有限体积法与正交试验法相结合的动静压轴承结构优化设计  

Structure Optimization Design of Hydrostatic-dynamic Journal Combined Finite Volume Method with Orthogonal Experimental Design Method

作　　者：孟曙光[1] 熊万里[1] 王少力[1] 吕浪[1] 郑良钢 

机构地区：[1]湖南大学国家高效磨削工程技术研究中心,长沙410082 [2]湖南海捷主轴科技有限公司,长沙410082

出　　处：《中国机械工程》2016年第9期1234-1242,共9页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51275163);湖南省自然科学杰出青年基金资助项目(12JJ1006)

摘　　要：针对小孔节流深浅腔动静压轴承的性能优化问题,基于平行平板扩散流动计算模型及流量守恒原理,推导了微元控制体边界压力的插值函数,提出了分析小孔节流深浅腔动静压轴承的油腔压力、承载力、静刚度、进油流量及温升等承载特性的有限体积计算方法。使用该方法研究了供油压力、主轴转速、进油孔径、浅腔深度、初始油膜厚度等参数对小孔节流深浅腔动静压轴承承载特性的影响规律,从而得到了以上相关参数的优化区间。在此基础上,采用四因素三水平的正交试验法,在满足多目标性能最优的前提下,得到了小孔节流深浅腔动静压轴承结构参数与工作参数的最优组合。以该组参数试制了小孔节流深浅腔动静压轴承并建立了试验平台,测量了不同转速及供油压力下油腔的压力值。试验结果表明,轴承油腔压力试验数据及理论计算值随主轴转速的变化趋势一致;误差在11%以内。验证了有限体积法与正交试验法相结合的动静压轴承结构优化设计方法的正确性。Due to the problem of operating performance optimization of hydrodynamic-static hybrid journal with orifice restrictor,based on the calculation model of parallel plate diffusion flow and the principles of flow conservation,a interpolation function of the boundary pressure for the micro control volume was derived. A method belonged to the finite volume method was proposed to calculate the characteristics for a kind of deepshallow recess bearing,including load capacity,bearing stiffness,flow rate and temperature ascending relationship. The method was used to study bearing characteristics with different structure parameters and working parameters,such as supply pressure,spindle speed,oil inlet aperture,shallow depth and initial oil film thickness.Then,the optimization ranges of the above parameters were obtained. Under the preconditions of satisfying multi-objective optimization,the optimal combination of the structural parameters and operating parameters of the bearing was deduced,using a orthogonal experimental design method which named four factors three levels. The deep-shallow bearings with orifice restrictors were trial by the optimal parameters,and an experimental platform was established. The pressure values of oil cavity were measured with different rotational speed and supplying pressure. The results show that the trend of experimental data and numerical simulation results for spindle speed are consistent,and the error is within 11%. The reliability of the structure optimization design method for the deep-shallow bearings with orifice restrictors is verified,which combines the finite volume method with orthogonal experimental method.

关 键 词：有限体积法 正交试验法 小孔节流 深浅腔动静压轴承 承载特性 结构优化 

分 类 号：TH133.31[机械工程—机械制造及自动化]