shaft misalignment on electric motor
shaft misalignment on electric motor
(OP)
shaft misalignment on transmiting power cause energy loss beside of premature demage on machine parts.
shaft misalignment cause bad friction in transmiting system such as flexible coupling.
this phenomena cause relative motion between driving shaft and driven shaft and reduce the rotational speed (rpm).
Power(P) = T.n......
in this case is just speed reduction only,..? how about torque,..?
can u give me explanation or reference to solve this problem,..?
thanks,....
shaft misalignment cause bad friction in transmiting system such as flexible coupling.
this phenomena cause relative motion between driving shaft and driven shaft and reduce the rotational speed (rpm).
Power(P) = T.n......
in this case is just speed reduction only,..? how about torque,..?
can u give me explanation or reference to solve this problem,..?
thanks,....





RE: shaft misalignment on electric motor
One detailed review of effects of coupling misalignment are at:
http://www.ulb.ac.be/polytech/laborulb/
RE: shaft misalignment on electric motor
RE: shaft misalignment on electric motor
The increase in power is very small if detectable at all.
Some more discussion at:
http://www.reliability-magazine.com/ubb2000/ubb/Forum2/HTML/000422.html
RE: shaft misalignment on electric motor
1. Noticeable vibrations as posted above
2. Motor - Load set structural damages. Consequently, this may affect the motor speed way down to the motor stalling and ultimately the motor protective devices trip.
3. Noticeably increased friction, and temperature.
The above depends on a type of coupling being used. There are types of couplings specifically built to allow the motor - load angular misalignments.
RE: shaft misalignment on electric motor
Here is my point:
Vibration and reaction forces are the primary mechanicsm by which misalignment impacts on motor reliability. Only in very extreme circumstances would electrical loading changes from misalignment cause any significantly impact on motor reliability.
That major effect of vibration and forces should be understood/acknowledged before proceeding to a discussion of the minor effects of loading.
RE: shaft misalignment on electric motor
http://www.maintenanceresources.com/ReferenceLibrary/Alignment/WhyShaft.htm
for a shaft distortion, etc.
http://www.maintenanceresources.com/ReferenceLibrary/Alignment/Importance.htm
for the shaft misalignment examples.
http://www.textronpt.com/institute/courses/mmodule4.htm
for a failure to start.
http://www.yachtsurvey.com/alignment.htm
for an entire drive system being damaged.
http://web.utk.edu/~hines/publications.html
for several papers on the motor shaft misalignment.
etc. for more info