大型并联立式屏蔽泵的轴系动力响应分析
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摘要
针对当前对立式屏蔽泵的转子-水润滑轴承的动力学特性研究相对薄弱等问题,以大型并联立式屏蔽泵为研究对象,通过合理的简化,建立了其轴系的三维模型,通过有限单元法对其进行预应力模态分析,并在预应力模态分析的基础上,分别对其进行了谐响应分析、瞬态动力学分析,分析得出了立式屏蔽泵轴系系统的不平衡响应曲线和立式屏蔽泵的轴系系统在不同刚度和阻尼下受到突加激励时的瞬态响应曲线。分析结果表明,虽然立式屏蔽泵轴系系统在受到突加激励力后会出现较大的振动,但是很快都趋于稳定,说明该立式屏蔽泵的轴系系统拥有着较好的动力稳定性。以上的研究结果对立式屏蔽泵的设计和研究具有指导作用。
Aiming at the problem that the research on the dynamic characteristics of the rotor-water lubricated bearings of the vertical shielded pumps is relatively weak,taking large parallel vertical shielded pump as the research object,through reasonable simplification,established three-dimensional solid model of the vertical shielded pumps,through the use of finite element method to making the prestressed modal analysis,and on the basis of prestressed modal analysis,making harmonic response analysis and transient dynamic analysis for the vertical shielded pumps,unbalanced response curve and the transient response curves under different stiffness and damping by the sudden excitation of shaft system of the vertical shielded pumps were got. In the analysis results,although shaft system of the vertical shielded pump will be subject to sudden increase in excitation force after the emergence of large vibration,but the vertical shielded pump was fast stable,it shows that the shafting system of vertical shielded pump has good dynamic stability. These experiment results provide some references for the design and research of the vertical shielded pump.
Aiming at the problem that the research on the dynamic characteristics of the rotor-water lubricated bearings of the vertical shielded pumps is relatively weak,taking large parallel vertical shielded pump as the research object,through reasonable simplification,established three-dimensional solid model of the vertical shielded pumps,through the use of finite element method to making the prestressed modal analysis,and on the basis of prestressed modal analysis,making harmonic response analysis and transient dynamic analysis for the vertical shielded pumps,unbalanced response curve and the transient response curves under different stiffness and damping by the sudden excitation of shaft system of the vertical shielded pumps were got. In the analysis results,although shaft system of the vertical shielded pump will be subject to sudden increase in excitation force after the emergence of large vibration,but the vertical shielded pump was fast stable,it shows that the shafting system of vertical shielded pump has good dynamic stability. These experiment results provide some references for the design and research of the vertical shielded pump.
引文
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[10]Zhang Kai,Zhao Lei,Zhao Hong-bin.Research on control of flywheel suspended by active magnetic bearing system with significant gyroscopic effects[J].Chine se Journal of Mechanical Engineering,2004,17(1):63-66.
[2]姚世卫,杨俊,张雪冰.水润滑橡胶轴承振动噪声机理分析与试验研究[J].振动与冲击,2011,30(2):214-216.(Yao Shi-wei,Yang Jun,Zhang Xue-bing.Vibration and noise mechanism analysis and tests for water-lubrication rubber bearings[J].Journal of Vibration and Shock,2011,30(2):214-216.)
[3]蒋小平,施卫东,李伟.泵水润滑轴承-转子系统的动力学特性研究[J].农业机械学报,2013,44(1):62-66.(Jiang Xiao-ping,Shi Wei-dong,Li Wei.Rotor dynamic characteristics of water lubricated bearing for pumps[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(1):62-66.)
[4]张德胜,耿琳琳,施卫东.轴流泵水力模型压力脉动和振动特性的试验研究[J].农业机械学报,2015,46(6):66-72.(Zhang De-sheng,Geng Lin-lin,Shi Wei-dong.Experimental investigation on pressure fluctuation and vibration in an axial-flow pump model[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(6):66-72.)
[5]蒋小平,施卫东,李伟.高压多级泵水润滑轴承-转子系统动力稳定性分析[J].农业工程学报,2012,28(22):45-50.(Jiang Xiao-ping,Shi Wei-dong,Li Wei.Dynamic stability analysis on water lubricated bearing rotor system of high pressure multistage pump[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(22):45-50.)
[6]刘建瑞,陈斌,张金凤.余热排出泵水中模态分析[J].排灌机械工程学报,2015,33(4):290-295.(Liu Jian-rui,Chen Bin,Zhang Jin-feng.Mode analysis for rotor of residual heat removal pump in water[J].Journal of Drainage and Irrigation Machinery Engineering,2015,33(4):290-295.)
[7]王福军,张玲,张志民.轴流泵不稳定流场的压力脉动特性研究[J].水利学报,2007,38(8):1003-1009.(Wang Fu-jun,Zhang Ling,Zhang Zhi-min.Analysis on pressure fluctuation of unsteady flow in axial-flow pump[J].Journal of Hydraulic Engineering,2007,38(8):1003-1009.)
[8]韩一磊,程礼.基于ANSYS的转子间耦合对系统动力特性的影响研究[J].机械设计与制造,2008(8):12-14.(Han Yi-lei,Cheng Li.Research on the effect of rotor coupling on system dynamic characteristic based on the ANSYS[J].Machinery Design and Manufacture,2008(8):12-14.)
[9]周文建,陈宏,闻邦椿.核电站反应堆冷却剂泵的地震响应分析[J].振动与冲击,2006(1):32-35+162-163.(Zhou Wen-jian,Chen Hong,Wen Bang-chun.Seismic response analysis of reactor coolant pump in nuclear power plant[J].Journal of Vibration and Shock,2006(1):32-35+162-163.)
[10]Zhang Kai,Zhao Lei,Zhao Hong-bin.Research on control of flywheel suspended by active magnetic bearing system with significant gyroscopic effects[J].Chine se Journal of Mechanical Engineering,2004,17(1):63-66.