Static balance eccentric milling fine counterweight process method for pumped storage rotating wheel

Abstract

The invention discloses a static balance eccentric milling fine counterweight process method for a pumped storage rotating wheel. The method is that the de-weighting moment of the rotating wheel at the key position is equal to the unbalanced moment. The pumped storage rotating wheel has the characteristics of small size, high rotating speed and the like, and the counterweight difficulty of the pumped storage rotating wheel lies in that the counterweight of the small-size rotating wheel is difficult to meet the requirements for high precision and low residual unbalanced moment, so that the counterweight difficulty of the pumped storage rotating wheel is how to realize high-precision counterweight balance. The high-precision requirement of the counterweight can be met through eccentric milling counterweight, and the key step is that the eccentric milling contour size of the rotating wheel is accurately calculated according to the unbalanced moment and numerical control eccentric millingmachining is conducted. Compared with a drilling de-weighting method and a deviated turning de-weighting method which are adopted at present, the deviated milling counterweight method can overcome thedefect that drilling de-weighting affects the strength of the rotating wheel; and meanwhile, the defects of low deviated turning de-weighting precision and long machining period can be avoided. The method has the advantages of being easy to popularize, short in period, high in machining efficiency and high in balance weight precision.

Description

technical field [0001] The invention relates to a static balance counterweight method for a runner part in the mechanical field, in particular to a process method for static balance partial milling fine counterweight of a pumped storage runner of a water turbine. Background technique [0002] The runner is the core component of the water turbine, and it is ideal to minimize the vibration of the runner under high-speed rotation. The static balance of the runner is to balance the eccentric moment of the runner itself, so as to avoid the vibration caused by the eccentricity of the runner when it rotates. Therefore, the static balance of the runner plays a key role in the performance and life of the runner. Since there will still be a small part of the residual unbalanced moment after the runner is statically balanced, the residual unbalanced moment is used as a key indicator to measure the performance of the runner after statically balanced, that is, the lower the value of the...

AI Technical Summary

Problems solved by technology

[0003] At present, the static balance of the pumped storage runner adopts two methods of drilling to remove weight and offsetting the weight. The drilling and offsetting method has an impact on the strength of the runner; the offsetting method has low calculation accuracy and long processing time.

Moreover, the residual unbalanced moment index of these two counterweight methods cannot be lowered, and the counterweight accuracy is low

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