The damage to the equipment after an abnormal expansion sleeve

XINLANCouplingAnalysis When the bucket wheel body and the bucket wheel shaft rotate relatively, because the expansion sleeve strength and wear resistance are higher than the bucket wheel body and the bucket wheel shaft, the bucket wheel body shaft hole, especially the bucket wheel shaft, will be damaged under the action of strong torque. In severe cases, the bucket wheel shaft will be scrapped, causing the bucket wheel to be unable to take coal, which will seriously affect the coal loading of the coal conveying system.
According to the data, a DQ800/1200 .30 type bucket wheel machine in a power plant has been put into operation for several times within one year. Coupling.

　　当斗轮体与斗轮轴发生相对转动时,斗轮体对胀套产生碾压作用会使胀套与斗轮体或斗轮轴发生粘连,导致其拆卸难度远远大于装配难度;而在拆卸与装配过程中,还需动用10T以上升高8米以上的起重机.即便备品配件齐全,抢修时间也在48小时以上(内容主要有:修复斗轮轴、修复斗轮体轴孔、更换胀套等);而如果斗轮轴报废,则须对其更换,一般加工斗轮轴时间在20天~30天,甚至更长.

　　In the event of the above accident, the emergency bucket turbine operation should be put into operation, and relevant personnel should be organized to carry out emergency repairs to the equipment in the accident.

　　When there is a coal ship at the coal unloading terminal

　　After turning the bucket wheel arm to a certain angle, cut off the power of the relevant system and disassemble the bucket wheel system for emergency repair; the emergency repair plan and sequence can be carried out in accordance with the relevant parts in the maintenance document package. In order not to affect the operation of the generator, the bucket wheel can be divided into the block The board is pushed to the upper end of the coal, and the terminal is notified to maintain the unloading volume at 800T/h~900T/h, thereby extending the unloading time.

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