Power-saving apparatus for hydraulic expanding large retaining-ring by using super high pressure system

Abstract

A labor-saving unit for manufacturing the large protecting ring by hydraulic expanding with ultrahigh-pressure system features that the upper and lower hollow conic punch heads, whose internal hole is matched with a labor-saving guide column in slide mode, are arranged at upper and lower positions relative to a protecting ring blank, at least two labor-saving units are arranged between the bench of ordinary press and movable transverse beam, the labor-saving guide sleeve whose inside and outside are communicated with the ultrahigh-pressure liquid channel is additionally used for said labor-saving guide column, and an ultrahigh-pressure system is used for boosting.

Description

technical field [0001] The invention relates to a bulging device for ring-shaped workpieces, in particular to a labor-saving device for hydraulic bulging strengthening of generator retaining rings. Background technique [0002] The retaining ring is a non-magnetic steel ring installed at both ends of the generator rotor, which is used to tighten the coil at the end. The force is complex, the working conditions are special, and the manufacturing is difficult. It is one of the key parts of the power generation equipment. In order to ensure the safe operation of the generator, it is required that the non-magnetic retaining ring should have sufficient strength, good toughness, and minimum residual stress, so the manufacturing technology is very demanding. Among them, performance enhancement is the key to production. In terms of performance enhancement, hydraulic bulging is the most ideal in the prior art. The methods of hydraulic bulging strengthening include total pressure me...

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