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以轧机油膜轴承为研究对象,利用考虑热效应的Relnolds方程建立了油水两相弹流润滑模型,对比了3种常用衬套材料对轧机油膜轴承润滑性能的影响,结合轧机油膜轴承的特殊工况讨论了不同含水量、主轴转速和轧制力下的油水两相流体的润滑特性。结果表明:3种衬套材料中,巴氏合金的最大压力及中心压力最小,整体膜厚、中心膜厚及最小膜厚值最大,润滑性能最好,最大温度最大,散热性最好,选用巴氏合金作为衬套材料最为合适;油膜进水后随着含水量的增加,最大压力减小,润滑膜入口区的压力增大,最小膜厚增大,润滑性能提升;随着主轴转速增加,润滑膜最大压力减小,入口区压力增大,最小膜厚增加;随着轧制力的增加,最大压力增大,入口区压力减小,最小膜厚减小。
Taking the oil film bearing of rolling mill as the research object, the oil-water two-phase model was established by using the Relnolds equation which considered the thermal effect. The effects of three kinds of commonly used lining materials on the lubricating performance of the rolling mill oil film bearing were contrasted. Combining the special working conditions of the rolling mill oil film bearing The lubrication characteristics of oil-water two-phase fluid with different water content, spindle speed and rolling force were obtained. The results show that the maximum pressure and the center pressure of the three kinds of lining materials are the smallest, and the whole film thickness, the center film thickness and the minimum film thickness value are the largest, the lubricating properties are the best, the maximum temperature is the maximum, the heat dissipation is the best Babbitt alloy is most suitable as a lining material; as the water content increases, the maximum pressure decreases, the pressure in the lubricating film entrance area increases, the minimum film thickness increases, and the lubrication performance improves; as the spindle speed increases , The maximum pressure of lubricating film decreases, the pressure in inlet zone increases and the minimum film thickness increases. With the increase of rolling force, the maximum pressure increases and the pressure in inlet zone decreases and the minimum film thickness decreases.