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Short-circuit processing method for stator core of steam turbine generator

A steam turbine generator and stator iron core technology, which is applied in the manufacture of motor generators, stator/rotor bodies, electrical components, etc. The effect of shortening the maintenance period, reducing the cost, and wide application

Inactive Publication Date: 2018-04-03
CLP CHINA NUCLEAR POWER ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The technical reserve ability to deal with the failure of the stator core of the turbogenerator is also relatively lacking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] A method for treating a short circuit of a stator core of a turbogenerator, the specific steps are as follows:

[0029] 1. For the cutting and grinding of the damaged part of the stator core, first cut the welded silicon steel sheet with a flat pointed chisel, scraper, small grinding wheel (including various special-shaped grinding wheels), drill bits, milling cutters and other tools, which will be melted by the arc The welded silicon steel sheet and the iron core whose insulation is damaged are all removed until the iron core is well insulated;

[0030] 2. Remove edges, corners and burrs with tools such as small grinding wheels, wind mills, etc., until all surfaces are polished flat, and the texture between the iron core silicon steel sheets is clearly visible, and clean it with a vacuum cleaner while grinding;

[0031] 3. Use a white cloth dipped in alcohol to scrub repeatedly, and brush a layer of insulating paint. Use a white cloth dipped in alcohol to repeatedly wi...

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PUM

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Abstract

The invention relates to a short-circuit processing method for a stator iron core of a steam turbine generator. The texture is clearly visible, clean it with a vacuum cleaner while grinding; 3) Repeatedly scrub the polished surfaces with a white cloth dipped in alcohol; 4) Carry out the generator iron loss test to determine whether the quality of the short-circuit iron core is qualified, if so, go to step 6) , otherwise go to step 5); 5) Take out the upper layer bar at the fault point, carry out iron core processing, and return to step 4); 6) Determine whether the area of ​​the stator core welding exceeds the set threshold, if so, Make a fake iron core, insert the fake iron core into the iron core pit and fix it, otherwise fill it with insulating material and shape it. Compared with the prior art, the present invention has the advantages of wide application range, safety and reliability, and high maintenance efficiency.

Description

technical field [0001] The invention relates to a steam turbine generator, in particular to a short circuit treatment method for a stator iron core of a steam turbine generator. Background technique [0002] The stator core of the turbogenerator is one of the important parts of the generator, and it is usually made of laminated fan-shaped silicon steel sheets with a thickness of 0.35mm or 0.5mm. The fan-shaped piece is manufactured by punching and shearing a roll or a single silicon steel sheet, and then undergoes strict deburring and double-sided coating of high-resistance insulating varnish. It is one of the prerequisites for the normal operation of the generator to maintain good insulation performance between the core laminations. If the insulation between the laminates is damaged, it will cause a short circuit between the silicon steel sheets. When a short circuit occurs between the silicon steel sheets, a closed current loop is formed between the silicon steel sheets ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/02
CPCH02K15/02H02K15/0006
Inventor 赵斌蒋建军赵明智
Owner CLP CHINA NUCLEAR POWER ENG TECH
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