Propeller blade bearing, especially for propeller blades of aircraft propellers that can be adjusted along their longitudinal axis

US8057184B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventor

• Wilhelm Sebald · Bad Königshofen im Grabfeld, DE

Key dates

• Filing date: Dec 13, 2005
• Grant date: Nov 15, 2011
• Expiry date: Jan 3, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/72
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a propeller blade bearing, for the propeller blades of aircraft propellers that can be adjusted along their longitudinal axis, a plurality of propeller blades being individually fastened on a propeller hub in a corresponding number of blade seats. Every propeller blade, at its blade base, has a primary adjustable bearing and a secondary adjustable bearing and is received so as to be rotatable along its longitudinal axis inside a blade seat. The primary and the secondary adjustable bearing are configured as angular contact ball bearings that have respective upper bearing races and lower bearing races and rolling bodies interposed between said bearing races. A lubricating oil reservoir is arranged in the propeller hub and supplies the primary and the secondary adjustable bearing with lubricating oil when the propeller rotates. Every propeller blade is configured as a completely pre-assembled unit with the primary adjusting bearing and the secondary adjusting bearing. The upper bearing races of the primary and the secondary adjustable bearing are connected to respective lubricating oil overflow rings which axially enclose the lower bearing races on one side an…