US 4,251,185 AGranted

Expansion control ring for a turbine shroud assembly

AssigneeCaterpillar Tractor Co.

InventorKarl W. Karstensen

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Abstract

A turbine shroud assembly includes an expansion control ring to support segmented rotor shrouds. The expansion control ring is restrained by adjacent manifold rings, yet free to thermally expand radially outwardly without loss of axial alignment with the associated turbine wheel. The ported manifold rings are positioned on either side of an outwardly extending leg of the expansion control ring to direct cooling fluid delivered thereto toward the expansion control ring. A spacer ring surrounds the expansion control ring and restrains the expansion control ring relative to the manifold rings. The spacer ring maintains axial alignment of the expansion control ring with the turbine wheel. Cooling fluid is exhausted into the main hot gas stream, both upstream and downstream of the turbine wheel thus substantially preventing hot gases from affecting the expansion control ring.

Claims9

Dependent claims

A turbine shroud assembly comprising:

an expansion control ring defining an inner cylindrical surface;
manifold means for directing a cooling fluid toward preselected locations on said expansion control ring and means for coaxially supporting said expansion control ring relative to said manifold means under varying temperature conditions;
said expansion control ring defining a generally T-shaped cross-section, including a leg and a cross-bar portion, the upper surface of the cross-bar portion of the T forming the inner cylindrical surface, the leg extending radially outwardly from said cross-bar portion;
said manifold means comprising first and second manifold rings, said first and second manifold rings being positioned on opposite sides of the leg portion of the expansion control ring and each of said first and second manifold rings defining a plurality of fluid ports, said ports being oriented toward opposite sides of the leg portion of said expansion control ring.

1 more element

Dependencies are inferred from the claim text.