摘要
针对套筒阀失稳机理不清晰、动态稳定域不明确、缺乏相应的调控措施等问题,开展理论与试验研究。对采集的新疆某供水管网上DN600套筒阀的振动、压力信号进行频谱分析处理,发现指示杆Z方向最大振幅达251 m/s^(2),低频段出现明显的周期振动频率为100 Hz,依据锁频现象判断套筒阀发生了失稳。基于仿真计算的10阶固有频率与动力学模型分析了失稳原因,提出了套筒阀的动态稳定域和失稳调控措施。试验表明,将套筒阀开度增加至18%、压差减小至0.66 MPa后,套筒阀系统的失稳现象消失,试验结果与动力学模型分析结果吻合。研究表明,压差与开度是影响套筒阀系统稳定性的敏感参数。本文对于指导套筒阀的设计、制造与运维具有较重要的理论意义和工程意义。
Theoretical and experimental research has been conducted to address issues such as unclear instability mechanisms of sleeve valves,unclear dynamic stability domains,and lack of corresponding control measures.Spectrum analysis and processing were conducted on the vibration and pressure signals of the DN600 sleeve valve collected from a certain water supply pipeline network in Xinjiang.It was found that the maximum amplitude in the Z direction of the indicator rod reached 251 m/s^(2),and a significant periodic vibration frequency of 100 Hz appeared in the low frequency range.Based on the frequency locking phenomenon,it was determined that the sleeve valve was unstable.Based on the simulation calculation of the tenth order natural frequency and dynamic model,the reasons for instability were analyzed,and the dynamic stability domain and instability control measures of the sleeve valve were proposed.The experiment shows that after increasing the opening of the sleeve valve to 18%and reducing the pressure difference to 0.66 MPa,the instability phenomenon of the sleeve valve system disappears,and the experimental results are consistent with the dynamic model analysis results.Research has shown that pressure difference and opening are sensitive parameters that affect the stability of sleeve valve systems.This article has significant theoretical and engineering significance for guiding the design,manufacturing,and operation and maintenance of sleeve valves.
作者
谌台广
童成彪
李威
李碧宇
郭建政
CHEN Taiguang;TONG Chenbiao;LI Wei;LI Biyu;GUO Jianzheng(Hunan Agricultural University,Changsha 410125,China;Liaoning University of Petroleum and Chemical Technology,Fushun 113005,China)
出处
《流体机械》
CSCD
北大核心
2023年第10期81-88,共8页
Fluid Machinery
基金
湖南省重点研发计划(2022NK2028)
湖南省自然科学基金项目(2020JJ4045)。
关键词
套筒阀
自激振动
失稳、动态稳定域
sleeve valve
instability mechanism
dynamic stability domain prediction
