姚永灵,卢修连,卢承斌,马运翔,杨建刚
YAO Yong-ling,LU Xiu-lian,LU Cheng-bin,MA Yun-xiang,YANG Jian-gang

• 1:江苏方天电力技术有限公司
• 2:东南大学

摘要(Abstract)：

建立了离心泵全流道三维定常及非定常CFD数值模型,通过非稳态计算得到作用于叶轮上的流体激振力,同时建立了泵转子有限元模型,研究不平衡质量与非稳态流体激振力对转子振动特性的影响。研究结果表明离心泵叶轮内流体激振力具有多种频率成分。不考虑转子上不平衡质量影响时,叶轮处转子在流体激振力作用下振动幅值最大,依次为转轴中部、下部轴承和上部轴承对应的转子位置。转轴上不同位置振动频率特性具有差异,实际故障诊断时要考虑测试部位的影响。考虑不平衡质量影响时,在远离受流体激振力作用的叶轮部位,转子振动频率成分减少。
The full-passage three-dimensional steady and unsteady CFD models were built for the centrifugal pump and fluidinduced excitation forces acting on the impeller were obtained,at the same time,the finite element model of the pump rotor was built to research the influence of unbalanced mass and unsteady fluid-induced excitation forces on rotor vibration. The research results show that there are several frequency components in the fluid-induced excitation force within the centrifugal pump impeller. The vibration amplitude of the rotor at the location of impeller under the action of fluid-induced excitation force is biggest when the effect of the unbalanced mass on the rotor is not taken into account,the amplitude decreases at the locations corresponding to the middle of rotor,lower bearing and upper bearing. Results also show that the vibration frequency characteristics at different locations are different,the influence of the test location should be taken into account in practical fault diagnosis. When the unbalanced mass is taken into account,the vibration frequency components of the rotor were reduced especially at the locations of impeller far away from action of fluid-induced excitation forces.

关键词(KeyWords)： 非稳态流动;离心泵;转子振动;计算流体力学
unsteady flow;centrifugal pump;rotor vibration;computational fluid dynamics(CFD)

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 姚永灵,卢修连,卢承斌,马运翔,杨建刚
YAO Yong-ling,LU Xiu-lian,LU Cheng-bin,MA Yun-xiang,YANG Jian-gang

参考文献(References)：

• [1]Gonzalez J.Steady and unsteady radial forces for a centrifugal pump with impeler to tongue gap variation[J].Journal of Fluid Engineering,2006,128(2):454-462.
• [2]Benra F K,Dohmen H J.Comparison of pump impeler orbitcurves obtained by measurement and FSI simulation[C].2007 ASME Pressure Vessels and Piping Division Conference,2007.
• [3]Dring R P,Joslyn H D.Turbine rotor-stator interaction[J].ASME Journal Engineering Power,1982,104(4):729-742.
• [4]Shi F,Tsukamoto H.Numerical study of pressure fluctuationscaused by impeller-diffuser interaction in a diffuser pumpstage[J].Transactions of the ASME,2001,123(9):466-474.
• [5]黄思,吴玉林.离心泵内三维流场非对称性及泵受力的数值分析[J].流体机械,2006,34(2):30-33.
• [6]刘全忠,宫汝志.高速泵隔舌间隙对叶轮流体作用力的影响[J].水泵技术,2009(4):26-28.
• [7]袁寿其,薛菲,袁建平.高速泵压力脉动对流动噪声影响的试验研究[J].排灌机械,2009,27(5):287-290.
• [8]王福军,张玲,黎耀军.轴流式水泵非定常湍流数值模拟的若干关键问题[J].机械工程学报,2008,44(8):73-77.
• [9]窦唯,刘占生.流体激振力对高速泵转子振动特性的影响研究[J].机械科学与技术,2013,32(3):377-382.
• [10]赵博,陈长盛,符栋梁,等.流体激励诱发轴流泵结构振动计算方法[J].噪声与振动控制,2015,35(2):28-32.
• [11]何涛,尹志勇,孙玉东.离心泵流动诱发振动特性数值计算分析[J].振动与冲击,2012,31(12):96-102.
• [12]刘超.离心泵振动故障分析及排查措施[J].化工设备与管道,2016,53(4):64-65.
• [13]王涛.大型发电机组轴系碰摩故障仿真[D].南京:东南大学,2009.
• [14]张玉良,汪灿飞,张陈良,等.多级离心泵首级叶轮停机特性数值研究[J].机电工程,2017,34(1):10-17.
• [15]蔡力钢,马仕明,赵永胜,等.多约束状态下重载机械式主轴有限元建模及模态分析[J].机械工程学报,2012,48(3):165-173.
• [16]Zhang W F,Yang J G,Gao Q S,et al.Reducing the influence of partial admission on unstable synchronous vibration of turbines by bearing elevation optimization[J].Proceedings of the IMech Part C:Journal of Mechanical Engineering Science,2014,228(1):56-66.