| 摘要 |
There is disclosed an annulus filler for mounting to a rotor disc (21) of a gas turbine engine and for bridging the gap between two adjacent blades attached to the rotor disc. The annulus filler comprises: a lid (34) defining part (35) of an airflow surface for air drawn through the engine; a separate support (20) which is connectable to the lid and to the rotor disc so as to support the lid on the rotor disc with at least one engagement portion (24) of the support extending radially past a substantially adjacent region (50) of the lid; and a separate retainer (46) configured to interconnect the lid and the support by engaging the or each engagement portion of the support and adjacent regions (50) of the lid, the retainer defining another part (47) of said airflow surface. A preferred form of the annulus filler is configured to allow a procedure for mounting the annulus filler to the rotor disc, in which the support is first connected to the rotor disc without the lid, and then the lid is mounted to the support such that the or each engagement portion remains visible from the radially outermost side of the lid. It has been found that such an arrangement reduces the risk of the annulus filler being incorrectly mounted to the rotor disk.
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