Device for controlling balance of end ring during pre-balanced high-speed rotation of motor rotor

Abstract

The invention discloses a device for controlling the balance of an end ring during pre-balanced high-speed rotation of a motor rotor. The device comprises a rotating shaft, a copper end ring, an outerhoop and inner snap rings, wherein the two inner snap rings sleeve the rotating shaft at intervals and are located at the two ends of an iron core respectively; the copper end ring is disposed on axial outer side of the inner snap rings; a lining is axially disposed in the inner snap rings and extends to the inner hole of the copper end ring; the copper end ring includes a conductive strip connecting ring piece and a stopping ring; the conductive strip connecting ring piece is concentrically disposed on the axial outer side of the stopping ring; the outer hoop sleeves the outer side of the copper end ring. According to the device for controlling the balance of an end ring during pre-balanced high-speed rotation of a motor rotor, the inner snap rings internally support the copper end ring,and by the cooperation of a second outer tapered surface and a second inner tapered surface cooperate and the cooperation of a first outer tapered surface and a first inner tapered surface, pre-tightening force is applied to the copper end ring during rotation, thereby reducing the radial deformation of the copper end ring rotating at high speed, and prolonging the service life.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a device for controlling end ring balance during pre-balanced high-speed rotation of motor rotors. Background technique [0002] Electric motors generally include a rotor mounted on a shaft within a stator. The rotor is divided into iron core and copper conductive elements, and the copper conductive elements are called copper conductive strips, which are placed along its periphery. The copper strips can be parallel to the axis or canted relative to the axis. At each end of the rotor, a copper end ring may be connected to a corresponding end of a copper busbar. Copper bus bars and copper end rings are made of special conductive materials, such as high-purity copper. Since the rotor rotates during normal operation, it must be ensured that the rotor is relatively balanced before using the motor. During the high-speed rotation of the rotor, it will bring high load to the rotor com...

AI Technical Summary

Problems solved by technology

However, when the rotation speed is faster, this additional rotation process may introduce some unbalance again, such as the radial deformation problem of the end ring discussed above, which needs to be improved

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