| 摘要 |
A mounting device used for a variable pitch blade 1 in a rotary hub of a propeller 2, rotatable about the axis of the blade "B". Rotation is by means of three bearings, one oblique contact ball bearing "R2" and two roller bearings "R1 and R3". The bearings are arranged in the hub 2. The ball bearing "R2" may be sited between the roller bearings, and balls 13 inserted into the hub via a filling passage 35 between the external and internal portion of the hub. The exterior bearing race may be integral with the hub, the internal bearing race may be integrated with a skirt 16 surrounding the blade foot. Bearings may be pre-tensioned in the radial direction, and rollers may be guided by grooves 32. The assembly may include removable fixing means 41 that limit the axial movement, and facilitate release of balls through filling passage 35, and dismantling of the blade skirt 16 in the axial direction when fully removed. |
