High-rotating-speed output motor

Abstract

The invention relates to a high-rotating-speed output motor, which belongs to the technical field of motors and comprises a sealing shell, an air exhaust joint is arranged on the sealing shell, a magnetofluid bearing is arranged at the extending end of a rotating shaft of the sealing shell, and a driving assembly for driving the rotating shaft to rotate is arranged in the sealing shell. According to the invention, the effect of reducing the windmill loss during the operation of the motor is realized.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a high-speed output motor. Background Technology

[0002] During motor operation, there is usually a certain air gap between the stator and rotor, and between the shaft and the housing. When the motor runs at high speed, the rotating parts drive the air inside the housing to flow at high speed, creating significant gas friction resistance. This resistance causes energy to be consumed as heat, resulting in windage loss (also known as wind resistance loss or ventilation loss).

[0003] In traditional motor structures, the stator winding ends, rotor surface, shaft extension, and ventilation channels are all areas where high-speed relative motion with air can occur, and these areas are the main sources of wind wear loss. Especially in high-speed motors, the rotor's circumferential velocity is high, and the forced airflow creates turbulence in the stator-rotor gap and winding end areas, significantly increasing wind wear loss.

[0004] This will cause the temperature of the windings and permanent magnets to rise due to air friction heat, affecting the stability of insulation and magnetic properties. In addition, wind resistance will reduce the mechanical output efficiency of the motor, and turbulence will cause additional aerodynamic noise and vibration. Summary of the Invention

[0005] In order to reduce wind-induced wear during motor operation, this application provides a high-speed output motor.

[0006] The high-speed output motor provided in this application adopts the following technical solution: A high-speed output motor includes a sealed housing, an air extraction connector on the sealed housing, a magnetohydrodynamic bearing on the extended end of the shaft of the sealed housing, and a drive assembly for driving the shaft to rotate inside the sealed housing.

[0007] By adopting the above technical solution, the drive component is installed inside the sealed housing, and the inside of the sealed housing is evacuated through the air extraction connector to keep the motor in a low-pressure or vacuum state, so as to significantly reduce the gas friction between the rotating parts and the air, thereby reducing wind wear. Meanwhile, the inner ring of the magnetohydrodynamic bearing is fixedly fitted to the shaft, and a magnetohydrodynamic sealing layer is formed between the inner and outer rings. This magnetohydrodynamic sealing layer has good airtightness and self-healing properties under the action of a magnetic field, and can maintain a stable sealing state when the shaft rotates at high speed, achieving non-contact dynamic sealing at the shaft. Through the above structural design, the motor can effectively reduce wind wear and the risk of air intake at the shaft end while maintaining high speed operation, thereby achieving stable high-speed output operation and improving the motor's working efficiency and long-term reliability.

[0008] Optionally, the drive assembly includes a cooler and a rotating housing. The cooler is a sleeve-shaped structure. An inner stator winding is arranged along the inner circumference of the cooler, and an outer stator winding is arranged along the outer circumference of the cooler. A first rotating shaft is rotatably arranged inside the cooler. The first rotating shaft extends from one end of the sealed housing, and an inner rotor is arranged on the first rotating shaft. The rotating outer shell is rotatably mounted on the cooler, and a second rotating shaft is connected to the end of the rotating outer shell away from the first rotating shaft, with the second rotating shaft extending out of the sealing shell; The cooler is fixed inside the sealed housing.

[0009] By adopting the above technical solution, the outer stator winding can drive the outer rotor and rotating housing to rotate after being energized, thereby driving the second shaft to output; the inner stator winding can drive the inner rotor to rotate after being energized, thereby driving the first shaft to output, thus achieving high-speed bidirectional output.

[0010] This structure eliminates the need for complex mechanical transmission mechanisms to achieve reverse output, resulting in high transmission efficiency and fast response. It is particularly suitable for applications such as low-altitude economic aircraft where lightweight design and high power density are required. The cooler not only functions as a cooling unit but also as a support structure for the inner and outer stator windings. One end of the cooler is fixed inside a sealed housing, while the other end is rotatably supported via a second shaft, thus forming a stable support system. The cooler also provides rotational support for the first shaft, eliminating the need for additional independent support components. This results in a more compact, integrated, and lighter overall structure, making it suitable for high-speed, long-term stable operation.

[0011] Optionally, it also includes an annular structure, wherein the annular structure has a plurality of first protrusions equidistantly arranged along its outer circumference, and the annular structure has a plurality of second protrusions equidistantly arranged along its inner circumference. Each first protrusion can be wound with a coil to form the outer stator winding, and each second protrusion can be wound with a coil to form the inner stator winding. The annular structure has a plurality of insertion channels opened along its circumference, and the insertion channels extend to both ends of the annular structure. The cooler includes an annular support base, and a plurality of plug-in plates are arranged along its circumference. Each plug-in plate corresponds to a plug-in channel. The annular support base is fixedly connected to the sealing shell. Each plug-in plate is inserted into the corresponding plug-in channel. The ends of the plurality of plug-in plates away from the annular support base are connected to a support end cap. Cooling channels are provided both inside the plug-in plate and the annular support base.

[0012] By adopting the above technical solution, the annular structure, the first protrusion, and the second protrusion are integrally formed. During assembly, it is only necessary to wind coils onto each of the first and second protrusions to form windings, then insert the plug-in plate on the cooler into the corresponding plug-in channel, and install the support end cap at the end of the plug-in plate to achieve rapid assembly. This structure avoids the cumbersome process of splicing multiple stator segments or multi-layer clamping and positioning, improves the assembly accuracy and consistency of the stator assembly, reduces assembly difficulty, and improves assembly efficiency. Since the stator core is the main heat source of the motor, heat can be quickly conducted to the cooling channels through the plug-in plate directly connected to it, achieving efficient heat exchange. This significantly shortens the heat transfer path, improves heat dissipation efficiency and stator temperature uniformity, and is beneficial for the stable operation of the motor under high power density and high speed.

[0013] In addition, the cooler, as a supporting unit of the overall structure, has its annular support base fixedly connected to the sealed shell, and the support end cover can simultaneously support the inner rotor or outer rotor shaft system, reducing the number of parts, making the structure more compact, lighter, and less vibrating. It is particularly suitable for applications with strict requirements for lightweight, high rigidity, and high heat dissipation efficiency, such as high-speed motors and low-altitude economic aircraft.

[0014] Optionally, the cooling channel includes an inlet channel and an outlet channel, both of which are formed within the annular support. The plug-in plate has a hollow structure, and at least one first baffle and at least one second baffle are provided inside the plug-in plate. The first baffle and the second baffle are spaced apart. The first baffle is connected to the end of the plug-in plate near the annular support seat, and a space is left between it and the end of the plug-in plate near the support end cover. The second baffle is connected to the end of the plug-in plate near the support end cover, and a space is left between it and the end of the plug-in plate near the annular support seat, thereby forming a serpentine flow channel. In two adjacent serpentine channels, the inlet end of one serpentine channel is connected to the inlet channel, and the outlet channel of the other serpentine channel is connected to the outlet channel. In the remaining two adjacent serpentine channels, the inlet end of one serpentine channel is connected to the outlet end of the other serpentine channel, and the connecting channel of the two adjacent serpentine channels is opened in the annular support.

[0015] By adopting the above technical solution, the coolant enters the annular support through the inlet channel and flows sequentially into the serpentine channels in each plug-in plate. It flows along the serpentine path to fully absorb the heat generated by the stator core, and then connects to the next plug-in plate through the internal channel of the annular support, and finally is discharged through the outlet channel, forming a continuous circulating cooling path.

[0016] This cooling structure requires no external connecting pipes or additional joints, relying entirely on internal channels to achieve fluid circulation. This reduces the number of pipe connections and potential leakage points, lowers the system failure rate, and reduces the overall weight, achieving a high degree of integration and lightweight design.

[0017] In addition, the connecting channel between adjacent serpentine flow channels is opened in the annular support base, and the end face of the annular support base directly abuts against the annular structure, so that the fluid can exchange heat with the end face of the annular structure at the same time during the flow process, which further shortens the heat transfer path, improves the overall heat dissipation efficiency and thermal stability of the stator, and is suitable for the high-efficiency cooling requirements of high-speed and high heat density motors.

[0018] Optionally, the sealing housing includes a front cover, a rear cover, and a middle housing. The front cover is sealed to one end of the middle housing, and the rear cover is sealed to the other end of the middle housing. The front cover is provided with an inlet connector and an outlet connector. An inlet channel and an outlet channel are provided inside the front cover. The annular support is connected to the front cover, and the inlet channel flows through the inlet channel. The outlet channel communicates with the outlet channel. An external wiring plug is provided on the front cover.

[0019] By adopting the above technical solution, during the assembly process, the middle shell can be sealed and connected to the front cover first, and then the front cover can be fixedly connected to the annular support. At this time, the liquid inlet channel and liquid outlet channel in the annular support can be automatically connected to the liquid inlet channel and liquid outlet channel in the front cover, respectively. The external connection function of the liquid channel can be realized without additional pipelines or connecting joints, thereby simplifying the assembly process and improving assembly efficiency.

[0020] Optionally, the annular support includes a first annular segment connected to the plug-in plate, a second annular segment connected to the first annular segment, the outer diameter of the second annular segment being smaller than the outer diameter of the first annular segment, a third annular segment connected to the second annular segment, the outer diameter of the third annular segment being smaller than the outer diameter of the second annular segment, and a fourth annular segment connected to the third annular segment, the outer diameter of the fourth annular segment being smaller than the outer diameter of the third annular segment. The support end cap includes a fifth annular segment, which is connected to the plug-in plate. The fifth annular segment is connected to a sixth annular segment, the outer diameter of which is smaller than that of the fifth annular segment. The sixth annular segment is connected to a seventh annular segment, the outer diameter of which is smaller than that of the sixth annular segment. Bearings are fitted on both the seventh annular segment and the fourth annular segment, and the bearings are fitted inside the rotating outer shell. The bearing inner ring of the seventh annular segment abuts against the end face of the sixth annular segment, and the bearing inner ring of the fourth annular segment abuts against the end face of the third annular segment.

[0021] By adopting the above technical solution, the design of the second annular segment is to further reduce the weight of the annular support. The inner ring of the bearing can abut against the end faces of the third and sixth annular segments. Due to the design of the third and sixth annular segments, there is a gap between the rotating part of the bearing and the second and fifth annular segments, thereby avoiding sliding friction between the bearing and the stepped surface of the shaft segment. This structure ensures stable operation of the bearing while further reducing frictional resistance and rotational energy consumption, and improving the stability and reliability of the motor at high speed.

[0022] Optionally, the annular support base has a lead wire channel that extends to the end face of the first annular segment facing the inner stator winding and extends to the circumference of the fourth annular segment.

[0023] By adopting the above technical solution, the lead wire channel runs through the axial direction of the annular support, allowing the winding lead wire to be directly led out from the inside of the annular support to the outside without the need for additional line joints or external wiring structures. This simplifies the electrical connection and reduces assembly complexity and the risk of potential poor contact.

[0024] Meanwhile, the through-through design of the lead wire channel effectively reduces the amount of material used in the annular support while maintaining structural integrity, thus achieving a lightweight design.

[0025] Optionally, the rotating housing includes a front cover, a rear cover, and a housing sleeve. The outer rotor is installed inside the housing sleeve. The front cover and the rear cover are each connected to a flange at one end of the housing sleeve, and the front cover and the rear cover together abut against the outer rotor. The outer ring of the bearing on the fourth annular segment supports the front cover, and the outer ring of the bearing on the seventh annular segment supports the rear cover. The rear cover is connected to a flange, and the flange is connected to the second rotating shaft.

[0026] By adopting the above technical solution, the front cover is fitted onto the bearing, and then the front cover is connected to the housing. When the rear cover is connected and tightened, the front cover and the rear cover simultaneously press against the outer rotor and the bearing, making assembly convenient.

[0027] Optionally, an encoder is connected to the fixed end of the magnetohydrodynamic bearing.

[0028] Optionally, a first flow channel is provided inside the support end cover. The first flow channel is connected to one of the serpentine flow channels. The drain end of the first flow channel is connected to a drain connector. The drain connector is coaxial with the first rotating shaft and is rotatably and sealed. The first rotating shaft is coaxially provided with a second flow channel along its length direction. The first rotating shaft is also provided with a plurality of third flow channels along its length direction. The third flow channels are arranged around the second flow channel and are connected to each other. The drain end of the third flow channel is connected to a drain pipe. The support end cap has a liquid receiving cavity, and the support end cap is rotatably connected to a turntable. The turntable seals the liquid receiving cavity. The turntable is coaxial with the first rotating shaft. The drain pipe is connected to the turntable and communicates with the liquid receiving cavity. The support end cap also has a fourth flow channel, and a fifth flow channel is formed on one of the plug-in plates. The fourth flow channel communicates with the fifth flow channel, and the fifth flow channel communicates with the liquid outlet channel.

[0029] By adopting the above technical solution, the coolant can be diverted to the first flow channel after passing through one of the serpentine flow channels, then discharged into the second flow channel through the drain connector, and then through the third flow channel. This allows the heat from the inner rotor to be transferred to the first shaft for heat dissipation. After being discharged from the third flow channel, the coolant enters the liquid receiving chamber, and finally passes through the fourth and fifth flow channels before being discharged into the outlet flow channel. Because the inner rotor is close to the motor's central axis and surrounded by the high-heat-generating inner stator windings, its own heat is difficult to dissipate. Through the above design, the heat from the inner rotor can be transferred to the first main shaft, achieving heat dissipation for the inner rotor, thereby significantly reducing the temperature of the permanent magnet and mitigating the risk of demagnetization during high-speed operation. Meanwhile, the outer rotor is close to the motor housing, and heat is easily transferred to the housing surface for heat dissipation. Therefore, water cooling of the outer rotor is unnecessary and can still meet operational requirements.

[0030] In summary, this application includes at least one of the following beneficial technical effects: 1. While maintaining high-speed operation, the motor can effectively reduce wind wear and the risk of air intake at the shaft end, thereby achieving stable high-speed output operation and improving the motor's working efficiency and long-term reliability. 2. The cooler not only serves as a cooling unit but also acts as a support structure for the inner and outer stator windings. One end of the cooler is fixed inside the sealed housing, while the other end is rotatably supported via a second rotating shaft, thus forming a stable support system. The cooler also provides rotational support for the first rotating shaft, eliminating the need for additional independent support components. This results in a more compact, integrated, and lighter overall structure, making it suitable for high-speed, long-term stable operation. 3. The annular structure, the first protrusion, and the second protrusion are integrally formed. During assembly, only a coil needs to be wound around each of the first and second protrusions to form a winding. Then, the plug-in plate on the cooler is inserted into the corresponding plug-in channel, and a support end cap is installed at the end of the plug-in plate to achieve rapid assembly. This structure avoids the cumbersome process of splicing multiple stator sections or multi-layer clamping and positioning, improves the assembly accuracy and consistency of the stator assembly, reduces assembly difficulty, and increases assembly efficiency.

[0031] 4. After entering the annular support through the inlet channel, the coolant flows sequentially into the serpentine channels within each connector plate, flowing along the serpentine path to fully absorb the heat generated by the stator core. It then connects to the next connector plate through the internal channel of the annular support and is finally discharged through the outlet channel, forming a continuous circulating cooling path.

[0032] This cooling structure requires no external connecting pipes or additional joints, relying entirely on internal channels to achieve fluid circulation. This reduces the number of pipe connections and potential leakage points, lowers the system failure rate, and reduces the overall weight, achieving a high degree of integration and lightweight design. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0034] Figure 2 This is a schematic diagram illustrating the structure of the cooler and the rotating housing in an embodiment of this application.

[0035] Figure 3 This is a schematic diagram illustrating the structure of the front cover in an embodiment of this application.

[0036] Figure 4 This is a structural schematic diagram illustrating the assembly sequence of the outer rotor, inner rotor, annular support base, plug-in plate, and support end cover in an embodiment of this application.

[0037] Figure 5 This is a schematic diagram illustrating the ring structure, the first protrusion, and the second protrusion in an embodiment of this application.

[0038] Figure 6 This is a schematic diagram illustrating the structure of the first to seventh annular segments in an embodiment of this application.

[0039] Figure 7 This is a schematic diagram illustrating the structure of the inlet and outlet flow channels in an embodiment of this application.

[0040] Figure 8 This is a schematic diagram illustrating the structure of the first baffle, the second baffle, and the serpentine flow channel in an embodiment of this application.

[0041] Figure 9 This is a schematic diagram illustrating the structure of the first flow channel, the second flow channel, the third flow channel, and the fourth flow channel in the embodiments of this application.

[0042] Figure 10 yes Figure 9 An enlarged schematic diagram of part A in the middle.

[0043] Figure 11 This is a schematic diagram illustrating the structure of the drain connector and drain pipe in the embodiments of this application.

[0044] Explanation of reference numerals in the attached drawings: 1. Sealed housing; 11. Vacuum fitting; 12. Front end cover; 121. Liquid inlet channel; 122. Liquid outlet channel; 123. Annular protrusion; 124. Positioning hole; 13. Rear end cover; 14. Middle housing; 15. External wiring connector; 16. Liquid inlet connector; 17. Liquid outlet connector; 2. Magnetohydrodynamic bearing; 3. Drive assembly; 31. Cooler; 311. Cooling channel; 3111. Liquid inlet channel; 3112. Liquid outlet channel; 312. Annular support; 3121. First annular segment; 3122. Second annular segment; 3123. Third annular segment; 3124. Fourth annular segment; 3125. Lead wire channel; 3126. Positioning groove; 313. Connector plate; 3131. First baffle; 3132. Second baffle; 3133. Serpentine flow channel 3134, Fifth flow channel; 314, Support end cover; 3141, Fifth annular segment; 3142, Sixth annular segment; 3143, Seventh annular segment; 3144, First flow channel; 3145, Drain connector; 3146, Liquid receiving cavity; 3147, Turntable; 3148, Fourth flow channel; 32, Rotating outer shell; 321, Front cover; 322, Rear cover; 323, Shell sleeve; 324, Flange; 33, Inner stator winding; 34, Outer stator winding; 35, Outer rotor; 36, Inner rotor; 371, Annular structure; 3711, Insertion channel; 372, First protrusion; 373, Second protrusion; 4, Encoder; 5, First rotating shaft; 51, Fixed baffle; 52, Second flow channel; 53, Third flow channel; 54, Drain pipe; 6, Bearing; 7, Second rotating shaft. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0046] This application discloses a high-speed output motor.

[0047] like Figure 1 and Figure 2The high-speed output motor includes a sealed housing 1, on which an air extraction connector 11 is provided. A magnetohydrodynamic bearing 2 is provided at the extended end of the shaft of the sealed housing 1. A drive assembly 3 for driving the shaft rotation is provided inside the sealed housing 1. The air extraction connector 11 is used to evacuate the interior of the sealed housing 1, maintaining a low-pressure or vacuum state inside the motor to significantly reduce gas friction between the rotating parts and the air, thereby reducing windage losses. Simultaneously, the inner ring of the magnetohydrodynamic bearing 2 is fixedly fitted to the shaft, forming a magnetohydrodynamic sealing layer between its inner and outer rings. This magnetohydrodynamic sealing layer has good airtightness and self-healing properties under the action of a magnetic field, maintaining a stable sealing state when the shaft rotates at high speed, achieving a non-contact dynamic seal at the shaft. The drive assembly 3 drives a single-shaft output, or it can drive a dual-shaft output. The magnetohydrodynamic bearing 2 can be installed inside the end of the sealed housing 1 and tightly fitted to the shaft.

[0048] like Figure 1 , Figure 2 and Figure 3 In this embodiment, the sealing housing 1 includes a front cover 12, a rear cover 13, and a middle housing 14. The front cover 12 is connected to one end of the middle housing 14 via a flange, and the rear cover 13 is connected to the other end of the middle housing 14 via a flange. An annular sealing ring (not shown in the figure) is provided at the connection points between the front cover 12 and the middle housing 14, and at the connection points between the rear cover 13 and the middle housing 14. An external wiring connector 15, a liquid inlet connector 16, and a liquid outlet connector 17 are connected to the circumferential surface of the front cover 12. An inlet channel 121 and an outlet channel 122 are provided inside the front cover 12. One end of the inlet channel 121 is connected to the inlet connector 16, and the other end extends to the end face of the front cover 12 facing the rear cover 13. One end of the outlet channel 122 is connected to the outlet connector 17, and the other end extends to the end face of the front cover 12 facing the rear cover 13. Furthermore, the front cover 12 is provided with an annular protrusion 123, which can serve as a support and positioning part for internal components of the motor. The air extraction connector 11 is installed on the rear cover 13.

[0049] Several weight-reduction grooves are provided on the front cover 12 to reduce the overall weight of the motor. One magnetohydrodynamic bearing 2 is bolted and sealed to the end face of the front cover 12 opposite to the rear end, and another magnetohydrodynamic bearing 2 is integrated into the rear cover 13. Both the front cover 12 and the rear cover 13 are coaxially mounted with encoders 4.

[0050] like Figure 2 and Figure 4In this embodiment, the drive assembly 3 is used to drive the dual-axis output. The drive assembly 3 includes a cooler 31 and a rotating housing 32. The cooler 31 has a sleeve-shaped structure and a cooling channel 311 is provided inside the cooler 31. When the cooler 31 is fixedly connected to the front end cover 12, the liquid inlet channel 121 and the liquid outlet channel 122 are both connected to the cooling channel 311. The cooler 31 has an inner stator winding 33 along its inner peripheral wall and an outer stator winding 34 along its outer peripheral wall. A first rotating shaft 5 is rotatably mounted inside the cooler 31. Specifically, bearings 6 are installed at both ends of the cooler 31, and the bearings 6 are sleeved on the first rotating shaft 5. The first rotating shaft 5 is coaxial with the cooler 31. The open end of the cooler 31 is fixed to the front end cover 12, so that the first rotating shaft 5 extends out of the open end of the cooler 31 and the front end cover 12. An inner rotor 36 is arranged along the outer circumference of the first rotating shaft 5. Two fixed baffles 51 are fixed on the first rotating shaft 5, and the inner rotor 36 is clamped between the two fixed baffles 51. The rotating outer shell 32 is rotatably mounted on the cooler 31. Specifically, bearings 6 are also provided at both ends of the outer peripheral wall of the cooler 31, and the rotating outer shell 32 is supported on the bearings 6, that is, the bearings 6 are fitted inside the rotating outer shell 32. Both ends of the rotating outer shell 32 are open. The end of the rotating outer shell 32 away from the front end cover 12 is connected to a second rotating shaft 7, which extends out of the rear end cover 13. An outer rotor 35 is installed on the inner peripheral wall of the rotating outer shell 32. A gap is left between the rotating outer shell 32 and the sealing shell 1 to prevent sliding friction between them, but their proximity facilitates heat transfer from the outer rotor 35 to the outside.

[0051] like Figure 4 and Figure 5 Specifically, in order to improve assembly efficiency, the cooler 31 can be designed as a split type, while the outer stator winding 34 and the inner stator winding 33 can be designed as an integral type. For example, the cooler 31 includes an annular support 312, with a plurality of plug-in plates 313 arranged along its circumference. The plug-in plates 313 are disposed on the end face of the annular support 312, and the end of the annular support 312 away from the plug-in plates 313 is bolted to the front end cover 12. The plug-in plates 313 are equidistantly arranged along the circumference of the annular support 312, and cooling channels 311 are formed within the plug-in plates 313 and the annular support 312. The annular support 312 and the plug-in plates 313 are integrally formed using an additive manufacturing process.

[0052] The integral stator structure includes an annular structure 371. The annular structure 371 has several first protrusions 372 equidistantly arranged along its outer peripheral wall, and several second protrusions 373 equidistantly arranged along its inner peripheral wall. Coils are wound on the first protrusions 372 to form an outer stator winding 34, and coils are wound on the second protrusions 373 to form an inner stator winding 33. The first protrusions 372, second protrusions 373, and annular structure 371 are integrally formed and made of silicon-iron alloy. Mounting slots can be formed within both the first protrusions 372 and second protrusions 373, and magnets can be installed in these slots to assist in excitation.

[0053] The annular structure 371 has several insertion channels 3711 opened along its circumference. The insertion channels 3711 extend to both ends of the annular structure 371. The insertion channels 3711 correspond one-to-one with the insertion plates 313. The insertion plates 313 are inserted into the corresponding insertion channels 3711. The ends of the insertion plates 313 away from the annular support 312 are bolted together with a support end cap 314. The support end cap 314 and the annular support 312 work together to clamp the annular structure 371.

[0054] During installation, simply wind coils onto each of the first protrusions 372 and the second protrusion 373 to form a winding, then insert the plug plate 313 on the cooler 31 into the corresponding plug channel 3711, install the support end cover 314 at the end of the plug plate 313, and then insert the first rotating shaft 5 into the support end cover 314 to achieve quick assembly.

[0055] like Figure 6 and Figure 7 To further reduce the frictional resistance and overall weight of bearing 6, thereby making it more suitable for high-speed output conditions, the annular support 312 further includes a first annular segment 3121, which is connected to the plug plate 313. The first annular segment 3121 is connected to a second annular segment 3122, the outer diameter of which is smaller than that of the first annular segment 3121. The second annular segment 3122 is connected to a third annular segment 3123, the outer diameter of which is smaller than that of the second annular segment 3122. The third annular segment 3123 is connected to a fourth annular segment 3124, the outer diameter of which is smaller than that of the third annular segment 3123.

[0056] The support end cap 314 includes a fifth annular segment 3141, which is connected to the plug-in plate 313. The fifth annular segment 3141 is connected to a sixth annular segment 3142, the outer diameter of which is smaller than that ... larger than that of which is smaller than that of which is smaller than that of which is larger than that of which is smaller than that of which is larger than that of which is smaller than that of which is larger than that of which is smaller than that of which is larger than that of which is smaller than that of which is larger than that of which is smaller than that of which is The inner ring of the bearing 6 in the seventh annular segment 3143 abuts against the end face of the sixth annular segment 3142, the outer ring of the bearing 6 supports the rotating housing 32, and there is a gap between the outer ring of the bearing 6, the cage and the end face of the fifth annular segment 3141. The inner ring of the bearing 6 in the fourth annular segment 3124 abuts against the end face of the third annular segment 3123, the outer ring of the bearing 6 supports the rotating housing 32, and there is a gap between the outer ring of the bearing 6, the cage and the end face of the second annular segment 3122.

[0057] This design effectively avoids sliding friction between bearing 6 and the stepped surface of the shaft. While ensuring the stable operation of bearing 6, this structure further reduces frictional resistance and rotational energy consumption, and improves the stability and reliability of the motor at high speed.

[0058] Furthermore, the second annular segment 3122 also has a weight-reducing groove on its circumference, and the second annular segment 3122 also has a weight-reducing channel that runs through both ends of it. The annular support 312 has a lead wire channel 3125 that runs through the end face of the first annular segment 3121 facing the inner stator winding 33 and through the circumference of the fourth annular segment 3124, further reducing the overall weight.

[0059] like Figure 2 The rotating outer casing 32 includes a front cover 321, a rear cover 322, and a casing sleeve 323. The outer rotor 35 is installed inside the casing sleeve 323. The front cover 321 and the rear cover 322 are each connected to a flange at one end of the casing sleeve 323, and the front cover 321 and the rear cover 322 together abut against the outer rotor 35. The outer ring of the bearing 6 on the fourth annular segment 3124 supports the front cover 321, and the outer ring of the bearing 6 on the seventh annular segment 3143 supports the rear cover 322. The rear cover 322 is connected to a flange 324, which is connected to the second rotating shaft 7. Both the front cover 321 and the rear cover 322 are annular conical structures, and their circumferential surfaces are provided with weight-reducing grooves. During assembly, the front cover 321 is placed on the bearing 6, and then the front cover 321 is connected to the housing sleeve 323. When the rear cover 322 is connected and tightened, the front cover 321 and the rear cover 322 simultaneously press against the outer rotor 35 and the bearing 6, making assembly convenient.

[0060] like Figure 3 and Figure 7The cooling flow channel 311 inside the cooler 31 can be specifically designed to include an inlet flow channel 3111 and an outlet flow channel 3112, both of which are opened in the annular support 312. Both the inlet channel 3111 and the outlet channel 3112 extend to the end of the first annular segment 3121 facing the plug-in plate 313, and then extend along the extension direction of the second annular segment 3122, the third annular segment 3123 and the fourth annular segment 3124, extending to the end of the fourth annular segment 3124 away from the plug-in plate 313. The end face of the fourth annular segment 3124 is provided with a positioning groove 3126, and the front end cover 12 is provided with a positioning hole 124. When the positioning hole 124 is aligned with the positioning groove 3126 and the annular protrusion 123 is inserted into the fourth annular segment 3124, the inlet channel 121 is connected to the inlet channel 3111, and the outlet channel 122 is connected to the outlet channel 3112.

[0061] like Figure 7 and Figure 8 The plug-in plate 313 has a hollow structure. At least one first baffle 3131 and at least one second baffle 3132 are provided inside the plug-in plate 313. The first baffle 3131 and the second baffle 3132 are spaced apart. The first baffle 3131 is connected to the end of the plug-in plate 313 near the annular support 312 and has space left with the end of the plug-in plate 313 near the support end cap 314. The second baffle 3132 is connected to the end of the plug-in plate 313 near the support end cap 314 and has space left with the end of the plug-in plate 313 near the annular support 312, thereby forming a serpentine flow channel 3133. In this embodiment, each plug-in plate 313 has two first baffles 3131 and one second baffle 3132. The inlet and outlet ends of the serpentine flow channel 3133 both extend into the annular support base 312. Furthermore, in two adjacent serpentine channels 3133, the inlet end of one serpentine channel 3133 is connected to the inlet channel 3111, and the outlet channel 3112 of the other serpentine channel 3133 is connected to the outlet channel 3112. In the remaining two adjacent serpentine channels 3133, the inlet end of one serpentine channel 3133 is connected to the outlet end of the other serpentine channel 3133, and the connecting channel of the two adjacent serpentine channels 3133 is opened in the annular support 312.

[0062] After entering the annular support base 312 through the inlet channel 3111, the coolant flows sequentially into the serpentine channels 3133 in each plug-in plate 313, flowing along the serpentine path to fully absorb the heat generated by the stator core. Then, it is connected to the next plug-in plate 313 through the internal channel of the annular support base 312, and finally discharged through the outlet channel 3112, forming a continuous circulating cooling path.

[0063] like Figure 9 , Figure 10 and Figure 11 Considering that the outer rotor 35 is close to the motor housing, heat can be easily transferred to the housing surface and dissipated easily. The outer stator winding 34 and the inner stator winding 33 are both cooled by the cooler 31. However, the inner rotor 36 is close to the motor central axis and is surrounded by the high heat source inner stator winding 33, so it is difficult for its own heat to be transferred out.

[0064] Therefore, it can be further provided that a first flow channel 3144 is provided inside the support end cap 314, and the first flow channel 3144 is connected to one of the serpentine flow channels 3133. Specifically, in the embodiment of this application, the first flow channel 3144 can be directly connected to the serpentine flow channel 3133 connected to the liquid inlet flow channel 3111. The first flow channel 3144 is designed along the extension direction of the support end cap 314 and extends to the end of the support end cap 314 facing the first rotating shaft 5. The liquid outlet of the first flow channel 3144 is coaxially arranged with the first rotating shaft 5, and the liquid outlet of the first flow channel 3144 is connected to a liquid outlet connector 3145. The liquid outlet connector 3145 is coaxial with the first rotating shaft 5 and is sealed and rotatably connected. The first rotating shaft 5 is coaxially provided with a second flow channel 52 along its length direction. The first rotating shaft 5 is also provided with a number of third flow channels 53 along its length direction. The third flow channels 53 are arranged around the second flow channels 52 and connected to each other. The drain end of the third flow channel 53 extends to one end of the first rotating shaft 5 facing the support end cover 314, and the third flow channel 53 is connected to a drain pipe 54. The support end cap 314 has a liquid receiving cavity 3146 inside. The liquid receiving cavity 3146 is an annular cavity. The liquid receiving cavity 3146 is coaxially arranged around the liquid outlet end of the first flow channel 3144. The support end cap 314 is rotatably connected to a turntable 3147. The turntable 3147 seals the liquid receiving cavity 3146. The turntable 3147 is coaxial with the first rotating shaft 5. The drain pipe 54 is connected to the turntable 3147 and communicates with the liquid receiving cavity 3146. The support end cap 314 also has a fourth flow channel 3148, which communicates with the liquid receiving cavity 3146. The fourth flow channel 3148 is designed along the extension direction of the support end cap 314 and extends to the end of the support end cap 314 facing the insertion plate 313. One of the insertion plates 313 has a fifth flow channel 3134, which communicates with the fourth flow channel 3148 and the fifth flow channel 3134. The fifth flow channel 3134 communicates with the liquid outlet channel 3112. Specifically, in the embodiment of this application, the fifth flow channel 3134 is located at the insertion plate 313 that communicates with the liquid outlet channel 3112.

[0065] After passing through one of the serpentine flow channels 3133, the coolant can be diverted to the first flow channel 3144, and then discharged into the second flow channel 52 through the drain connector 3145. Next, it passes through the third flow channel 53, so that the heat of the inner rotor 36 can be transferred to the first rotating shaft 5 for heat dissipation. After being discharged from the third flow channel 53, the coolant enters the liquid receiving chamber 3146, and finally passes through the fourth flow channel 3148 and the fifth flow channel 3134 in sequence before being discharged into the outlet flow channel 3112.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-speed output motor, characterized in that: It includes a sealed housing (1), on which an air extraction connector (11) is provided, and a magnetohydrodynamic bearing (2) is provided at the extended end of the shaft of the sealed housing (1), and a drive assembly (3) for driving the shaft to rotate is provided inside the sealed housing (1).

2. The high-speed output motor according to claim 1, characterized in that: The drive assembly (3) includes a cooler (31) and a rotating housing (32). The cooler (31) is a sleeve-shaped structure. An inner stator winding (33) is provided along the inner circumference of the cooler (31). An outer stator winding (34) is provided along the outer circumference of the cooler (31). A first rotating shaft (5) is rotatably provided inside the cooler (31). The first rotating shaft (5) extends from one end of the sealed housing (1). An inner rotor (36) is provided on the first rotating shaft (5). The rotating outer shell (32) is rotatably mounted on the cooler (31). A second rotating shaft (7) is connected to one end of the rotating outer shell (32) away from the first rotating shaft (5). The second rotating shaft (7) extends out of the sealed housing (1). An outer rotor (35) is provided inside the rotating outer shell (32). The cooler (31) is fixed inside the sealed housing (1).

3. The high-speed output motor according to claim 2, characterized in that: It also includes an annular structure (371), wherein the annular structure (371) has a plurality of first protrusions (372) equidistantly arranged along its outer periphery, and a plurality of second protrusions (373) equidistantly arranged along its inner periphery. Each first protrusion (372) can be wound with a coil to form the outer stator winding (34), and each second protrusion (373) can be wound with a coil to form the inner stator winding (33). The annular structure (371) has a plurality of insertion channels (3711) opened along its circumference, and the insertion channels (3711) extend to both ends of the annular structure (371). The cooler (31) includes an annular support base (312), and the annular support base (312) is provided with a plurality of plug-in plates (313) along its circumference. The plug-in plates (313) correspond one-to-one with the plug-in channels (3711). The annular support base (312) is fixedly connected to the sealing shell (1). The plug-in plates (313) are inserted into the corresponding plug-in channels (3711). The ends of the plurality of plug-in plates (313) away from the annular support base (312) are connected to a support end cap (314). Cooling channels (311) are provided in both the plug plate (313) and the annular support base (312).

4. The high-speed output motor according to claim 3, characterized in that: The cooling channel (311) includes an inlet channel (3111) and an outlet channel (3112), both of which are formed within the annular support (312). The plug-in plate (313) has a cavity structure. At least one first baffle (3131) and at least one second baffle (3132) are provided inside the plug-in plate (313). The first baffle (3131) and the second baffle (3132) are spaced apart. The first baffle (3131) is connected to the end of the plug-in plate (313) near the annular support (312) and has space with the end of the plug-in plate (313) near the support end cap (314). The second baffle (3132) is connected to the end of the plug-in plate (313) near the support end cap (314) and has space with the end of the plug-in plate (313) near the annular support (312), thereby forming a serpentine flow channel (3133). In two adjacent serpentine channels (3133), the inlet end of one serpentine channel (3133) is connected to the inlet channel (3111), and the outlet channel (3112) of the other serpentine channel (3133) is connected to the outlet channel (3112). In the remaining two adjacent serpentine channels (3133), the inlet end of one serpentine channel (3133) is connected to the outlet end of the other serpentine channel (3133), and the connecting channel of the two adjacent serpentine channels (3133) is opened in the annular support (312).

5. The high-speed output motor according to claim 4, characterized in that: The sealed housing (1) includes a front cover (12), a rear cover (13), and a middle housing (14). The front cover (12) is sealed to one end of the middle housing (14), and the rear cover (13) is sealed to the other end of the middle housing (14). The front cover (12) is provided with an inlet connector (16) and an outlet connector (17). The front cover (12) is provided with an inlet channel (121) and an outlet channel (122). The annular support (312) is connected to the front cover (12), and the inlet flow channel (3111) flows through the inlet channel (121). The outlet flow channel (3112) communicates with the outlet channel (122). The front cover (12) is provided with an external wiring plug (15).

6. The high-speed output motor according to claim 3, characterized in that: The annular support base (312) includes a first annular segment (3121), which is connected to the plug-in plate (313). The first annular segment (3121) is connected to a second annular segment (3122), the outer diameter of which is smaller than that ... The support end cap (314) includes a fifth annular segment (3141), which is connected to the plug plate (313). The fifth annular segment (3141) is connected to a sixth annular segment (3142), the outer diameter of which is smaller than that ... larger than that of which is smaller than that of which is larger than that of which is smaller than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is larger than that of which is The inner ring of the bearing (6) of the seventh annular segment (3143) abuts against the end face of the sixth annular segment (3142), and the inner ring of the bearing (6) of the fourth annular segment (3124) abuts against the end face of the third annular segment (3123).

7. The high-speed output motor according to claim 6, characterized in that: The annular support (312) has a lead wire channel (3125) that extends to the end face of the first annular segment (3121) facing the inner stator winding (33) and extends to the circumference of the fourth annular segment (3124).

8. The high-speed output motor according to claim 6, characterized in that: The rotating outer shell (32) includes a front cover (321), a rear cover (322), and a housing sleeve (323). The outer rotor (35) is installed inside the housing sleeve (323). The front cover (321) and the rear cover (322) are each connected to a flange at one end of the housing sleeve (323), and the front cover (321) and the rear cover (322) together abut against the outer rotor (35). The outer ring of the bearing (6) on the fourth annular segment (3124) supports the front cover (321), and the outer ring of the bearing (6) on the seventh annular segment (3143) supports the rear cover (322). The rear cover (322) is connected to a flange (324), and the flange (324) is connected to the second rotating shaft (7).

9. The high-speed output motor according to claim 1, characterized in that: The fixed end of the magnetohydrodynamic bearing (2) is connected to an encoder (4).

10. The high-speed output motor according to claim 4, characterized in that: The support end cap (314) has a first flow channel (3144) inside, which is connected to one of the serpentine flow channels (3133). The drain end of the first flow channel (3144) is connected to a drain connector (3145). The drain connector (3145) is coaxial with the first rotating shaft (5) and is sealed and rotatably connected. The first rotating shaft (5) has a second flow channel (52) coaxially along its length. The first rotating shaft (5) also has several third flow channels (53) along its length. The third flow channels (53) are arranged around the second flow channels (52) and are connected to each other. The drain end of the third flow channel (53) is connected to a drain pipe (54). The support end cap (314) has a liquid receiving cavity (3146) inside. The support end cap (314) is rotatably connected to a turntable (3147). The turntable (3147) seals the liquid receiving cavity (3146). The turntable (3147) is coaxial with the first rotating shaft (5). The drain pipe (54) is connected to the turntable (3147) and communicates with the liquid receiving cavity (3146). The support end cap (314) also has a fourth flow channel (3148). A fifth flow channel (3134) is opened on one of the plug-in plates (313). The fourth flow channel (3148) communicates with the fifth flow channel (3134). The fifth flow channel (3134) communicates with the liquid outlet channel (3112).

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