Gas turbine rotor assembly

A gas turbine engine has a front fan (11) connected to its turbine shaft (19) through a coupling (22) which allows the fan to move bodily radially relative to the shaft (19) when the fan becomes unbalanced when a blade comes off, due for example to striking an ingested bird, and experiences a radial...

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Bibliographische Detailangaben
Hauptverfasser:	ANTHONY WILLIAM THOMAS MOTTRAM, LEONARD STANLEY SNELL
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THANNON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS,TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTIONPRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A gas turbine engine has a front fan (11) connected to its turbine shaft (19) through a coupling (22) which allows the fan to move bodily radially relative to the shaft (19) when the fan becomes unbalanced when a blade comes off, due for example to striking an ingested bird, and experiences a radial shift of its centre-of-mass. The coupling allows the fan to invert relative to the shaft whilst still transmitting torque through the coupling.The fan is constrained to rotate about the same axis as the shaft during normal balanced running by a shear pin (23) that does not transmit torque, and a resilient restoring means (30) is provided for urging the unbalanced rotor to be moved to bring its new centre-of-mass back on to the axis of rotation of the shaft (19).