凸轮泵的理论计算及模拟  

Lobe Pump Theoretical Calculations and Simulation

作　　者：贾琨[1] 黎义斌[2] 孟庆武 沈浩[1] 

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050 [2]兰州理工大学能动学院,甘肃兰州730050 [3]济南优科精流机械设备有限公司,山东济南250021

出　　处：《机械设计与制造》2014年第8期65-68,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51269011);国家科技支撑计划资助项目(2013BAF01B02)

摘　　要：针对凸轮泵两叶或三叶转子,介绍了由圆弧—共轭曲线组成的转子型线,根据啮合特性及几何原理建立其型线的参数方程,并建立二维模型。通过模拟软件Fluent,导入UDF文件使两个转子同步反向旋转,采用动网格技术和湍流模型对凸轮泵模拟分析,可得结论:叶谷为圆弧、叶峰为共轭曲线的转子模型较好;在转子的节圆半径相同的前提下,转子为两叶的凸轮泵输出的流量大,但呈现的波动很剧烈,而三叶的凸轮泵输出流量小,但较为平稳。并通过试验验证其模拟的正确性。Aimed at lobe pump two or three blades rotor, it introduced a rotor profile made up with a circle and conjugate curve. According to meshing characteristics and geometric principles, parameter equation of rotor profile and 2D model was built. With CFD software Fluent, it imports the UDFfile and make two rotors synchronous reverse rotation, and used the dynamic meshes and turbulent model to simulate the lobe pump. The result shows that, the blade valley is circle and blade peak is conjugate which has great property. When the circle radius of rotors are the same, two blades lobe pump has large output flow but the fluctuating is shock. The Three blades lobe pump has low output flow and has good stability. The simulation results are conforming to experiments.

关 键 词：凸轮泵 共轭曲线 数值模拟 动网格 

分 类 号：TH16[机械工程—机械制造及自动化] TH326