第52卷第21期 2016年11月
机械工程学报
JOURNALOFMECHANICALENGINEERING
DOI:10.3901/JME.2016.21.056
基于箔片非线性刚度模型的气体
箔片轴承静特性研究
徐方程1,2孙毅2刘占生张雯3（1.哈尔滨工业大学能源科学与工程学院哈尔滨150001：
2.哈尔滨工业大学航天学院哈尔滨150001： 3.中国运载火箭技术研究院北京100076)
Vol.52 Nov.
No.21 2016
摘要：基于箱片轴承结构刚度试验结果推导单个波纹箔片非线性刚度模型，通过有限差分法耦合求解气体Reynolds方程、气膜厚度方程和单个波纹箱片非线性刚度方程得到了轴承静态特性，研究波纹箱片非线性刚度对轴承静态特性的影响。通过
线性，轴承气膜压力分布不均使得轴承承载区波纹箱片的刚度要远远大于非承载区的刚度，并且轴承轻载时非线性刚度模型刚度值较小导致仿真得到的轴颈偏心率和非承载区的气膜厚度都明显大于文献恒定刚度模型的结果。此外，通过分析得出了一种先进行刚度试验得到单个箱片非线性刚度模型后利用数值方法进行求解的箔片轴承静特性分析方法。
关键词：波箱型径向气体轴承：波纹箱片非线性刚度模型；有限差分法：轴承静特性中图分类号：V229；TH133
StaticPerformanceofGasFoilBearingswithNonlinearFoilStiffnessModel
XUFangcheng'.2SUNYi2LIUZhansheng'2
ZHANGWen
(1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001;
2. School of Astronautics, Harbin Institute of Technology, Harbin 150001;
3. China Academy of Launch Vehicle Technology, Beijing 100076)
Abstract: The nonlinear stiffiness model of single bump foil is derived from foil bearing structural stiffiness tests, By using finite difference method, the gas Reynolds equation is solved coupled with film thickness and single bump foil stiffness equation. The effects of bump foil nonlinear stiffness on foil bearing static performance are studied. The numerical results of bump foil nonlinear stiffiness model are compared with constant stiffness model from reference. The results indicate that single bump foil has strong nonlinear stiffiness. The stiffness of bump foil at bearing load zone is much larger than that in non-load zone due to the uneven gas pressure distribution. Since the small bump foil stiffness value of nonlinear stiffness model in light load case, the journal eccentricity and gas film thickness at non-load zone of nonlinear stiffiness model are much larger that the results of constant stiffness model. In addition, a new approach to analyze foil bearing static performance is summarized which is derive single bump foil nonlinear stiffness model from bearing structural stiffiness experiments before numerical analysis of bearing-
Key words: bump-type gas foil bearing: bump foil nonlinear stiffness model: finite difference method: bearing static performancc
前言 0
气体箔片轴承是一种自润滑动压滑动轴承，因为相比于传统的油润滑滑动轴承和滚动轴承，箔片*国家自热科学基金资助项目(1176010).20150826收到初，20160401
收到修改弱万方数据
轴承的转速高、零环境污染、工作温度高和寿命长特点使其在高速微型燃气轮机领域具有广泛应用。
波箱型径向气体箔片轴承是气体箔片轴承的一种结构形式，其由底层的波纹箔片和项层的平箔片共同组成。建立箔片结构刚度模型是研究箔片轴承物理特性的重要一环，早在1975年WALOWIT 等"就通过忽略波纹箔片和平箔片之间的摩擦以及相邻两个波纹箔片之间的相互作用建立了单个波纹