Rotor carrier structure with a damper device for avoiding unstable coupling between resonant vibration modes
First Claim
1. A carrier structure for a rotor of a flying machine, the carrier structure comprising:
- a mounting structure supported by an airframe and suitable for being engaged with the rotor, the mounting structure including a gearbox having a top portion adjacent to the rotor and a bottom portion adjacent to the airframe and connected in a rigid manner to the rotor mast, the rotor having a rotor mast and a rotor head with elements between the bottom portion and the rotor head being rigid, the mounting structure having a plurality of suspension bars connecting the top portion of the gearbox to the airframe, and a plurality of fastener elements rigidly connecting the bottom portion of the gearbox to the airframe; and
an anti-coupling vibration-damper mechanism connected to the gearbox and configured to act as a resonator to prevent aeroelastic instabilities due to vibrational coupling between vibration modes of the carrier structure and vibration modes of the rotor, the mechanism having a flapping weight element, a first deformable member connecting the weight element to the mounting structure and restraining the mobility of the weight element, and a damper interposed between the weight element and the mounting structure for damping the movement of the weight element.
2 Assignments
0 Petitions
Accused Products
Abstract
A carrier structure for a rotor and a method of preventing the coupling of the vibration modes of a carrier structure of a flying machine with the vibration modes of a rotor are provided. The carrier structure has an airframe and a mounting structure suitable for being engaged with the rotor. A vibration-damper mechanism is fitted to the mounting structure and has a resonator that includes a weight element, a damper, and a first deformable member. The weight element is a flapping weight element and is carried by the mounting structure via the first deformable member. The first deformable member allows the weight element to move with respect to the mounting structure and restrains the mobility of the weight element. The damper is interposed between the weight element and the mounting structure for damping the movement of the weight element.
18 Citations
12 Claims
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1. A carrier structure for a rotor of a flying machine, the carrier structure comprising:
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a mounting structure supported by an airframe and suitable for being engaged with the rotor, the mounting structure including a gearbox having a top portion adjacent to the rotor and a bottom portion adjacent to the airframe and connected in a rigid manner to the rotor mast, the rotor having a rotor mast and a rotor head with elements between the bottom portion and the rotor head being rigid, the mounting structure having a plurality of suspension bars connecting the top portion of the gearbox to the airframe, and a plurality of fastener elements rigidly connecting the bottom portion of the gearbox to the airframe; and an anti-coupling vibration-damper mechanism connected to the gearbox and configured to act as a resonator to prevent aeroelastic instabilities due to vibrational coupling between vibration modes of the carrier structure and vibration modes of the rotor, the mechanism having a flapping weight element, a first deformable member connecting the weight element to the mounting structure and restraining the mobility of the weight element, and a damper interposed between the weight element and the mounting structure for damping the movement of the weight element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification