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US 4,960,006 AGranted
Turning gear engagement device
AssigneeGeneral Electric Company
InventorJames H. Moore
Life of this patent
Estimating the term…
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AssigneeGeneral Electric Company
InventorJames H. Moore
Estimating the term…
A turning gear apparatus mounted adjacent the bull gear of a large turbomachine rotor has a carriage pivotably mounted to the frame, a first pinion rotatably mounted on the carriage, and a second pinion continuously engaging the first pinion and rotatably mounted to the frame coaxial with the carriage pivoting axis. The improvement comprises locating the carriage on the side of the bull gear where it rotates in an upward direction, with the axis of the second pinion located such that when the carriage is pivoted and the first pinion engages the bull gear, the axis of rotation of the first pinion is located on a selected angle below the horizintal substantially equal to the pressure angle of the bull gear tooth, resulting in substantially vertical reaction forces. Also in the preferred embodiment, the pivotable carriage is rendered bi-stable by disposing the first pinion above the second pinion and providing stops such that the pivotable turning gear carriage has a center of gravity which falls on either side of a vertical line through the pivot point and above the pivot point, when the carriage is positioned on the respective stops in the engaged or disengaged position.
An improved turning gear apparatus for rolling a turbomachine rotor by selectively engaging a bull gear on the turbomachine rotor, said turbomachine rotor and said bull gear having a horizontal rotor axis of rotation, said turning gear apparatus including a stationary frame mounted adjacent the bull gear,
In a turning gear apparatus for rolling a turbomachine rotor mounted for rotation about a first horizontal axis by selectively engaging a bull gear mounted on the rotor with a driven pinion mounted on a pivotally movable carriage for rotation about a second horizontal axis, the improvement comprising:
Turning gear apparatus for rolling a turbomachine rotor mounted for rotation about a fist axis comprising:
Dependencies are inferred from the claim text.