介绍了一种新型的压力先导控制伺服阀，该阀的功率放大级采用双阀芯结构代替传统单阀芯结构。
A new servovalve using a pressure control pilot state was introduced, which USES two spools instead of single spool in power magnifying stage.
滑阀是由阀芯和阀套两部分组成，通常用作电液伺服阀的功率放大级，其精度要求高，加工难度大。
Spool valve is composed of valve spool and valve sleeve, and as the power stage of servo valve, it has a high degree of accuracy and is difficult for machining.
一个离合器的作用是给最后一级传动机构，即作为主功率放大器的绞盘，提供正向力矩。
Actuation of one clutch provides positive torque to the final drive, the capstan acting as the main power amplifier.
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