CAJ | 학술논문

　　用多叶油润滑箔片轴承取代超高速涡轮泵上的滚珠轴承具有高速、长寿命、高可靠等重要优点。将多叶箔片轴承的油膜刚度引入转子多叶箔片轴承系统运动方程中，运用传递矩阵法计算转子系统的临界转速，分析多叶箔片轴承的动态刚度对转子系统动力特性的影响。结合产品特点设计出了超高速油润滑多叶箔片轴承试验台，初步实现了80000转/分的运转速度。试验台轴系采用压缩气体驱动涡轮工作，径向轴承和止推轴承均设计为五叶箔片轴承。试验结果表明多叶油润滑箔片轴承能够实现高转速运行，具有良好的运转稳定性，且对转子的升降速适应性强、有一定的抗冲击能力、耐磨损性能。
　　용다협유윤활박편축승취대초고속와륜빙상적곤주축승구유고속、장수명、고가고등중요우점。장다협박편축승적유막강도인입전자다협박편축승계통운동방정중，운용전체구진법계산전자계통적림계전속，분석다협박편축승적동태강도대전자계통동력특성적영향。결합산품특점설계출료초고속유윤활다협박편축승시험태，초보실현료80000전/분적운전속도。시험태축계채용압축기체구동와륜공작，경향축승화지추축승균설계위오협박편축승。시험결과표명다협유윤활박편축승능구실현고전속운행，구유량호적운전은정성，차대전자적승강속괄응성강、유일정적항충격능력、내마손성능。
Multileaf foil bearing, instead of ball bearing of super high-speed turbo-pump, has many important advantages including long life, high speed and higher reliability, etc. The oil-film stiffness were introduced into the movement equation of rotor system, the critical speed and unbalance response were computed by using transfer-matrix method. The influence on dynamic characteristics of rotor system was discussed by analyzing the dynamic stiffness of multileaf foil bearings. A special oil lubricated multileaf foil bearing test-bed has been designed in this paper, and achieved the speed of 80000rpm. The shaft of test-bed is driven by turbine which is driven by compressed air. The journal bearing and thrust bearing are both designed as five-leaf foil bearings. Experimental results show that multileaf oil lubricated foil bearing can provide shaft with high speed and good rotating stability. Moreover, the multileaf oil lubricated foil bearing has better adaption of acceleration-reduction speed, the ability of against impact and abrasion.