Bearing plates for heads of axial rivets securing turbine blades to a rotor disc

摘要

Each blade 3 is connected, via its base 5, which is profiled in a tooth-like manner, to a correspondingly shaped groove (6) of a disc rim 2. An axial slit S is formed between the base end of a turbine blade and the groove floor. A rivet 7 is disposed in the longitudinal direction of the axial slit S, the rivet having a retaining head 8 and a closing head 9 each of which accommodate a bearing plate 10, 11 which engages both the blade base and the disc rim. Other embodiments include axial guides within the slit to centre the rivet and angling the rivet to the longitudinal direction. The bearing plates minimise the risk to the expensive disc during attachment of the rivets.