邹淑云,刘 忠,李志鹏,杨 平.离心泵空化状态与声发射信号特征关系试验[J].农业机械学报,2014,45(3):45-48.
Zou Shuyun,Liu Zhong,Li Zhipeng,Yang Ping.Experiment on Relationships between Centrifugal Pump Cavitation Conditions and Acoustic Emission Signal Characteristics[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(3):45-48.
摘要点击次数: 3134
全文下载次数: 1478
离心泵空化状态与声发射信号特征关系试验   [下载全文]
Experiment on Relationships between Centrifugal Pump Cavitation Conditions and Acoustic Emission Signal Characteristics   [Download Pdf][in English]
投稿时间:2013-11-19  
DOI:10.6041/j.issn.1000-1298.2014.03.008
中文关键词:  离心泵 空化 声发射 特征参数
基金项目:国家自然科学基金资助项目(51309034)、湖南省科技计划资助项目(2012GK3057)和湖南省教育厅科研项目(11C0027)
作者单位
邹淑云 长沙理工大学 
刘 忠 长沙理工大学 
李志鹏 长沙理工大学 
杨 平 中南林业科技大学 
中文摘要:为了获得离心泵空化状态下声发射信号的变化规律,在离心泵空化试验基础上,采用声发射技术采集并分析了离心泵不同空化状态下的声发射信号,提取了声发射信号的事件计数、振铃计数、频率中心和有效电压值等4种典型特征参数,分析了这些参数随离心泵汽蚀余量变化的对应关系。研究表明,在空化未发生、刚发生和已完全形成等不同阶段,这些典型特征参数变化具有明显特点,先有少许波动,然后有较大幅度的增加或减少,再呈现较大幅度的减少或增加的趋势。这一规律可作为采用声发射技术辨识离心泵空化状态的技术依据。
Zou Shuyun  Liu Zhong  Li Zhipeng  Yang Ping
Changsha University of Science and Technology;Changsha University of Science and Technology;Changsha University of Science and Technology;Central South University of Forestry and Technology
Key Words:Centrifugal pump Cavitation Acoustic emission Parameter analysis
Abstract:In order to obtain the variation law of the acoustic emission signals under the centrifugal pump’s cavitation states, the research was based on the centrifugal pump cavitation test. The acoustic emission technology was adopted to collect and analyze the acoustic emission signals. Four typical features were extracted, i.e. event count, ringing count, frequency centroid and root mean square. Their relationships with the net positive suction heads of the centrifugal pump were analyzed in detail. The results show that these typical characteristic parameters change obviously under different stages such as before the occurrence of cavitation, cavitation first appearing and cavitation being fully developed. They firstly fluctuate a little, then increase or decrease substantially, and then there are large reducing or increasing trends respectively. This law can be used as a technical basis for identifying the cavitation conditions of centrifugal pumps with the acoustic emission technique.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

   下载PDF阅读器