| Title |
Thermal Reliability Analysis of the Bearing Units in a Centrifugal Pump |
| Authors |
문정환(Jung-Hwan Moon) ; 문승재(Seung-Jae Moon) ; 이재헌(Jae-Heon Lee) |
| Keywords |
베어링 유닛 ; 열신뢰성 ; 윤활 ; 점도 ; 보정정격수명 Bearing unit ; Thermal reliability ; Lubrication ; Viscosity ; Adjusted rating time |
| Abstract |
In this paper, the experimental study has been carried out to investigate the reliability lifetime of two bearing units based on the oil temperature. Measurements for the oil temperature as well as the bearing temperature during normal operation were performed to study the effects of oil viscosity and oil submergence percentages in the two bearing units. The optimal lubrication condition to increase the lifetime of the bearing unit A was found that its viscosity and submergence percentage were VG32 and 25%, respectively. For the bearing unit B, when the oil viscosity and submergence percent were VG32 and 75%, the lubrication condition was the most efficient. Finally, the adjusted rating times of both the bearing units were calculated to be over 28,000h, which is greater than the minimum adjusted rating times of 25,000h. Therefore, they satisfied the regulated lifetime of API 610. |