140 MPa超高压旋塞阀随机振动分析及安装结构改进  

Random Vibration Analysis and Mounting Frame Improvement of 140 MPa Ultra-High Pressure Cock Valve

作　　者：高峰 Gao Feng(Sinopec Oilfield Service Corporation)

机构地区：[1]中石化石油工程技术服务股份有限公司

出　　处：《石油机械》2025年第4期88-95,共8页China Petroleum Machinery

基　　金：国家自然科学基金企业联合基金项目“海相深层油气富集机理与关键工程技术基础研究”(U19B6003)。

摘　　要：针对超高压旋塞阀结构的随机振动问题,利用振动自相关函数和振动功率谱密度函数对其进行分析。建立了旋塞阀系统的三维模型,使用加速度传感器采集该系统的振动信号,并利用有限元法和三区间法对模型进行了模态分析和随机振动分析,根据所分析结果对结构提出优化方案,然后进行分析验证。分析结果表明:应力最大的位置位于阀体和约束件侧表面的接触位置,危险节点的最大响应频率接近该结构2阶频率,易发生共振;改进后结构的最大应力位置转移到了支撑架的斜架上,应力减小了7.3%,可有效避免振动对阀体的影响;最大应力随右侧约束件的厚度增大而减小,考虑到效果和成本,最终采用了厚度为30 mm的约束件。改进后的结构可有效避免共振。The random vibration of the structure of ultra-high pressure cock valve system was analyzed using the vibration autocorrelation function and vibration power spectral density function.A 3D model of the cock valve system was built.The vibration signals of the system were collected using acceleration sensors.Modal analysis and random vibration analysis were performed on the model using finite element method and 3-interval method.Based on the analysis results,an optimization scheme for the structure was proposed and verified.The analysis results show that the maximum stress is located at the contact position between the valve body and the restraint side surface,and the maximum response frequency of the dangerous node is close to the second-order natural frequency of the structure,which makes the structure prone to resonance.After improvement,the maximum stress of the structure is transferred to the inclined frame of the support frame,and the stress magnitude is decreased by 7.3%,effectively avoiding the influence of vibration on the valve body.The maximum stress decreases with the increase of thickness of the right restraint.Considering the effect and cost,a restraint with a thickness of 30 mm is ultimately adopted,and the improved structure can effectively avoid resonance.

关 键 词：压裂设备 超高压旋塞阀 随机振动 三区间法 功率谱密度 模态分析 结构改进 

分 类 号：TE93[石油与天然气工程—石油机械设备]