Ventilation cooling device for AC motor

Abstract

The invention relates to a ventilation and cooling device for an AC motor, which includes a cooling backpack fan, an air duct soft joint and an air duct air collection interface; the cooling backpack fan includes a fan casing, a fan motor installed on the fan casing, and a fan motor installed on the fan casing The inner centrifugal impeller, arc-shaped air collector and air cooling backpack; the centrifugal impeller is installed on the output shaft of the fan motor, the arc-shaped air collector is set on the centrifugal impeller, and the air-cooling backpack is in contact with the arc-shaped collector. The wind device is installed on the outer wall of the air inlet end of the fan casing, the air collection interface of the air duct is installed on the air outlet port of the fan casing, one end of the air duct soft joint is installed on the air collection interface of the air duct, and the other end Connect with the case. The ventilation and cooling device of the AC motor of the present invention can make the temperature rise of the AC motor normal and its winding insulation stable, effectively prevent the insulating material from aging and becoming brittle, prolong the service life of the motor, and the ventilation and cooling device is easy to install, and the ventilation effect is good and stable. High durability and easy maintenance.

Description

technical field [0001] The invention relates to an AC motor, in particular to a ventilation cooling device for the AC motor. Background technique [0002] AC motors are widely used in various industries, such as steel, electric power, coal, papermaking, pharmaceutical papermaking and other fields. Whether the temperature rise of the AC motor is normal or not is not only related to its working load, but also related to its working system. The selection of motor working system is usually determined according to the working conditions on site. However, in the actual use process, many motors have insulation failures, not because the insulation material is not good, but because the load is too large during operation, the ventilation and cooling effect of the motor is not ideal, causing the maximum temperature of the motor to exceed the maximum allowable value of the winding insulation material , When this limit is exceeded, the insulating material will age and become brittle, g...

AI Technical Summary

Problems solved by technology

Due to the fast pace of hot rolling production, one coil is rolled every 3 minutes on average, that is to say, the strip steel enters the pinch roll once every 3 minutes, and the strip steel works in the pinch roll for about 2.5 minutes. Affected by the impact load, the fan motor 8 installed in the fan blade cover 9 is caused to vibrate frequently, thereby causing the bearing of the fan motor 8 to heat up, causing the current of the fan motor 8 to rise, the temperature is high, the service life is shortened, and the cooling effect is reduced , and the fault frequency is high, which directly affects the heat dissipation of the main motor 11'

[0006] There is an encoder 6 inside the main motor 11', and a lot of dust and oil are adsorbed on the surface of the encoder 6, which makes the heat dissipation bad and affects its accuracy; the encoder handle 5 on which the encoder is installed is covered with dust and oil, It is easy to cause the deterioration of the buffering performance of the elastic handle, which causes the encoder 6 to generate calculation errors; more dust and oil stains are adsorbed on the blades of the impeller 7, which reduces the output efficiency of the fan 35 and deteriorates the stability of the dynamic balance of the impeller 7

[0007] To sum up, the original AC motor has the above defects in ventilation and cooling, which not only affects the insulation of the main motor and shortens its service life, but also affects the rhythm of production.

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