本文介绍一种采用伺服阀控制的直线运动液压缸实现有限回转角转动的电液伺服系统。它能对回转角小于９０°的转动轴进行角度自动控制，具有结构紧凑、整体密封性能好、输出功率大、响应快、节能、工作可靠和通用性好等特点，可用于大型阀门的开度自动调节系统，特别适用于工作环境恶劣、需要远距离控制及长期连续工作的场合 This paper introduces a servo valve controlled linear motion hydraulic cylinder to achieve a limited rotation angle electro-hydraulic servo system. It can angle less than 90 ° rotation angle automatic control, with a compact structure, the overall sealing performance, output power, fast response, energy saving, reliable and versatile and can be used for large valve opening Automatic adjustment system, especially for poor working environment, the need for long-distance control and long-term continuous operation of the occasion