Abstract:

The traditional electro-hydraulic exciters were very difficult to enhance the vibration frequency, so a new electro-hydraulic exciter based on single-rod hydraulic cylinder controlled by 2D valve was proposed. The scheme of electro-hydraulic exciter was described firstly, then the mathematical model was established and simulation analysis was executed. Finally, the electro-hydraulic exciter was designed and the experimental research was performed. The theoretical and experimental results show the output waveform of exciter is prone to saturation under 5Hz; with improvement of agitating frequency, the saturation phenomenon is uneasy to appear. The output force of exciter is proportional to the axial opening of 2D valve, the greater the axial opening of 2D valve, the bigger the output force of exciter.

Key words: 2D valve, one-pole hydraulic cylinder, electro-hydraulic exciter, low frequency characteristics

摘要：

针对传统电液激振器振动频率难以提高的现状，提出了一种基于差动连接的2D阀控单出杆液压缸的新型电液激振器。阐述了激振器的工作原理，建立了数学模型并进行了仿真分析，设计了电液激振器并进行了实验研究。理论和实验结果表明：振动频率在5Hz以下工作时，激振器输出的振动波形容易出现饱和现象;随着频率的提高，饱和现象就不容易出现。激振器输出力的大小与2D阀的轴向开口成正比关系，轴向开口越大，输出的力越大。

关键词: 2D阀, 单出杆液压缸, 电液激振器, 低频特性