An Experimental Study of Transient Effects in Elastohydrodynamic Lubrication

弹流润滑瞬态效应的实验研究

• 批准号: 2845200
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2845200
• 关键词: Experimental; Study; Transient; Effects; Elastohydrodynamic

Machine elements such as bearings, gears and cams form a key part of almost all mechanical systems including electric motors, wind turbines, internal combustion engines, helicopter gearboxes and EV transmissions to name a few. Reliable and efficient operation of these components is heavily dependent on the existence of thin lubricant films, of the order of 1 micron in thickness, between their rubbing parts. Such films are formed through a phenomenon of elastohydrodynamic (EHD) lubrication. Our understanding of elastohydrodynamic lubrication, and thus our ability to predict EHD film thickness, in contacts operating under steady conditions is well established. However, this is not the case under transient conditions, where the applied load, entrainment speed or lubricant supply changes rapidly. This project aims to use high-speed optical interferometry to investigate the behaviour of the lubricated film under a range of transient conditions.

轴承、齿轮和凸轮等机械元件构成了几乎所有机械系统的关键部分，包括电动机、风力涡轮机、内燃机、直升机变速箱和电动汽车变速箱等。这些部件的可靠和有效操作在很大程度上取决于在它们的摩擦部件之间存在厚度为1微米量级的薄润滑剂膜。这种膜是通过弹性流体动力学（EHD）润滑现象形成的。我们对弹性流体动力润滑的理解，以及我们预测在稳定条件下工作的接触中的EHD膜厚度的能力，已经很好地建立起来。然而，在瞬态条件下情况并非如此，在瞬态条件下，施加的负载、卷吸速度或润滑剂供应迅速变化。该项目旨在使用高速光学干涉测量法来研究润滑膜在一系列瞬态条件下的行为。