Principle of valve block

After program design, it is determined that the electro-hydraulic servo control system is composed of machine, electricity, and hydraulic. The command signal issued by the automatic control system is compared with the actual position signal of the oil cylinder in the servo controller, and the error signal is amplified and sent to the electricity. Hydraulic servo valve, the servo valve converts the electric signal into hydraulic oil flow according to a certain proportion to push the oil cylinder to move. The feedback signal sent by the position sensor changes continuously until it is equal to the command signal, the oil cylinder stops moving, that is, stops at the specified position , It is through the calm leaf that is stable at this opening. The linear motion of the oil cylinder is transformed into a rotary motion of the valve plate through a set of cranks, which changes the working angle of the valve plate or the stator blade. The above analysis shows that with the continuous change of the system signal, the opening of the transparent vane will also continue to change, and through the change of the opening of the vane, the purpose of controlling the number of revolutions, controlling the gas flow, and controlling the turbine output is achieved.