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US 7,882,765 B2Granted
Balancing assembly
AssigneeROLLS-ROYCE plc
InventorsJohn R. Webster, Ian C. D. Care
Life of this patent
Estimating the term…
Abstract
A balancing assembly for a rotor comprises a mass, a displacement arrangement for displacing the mass along a guide arrangement. The guide arrangement extends circumferentially and the displacement arrangement can move the mass circumferentially around the principal axis of the rotor during rotation of the rotor.
Claims19
A balancing assembly for a rotor, the assembly comprising:
- at least one mass;
- a magnetic displacement arrangement for displacing the mass relative to the rotor;
- and
- a guide extending only circumferentially around a principal axis of the rotor, the at least one mass being movably contained by the guide, wherein the magnetic displacement arrangement is constructed to deform and displace the at least one mass along the guide only circumferentially around a principal axis of the rotor during rotation of the rotor;
- and wherein the, or each, mass is formed of a magnetic material;
- and wherein the magnetic material comprises a magnetic shape memory material, or a magnetostrictive material.
3 more elements
A method of balancing a rotor comprising:
- providing at least one mass;
- providing a guide extending only circumferentially around a principal axis of the rotor, the at least one mass being movably contained by the guide so that the at least one mass can only move along the guide;
- and
- displacing the mass relative to the rotor using a magnetic displacement arrangement, said magnetic displacement arrangement constructed to deform and displace the mass circumferentially around the principal axis of the rotor during rotation of the rotor using the guide.
1 more element
Dependencies are inferred from the claim text.