To provide a holding structure of a fan blade which can surly prevent a fan blade from coming off from a disk even though axially forward load acts at the rupture of a fan blade and which materializes high prediction accuracy of stress, easy design and the reduction in parts count, weight and cost by reducing the weight, size and number of fastening bolts.
A disk 10 includes a plurality of dovetail grooves 12 disposed in the circumferential direction at a certain angular interval and extending along an axial direction. A fan blade 20 is provided with a dovetail part 22 which can transmit to the disk the centrifugal force when being axially fitted in the dovetail groove to be rotated, and with a projection 24 which is situated backward from the dovetail part 22 and projected circumferentially outward. The projection 24 is set to have a size not to interfere with the dovetail groove 12 when the dovetail part 22 is situated radially inward from the dovetail groove 12.
COPYRIGHT: (C)2007,JPO&INPIT
| JPH10299407A | 1998-11-10 | |||
| JP2002221003A | 2002-08-09 |
| US5540552A | 1996-07-30 |
Yasuharu Nakasone
Toshihiro Nomura