SHROUD ASSEMBLY FOR A GAS TURBINE ENGINE

摘要

An assembly for mounting a circumferential shroud to a casing, including a plurality of arcuate shroud segments collectively forming the circumferential shroud. Each segment includes a circumferentially extending wall and a channel extending from the wall. The channel is receivable in a hole passing through a circumferential casing and has a first connector. A fastener has a head and a shank, which is receivable in the channel and has a second connector that engages with the first connector. A first spacer receives the channel and a second spacer receives the shank and sit adjacent the head of the fastener on either side of the casing. The spacers can be selected to adjust for optimal radial positioning of the shroud and of probes received within a space defined between the casing and the shroud for monitoring rotor speed and the tip air gap of a turbine rotor contained in the casing.

主权项

1. A circumferential shroud assembly for mounting to a casing, the assembly comprising; a plurality of arcuate shroud segments collectively forming the circumferential shroud, each segment comprising a circumferentially extending wall and a channel extending radially outwardly from the wall, the channel configured to be receivable in a hole passing through the casing and having, at an end distal to the wall, a first connector; a fastener having a head and a shank, the shank configured to be received in the channel and having a second connector configured to engage with the first connector of the channel; a first spacer configured to receive the channel and a second spacer configured to receive the shank and sit adjacent the head of the fastener, the spacers to be arranged, in use, either side of the casing, and a retainer for holding the first spacer against a radially inwardly facing surface of the casing.