Control valve with integrated electrohydrodynamic actuator

摘要

A compact fuel control valve is presented where a hydraulic manifold is used as both a valve bonnet and an actuator seat for the valve actuator. The valve body has a fuel inlet, a fuel outlet and a metering plug opening. A metering plug guide mounted within the metering plug opening and attached to the hydraulic manifold forms a thermal barrier between the valve body and the hydraulic manifold to protect lower temperature components from high temperature gaseous fluids. A valve metering plug is directly coupled to the valve actuator piston. The hydraulic manifold maintains barriers between the hydraulics and the gaseous fuel with redundant seals and leakage paths. An intermediate vent within the hydraulic manifold routed to atmosphere further maintains physical separation of the gas and hydraulic system.