Technical method for repairing damage on axle neck of rotor of turbo generator through pile up welding in element of arc

The technology of a steam turbine generator and a process method is applied in the field of mechanical equipment repair, and can solve the problems of lack of permanent coating, little influence on shaft strength, large workload, etc., and achieves small residual stress, small repair workload, and repair low cost effect

Inactive Publication Date: 2007-02-21
黄有光 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small journal turning affects the strength of the shaft, and the workload is large, the cycle is long, and the cost is high; the brush plating repair is affected by the bonding strength of the brush coating, the strength of the brush coating itself, and stress factors, etc., and the permanent coating with ideal effect cannot be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] An example is given below to describe in detail.

[0007] Micro-arc surfacing welding repair process method for turbogenerator rotor journal damage: ①, Surface pre-treatment: Use acetone to clean the oil on the stretched and bruised turbogenerator rotor journal, and then use a needle file to clean it Repair the parts that are not easy to be repaired by welding; ② Micro-arc surfacing welding: use the self-fusing electrode electric spark deposition surfacing equipment to repair the defect grooves and welds of the turbogenerator rotor shaft journal with the self-fusing electrode welding wire micro-arc cladding welding In the pit; when the surface of the welding repair is rough, use a file to file and repair, and then continue micro-arc surfacing to a sufficient height; ③, Rough grinding: use a file to roughly grind the micro-arc surfacing of the journal 0.03 mm higher than the standard size of the journal; continue to add surfacing welding to the part that is not filled un...

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PUM

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Abstract

A microarc build-up welding technology for repairing the damage on rotor's axle neck of electric turbogenerator includes such steps as removing oily dirt, trimming the damaged position, microarc build-up welding with consumable electrode, primary grinding, fine grinding, and polishing.

Description

technical field [0001] The invention belongs to the repair technology of mechanical equipment, and mainly relates to a micro-arc surfacing repair method for the damage of the rotor journal of a steam turbine generator. Background technique [0002] The steam turbine rotor and the motor rotor are the key components of the turbogenerator set, and the quality of the rotor is an important factor directly affecting the operation of the unit. Due to various reasons such as manufacturing, processing, transportation and power plant operation, accidents such as straining and bruising of rotor journals often occur. The damage defects of the journal affect the uniformity of the oil film and the vibration performance of the unit during operation, and serious defects also affect the strength of the rotor. Local strain causes stress concentration, which brings serious harm to the safe operation of the unit. The traditional repair method for eliminating defects is mainly to make the jour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
Inventor 黄有光王春光
Owner 黄有光
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