基于FLUENT的静压轴承椭圆腔和扇形腔静止状态流场仿真

对重型立式数控车床工作台静压导轨进行研究,应用三维造型软件Pro/ENG INEER及CFD软件FLUENT,从结构三维造型设计以及内部三维流动分析计算两方面对静压轴承进行了综合分析,并对比了不同形状油腔的流速分布及压力分布,揭示了导轨内部流动规律。结果表明:由于油腔形状不同,导致与上工作台的有效接触面积大小不同,扇形油腔各个方向速度在迭代计算后更容易收敛且更容易趋于稳定,而椭圆形油腔各个方向速度波动性较大;利用CFD技术对液体静压轴承进行三维数值模拟,得到的流场结果与实际吻合,计算结果能够有效反映轴承内的流动状态。

Static Flow Simulation of Hydrostatic Bearing Ellipse and Sector Curve Based on FLUENT

The hydrostatic sliding way of the heavy vertical NC lathe workbench was researched.The hydrostatic bearing was analyzed from 3-D structural design and 3-D flow analysis and calculation by applying the 3D formation software Pro/ENGINEER and the CFD simulation software FLUENT.The flow rule of internal sliding way was obtained by comparing the flow velocity distribution and pressure distribution of the different shape oil curve.The result indicates that the different shapes of oil curve result in the different size of the upper workbench effective contact surface.It is easier for velocity of sector oil curve in every direction to get convergence and stabilization than that of ellipse oil curve which is violent fluctuation in every direction.Applying CFD technology to 3-D value simulation of liquid hydrostatic bearing,the obtained result of simulation is agreed with actual condition.The calculation result is able to reflect the internal liquid state effectively.