调节阀多测点空化诱导振动敏感性分析  

Analysis of cavitation-induced vibration sensitivity in regulating valve using multiple measuring points

作　　者：刘秀梅[1] 韦建秋 龙正 李贝贝[1] 孙深圳 LIU Xiumei;WEI Jianqiu;LONG Zheng;LI Beibei;SUN Shenzhen(School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China;China Tobacco Shandong Industrial Co.,Ltd.,Jinan 250014,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]山东中烟工业有限责任公司,山东济南250014

出　　处：《国防科技大学学报》2024年第4期125-132,共8页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(51875559);江苏省优势学科平台资助项目。

摘　　要：针对调节阀阀体不同测点处对流道内空化敏感性存在差异问题,开展了不同测点处空化诱导振动的差异性研究和空化发展状态敏感程度分析。搭建了调节阀空化振动加速度信号采集试验平台,同步采集了多测点处调节阀空化诱导振动的加速度信号。提出了加速度级比率和重心频率两个表征参数,并利用1/3倍频程谱对调节阀空化振动信号频谱进行划分,最终得到对空化发展最敏感的频带和测点位置。结果表明:调节阀阀体同一表面测点振动信号呈现相似性,不同表面测点信号差异性较大,即调节阀振动信号表现为各向异性;空化状态的发展主要引起中心频率10000 Hz以上的频带振动强度增大,适合作为监测调节阀空化状态的特征频带。Aiming at the difference in the cavitation sensitivity of the control valve at different measuring points of the regulating valve body,study on the difference of cavitation induced vibration and the cavitation sensitivity of different measuring points was carried out.A test platform for cavitation-induced vibration acceleration signal acquisition of regulating valve was built,and the acceleration signals of cavitation vibration of regulating valve at multiple measuring points were simultaneously collected.Two characterization parameters,the acceleration level ratio and the gravity frequency,were proposed.Frequency spectrum of the cavitation vibration signal of regulating valve was divided by the 1/3 octave frequency spectrum,and finally the frequency band most sensitive and location of measuring points to cavitation development was obtained.Results show that the vibration signals of measuring point on the same surface of the regulating valve body are similar,and the signals on different surface are significantly different.Vibration signals of the regulating valve are anisotropic.Development of cavitation extent mainly causes the vibration intensity of the frequency band above the center frequency of 10000 Hz to increase.It is suitable for monitoring cavitation state of control valve.

关 键 词：振动 调节阀 各向异性 加速度级比率 重心频率 1/3倍频程分析 

分 类 号：TH137[机械工程—机械制造及自动化]