Development of Large Propulsion Motor Bearings Considering Slope Conditions

경사조건을 고려한 대용량 추진 전동기용 베어링 개발에 대한 연구

  • Oh, Seung Tae (Power & Industrial System R&D Center, Hyosung Corporation) ;
  • Choi, Jin Woo (Power & Industrial System R&D Center, Hyosung Corporation) ;
  • Kang, Byeng Hi (Power & Industrial System R&D Center, Hyosung Corporation) ;
  • Kim, Jin (Power & Industrial System R&D Center, Hyosung Corporation) ;
  • Choi, Seong Pil (Dept. of R&D Center, Turbolink Co., Ltd.) ;
  • Bin, Jae Goo (Dept. of the 6th R&D Institute-3 Agency for Defense Development (ADD))
  • Received : 2011.12.22
  • Accepted : 2012.10.18
  • Published : 2013.02.04


In this study, bearings were developed for a high-power propulsion motor operating in inclined operation conditions through a simulation and similitude-experimental methods using commercial rotating machinery dynamics analysis software. The developed journal bearing is electrically insulated and has low thermal conductivity because each part is connected with 2-4 -mm-thick epoxy plates. To realize an appropriate oil thickness, an oil lift system is adopted, and a half separated structure is applied to ensure the feasibility of maintaining very heavy components. This study discusses some of the key design aspects of sleeve bearing design for high-torque and low-speed propulsion motor applications. Furthermore, the conditions of variable slope tests are examined to prevent oil leakage from the bearing lip seal on the test rig.


Propulsion Motor;Journal Bearing;Thrust Bearing;Film Thickness;Power Loss;Bearing Load;Oil-Lift System


Supported by : (주)효성중공업


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