论文部分内容阅读
为揭示液体黏性传动摩擦副变形后油膜的压力分布特点,构建变形油膜三维物理模型,利用计算流体动力学(CFD)原理,采用有限体积法(VOF)进行求解,并与变形前进行对比分析。研究结果表明:摩擦副变形后,油膜静压、动压和总压均大于变形前;油膜静压沿径向递减,沿油膜厚度方向几乎不变,油膜外径局部区域出现负压;油膜动压沿径向递增,且变形后动压效应明显增大,离摩擦片越近动压力越大;总压沿径向递减,受动压效应的影响,周向最大总压出现在沟槽处;摩擦副变形后,沟槽处的总压明显大于无沟槽区,沿油膜厚度方向压力梯度明显大于变形前。
In order to reveal the pressure distribution characteristics of the oil film after the deformation of the liquid friction drive pair, a three-dimensional physical model of the deformation oil film was constructed. The finite element method (VOF) was applied to calculate the three-dimensional physical model of the deformation oil film. . The results show that the hydrostatic pressure, dynamic pressure and total pressure of the oil film are larger than those before the deformation. The hydrostatic pressure of the oil film decreases along the radial direction and almost does not change along the thickness of the oil film. The pressure increases along the radial direction, and the dynamic pressure effect increases obviously after deformation, and the dynamic pressure becomes larger from the friction plate. The total pressure decreases along the radial direction, and the maximum total pressure in the circumferential direction appears at the groove After the friction pair deform, the total pressure at the groove is obviously larger than that without groove, and the pressure gradient along the thickness of the oil film is obviously larger than that before deformation.