Abstract: In an axial blower, a plurality of blades are disposed around a hub and each blade is supported on a respective strut which is rotatable in a pair of radially separated bearings. An axially displaceable disk in the hub is connected with the blades for rotating them. The drive shaft for the rotor is hollow and delivers oil to the disk which in turn delivers it to the rotation levers of the struts. The oil moves successively to the bearings radially outward of the disk and accumulated oil is collected by a scoop at the radially outer bearing. The collected oil is delivered to a collection chamber and is recirculated by a pump back to the hollow shaft. An additional cooling circuit may be provided.

Abstract: An axial flow machine particularly a blower, has rotor blades external to a housing and each blade is supported by a respective strut which is rotatable about its respective strut axis to adjust the orientation of the blades. A respective crank-like swing lever attached to each strut is movable to rotate the strut. Each swing lever has a slide block at the end thereof which is carried in the annular peripheral groove of an axially movable adjustment part. As the adjustment part is displaced axially, the swing levers rotate in their slide blocks. The invention is concerned with lubricating the rotation of the swing levers in the slide blocks. The adjustment part is at least partly inundated by an oil supply held in the housing. The adjustment part is scoop shaped. The rim of the adjustment part includes an annular peripheral wall on the exterior of which the peripheral groove is defined.