| 主权项 |
1. A device for chocking and retaining a dovetail root of a blade of a gas turbine engine in a corresponding axially-extending slot in the rim of a disc, the device including:
a retention body having a key portion receivable in a keyway formed in the base of the slot, and a mating portion for mating with a complementary mating portion of the root to prevent relative axial movement between the retention body and the root, the retention body having a lowered position in which the key portion is received sufficiently deeply in the keyway to allow the root to be positioned in the slot without interference from the retention body, and a raised position in which, after the root is positioned in the slot, a part of the key portion is still received in the keyway while the mating portion mates with the complementary mating portion of the root; a slider which is axially insertable in the slot; wherein the slider and the retention body are configured so that, on axial insertion of the slider in the slot after the root is positioned in the slot, the slider moves the retention body from its lowered position to its raised position, whereby the retention body urges the blade radially outwardly thereby mating flanks of the root to flanks of the slot, while the part of the key portion still received in the keyway retains the root axially in the slot. |
