拨叉式与齿轮齿条式执行机构的选型分析

Type Selection Analysis of Fork and Rack and Pinion Actuators

对于控制阀选择适合的执行机构是非常重要的,如执行机构过大,阀杆可能受力过大,相反如执行机构过小,则不能产生足够的力矩来充分操作阀门。拨叉式与齿轮齿条式是气动角行程活塞执行机构,本文将对比介绍两种类型执行机构的结构特点,组成零部件、适用工况等。

It is very important to select a suitable actuator for the control valve.If the actuator is too large,the valve stem may be subjected to too much force.On the contrary,if the actuator is too small,it cannot produce enough torque to fully operate the valve.Fork type and rack and pinion type are pneumatic angular stroke piston actuators.This paper will compare and introduce the structural characteristics,components and applicable working conditions of the two types of actuators.