西安理工大学学报2016，Vol.32Issue(4)：392-398,7.DOI:10.19322/j.cnki.issn.1006-4710.2016.04.003
微型动压气体止推轴承表面凹槽织构的参数优化
Parameter optimization of groove surface texture in micro aerodynamic thrust bearings
摘要
Abstract
The axisymmetrical parabolic grooves are designed on the surface of thrust pad to im-prove the lubrication performance of micro aerodynamic thrust bearings.In order to maximize the load-carrying capacity,a hybrid optimization method is developed based on the multi-obj ective particle swarm search algorithm and sequential quadratic programming.In addition,the hybrid optimization method coupled with CFD code is used to implement geometry parametric optimiza-tion of parabolic grooves in micro aerodynamic thrust bearings.The influences of convergence ra-tio,width-to-diameter ratio,outlet height of gas film and velocity of rotor on the Pareto front are investigated.The relative depth,area ratio,untextured outlet length and the number of grooves on the pressure distribution and load-carrying capacity are also analyzed.Results show that the load-carrying capacity is an increasing function of width-to-diameter ratio and area ratio of groove.The load-carrying capacity is improved for the bearing with optimal parameters,with the improvement being more significant under the condition of small convergence ratio;the untex-tured outlet length and relative depth have a great influence on pressure distribution of the thrust bearing;there exists the optimal number of the grooves with the maximum load-carrying capaci-ty.关键词
气体动压止推轴承/表面织构/粒子群算法/多目标优化Key words
micro aerodynamic thrust bearing/surface texture/particle swarm optimization (PSO)algorithm/multi-obj ective optimization分类
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刘成,吕延军,张永芳,杨莎莎,刘万万..微型动压气体止推轴承表面凹槽织构的参数优化[J].西安理工大学学报,2016,32(4):392-398,7.基金项目
国家自然科学基金资助项目（51505375）；陕西省自然科学基金资助项目（2014JM2-5082）；陕西省教育厅科学研究计划资助项目 （）
