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A spraying repair method for aero-engine wear and tension pipe

An aero-engine and repair method technology, applied in the field of parts repair, can solve problems such as engine bearing noise, achieve the effects of prolonging service life, low production cost, and reducing wear

Active Publication Date: 2017-10-27
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The invention provides a spraying repair method for the wear and tear of the tension tube of an aero-engine, which solves the problem of engine bearing noise caused by wear and tear of the tension tube, prolongs the service life of the tension tube and reduces the repair cost of parts

Method used

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Effect test

Embodiment Construction

[0015] An aero-engine wear and tension pipe, the repair process is: inspection of incoming parts → degreasing with acetone → appearance inspection → dry sand blasting → cleaning → fixture protection → clamping → preheating → fixture rotation → explosive spraying WC-25Co bottom layer → Explosive spraying of Ni-Cr-Al alloy surface layer → cooling → inspection → coating grinding process → visual inspection.

[0016] The dry blasting treatment before detonation spraying is to clean and activate the surface of the alloy matrix of tension pipe parts, so as to improve the bonding strength between the WC-25Co bottom layer and the alloy matrix.

[0017] The technological parameters of detonation spraying WC-25Co cermet coating are: oxygen-fuel ratio 1.28, powder feeding nitrogen flow rate 35, spraying distance 185mm, coating thickness 0.06-0.08mm, average HV5 hardness 625.

[0018] The particle size of the powder used for detonation spraying Ni-Cr-Al alloy coating is 13-45 μm, the spra...

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Abstract

The invention relates to a part repair method, in particular to a spraying repair method for an abraded tensioning tube of an aero-engine. According to the technical scheme, the method comprises the steps that firstly, a WC-25Co metal ceramic coating is sprayed on the abraded tensioning tube in a detonation mode to form a bottom layer for protecting a substrate, and then a Ni-Cr-Al alloy coating is sprayed on the bottom layer in a detonation mode to form a surface layer for repairing the size. According to the spraying repair method for the abraded tensioning tube of the aero-engine, the problem of noise of an engine bearing caused by abrasion of the tensioning tube is solved, the service life of the tensioning tube is prolonged, and the repair cost of the part is reduced.

Description

technical field [0001] The invention relates to a method for repairing parts, in particular to a method for repairing aero-engine wear and tension pipes by spraying. Background technique [0002] Bearing noise is one of the main faults of the engine, and the cooperation of the low-pressure connectors (tension tube, low-pressure large nut, spline tube) has a significant impact on it. Due to the need to connect the low scroll shaft and low pressure shaft of the engine, there is a small non-concentricity value in the tension pipe after assembly, that is, it is inclined along the axial direction of the engine, and it swings with the rotation of the rotor when the engine is working, making the tension The contact part of the tube and the transmission shaft is very easy to be worn, resulting in irregular contact and collision of the two mating parts, causing abnormal engine noise, so it is necessary to carry out dimensional repair on the worn tension tube. [0003] Commonly used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/126C23C4/073C23C4/06
CPCC23C4/06
Inventor 王博袁福河王璐张春刚程玉贤
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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