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US 10,873,252 B2Granted
Turning device for a turbomachine
AssigneeNuovo Pignone Tecnologie Srl
InventorsSergio Defranciscis, Lorenzo Naldi, Duccio Fioravanti, Massimiliano Ortiz Neri
Life of this patent
Estimating the term…
Abstract
A turning device for a turbomachine comprises a plurality of electromagnets connectable to an electric power source; a rotor magnetically coupled with the electromagnets, connectable to a main shaft of the turbomachine and having a rotation axis, the electromagnets are arranged facing the rotor in order to induce eddy currents on a surface of the rotor and apply a torque to the rotor, thus rotating the main shaft.
Claims16
A turning device for a turbomachine, the turning device comprising:
- a rotor connectable to a shaft of the turbomachine and having a rotation axis and two surfaces forming opposite sides of the rotor;
- and
- at least two sets of electromagnets connectable to an electric power source, at least one of the at least two sets of electromagnets acts on one of the two surfaces of the rotor and at least another of the at least two sets of electromagnets acts on the other of the two surfaces of the rotor, and at least one of the at least two sets of electromagnets comprises at least one first electromagnet arranged to act on a peripheral zone of one of the two surfaces of the rotor relative to the rotation axis at least one second electromagnet arranged to act on a central zone of the one of the two surfaces of the rotor relative to the rotation axis and at least one third electromagnet arranged between the at least one first electromagnet and the at least one second electromagnet,
- wherein the rotor is configured to be magnetically coupled to the at least two sets of electromagnets and the at least two sets of electromagnets are arranged in proximity of the rotor in order to induce eddy currents on the two surfaces of the rotor and apply a torque to the rotor to rotate the shaft of the turbomachine.
1 more element
A turbomachine comprising:
- a shaft;
- and
- a turning device comprising:
- a rotor connectable to the shaft and having a rotation axis and two surfaces forming opposite sides of the rotor;
- and
- at least two sets of electromagnets connectable to an electric power source, at least one of the at least two sets of electromagnets acts on one of the two surfaces of the rotor and at least another of the at least two sets of electromagnets acts on the other of the two surfaces of the rotor, and at least one of the at least two sets of electromagnets comprises at least one first electromagnet arranged to act on a peripheral zone of one of the two surfaces of the rotor relative to the rotation axis, at least one second electromagnet arranged to act on a central zone of the one of the two surfaces of the rotor relative to the rotation axis and at least one third electromagnet arranged between the at least one first electromagnet and the at least one second electromagnet,
- wherein the rotor is configured to be magnetically coupled to the at least two sets of electromagnets and the at least two sets of electromagnets are arranged in proximity of the rotor in order to induce eddy currents on the two surfaces of the rotor and apply a torque to the rotor to rotate the shaft.
4 more elements
Dependencies are inferred from the claim text.