Running vertical motor in horizontal position
Running vertical motor in horizontal position
(OP)
We have a recently repaired motor (3300 V, 360 kW, 1000 rpm, vertical sq. cage induction motor). Is it safe to take no load test run of the motor, keeping it in horizontal position? This is required since we do not have the right jig / fixture to mount the motor in our workshop in vertical position.





RE: Running vertical motor in horizontal position
RE: Running vertical motor in horizontal position
Is there an upper thrust bearing? If so it may skid when you run the motor on it's side.
RE: Running vertical motor in horizontal position
RE: Running vertical motor in horizontal position
RE: Running vertical motor in horizontal position
RE: Running vertical motor in horizontal position
You should disassembly the motor and replace the thrust bearing (if several, one will be replaced) with an equivalent size deep groove ball bearing, this will provide radial stability to the rotor-shaft assembly during the test while the motor is horizontal. Some motors have back to back angular contact bearings on the thrust side, if so you are lucky and the motor will run horizontally with no problem. After test, the original assembly must be restored. Be careful handling bearings since them deteriorate easily.
This is expensive but other way the rotor will rub against the stator with possible permanent damage to the windings and core lamination.
RE: Running vertical motor in horizontal position
Thanks one and all of you for giving your valuable suggestions.
RE: Running vertical motor in horizontal position