转子叶数对转子泵性能影响研究
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摘要
针对目前国内在研究转子泵时只对单一模型进行分析的不足,建立不同叶数的多个转子泵模型进行对比分析。由Pro/E参数方程生成转子的二维轮廓,再导入到AutoCAD中绘制出转子泵的二维模型,通过ICEM进行网格划分后,最后导入到Fluent进行边界条件的设置和瞬态计算。分析了不同转速、不同进出口压差以及不同粘度下转子泵内的流场分布和出口质量流量,可以得到:在其它条件相同时转子泵容积效率随进出口压差的增大而减小;转子泵容积效率随转速的增大而增大;转子泵容积效率对低粘度介质比对高粘度介质敏感;多叶转子在泵高速运行时会使转子泵总体容积效率下降。
Aiming at solving the shortcomings of the single model in the study of the rotor pump,a number of rotor pump models with different leaf numbers were compared and analyzed.The 2 D profile of the rotor is generated by the Pro/E parametric equation,then the 2 D model of the rotor pump is drawn by the software—AutoCAD. The mesh is divided by the ICEM and finally imported into the software—Fluent. After the boundary conditions are set,then we can calculate the model by Fluent underdifferent speed,different inlet and outlet pressure difference and the different viscosity of the rotor pump. The results show that the rotor pump pressure decreases with the increase of the inlet and outlet pressure difference. The volumetric efficiency of the rotor pump increases with the increase of the rotational speed. The rotor pump volumetric efficiency is sensitive to the low viscosity medium than to the high viscosity medium. The multi-blade rotor will decrease the volumetric efficiency of the pump when the pump is running at high speed.
Aiming at solving the shortcomings of the single model in the study of the rotor pump,a number of rotor pump models with different leaf numbers were compared and analyzed.The 2 D profile of the rotor is generated by the Pro/E parametric equation,then the 2 D model of the rotor pump is drawn by the software—AutoCAD. The mesh is divided by the ICEM and finally imported into the software—Fluent. After the boundary conditions are set,then we can calculate the model by Fluent underdifferent speed,different inlet and outlet pressure difference and the different viscosity of the rotor pump. The results show that the rotor pump pressure decreases with the increase of the inlet and outlet pressure difference. The volumetric efficiency of the rotor pump increases with the increase of the rotational speed. The rotor pump volumetric efficiency is sensitive to the low viscosity medium than to the high viscosity medium. The multi-blade rotor will decrease the volumetric efficiency of the pump when the pump is running at high speed.
引文
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[4]沈浩,贾琨,黎义斌.凸轮泵转子型线优化设计及模拟计算[J].兰州理工大学学报,2014(3):44-48.(Shen Hao,Jia Kun,Li Yi-bin.Optimum design and simulation of rotorprofile of cam pump[J].Journal of Lanzhou University of Technology,2014(3):44-48.)
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[10]杜旭明.转子泵转子型线的设计研究[D].兰州:兰州理工大学,2012.(Du Xu-ming.Research on the rotor profile of rotor pump[D].Lanzhou:Lanzhou University of Tchnology,2012.)
[2]李昳,姜小军,钱浩海.黏度对凸轮转子泵效率影响的数值分析[J].排灌机械工程学报,2014(8):669-673.(Li Yi,Jiang Xiao-jun,Qian Hao-hai.Numerical analysis of the effect ofviscosity on the efficiency of cam rotor pump[J].Journal of Drainageand Irrigation Machinery Engineering,2014(8):669-673.)
[3]李扬辉,张志臣.流体在凸轮转子泵腔内运动有限元分析[J].机械制造,2014(3):32-35.(Li Yang-hui,Zhang Zhi-cheng.Finite element analysis of fluid flow inthe cavity of cam rotor pump[J].Machine Building,2014(3):32-35.)
[4]沈浩,贾琨,黎义斌.凸轮泵转子型线优化设计及模拟计算[J].兰州理工大学学报,2014(3):44-48.(Shen Hao,Jia Kun,Li Yi-bin.Optimum design and simulation of rotorprofile of cam pump[J].Journal of Lanzhou University of Technology,2014(3):44-48.)
[5]Eggert H.Rotary lobe pumps run like clockwork[J].World Pumps,2011,2011(10):34-35.
[6]Shih-His Tong,Daniel C.H.Yang.Rotor profiles synthesis for lobe pumpswith given flow rate functions[J].Journal of Mechanical Design,2005,127(2):287-294.
[7]Huber N,Aktaa J.Dynamic finite element analysis of a micro lobe pump[J].Microsystem Technologies,2003,9(6-7):465-469.
[8]唐善华.凸轮泵转子型线设计与性能分析[J].武汉大学学报:工学版,2007(3):76-79.(THANG Shan-hua.Design and performance analysis of rotor profile ofcam pump[J].Department of Mechanical Engineering:Wuhan Unive-rsity of Technology,2007(3):76-79.)
[9]往复泵设计编写组编.往复泵设计[M].北京:机械工业出版社,1987.(Reciprocating Pump Design Write Groups[M].Beijing:Mechanical In-dustry Press,1987.)
[10]杜旭明.转子泵转子型线的设计研究[D].兰州:兰州理工大学,2012.(Du Xu-ming.Research on the rotor profile of rotor pump[D].Lanzhou:Lanzhou University of Tchnology,2012.)