薄环-紊动射流小孔挤压油膜阻尼器压力特性

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (9) : 151-160.

论文

杨小民1，杨海生1，崔永存1，李彦1，蒋炳珍2，邓四二1

作者信息 +

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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文章历史 +

摘要

为研究单层弹性环式挤压油膜阻尼器的油膜压力特性，建立薄环-紊动射流小孔模型。通过平面薄环弯曲理论和普朗特边界层理论分别计算弹性环变形和阻尼孔出口净流速；分析弹性环柔度、阻尼孔直径及进动角变化对油膜压力特性的影响，并开展外腔油膜压力多转速测量实验。结果表明，外腔油膜压力随弹性环柔度的减小而下降，但随阻尼孔直径的减小而增加；对于内腔油膜压力，阻尼孔直径的影响与外腔相似，但减小弹性环柔度导致压力增加。实验表明，外腔油膜压力在不同转速下均同步方位角周期变化，而高转速时，压力幅值略有增加。

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.

导出引用

杨小民1，杨海生1，崔永存1，李彦1，蒋炳珍2，邓四二1. 薄环-紊动射流小孔挤压油膜阻尼器压力特性[J]. 振动与冲击, 2023, 42(9): 151-160

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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