Design and Application on Sealing of Hydraulic Lock Based on Servo Mechanism

In order to solve the seal problem both the cylinder chamber of the servo actuator in a severe environment, a new hydraulic lock was designed by applying new composite material PEEK and valve injection technology in this paper. The life test and the seal effect of that were carried out. The results implied that the cylinder chamber of the servo actuator was locked in any position. And the hydraulic lock has been applied on the launch vehicle successfully.