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针对某CVC带钢冷连轧机启动阶段支持辊油膜轴承静压承载能力不足的问题,应用流体润滑理论,建立了轴承倾斜工作下静压承载能力的全润滑系计算模型,分析了轧机压下倾斜、油泵功率和节流器液阻对轴承静压承载性能的影响.计算结果表明,压下倾斜过大会造成轴套与衬套的轴线出现倾斜,进而导致轴承的静压承载能力急剧下降,是造成轴承寿命缩短、连轧机启动频繁失败的根本原因.在实际生产中,限定了轧机压下倾斜设定值上限,增大了润滑油黏度,从而有效提高了轴承的承载能力,机组启动成功率显著提高.
Aiming at the insufficiency of hydrostatic bearing capacity of supporting roller oil film bearing during the start-up phase of a CVC cold strip mill, the full lubrication model of hydrostatic bearing capacity under bearing tilting operation is established by applying fluid lubrication theory. , The influence of the oil pump power and the fluid resistance of the restrictor on the hydrostatic bearing performance of the bearing are calculated.The results show that the axial inclination of the bushing and the bushing caused by the over-inclination of the inclined plane leads to the sharp drop of the hydrostatic bearing capacity of the bearing, and is Resulting in shortened bearing life, even the root causes of frequent failure of the mill.In actual production, the mill limits the upper setpoint of the tilt angle, increasing the viscosity of the lubricating oil, thus effectively increasing the bearing capacity, unit start-up success rate Significantly increased.