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    王旭, 许浩杰, 邵聪鹏, 安琦. 推力空气箔片轴承新型结构构建及其动力学性能[J]. 华东理工大学学报(自然科学版), 2023, 49(5): 764-772. DOI: 10.14135/j.cnki.1006-3080.20220517001
    引用本文: 王旭, 许浩杰, 邵聪鹏, 安琦. 推力空气箔片轴承新型结构构建及其动力学性能[J]. 华东理工大学学报(自然科学版), 2023, 49(5): 764-772. DOI: 10.14135/j.cnki.1006-3080.20220517001
    WANG Xu, XU Haojie, SHAO Congpeng, AN Qi. Structural Construction and Dynamic Performance of a New Thrust Air Foil Bearing[J]. Journal of East China University of Science and Technology, 2023, 49(5): 764-772. DOI: 10.14135/j.cnki.1006-3080.20220517001
    Citation: WANG Xu, XU Haojie, SHAO Congpeng, AN Qi. Structural Construction and Dynamic Performance of a New Thrust Air Foil Bearing[J]. Journal of East China University of Science and Technology, 2023, 49(5): 764-772. DOI: 10.14135/j.cnki.1006-3080.20220517001

    推力空气箔片轴承新型结构构建及其动力学性能

    Structural Construction and Dynamic Performance of a New Thrust Air Foil Bearing

    • 摘要: 提出一种新型推力箔片轴承,该轴承的优点是通过波箔和平箔的组合来改变箔片轴承的轴向刚度等动态特性。以新型推力箔片轴承为对象,运用弹性力学理论分析推力箔片轴承顶箔和波箔的变形,联立黏温方程、气膜三维能量方程和等温Reynolds方程得到非等温Reynolds方程。利用小扰动法处理非等温Reynolds方程得到气膜压力的定常控制方程和微分控制方程。运用有限差分法和逐点松弛迭代法对其进行数值求解得到推力箔片轴承的气膜压力分布、气膜厚度分布、箔片变形量分布、气膜温度分布、轴向刚度、轴向阻尼等特性参数。结果表明,箔片轴承的轴向刚度和轴向阻尼随着波拱半长、楔形间隙高度差、波拱半径的增加而减小;轴向刚度和轴向阻尼随着涡动频率比、转速、波箔厚度、顶箔厚度、轴承外径的增加而增大。

       

      Abstract: A new type of thrust foil bearing is proposed. The advantage of this bearing is that it can change the dynamic characteristics such as the axial stiffness of the foil bearing by the combination of bump foil and flat foil. Taking the new type of thrust foil bearing as a research object, the deformation of top foil and bump foil of the thrust foil bearing is analyzed by elastic mechanics theory, and the non-isothermal Reynolds equation is obtained by combining viscosity-temperature equation, three-dimensional energy equation of the gas film and isothermal Reynolds equation. The non-isothermal Reynolds equation is processed by the small perturbation method to obtain the steady control equation and differential control equation of the gas film pressure. Using finite difference method and point-by-point relaxation iteration method to solve it numerically, the air film pressure distribution, air film thickness distribution, foil deformation distribution, air film temperature distribution, axial stiffness, and axial damping of the thrust foil bearing are obtained. The results show that the dynamic stiffness and damping of foil bearing decrease with the increase of wave arch half-length, wedge gap height difference and wave arch radius. Dynamic stiffness and dynamic damping increase with the increase of whirl frequency ratio, rotational speed, wave foil thickness, top foil thickness and bearing outer diameter.

       

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