摘要
为了定量研究环形密封动力特性对转子系统临界转速的影响,基于环形密封动力学模型和Fluent软件,计算了海水淡化高压泵中三种环形密封的动力特性系数矩阵,并利用ANSYS Workbench平台计算了环形密封-轴承-转子耦合系统的临界转速,对比分析了环形密封对三级转子系统临界转速的影响。结果表明:不考虑环形密封时,转子系统为刚性转子,其工作转速低于0.8倍的第一阶临界转速,避免了转子系统共振的发生;考虑环形密封后,转子前三阶临界转速分别提高了45.1%、3.2%和0.6%。因此,环形密封在海水淡化高压泵转子系统中起到了一定的支撑作用,提高了转子系统的稳定裕度。
In order to quantitatively study the influence of dynamic characteristics of annular seal on critical speed of rotor system,the dynamic characteristic coefficient matrix of three kinds of annular seals in high-pressure seawater desalination pump was calculated based on the dynamic model of annular seal and Fluent software.The critical speed of the annular seal-bearing-rotor coupling system is calculated by using ANSYS Workbench platform,and the influence of the annular seal on the critical speed of the three-stage rotor system is compared and analyzed.The results show that without considering the ring seal,the rotor system is a rigid rotor,and its working speed is lower than 0.8 times of the first critical speed,which avoids the occurrence of rotor system resonance;When the ring seal is considered,the first three critical speeds of the rotor are increased by45.1%,3.2% and 0.6% respectively.Therefore,the annular seal plays a supporting role in the rotor system of high-pressure seawater desalination pump and improves the stability margin of the critical speed of the rotor.
作者
叶晓琰
杨孟子
YE Xiaoyan;YANG Mengzi(Research Center of Fluid Machinery Engineering and Technolgy,Jiangsu University,Zhenjiang 212013,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2022年第3期40-45,共6页
Technology of Water Treatment
基金
国家重点研发计划项目(2017YFC0403703)。
关键词
海水淡化高压泵
转子系统
环形密封
临界转速
seawater desalination high pressure pump
rotor system
annular seal
critical speed
