[논문] 탄성 링을 갖는 볼 베어링 지지의 터보 펌프 임계 속도에 관한 연구

This study was performed to evaluate the dynamic behavior of turbo pump unit. The acceptable separate margin of 1st critical speed was obtained by the use of elastic-ring inserted ball bearing, while the poor separate margin of 1st critical speed was appeared in the case without the elastic-ring. In addition, the results show that the stiffness and damping of plain seals give more separate margin of 2nd critical speed. However the wear or the failure of seals could reduce the 2nd critical speed near the operating speed.