伺服阀阀口棱边几何精度的研究

Geometric precision of servo-valve lip

液压伺服控制部件电液伺服阀的核心是由阀芯阀套组成的滑阀副，而滑阀副阀口棱边的几何精度直接影响着它的工作性能，在对阀口棱边的几何精度检测方法研究的基础上提出了在宏观和微观上检测阀口棱边几何精度的两种新方法，分析了伺服阀棱边加工精度的现状及造成误差的因素，提出棱边质量标准应该包括棱边的几何形状误差即棱边的粗糙度、棱边的圆角以及棱边的宏观几何形状即棱边端向跳动误差等方面，指出建立科学的棱边几何形状精度质量标准是保证滑阀阀口工作棱边加工精度的先决条件，采用高精度阀口加工质量测量方法是保证阀口棱边加工质量的重要条件之一。

The core of the elctro-hydraulic servo valve is a valve core and a valve set, and the geometric precision of its lip has a direct influence on its performance. Two new macro and micro methods are proposed for measurement of geometric accuracy of lips. The present status of lip manufacturing and causes for errors are reviewed. The geometric shape error, namely roughness roundness and macro geometric shape should be specified in measuring standards.