%A GUO Jiadong*, JIANG Jin, SUN Qiangqiang, LIU Cheng, LIU Laiquan %T Parameters optimization of ear-type floating sleeve in external spur-gear pump %0 Journal Article %D 2019 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.17.0173 %P 289-295 %V 37 %N 4 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_2671.shtml} %8 2019-04-25 %X To reduce the friction among the main gears, driven gears and their end face floating sleeve in external spur-gear pumps, thus enhance the volume efficiency and fatigue life, the mechanism of end wear of gear pump was analyzed firstly, and it was concluded that the unbalance of force and moment of the floating sleeve was the cause of wear. The expression of outboard force and moment were deduced. Based on genetic algorithm, the resultant and resultant moment of the ear-type floating sleeve were taken as objective functions. And the outer diameter, inner diameter, angle and elastic strength of the seal ring on floating sleeve were taken as independent variables. Under the restrained conditions of moment balance and width of seal ring, the values of the independent variables were obtained when the objective function was minimum. At last, numerical simulation was carried out on external spur-gear pump with non-optimized and ear-type floating sleeve. The numerical simulation of gear pump with optimized floating sleeve shows that the resultant force of the floating sleeve is almost zero. Then the rationality of the optimum design of the floating sleeve is verified. The research can provide technical reference for gear pump sealing design.