通径12.5 mm新型2D数字伺服阀实验研究

针对原有2D数字伺服阀存在加工困难等问题，文章设计了新型的通径12.5 mm 2D数字伺服阀。分析了12.5 mm通径斜槽型2D数字伺服阀的工作原理、结构特性，设计了斜槽型的导控机构，不仅方便加工，而且使伺服阀的整体 性能得到很大提高。在此基础上设计并搭建了实验平台，在21 MPa的系统压力下对阀进行静动态实验研究。实验结果 表明该阀的线性度约为4. 1%，滞环约为1.9%，不对称度为3.1%，零位泄露量为5.60 L．min-1导控级的零位泄漏量为 0. 64 L．min-l，频宽为175 Hz（对应25%额定流量）。较之同样级别的伺服阀具有更好的动静态特性，结构更加紧凑。

Experimental Study on New 12.5 mm Diameter 2D Digital Servo Valve

Aiming at the original 2D digital servo valve difficult to process. this article designed a new 12. 5 mm diameter 2D digital servo valve. This article first analyzed the structure characteristics. the working principle of the 12. 5 mm diameter 2D digital servo valve with chute type guide and control mechanism. The valve innovatively designed the control mechanism of chute type guide, not only convenient for processing, but also make the whole performance of the servo valve greatly improve. On this basis, the experimental platform was built. Experimental studied under 21 MPa system pressure about the static and dynamic characteristics of the valve was carried out. The experimental results show that the valve linearity is 4. 1% , hysteresis is l. 9% , asymmetric degree is 3. 1% . leakage in zero place is 5. 60 L . min -'. guide controlling leakage in zero place is 0. 64 L . min-'. bandwidth is 175 Hz (corresponding t0 25% rated flow). It has better dynamic and static characteristics. and the structure is more compact compared to the same level of servo valve .