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Method for repairing wear and cracks of blade crown and sealing teeth of blade

A repair method and tooth sealing technology, which is applied in coating, metal material coating technology, etc., can solve the problems of reduced reliability of blades, shortened service life, and low pass rate, so as to reduce the amount of mechanical grinding and process The effect of stable quality and low dilution rate

Active Publication Date: 2020-02-21
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented describes different techniques for improving the durability or lifespan of gas turbines used in power generation systems. These improvements include improved coolant flow efficiency during operation due to better control over temperature and pressure levels, increased machine life span caused by decreased thermal stress concentration from traditional methods like water jackets, and enhanced material strength compared to current processes that rely heavily on plasma spray coating (PVC). Additionally, there have been reports showing that lasers may improve certain physical properties of these materials when applied directly onto them without requiring further machining steps. Overall, this technique allows for precise modifications while reducing costs associated with manufacturing operations.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the durability and lifespan of turbines' component parts while reducing their loss of effectiveness when exposed to gases such as airborne particles that may be present at different stages of flight time.

Method used

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  • Method for repairing wear and cracks of blade crown and sealing teeth of blade
  • Method for repairing wear and cracks of blade crown and sealing teeth of blade
  • Method for repairing wear and cracks of blade crown and sealing teeth of blade

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative import...

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Abstract

The invention discloses a method for repairing wear and cracks of a blade crown and sealing teeth of a blade. The wear of the blade crown and the sealing teeth of the turbine blade and the cracks of the blade crown and the sealing teeth are repaired by using a laser cladding technology, and then grinding machining is adopted, so that the external dimension of the blade is restored to the originaldesign geometric dimension form and technical index, and the blade can be used again. The laser cladding has the characteristic of rapid melting, a substructure of the laser cladding solidification structure is remarkably refined compared with a conventional as-cast structure, a fine and uniform alloy structure can be obtained, and the mechanical property of the turbine blade after laser claddingrepair is close to the forging standard.

Description

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Claims

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Application Information

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Owner AECC AVIATION POWER CO LTD
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