超高速电液比例阀的设计与实验研究

Design and Experimental Investigation of an Ultra-high-speed Electro-hydraulic Proportional Valve

针对常规电液比例阀在响应时间和响应速度等性能上的不足,设计了一种超高速电液比例阀,并且提出了8片瓦型有气隙Halbach磁化阵列型动圈式电-机械转换器。通过力特性分析,建立了超高速电液比例阀的动态数学模型,并对其动态性能进行了仿真研究。结果表明:仿真频宽达到395 Hz/-3 dB,465 Hz/-90°,响应时间为0.0024 s,而实验频宽达到300 Hz/-3dB,响应时间为0.004 s,与仿真结果基本吻合。

Aiming at the deficiency of the conventional electro-hydraulic proportional valves performance, such as response time and response speed, an ultra-high-speed electro-hydraulic proportional valve is proposed, and the structure of an electro-mechanical converter is put forward using eight pieces tegular Halbach magnet array with gaps. The mathematical model is given via the analysis of force characteristic, and simulation was carried out for studying the dynamic characteristics of an ultra-high-speed electro-hydraulic proportional valve. The results show that simulation frequency is 395 Hz at -3 dB, 465 Hz at -90° and response time is 0. 0024 s. Moreover, experi- mental frequency is 300 Hz at - 3 dB and response time is 0. 004 s ; experimental results agree well with simulation results. The results show that the designed electro-hydraulic proportional valve has the characteristic of high frequency and rapid response, and can satisfy the requirements of high speed electro-hydraulic proportional control system.