基于阻尼减振技术的热电厂减温减压器管道研究

为解决抚顺某热电厂减温减压器减温水管道振动严重的问题,将阻尼减振技术应用到管道减振中。开展了对减温水管道系统振动频率和速度的现场测量及其图纸资料的搜集,运用有限元分析软件Sap2000建立了管道有限元模型,进行了模态和力学分析,掌握了减温水管道的振动特性,并且对管道进行了阻尼减振模拟仿真,建立了管道振动特性与阻尼减振技术之间的关系。依据模拟仿真的数据结果,提出了解决管道振动的最佳方案。该方案运用阻尼减振技术,在不停机、未改变管道原有结构布置的情况下,在管道的适当位置安装了阻尼器,实现了工程项目的减振改造。实际改造结果表明,安装了阻尼器的管道振动速度达到了管道振动安全标准的要求,能够保证机组长周期、稳定运行。

Pipeline of pressure reducer and attemperator in a power plant based on vibration-damping technology

In order to solve the problems of the pressure reducer and attemperator water pipeline vibration in a power plant in Fushun, the pipeline damping technology was investigated. The vibration frequency and velocity of piping systems were measured and the drawings were collected. A finite element model for piping system was established. After the structure modal analysis and mechanical analysis were carried out, the vibration characteristics of pipeline were obtained. Damping vibration of pipeline simulation was carried out by applying SAP2000 software. The relationship between the piping vibration characteristics and damping technology was founded. According to simulation results, the best way to solve the pipeline vibration was put forward. The actual results show that, by using damping vibration technology, installing dampers to suitable location in the pipes can effectively suppress the vibration of the pipeline without shutting down the machine set and chan- ging the original structure of the piping systems, then ensure long cycle and stable operation of unit.