WOODWARD 5437-1080 Speed Regulator Electro-Hydraulic Converter
The WOODWARD 5437 - 1080 is an electro - hydraulic converter for speed regulators, which is mainly used to convert electrical signals into hydraulic signals to control the speed of turbines or other rotating equipment. Here is a detailed introduction:
- Electrical - Mechanical Conversion: The electro - hydraulic converter receives an electrical control signal, usually in the form of a 4 - 20 mA current signal. This signal acts on the servo torque motor inside the converter. The servo torque motor is equipped with a double - coil electromagnet. When a current passes through the coil, a magnetic field is generated, causing the armature of the torque motor to move.
- Mechanical - Hydraulic Conversion: The movement of the torque motor armature is transmitted to the nozzle - baffle mechanism. As the baffle moves, the oil pressure on both sides of the nozzle changes, which in turn causes the four - way slide valve to displace. The movement of the slide valve controls the oil pressure on both sides of the servo piston, thereby driving the servo piston to move. The movement of the servo piston changes the control oil pressure that drives the steam regulating valve, adjusts the steam flow, and ultimately controls the turbine speed.
- High - Precision Components: It is composed of high - precision components such as servo torque motors, centering springs, four - way slide valves, and double - acting servo pistons. These components ensure the accuracy and reliability of the conversion from electrical signals to hydraulic signals.
- Sealed Housing: Usually, it has an aluminum - alloy housing and stainless - steel internal components. The sealed housing can protect the internal components from the external environment, improve the stability and durability of the device, and is suitable for use in various industrial environments.
