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Red Star Machine: what about the abrasion of ball mill sliding bearing bush burning

Red Star Machine: what about the abrasion of ball mill sliding bearing

China Construction Machinery Information

like other equipment, ball mills will inevitably have various failures during operation, or due to human operation factors, or equipment running wear and tear. Red Star Machine believes that in the face of equipment failure, the first thing to do is how to solve the problem

it is not common for the ball mill to burn the sliding bearing. However, if we try to wear it to a certain thickness during the whole testing process, and the bearing liner and spherical body cannot be well combined, the equipment will be scratched. A simple theoretical explanation may not let you have a good understanding. Let's take the abrasion of the sliding bearing bush of a ball mill in a concentrator as an example to explain

During a normal operation of the clinker ball mill in the plant, the feed hollow shaft suddenly heated, and the temperature was very high, up to more than 200 degrees. Part of the surface of the hollow shaft turned blue. The emergency shutdown inspection found that there were many Babbitt alloys at the spherical tile mouth, and it was preliminarily judged that the tile surface was melted by high temperature. Under the action of friction and pressure, it is brought out of the tile mouth by data processing

through physical examination, it is found that there are many scratches on the surface of the alloy tile lining. The middle scratch is very deep, but the bottom of the scratch and the spherical body are about two-thirds thick. According to experts' analysis, this problem occurred in the ball mill because the temperature of the clinker entering the hollow shaft was too high, and the temperature of the outer surface of the corresponding hollow shaft was very high, which diluted the viscosity of the lubricating oil and did not form an oil film. The shaft was in direct contact with the bearing liner to generate heat. The temperature rose sharply, melting the surface of the bearing liner and causing scratches

in the face of this situation, we usually have two methods to solve it. First, replace the spherical tile directly, which is the simplest and most direct solution; Second, repair the damaged tile lining. During production, we often encounter such problems: the workshop is in a tense and orderly operation, when a certain equipment suddenly breaks down, but the order is about to be delivered, and the production task is tight, but the quantity is not too large to make the oil flow back to the oil tank from the main oil cylinder of the oil pump through the oil return valve, and there are no spare parts at this time. This is also a problem often encountered by manufacturers. At this time, we need to repair the equipment in time so that the order can be delivered within the scheduled time

now let's get down to business and talk about how to repair the damaged tile lining. Xiuwang Jinghai introduced that repairing the damaged tile lining requires experienced technicians to file and polish the scratches to make them smooth. On the undamaged surface, scrape out regular micro oil grooves, repair the tile mouth (i.e. oil inlet), then empty the grinding body and clinker in the ball mill, and manually rotate the grinding body to grind the tile lining without load. After reaching a certain degree, it shall be linked with the transmission part for no-load test run. After a few hours, it shall be loaded with grinding body and clinker for on-load operation. It can continue to be used after observing that everything is normal

after the above conditions occur to the equipment, even if it can be used normally after repair, the Red Star machine should remind the user to replace the new spherical tile in time, because after the equipment has problems, the temporary repair cannot be used for too long. Replace the new spherical tile in time to ensure the smooth progress of your next production operation

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