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Online shaft neck repairing method

A repair method and journal technology, applied in the field of journal repair, can solve the problems of large production impact, large workload, and high cost, and achieve the effects of reducing difficulty, ensuring production, and good matching accuracy

Active Publication Date: 2014-07-16
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing domestic journal repair technology is usually off-line repair, that is, after off-line, spraying, sputtering or surfacing and other methods are used before machining. The same workload is large, the cycle is long, and the cost is high, which has a great impact on production.

Method used

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  • Online shaft neck repairing method
  • Online shaft neck repairing method
  • Online shaft neck repairing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Such as Figure 1 to Figure 8 As shown, the journal online repair method in this embodiment includes:

[0030] The first step is to open the upper box cover 8 of the bearing seat, cut off the damaged original bearing, and expose the journal worn by the bearing; roughly grind the worn journal 1, so that the journal diameter is 0.20-0.40mm smaller than the standard journal diameter; Four protruding welding bars 5 are welded symmetrically along the axial direction at the grinding place of the journal, the width of the welding bars 5 is 2-5mm, and there is a gap between adjacent welding bars 5; the welding bars 5 are finished, so that the welding bars 5 The runout of the outer surface relative to the axis is less than 0.03mm, and the error of the shortest distance between the outer surfaces of the symmetrical weld bars 5 is less than 0.03mm.

[0031] Among them, use a cutting tool to cut off the damaged bearing; when rough grinding, use the end cover with a semi-circular h...

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Abstract

The invention relates to an online shaft neck repairing method. The online shaft neck repairing method includes: grinding a worn shaft neck coarsely; welding weld ribs; finishing the weld ribs; machining a bush; mounting the bush and replacing a bearing sequentially on the shaft neck provided with the weld ribs and completing repairing after post processing. By the method, the shaft neck at the cooperative positions of two ends of a shaft and the inner ring of the bearing can be repaired online, repairing time and cost can be favorably saved, and production can be ensured to run smoothly.

Description

technical field [0001] The invention relates to an online repair method for journals, which is suitable for online repair of journals of various large-scale fans, pulverizers, etc., and is especially suitable for journal repairs in continuous production enterprises that cannot be shut down for a long time due to special process requirements. Background technique [0002] According to the applicant's knowledge, iron and steel raw material plants, coking plants and other units have various large-scale crushers and dust removal fan equipment. After the bearings are burned for some reason, severe friction may occur between the inner ring of the bearing and the journal, resulting in serious damage to the journal. [0003] For crusher equipment, it is necessary to take out the shaft and dismantle all the hammers, and then send it to the repair unit for electric welding and welding repair on the shaft journal before machining, and then reinstalling. The workload is heavy, the cycle ...

Claims

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Application Information

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IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 贾方俊孙建福
Owner NANJING MEISHAN METALLURGY DEV
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