Cloth seal for an inner compressor discharge case and methods of locating the seal in situ
First Claim
1. An inner compressor discharge case for a gas turbine, comprising:
- a cylindrical barrel formed of upper and lower halves joined to one another at margins thereof along a horizontal midline to form a pair of diametrically spaced joints along opposite sides of the barrel, each of said margins having a groove extending generally parallel to an axis of the cylindrical barrel, the grooves of opposed margins of said halves on respective opposite sides of the barrel lying in registration with one another along the horizontal midline;
a seal disposed in each pair of registering grooves;
each said seal including a shim having a pair of sealing surfaces for sealing against surfaces of said registering grooves, respectively; and
a metallic cloth secured along at least one side of said shim and between said sealing surfaces thereof.
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Accused Products
Abstract
Upper and lower halves of the inner barrel of a compressor for a turbine are bolted to one another along a horizontal midline joint with metal-to-metal surface contact. Elongated grooves are provided in the engaging surfaces, with the upper groove having a depth greater than the depth of the lower groove. Elongated seals are provided in the grooves, including an elongated shim with a metallic woven covering on opposite sides, and margins having sealing edges. The depth of the seal is equal to or less than the depth of the upper groove and an adherent material maintains the seal in the upper groove during installation. In operation, the adherent material dissolves at temperatures above ambient and the seal drops by gravity to bear against the walls of the grooves in response to high pressure air leaking through any gap at the horizontal midline joint.
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Citations
20 Claims
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1. An inner compressor discharge case for a gas turbine, comprising:
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a cylindrical barrel formed of upper and lower halves joined to one another at margins thereof along a horizontal midline to form a pair of diametrically spaced joints along opposite sides of the barrel, each of said margins having a groove extending generally parallel to an axis of the cylindrical barrel, the grooves of opposed margins of said halves on respective opposite sides of the barrel lying in registration with one another along the horizontal midline;
a seal disposed in each pair of registering grooves;
each said seal including a shim having a pair of sealing surfaces for sealing against surfaces of said registering grooves, respectively; and
a metallic cloth secured along at least one side of said shim and between said sealing surfaces thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An inner compressor discharge case for a gas turbine, comprising:
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a cylindrical barrel formed of upper and lower halves joined to one another at margins thereof along a horizontal midline to form a pair of diametrically spaced joints along opposite sides of the barrel, each of said margins having a groove extending generally parallel to an axis of the cylindrical barrel, the grooves of opposed margins of said halves on respective opposite sides of the barrel lying in registration with one another along the horizontal midline; and
a seal disposed in each pair of registering grooves;
each said seal including a metal plate having a pair of sealing surfaces for sealing against surfaces of said registering grooves, respectively, one of said sealing surfaces including an edge of said plate extending out of a plane containing said plate for sealing against a surface of one of said registering grooves, another of said sealing surfaces including another edge of said plate having an arcuate portion for sealing against a surface of another of said registering grooves. - View Dependent Claims (14, 15, 16)
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17. A method of locating a seal along registering faces of first and second mating parts of a gas turbine, comprising the steps of:
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providing a first groove having a first depth in a registering face of said first part;
providing a second groove having a second depth in a registering face of said second part, the depth of said first groove being in excess of the depth of said second groove;
providing a seal having a depth equal to or less than the depth of said first groove and greater than the depth of said second groove;
retaining said seal in said first groove during installation of the seal and releasing the seal from said first groove, enabling the seal to locate in said first and second grooves, spanning the joint between the mating parts. - View Dependent Claims (18, 19, 20)
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Specification