【摘要】 以用于某高精度数控车床主轴部件的深浅腔液体动静压轴承为研究对象,在对其进行理论建模与分析的基础上,采用计算流体力学软件对深浅腔动静压轴承油膜特性进行分析.分析不同的转速、供油压力、偏心率、油膜厚度和深腔夹角等因素对油膜承载力、进油孔流量和油膜温升的影响.结果表明:进油孔流量随主轴转速的增加先增大后减小,随主轴偏心率的增加逐渐减小;油膜温度随外部供油压力的增加逐渐减小且趋于平缓;油膜厚度在0. 03 mm左右时承载力和温升最合适;在深腔夹角为10°时,油膜的动压效果最明显,油膜承载能力最强.更多还原

【Abstract】 The deep-shallowpocket hybrid bearing of spindle assembly of the high precision CNC lathe was taken as the object,the computational fluid dynamics software was used to analyze oil film characteristics of deep and shallowpocket hybrid bearing on the basis of theoretical modeling and analysis. The influence of speed,oil pressure,eccentricity,oil film thickness and angle of deep pocket on the bearing capacity,flowand temperature rise of the oil film were analyzed.The results showed that the flowof the oil inlet hole increases first and then decreases with the increase of the spindle speed,and gradually decreases with the increase of the eccentricity of the spindle. The oil film temperature gradually decreases with the increase of the external oil supply pressure and tends to be gentle. When the oil film thickness is about 0. 03 mm,the bearing capacity and temperature rise are most suitable. When the angle of the deep cavity is 10°,the dynamic pressure effect of the oil film is the most obvious,and the oil film bearing capacity is the strongest.更多还原