Motor rotor cooling structure

Abstract

The invention provides a rotor cooling structure which belongs to the field of motor cooling. A motor rotor is cooled as a whole by circulating pressed cooling oil fluid in the motor rotor. The motor rotor cooling structure comprises a high speed rotary joint, a ferrule-type pipe joint, a motor rotor body, a partially trepanned rotor shaft and the like. The high speed rotary joint comprises a bearing, a sealing ring and an external interface. The ferrule-type pipe joint comprises a ferrule, a nut, a joint body, a combined washer and the like. When aluminium casting is carried out at the corresponding position of the motor rotor body, a dummy shaft is used to cast an aluminum tube at the corresponding position of the rotor body, and a short circuit ring and the aluminum tube cast in the rotor body are cast into a whole body. A blind hole and a screw hole which fixes the ferrule-type pipe joint are arranged in the corresponding position of the partially trepanned rotor shaft. An oil collector comprises an oil collecting tank and a skeleton seal. According to the invention, the overall rotor body is cooled by the cooling oil fluid; the possibility of burning is reduced; the hidden danger of cooling fluid leakage is avoided; the vibration noise of a motor is reduced; and the service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the field of motor cooling, in particular to a squirrel-cage rotor oil cooling structure. Background technique [0002] Now the working current of the motor is large and the speed is high, so the motor itself will generate a lot of heat during the working process. The current motor cooling methods are limited, and the cooling effect is not obvious, so it is difficult to reduce the high temperature inside the motor. Since the resistivity of the insulating material between the internal windings of the motor will decrease at high temperature, if the temperature reaches a certain limit, the insulator will conduct electricity, short-circuit the internal windings of the motor, and in severe cases, a fire will occur. From this point of view, it is very important to design a reasonable cooling structure. [0003] At present, there are two types of cooling structures for most rotors. One is the air-cooling structure, that is, fan blad...

AI Technical Summary

Problems solved by technology

The current motor cooling methods are limited, and the cooling effect is not obvious, so it is difficult to reduce the high temperature inside the motor

Since the resistivity of the insulating material between the internal windings of the motor will decrease at high temperature, if the temperature reaches a certain limit, the insulator will conduct electricity, short-circuit the internal windings of the motor, and in severe cases, a fire will occur

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