Axial flow machine, particularly a blower, with adjustable rotor blades

摘要

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. Oil flow passages through the peripheral wall transmit oil into the annular groove at the swing levers for lubricating the slide blocks. Each swing lever has a collecting chamber and a communicating passage between the collecting chamber and the surface of the swing lever inside the slide block. The housing of the machine may be oriented with its axis horizontal or vertical and the adjustment part has appropriate walls and connecting tubes for assuring flow of lubrication through the peripheral wall and to the swing lever for the slide block and also for lubricating the groove for the slide blocks.