Abstract

A technique for conducting experiments on determining wear features for thrust slide bearings is presented. The friction coefficient depending on the load and on the rotation velocity of the samples, on the changes in the wear weight fraction, and on the surface roughness parameters are determined. The effect of thickness, propagation, and interaction on the oil film formed in a hydrodynamic friction mode on the wear of friction pairs is considered. An instrumental support of the experiment is described, the results and conclusions are presented. It is noted that the local maximum of the friction coefficient is reached at approximately 900 rpm for all the samples and, for each load level, a corresponding minimum of friction coefficient is observed, which increases with increasing rotation velocity. In the course of testing, the minimum values of friction coefficient have been observed in the ranges of 550–650 rpm and 1050–1150 rpm. For the used testing mode, the smallest change in the surface roughness of the samples amounted to R_a = 0.46–045 μm for steel samples and R_a = 0.75–0.89 μm for bronze samples, respectively. These roughness values have been subjected to changes to a lesser extent, being close to the equilibrium roughness in the course of the testing. It should be noted that the greatest weight wear level of the samples occurs under running-in, and, when equilibrium roughness and the minimum friction coefficient have been reached, the sample wear level exhibits a decrease. In addition, upon the experiments, the distribution of the hydrodynamic oil film pressure over the surfaces of the samples was revealed based on the wear scars in the outer circuit, and its high-pressure belt was expanded in the circumferential direction.

中文翻译：

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滑动推力轴承摩擦过程的实验研究。

摘要

提出了一种进行实验以确定推力滑动轴承磨损特征的技术。确定取决于载荷和样品旋转速度，磨损重量分数的变化以及表面粗糙度参数的摩擦系数。考虑了厚度，传播和相互作用对以水动力摩擦模式形成的油膜对摩擦副磨损的影响。描述了实验的仪器支持，并给出了结果和结论。要注意的是，对于所有样品，摩擦系数的局部最大值均达到约900 rpm，并且对于每个负载水平，都观察到了相应的最小摩擦系数，该摩擦系数随着转速的增加而增加。在测试过程中，在550–650 rpm和1050–1150 rpm的范围内观察到了最小的摩擦系数值。对于使用的测试模式，样品表面粗糙度的最小变化为钢样品的R _a = 0.46-045μm ，铜样品的R _a = 0.75-0.89μm。这些粗糙度值的变化程度较小，在测试过程中接近平衡粗糙度。应该注意的是，样品的最大磨损量是在磨合时发生的，当达到平衡粗糙度和最小摩擦系数时，样品的磨损量会降低。另外，在实验中，基于外部回路中的磨损痕迹揭示了流体动力油膜压力在样品表面上的分布，并且其高压带在周向上扩展。