滚动轴承腔内气液固三相流场数值模拟

Numerical Simulation of Gas-Liquid-Solid Three-Phase Flow Field in Rolling Bearing Cavity

为了研究高速轴承内气液固三相流动状态,基于VOF模型和DPM模型,建立三维轴承腔多相流模型,在考虑接触角及石墨烯含量的条件下,分析不同进气速度、转速下轴承腔内液固两相分布状态。结果表明:轴承外圈滚道润滑油膜形成与转速和进气速度有关;不同工况下,进入轴承腔内的石墨烯数量不同,随着转速的提高,石墨烯在轴承腔内沿周向的扩散速度加快,进气速度的提高使得石墨烯沿轴向扩散的速度增加。在转速为9000 r/min时,润滑油易生成较为均匀的润滑油膜。

In order to study the gas-liquid-solid three-phase flow state in high-speed bearings,based on the VOF model and DPM model,a three-dimensional bearing cavity multiphase flow model was established,and the liquid-solid two-phase distribution state in the bearing cavity was analyzed at different intake speeds and speeds under the conditions of considering the contact angle and graphene content.The results show that the formation of lubricating oil film in the raceway of the outer ring of the bearing is related to the rotation speed and the intake speed;under different working conditions,the amount of graphene entering the bearing cavity is different;as the speed increases,the diffusion speed of graphene in the bearing cavity in the circumferential direction increases,and the increase in air intake speed increases the speed of graphene diffusion in the axial direction.When the rotation speed is 9000 r/min,the lubricating oil is easy to form a relatively uniform lubricating oil film.