High-speed and large-capacity three-phase asynchronous motor

Abstract

The invention discloses a high-speed and large-capacity three-phase asynchronous motor, which comprises a base, a rotating shaft, a rotor, a stator, an end cover, bearings and a centrifugal fan. The end cover adopts a spigot structure with a concave portion and a convex portion. Multiple raised shaft ribs extending along the axis are uniformly distributed and fixedly arranged along the circumference on the peripheral surface of the middle shaft section of the rotating shaft. Multiple installation bosses are fixedly arranged at positions corresponding to the raised shaft ribs on the radial inner side of the centrifugal fan. The centrifugal fan sleeves the rotating shaft, and the installation bosses thereof are in butt joint with the raised shaft ribs. Balance rings are fixedly arranged on the axial outer sides of the centrifugal fan. End rings are respectively and fixedly arranged at the two axial ends of a rotor guide bar in the rotor. Guard rings are arranged in a matching manner on the outer sides of the end rings. Balance ring slots are arranged in the axial end faces of the guard rings. The overall strength of the motor is improved, which is beneficial to motor balance. The length of the shafting can be shortened, and the weight of the rotor can be reduced. The material cost of the motor is reduced while the critical speed of the rotor is increased.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a high-speed and large-capacity three-phase asynchronous motor. Background technique [0002] High-speed, high-voltage, and large-capacity motors are the most difficult points in motor manufacturing from electromagnetic performance to mechanical structure. High-speed and large-capacity motors have large vibration, low power level, and high noise. These are the common problems faced by motor manufacturers. In order to meet the strength requirements, high-speed and large-capacity motors often use more ribs on the machine base and thicker steel plates. In order to meet the balance requirements, add independent balance rings on both sides of the rotor (such as figure 1 As shown), the above measures not only waste materials but also make the entire motor rotor shaft system longer, which is not conducive to shortening the motor shaft system, reducing the weight of the rotor and increas...

AI Technical Summary

Problems solved by technology

High-speed and large-capacity motors have large vibration, low power level, and high noise. These are the common problems faced by motor manufacturers. In order to meet the strength requirements, high-speed and large-capacity motors often use more ribs on the machine base and thicker steel plates. In order to meet the balance requirements, add independent balance rings on both sides of the rotor (such as figure 1 As shown), the above measures not only waste materials but also make the entire motor rotor shaft system longer, which is not conducive to shortening the motor shaft system, reducing the weight of the rotor and increasing the critical speed of the rotor. It consumes materials and affects the strength and vibration of the motor. Constraints of design and manufacture

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