Patent ID: 8057184

Claim:
A propeller blade bearing arrangement for longitudinally axially adjustable propeller blades of aircraft propellers, comprising: a propeller hub, to which a plurality of propeller blades are individually fastened in a corresponding number of blade receptacles of a blade carrier ring, each propeller blade has, at its blade root, a primary adjustment bearing and a secondary adjustment bearing and is longitudinally axially mounted within a blade receptacle so as to be rotatable, both the primary adjustment bearing and the secondary adjustment bearing are designed as angular rolling bearings which are arranged so as to be longitudinally axially spaced apart from one another and are braced against one another, the primary and the secondary adjustment bearing has in each case one upper race and one lower race and also rolling bodies which are arranged between said races, a lubricating oil reservoir is arranged in the propeller hub, from which lubricating oil reservoir the primary and the secondary bearings are supplied with lubricating oil by means of centrifugal force as the propeller rotates, wherein each propeller blade is designed as a fully pre-assembled modular unit with the two races and the rolling bodies of the primary adjustment bearing and of the secondary adjustment bearing, which modular unit can be screwed in the blade receptacle of the blade carrier ring in a lubricating-oil-tight fashion by means of an upper ring nut which is formed with a seal with respect to the blade root of the propeller blade, with the upper races of the primary and of the secondary adjustment bearing are connected to lubricating oil surge rings which enclose the lower races of said primary and of said secondary adjustment bearing axially at one side, by means of which lubricating oil surge rings the lubricating oil, which rises out of the lubricating oil reservoir in the propeller hub as a result of centrifugal force as the propeller blades rotate, can be stored largely within the adjustment bearings, and by means of which lubricating oil surge rings, in conjunction with a defined filling quantity in the lubricating oil reservoir, the lubricating oil bears in only a small quantity and almost unpressurized against the seal of the upper ring nut.