Patent ID: 6382905
Filing Date: 2002-05-07
Classification: F01D,F04D,F05B,F05D,Y02T

Abstract:
A casing for surrounding a rotatable turbomachine member that includes a rotor and a plurality of substantially radially-extending, circumferentially spaced rotor blades, said casing comprising:a. an annular outer shell formed from a material having a first coefficient of thermal expansion; b. an annular inner liner carried within and spaced radially inwardly of the outer shell and substantially coaxial therewith, the annular inner liner formed from a material having a second coefficient of thermal expansion that is lower than the first coefficient of thermal expansion and capable of radially expanding and radially contracting relative to the outer shell as a result of changes in inner liner temperature, the annular liner surrounding and spaced radially outwardly from outer tips of the rotor blades by a predetermined distance to limit gas flow between the rotor blade tips and the inner liner; c. a plurality of substantially radially inwardly extending support members fixedly carried by the outer shell and extending at least partially into substantially radial openings carried by the inner liner to support the inner liner against axial and rotational movement relative to the outer shell, and to allow relative radial sliding movement between the outer shell and the inner liner along the support members and without relative rotation between the support members and the inner liner.