整体式弹性环挤压油膜阻尼器结构设计与转子过临界实验研究  

Structure design of an integral elastic ring squeeze film damper and experiments on the rotor passing through critical speed

作　　者：张力豪 何立东[1] 陈钊 万方腾 丁继超 ZHANG Lihao;HE Lidong;CHEN Zhao;WAN Fangteng;DING Jichao(Key Laboratory of High-end Equipment Health Monitoring and Self-Recovery,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学北京市高端装备健康监控与自愈化重点实验室

出　　处：《振动与冲击》2019年第18期72-78,108,共8页Journal of Vibration and Shock

基　　金：国家973计划(2012CB026000);15年北京市共建-科研与研究生培养(21510028008)

摘　　要：航空发动机等高速柔性转子,工作转速过临界。由于存在不可避免的不平衡质量,转子过临界时会发生剧烈共振。通过使用弹性支撑降低转子系统的临界转速,使用挤压油膜阻尼器(SFD)增加支撑阻尼,可以降低转子过临界振动和外传力。将弹性支撑和阻尼器合二为一,开发设计了新型整体式弹性环挤压油膜阻尼器(IERSFD),构建力学模型并分析了减振原理,在实验室搭建了单盘Jeffcott转子,在IERSFD腔室填充不同黏度阻尼液的条件的下,进行了转子过临界实验,结果表明IERSFD可以有效降低转子过临界振动。High-speed rotors such as aero engine rotors are flexible rotors,their working speed is above its critical speed.Due to the inevitable unbalanced mass,severe vibrations often occur when the rotor passes through critical speed.By using the elastic support to lower the critical speed of the rotor system and increasing the support damping by introducing squeeze film damper(SFD),the vibration and the external force of the rotor passing through critical speed could be reduced.Combining the elastic support and the damper into one component,a new type of integral elastic ring squeeze film damper(IERSFD)was designed,its mechanical model was built and the principle of vibration reduction was analyzed.A Jeffcott rotor test rig was built in the laboratory.Experiments on the rotor through critical speed were performed,in the condition that the IERSFD chamber was filled with different viscosity damping fluids.The results show that the IERSFD can effectively reduce the vibration of rotors passing through critical speed.

关 键 词：整体式弹性环挤压油膜阻尼器(IERSFD) 转子过临界 减振 

分 类 号：TB535[理学—物理] O328[理学—声学]