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How to determine looseness in a machine
Posted: 18 Aug 2010, 16:08
by machinedoc
Can anybody tell how to determine from the vibration spectrum that the fault is looseness (structure or part)?
Re: How to determine looseness in a machine
Posted: 19 Aug 2010, 07:33
by fraz
In a spectrum looseness is indicated by the harmonics at mutiples of machine running frequency. For example if a machine is ritating at 3000 rpm, if vibration is appearing at 3000 rpm, 6000 rpm, 9000 rpm and so on, then it is structural or part looseness
Re: How to determine looseness in a machine
Posted: 12 Sep 2010, 08:26
by yahoo
A good way to check looseness is by taking phase readings at different points and comparing them with the adjacent components.
Re: How to determine looseness in a machine
Posted: 12 Sep 2010, 09:09
by fraz
Yes, you have rightly explained this is true for structural looseness