A Repairing Method for Damage of Precision Parts of Steam Turbine

A repair method and steam turbine technology, which are applied in the field of gas turbines and steam turbines, can solve problems such as endangering the safe operation of units and economic losses, and achieve the effects of low cost, high degree of automation and high welding precision.

Active Publication Date: 2017-11-10
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the continuous installation and operation of high-parameter large units, especially the large-scale use of large-scale steam turbines and gas turbines with a power of more than 600MW, the working conditions of thermal equipment components in power plants have become increasingly harsh. Parts in service, such as blades, rotors, cylinders, etc., change their dimensions due to wear, corrosion, water erosion, etc., resulting in large deviations between equipment operating parameters and design parameters, resulting in serious economic losses, and even endangering the safe operation of the unit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The repair system used in the repair method of the present invention consists of: a micro-arc plasma welding system equipped with a wire feeder, an ABB welding robot, a linkage turntable, a control power supply system, an optical three-dimensional scanning measurement device, and a computer system equipped with reverse engineering software.

[0026] When the defect of the blade matrix is ​​relatively serious, the repair process of the present invention is:

[0027] (1) Use an angle grinder to remove impurities such as oxides and dust on the surface of the blade to be repaired, grind the area to be repaired to eliminate defects, and use penetration testing until there is no display, that is, a gap is formed;

[0028] (2) Clamp the blade to be repaired on the turntable, use the optical three-dimensional measurement equipment installed on the robot, drive the robot and the turntable through the control system, and perform automatic optical three-dimensional scanning on the ...

Embodiment 2

[0034] The repair system used in the repair method of the present invention consists of: a micro-arc plasma welding system equipped with a powder feeder, an ABB welding robot, a linkage turntable, a control power supply system, an optical three-dimensional scanning measurement device, and a computer system with reverse engineering software.

[0035] When the surface of the blade is relatively shallow water erosion, the repair process of the present invention is:

[0036] (1) Use an angle grinder to remove impurities such as oxides and dust on the surface of the blade to be repaired, grind the area to be repaired to eliminate defects, and use penetration testing until there is no display, that is, a gap is formed;

[0037] (2) Clamp the blade to be repaired on the turntable, use manual optical 3D scanning, collect data through supporting computer software, and finally obtain 3D point cloud data on the surface of some areas near the blade gap;

[0038] (3) Use reverse engineerin...

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Abstract

The invention discloses a method for repairing the damage of the precision parts of the steam turbine, which adopts the micro-arc plasma welding repair technology of low heat input, small deformation and precise welding forming, and measures the original profile data of the precision parts of the steam turbine through optical three-dimensional scanning, thereby It can be used as a model for repairing and precise trimming of the precision parts of the steam turbine after welding, so as to realize the precise repair of the precision parts of the steam turbine. It has the advantages of high welding precision, complex parts repair, low cost, unlimited parts size requirements, simple equipment, small size, high degree of automation, and small size deviation of workpieces before and after repairing. The invention does not need to set out blades, and can still perform accurate repairs without a three-dimensional model of complex parts such as blades, and can be used for in-factory or on-site repairs.

Description

technical field [0001] The invention relates to a steam turbine and a gas turbine, in particular to a method for repairing the damage of the precision parts of the steam turbine. Background technique [0002] In recent years, with the continuous installation and operation of high-parameter large units, especially the large-scale use of large-scale steam turbines and gas turbines with a power of more than 600MW, the working conditions of thermal equipment components in power plants have become increasingly harsh. Parts in service, such as blades, rotors, cylinders, etc., change their dimensions due to wear, corrosion, water erosion, etc., resulting in large deviations between equipment operating parameters and design parameters, resulting in serious economic losses, and even endangering the safe operation of the unit. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned technical problems and provide a repair method for imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00
CPCB23P6/002
Inventor 黄岚郭洋陈兴东胡涛黄滔
Owner DONGFANG TURBINE CO LTD
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