In many applications, pumps are tested against standard specifications to define the maximum allowable vibration amplitude limits of a pump. It is essential to identify the causes of vibration and methods to attenuate the same to ensure the safe and satisfactory operation of a pump. Causes of vibration can be classified mainly into mechanical and hydraulic nature. Respective unbalance masses are the two major factors which cause dynamic effects and excitation forces leading to undesirable vibrations. In this paper, the procedure of vibration magnitude measurement of a vertical turbine pump at site and the process of dynamic balancing to measure mechanical unbalance of an impeller are explained. After that, the impact of hydraulic eccentricity on the vibration displacement of a vertical turbine pump has been explained using numerical simulation procedure based on “One-way Fluid Structure Interaction (FSI).” The experimental results from a pump at site are used to compare the numerical results. After the solver validation, the one-way FSI approach is used to find the critical hydraulic eccentricity magnitude of a vertical turbine pump impeller to limit the vibration magnitudes on motor component to less than 100 μm. From the numerical simulations, it is deduced that the critical hydraulic eccentricity should be limited to 400 μm in and direction. The process can be used as a guideline procedure for limiting the hydraulic unbalance in vertical turbine pumps by limiting the hydraulic eccentricity.

国际旋转机制杂志

目录

目录

电影冷却效果下游实验和数值研究

类型合成基础与虚拟旋转中心应用

极数对生成器结束电磁力和RISC前后机械响应

RimeIcing相似性实验研究

人工辐射永久磁带生成器车辆旋转磁力分析

弹性复合柱形滚动元素动态属性分析

实验片冷却三层环形洞

定制离心涡轮机处理电动燃料电池涡轮充电

实验调查阳性偏移机漏水

临界液态中心度估计垂直Turbine泵插件控制振荡

组合采集器侧载链对不平衡动态振荡

多源故障信号分离旋转机

研发小型冰风隧道测试系统

优化磁极永久磁电机Taguchi法分析

Groove参数研究Spiral-Grooved脉冲带气润滑