万吨级反渗透海水淡化高压泵级数的优化选择  

Optimal selection for stage number of high pressure multi-stage pump for 10 k ton-scale reverse osmosis desalination systems

作　　者：胡敬宁[1] 江伟[1] 叶晓琰[1] 刘三华[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心．江苏镇江212013

出　　处：《排灌机械工程学报》2010年第1期43-46,87,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：“十一五”国家科技支撑计划项目(2006BAB03A02);江苏省高技术研究计划立项项目(BG2006024)

摘　　要：反渗透海水淡化高压多级离心泵为新型轴向吸入节段式多级泵.为了提高其效率以及转子系统的稳定性,利用ANSYS有限元分析软件,对不同级数的海水淡化多级泵转子-轴承系统进行了模态分析,计算了转子系统的临界速度,研究了临界转速与级数的关系以及对数衰减率与级数的关系,并结合多级泵效率与级数的关系,讨论了海水淡化高压泵级数的最优选择.综合转子系统的稳定性和效率两方面因素,海水淡化用高压多级泵选用6级较为合适.可为设计过程中对参数的合理选择提供一些参考依据.The high pressure pump for seawater reverse osmosis desalination systems is an axial suction segment multi-stage pump. In order to improve the efficiency and stability of rotor system, the rotorbearing system for different stages high pressure pump of seawater reverse osmosis desalination systems is mode analyzed using ANSYS. The rotor system critical speed are calculated, and the relationship between the stage number and the critical speed as well as the logarithmic decay rate is studied. The optimal selection for stage number is discussed under consideration of the relationship between pump efficiency and stage number. The results show that 6 stages is more reasonable for rotor system stability and efficien- cy. Some references on selecting reasonable parameters for this type pump design are proposed.

关 键 词：多级离心泵 转子-轴承系统 模态分析 临界转速 对数衰减率 海水淡化 

分 类 号：TH311[机械工程—机械制造及自动化]