Parameters optimization of ear-type floating sleeve in external spur-gear pump
GUO Jiadong1*, JIANG Jin2, SUN Qiangqiang1, LIU Cheng1, LIU Laiquan1
1. School of Power and Mechanical Engineering, Wuhan University, Wuhan, Hubei 430072, China; 2. The Laboratory of Transients in Hydraulic Machinery, the Key Laboratory of Ministry of Education, Wuhan University, Wuhan, Hubei 430072, China
Abstract：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.
[1]李玉龙,孙付春.中高压外啮合齿轮泵端面间隙的理论计算[J].排灌机械工程学报,2012,30(2):148-152. LI Yulong,SUN Fuchun. Theoretical calculation of axial clearance in medium or high pressure external gear pumps[J].Journal of drainage and irrigation machinery engineering,2012,30(2):148-152.(in Chinese)[2]DALPIAZ G, FERNANDEZ D A, MUCCHI E. Mo-deling meshing phenomena in gear pumps[C]// Proceedings of the 2004 International Conference on Noise and Vibration Engineering, ISMA. Leuven, Belgium:Katholieke Universiteit Leuven, 2004:949-963.[3]MUCCHI E,D’ELIA G,DALPIAZ G. Simulation of the running in process in external gear pumps and experimental verification[J]. Meccanica, 2012, 47(3):621-637.[4]CASTILLA R, WOJCIECHOWSKI J, GAMEZ-MONTERO P J, et al. Analysis of the turbulence in the suction chamber of an external gear pump using Time Resolved Particle Image Velocimetry[J]. Flow measure-ment & instrumentation, 2008, 19(6):377-384.[5]刘巍,王安麟,单学文,等.齿轮泵浮动侧板端面密封失效机理分析验证[J].同济大学学报(自然科学版),2015,43(2):299-304. LIU Wei,WANG Anlin,SHAN Xuewen,et al. Failure mechanism analysis and validation of gear-pump floating end-plate face seal [J]. Journal of Tongji University(natural science),2015,43(2):299-304.(in Chinese)[6]王安麟, 张小路, 刘巍,等. 齿轮泵轴向浮动侧板力矩平衡机制改进[J]. 同济大学学报(自然科学版), 2013, 41(10):1579-1583. WANG Anlin, ZHANG Xiaolu, LIU Wei, et al. Moment balance mechanism of gear pump′s axial floating wear plate [J]. Journal of Tongji University(natural science), 2013, 41(10):1579-1583.[7]ZHU Z, ZHANG F, LI C, et al. Genetic algorithm optimization applied to the fuel supply parameters of diesel engines working at plateau ☆[J]. Applied energy, 2015, 157:789-797.[8]ZOU Y, ZHANG Y. Improved multi-objective genetic algorithm based on parallel hybrid evolutionary theory [J]. Environmental science & technology, 2015, 34(3):134-133.[9]李健. 基于遗传算法的混合动力集装箱装载机控制策略研究[D]. 重庆:重庆大学, 2015.[10]石丽娜,陈志平,章序文,等.基于动网格的高压煤浆输送泵内部流场数值模拟优化研究[J].高校化学工程学报,2012,26(3):403-411. SHI Lina,CHEN Zhiping,ZHANG Xuwen,et al. Numeri-cal simulation and optimization of internal flow field in the high pressure coal conveying pump based on the dynamic mesh[J].Journal of chemical engineering of Chinese universities,2012,26(3):403-411.(in Chinese)[11]张德胜,施卫东,张华,等.不同湍流模型在轴流泵性能预测中的应用[J].农业工程学报,2012,28(1):66-71. ZHANG Desheng,SHI Weidong,ZHANG Hua,et al. Application of different turbulence models for predicting performance of axial flow pump [J]. Transactions of the CSAE,2012,28(1):66-71.(in Chinese)[12]叶志烜,胡春艳,刘建峰,等.基于动网格的蝶阀启闭过程的数值模拟研究[J].流体机械,2018,46(4):29-33. YE Zhixuan,HU Chunyan,LIU Jianfeng,et al. Nume-rical simulation and research on opening and closing process of butterfly valve based on dynamic mesh[J].Fluid machinery,2018,46(4):29-33.(in Chinese)[13]JIANG Z,LIANG Z,TANG Y,et al. Numerical simulation and experimental study of the hydrodynamics of a modeled reef located within a current [J].Chinese journal of oceanology and limnology,2010,28(2):267-273.
