Noise reduction and anti-vibration system for motor cooling fan for automobile

Abstract

The invention relates to an automobile electrical machine heat dissipation fan noise-reduction and anti-vibration system. An electrical machine includes a pedestal, an electrical machine housing which is arranged on the pedestal, a rear cover which is in fixed connection to the electrical machine housing, heat dissipation fins which are evenly disposed on the electrical machine housing, a drive shaft which is disposed inside the electrical machine housing and an electromagnetic coil. An apparatus includes a hydraulic coupler which is in transmission connection to the drive shaft, heat dissipation blades which are evenly disposed in the periphery of a turbine of the hydraulic coupler, an electromagnetic clutch which brings a pump impeller of the hydraulic coupler and the drive shaft into transmission connection, a bypass cooling pipeline which is arranged in the electromagnetic coil, an electromagnetic valve which is disposed in the bypass cooling pipeline, and an ECU controller which is separate and electrical connection to the hydraulic coupler, the electromagnetic coupler and the electromagnetic valve. Compared with prior art, according to the invention, the system herein realizes heat dissipation by combining oil cooling and air cooling, in combination with a micropunch noise elimination structure, can effectively noise of an automobile electrical machine heat dissipation fan and reduce self vibration.

Description

technical field [0001] The invention belongs to the technical field of auto parts, and relates to a noise reduction and anti-vibration system, in particular to a noise reduction and anti-vibration system for a motor cooling fan used in an automobile. Background technique [0002] In recent years, pure electric vehicles have developed rapidly. People's requirements for the superior power of electric vehicles have led to the rapid application of high power density motors. Subsequently, the heat dissipation of the motor becomes the key to improving the performance of the motor. In addition to the good heat dissipation effect of the motor cooling fan for automobiles, the working noise of the fan is also a problem that people generally pay attention to. Fan noise is the amount of noise produced by the fan when it is working, which is affected by many factors. Fan noise is related to friction, air flow. The higher the fan speed and the greater the air volume, the greater the no...

AI Technical Summary

Problems solved by technology

The rotational vibration generated by it will cause the motor bearings to wear out gradually, causing the blades of the fan to loosen, thereby aggravating the rotational vibration of the fan blades, increasing the working noise of the cooling fan, and gradually deteriorating the working condition of the cooling fan

That is to say, when the center of gravity of the fan blade does not coincide with the axis of the motor, after the fan rotates, it is equivalent to an oscillator (an oscillator is an eccentric wheel added to the motor shaft). As the use time becomes longer, The gradual wear of the fan bearings will loosen the cooling fins of the fan, which will aggravate the vibration and noise

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