FLUID-COOLED INJECTOR

摘要

An injector for delivery of a fluid into a stream of hot gas is disclosed. T he injector has a valve body with an elongated chamber in fluid communication with an orifice. A valve seat surrounds the orifice. A valve plunger is disposed within the chamber, an end of the plunger being adapted to sealingly interengage the seat. The plunger is slidably movable between an open and a closed position to open and close the orifice. A fluid inlet and outlet cool the valve by circulatin g fluid in an annular fluid passageway in the chamber adjacent to the valve seat. A portion of the fluid is expelled through the orifice when the valve is opened. The plunger is biased closed, being movable into the open position by an actuator. The injector is mounted on an exhaust conduit in fluid communication with the exhaust gases. A heat shield surrounding the orifice is interposed between the exhaust gases and t he valve body. A radiant heat reflector is positioned between exposed parts of the injector and the exhaust conduit. An atomizing hook fac es the orifice to control the dispersion characteristics of the expelled fluid.