Through the design of the scheme, it is determined that the electro-hydraulic servo control system is composed of the machine, the electric and the liquid

Oil source

Hydraulic lock

servo controller

servo valve

Cylinder

Crank mechanism

Valve plate

position sensor

The instruction signal sent by the automatic control system, compared to the actual position signal and the cylinder in the servo controller, an error signal after amplification, into the electro-hydraulic servo valve, servo valve according to a certain proportion of the electrical signal into a flow of hydraulic oil to drive the oil cylinder and the feedback signal sent by the position sensor is changing, and the command signal is equal to the cylinder stop, stop at the specified location, is stable in turbine blade opening.

The linear movement of the cylinder is changed by a set of crank into the rotating motion of the valve plate, and the working angle of the valve plate or the stationary vane is changed.

Through the above analysis shows that, with the changing of the system signal, a turbine stator vane opening will continue to change, and by the change of static opening, to control the speed, gas flow control, control of turbine output to.