Temperature control device for gas turbines
First Claim
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1. A gas turbine shroud including a casing and an abradable member mounted on an annular support, said support comprising:
- a first annular shell having an interior wall portion;
a flexible annular wall interconnecting said first shell to said turbine casing;
a second shell mounted inside said first shell for bracing said first shell and for receiving compressed air so as to brace said first shell; and
means for circulating air between said first and second shells so as to cool said first and second shells and for circulating air along said interior wall portion of said first shell onto said abradable member so as to cool said abradable member by impingement with air.
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Abstract
A portion of the stator of a gas turbine known as turbine shroud, which isituated radially opposite the mobile vanes of a turbine stage includes an "abradable" member supported by a first shell braced by a second shell and connected with turbine casing 2 by a thin, i.e. flexible, annular wall member embedded in a casing. Cooling air inflates the second shell so as to brace the exterior shell and circulates between the two shells so as to cool them and also cools the "abradable" member by impingement. The present invention is applicable to aviation turbojets.
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Citations
7 Claims
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1. A gas turbine shroud including a casing and an abradable member mounted on an annular support, said support comprising:
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a first annular shell having an interior wall portion; a flexible annular wall interconnecting said first shell to said turbine casing; a second shell mounted inside said first shell for bracing said first shell and for receiving compressed air so as to brace said first shell; and means for circulating air between said first and second shells so as to cool said first and second shells and for circulating air along said interior wall portion of said first shell onto said abradable member so as to cool said abradable member by impingement with air. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification