A laser repair method for heavy-duty gas turbine hub mortise teeth

A technology of laser repair, hub and tenon teeth, applied in combustion methods, combustion chambers, combustion equipment, etc.

Active Publication Date: 2019-11-12
沈阳大陆激光工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, research and development of a laser cladding repair method for heavy-duty gas turbine hub mortise teeth is a major topic in the technical field. After searching and checking by the applicant: there is no relevant report in this regard at home and abroad.

Method used

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  • A laser repair method for heavy-duty gas turbine hub mortise teeth

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Embodiment 1

[0050] The No. 1 gas turbine unit of a gas turbine power plant had a major accident in which the rotor blades were broken and the hub was scrapped due to the large wear of the tenon teeth of the hub and the rotor blades, causing economic losses of more than 50 million yuan to the factory. In the same year, Unit 4 also found the same problem as Unit 1. The factory consulted the original manufacturer, and the reply was that the wheel hub could not be repaired and had to be scrapped and replaced. The cost of replacing the new wheel hub was 30 million yuan, and the manufacturing period was 6 months.

[0051] The wheel hub of No. 4 machine can no longer be used normally, and the wheel hub must be replaced with a new one or repaired. Finally, it was decided to use laser cladding technology to remanufacture the wheel hub of No. 4 machine. Its characteristics and technological process mainly include the following steps.

[0052] 1 damage detection.

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Abstract

The invention discloses a laser repair method for a hub tenon tooth of a heavy-duty gas turbine. The laser repair method comprises the following steps: 1, detecting damage situations; 2, determining maintenance contents; 3, formulating a process scheme; 4, pre-treating a damaged part, detecting a tongue-and-groove damage surface, and determining the maintenance process sequence; 5, protecting a non-laser cladding surface; 6, performing laser cladding processing; and 7, performing examination after repair. The process parameters of laser cladding and the ratio of all element ingredients in a powder material are optimally designed to clad crack-free and impurity-free compactly-textured wear-resistant alloy powder in the hub tenon tooth tongue-and-groove of the heavy-duty gas turbine, so that the service life of the heavy-duty gas turbine is prolonged.

Description

technical field [0001] The invention relates to a repair method for heavy-duty gas turbine components, in particular to a laser repair method for heavy-duty gas turbine wheel hub mortise teeth. Background technique [0002] Due to the short construction period and environmentally friendly power generation operation, the heavy-duty ground gas turbine can independently and quickly start, and undertake the peak-shaving operation and black-start functions of the power grid. Although my country is poor in oil and gas, there are still nearly 100 oil and gas heavy-duty ground gas turbines in my country. [0003] There are three large and three small enterprises in my country that specialize in the production of coal-fired generator sets, but there are no enterprises in my country that specialize in the production of heavy-duty ground gas turbines for fuel and gas. At present, all the fuel and gas heavy-duty ground gas turbine equipment used are imported, and the annual equipment m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/05C22C30/00
CPCC22C19/055C22C30/00C23C24/103F23R2900/00019
Inventor 朴新欣陈江董思远
Owner 沈阳大陆激光工程技术有限公司
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