国外文献 > 1.轴承 > 1. 基础理论与机制 > 动力学与稳定性
关键词搜索：
| 标 题： |
A Fast Calculation Approach for Elastohydrodynamic Finite Line Contacts Applicable to Online Calculations of Rolling Bearing Models
适用于滚动轴承模型在线计算的弹性流体动力学有限线接触快速计算方法 |
| 作 者： |
Yang, Di
Wang, Xi
Hou, Yu |
| 关键词： |
contact mechanics [接触力学]
elastohydrodynamic lubrication [ 弹性流体动力润滑]
finite line contacts [ 有限线接触]
rolling element bearings [ 滚动轴承]
bearing model [ 轴承型号]
POINT CONTACTS [ 联系人：薄膜厚度]
FILM THICKNESS [ 润滑]
LUBRICATION [ 刚性]
STIFFNESS [ CAGEDYN] |
| 出版年： |
2024 |
| 期刊名： |
Journal of Tribology
摩擦学杂志 |
| 年卷期： |
2024, vol.146, no.7 |
| 摘 要： |
Finite line contacts in rolling element bearings are usually under the regime of elastohydrodynamic lubrication (EHL). To obtain deeper insights into bearing performance, it is necessary to directly couple EHL contact models into bearing models. However, the existing EHL contact models are either too time consuming to be employed in the bearing model or too simplified to consider tilting contact behaviors and actual roller profiles. A fast calculation approach for EHL finite line contacts is proposed by combining the empirical film thickness formulas that have been developed for decades and an improved slicing technique that considers the coupling behaviors between slices. The proposed approach can not only predict the contact stiffness (normal contact stiffness and tilting contact stiffness) and contact states (contact pressure and film thickness) accurately but also is universal for different profiled contacts and material properties. The proposed approach costs only a few milliseconds for a single load case, which enables it to be directly employed in bearing models. Besides, the proposed approach is more of a framework, the use of which can be extended by involving different film thickness formulas and correction factors to consider complicated EHL behaviors such as thermal effects, shear thinning effects, surface roughness, lubricant starvation, and so on.
滚动轴承中有限线接触通常处于弹性流体动力润滑（EHL）的范围内。为了更深入地了解轴承性能，有必要将EHL接触模型直接耦合到轴承模型中。然而，现有的EHL接触模型要么在计算上耗时过长，无法用于轴承模型，要么过于简化，难以考虑倾斜接触行为和实际滚子轮廓。本文提出一种针对EHL有限线接触的快速计算方法，该方法结合了数十年来发展起来的经验性膜厚公式，以及一种改进的切片技术，能够有效考虑不同切片之间的耦合行为。所提出的方案不仅能准确预测接触刚度（法向接触刚度和倾斜接触刚度）及接触状态（接触压力和膜厚），而且适用于不同轮廓接触形式和材料特性。该方法在单个载荷工况下的计算成本仅需几毫秒，因此可直接应用于轴承模型中。此外，所提出的方案更像是一种框架，其应用可通过引入不同的薄膜厚度公式和修正因子来扩展，以考虑诸如热效应、剪切变薄效应、表面粗糙度、润滑剂不足等复杂的环境润滑（EHL）行为。 |
| 中文内容为网络AI翻译，专业术语未必准确，仅供参考。 |
京公网安备 11010202009788