The Causes and Effects of the Keys Missed in the Main Hoist Gear Reducer on the Ladle Cranes
(Room 311)
06 May 19
4:00 PM
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4:30 PM
This paper introduces a special failure case of a main hoist reducer on ladle cranes. A maintenance force noticed the abnormal signs of bearings. During the maintenance, it was found that keys in the main hoist gear reducer were either displaced or missing and staggers between keyseats and keyways. After repair, the causes of displaced or missing keys were discussed and verified. Finite element modeling was utilized to analyze the interference of gears and shafts to explain why keyseats and keyways staggered, which showed an inappropriate fit of design in general. Finally, suggestions for improvement and repair are provided.