循环流化床颗粒循环管道系统的诱导振动分析  

Analysis of the Induced Vibration of Particle Circulating Pipeline System in CFB

作　　者：胡霞[1] 贺娇 于化龙 王江云 魏耀东 HU Xia;HE Jiao;YU Hua-long;WANG Jiang-yun;WEI Yao-dong(Department of Mechanical Engineering,Karamay Vocational and Technical College;College of Engineering,Karamay Campus of China University of Petroleum（Beijing)

机构地区：[1]克拉玛依职业技术学院机械工程系 [2]中国石油大学(北京)克拉玛依校区工学院

出　　处：《化工机械》2018年第4期411-417,共7页Chemical Engineering & Machinery

基　　金：新疆维吾尔自治区高校科研计划青年教师科研启动基金项目(XJEDU2016S108);中国石油大学(北京)克拉玛依校区科研启动基金项目(RCYJ2016B-02-002)

摘　　要：基于气固两相流分析了颗粒循环管道系统各单元的振动原因,主要是气固两相流流动过程中浓度和速度的不稳定性变化、涡流的产生与脱落导致了压力的脉动,进而形成诱导振动的激振力。在颗粒循环管道系统中,不同单元的激振力所形成的机制是不同的,大小和频率也不同。当激振力的频率接近单元设备的固有频率时,将导致共振发生,产生强烈的机械振动。防止管道振动的措施应从消减管道系统激振力与改善管道系统振动特性两方面进行。分析结果可以为循环流化床管道的防振提供一定的技术支持。Having gas-solid flow based to analyze each element vibration of the circulating pipeline system was implemented to show that,the unstable change of concentration and velocity of the gas-solid flow and the pressure fluctuation incurred by vortex generation and shedding in the pipe can generate an exciting force which induces the vibration. In particle-circulating pipeline system,the mechanism of generating exciting force varies and the amplitude and the frequency of the exciting force are different as well. When frequency of the exciting force closes to natural frequency of the pipeline,it will result in a resonance formation and produces a strong mechanical vibration with high amplitude. The measures to prevent pipe system vibration can be carried out in two ways,i. e. reducing the exciting force of the pipe system and improving the vibration characteristics of the pipe system. The analysis results provide certain technical support for the anti-vibration of the pipeline system.

关 键 词：循环流化床 气固两相流 颗粒循环管道系统 诱导振动 激振力 固有频率 振动特性 

分 类 号：TQ051.1[化学工程]