servoventtiilejä

Servoventtiilejä, known in English as servo valves, are a type of control valve used in hydraulic and pneumatic systems to regulate fluid flow. They are characterized by their high precision and rapid response times, making them suitable for applications requiring accurate positioning and dynamic control. Servo valves typically employ a spool or poppet mechanism, actuated by an electrical signal through a torque motor or a solenoid. This electrical signal is often generated by a feedback loop, allowing the valve to continuously adjust its position based on sensor readings, ensuring the system maintains a desired state.

The operation of a servo valve involves converting an electrical input into a precise mechanical movement. In many designs, a small pilot valve, controlled by an electromagnetic coil, directs a portion of the main fluid flow to actuate the main spool. This pilot stage amplifies the control signal, allowing a small electrical current to control a much larger hydraulic flow. Feedback mechanisms, such as mechanical linkages or electrical transducers, monitor the spool's position and send this information back to the control system, enabling closed-loop control. This feedback ensures that the valve's output flow or pressure accurately matches the input command, even in the presence of disturbances or changing loads.

Servo valves are widely used in industrial automation, robotics, aerospace, and mobile equipment where precise control of motion and force is critical. Examples include machine tools, flight simulators, injection molding machines, and robotic arms. Their ability to provide proportional control of hydraulic power makes them indispensable for tasks requiring high accuracy and dynamic performance. The selection of a servo valve depends on factors such as flow rate, pressure, response time, and the required control accuracy.