A drive disconnect device for releasably connecting an electrical generator to a drive shaft, the drive disconnect device comprising an output shaft and at least one drive transfer element movable from a first position where it drivingly connects the drive shaft and the output shaft to a second posi
A drive disconnect device for releasably connecting an electrical generator to a drive shaft, the drive disconnect device comprising an output shaft and at least one drive transfer element movable from a first position where it drivingly connects the drive shaft and the output shaft to a second position where the driving connection is removed, wherein operation of the disconnect device causes the electrical generator to become electrically isolated or excitation for the generator to be inhibited.
대표청구항▼
1. A drive disconnect device for releasably connecting an electrical generator to an input shaft, the drive disconnect device comprising an output shaft and at least one drive transfer element movable from a first position where it drivingly connects the input shaft and the output shaft to a second
1. A drive disconnect device for releasably connecting an electrical generator to an input shaft, the drive disconnect device comprising an output shaft and at least one drive transfer element movable from a first position where it drivingly connects the input shaft and the output shaft to a second position where a driving connection between the input shaft and the output shaft is removed, wherein operation of the disconnect device causes the electrical generator to become electrically isolated or excitation for the generator to be inhibited, said drive disconnect device further comprising a release element and a lock, and in which one of the release element and the lock carries electrical contacts such that the electrical generator is connectable to an external circuit when the lock holds the release element at an armed position, and the electrical generator is isolated from the external circuit or excitation is inhibited when the lock is operated to allow the release element to move from the armed position. 2. A drive disconnect device as claimed in claim 1, in which the release element is an annular sleeve having a detent receiving region, the detent receiving region having an inclined surface such that a bias force urging the release element from the armed position generates a component of force via the interaction between the detent and the detent receiving region that urges the detent out of engagement with the release element. 3. A drive disconnect device as claimed in claim 2, in which the detent is held in engagement with the release element by a release pin. 4. A drive disconnect device as claimed in claim 3, in which the motion of the release pin is inhibited by a solenoid until it is desired to operate the drive disconnect device, when the solenoid is operated so as to allow the release pin to move. 5. A drive disconnect device as claimed in claim 3, in which the release pin carries at least one electrical connect which co-operates with fixed contacts to conduct electricity when the release pin is at a first release pin position and to be out of connection with the fixed contacts when the release pin moves to a drive disconnect position. 6. A drive disconnect device as claimed in claim 5, in which the release pin comprises a sleeve disposed around a rod, the sleeve having a recess which engages with the solenoid, and a compression spring acts between the sleeve and a head portion of the rod to urge the sleeve to move to a position where excitation for the generator is inhibited. 7. A drive disconnect device as claimed in claim 1 in combination with a generator, in which electrical power is supplied to an exciter winding of the generator when the drive disconnect device is operable to transfer drive, and the supply of electrical power to the exciter is inhibited when the drive disconnect device is operated to disconnect the output shaft from the drive shaft. 8. A drive disconnect device as claimed in claim 1, in which the release element carries an elongate toothed region which acts as a rack which co-operates with a pinion gear to allow motion of the pinion gear to move the release element between the release and armed positions. 9. A drive disconnect device as claimed in claim 1, in which upon release of the lock the release element applies force to the drive transfer element to move it against the urging of a bias to the second position, and where the interface between the drive transfer element and the release element comprises a plurality of bearings extending from a carrier. 10. A drive disconnect device for releasably connecting an electrical generator to an input shaft, the drive disconnect device comprising an output shaft and at least one drive transfer element movable from a first position where it drivingly connects the input shaft and the output shaft to a second position where a driving connection between the input shaft and the output shaft is removed, wherein initiation of operation of the disconnect device causes the electrical generator to become electrically isolated or excitation for the generator to be inhibited, such that a force acting through the drive transfer element is reduced. 11. A drive disconnect device as claimed in claim 10, further comprising a release element and a lock, and in which one of the release element and the lock carries electrical contacts such that the electrical generator is connectable to an external circuit when the lock holds the release element at an armed position, and the electrical generator is isolated from the external circuit or excitation is inhibited when the lock is operated to allow the release element to move from the armed position. 12. A drive disconnect device as claimed in claim 11, in which the release element is an annular sleeve having a detent receiving region, the detent receiving region having an inclined surface such that a bias force urging the release element from the armed position generates a component of force via the interaction between the detent and the detent receiving region that urges the detent out of engagement with the release element. 13. A drive disconnect device as claimed in claim 12, in which the detent is held in engagement with the release element by a release pin. 14. A drive disconnect device as claimed in claim 13, in which the motion of the release pin is inhibited by a solenoid until it is desired to operate the drive disconnect device, when the solenoid is operated so as to allow the release pin to move. 15. A drive disconnect device as claimed in claim 13, in which the release pin carries at least one electrical connect which co-operates with fixed contacts to conduct electricity when the release pin is at a first release pin position and to be out of connection with the fixed contacts when the release pin moves to a drive disconnect position. 16. A drive disconnect device as claimed in claim 15, in which the release pin comprises a sleeve disposed around a rod, the sleeve having a recess which engages with the solenoid, and a compression spring acts between the sleeve and a head portion of the rod to urge the sleeve to move to a position where excitation for the generator is inhibited. 17. A drive disconnect device as claimed in claim 11, in which the release element carries an elongate toothed region which acts as a rack which co-operates with a pinion gear to allow motion of the pinion gear to move the release element between the release and armed positions. 18. A drive disconnect device as claimed in claim 11, in which upon release of the lock the release element applies force to the drive transfer element to move it against the urging of a bias to the second position, and where the interface between the drive transfer element and the release element comprises a plurality of bearings extending from a carrier. 19. A drive disconnect device as claimed in claim 10, in combination with a generator, in which electrical power is supplied to an exciter winding of the generator when the drive disconnect device is operable to transfer drive, and the supply of electrical power to the exciter is inhibited when the drive disconnect device is operated to disconnect the output shaft from the drive shaft.
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이 특허에 인용된 특허 (3)
Howard,Darren Christopher; Hayward,Dennis Richard; Howard,Rodney Stuart, Disconnect mechanism and devices including such a disconnect mechanism.
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