| 转子径长比对凸轮泵性能影响的数值模拟与试验 |
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| 引用本文： | 黎义斌,郭东升,唐拥林,杜俊.转子径长比对凸轮泵性能影响的数值模拟与试验[J].振动与冲击,2020,39(9):194-200. |
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| 作者姓名： | 黎义斌 郭东升 唐拥林 杜俊 |
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| 作者单位： | 1.兰州理工大学 能源与动力工程学院，兰州730050；
2.广东机电职业技术学院，广州510515 |
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| 基金项目： | 温州市科技计划项目(G20190017);国家自然科学基金(51866009)。 |
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| 摘 要： | 为了揭示径长比对凸轮泵性能参数的影响规律,建立不同径长比与凸轮泵特性曲线之间的定量关系,并获得轴系径向载荷分布特性,从而为凸轮泵轴系强度计算提供依据。基于FLUENT动网格技术和RNG k-ε湍流模型对凸轮泵进行三维瞬态流场数值计算,比较了6种不同径长比凸轮泵的流量特性。结果表明:径长比对凸轮泵性能有显著的影响,随着转子径长比的逐渐增大,凸轮泵出口流量脉动呈逐渐下降的趋势,且出口流量值先增大后减小;转子所受径向力的大小和方向均随转子转动呈周期性变化,且大小随径长比的增大而减小,随泵出口压力的增大而增大。数值计算表明当转子径长比α取值为0.7~1.3时,泵出口平均流量达到峰值区,同时泵出口流量脉动幅值最低,转子受力较好。研究结论为凸轮泵转子径长比的选择提供了理论依据。
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| 关 键 词： | 凸轮泵 径长比 径向激励力 流量脉动 数值计算 |
Effect of the rotor diameter-length ratio on the rotary lobe pump performance based on numerical simulations and experimental tests |
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| LI Yibin,GUO Dongsheng,TANG Yonglin,DU Jun.Effect of the rotor diameter-length ratio on the rotary lobe pump performance based on numerical simulations and experimental tests[J].Journal of Vibration and Shock,2020,39(9):194-200. |
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| Authors: | LI Yibin GUO Dongsheng TANG Yonglin DU Jun |
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| Affiliation: | 1.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China；
2.Guangdong Mechanical and Electronical college of Technology, Guangzhou 510515, China |
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| Abstract: | The purpose of the paper is to reveal the influence of the rotor diameter-length ratio on the performance parameter of a kind of rotary lobe pump, to establish a quantitative relationship between the diameter-length ratio and the characteristic curve of the rotary lobe pump and to obtain the radial load distribution characteristics of the shaft system so as to provide a basis for the calculation of the shafting strength of the rotary lobe pump.Based on the FLUENT dynamic mesh and the RNG k-ε turbulence model, the numerical calculation of the 3D transient flow in the rotary lobe pump was carried out.The flow characteristics of
rotary lobe pumps with six different kinds of diameter-length ratio
were compared, and the influence of the diameter-length ratio on the radial exciting force of the pump rotor was revealed.The results show that the diameter-length ratio has a significant influence on the performance of the rotary lobe pump.With the increase of the diameter-length ratio, the flow pulsation gradually decreases, and the outlet flow increases first and then decreases.The magnitude and direction of the radial force are changed periodically with the rotation of the rotor.The force decreases with the increase of diameter-length ratio, and increases with the increase of pump outlet pressure, which is independent of rotational speed.When the diameter-length ratio is from 0.7 to 1.3, the average volume flows at the outlet reaches the peak area, and the flow pulsation amplitude at the pump outlet is the lowest, meanwhile, the rotor’s force state is better.The results provide a theoretical basis for selecting the diameter-length ratio of rotary lobe pumps. |
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| Keywords: | rotary lobe pump diameter-length ratio radial exciting force flow pulsation numerical simulation |
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