Integrated shrink fit technology for multiple magnet yokes of hydro-generator rotor

Abstract

The invention discloses an integrated shrink fit technology for multiple magnet yokes of hydro-generator rotor. The technology includes a centering tool and a shrink fit technical method. The centering tool comprises a vertical lathe faceplate, a centering device, the magnet yokes, supporting limiting strips, a centering detector and a process screw rod. The shrink fit technical method includes the following steps that firstly, the first magnet yoke A is installed on the centering tool in an aligned mode; secondly, the second magnet yoke B and the third magnet yoke C are installed on the centering tool in an aligned mode; thirdly, the first magnet yoke A, second magnet yoke B and the third magnet yoke C are axially combined and fixed into a whole through the process screw rod and are rechecked; fourthly, the first magnet yoke A, second magnet yoke B and the third magnet yoke C are slowly and axially tightened through the process screw rod one by one; fifthly, a main shaft is sleeved with the combined magnet yokes to form a combined element, and the whole combined element is subjected to baking and shrink fit; sixthly, after shrink fit is conducted for a preset period of time, the combined element is taken out to be thoroughly cooled. The technology has the advantages that the work efficiency is high, the production cost is low, and the production period is short.

Description

technical field [0001] The invention relates to a multi-piece one-piece thermal sleeve process of a hydraulic generator rotor yoke block. Background technique [0002] At present, the rotors of the medium and small-capacity generator sets manufactured by our company mostly adopt the structure of yoke without bracket, and the yoke is generally composed of multiple yoke blocks connected in series. According to the capacity of the generating set, the number of rotor yoke blocks for a single hydro-generator ranges from 2 to 7. For a long time, out of comprehensive consideration of the reliability and safety of the yoke block thermal sleeve process, our company's hydraulic generator rotor has no bracket structure yoke block thermal sleeves have adopted the insertion method thermal sleeve (that is, the main shaft is inserted into the yoke block method), the way of single-piece baking and heat-fitting of yoke blocks, the oven only bakes one yoke at a time, and after heat-fitting a...

AI Technical Summary

Problems solved by technology

Therefore, at present, the company’s yoke block thermal sleeve method has the problems of low baking and thermal sleeve efficiency, high baking cost, and long thermal sleeve cycle.

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