CN216699737U

CN216699737U - Liquid-cold air cooling integrated EVTOL power motor

Info

Publication number: CN216699737U
Application number: CN202220074773.4U
Authority: CN
Inventors: 周六招; 赵莹
Original assignee: Shenzhen Feiyao Motor Technology Co ltd
Current assignee: Shenzhen Feiyao Motor Technology Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-06-07
Anticipated expiration: 2032-01-12

Abstract

The utility model discloses a liquid-cold-air cooling integrated EVTOL power motor.A front cover and a rear cover are respectively arranged at openings at the front end and the rear end of a rotor, and a radiating fan in transmission connection with the front cover is arranged in the rotor, so that the rotor can simultaneously drive the radiating fan to carry out air-cold heat radiation on a machine body when rotating; meanwhile, the front cover and the rear cover adopt the design idea of an axial flow fan, after the rotor rotates, the front cover can press air into the machine body, and the rear cover can pump the air out of the machine body, so that the air circulation in the machine body is improved, and the heat dissipation power is increased; the stator is provided with a loop for flowing of cooling medium, and a liquid inlet and a liquid outlet communicated with the loop, and the special heat exchanger is matched to realize that the cooling medium can circulate to take away heat of the motor body, so that the heating of the power motor is further reduced, and the power density of the motor is improved.

Description

Liquid cold wind cold integration formula EVTOL power motor

Technical Field

The utility model relates to the technical field of power motors, in particular to a liquid-cooling and air-cooling integrated EVTOL power motor.

Background

EVTOL (collectively known as Electric Vertical Takeoff and Landing), Chinese translates to-an Electric VTOL aerial vehicle. In recent years, EVTOL aircraft have been developed by various well-known airlines around the world, and are generally called flying cars or electric manned aircraft. The leading business includes Boeing, air bus, Bell, Luo, Daimler, Toyota, Jili, and the like, and the first-time enterprises include Volocopter and Lilium in Germany, Joby, Archer, Wisk, Beta in the United states, and Yihang in China (NASDAQ: EH).

The traditional aviation aircraft uses a fuel engine, which is generally a turbofan engine or a turboprop engine; EVTOL is driven using electric power, and requires a power motor with high power density to provide torque to a plurality of propellers. The EVTOL generally uses 8 or more power motors to provide air thrust for take-off, landing and cruising for the whole machine, and compared with a fuel power system, the EVTOL has a plurality of numbers and more complex working conditions. The aircraft needs to overcome changeable climatic conditions and temperature and humidity environments during operation; especially, the load is sharply increased during the taking off and landing, a larger design margin is needed for a power system, and a sufficient power margin and heat dissipation power are needed for the motor.

At present, no special motor series for engineering exists in the market, some developments are made by some scientific research institutes at home and abroad, but the power motor for engineering mass production cannot be met. The existing motor can not meet the requirements of the EVTOL on the power density and the heat dissipation power density of the motor generally, and the power density of a common industrial servo motor is very low; increasing the power requirements for the motor selection results in an increase in aircraft weight beyond the maximum takeoff weight and therefore is not adequate for EVTOL.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model mainly aims to provide a liquid-cold-air cooling integrated EVTOL power motor, aiming at improving the heat dissipation power of the motor and further providing the power density of the whole machine.

In order to achieve the purpose, the liquid-cooling and air-cooling integrated EVTOL power motor comprises a rotor and a stator, wherein the rotor is arranged in a hollow mode, a front cover and a rear cover are respectively arranged at openings at the front end and the rear end of the rotor, a heat dissipation fan is arranged in a cavity, and the heat dissipation fan is in transmission connection with the front cover;

the front cover and the rear cover are respectively provided with a first curve rib and a second curve rib which are uniformly distributed around the axle center of the rotor, the first curve rib is bent along a first rotating direction, the second curve rib is bent against the first rotating direction, a first vent hole is formed between every two adjacent first curve ribs, and a second vent hole is formed between every two adjacent second curve ribs;

the stator is arranged in the hollow cavity of the rotor, and is provided with a loop for cooling medium to flow, and a liquid inlet and a liquid outlet which are communicated with the loop.

Optionally, the stator has an accommodating cavity, and the cooling fan is disposed in the accommodating cavity.

Optionally, a planetary gear set is arranged in the accommodating cavity, a central shaft of the cooling fan is connected with a power output tooth of the planetary gear set, and the front cover is connected with the power input tooth of the planetary gear set through a rotating shaft.

Optionally, the front end and the rear end of the stator are respectively sleeved with a first bearing and a second bearing, the front cover is clamped on the outer ring of the first bearing, and the rear cover is clamped on the outer ring of the second bearing.

Optionally, the first bearing is a cross roller bearing.

Optionally, the inner side of the front cover is provided with a first sand-proof net, and the inner side of the rear cover is provided with a second sand-proof net.

The front cover and the rear cover are respectively arranged at the openings at the front end and the rear end of the rotor, and the heat dissipation fan in transmission connection with the front cover is arranged in the rotor, so that the rotor can simultaneously drive the heat dissipation fan to cool and dissipate heat of a machine body when rotating;

meanwhile, the front cover and the rear cover adopt the design idea of an axial flow fan, the front cover and the rear cover are respectively provided with a first curve rib and a second curve rib which are uniformly distributed around the axis of the rotor, the first curve rib is bent along a first rotating direction, the second curve rib is bent along the reverse direction of the first rotating direction, a first vent hole is formed between every two adjacent first curve ribs, and a second vent hole is formed between every two adjacent second curve ribs, so that after the rotor rotates, the front cover can press air into the machine body, the rear cover can pump the air out of the machine body, the air circulation inside the machine body is improved, and the heat dissipation power is increased;

the stator is provided with a loop for flowing of cooling medium, and a liquid inlet and a liquid outlet communicated with the loop, and the special heat exchanger is matched to realize that the cooling medium can circulate to take away heat of the motor body, so that the heating of the power motor is further reduced, and the power density of the motor is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a liquid-cooled air-cooled integrated EVTOL power motor according to the present invention;

FIG. 2 is a schematic structural diagram of another view angle of an embodiment of the liquid-cooled air-cooled integrated EVTOL power motor according to the present invention;

fig. 3 is a cross-sectional view of an embodiment of the liquid-cooled air-cooled integrated EVTOL power motor of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3 in the specification, an embodiment of the utility model provides a liquid-cooling and air-cooling integrated EVTOL power motor, which includes a rotor 100, a stator 200, a front cover 300, a rear cover 400, and a cooling fan 600. The rotor 100 is hollow, the inner wall of the rotor is provided with the permanent magnet 110, and the front cover 300 and the rear cover 400 are respectively inserted into the front opening and the rear opening of the rotor 100 and are locked on the rotor 100 through screws. The stator 200 is disposed in the hollow cavity of the rotor 100, and the outer circumference thereof is sleeved with a winding 210, the front end portion thereof extends toward the front cover 300 and is sleeved with a first bearing 220, and the front cover 300 is clamped on the outer ring of the first bearing 220. The rear end of the stator 200 extends toward the rear cover 400 and passes through the rear cover 400, the second bearing 230 is sleeved on the rear end, and the rear cover 400 is clamped on the outer ring of the second bearing 230. Thereby, the rotor 100 and the stator 200 are rotatably engaged.

In the present embodiment, a receiving cavity is formed in the stator 200, the heat dissipation fan 600 is disposed in the receiving cavity, and the front cover 300 is provided with a rotating shaft 320, and the rotating shaft 320 is inserted into the receiving cavity and coaxially connected with the central shaft 610 of the heat dissipation fan 600. Therefore, the rotor 100 can drive the heat dissipation fan 600 to cool the machine body when rotating. And, through set up the holding chamber in stator 200, can set up radiator fan 600 in stator 200 to do benefit to and reduce the volume and the weight of whole motor, further improve the power density of motor.

Meanwhile, a circuit 200a through which a cooling medium flows, and a liquid inlet and a liquid outlet communicating with the circuit 200a are provided on the stator 200. The liquid inlet is connected with a liquid inlet pipe 710, the liquid outlet is connected with a liquid outlet pipe 720, and the free ends of the liquid inlet pipe 710 and the liquid outlet pipe 720 extend out of the stator 200 from the vent hole on the stator 200 and are communicated with an external special heat exchanger. Therefore, the heat of the machine body can be taken away by cooling medium circulation through the special heat exchanger, the heating of the power motor is further reduced, and the power density of the motor is improved.

In this embodiment, the front cover 300 and the rear cover 400 adopt the design concept of the axial flow fan, the first curved rib 300a and the second curved rib 400a which are uniformly distributed around the axis of the rotor 100 are respectively arranged on the front cover 300 and the rear cover 400, the first curved rib 300a is bent along the first rotating direction, the second curved rib 400a is bent along the reverse first rotating direction, a first vent hole is formed between the adjacent first curved ribs 300a, and a second vent hole is formed between the adjacent second curved ribs 300 b. Thus, when the rotor 100 is rotated, the front cover 300 and the rotor 100 form the suction fan 600, and air can be pressed into the body; the rear cover 400 and the rotor 100 form an air extracting fan 600, which can extract air from the body, thereby forming a ventilation system with front pressure and rear air extraction, improving air circulation in the body, and increasing heat dissipation power.

Preferably, a planetary gear set 500 is further disposed in the receiving cavity of the stator 200, the central shaft 610 of the heat dissipation fan 600 is connected to the power output teeth of the planetary gear set 500, and the rotating shaft 320 of the front cover 300 is connected to the power input teeth of the planetary gear set 500. Planetary gear set 500 can give radiator fan 600's acceleration rate on the rotational speed basis of motor, and then for the motor provides enough big air volume, is convenient for control the inside heat gathering of motor power more effectively, reduces the motor and generates heat, avoids the motor that the motor generates heat and leads to become invalid.

Preferably, a first sand-proof net 310 is disposed on the inner side of the front cover 300, and a second sand-proof net 410 is disposed on the inner side of the rear cover 400, so as to prevent the sand particles from outside from affecting the normal operation of the motor.

Preferably, in the present embodiment, the first bearing 220 is a cross roller bearing, so as to facilitate the motor to output more stable torque.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A liquid cold air cooling integrated EVTOL power motor comprises a rotor and a stator, and is characterized in that,

the rotor is arranged in a hollow manner, the front end and the rear end of the rotor are respectively provided with a front cover and a rear cover, a heat radiation fan is arranged in the cavity, and the heat radiation fan is in transmission connection with the front cover;

2. The liquid-cooled, air-cooled integrated EVTOL power motor of claim 1, wherein the stator has a receiving cavity, and the heat dissipation fan is disposed in the receiving cavity.

3. The integrated liquid-cooled and air-cooled EVTOL power motor as claimed in claim 2, wherein a planetary gear set is arranged in the accommodating cavity, a central shaft of the heat dissipation fan is connected with a power output tooth of the planetary gear set, and the front cover is connected with a power input tooth of the planetary gear set through a rotating shaft.

4. The integrated liquid-cooled and air-cooled EVTOL power motor as claimed in claim 1, wherein a first bearing and a second bearing are respectively sleeved at the front end and the rear end of the stator, the front cover is clamped on an outer ring of the first bearing, and the rear cover is clamped on an outer ring of the second bearing.

5. The integrated liquid cooling and air cooling EVTOL electric power motor of claim 4, wherein the first bearing is a crossed roller bearing.

6. The integrated liquid-cooled and air-cooled EVTOL power motor as claimed in claim 1, wherein a first sand-proof net is arranged on the inner side of the front cover, and a second sand-proof net is arranged on the inner side of the rear cover.