Patent ID: 7594792

Claim:
A turbomachine assembly comprising: a first ring part of a ring portion and a second ring part of the ring portion, said ring portion separating a high temperature gas stream from an outer enclosure, wherein said first and second ring parts define a functional axial clearance; a component, having a portion in an immediate environment of said functional axial clearance; and a sealing device associated with the functional axial clearance, wherein said sealing device comprises an annular plate wound up on itself over several turns in a spiral and is free of gaps so that said plate prevents air of the gas stream from passing into the outer enclosure via said axial clearance, wherein said several turns form windings that are slidable against one another thereby providing a pliancy to said annular plate such that said pliancy allows said annular plate to adapt to relative displacement of said first and second ring parts, said annular plate covering said functional axial clearance so as to impede said air of the high temperature gas stream from passing into the outer enclosure via said axial clearance, said annular plate having a first longitudinal edge positioned on a first side facing the first ring part and a second longitudinal edge positioned on a second side facing the second ring part, wherein the first longitudinal edge is curved radially outwards towards the outer enclosure, and wherein the second longitudinal edge includes a shoulder with a concave surface that contacts said portion of said component in the immediate environment of said functional axial clearance, and wherein said shoulder and a thickness of said annular plate are such that said annular plate is held in position by contact between said component and said second ring part.