Overhead crane knowledge – Richard Phillips, mechanical engineer, CP&A
A gearbox input shaft failed because the alignment between the motor and gearbox couldn’t be maintained under load. Although this was a torque arm arrangement, this had a similar effect as a ‘soft foot’, which can be likened to sitting on a chair, and it rocks back and forth because the feet aren’t even. This can cause misalignment and vibration, which is a major cause of fatigue and early wear problems for powertrain equipment.
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This was caused by poor rail alignment. The rail gauge increased too much at... -
Richard Phillips. -
The trolley wheel flange started grinding against a rail and wearing. This... -
A gearbox input shaft failed because the alignment between the motor and... -
A gear mesh was not properly aligned. This caused uneven loading of the teeth... -
Limit switch and trigger alignment is crucial for proper function of the crane.
