The Roll-Bearing Damage Analysis of Centrifugal Pump (Zm11-W375/04) (original) (raw)

2020, IOP conference series

A series of activities was occupied to reveal the failure event of the pump bearing of SKF 6313 type. As the result of macroscopic and microscopic analysis, it was triggered by maintenance lack along the operation. The failure was proved by the metallographic test that there was a deformation caused heat that of the cooling distribution lack due to nonmaintenance periodically. The high local temperature cause the bearing life (L.10 standard) reduces, therefore it make a degradation of strength. Bearing life tends to decrease, according to the life calculation it should operate up to 8000 hours, but in fact, it is only operate between 2000-4000 hours. The bearings was made from the high carbon steel that follow the AISI-SAE 1095 standard, the chemical composition were 0.917% C, 0.41% Mn, 0.030% S. The deformation on the surface between two sides contacted ball of bearings was visible that of the suffered erosion due to friction, it could be predicted because of the lubrication lack, so it triggered an increasing of local contact temperature.