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US 10,518,874 B2Granted
Multi-blade rotor for a rotary wing aircraft
AssigneeAirbus Helicopters Deutschland GmbH
InventorsGerald Kuntze-Fechner, Martin Ortner, Victoria Otto, Christeline Salmon, Eugen Rink, Rupert Pfaller
Life of this patent
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Abstract
A multi-blade rotor for a rotary wing aircraft, comprising a plurality of rotor that is connected to an associated rotor head via a plurality of flexbeam elements, wherein at least one flexbeam element of the plurality of flexbeam elements comprises an asymmetrical flexbeam root that is mounted to the associated rotor head.
Claims19
A multi-blade rotor for a rotary wing aircraft, comprising:
- a plurality of rotor blades that is connected to an associated rotor head via a plurality of flexbeam elements, wherein at least one flexbeam element of the plurality of flexbeam elements comprises an asymmetrical flexbeam root that is extending in a longitudinal direction of the flex-beam element and being approximately L-shaped or shoe-shaped and comprising a single-sided longitudinal extension oriented at least approximately towards the associated rotor head, the asymmetrical flexbeam root being mounted to the associated rotor head.
A flexbeam element for a multi-blade rotor of a rotary wing aircraft, comprising:
- an asymmetrical flexbeam root that is extending in a longitudinal direction of the flex-beam element and being approximately L-shaped or shoe-shaped and comprising a single-sided longitudinal extension oriented at least approximately towards the associated rotor head, the asymmetrical flexbeam root being adapted for mounting to the multi-blade rotor.
A multi-blade rotor for a rotary wing aircraft comprising:
- a rotor head;
- a plurality of rotor blades extending from the rotor head;
- a plurality of flexbeam elements, connecting the plurality of rotor blades to the rotor head, wherein each flexbeam element extends in a longitudinal direction between a rotor head connected to each rotor blade and an assymetrical flexbeam root connected to the rotor head, each assymetrical flexbeam root comprising:
- a longitudinal extension protruding in the longitudinal direction at least approximately towards a rotor mast offset from a central longitudinal axis of the flexbeam element;
- and
- a nested cavity opposite the longitudinal extension in a transverse direction, wherein the nested cavity is shaped to receive the longitudinal extension of an adjacent one of the plurality of flexbeam elements to define a nested configuration,
- wherein the nested configuration is adapted to limit lead-lag motion in an emergency.
4 more elements
Dependencies are inferred from the claim text.