STATIC SEAL STRUCTURE

• US 3,750,398 A
• Filed: 05/17/1971
• Issued: 08/07/1973
• Est. Priority Date: 05/17/1971
• Status: Expired due to Term

• Current Assignee: James A. Laurelli, Richard S. Adelizzi
• Original Assignee: James A. Laurelli, Richard S. Adelizzi
• Inventors: Adelizzi, Richard S., Laurelli, James A.
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Olsen, Warren
• Application Number:
  US05/143,774
• Time in Patent Office: 813 Days
• Field of Search: 60/39.32,39.37 415/171,175,136
• US Class Current: 60/39.37
• CPC Class Codes: F01D 9/023 Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings

Abstract

A static seal structure in a gas turbine which prevents leakage of pressurized compressor air from a plenum chamber into the first stage of the turbine around the combustion chambers. The structure comprises two semicircular frame halves, which have openings to receive the combustion chambers. The radially outer portion of the frame is secured to the turbine casing and statically seals around the radially outer portions of the combustion chambers and the radially extending sides between adjacent combustion chambers. The radially inner portion of the frame is secured to an annular seal member which cooperates with an annular seal housing structure to statically seal around the radially inner surfaces of the combustion chambers.

Claims

1. A static seal structure for an axial flow gas turbine, said turbine having a casing structure enclosing a plenum chamber, a plurality of combustion chambers disposed in an annular array in said plenum chamber, each of said combustion chambers having a generally axial transition member at one end thereof to direct hot motive gases from the combustion chamber to a first stage of the turbine, a generally annular frame structure disposed between the plenum chamber and said first stage, said frame structure having a plurality of openings corresponding in shape and position to said transition members and each transition member extending through one of said openings, said frame structure closing the spaces between adjacent transition members, an annular seal member secured to the radially inner edge of the frame structure, an annular seal housing structure cooperating with said seal member to prevent leakage from the plenum chamber past the edge of the frame, said frame structure being divided into two spaced halves along a plane intersecting one of said openings, and a sealing member covering and sealing at least a portion of each of the spaces between halves of the frame, said last-mentioned sealing members each being secured to one of said halves on the plenum chamber side thereof.

2. The structure of claim 1 in which the spaces between halves of the frame structure extend radially, and said frame structure is mounted on the casing structure in a manner such that the casing structure covers the radially outer portions of said spaces.

3. The structure of claim 2 in which the casing structure is divided into two halves on a horizontal pLane and the frame structure is divided into halves on a plane inclined to the horizontal.