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

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...

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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.