Patent ID: 8137056
Filing Date: 2012-03-20
Classification: F01D,F05D

Abstract:
1. An impingement cooled structure comprising: (a) a plurality of shroud members disposed in a circumferential direction to constitute a ring-shaped shroud surrounding a hot gas stream; and (b) a shroud cover mounted on radial outside faces of the plurality of shroud members to form a cavity therebetween, wherein the shroud cover has a first impingement cooling hole formed therein that communicates with the cavity and allows cooling air to be jetted toward a bottom surface of the cavity so as to cool the bottom surface of the cavity by impingement, wherein each shroud member of the plurality of shroud members has a hole fin, wherein the hole fin extends in a radial outward direction from the bottom surface of the cavity toward an inner surface of the shroud cover, and the hole fin divides the cavity in the hot gas stream into a first plurality of sub-cavities, and the hole fin has a second impingement cooling hole formed obliquely relative to a bottom surface of a first sub-cavity so that the second impingement cooling hole allows the cooling air having flowed through the first impingement cooling hole to be jetted obliquely toward the bottom surface of the first sub-cavity adjacent thereto.