김충현 임윤철 이성철 조준현 2024-01-20T14:04:43Z 2024-01-20T14:04:43Z 2021-09-06 2012-08 2713-8011 https://pubs.kist.re.kr/handle/201004/128999 The turbo pump of a liquid rocket engine is composed of three main parts: the oxidizer pump, fuel pump, and turbine. Liquid oxygen (LOX) is the working fluid in the cryogenic environment in the oxidizer pump, but tests are usually performed using liquid nitrogen (LN2), which has a boiling point similar to that of LOX but is comparatively safer and easier to use for the test. In this study, a bearing test rig is developed and its performance is evaluated using a cryogenic ball bearing with LN2 as the working fluid. Verifying the performance of the bearing test rig is crucial for ensuring correct working of the turbo pump unit in the liquid rocket engine. A stable test rig for the bearing in a cryogenic environment makes the bearing technology enhance its reliability. The test results show that the system operates stably and the requirement of performance time of 500 s is met. The test results of temperature, motor speed, and torque are discussed. The developed cryogenic bearing test rig is expected to help in widening knowledge and expanding research on ball bearings in the future. Korean 한국트라이볼로지학회 극저온 환경용 볼베어링 시험장치 개발 및 터보펌프용 볼베어링 시제품의 성능평가 Development of Cryogenic Test Rig for Ball-Bearing and Evaluation of the Performance of the Prototype Ball-Bearing of Turbo pump Article 2 한국트라이볼로지학회지, v.28, no.4, pp.167 - 172 한국트라이볼로지학회지 28 4 167 172 kci ART001800184 터보펌프 극저온 볼베어링 액체로켓엔진 액체질소 turbo pump cryogenic ball bearing liquid rocket engine liquid nitrogen