Integral clearance control impingement manifold and environmental shield
AssigneeGeneral Electric Company
InventorsJulie A. Ritchie, Joseph H. Schleue, Jeffrey Glover, Frederick W. Tegarden
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Abstract
Clearance control is provided by a shaped, integral environmental shield and circumferentially segmented cooling manifold. Each manifold has impingement rails located radially outside selected components of the stator casing. Cooling air is directed onto stator components and returns immediately through circuitous paths to improve uniformity of cooling. The structure incorporates the environmental shield into a two piece bonded structure to facilitate construction and assembly.
Claims14
An integral environmental shield and impingement manifold for a gas turbine engine comprising:
- a plurality of arcuate manifold segments connected in generally circumferentially abutting relationship to form a generally annular manifold centered around an axis thereof, wherein each said manifold segment comprises:
- a first sheet of formed metallic material;
- a second sheet of formed metallic material bonded in face to face relationship to said first sheet at predetermined locations to provide a pattern of generally hollow passages between said first and second sheets surrounded by bonded areas of said sheets;
- and
- wherein said hollow passages include;
- at least one generally circumferentially extending hollow, arcuate impingement rail having a plurality of impingement passages through the radially inner one of said sheets for supplying cooling air onto a generally circular surface of an object disposed adjacent and radially inside said impingement rail;
- and
- at least one generally circumferentially extending, hollow baffle section having a first set of exhaust passages through said radially inner one of said sheets and a second set of exhaust passages through said second one of said sheets offset from said first set of exhaust passages.
An integral environmental shield and impingement manifold comprising:
- a first sheet of formed material;
- a second sheet of formed material bonded in face to face relationship to said first sheet at predetermined locations to provide a pattern of facing unbonded areas of said sheets surrounded and sealed by bonded areas;
- and
- wherein said unbonded areas include:
- at least one elongated hollow impingement rail having a plurality of impingement passages through one of said sheets for supplying cooling air to an object disposed adjacent said impingement rail;
- and
- at least one hollow elongated baffle section having a first set of exhaust passages through said one of said sheets and a second set of exhaust passages through said second one of said sheets offset from said first set of exhaust passages.
Dependencies are inferred from the claim text.