李伟荣,阮健,任燕,白继平.2D阀控差动缸式电液激振器振动波形研究[J].农业机械学报,2013,44(10):266-271.
Li Weirong,Ruan Jian,Ren Yan,Bai Jiping.Vibration Waveform Research on Electro-hydraulic Exciter of Differential Cylinder Controlled by 2D Valve[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(10):266-271.
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2D阀控差动缸式电液激振器振动波形研究   [下载全文]
Vibration Waveform Research on Electro-hydraulic Exciter of Differential Cylinder Controlled by 2D Valve   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2013.10.043
中文关键词:  2D阀  差动式液压缸  电液激振器  振动波形
基金项目:国家自然科学基金资助项目(50675204、51105337)和浙江省自然科学基金资助项目(D1080667、Y12E050141)
作者单位
李伟荣 浙江工业大学 
阮健 浙江工业大学 
任燕 浙江工业大学 
白继平 浙江工业大学 
中文摘要:为了提高激振器的振动频率,提出了一种由2D阀控制差动式液压缸的新型电液激振器,该激振器通过控制无杆腔容腔的体积变化实现液压固有频率的改变。阐述了激振器的工作原理并建立其数学模型,利用Matlab中的Simulink构建了系统仿真模型,对系统在低、中和高频段工作时的振动波形进行了仿真研究。为了验证理论分析以及激振器在低频段、中频段和高频段工作时实际输出振动波形,设计了电液激振器并进行了实验研究。实验结果表明:激振器的负载以弹性力为主时,振动频率在5Hz以下,激振器输出的振动波形容易出现饱和现象,随着激振频率的提高,饱和现象消失,当振动频率与液压系统固有频率相等时会产生谐振现象(即振动幅值突然放大),过了谐振点后振动幅值会快速下降。
Li Weirong  Ruan Jian  Ren Yan  Bai Jiping
Zhejiang University of Technology;Zhejiang University of Technology;Zhejiang University of Technology;Zhejiang University of Technology
Key Words:2D valve  Differential hydraulic cylinder  Electro-hydraulic exciter  Vibration waveform
Abstract:In order to improve the working frequency of electro-hydraulic exciters, an electro-hydraulic exciter based on differential hydraulic cylinder controlled by 2D valve was proposed, which could realize the change of hydraulic intrinsic frequency by controlling the volume of non-rod chamber. The scheme of electro-hydraulic exciter was analyzed and the mathematical model was set up. The simulation model was also constructed by the Simulink Toolbox of Matlab. The vibration waveform of exciter in low-frequency, middle-frequency and high-frequency were simulated. To verify the theoretical analysis and real vibration waveform of exciter, the electro-hydraulic exciter was designed and experimented. Results showed when the main part of the load constituted by the elastic force, the output waveform of exciter was prone to saturation under frequency of 5 Hz. With the increase of agitating frequency, the saturation disappeared. The resonance phenomenon would be occurred when the exciting frequency was equal to the intrinsic frequency of hydraulic system. The vibration amplitude would drop down rapidly after the resonance frequency. 

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.

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