초록 ▼

In a gas turbine engine having a ceramic nozzle guide vane supported by a metal turbine casing the radially outer end of the vane is provided with opposed frustoconical sections which converge towards each other onto a middle cylindrical section. A metal split ring surrounds the cylindrical section,

In a gas turbine engine having a ceramic nozzle guide vane supported by a metal turbine casing the radially outer end of the vane is provided with opposed frustoconical sections which converge towards each other onto a middle cylindrical section. A metal split ring surrounds the cylindrical section, and the radially inner and outer ends of the ring abut the frustoconical sections. The split ring is provided with a flange which cooperates with a groove structure on the turbine casing, thus enclosing the split ring to the casing. A bolt means fastens together two sections of the casing either side of the vane, thereby holding the split ring against the vane. On increase in temperature the split ring expands more than does the vane. The ends of the split ring therefore slide against the frustoconical surfaces of the vane to take up the expansion, and in so doing maintain contact with the vane.

대표청구항 ▼

A structure for supporting a first member having a first coefficient of linear thermal expansion by means of a second member having a second coefficient of linear thermal expansion greater than the first coefficient so as to maintain supportive contact between the members under conditions of differe

A structure for supporting a first member having a first coefficient of linear thermal expansion by means of a second member having a second coefficient of linear thermal expansion greater than the first coefficient so as to maintain supportive contact between the members under conditions of differential thermal expansion between the members, the structure comprising, (a) incorporated in the first member an intermediate section located on an axis between two further sections, the two further sections being each wider in a direction at right angles to the axis than the intermediate section in that direction, the intermediate section being connected to each said further section by a respective frustoconical transition surface, line extensions of each frustoconical surface meeting at a common point on said axis, and (b) a support member held by the second member and located between the second member and the first member in a region between said two further sections, the support member being shaped to abut said frustoconical transition surfaces and to move over said surfaces under conditions of relative thermal expansion of the first and second members, the support member having the second coefficient of expansion.