Vibration Analysis of Compressors
It is easier to inspect compressors with the combination of Ultrasound Analysis and thermography for quicker inspection, but adding Vibration Analysis in it helps to know condition of compressor more clearly.
Most of the problems lie with driving Motor in Compressor Unit. Please refer Electric Motor section in VA for it,
Most of the problems lie with driving Motor in Compressor Unit. Please refer Electric Motor section in VA for it,
Centrifugal Compressors: Centrifugal compressors generate spectra similar to centrifugal fans in that the vane pass frequency will be dominant. Damaged or eroded vanes will cause increases in the level at the vane pass, and also will usually produce 1X sidebands around the vane pass. Compressor surge is a fluid dynamic problem at the compressor output port that usually causes vibration at less than 1X frequency. It is often caused by improper output pressure.
Reciprocating Machines The most common types of reciprocating machines are and compressors. In all these machines, the piston rate (usually 1X) is dominant, along with the firing rate for 4-cycle engines. Vibration levels as high as 125 VdB (1.0 inches per second peak) are not uncommon for healthy machines such as these. The analyst must judge the machine condition by comparison to previous levels rather than applying absolute reference levels.