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Ball mill main bearing bush repair process

A main bearing and ball mill technology is applied in the field of repairing technology of the main bearing bush of a ball mill, which can solve the problems of leakage of the back of the pad, high cost, long cycle, etc., and achieve the effect of saving money and ensuring quality requirements.

Inactive Publication Date: 2014-05-07
LUOYANG JIAWEI BEARING MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, after many years of use, the bearing bush of the main bearing is easy to wear, and part of the shoe bottom may leak out of the back of the shoe. Therefore, the bearing bush must be recast
In the past, it was necessary to go to the original manufacturer to cast Babbitt alloy to repair the bearing bush, which not only cost a lot, but also took a long period, which seriously affected the production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] 1. Cleaning.

[0030] (1) Alloy removal: Bake the back of the tile with a blowtorch to make the alloy fall off, then remove the remaining alloy with a wire brush or scraper, and wipe it with a rag.

[0031] (2) Clean the bearing bush: the scale and dirt on the bearing bush can be removed by sandpaper, wire brush or sandblasting; when the bearing bush is oily, put the bearing bush in a pot and heat it to 300-350°C, and use a hemp brush to reconcile Scrub with zinc chloride solution, or put the bearing bush in hot alkaline water at 80-100°C for 10-12 minutes, then put it in water at 80-100°C for 4-5 minutes to remove alkali, then put it in cold water to rinse and dry . The composition of alkaline water used is 10% NaOH aqueous solution or 10%-30% NaHCO 3 Aqueous solution; check whether there is any oxide on the inner surface of the tile back. The surface without oxide should be silver gray. If there are golden or brown oxidation spots, it should be pickled with 30% hydr...

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PUM

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Abstract

Bearing bushes of main bearings of ball mills can be abraded easily after years of usage, and bush backs might expose from parts of bush bottoms, so that bearing bushes must be cast again; babbitt metal is required to be cast in original manufacturers in prior bearing bush repair, and accordingly, the cost is high, the period is long, and the production is affected seriously. The repair process comprises five steps of cleaning, tinning, casing, quality inspection and scraping to complete repair of the damaged bearing bushes. Performances of the bearing bushes repaired through the repair process can all reach requirements, and more than 30 thousand yuan of repair costs can be saved for enterprises.

Description

technical field [0001] The invention relates to the field of bearing maintenance, in particular to a repair process for the main bearing bush of a ball mill. Background technique [0002] Grinding operation is not only used in mineral processing industry, but also widely used in industrial sectors such as construction, chemical and electric power. Grinding machines can be divided into ball mills, rod mills, pebble mills and autogenous mills according to different crushing media. The ball mill is composed of cylinder body, ore feeding part, ore discharging part, bearing part, transmission part and lubrication system, etc. The bearing part is composed of the lower bearing seat, the bearing cover, the lower bearing bush with Babbitt alloy cast on the surface, and cylindrical pins. [0003] However, after many years of use, the bearing pad of the main bearing is easy to wear, and some of the pad bottom may leak out of the pad back, so the bearing pad must be recast. In the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 杨伟殷毓庚
Owner LUOYANG JIAWEI BEARING MFG
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