Flexbeam unit for a hingeless or a hinge and bearingless multi-blade rotor of a rotary wing aircraft

US9751623B2 · kind B2 · utility

Assignee

• AIRBUS HELICOPTERS DEUTSCHLAND GMBH · DE

Inventor

• Rupert Pfaller · Riemerling, DE

Key dates

• Filing date: Jan 12, 2015
• Grant date: Sep 5, 2017
• Expiry date: Dec 30, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/33
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A flexbeam unit for a multi-blade rotor of a rotary wing aircraft, the flexbeam unit comprising a plurality of flexbeam elements that define a predetermined number of torsion elements and a ring-shaped connection zone for attachment to a rotor hub associated with a rotor shaft of the multi-blade rotor, each flexbeam element passing the ring-shaped connection zone in a tangential manner and uninterruptedly connecting a first torsion element to a second torsion element of the predetermined number of torsion elements, wherein each flexbeam element overlaps at least one in the circumferential direction of the ring-shaped connection zone immediately following flexbeam element and is overlapped by at least one in the circumferential direction of the ring-shaped connection zone immediately preceding flexbeam element.