vibration limit of bearing.

[hienvd]

Dear ALL,
I'am looking for standard for vibration limit of bearing (specially in pump).
anyone can help?

[MANS2013]

There are bearing frequencies which are depending upon revolutions of bearings . Means when rpm increases , frequencies are also increases .
Frequencies means bearing vibraion frequencies. There are equations to find out various frequencies of a bearing and to find out you need to have all internal dimensions like ball dia/ roller dia , pitch dia etc..

[hienvd]

I found out chart show the relation between magnitude of vibration and factor k= ((n/1000)^2)*d:
where:
n = speed in rpm
d = bearing bore diameter in mm.
but I do not know how we can draw two boundary lines which divive 3 regions.

[link Point to another website Only the registered members can access]

[yogacruise]

Dear sir,

Maximum allowable vibration according to API for horizontal pumps is 3.0 mm / sec RMS ( for pumps having max. rpm = 3600 and max. power absorbed = 300KW), while for vertically suspended pumps this limit is 5.0 mm / sec RMS. Plesae note that 30% increase in these vibration limits are allowable for pumps running at flows outside the preffered operating region but within the allowable opearting region.

[bmshah]

dear Hienve,
Pumps vibrations are measured on bearings for any type of pump.The details about limit,where to measure in axial,radial direction,where to keep probe ,etc
are given in ANSI/HI 9.6.4 2008 which is published by Hydraulic Institute of America.

[hienvd]

dear Hienve,
Pumps vibrations are measured on bearings for any type of pump.The details about limit,where to measure in axial,radial direction,where to keep probe ,etc
are given in ANSI/HI 9.6.4 2008 which is published by Hydraulic Institute of America.

could you give me ANSI/HI 9.6.4, bmshah