基于流固耦合的双叶片潜污泵转子动力学特性分析  

Rotor Dynamic Characteristics of Double-Blade Submersible Sewage Pump Based on Fluid-Structure Interaction

作　　者：宋冬梅 刘雪垠 陈小明 曾梦玮 徐成芝 曾浪令 张衡镜 SONG Dong-mei;LIU Xue-yin;CHEN Xiao-ming;ZENG Meng-wei;XU Cheng-zhi;ZENG Lang-ling;ZHANG Heng-jing(Sichuan Provincial Machinery Research&Design Institute Group Co.,Ltd,Chengdu 610063,Sichuan,China;School of Energy and Power Engineering,Xihua University,Chengdu 610039,Sichuan,China)

机构地区：[1]四川省机械研究设计院(集团)有限公司,四川成都610063 [2]西华大学能源与动力工程学院,四川成都610039

出　　处：《机械研究与应用》2023年第4期6-8,12,共4页Mechanical Research & Application

基　　金：四川省科技计划-科研院所成果转化项目:直驱式高速离心泵研制及应用(编号:2022JDZH0011)。

摘　　要：为了研究双叶片潜污泵转子系统的动力学特性,该文基于流固耦合理论,采用ANSYS-CFX和ANSYS-Workbench软件对某型号潜污泵转子系统“干湿态”下固有频率和振型、临界转速进行了数值分析。结果表明:转子振型多为振摆以及扭转摆动,前两阶模态振型均表现为叶轮的对称左右摆动,最大位移都出现在叶轮轮缘区域和叶片出口区域。“湿态”下潜污泵转子固有频率比干态下有所降低,最小下降率2.8%,出现在第二阶模态;最大下降率21.3%,出现在第六阶模态。“湿态”下转子临界转速比“干态”下临界转速稍有下降。转子工作转速1 470 r/min远小于计算所得的前四阶临界转速,不会发生共振。In order to study the rotor dynamic characteristics of the double-blade submersible sewage pump,the ANSYS-CFX and ANSYS-Workbench are used to conduct numerical analysis of the natural frequency,mode shape and critical speed of the rotor system of a certain type of submersible sewage pump in dry and wet mode based on fluid structure coupling.The results show that most of the rotor vibration modes are swing and torsional oscillation;the first two orders are symmetric left and right oscillation of the impeller,and the maximum displacement occurrs in the impeller rim area and blade outlet area.The natural frequency of submersible sewage pump rotor in wet mode is lower than that in dry mode,with a minimum drop rate of 2.8%,which appears in the second order;the maximum drop rate is 21.3%,which occurrs in the sixth order.The critical speed of rotor in wet mode is slightly lower than that in dry mode.The working speed of the rotor is much less than the first four orders critical speeds of the rotor.It indicates that the rotor system would not resonate when operating at working speed.

关 键 词：双叶片潜污泵 数值模拟 流固耦合 模态分析 临界转速 

分 类 号：TH311[机械工程—机械制造及自动化]