Evaluation of Friction Torque for a Turbopump Ball Bearing

터보펌프 볼 베어링의 마찰 토크 평가

  • Jeon, Seong-Min (Turbopump Department, Korea Aerospace Research Institute) ;
  • Kwak, Hyun-Duck (Turbopump Department, Korea Aerospace Research Institute) ;
  • Kim, Jin-Han (Turbopump Department, Korea Aerospace Research Institute)
  • 전성민 (한국항공우주연구원 터보펌프팀) ;
  • 곽현덕 (한국항공우주연구원 터보펌프팀) ;
  • 김진한 (한국항공우주연구원 터보펌프팀)
  • Received : 2010.11.25
  • Accepted : 2011.01.12
  • Published : 2011.02.28


Rolling contact ball bearings are utilized almost exclusively for liquid propellant rocket engine turbopump. Turbopump ball bearings are required to endure high speed and high load for a poor lubricated condition in cryogenic environment. To evaluate bearing heat generation performance, friction torque is investigated as a function of rotation speed, bearing load and cooling flow rate through an experimental study using water coolants. Radial and axial loads are simultaneously applied to the test bearing by gas pressurized cylinder rod. Endurance performance of bearing has been also verified under the bearing required load for operating condition during total accumulated test time 2,100 sec.


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