Closed motor outer wind shield

Abstract

The invention discloses a closed motor outer wind shield comprising a motor outer wind shield and an outer fan. The closed motor outer wind shield is structurally characterized in that a pull-out cooling wind path is adopted, and cooling air in the cooling wind path first passes through a cooler, then the outer wind shield, and finally the outer fan. Cooling air loss and heating by the fan are avoided, the cooling effect of the cooler can be improved, the mechanical loss of a main motor can be reduced, and the overall material cost of the motor is lower than the cost of the original cooling device.

Description

technical field [0001] This patent relates to a closed motor outer wind cover, in particular to an outer wind cover which adopts a draw-out type external air path to improve the utilization rate of the motor external cooling air. Background technique [0002] The heat generation of the enclosed motor will reduce the service life, and the main parts of the heat generation are the stator and rotor windings. Therefore, the inside of the motor is enclosed and an internal fan is installed on the rotor shaft. The motor drives the internal fan to form an internal circulation inside the motor, and the heat exchange through the cooling tube of the cooler reduces the temperature rise inside the motor. At present, the general box-type motor is equipped with an external fan on the closed external rotor shaft. The motor runs to drive the external fan, and the external air is directly sent to the cooling pipe through the external windshield to reduce the temperature of the cooling pipe...

AI Technical Summary

Problems solved by technology

Blow-in air cooling air passes through the fan first and will be heated by the fan loss

Moreover, this structure does not make full use of the external air duct. When the loss is large, the motor needs to use more copper and silicon steel sheets to ensure the temperature rise of the motor, which leads to an increase in cost.

Images