转子槽形结构对离心泵水力特性及压力脉动影响研究  

Influence of Rotor Groove Structure on Hydraulic Characteristics and Pressure Pulsation of Centrifugal Pump

作　　者：柴博[1] 董浩 李文华 CHAI Bo;DONG Hao;LI Wenhua(School of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China)

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《机械科学与技术》2022年第7期1023-1030,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：辽宁省教育厅2019年服务地方类项目(300219074)。

摘　　要：为提高航空领域小型高转速离心泵的水力性能,减轻重量并简化机械结构,且具备更好的轴向力平衡能力,设计一种新型单级小比转数转子槽形结构离心泵。搭建离心泵水力性能实验台,研究不同工况下槽形结构对离心泵水力性能及压力脉动的影响,并结合数值模拟对比分析。研究表明:转子槽形结构的离心泵与传统离心泵相比,出口压力、扬程、有效功率分别提升了约7.89%、7.53%、11.1%。实验与数值模拟分析在额定工况下的出口压力、扬程、有效功率误差均小于1.5%,临界空化余量为1.488 m,压力脉动总体幅值小于0.2,且峰值发生在了叶轮2倍频附近。验证了高速小比转数离心泵电机转子上引入螺旋槽结构设计是合理的。In order to improve the hydraulic performance of small high speed centrifugal pump in aviation field,reduce its weight and simplify its mechanical structure,and have better axial force balance ability,a new type of centrifugal pump with single stage small specific revolution rotor groove structure was designed.The hydraulic performance test bench of centrifugal pump was set up to study the influence of groove structure on hydraulic performance and pressure fluctuation of centrifugal pump under different working conditions,and the numerical simulation was compared and analyzed.The results show that compared with the traditional centrifugal pump,the outlet pressure,head and effective power of the rotor groove centrifugal pump are increased by 7.89%,7.53%and 11.1%,respectively.The experimental and numerical simulation results show that the errors of outlet pressure,head and effective power are all less than 1.5%,the critical cavitation margin is 1.488 m,and the overall pressure pulsation amplitude is less than 0.2,and the peak value occurs near the impeller frequency twice.It is proved that it is reasonable to introduce spiral groove into rotor of high speed small specific revolution centrifugal pump motor.

关 键 词：离心泵 转子槽形结构 数值模拟 水力性能 压力脉动 

分 类 号：TG156[金属学及工艺—热处理]