Elastomeric damping device especially for the neck of helicopter wing blades

US4334825A · kind A · utility

Assignee

• Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung · DE

Inventors

• Dieter Braun · Spaichingen, DE
• Wolfgang Buchs · Valley, DE
• Andreas Kirchner · Wallenhorst, DE

Key dates

• Filing date: Jan 29, 1981
• Grant date: Jun 15, 1982
• Expiry date: Jan 29, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/51
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The neck of a hingeless helicopter rotor wing blade is provided with a damping device effective to dampen lead-lag movements of the rotor wing blade. For this purpose the damping device comprises at least two stiff plates secured to opposite sides of the blade neck by a plurality of elastomeric members glued or bonded to the respective stiff plate and to the blade neck at spaced intervals. The difference of deformation between the stiff plates and the blade neck causes a deformation of the individual members in directions substantially across the longitudinal blade direction (in lead-lag plane). The spacings between adjacent members are located where the damping action is inherently low.