Oil leakage and power loss from radial shaft seals used in automotive power transmission systems

在输电系统中，为了防止漏油，经常使用径向轴封。这些部件对于运行可靠性的重要性给行业带来了巨大的挑战。关键表面参数的针对性设计和标准化是至关重要的，例如表面纹理和机器导程角度或轴导程。前者是任何表面的固有特性，通常也称为表面粗糙度，而后者是在轴的制造过程中形成的。效率、有效密封和可靠性这三个经常相互矛盾的目标需要结合数值和实验方法。将创建一个考虑混合润滑区域中的表面相互作用和流体动力流动的数值模型。数值模型将被用来理解潜在的物理原理，并为设计提供信息。同时，将创建一个部件级试验台，以对数值模型进行实验验证，并对新的部件设计进行基准测试。此外，将创建新的标准来表征使用光学干涉仪测量的接触面的波纹度和粗糙度。

Radial shaft seals are frequently used in power transmission systems to prevent oil leakage. The importance of these components for operational reliability provides a great challenge for the industry. Pertinent design and standardisation of key surface parameters such as surface texture and machine lead angle or shaft lead are paramount. The former is an inherent property of any surface, which is also commonly referred to as surface roughness whilst the latter is formed during manufacture of the shafts.The often contradictory objectives of efficiency, effective sealing and reliability require a combined numerical and experimental approach. A numerical model accounting for surface interactions and hydrodynamic flow in the mixed regime of lubrication will be created. The numerical model will be used to understand the underlying physics and inform design. In parallel, a component level test rig will be created to experimentally validate the numerical model and to benchmark new components designs. Additionally, new standards will be created to characterise the waviness and roughness of the contact surfaces measured using optical interferometers.