Vibration Mitigation in Hydraulic Pack
Vibration Mitigation in Hydraulic Pack
(OP)
Hi!
In a recently procured Hydraulic Pack, Vibrations are observed.
It is a motor driven rotory pump. Motor is fixed on a base plate while pump was originally hanging like a cantiliver - now supported from the bottom
The Axial Vibration monitored is about 8 mm / sec while on lateral Axis we found a Vibration of 3.3 mm / Sec
The pump is directly coupled by a flexible coupling to the drive.
1. Could any one tell if there are any standards which defines permissible levels of Vibrations ( I Mean is the above mentioned vibration levels are Techically acceptable? )
2. Client is not happy with the Axial Vibrations - what could be the solution - Vendor says he wants to support the pump from sides also ( left and right side while looking from the motor end )
3. Coupling is a flexible one - what could be the problem ?
4. I am not happy with the vendors solution
Can any one guide me on Vibration levels permissible and possible solution
Regards
In a recently procured Hydraulic Pack, Vibrations are observed.
It is a motor driven rotory pump. Motor is fixed on a base plate while pump was originally hanging like a cantiliver - now supported from the bottom
The Axial Vibration monitored is about 8 mm / sec while on lateral Axis we found a Vibration of 3.3 mm / Sec
The pump is directly coupled by a flexible coupling to the drive.
1. Could any one tell if there are any standards which defines permissible levels of Vibrations ( I Mean is the above mentioned vibration levels are Techically acceptable? )
2. Client is not happy with the Axial Vibrations - what could be the solution - Vendor says he wants to support the pump from sides also ( left and right side while looking from the motor end )
3. Coupling is a flexible one - what could be the problem ?
4. I am not happy with the vendors solution
Can any one guide me on Vibration levels permissible and possible solution
Regards





RE: Vibration Mitigation in Hydraulic Pack
Typically, the base plate, motor mount and pump mount need to be very thick and rigid. I use almost all C faced motor mounts with housing adaptor type of pump mount so haven't dealt with your style much.
If there is axial loading, I'd suspect either flexing in mounts that are soft in that direction, coupling misalignment that causes forces along the shaft axial drection, or something bent in motor or pump shafts.
In any case, the vendor should fix it. Adding braces to restrain the motions would not be acceptable to me unless they could show the reason why it was flexing in that direction. Simply restraining the motions may mask the real problems, and just transfer the loads into motor or pump bearing failures.
kcj
RE: Vibration Mitigation in Hydraulic Pack
Many thanks - Mechatronic
RE: Vibration Mitigation in Hydraulic Pack
Not well placed to help if it's just the equipment that's at risk.
A.
RE: Vibration Mitigation in Hydraulic Pack
You may need some vibration analysis to indentify frequencies of interest, and if resonance is amplifying "acceptable" vibration.
RE: Vibration Mitigation in Hydraulic Pack
mechatronic, for vibration severity charts you can refer to the ISO 10816 (particularly ISO 10816-3).
Good luck !