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.
