Centrifugal air compressor cooling structure driven by ultra-high-speed permanent magnet motor
An air compressor, permanent magnet motor technology, applied in the magnetic circuit shape/style/structure, electrical components, electric components, etc., can solve the problems of motor power drop, complex structure, permanent magnet demagnetization, etc., to improve stability and performance. The effect of efficiency
Inactive Publication Date: 2015-04-15
XI AN JIAOTONG UNIV
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Problems solved by technology
The overheating of the permanent magnet not only causes the power of the motor to drop, but also increases the load current of the stator to cause serious heating, and may even lead to permanent demagnetization of the permanent magnet
General high-speed permanent magnet motor stator can be cooled by immersion oil or surface circulating water, but this structure needs to be equipped with corresponding oil station, water pump and circulating heat dissipation system, the structure is relatively complicated, and the cooling effect on the rotor is not good
Method used
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Embodiment Construction
[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0013] refer to figure 1 , figure 2 and image 3 , a centrifugal air compressor cooling structure driven by an ultra-high-speed permanent magnet motor, including a motor-driven high-speed centrifugal air compressor, the second bearing seat 8 of the compressor and the second radial bearing sleeve 11 are matched with the rotor 15 through clearance Support one end of the rotor 15, the first bearing seat 5 and the first radial bearing sleeve 3 support the other end of the rotor 15 by clearance fit with the rotor 15, one end of the rotor 15 is clearance fit with the fan 1 and fastened with the first screw 2, the rotor 15 The other end is fitted with the impeller 14 and fastened by the second screw 16. The fan shroud 4 is connected with the first bearing seat 5 and the casing 6 by screws. To achieve positioning, the elastic foil air dynamic pressure thrust bear...
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The invention discloses a centrifugal air compressor cooling structure driven by an ultra-high-speed permanent magnet motor. According to the centrifugal air compressor cooling structure, suction force generated by a fan or series connection of the fan and an impeller when the motor rotates in a high speed is utilized for sucking external cooling air into a cavity of the motor to carry out cooling on the motor through a stator winding external cooling air duct, a stator winding internal cooling air duct and a rotor outer surface cooling air duct. Therefore, full air cooling can be fully achieved, and additional driving devices such as oil stations or water pumps are not needed. The air is not only a working medium of a centrifugal impeller, but also a cooling medium of the ultra-high-speed permanent magnet motor, the centrifugal air compressor cooling structure is simple, economical, and suitable for high-power-density centrifugal rotating machinery which is supported by air bearings and driven by the ultra-high-speed permanent magnet motor.
Description
technical field [0001] The invention relates to the technical field of ultra-high-speed permanent magnet motor cooling, in particular to a cooling structure of a centrifugal air compressor driven by an ultra-high-speed permanent magnet motor. Background technique [0002] The heat dissipation design of a high-speed permanent magnet motor is as important as the electromagnetic design itself. The permanent magnets in the rotor of a high-speed permanent magnet motor are very sensitive to heat. The overheating of the permanent magnet not only causes the power of the motor to drop, but also increases the load current of the stator to cause serious heating, and may even lead to permanent demagnetization of the permanent magnet. General high-speed permanent magnet motor stator can be cooled by immersion oil or surface circulating water, but this structure needs to be equipped with corresponding oil station, water pump and circulating heat dissipation system, the structure is relat...
Claims
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IPC IPC(8): H02K9/06H02K1/20
Inventor 孙岩桦程文杰陈振飞卓明虞烈
Owner XI AN JIAOTONG UNIV