Machining process for low-pressure first-stage stationary blades of gas turbines

Abstract

The invention discloses a machining process for low-pressure first-stage stationary blades of gas turbines, which belongs to the technical field of blade machining. The machining process for low-pressure first-stage stationary blades of gas turbines includes: step 1: a Z-shaped blade blank is formed by wire cutting; step 2: auxiliary heads are respectively welded on the inner and outer rings of the blade; step 3: rough machining is carried out; step 4: semifinishing is carried out; step 5: four times of finish machining are carried out on the air passage part, and finish machining is carried out on the radial face of the blade; step 6: the wire cutting method is adopted to remove the auxiliary heads of the outer and inner rings, and the inner ring surface, the outer ring surface and the inner radial surface of the blade are then machined. Under the premise of guaranteeing product design requirements and assembly quality, the machining process for low-pressure first-stage stationary blades of gas turbines strive for strict process control, a complete machining process, simple machining operation, integrated difficult point machining and critical control on key factors, thus effectively guaranteeing the quality of products and increasing the production efficiency.

Description

technical field [0001] The invention relates, in particular, to a blade processing technology, in particular to a gas turbine low-pressure first-stage stationary blade processing technology, and belongs to the technical field of blade processing technology. Background technique [0002] With its advantages of high thermal efficiency, good peak-shaving performance, short construction period, and low investment, gas turbines have become one of the main forms of power generation in developed countries. my country also regards gas turbines as a key breakthrough point for new energy. Both the blade root and the blade crown of the low-pressure first-stage stationary blade of the gas turbine belong to the "Z"-shaped assembly crown. The structure of gas turbine blades is complex, and the requirements for dimensional accuracy and assembly clearance are higher than those of steam turbine blades. On the premise of ensuring product design requirements and assembly quality, how to make t...

AI Technical Summary

Problems solved by technology

Both the blade root and the blade crown of the low-pressure first-stage stationary blade of the gas turbine belong to the "Z"-shaped assembly crown. The structure of gas turbine blades is complex, and the requirements for dimensional accuracy and assembly clearance are higher than those of steam turbine blades. On the premise of ensuring product design requirements and assembly quality, how to make the processing process control tight, the processing process perfect, and the processing operation simple, the key elements Focus on control, effectively ensure product quality, improve production efficiency and other issues have become technical problems to be solved