Heat treatment process in the manufacturing process of oxidation-resistant stainless steel
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Hoist coupling rupture accident analysis
by：Waxing
2020-11-13
2019 - hoist coupling rupture accident analysis
01 -
27 a, the occurrence of the incident on February 23 o 'clock on the evening of December 5, hoist in after a load device coke, does not automatically upgrade, the operator found loose rope hoist wire rope phenomenon, now suspect that frequency converter fault caused power outages, but after inspection found that the inverter is not power, try to manually to ascend, continue to loose rope, wire rope running monitor timely report the relevant technical staff.
Technical personnel to the scene, to carefully check of frequency converter, did not find any problems, try to single motor running, found the north increase with the speed reducer, motor speed direction of motor in the electric motor is connected with the main speed reducer of the inner gear coupling damage, timely stop jiao, to replace of coupling, resumed production in 6 to 12 o 'clock in the morning.
Second, the event cause analysis (
A)
The inner gear coupling from start to now, has been used for more than two years, whether to use fixed number of year;
（
2)
Good lubrication situation whether in tooth, refueling pipe diameter comes coke in coke powder block for a long time, easy to fat, due to regular internal between tooth wear.
Three 1, clean up the oil filler, events, preventive measures, to ensure smooth to fat, and strengthen the tally;
2, south hoist motor within the same model with the main reducer gear coupling to schedule preventive maintenance time as soon as possible, disassemble or change, to ensure the safety of production;
3, inspect the elevator all coupling for grease lubrication condition.
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