Bearing cooling method and structure

Abstract

The invention discloses a low-floor light-rail vehicle traction motor bearing cooling method, which is characterized in that: a multi-path wind cooling way is adopted; vent holes are reserved on a root part at a fan inlet of a motor; cold wind entering a fan is formed into a plurality of air flow branches by the vent holes on the root part at the fan inlet, and the air flow branches enter the back parts of fan blades, are directly blown to the end closure part of a bearing and then climbs over a stator frame along the lateral surface of the stator frame; and the plurality of braches may be formed, are distributed uniformly, and form cyclonic eddies on the back part of the fan after entering the back part of the fan to cool a device on the bearing part so as to more directly cool the motor bearing.

Description

technical field [0001] The invention relates to a cooling method and structure for motor components, in particular to a cooling method and structure for a fully enclosed traction motor bearing of an electric locomotive. The motor bearing cooling method is mainly suitable for use in traction motors of low-floor light rail vehicles. Background technique [0002] The traction motor bearing is an important part to ensure the operation of the motor, so ensuring the performance of the motor bearing is very important for the traction motor. However, the bearings of traction motors will generate a lot of heat due to frictional damping during high-speed operation, and this heat will greatly affect the service life of the bearings; The cooling method of the bearing temperature rise of the motor bearing is mainly through its own heat dissipation. This cooling method can still meet the needs of some motors with low speed and small load, but for high-power, high-speed traction It is not...

AI Technical Summary

Problems solved by technology

The cooling method used in the current low-floor light rail vehicle traction motor is to use the air sucked by the ventilation fan at the rear of the entire motor to carry out air cooling (as attached figure 1 shown), but the current air-cooled structure only uses the wind discharged by the motor fan to blow through the stator frame to take away the heat from the motor bearing seat, and to take away the heat from the bearing itself through the bearing seat. This heat dissipation method is only one The indirect heat dissipation method is not to directly dissipate heat from the components of the bearing, but to cool the bearing seat through the heat dissipation of the stator frame relatively far away from the bearing, and then to cool the bearing through the bearing seat, so the effect is not very ideal, so it needs to be further improved. Improve

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