PD pump Shaft bend what could be the causes ?
PD pump Shaft bend what could be the causes ?
(OP)
I received a complaint of new oumo supplied that it shaft bend and This application is pumping light oil, I would like to kbow what caused the pump's shaft to bend ?
And woul that be possible
To straighten the pump's shaft and would That be an issue of lower flow than normap after repairing.
And woul that be possible
To straighten the pump's shaft and would That be an issue of lower flow than normap after repairing.





RE: PD pump Shaft bend what could be the causes ?
A machinist might be able to straighten it to within the coupling's misalignment range.
That operation, and any remaining imbalance, will probably shorten the bearing life.
None of that should affect the flow.
Mike Halloran
Pembroke Pines, FL, USA
RE: PD pump Shaft bend what could be the causes ?
RE: PD pump Shaft bend what could be the causes ?
Shop may be able to straighten with heat applied inside the bow. I'd look for a shop I trust and ask them whether they think they can do it successfully on this shaft
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(2B)+(2B)' ?
RE: PD pump Shaft bend what could be the causes ?
Gear?
Twin Screw?
Three Screw?
Reciprocating?
Sliding Vane?
Double Lobe?
If the pump performed well on the test stand, but the customer is complaining about a bent shaft, I would expect that the customer closed a valve on the discharge of the pump causing very, very high pump shaft torque or a high moment on the shaft. Quite often, operators do not understand how these pumps truly operate.
RE: PD pump Shaft bend what could be the causes ?
RE: PD pump Shaft bend what could be the causes ?
Another possibility to consider would be unusual heating of shaft during operation.
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(2B)+(2B)' ?
RE: PD pump Shaft bend what could be the causes ?
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(2B)+(2B)' ?
RE: PD pump Shaft bend what could be the causes ?
Or did I misunderstand something from your other related discussion?
Mike Halloran
Pembroke Pines, FL, USA
RE: PD pump Shaft bend what could be the causes ?
Thanks for the inputs