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CN-122026656-A - High-rotation-speed output motor

CN122026656ACN 122026656 ACN122026656 ACN 122026656ACN-122026656-A

Abstract

The application relates to a high-rotation-speed output motor, which belongs to the technical field of motors and comprises a sealing shell, wherein an air extraction connector is arranged on the sealing shell, a magnetic fluid 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. The application has the effect of reducing the windmilling loss when the motor operates.

Inventors

  • YOU SUGANG

Assignees

  • 南京双南威动科技有限公司

Dates

Publication Date
20260512
Application Date
20260206

Claims (10)

  1. 1. The high-rotation-speed output motor is characterized by comprising a sealing shell (1), wherein an air extraction connector (11) is arranged on the sealing shell (1), a magnetic fluid bearing (2) is arranged at the extending end of a rotating shaft of the sealing shell (1), and a driving assembly (3) for driving the rotating shaft to rotate is arranged in the sealing shell (1).
  2. 2. The high-speed output motor according to claim 1, wherein the drive assembly (3) comprises a cooler (31) and a rotary housing (32), the cooler (31) is of a sleeve-shaped structure, an inner stator winding (33) is arranged along the inner circumference of the cooler (31), an outer stator winding (34) is arranged along the outer circumference of the cooler (31), a first rotating shaft (5) is rotatably arranged in the cooler (31), the first rotating shaft (5) extends out from one end of the sealed shell (1), and an inner rotor (36) is arranged on the first rotating shaft (5); The rotary shell (32) is rotationally sleeved on the cooler (31), one end, far away from the first rotating shaft (5), of the rotary shell (32) is connected with a second rotating shaft (7), the second rotating shaft (7) extends out of the sealing shell (1), and an outer rotor (35) is arranged in the rotary shell (32); The cooler (31) is fixed in the sealed housing (1).
  3. 3. The high-speed output motor according to claim 2, further comprising an annular structure body (371), wherein the annular structure body (371) is provided with a plurality of first protrusions (372) along the outer circumference thereof at equal intervals, the annular structure body (371) is provided with a plurality of second protrusions (373) along the inner circumference thereof at equal intervals, each first protrusion (372) can be wound with a coil to form the outer stator winding (34), each second protrusion (373) can be wound with a coil to form the inner stator winding (33), the annular structure body (371) is provided with a plurality of plugging channels (3711) along the circumference thereof, and the plugging channels (3711) penetrate to two end faces of the annular structure body (371); the cooler (31) comprises an annular supporting seat (312), a plurality of inserting plates (313) are arranged on the annular supporting seat (312) along the circumferential direction of the annular supporting seat, the inserting plates (313) are in one-to-one correspondence with the inserting channels (3711), the annular supporting seat (312) is fixedly connected with the sealing shell (1), the inserting plates (313) are inserted into the corresponding inserting channels (3711), and one ends, far away from the annular supporting seat (312), of the inserting plates (313) are commonly connected with a supporting end cover (314); a cooling flow passage (311) is formed in the plug board (313) and the annular supporting seat (312) together.
  4. 4. The high-speed output motor according to claim 3, wherein the cooling flow channel (311) comprises a liquid inlet flow channel (3111) and a liquid outlet flow channel (3112), and the liquid inlet flow channel (3111) and the liquid outlet flow channel (3112) are both arranged in the annular supporting seat (312); The plug board (313) is of a cavity structure, at least one first baffle bar (3131) and at least one second baffle bar (3132) are arranged in the plug board (313), the first baffle bar (3131) and the second baffle bar (3132) are arranged at intervals, the first baffle bar (3131) is connected with one end, close to the annular supporting seat (312), of the plug board (313), a space is reserved at one end, close to the supporting end cover (314), of the plug board (313), the second baffle bar (3132) is connected with one end, close to the supporting end cover (314), of the plug board (313), a space is reserved at one end, close to the annular supporting seat (312), of the plug board (313), and a snake-shaped flow channel (3133) is formed; Of the two adjacent serpentine channels (3133), the liquid inlet end of one serpentine channel (3133) is communicated with the liquid inlet channel (3111), and the liquid outlet channel (3112) of the other serpentine channel (3133) is communicated with the liquid outlet channel (3112); In the remaining two adjacent serpentine flow channels (3133), the liquid inlet end of one serpentine flow channel (3133) is communicated with the liquid outlet end of the other serpentine flow channel (3133), and the communicating flow channels of the two adjacent serpentine flow channels (3133) are arranged in the annular supporting seat (312).
  5. 5. The high-speed output motor of claim 4, wherein the sealed housing (1) comprises a front end cover (12), a rear end cover (13) and a middle housing (14), the front end cover (12) is in sealing connection with one end of the middle housing (14), the rear end cover (13) is in sealing connection with the other end of the middle housing (14), a liquid inlet joint (16) and a liquid outlet joint (17) are arranged on the front end cover (12), a liquid inlet channel (121) and a liquid outlet channel (122) are arranged in the front end cover (12), the annular supporting seat (312) is connected with the front end cover (12), the liquid inlet channel (3111) is in communication with the liquid inlet channel (121), the liquid outlet channel (3112) is in communication with the liquid outlet channel (122), and a line external plug (15) is arranged on the front end cover (12).
  6. 6. The high-speed output motor according to claim 3, wherein the annular support base (312) includes a first annular segment (3121), the first annular segment (3121) is connected to the plug board (313), the first annular segment (3121) is connected to a second annular segment (3122), an outer diameter of the second annular segment (3122) is smaller than an outer diameter of the first annular segment (3121), the second annular segment (3122) is connected to a third annular segment (3123), an outer diameter of the third annular segment (3123) is smaller than an outer diameter of the second annular segment (3122), the third annular segment (3123) is connected to a fourth annular segment (3124), and an outer diameter of the fourth annular segment (3124) is smaller than an outer diameter of the third annular segment (3123). The support end cover (314) comprises a fifth annular section (3141), the fifth annular section (3141) is connected with the plug board (313), the fifth annular section (3141) is connected with a sixth annular section (3142), the outer diameter of the sixth annular section (3142) is smaller than that of the fifth annular section (3141), the sixth annular section (3142) is connected with a seventh annular section (3143), the outer diameter of the seventh annular section (3143) is smaller than that of the sixth annular section (3142), bearings (6) are sleeved on the seventh annular section (3143) and the fourth annular section (3124), and the bearings (6) are sleeved in the rotary housing (32); the bearing (6) inner ring of the seventh annular segment (3143) is abutted against the end face of the sixth annular segment (3142), and the bearing (6) inner ring of the fourth annular segment (3124) is abutted against the end face of the third annular segment (3123).
  7. 7. The high-speed output motor according to claim 6, wherein a lead passage (3125) is provided in the annular support (312), and the lead passage (3125) extends through the end surface of the first annular segment (3121) facing the inner stator winding (33) and through the peripheral surface of the fourth annular segment (3124).
  8. 8. The high-speed output motor according to claim 6, wherein the rotary housing (32) comprises a front cover (321), a rear cover (322) and a housing sleeve (323), the outer rotor (35) is mounted in the housing sleeve (323), the front cover (321) and the rear cover (322) are respectively in flange connection with one end of the housing sleeve (323), the front cover (321) and the rear cover (322) are abutted against the outer rotor (35) together, an outer ring of a bearing (6) on the fourth annular section (3124) supports the front cover (321), an outer ring of a bearing (6) on the seventh annular section (3143) supports the rear cover (322), the rear cover (322) is connected with a flange plate (324), and the flange plate (324) is connected with the second rotating shaft (7).
  9. 9. The high-speed output motor according to claim 1, wherein the fixed end of the magnetic fluid bearing (2) is connected with an encoder (4).
  10. 10. The high-speed output motor according to claim 4, wherein a first flow channel (3144) is formed in the support end cover (314), the first flow channel (3144) is communicated with one of the serpentine flow channels (3133), a liquid discharge end of the first flow channel (3144) is connected with a liquid discharge joint (3145), the liquid discharge joint (3145) is coaxially and hermetically connected with the first rotating shaft (5), a second flow channel (52) is coaxially formed in the first rotating shaft (5) along the length direction of the first rotating shaft, a plurality of third flow channels (53) are further formed in the first rotating shaft (5) along the length direction of the first rotating shaft, the third flow channels (53) are arranged around the second flow channel (52) and are communicated with each other, and a liquid discharge pipe (54) is connected with the liquid discharge end of the third flow channel (53); Liquid holding cavity (3146) have been seted up in supporting end cover (314), supporting end cover (314) rotates and is connected with carousel (3147), carousel (3147) seal liquid holding cavity (3146), carousel (3147) with first pivot (5) are coaxial, fluid-discharge tube (54) with carousel (3147) are connected, and fluid-discharge tube (54) with liquid holding cavity (3146) intercommunication, fourth runner (3148) have still been seted up to supporting end cover (314), one of them the fifth runner (3134) have been seted up on pinboard (313), fourth runner (3148) with fifth runner (3134) intercommunication, fifth runner (3134) with play liquid runner (3112) intercommunication.

Description

High-rotation-speed output motor Technical Field The application relates to the technical field of motors, in particular to a high-rotation-speed output motor. Background During operation of the motor, there is typically some air gap between the stator and the rotor, and between the shaft and the housing. When the motor runs at a higher rotating speed, the rotating part can drive air in the shell to flow at a high speed, so that obvious gas friction resistance is formed. This resistance causes energy to be dissipated in the form of heat, thereby creating windmilling losses (also known as windage losses or ventilation losses). In the conventional motor structure, the stator winding end, the rotor surface, the shaft extension section, the ventilation channel and other parts can generate high-speed relative motion with air, and the parts are the main sources of wind mill loss. Particularly in a high-speed motor, the peripheral line speed of the rotor is high, and turbulence is formed in the stator-rotor gap and the winding end part area after the gas is forced to roll, so that the windmilling loss is obviously increased. Therefore, the temperature of the winding and the permanent magnet rises due to air friction heat generation, insulation and magnetic performance stability are affected, wind resistance can reduce mechanical output efficiency of the motor, and meanwhile, additional pneumatic noise and vibration are caused by turbulence. Disclosure of Invention In order to reduce the windmilling loss during the operation of the motor, the application provides a high-rotation-speed output motor. The application provides a high-rotation-speed output motor which adopts the following technical scheme: The utility model provides a high rotational speed output motor, includes sealed casing, be provided with the air extraction joint on the sealed casing, sealed casing's pivot stretches out the end and is provided with the magnetic fluid bearing, be provided with in the sealed casing and be used for driving pivot pivoted drive assembly. By adopting the technical scheme, the driving assembly is arranged in the sealed shell, and the vacuum pumping treatment is carried out on the inside of the sealed shell through the air suction connector, so that the inside of the motor is kept in a low-pressure or vacuum state, the gas friction between the rotating part and the air is obviously reduced, and the windmilling loss is reduced; Simultaneously, the inner ring of the magnetic fluid bearing is fixedly matched with the rotating shaft, A magnetic fluid sealing layer is formed between the inner ring and the outer ring. The magnetic fluid sealing layer has good air tightness and self-repairing property under the action of a magnetic field, can maintain a stable sealing state when the rotating shaft rotates at a high speed, and realizes non-contact dynamic sealing at the rotating shaft; Through the structural design, the motor can effectively reduce the wind mill loss and the shaft end air inlet risk while keeping high-speed operation, so that stable high-speed output operation is realized, and the working efficiency and long-term reliability of the motor are improved. Optionally, the driving assembly includes a cooler and a rotating housing, the cooler is of a sleeve-shaped structure, the cooler is provided with an inner stator winding along an inner circumference thereof, the cooler is provided with an outer stator winding along an outer circumference thereof, a first rotating shaft is rotationally arranged in the cooler, the first rotating shaft extends out from one end of the sealing shell, and an inner rotor is arranged on the first rotating shaft; the rotary shell is rotationally sleeved on the cooler, one end of the rotary shell, which is far away from the first rotating shaft, is connected with a second rotating shaft, and the second rotating shaft extends out of the sealing shell; The cooler is fixed within the sealed housing. By adopting the technical scheme, the outer rotor and the rotary shell can be driven to rotate after the outer stator winding is electrified so as to drive the second rotating shaft to output, and the inner rotor can be driven to rotate after the inner stator winding is electrified so as to drive the first rotating shaft to output, so that the high-rotating-speed bidirectional output can be realized. The structure does not need a complex mechanical transmission mechanism to realize reverse output, has high transmission efficiency and quick response, and is particularly suitable for occasions with high requirements on light weight and high power density, such as low-altitude economic aircrafts; the cooler not only serves as a cooling unit, but also serves as a support structure for both the inner and outer stator windings. One end of the cooler is fixed in the sealed shell, and the other end of the cooler is rotatably supported through the second rotating shaft, so that a stable supporting system is f