Abstract Typically, film formation in a rotary lip seal is explained by microscopic effects, but here it will be explained from a macroscopic point of view. When the nominal parallelism between the shaft and the seal is lost, the contact area is distorted leading to a skewed sealing profile. The resultant slanted gap between the shaft and the seal presents a macroscopic wedge profile in the direction of rotation, hence constituting a source of hydrodynamics. An elastohydrodynamic model is developed predicting the implications of operating a rotary lip seal under misalignment. It is concluded that the non-concentric operation of rotary lip seals leads to a bidirectional fluid migration from the back to the spring side of the seal and vice versa.

中文翻译：

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旋转唇形密封中错位引起的宏观弹性流体动力润滑

摘要 通常，旋转唇形密封件中的成膜是通过微观效应来解释的，但这里将从宏观的角度来解释。当轴和密封件之间的标称平行度丢失时，接触区域会扭曲，导致密封轮廓倾斜。由此产生的轴和密封件之间的倾斜间隙在旋转方向上呈现出宏观的楔形轮廓，因此构成了流体动力学的来源。开发了一个弹性流体动力学模型，用于预测在未对准情况下操作旋转唇形密封件的影响。得出的结论是，旋转唇形密封件的非同心操作导致流体从密封件的背面向弹簧侧双向迁移，反之亦然。