SEALING SYSTEM OF SECONDARY FLOW IN INLET FOR NOZZLE OF TURBO MACHINE HAVING AFTER-BURNING CHAMBER TO COOL MAIN FLAP OF TURBINE MACHINE

摘要

PURPOSE: A sealing system of a secondary flow is provided to loss of the engine efficiency by preventing the leakage of the secondary flowing between a passage of a flap and a circular channel. CONSTITUTION: An outer face of a circular duct is formed by a circular and flexible first gasket. The first gasket is compressed by sliding and contacting to the upper inner face of a flap(8) and the lower inner face of a casing(4) under the pressure of a secondary flow. An inner face of the duct is formed by a circular and flexible second gasket. An upstream end of the second gasket is fixed in a radial inner area of a diaphragm(6). A downstream end of the second gasket is slid and contacted against the upstream inner face of a heat-proof plate. Cooling air is supplied in a passage by the duct. Thereby, the leakage of the secondary flow between the passage of a flap and a circular channel is prevented.