Abstract The film thickness in grease lubricated bearings is usually calculated by assuming fully flooded conditions, using the base oil properties. This paper shows that, for sealed-for-life bearings, starvation already occurs at relatively low speeds, where the film thickness could be described by the product of speed, viscosity and Hertzian semi-contact width. It is shown that replenishment is not significant on the tracks in-between the balls but that it is a local phenomenon. The relation between film thickness and the product of speed, viscosity and contact size is different from what is found in single contacts. The film thickness decreases as a function of speed and viscosity, but the effect is only small leading to an almost constant film thickness with increasing product of viscosity and speed.

中文翻译：

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润滑脂润滑球轴承中 EHL 触点的补充

摘要 脂润滑轴承的油膜厚度通常是通过假设完全浸没的条件，使用基础油的特性来计算的。本文表明，对于终生密封轴承，在相对较低的速度下已经发生饥饿，其中油膜厚度可以通过速度、粘度和赫兹半接触宽度的乘积来描述。结果表明，补给在球之间的轨道上并不显着，但它是一种局部现象。薄膜厚度与速度、粘度和接触尺寸的乘积之间的关系与在单接触中发现的不同。薄膜厚度随速度和粘度的变化而减小，但影响很小，随着粘度和速度的乘积增加，薄膜厚度几乎保持不变。