Abstract—

Wear of the contact surfaces is an important characteristic of rib-roller end interaction of roller bearings. The purpose of this study was to develop effective methods for calculating the wear rate of these surfaces under alternating dynamic loads. In wear rate calculations of bearing parts, as a rule, Archard’s law is used since it has been verified in hydrodynamic friction testing of bearing steels. In the paper, based on this law, a direct step-by-step wear rate calculation method for rib-roller end contact at variable loads and sliding speeds is developed. According to it, normal force, sliding velocity, and contact oil film thickness are determined in bearing dynamic modeling, and the finite element method is used to calculate contact pressure fields. A multi-mass bearing dynamic model includes a contact friction model, which allows an adequate description of hydrodynamic contact behavior of solid bodies. Using the bearing life dependence on the oil film parameter and experimentally measured steel bearing wear rates, the dependence of wear coefficient on the oil film parameter is obtained. The direct calculation method involves many computations, which makes the influence of individual factors on wear rate non-obvious. In this regard, a method of wear rate calculation with averaged parameters is also proposed. Using these two methods, rib-roller end wear calculations for a double-row tapered roller bearing are implemented. The spherical shape of the roller end and conical, toroidal convex, and concave shapes of the rib are considered. Comparison of wear rates obtained by the two methods confirms the acceptable accuracy of calculations with averaged parameters. The results in particular demonstrate that a toroidal concave rib surface allows reducing the wear rate up to three times in comparison with the tapered surface.

中文翻译：

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圆锥滚子轴承挡边-滚子端部在流体动力接触时的相互作用

摘要—

接触面的磨损是滚子轴承挡边-滚子端面相互作用的一个重要特征。本研究的目的是开发有效的方法来计算这些表面在交变动态载荷下的磨损率。在轴承零件的磨损率计算中，通常使用阿查德定律，因为它已在轴承钢的流体动力摩擦试验中得到验证。在本文中，基于该定律，开发了变载荷和滑动速度下挡边-滚子端面接触的直接逐步磨损率计算方法。据此，在轴承动态建模中确定法向力、滑动速度和接触油膜厚度，并使用有限元法计算接触压力场。多质量轴承动力学模型包括接触摩擦模型，这允许充分描述固体的流体动力接触行为。使用轴承寿命对油膜参数的依赖性和实验测量的钢轴承磨损率，获得磨损系数对油膜参数的依赖性。直接计算法计算量大，个别因素对磨损率的影响不明显。对此，还提出了一种参数平均的磨损率计算方法。使用这两种方法，实现了双列圆锥滚子轴承的挡边滚子端面磨损计算。考虑了滚子端部的球形和挡边的圆锥形、环形凸形和凹形。通过两种方法获得的磨损率的比较证实了平均参数计算的可接受精度。