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    • 10. 发明授权
    • Supplemental seal for the chordal hinge seals in a gas turbine
    • 燃气轮机中的弦铰链密封的补充密封
    • US06752592B2
    • 2004-06-22
    • US10029003
    • 2001-12-28
    • Abdul-Azeez Mohammed-FakirMahmut Faruk AksitAhmad SafiSrikanth VedantamNing Fang
    • Abdul-Azeez Mohammed-FakirMahmut Faruk AksitAhmad SafiSrikanth VedantamNing Fang
    • F01D904
    • F16J15/0887F01D11/005F02C7/28
    • In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner bands of the nozzle segments on a lower pressure side of the chordal hinge seals. To minimize or prevent leakage flow across the chordal hinge seals, a generally U-shaped supplemental seal having reversely folded U-shaped marginal portions is received in a cavity formed in the axially extending sealing surface of the inner rail of the nozzle segment. At operating conditions, the marginal portions seal against the base of the cavity and the annular sealing surface of the nozzle support ring to prevent leakage flow past the chordal hinge seal from entering the hot gas path. To install the supplemental seal, the seal is first compressed and maintained in a compressed state by applying one or more wraps about the supplemental seal or an epoxy to secure the seal when compressed in the cavity. At operating temperatures, the retention means releases the seal to engage marginal portions against opposite sealing surfaces of the nozzle segment and support ring.
    • 在具有在每个喷嘴段的内轨道和喷嘴支撑环的环形轴向面对的密封表面之间具有弦状铰链密封件的燃气涡轮机中,在较低压力下在支撑环和喷嘴段的内带之间设置补充密封 侧面铰链密封。 为了最小化或防止跨弦铰链密封件的泄漏流动,具有反向折叠的U形边缘部分的大致U形补充密封件容纳在形成在喷嘴段的内轨道的轴向延伸的密封表面中的空腔中。 在操作条件下,边缘部分密封在空腔的底部和喷嘴支撑环的环形密封表面上,以防止通过弦状铰链密封件的泄漏流进入热气路径。 为了安装补充密封件,首先将密封件压缩并保持在压缩状态,通过在补充密封件或环氧树脂周围施加一个或多个包装件以在压缩在空腔中时固定密封件。 在操作温度下,保持装置释放密封件以将边缘部分接合在喷嘴段和支撑环的相对的密封表面上。