| 摘要 |
A rotor blade root portion 108 is attached to a blade mounting 126 by a plurality of root fittings 102. The blade root 108 comprises a plurality of apertures 104 radially through the wall thickness, which receive a barrel 110 and a tensioning fastener (nut) 130 attached to a threaded portion 128 of the root fitting 102. The apertures 104 are preferably sized to be able to receive a tension adjuster 132. A tension adjuster e.g. hydraulic jack 252 may be used between the blade root 208 and the blade mounting 226 to tension the root fittings 202. Second tensioning fasteners 238, which are located in threaded recesses 236 in the blade root may then be adjusted to provide a blade abutment surface, and maintain the pre-load in the root fittings 202. A clamp (figure 3) may be used to limit creep in the blade material in the vicinity of the barrels. |
