Patent ID: 6406256
Filing Date: 2002-06-18
Classification: F01D

Abstract:
A device for the controlled setting of a radial gap between a rotor arrangement and an annular array of circumferentially surrounding shroud assemblies in a turbomachine,wherein the shroud assemblies include a shroud carrier and at least one shroud segment connectable to the shroud carrier via at least two holding webs, wherein the two holding webs are spaced from one another on the shroud segment and engage at least partially into countercounters within the shroud carrier; wherein the rotor arrangement including at least one row of radially outwardly extending rotor blades rotatable about an axis of rotation, such that the radial gap is formed between the ends of the rotor blades and the shroud segments without external drive means; wherein at least one holding web portion engaging at least partially into countercontours within the shroud carrier wherein said inclined holding web portion is inclined at an angle &agr; relative a tangent line, tangent to an inner surface of said shroud carrier at a point approximately where said at least one holding web intersects said inner surface of said shroud carrier, and wherein 0Â°90Â°wherein the at least one holding web is mounted so as to be moveable relative to the shroud carrier within the countercontour of the shroud carrier as a result of longitudinal thermal expansion of the shroud segment, thereby moving the inclined holding web portion along the countercontour of the shroud carrier and reducing the gap.