Theoretical and Experimental Determination of the Dynamic Characteristics of a Hydrodynamic Journal Bearing
Theoretical and Experimental Determination of the Dynamic Characteristics of a Hydrodynamic Journal Bearing
复制标题
流体动压轴颈轴承动态特性的理论和实验测定
DOI：
10.1115/1.3453289
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
D. Parkins
中科院分区：
文献类型：
--
作者：
D. Parkins
本文对流体动压滑动轴承横向柔度的八个系数的非线性特性进行了理论和实验研究。系数计算允许粘度随温度和压力而变化，并检查了一系列正、负位移和速度。实验技术已经开发，其中系数推导出从专门选择的，施加的振动轨道所产生的两个相互垂直的外部振荡力的变量的相对大小和相位。轴颈中心位移和速度的测量使用高速数据记录设备。系数由“零”值和线性梯度定义。使用现实的标准，发现测得的系数非线性在偏心率大于0.78时显着。理论充分预测了一些“零”值，但没有预测梯度。系数预测的改进可以取决于包括一些先前的历史相关因子。
This paper describes a theoretical and experimental investigation into the nonlinear characteristics of the eight coefficients which specify the lateral flexibility of a hydrodynamic journal bearing. Coefficient calculations allowed viscosity to vary with temperature, and pressure, and examined a range of positive and negative displacements and velocities. Experimental techniques have been developed in which coefficients were deduced from specially chosen, imposed vibration orbits arising from two mutually perpendicular external oscillating forces of variable relative magnitude and phase. Journal centre displacement and velocity were measured using high speed data logging equipment. Coefficients are defined in terms of a “zero” value and linear gradient. Using realistic criteria, measured coefficient non-linearity was found to be significant at eccentricity ratios greater than 0.78. Theory adequately predicted some “zero” values but not gradients. An improvement in the coefficient prediction may depend on the inclusion of some previous history dependent factors.