Method for manufacturing thin-wall guard rings for large-sized high-speed motors

Abstract

The invention relates to a method for manufacturing thin-wall guard rings for large-sized high-speed motors. The method for manufacturing guard rings comprises the steps of refining billet steel and performing hot-forging billet manufacture, solid-solution heat treatment, cold deformation and rough machining, wherein the solid-solution heat treatment and the cold deformation comprise the following steps: a steel ingot after hot-forging molding is sent into a furnace, heated to be between 950 and 1,100 DEG C and thermally insulated to ensure that carbide is subjected to sufficient solid solution so as to obtain a uniform austenite structure; the austenite structure is rapidly subjected to water cooling till the austenite structure does not look red; and then the austenite structure is taken out from water and subjected to semihot-forging deformation. Due to the technical solution, the problem that the thin-wall guard rings for the large-sized high-speed motors are expensive in manufacturing material, complex in manufacturing method and high in manufacturing cost is completely solved, and the manufacture of the guard rings no longer needs special corollary equipment or expensive material. The manufacturing method has the advantages of effectively saving nickel resources and remarkably reducing cost for manufacturing the guard rings, along with simplicity and convenience. In addition, the guard rings manufactured by the method are high in plasticity and reliable in quality.

Description

technical field [0001] The invention relates to a thin-walled protective ring for a large high-speed motor, in particular to a method for manufacturing a thin-walled protective ring for a large high-speed motor. Background technique [0002] Large-diameter and thin-walled retaining rings are key parts of high-speed motors. Large high-speed motors use thin-walled guard rings to protect the guide bars at the end of the high-speed motor rotor, and the conductive end rings will not be thrown out due to the huge centrifugal force during high-speed operation. When the motor rotor rotates at high speed, stops and starts, it bears the alternating centrifugal force, bending stress and assembly stress, and the force is heavy and complicated. At the same time, it is necessary to prevent the loss of the end due to magnetic flux leakage from affecting the efficiency of the motor. Therefore, the protective ring is required to have High strength, high toughness, low magnetic properties, m...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of expensive manufacturing materials, complex manufacturing methods and high manufacturing cost of the above-mentioned thin-walled retaining ring for large-scale high-speed motors, and to provide a method for manufacturing thin-walled retaining rings for large-scale high-speed motors using domestic commonly used materials