| 引用本文: | 刘秀梅,韦建秋,龙正,等.调节阀多测点空化诱导振动敏感性分析.[J].国防科技大学学报,2024,46(4):125-132.[点击复制] |
| LIU Xiumei,WEI Jianqiu,LONG Zheng,et al.Analysis of cavitation-induced vibration sensitivity in regulating valve using multiple measuring points[J].Journal of National University of Defense Technology,2024,46(4):125-132[点击复制] |
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| 调节阀多测点空化诱导振动敏感性分析 |
| 刘秀梅1,韦建秋1,龙正2,李贝贝1,孙深圳1 |
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(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)
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| 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10 000 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。 |
| 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 |
| DOI：10.11887/j.cn.202404013 |
| 投稿日期：2022-05-11 |
| 基金项目: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 |
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| Analysis of cavitation-induced vibration sensitivity in regulating valve using multiple measuring points |
| LIU Xiumei1, WEI Jianqiu1, LONG Zheng2, LI Beibei1, SUN Shenzhen1 |
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(1. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. China Tobacco Shandong Industrial Co., Ltd., Jinan 250014, China)
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| Abstract: |
| 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 10 000 Hz to increase. It is suitable for monitoring cavitation state of control valve. |
| Keywords: vibration regulating valve anisotropic acceleration level ratio gravity frequency 1/3 octave analysis |
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