磁场强度对水基磁流体滑动轴承弹流润滑性能的影响分析

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The elastohydrodynamic lubrication mathematical model of water-based ferrofluid journal bearing was set up.Considering the temperature in Reynolds equation,the numerical simulation of elastohydrodynamic lubrication property of ferrofluid lubricated journal bearing in magnetic field was carried out with multi-grid method,multi-grid integral method and the scanning method by column.The numerical simulation results were compared in magnetic field and without magnetic field.The influence of magnetic induction on the pressure and film thickness of water-based was discussed.The results show that the film thickness of water-based ferrofluid in magnetic field is increased compared with the water-based ferrofluid without magnetic field,but the magnetic field has very little effect on the pressure;with the increase of the magnetic induction,the film thickness of water-based ferrofluid is increased and pressure does not change largely.建立了磁流体滑动轴承的弹流润滑数学模型,利用考虑热效应的Renolds方程,采用多重网格法、多重网格积分法和逐列扫描法,对磁场作用下的水基磁流体润滑滑动轴承的弹流性能进行数值分析。对比了有无磁场作用下的水基磁流体弹流润滑数值模拟结果,并探讨了磁感应强度对其膜厚和压力的影响。结果表明,在有磁场作用的条件下,不同磁粉体积分数下的水基磁流体的润滑膜膜厚比没有磁场作用时有所增加,但压力没有明显变化;在不同磁感应强度条件下,随着磁感应强度的增加,水基磁流体润滑膜厚增加,压力没有明显变化。