Pressure characteristics of squeeze film damper with thin-walled ring-turbulent jet orifice

YANG Xiaomin1, YANG Haisheng1, CUI Yongcun1, LI Yan1, JIANG Bingzhen2, DENG Sier1

Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (9) : 151-160.

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PDF(3970 KB)
Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (9) : 151-160.

Pressure characteristics of squeeze film damper with thin-walled ring-turbulent jet orifice

  • YANG Xiaomin1, YANG Haisheng1, CUI Yongcun1, LI Yan1, JIANG Bingzhen2, DENG Sier1
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Abstract

In order to uncover the Oil Film Pressure Performance (OFPP) for Elastic Ring Squeeze Film Damper (ERSFD), a thin-walled ring and turbulent-jet orifice model was proposed. The ring deformation and orifice outflow rate are addressed respectively by applying planar thin-ring bending theory and the Prandtl boundary layer theory. The influence of elastic ring flexibility, orifice diameter, and attitude angle on the OFPP was analyzed, with outer chamber pressure measured at different rotor speeds. The results indicate that the outer chamber pressure drops as the elastic ring flexibility decreases but boosts with the reduction of the orifice diameter. For inner chamber pressure, the orifice diameter effects a similar trend to the outer cavity, but minimizing the elastic ring flexibility causes an increase in amplitude. The experiment shows that the outer chamber pressure shifts synchronously and periodically with the attitude angle, while the amplitude increases slightly at higher rotor speeds.

Key words

Elastic ring squeeze film damper / thin-walled ring / orifice / turbulent jet / aero-engine

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YANG Xiaomin1, YANG Haisheng1, CUI Yongcun1, LI Yan1, JIANG Bingzhen2, DENG Sier1. Pressure characteristics of squeeze film damper with thin-walled ring-turbulent jet orifice[J]. Journal of Vibration and Shock, 2023, 42(9): 151-160

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