柱塞泵出口管线振动模态仿真分析  

Vibration Modal Simulation Analysis of Outlet Pipeline of Piston Pump

作　　者：王禄友 朱林 李骏瑜 赵婷婷 孙炜[1] 

机构地区：[1]中石油玉门油田分公司环庆分公司,甘肃 庆阳

出　　处：《机械工程与技术》2023年第2期177-187,共11页Mechanical Engineering and Technology

摘　　要：JD采油厂原油正式外输西部管道以来,外输柱塞泵出口管路振动严重的问题一直未得到有效解决。在外输期,曾出现过由于管路振动而引起的压力表头脱落、螺栓松动进而发生刺漏的问题,给生产造成了影响,也给安全留下了隐患。为了分析研究柱塞泵出口管线振动的原因,提出合理的减振方案,降低管线发生共振的风险。从振动模态分析的角度出发,在CREO软件中建立出口管线1:1模型,应用ANSYS软件对管线进行模态分析,求得了不同边界条件下管线的固有频率和模态振型。对比分析后,结果表明:在现有支撑条件下,前三阶固有频率在工作频率范围内,管线正常工况条件下存在共振的风险;只在回流管弯头处增加支撑,会使低阶固有频率提高至常用工作频率,增大共振风险;在回流管弯头、主管线单流阀和闸阀之间均增加支撑,可有效提高管线固有频率,降低共振风险;另外,验证增加软连接管的措施是有风险的。Since JD Oil Production Plant exported crude oil to the west, the problem of serious vibration in the outlet pipeline of external plunger pump has not been effectively solved. During the external transport period, there have been problems such as pressure gauge head falling off, bolt loosening and leakage caused by pipeline vibration, which has affected production and left a hidden danger to safety. In order to analyze the causes of the vibration of the outlet pipeline of the plunger pump, a reasonable vibration reduction scheme is proposed to reduce the risk of pipeline resonance. From the point of view of vibration modal analysis, the outlet pipeline 1:1 model is established in CREO software, and the pipeline modal analysis is carried out by using ANSYS software, and the natural frequency and modal shape of the pipeline under different boundary conditions are obtained. After comparative analysis, the results show that: under the existing support conditions, the first three natural frequencies are within the range of working frequency, and there is a risk of resonance un-der the normal working condition of the pipeline. Increasing the support only at the elbow of the return pipe will increase the low-order natural frequency to the common working frequency and increase the resonance risk. Adding support between return pipe elbow, main line single flow valve and gate valve can effectively improve the natural frequency of the pipeline and reduce the risk of resonance. In addition, verifying the addition of soft connection tubes is risky.

关 键 词：管路振动 主管线 单流阀 工作频率范围 柱塞泵 管线振动 出口管线 支撑条件 

分 类 号：TE9[石油与天然气工程—石油机械设备]