Centrifugal fan and closed motor with same

Abstract

The invention provides a centrifugal fan and a closed motor with the same, aiming at solving the problems of the obstructed air circulation in the closed motor. The centrifugal fan is provided with an air current guider which can transform the air current which is blown out of the blades of the centrifugal fan to circulate radially along the blades into the air current which circulate axially along the blades without being obstructed. After the centrifugal fan is arranged on one end of the closed motor, the air current which is blown out of the blades of the centrifugal fan can not do circular motion along the rotating shaft on one end of the closed motor but can enter the channel between the stator and the frame of the motor without being obstructed, thus the resistance of the system can be greatly reduced, the flow of centrifugal fan operating points can be improved, and the temperature rise speed in the closed motor can be slowed down.

Description

technical field [0001] The invention relates to the technical field of motors, more specifically, to a centrifugal fan and a hermetic motor provided with the centrifugal fan. Background technique [0002] In some occasions where the working environment is relatively harsh, the enclosure protection level of the motor generally adopts IP54, that is, it needs to meet the requirements of dustproof and spray-proof, so it generally adopts a fully enclosed structure. As a result, an internal air path will be formed to dissipate the copper loss at the protruding end of the stator winding and all losses on the rotor. At this time, if the air volume of the internal air passage is not large enough, the heat dissipation effect will be weak, and the temperature rise of the internal air will be high, resulting in a very high temperature rise of the rotor, which will directly affect the life of the motor. [0003] For such fully enclosed motors, such as airtight wind turbines, a centrifug...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that in the prior art, in a closed motor, after installing a centrifugal fan at one end of the motor to form an internal air path, the airflow cannot enter the motor frame slot or stator smoothly after being thrown out from the outlet of the centrifugal fan impeller. Pipeline, resulting in poor circulation of the internal air circuit, affecting the heat dissipation of the motor, providing a centrifugal fan that can solve the above problems and a hermetic motor with the centrifugal fan

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