With the higher rotational speeds and loads in bearings, the gaseous cavitation becomes more and cannot be ignorable in the bearing designs. However, there is no enough research in non-equilibrium gaseous cavitation model. This paper builds a new gaseous cavitation model based on the Bunsen solubility and bubble dynamics. The equilibrium pressure is calculated by the Bunsen solubility based on the local pressure and its pressure difference with the local pressure decides the cavitation mass transfer rate in this new model for gaseous cavitation. A titling-pad journal bearing at 3000 rpm and under 299 kN load is chosen as the research object with this new model and an original equilibrium model applied. As for the minimum film thickness and bearing force balance, this new model performs in better accordance with the experiment than the equilibrium model. According to the multiphase distributions in the bearing film, the gaseous cavitation rate in this new model can simulate the non-equilibrium processes of dissolution and cavitation under the high rotational speed, which is close to the physical gaseous cavitation process. This new model is developed and applied successfully in tilting-pad journal bearings for simulating the non-equilibrium gaseous cavitation.

随着轴承转速和负载的提高，气穴现象变得越来越多，在轴承设计中不可忽视。然而，对于非平衡气态空化模型的研究还不够。本文基于本生溶解度和气泡动力学建立了一种新的气态空化模型。平衡压力是通过基于局部压力的本生溶解度来计算的，其与局部压力的压差决定了这个新的气态空化模型中的空化传质速率。采用该新模型并应用原始平衡模型，选择转速为 3000 rpm、载荷为 299 kN 的倾斜瓦轴颈轴承作为研究对象。对于最小膜厚和承载力平衡，该新模型比平衡模型更符合实验结果。根据轴承膜中的多相分布，该新模型中的气态空化速率可以模拟高转速下溶解和空化的非平衡过程，接近物理气态空化过程。该新模型被开发并成功应用于可倾瓦径向轴承中，用于模拟非平衡气态空化。