COOLED GAS TURBINE VANE ASSEMBLY
First Claim
1. A gas turbine vane comprising:
- an outer diameter pan affixed to an outer diameter platform, the outer diameter platform comprising;
a plurality of openings capable of receiving a plurality of cooling tubes;
an outer diameter platform trailing edge face spaced an axial distance from an outer diameter platform leading edge face;
a tube collar associated with the plurality of openings;
the plurality of cooling tubes extending radially inward from the outer diameter platform such that the tube collars are affixed to each of the plurality of cooling tubes and the corresponding opening;
a hollow airfoil extending radially inward from the outer diameter platform, the plurality of cooling tubes extending through the airfoil; and
,an inner diameter platform affixed to the hollow airfoil opposite the outer diameter platform such that the platforms are generally parallel to each other, the inner diameter platform comprising;
an inner diameter platform trailing edge face;
an inner diameter platform leading edge face;
a plurality of openings for receiving the plurality of cooling tubes;
a cover fixed to each of the plurality of cooling tubes proximate the inner diameter platform;
a forward pan affixed to a forward end of the inner diameter platform;
a plurality of film holes located in the inner diameter platform;
an aft cover affixed to an aft end of the inner diameter platform to form an aft cavity;
a meterplate affixed to the inner diameter platform adjacent to the forward pan, the meterplate having a plurality of holes located therein capable of restricting a cooling fluid flow to a desired pressure and mass flow for a region of the film holes positioned in the inner diameter platform and in fluid communication with the aft cavity;
an undercut located within the inner diameter platform, the undercut configured to reduce stiffness of the inner diameter platform.
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Accused Products
Abstract
A gas turbine vane to improve vane performance by addressing known failure mechanisms. A cooling circuit to the trailing edge of a vane airfoil is fed from the outer diameter platform, which prevents failure due to an oxidized and eroded airfoil trailing edge. The gas turbine includes an outer diameter platform, a hollow airfoil and an inner diameter platform with a plurality of cooling tubes extending radially through the airfoil. The cooling tubes are open at the outer diameter end and closed with covers at the inner diameter end. The inner diameter platform is also cooled and includes a meterplate for a portion of the cooling passageway and includes an undercut to improve thermal deflections of the inner diameter platform.
54 Citations
20 Claims
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1. A gas turbine vane comprising:
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an outer diameter pan affixed to an outer diameter platform, the outer diameter platform comprising; a plurality of openings capable of receiving a plurality of cooling tubes; an outer diameter platform trailing edge face spaced an axial distance from an outer diameter platform leading edge face; a tube collar associated with the plurality of openings; the plurality of cooling tubes extending radially inward from the outer diameter platform such that the tube collars are affixed to each of the plurality of cooling tubes and the corresponding opening; a hollow airfoil extending radially inward from the outer diameter platform, the plurality of cooling tubes extending through the airfoil; and
,an inner diameter platform affixed to the hollow airfoil opposite the outer diameter platform such that the platforms are generally parallel to each other, the inner diameter platform comprising; an inner diameter platform trailing edge face; an inner diameter platform leading edge face; a plurality of openings for receiving the plurality of cooling tubes; a cover fixed to each of the plurality of cooling tubes proximate the inner diameter platform; a forward pan affixed to a forward end of the inner diameter platform; a plurality of film holes located in the inner diameter platform; an aft cover affixed to an aft end of the inner diameter platform to form an aft cavity; a meterplate affixed to the inner diameter platform adjacent to the forward pan, the meterplate having a plurality of holes located therein capable of restricting a cooling fluid flow to a desired pressure and mass flow for a region of the film holes positioned in the inner diameter platform and in fluid communication with the aft cavity; an undercut located within the inner diameter platform, the undercut configured to reduce stiffness of the inner diameter platform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A flow restriction device capable of controlling a cooling fluid to an aft portion of an inner diameter platform of a gas turbine vane comprising:
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an aft cover fixed to the inner diameter platform forming an aft cavity; a meterplate fixed to the inner diameter platform between a forward pan and the aft cover, the meterplate having a plurality of feed holes; a plurality of film cooling holes located in the inner diameter platform and in fluid communication with the aft cavity; wherein the cooling fluid is capable of passing through the feed holes of the meterplate, into the aft cavity, and through the plurality of film cooling holes. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An inner diameter platform of a gas turbine vane capable of increased thermal deflection comprising:
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a gas path surface separated from a cold surface by a platform thickness; a forward pan and an aft cover fixed to the cold surface; and
, the platform thickness having an undercut extending a distance along a trailing edge face of the inner diameter platform and through a portion of the platform thickness, such that the undercut reduces stiffness of the inner diameter platform adjacent to the aft cover. - View Dependent Claims (18, 19, 20)
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Specification