基于波纹箔片刚度试验的气体箔片轴承动力学特性

doi:10.3901/JME.2015.21.057

机械工程学报 ›› 2015, Vol. 51 ›› Issue (21): 57-64.doi: 10.3901/JME.2015.21.057

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基于波纹箔片刚度试验的气体箔片轴承动力学特性

徐方程¹, 张雯², 刘占生¹

1. 哈尔滨工业大学能源科学与工程学院哈尔滨 150001;
2. 中国运载火箭技术研究院北京 100076

收稿日期:2015-06-08 修回日期:2015-09-25 出版日期:2015-11-05 发布日期:2015-11-05
通讯作者: 徐方程, 男，1985年出生，博士后。主要研究方向为气体箔片轴承、箔片密封、挤压油膜阻尼器及转子动力学。 E-mail：xufangcheng1985@gmail.com
作者简介:徐方程, 男，1985年出生，博士后。主要研究方向为气体箔片轴承、箔片密封、挤压油膜阻尼器及转子动力学。 E-mail：xufangcheng1985@gmail.com
基金资助:
国家自然科学基金资助项目(11176010)

Dynamic Characteristics of Gas Foil Bearing Based on Bump Foil Stiffness Test

XU Fangcheng¹, ZHANG Wen²,LIU Zhansheng¹

1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001;
2. China Academy of Launch Vehicle Technology, Beijing 100076

Received:2015-06-08 Revised:2015-09-25 Online:2015-11-05 Published:2015-11-05

摘要/Abstract

摘要：

为了研究波纹刚度特性以及其对箔片轴承动力学特性的影响，设计了波纹箔片刚度测试试验台。分别对两端固定和一端固定一端自由两种约束条件下的波纹箔片刚度进行了测试，并将试验结果与仿真结果进行了对比分析。最后基于轴承波纹结构刚度特性，利用小扰动法求解了轴承动力学特性系数，研究了波纹箔片刚度特性对轴承动力学特性系数的影响。结果表明：两端固定波纹箔片刚度较一端固定一端自由波纹箔片单位宽度刚度大5倍以上，并且随着波纹变形量的增加，两端固定约束使其波纹箔片刚度比一端固定一端自由波纹箔片更具有非线性，而刚度仿真结果并没有体现出非线性，只是模型中引入的结构摩擦因数使得刚度值随摩擦因数有所增大。最后轴承载荷增加会使得轴承刚度系数以及主阻尼增加，其他阻尼系数减小，并且鉴于波纹箔片刚度非线性的原因，采用刚度试验值计算得到的轴承动力学系数增加幅度要明显大于文献仿真模型。

关键词: 结构刚度, 两端固定, 一端固定一端自由, 轴承动力学特性系数, 波纹箔片

Abstract:

In order to study the bump stiffness and its effect on dynamic coefficients of foil bearing, a test rig is designed to measure the stiffness of bump foil. Two type of bump foil under fixed-fixed ends and fixed-free ends constraint conditions are both tested and the experimental results are compared with numerical results. Finally, based on the obtained bump foil stiffness, the dynamic coefficients of foil bearing are obtained by using perturbation method, and the effect of bump foil stiffness on these coefficients are studied. The results indicate that the fixed-fixed ends bump foil has 5 times greater stiffness per unit width than fixed-free ends bump foil, and with the increase of bump deflection, the stiffness of fixed-fixed ends bump foil is more nonlinear than the fixed-free ends bump foil, but the numerical results don’t show any same nonlinear feature except of the increase of stiffness value due to the structural friction coefficient. At last, the bearing stiffness and direct damping can be enlarged with the increase of bearing load while the other damping values decrease, and values of bearing dynamic coefficients using tested bump stiffness grow faster than using numerical bump foil stiffness due to the nonlinear stiffness features of bump foil.

Key words:

徐方程, 张雯, 刘占生. 基于波纹箔片刚度试验的气体箔片轴承动力学特性[J]. 机械工程学报, 2015, 51(21): 57-64.

XU Fangcheng, ZHANG Wen, LIU Zhansheng.

Dynamic Characteristics of Gas Foil Bearing Based on Bump Foil Stiffness Test

[J]. Journal of Mechanical Engineering, 2015, 51(21): 57-64.

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基于波纹箔片刚度试验的气体箔片轴承动力学特性

Dynamic Characteristics of Gas Foil Bearing Based on Bump Foil Stiffness Test

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