 further has a filter cavity 43. The filter cavity 43 is respectively communicated with the first cavity 13 and the third cavity 41. A filter assembly 44 is provided in the filter cavity 43 for filtering the coolant flowing from the first cavity 13 into the filter cavity 43. Thus, the filter assembly 44 filters the coolant flowing from the first cavity 13 into the filter cavity 43 to ensure the purity and cleanliness of the coolant flowing into the third cavity 41, the second cavity 14, and the fourth cavity 51, reduce the influence of impurities on the motor 100, and improve the reliability and service life of the motor 100. At the same time, when the coolant of the motor 100 is recycled, the coolant filtered by the filter assembly 44 will enter the first cavity 13 again from the liquid inlet 111, further reducing the influence of impurities on the motor 100.

[0085] In addition, in some embodiments, a first bearing 91 is sleeved on the first journal 312 of the rotating shaft 31. The first bearing 91 is located in the third cavity 41. A second bearing 92 is sleeved on the second journal 313 of the rotating shaft 31. The second bearing 92 is located in the fourth cavity 51. The coolant flowing from the first cavity 13 into the filter cavity 43 is filtered by the filter assembly 44, thereby effectively filtering the influence of the impurities in the coolant on the first bearing 91 and the second bearing 92, and improving the service life and reliability of the first bearing 91 and the second bearing 92.

[0086] Optionally, the filter assembly 44 is a filter cotton. Thus, due to the large number of tiny pores inside the filter cotton, it can effectively intercept the particulate matters, impurities, etc. in the coolant. The filter cotton has a high filtration efficiency and can block dust particles of different particle sizes, ensuring the purity of the coolant, thereby protecting the internal components of the motor 100 from damage by impurities.

[0087] In some embodiments of the present invention, as Figures 8 - 10 shown, the inner wall surface of the filter cavity 43 has a first communication hole 431, a second communication hole 432 and an opening 433. The first communication hole 431 is used to connect the filter cavity 43 and the first cavity 13. The second communication hole 432 is used to connect the filter cavity 43 and the third cavity 41. The opening 433 is opened on the side of the first end cover 4 away from the second end cover 5. The first end cover 4 further includes a cover plate 45, and the cover plate 45 is used to block the opening 433.

[0088] Thus, the coolant in the first cavity 13 enters the filter cavity 43 through the first communication hole 431, and after being filtered by the filter assembly 44 in the filter cavity 43, it flows into the third cavity 41 through the second communication hole 432, realizing the filtration of the coolant flowing from the first cavity 13 into the filter cavity 43 by the filter assembly 44. At the same time, since the opening 433 is opened on the side of the first end cover 4 away from the second end cover 5, and the cover plate 45 is used to block the opening 433, it is convenient to replace, install and repair the filter assembly 44, improving the efficiency.

[0089] In some embodiments of the present invention, as Figure 2 shown, the liquid inlet 111 is located on the side close to the second end cover 5 along the axial direction of the motor 100. It can be understood that since the first end cover 4 and the second end cover 5 are respectively located at both ends of the housing 1 along the axial direction of the motor 100, and the liquid outlet 52 is located on the second end cover 5, by the liquid inlet 111 being located on the side close to the second end cover 5 along the axial direction of the motor 100, the coolant entering the first cavity 13 through the liquid inlet 111 flows along the axial direction of the motor 100 to the third cavity 41 of the first end cover 4, improving the cooling effect of the coolant on the stator 2 in the first cavity 13.

[0090] The aircraft of the embodiments of the present invention will be described below.

[0091] An aircraft according to an embodiment of the present invention includes a motor 100. Specifically, the aircraft includes a fuselage and the motor 100. The motor 100 is disposed on the fuselage 3 and is used to provide power for the aircraft to enable the aircraft to fly. It should be noted that the aircraft can be an aircraft with variable pitch propellers such as a helicopter or a multi-rotor aircraft.

[0092] The housing 1 of the motor 100 has a liquid inlet 111, and a first cavity 13 and a second cavity 14 which are spaced apart. The first cavity 13 is sleeved outside the second cavity 14. The liquid inlet 111 is communicated with the first cavity 13. Along the axial direction of the motor 100, both ends of the first cavity 13 are open, and both ends of the second cavity 14 are open. The stator 2 is located in the first cavity 13, and the rotor assembly 3 is located in the second cavity 14. Along the axial direction of the motor 100, a first end cover 4 and a second end cover 5 are respectively located at both ends of the housing 1 and are connected to the housing 1. The first end cover 4 and the second end cover 5 are used to seal the first cavity 13 and the second cavity 14. The first end cover 4 has a third cavity 41, and the second end cover 5 has a fourth cavity 51 and a liquid outlet 52. The third cavity 41 is respectively communicated with the first cavity 13 and the second cavity 14, and the fourth cavity 51 is respectively communicated with the second cavity 14 and the liquid outlet 52.

[0093] Thus, when the motor 100 provides power for the aircraft, since the coolant flows through the cooling flow path formed by the first cavity 13, the third cavity 41, the second cavity 14, and the fourth cavity 51, the continuous flow of the coolant between the stator 2 and the rotor assembly 3 is ensured, the rapid transfer and dissipation of heat are ensured, the heat dissipation efficiency is improved, and thus while cooling and reducing the temperature of the stator 2 and the rotor assembly 3, the efficiency of the motor 100 is ensured, the reliability and service life of the motor 100 are improved, the stability and performance of the motor 100 under long-term high-load operation are ensured, and further the stable output of power is maintained, and the reliability and safety of the aircraft are improved.

[0094] An aircraft according to an embodiment of the present invention is provided with a motor 100. When the motor 100 provides power for the aircraft, since the coolant flows through the cooling flow path formed by the first cavity 13, the third cavity 41, the second cavity 14, and the fourth cavity 51, the continuous flow of the coolant between the stator 2 and the rotor assembly 3 is ensured, the rapid transfer and dissipation of heat are ensured, the heat dissipation efficiency is improved, and thus while cooling and reducing the temperature of the stator 2 and the rotor assembly 3, the efficiency of the motor 100 is ensured, the reliability and service life of the motor 100 are improved, the stability and performance of the motor 100 under long-term high-load operation are ensured, and further the stable output of power is maintained, and the reliability and safety of the aircraft are improved.

[0095] Other components and operations of the motor 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0096] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0097] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that, Comprising: A housing having a liquid inlet, a first cavity and a second cavity spaced apart, the first cavity sleeved outside the second cavity, the liquid inlet communicating with the first cavity, with both ends of the first cavity open along the axial direction of the motor, and both ends of the second cavity open; A stator located within the first cavity; A rotor assembly located within the second cavity; A first end cover and a second end cover, along the axial direction of the motor, the first end cover and the second end cover are respectively located at both ends of the housing and connected to the housing, the first end cover and the second end cover are used to seal the first cavity and the second cavity, the first end cover has a third cavity, the second end cover has a fourth cavity and a liquid outlet, the third cavity communicates with the first cavity and the second cavity respectively, and the fourth cavity communicates with the second cavity and the liquid outlet respectively.

2. The motor according to claim 1, characterized in that The housing includes: A housing body, with both ends in the length direction of the housing body connected to the first end cover and the second end cover respectively, the housing body having the liquid inlet; A liquid isolation sleeve spaced apart from the housing body, the inner wall of the housing body and the outer wall of the liquid isolation sleeve defining the first cavity, and the inner wall of the liquid isolation sleeve defining the second cavity.

3. The motor according to claim 2, characterized in that, The side of the first end cover facing the second end cover has a first sealing groove, and one end of the liquid isolation sleeve close to the first end cover extends into the first sealing groove; And / or, the side of the second end cover facing the first end cover has a second sealing groove, and one end of the liquid isolation sleeve close to the second end cover extends into the second sealing groove.

4. The motor according to claim 1, characterized in that, The rotor assembly includes: A rotating shaft having a first flow channel, a second flow channel and a third flow channel, the first flow channel and the third flow channel are respectively located at both ends of the second flow channel along the axial direction of the rotating shaft, the second flow channel is formed on the outer peripheral surface of the rotating shaft, one end of the first flow channel communicates with the third cavity, the other end communicates with the second flow channel, one end of the third flow channel communicates with the fourth cavity, and the other end communicates with the second flow channel; Magnets, there are multiple magnets, the magnets extend along the axial direction of the motor, and the multiple magnets are arranged along the circumferential direction of the motor and are surface-mounted on the outer peripheral surface of the rotating shaft.

5. The motor according to claim 4, characterized in that, The second flow channel is one and spirally extends along the axial direction of the rotating shaft; Or, the second flow channel includes multiple sub-channels, the multiple sub-channels are spaced apart along the circumferential direction of the rotating shaft, the sub-channels extend along the axial direction of the rotating shaft, and both ends in the length direction of each sub-channel communicate with the first flow channel and the third flow channel respectively.

6. The motor according to claim 4, characterized in that, The rotating shaft includes a shaft body, a first journal and a second journal, along the axial direction of the motor, the shaft body is located between the first journal and the second journal and is respectively connected to the first journal and the second journal, the second flow channel is formed on the outer peripheral surface of the shaft body, and the multiple magnets are surface-mounted on the outer peripheral surface of the shaft body. The first flow channel includes a first sub-flow channel and a plurality of second sub-flow channels. A part of the first sub-flow channel is formed on the shaft body and a part of the first sub-flow channel is formed on the first journal. One end of the first sub-flow channel communicates with the second flow channel, and the other end communicates with the plurality of second sub-flow channels. One end of each second sub-flow channel away from the first sub-flow channel extends to the outer peripheral surface of the first journal to form a first through hole. The plurality of first through holes are arranged at intervals along the circumferential direction of the rotating shaft and are all communicated with the third cavity; And / or, the third flow channel includes a third sub-flow channel and a plurality of fourth sub-flow channels. A part of the third sub-flow channel is formed on the shaft body and a part of the third sub-flow channel is formed on the second journal. One end of the third sub-flow channel communicates with the second flow channel, and the other end communicates with the plurality of fourth sub-flow channels. One end of each fourth sub-flow channel away from the third sub-flow channel extends to the outer peripheral surface of the second journal to form a second through hole. The plurality of second through holes are arranged at intervals along the circumferential direction of the rotating shaft and are all communicated with the fourth cavity.

7. The motor according to claim 6, characterized in that, The rotor assembly further includes: A first bearing, which is sleeved outside the first journal and located in the third cavity; A second bearing, which is sleeved outside the second journal and located in the fourth cavity.

8. The motor according to claim 6, characterized in that, It further includes: A first oil seal assembly, which includes two first oil seal members. The two first oil seal members are respectively located at both ends of the third cavity along the axial direction of the motor and are used to seal the third cavity. The first journal penetrates through the two first oil seal members; A second oil seal assembly, which includes two second oil seal members. The two second oil seal members are respectively located at both ends of the fourth cavity along the axial direction of the motor and are used to seal the fourth cavity. The second journal penetrates through the two second oil seal members.

9. The motor according to claim 4, characterized in that, The rotor assembly further includes a shaft sleeve, and the shaft sleeve is located between the rotating shaft and the plurality of magnetic steels; And / or, the rotor assembly further includes a magnetic steel sleeve, and the magnetic steel sleeve is located in the second cavity and sleeved outside the plurality of magnetic steels.

10. The motor according to claim 1, characterized in that, The first end cover further has a filtering cavity, and the filtering cavity is respectively communicated with the first cavity and the third cavity. A filtering component is provided in the filtering cavity for filtering the coolant flowing from the first cavity into the filtering cavity.

11. The motor according to claim 10, characterized in that, The inner wall surface of the filtering cavity has a first communication hole, a second communication hole and an opening. The first communication hole is used to communicate the filtering cavity and the first cavity, the second communication hole is used to communicate the filtering cavity and the third cavity, the opening is opened on the side of the first end cover away from the second end cover, and the first end cover further includes a cover plate for blocking the opening.

12. The motor according to claim 1, characterized in that, The liquid inlet is located on the side close to the second end cover along the axial direction of the motor.

13. An aircraft, characterized in that, It includes a motor according to any one of claims 1-12.

Images