1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Mechanical Engineering, Nantong University, Nantong, Jiangsu 226019, China
Abstract：The LNG low temperature submersible pump is modeled by UG and the thermo-fluid-structure coupling of the rotor components are calculated by ANSYS Workbench as the platform. The thermodynamic coupling force of the flow field to the solid structure is obtained. The modes of the rotor components are analyzed with or without prestressing force. Based on the results, the first ten order modes are extracted and the modes in the two cases are compared. The results show that except for the seventh-order and eighth-order vibrations, the vibration of the other stages is expressed on the impeller; after the prestressing is added, the various modes of the rotor component do not change.But the natural frequency of each order has a slight change,the prestress has little effect on the natural frequencies of the rotor components. The natural frequency of the ninth and tenth order are close to the three times the blade frequency of the pump, so there is the danger of resonance.It is necessary to optimize the design of the rotor components so that the front three times the blade frequency can be far away from the natural frequencies of the various stages, thereby avoiding the resonance of the pump during operation. Under the influence of prestressing force, the amplitude of the rotor parts also has a small change.
张智伟,施卫东*,张德胜,陈宗贺,黄俊. 基于热流固耦合的LNG低温潜液泵转子部件模态分析[J]. 排灌机械工程学报, 2019, 37(3): 211-215.
ZHANG Zhiwei,SHI Weidong*,ZHANG Desheng,CHEN Zonghe,HUANG Jun. Modal analysis of rotor parts of LNG low temperature submersible pump based on thermo-fluid-structure coupling. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(3): 211-215.
[1]齐立龙.双向泵叶片应力与模态分析[D]. 扬州:扬州大学, 2015.[2]李德源, 叶枝全, 包能胜,等. 风力机旋转风轮振动模态分析[J]. 太阳能学报, 2004, 25(1):72-77. LI Deyuan, YE Zhiquan, BAO Nengsheng, et al. Vibration modal analysis of wind turbine rotating wind wheel[J]. Journal of solar energy, 2004, 25(1): 72-77.(in Chinese)[3]刘厚林, 白羽, 董亮,等. 高温高压冶金用热水循环泵模态分析[J]. 江苏大学学报(自然科学版), 2015, 36(2):159-164. LIU Houlin, BAI Yu, DONG Liang, et al. Modal analysis of metallurgical hot water circulating pump at high temperature and pressure [J]. Journal of Jiangsu University(natural science edition), 2015, 36(2):159-164.(in Chinese)[4]冀宏, 武俊合, 王金林,等. 液压电机叶片泵的振动模态分析[J]. 兰州理工大学学报, 2013, 39(2):25-28. JI Hong, WU Junhe, WANG Jinlin, et al. Vibration mode analysis of hydraulic motor vane pump[J]. Journal of Lanzhou University of Technology, 2013, 39(2): 25-28.(in Chinese)[5]刘厚林, 徐欢, 王凯,等. 基于流固耦合的余热排出泵转子模态分析[J]. 流体机械, 2012, 40(6):28-32. LIU Houlin, XU Huan, WANG Kai, et al. Modal analysis for rotor of residual heat removal pump based on fluid-structure interaction [J]. Fluid machinery, 2012, 40(6): 28-32.(in Chinese)[6]EGUSQUIZA E,VALERO C,HUANG X, et al. Failure investigation of a large pump turbine runner [J].Engineering Failure Analysis,2012,23:27-34.[7]周岭, 侯云鹤, 王伟,等. 基于LMS Virtual.Lab的多级离心泵数值模态分析[J]. 流体机械, 2017, 45(6):21-25. ZHOU Ling, HOU Yunhe, WANG Wei, et al. Numerical modal analysis of multistage centrifugal pump based on LMS Virtual.Lab[J]. Journal of fluid machinery, 2017, 45(6): 21-25.(in Chinese)[8]陈兴,舒双文,周帼彦,等.基于内聚力模型的T型钎焊接头裂纹扩展数值模拟[J].压力容器,2014,31(7):7-13. CHEN Xing, SHU Shuangwen, ZHOU Yiyan, et al. Numerical simulation of crack propagation of T-type brazed joints based on cohesive zone model [J]. Pressure vessel, 2014, 31(7): 7-13.(in Chinese)[9]ARTAL B E, CASSOU N P, LUENGO I, et al. A modal approach for vibration analysis and condition monitoring of a centrifugal pump[J]. International journal of engineering science & technology, 2011, 3(8):321-343.[10]江亲瑜,史哲,李宝良. 基于ANSYS的高压低噪小流量离心泵泵体的模态分析CTS[J].大连交通大学学报,2010,31(5):25-28. JIANG Qinyu SHI Zhe,LI Baoliang. Model analysis of high pressure low noise small flow centrifugal pump body based on ANSYS[J].Journal of Dalian Jiaotong University, 2010,31(5):25-28.(in Chinese)[11]杨敏官,高波,贾卫东,等.熔盐泵轴承冷却及润滑系统的分析Cl7[J].江苏大学学报(自然科学版),2005,27(2):149-52. YANG Minguan, GAO Bo, JIA Weidong, et al. Analysis of cooling and lubricating system of bearings in pumps for melted salts Cl7[J].Journal of Jiangsu University(natural science edition), 2005, 27(2): 149-52.(in Chinese)[12]陈宇杰, 郑源, 阚阚,等. 轴流泵转子系统水中模态分析[J]. 排灌机械工程学报, 2017, 35(2):126-132. CHEN Yujie, ZHENG Yuan, YAN Yan, et al. Modal analysis of axial-flow pump rotor system in water [J]. Journal of drainage and irrigation machinery engineering, 2017, 35(2):126-132.(in Chinese)[13]张新, 郑源, 钱钧,等. 基于流固耦合的卧式轴流泵叶轮模态分析[J]. 水电能源科学, 2015,33(7):164-167. ZHANG Xin, ZHENG Yuan, QIAN Jun, et al. Modal analysis of horizontal axial flow pump impeller based on fluid-structure coupling[J]. Hydroelectric energy scien-ce, 2015,33(7):164-167.(in Chinese)[14]张正阳, 郑源, 张新. 预应力与水介质对轴流泵叶轮模态的影响[J]. 水电能源科学, 2015,33(4):160-163. ZHANG Zhengyang, ZHENG Yuan, ZHANG Xin. Effect of prestress and water medium on the mode of axial pump impeller[J]. Hydroelectric energy science, 2015,33(4):160-163.(in Chinese)
