A process method for static balance partial milling precision counterweight of pumped storage runner

Abstract

The invention discloses a process method for static balance partial milling precision counterweight of a pumped storage energy runner. The method is that the degravity moment of the runner at the key position is equal to the unbalanced moment. The pump-storage runner has the characteristics of small size and high speed. The difficulty of counterweight is that the counterweight of the small-volume runner is difficult to meet the requirements of high precision and low residual unbalanced moment. heavy difficulty. The high-precision requirements of the counterweight can be achieved through the offset milling counterweight. The key step is to accurately calculate the offset milling contour size of the runner according to the unbalanced torque and perform CNC offset milling. Compared with the currently used methods of drilling and off-center weight removal, the off-center milling and counterweight method can avoid the disadvantages of drilling and weight removal that affect the strength of the runner; it can also avoid the disadvantages of low precision and long processing cycle for off-center weight removal. The invention has the characteristics of easy popularization, short period, high processing efficiency and high counterweight 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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