Abstract Due to high requirements on the shaft counter-surface of radial shaft seals, the state of the art manufacturing process typically consists of pre-turning, case hardening and plunge grinding. Investigations of alternative surface finishing processes such as shot peening or rolling have shown a significant reduction of friction in the sealing contact compared to ground surfaces. In this paper, a new surface treatment process for such shaft seal counter surfaces is investigated and compared to shot peened and conventionally plunge ground surfaces regarding friction, shaft wear, sealing function and reverse pumping. The process is a modification of a cold spraying process, where microscale particles are used as shot material, which are intended to dent the surface and create small hydrodynamically active structures without sticking to the surface and can therefore be understood as micro shot peening of the surface. Results show a significant reduction in wear and friction compared to ground surfaces.

中文翻译：

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使用实验性微喷丸和经典喷丸工艺改善径向轴密封配合面的摩擦学性能

摘要 由于径向轴密封件对轴配合面的要求很高，最先进的制造工艺通常包括预车削、表面硬化和切入磨削。对替代表面精加工工艺（如喷丸硬化或滚压）的研究表明，与地面相比，密封接触中的摩擦显着减少。在本文中，研究了这种轴密封反面的新表面处理工艺，并在摩擦、轴磨损、密封功能和反向泵送方面与喷丸处理和传统的切入式研磨表面进行了比较。该工艺是对冷喷涂工艺的改进，其中使用微米级颗粒作为喷丸材料，其旨在使表面凹陷并产生小的流体动力学活性结构而不粘附在表面上，因此可以理解为表面的微喷丸硬化。结果表明，与地面相比，磨损和摩擦显着减少。