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

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (18) : 72-78.

ZHANG Lihao,HE Lidong,CHEN Zhao,WAN Fangteng,DING Jichao

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Abstract

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.

Key words

Integral Elastic Ring Squeeze Film Damper / Rotor pass through critical speed / Vibration reduction

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ZHANG Lihao,HE Lidong,CHEN Zhao,WAN Fangteng,DING Jichao. Structure design of an integral elastic ring squeeze film damper and experiments on the rotor passing through critical speed[J]. Journal of Vibration and Shock, 2019, 38(18): 72-78

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