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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

Abstract

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.

본 논문에서는 상용 회전체 동역학 해석 툴을 이용하여 경사 운전조건을 고려한 대용량 추진 전동기용 베어링 개발에 상사적 설계 방법과 실험적 방법을 적용하였다. 개발된 베어링은 전기적으로 절연이 되어있으며 각 연결부는 2~4mm 의 에폭시 절연판을 연결하여 낮은 열전도 특성을 가지도록 하였다. 본 연구에서는 기존의 저속운전에서 야기되는 베어링 손상 문제를 해결하기 위해 원활한 유막이 생성될 수 있도록 고안한 정압 윤활장치를 적용하여 우수한 윤활특성을 확보하였다. 또한 대형 중량물에 대한 유지보수를 고려하여 반분할 방식의 조립구조를 적용하였다. 본 논문은 고부하, 저속 운전의 추진 전동기 분야에 사용되는 미끄럼 베어링의 주요 핵심설계요소를 언급하였다. 게다가, 시험벤치상에서 다양한 경사조건을 통해 실링부의 오일누유 현상을 확인하였다.

Keywords

References

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