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

A processing technology and gas turbine technology, applied in the field of blade processing technology, can solve the problems of many processing procedures, complex gas turbine blade structure, and high processing difficulty.

Active Publication Date: 2013-04-10
SICHUAN MIANZHU XINKUN MACHINERY MAKING
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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 ensu

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Embodiment Construction

[0034] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0035] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0036] Gas turbine low-pressure first-stage stator blade processing technology of the present invention: comprises the following steps:

[0037] Step 1. Carry out wire cutting on the outline of the ring forging blank, and make the "Z" shape of the blade blank under wire cutting, so that the machining allowance is 3-4mm (can be 3 or 4 or choose from 3-4mm);

[0038] Step 2. Weld the process head on the inner ring and outer ring of the blade respectively, then mill the back plane, intake side and end f...

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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...

Claims

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Application Information

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IPC IPC(8): B23P15/02
Inventor 郑成旭谢泽波袁晓阳宁福贵罗兵陈小亮
Owner SICHUAN MIANZHU XINKUN MACHINERY MAKING
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