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탄성 링을 갖는 볼 베어링 지지의 터보 펌프 임계 속도에 관한 연구
이용복,김창호,곽현덕,하태웅,우유철,Lee, Yong-Bok,Kim, Chang-Ho,Kwak, Hyun-Duck,Ha, Tae-Woong,Yoo, Woo-Chul 한국유체기계학회 2001 한국유체기계학회 논문집 Vol.4 No.2
This study was performed to evaluate the dynamic behavior of turbo pump unit. The acceptable separate margin of $1^{st}$ critical speed was obtained by the use of elastic-ring inserted ball bearing, while the poor separate margin of $1^{\st}$ 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 $2^{nd}$ critical speed. However the wear or the failure of seals could reduce the $2^{nd}$ critical speed near the operating speed.