A method for processing steam turbine regulating stage blades

Abstract

The invention discloses a regulating-stage blade processing method of a steam turbine, belonging to the field of machine manufacturing. The regulating-stage blade processing method comprises the following steps: 1, processing a blank; 2, carrying out linear cutting on roots of blades, and detecting; 3, carrying out finish-milling on the roots of blades, and processing and detecting centre holes; 4, carrying out rough machining on arc surfaces on blade tops and rivet head profiles; 5, carrying out finish machining on the arc surfaces on the blade tops and the rivet head profiles; 6, removing allowance of the parts of the blades; 7, carrying out finish machining on the parts of the blades; 8, carrying out linear cutting and polishing on steam passage profiles, so that control on the processing is strict, the processing procedures are perfect, the processing operation is simple, the difficult processing parts are integrated, key factors are controlled in an emphasis manner, and therefore, the quality of the product is effectively guaranteed, and the production efficiency is improved; through the processing technology, the processing quality of the product is effectively guaranteed, and the product consistency is guaranteed to be 95% or above; and through the processing technology, the strictness of process control is realized, and the quality stability and controllability during all the procedures are guaranteed.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a method for processing blades of a regulating stage of a steam turbine. Background technique [0002] The regulating stage impeller has the highest inlet steam temperature, maximum pressure and high steam velocity among all stages of the steam turbine, so the working condition of the regulating stage is worse than other pressure stages, and the working ability of the regulating stage is also very strong, so , From the appearance point of view, the regulating blade is designed to be very short and thick to adapt to its harsh working environment. Therefore, the processing of the regulating blade is also very difficult. The blade root of the regulating stage blade of the steam turbine is a double-single T-shaped structure with an included angle. Complex, many processing procedures, difficult processing, under the premise of ensuring product design requirements and assembly ...

AI Technical Summary

Problems solved by technology

The blade root of the regulating stage blade of the steam turbine is a double-single T-shaped structure with an included angle. Complex, many processing procedures, difficult processing, under the premise of ensuring product design requirements and assembly quality, how to make the processing process control tight, the processing process perfect, the processing operation simple, key elements controlled, effectively ensure product quality, improve production efficiency and other issues have become urgent technical problems to be solved

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