| 摘要 |
A fan for a gas turbine engine comprises a hub and an annular array of fan blades mounted to the hub and extending radially outwardly from the hub, each of the fan blades comprises a blade root. The hub comprises a plurality of hub grooves having a shape complimentary to the shape of the blade root and each hub groove receives and radially retains one blade root. A slot is provided on the suction side and on the pressure side of each blade root. A plurality of keys is provided, each key engages with the slots in one blade root and with the corresponding hub groove so as to axially retain the fan blade. The key comprises two arms and a joining member, the two arms are received in the slots provided on the blade root and the joining member extends between the two arms. An interface is defined between the key arms and the slots in the blade root, and a greater or equal percentage of the interface is curved than is planar. Corresponding fan blade and manufacturing method are also provided. |
