Abstract:

The performances  of liquid hybrid bearing affect directly grinding performances of the whole roll grinder.Aiming at a kind of adjustable liquid hybrid bearing in grinding head of high-speed roll  grinder,its structural characteristics and working principles were  analyzed, and its structural dimensions and working parameters  were  calculated.Then,the lowest total power loss per unit loading capacity was regarded as an objective function of optimization design, and optimization design of the bearing was performed  based on genetic algorithm.Optimization results are as follows:objective  function value decreases from 0.0808  to  0.0678,total power loss of the bearing decreases from 766.9W to 642.6W,and  power consumption is reduced about 16%;moreover,structural dimensions of the bearing are reduced,and its stiffness is obviously  improved.Therefore,through the optimization design,manufacturing cost of the bearing is reduced,and  its comprehensive performances are improved obviously.

Key words: high-speed , roll grinder;liquid , hybrid , bearing;optimization design;genetic algorithm

摘要：

液体动静压轴承性能的好坏直接影响着整台磨床的磨削性能。针对一种可调节式的高速轧辊磨床磨头液体动静压轴承，分析了其结构特点和工作原理，并对其结构尺寸和工作参数进行了设计计算。在此基础上，以单位承载量下的总功率损失最小作为优化设计的目标函数，运用遗传算法对该轴承进行了优化设计。优化结果表明：优化后目标函数值从0.0808下降到0.0678，轴承的总功率损失由初始设计的766.9W降低为642.6W，功耗降低约16%，而且轴承的结构尺寸得到减小，其刚度亦得到明显的提高。由此可见，通过优化设计，不仅降低了轴承的制造成本，而且明显改善了轴承的综合性能。

关键词: 高速轧辊磨床, 液体动静压轴承, 优化设计, 遗传算法