排灌机械工程学报Issue(1)：18-23,6.DOI:10.3969/j.issn.1674-8530.13.0066
高压多级离心泵转子系统的不平衡响应特性
Unbalance response characteristics of rotor system in high pressure multi-stage pump
摘要
Abstract
In order to solve the rotating unbalance problem of the rotor in a high pressure multistage centrifugal pump,the modals of its rotor system supported by two water lubricated bearings were calcu-lated by using FEM method,the mass unbalance location and distribution on the rotor were analyzed and optimized.The results show that this rotor system is rigid based on the 1 st critical speed predicted. Under the design rotating speed,when a rotating unbalance is applied on the rotor at different posi-tions,the vibration amplitude of the bearing in the suction chamber side exhibits substantial changes, indicating that bearing is very sensitive to unbalance;the vibration amplitude of the bearing in the dis-charge chamber side,however,has a little change and is insensitive to unbalance.Importantly,the residual unbalance mass distributed in the first three stages has a greater effect on shafting unbalance response.The case with smaller vibration amplitude in the two bearings has been secured by changing balance quality grades of the impellers and balance disk.When the balance quality grade of the first two-stage impellers is G2.5,but the grade of the rest impellers and the balance disk is G6.3,the bearing in the suction chamber side shows a significantly reduced vibration amplitude and the bearing in the discharge chamber side still keeps an acceptable small vibration amplitude.Under the other ro-tating speeds,the bearing in the suction chamber side can be even more sensitive to an unbalance mass than that in the discharge chamber side,thus it is suggested that the former should use a material with better wear-resistant property.These results can provide a theoretical basis and reference for stable operation of rotor system in high-pressure multistage centrifugal pumps.关键词
多级泵/转子动力学/临界转速/平衡精度/不平衡响应Key words
multi-stage centrifugal pump/rotor dynamics/critical speed/balance precision/unbalance response分类
农业科技引用本文复制引用
张德胜,汪靖,施卫东,叶晓琰,田海平..高压多级离心泵转子系统的不平衡响应特性[J].排灌机械工程学报,2014,(1):18-23,6.基金项目
“十二五”国家科技支撑计划项目（2012BAB17B02-4，2011BAF14B01）；国家自然科学基金资助项目（51276083）；江苏省优势学科建设项目 （）
