多振动源激励下船用离心泵振动特性分析  

Analysis of Vibration Characteristics of Marine Centrifugal Pump Excited by Multiple Vibration Sources

作　　者：赵文斌[1] 张宇航 尚欢欢 董亮[2] 刘厚林[2] ZHAO Wenbin;ZHANG Yuhang;SHANG Huanhuan;DONG Liang;LIU Houlin(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,Jiangsu,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013 [2]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《机械科学与技术》2021年第11期1670-1674,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51879122,51779108,51779106);镇江市重点研发计划项目(GY2017001,GY2018025);西华大学流体及动力机械教育部重点实验室开放课题项目(szjj2017-094)。

摘　　要：为了确定流体激励和轴系激励对离心泵振动的主要影响,通过对离心泵进行非定常流场计算,分析流体激励和轴系激励诱导离心泵振动特性。选择采用轴系不对中作为激励源,结果表明:轴系不对中时,离心泵在1APF(电机转动频率)处振动响应增强,并出现明显的2APF响应,1BPF(1倍叶片通过频率)处振级和中频段振级几乎无变化;当流体激励并伴有轴系不对中时,离心泵在1APF处和1BPF处出现明显的振动响应,1BPF处的振级与仅轴系激励时相差较大。In order to determine the scope of influence of fluid excitation and shafting excitation on the centrifugal pump vibration,we calculated the unsteady flow field of a centrifugal pump and analyzed the vibration characteristics of this pump under fluid excitation and shafting excitation.We choose to use misalignment fault of rotor system as the shafting excitation in this paper.The numerical simulation results show that when the shafting is misaligned,the vibration response of the pump at 1APF(motor rotational frequency)is enhanced,a significant vibration response occurred at 2APF,and there is almost no change in the vibration level at 1BPF(blade passing frequency)and the middle-frequency.When the centrifugal pump is excited by fluid excitation and the misaligned excitation,the centrifugal pump has obvious vibration response at 1APF and 1BPF.The vibration level at 1BPF differs greatly from that at shafting excitation only.

关 键 词：离心泵 振动特性 数值模拟 流体激励 轴系振动 

分 类 号：TK730[交通运输工程—轮机工程]