Unbalanced pump detection using modified transfer path analysis

Unbalance is the term in a rotating machine that used for a mass distribution which is not rotationally symmetric. Vibration from unbalancing pump affects to other pumps located on the same single base frame due to transmissibility. However, the unbalanced vibration can disturb and give a negative impact to other pumps on the same base frame. Therefore it is important to detect unbalance pump early which transmitted through the base frame because it can save large amounts of money. The aim of this research is evaluating the modification of transfer path analysis method that applied as a detecting pump damage method compare to International Standard. In this research, Modified Transfer Path Analysis (MTPA) is equal to the operational force that found by convolution of the natural frequencies with operational acceleration. The value of natural frequencies are determined using experimental modal analysis and the value of operational acceleration is determined by measuring the acceleration when the vibration source (pump machine) is running on steady condition. ISO 13373-1 was used as the reference for damage detection on the pump system. The results show that MTPA has the same characteristics and in agreement with ISO 13373-1 in detecting unbalance pump condition for machinery condition monitoring.