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首页> 外文期刊>Microsystem technologies >Complete determination of the dynamic coefficients of coupled journal and thrust bearings considering five degrees of freedom for a general rotor-bearing system
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Complete determination of the dynamic coefficients of coupled journal and thrust bearings considering five degrees of freedom for a general rotor-bearing system

机译：考虑到五个常规转子轴承系统的自由度，可以完全确定联轴器和推力轴承的动态系数

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摘要

A complete method is presented for calculating the stiffness and damping coefficients of coupled journal and thrust bearings of a general rotor-bearing system considering five degrees of freedom. The Reynolds equations and their perturbation equations were derived by linearization of the bearing reaction with respect to the general five degrees of freedom, i.e., the tilting displacements and angular velocities as well as the translational displacements and velocities. The Reynolds equations and their perturbation equations were transformed into finite element equations by considering the continuity of pressure and flow at the interface between the journal and the thrust bearings. The Reynolds boundary condition was included in the numerical analysis so as to simulate the phenomenon of cavitation. The stiffness and damping coefficients of the proposed method were compared with those found from a numerical differentiation of the loads with respect to the finite displacements and velocities of the bearing center. It was shown that the proposed method may be used to calculate the dynamic coefficients of coupled journal and thrust bearings more accurately and efficiently than the differentiation method. The tilting motion was also been found to play an important role in the determination of force and moment coefficients.
机译：提出了一种用于计算考虑了五个自由度的普通转子轴承系统的联轴器和推力轴承的刚度和阻尼系数的完整方法。雷诺方程及其摄动方程是通过相对于一般五个自由度（即倾斜位移和角速度以及平移位移和速度）的轴承反作用线性化而得出的。通过考虑轴颈和推力轴承之间界面处压力和流量的连续性，将雷诺方程及其摄动方程转化为有限元方程。数值分析中包括了雷诺边界条件，以模拟空化现象。将所提方法的刚度和阻尼系数与从载荷相对于轴承中心的有限位移和速度的数值微分中获得的刚度和阻尼系数进行了比较。结果表明，与微分法相比，该方法可以更准确，更有效地计算轴颈和推力轴承的动力系数。还发现倾斜运动在确定力和力矩系数中起重要作用。

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