径向间隙对液环真空泵内流场及其性能影响机理研究  

The Mechanism of Radial Clearance Effect on the Flow Field and Its Performance in Liquid Ring Vacuum Pumps

作　　者：刘华一 赵国勇[1] 孟凡瑞 高瑛琦 许书铭 LIU Huayi;ZHAO Guoyong;MENG Fanrui;GAO Yingqi;XU Shuming(School of Mechanical Engineering,Shandong University of Technology,Zibo 255000,China;Zibo Water Ring Vacuum Pump Factory Co.,Ltd.,Zibo 255200,China)

机构地区：[1]山东理工大学机械工程学院,淄博255000 [2]淄博水环真空泵厂有限公司,淄博255200

出　　处：《真空科学与技术学报》2024年第10期885-891,共7页Chinese Journal of Vacuum Science and Technology

基　　金：山东省自然科学基金重点项目(ZR2020KE060)。

摘　　要：现有大型液环真空泵能耗高、运行效率低下、研发周期长且产品失败率较高。为解决以上问题,文章基于FLUENT仿真软件,针对一种通过旋转泵体来实现径向间隙改变的液环真空泵,建立数学模型;进行外特性测试,验证仿真结果的准确性;探究径向间隙对液环泵内流场气液两相、压力、速度和进出口回流特性的影响机理;通过数值计算,得出径向间隙和叶片包角对吸气量、轴功率及效率的影响规律。结果表明,通过调整径向间隙和叶片包角,可以有效地改善泵内的流动情况,提升吸气效率和整体性能,为新型液环泵研发提供了理论支撑。Existing large liquid ring vacuum pumps have high energy consumption,low operating efficiency,long development cycle and high failure rate.In order to solve the above problems,based on FLUENT simulation software,this paper establishes a mathematical model for a kind of liquid ring vacuum pump that can realize radial clearance change by rotating the pump body,and carries out external characteristic tests to verify the accuracy of the simulation results.To investigate the influence mechanism of different radial clearances on the gas-liquid two-phase,pressure,velocity and inlet/outlet reflux characteristics of the internal flow field of the liquid ring pump,and to derive the influence law of radial clearance and vane wrapping angle on the suction volume,shaft power and efficiency by numerical calculation.The results show that by adjusting the radial clearance and vane wrap angle,the flow situation inside the pump can be effectively improved,and the suction efficiency and overall performance can be enhanced,which provides theoretical support for the research and development of the new liquid ring pump.

关 键 词：液环真空泵 径向间隙 内流场 回流 

分 类 号：TB752.22[一般工业技术—真空技术]