broken or cracked shaft
broken or cracked shaft
(OP)
hello all what spectra would you expect to get if a dc drive motor had a broken or cracked shaft regards mike cooney
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RE: broken or cracked shaft
Goodbye
Michele
RE: broken or cracked shaft
if you want to see the spectra just let me know.
thanks for your reply
RE: broken or cracked shaft
http://www.bently.com/articles/articlepdf/186dbcorner.pdf
http://www.bently.com/articles/articlepdf/186anatomy.pdf
http://www.iitg.ernet.in/engfac/rtiwari/nsrd-2003/keynote_abstract_sekhar.pdf
Regards,
Dave G.
www.reliabilitydirect.com
RE: broken or cracked shaft
"First rule of cracks" per Bently Nevada: "If a shaft is cracked, it almost certainly is bowed." If you can get a dial gage on the inboard end of the motor, check for excessive radial runout. A crack usually shows up as 1X vibration, sometimes 2X. I suspect you have some sort of looseness (commutator or bearings?) based on your description of the spectral plots.
kenge.