Planetary gearbox system and method for operating a planetary gearbox system
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorHannes WUESTENBERG
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Abstract
A planetary gearbox system with a ring gear, a sun gear, a carrier and planetary gears as parts in a geared aircraft turbofan engine, with one static part of the parts being in rest under nominal operation and with a kinematic switch device for decoupling the static part to become a rotatable part or with a kinematic switch device for coupling the rotatable part to become a static part. The invention also relates to a method for operating a planetary gearbox system.
Claims23
A planetary gearbox system with a ring gear, a sun gear, a carrier and planetary gears as parts in a geared aircraft turbofan engine, with one static part of the parts being in rest under nominal operation and with a kinematic switch device for decoupling the static part to become a rotatable part or with a kinematic switch device for coupling the rotatable part to become a static part,
- wherein the kinematic switch device comprise two connecting means and means to automatically trigger a position change in least of one of the two connecting parts relative to the respective other connecting part and/or relative to an engine part from a first position into a second position in dependence of a torque effective on at least one of the two connecting parts and/or the engine part, in particular through the transmission via a shaft, in particular a non-nominal torque or a reversal in the direction of the torque, and
- wherein the means comprise a helical spline connection between the connecting parts, an explosive bolt device, an automatic clutch device and/or a hydraulic means.
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A method for operating a planetary gearbox system with a ring gear, a sun gear, a carrier and planetary gears as parts in a geared aircraft turbofan engine, with one static part of the parts being held in rest under nominal operation and the static part is decoupled with a kinematic switch device to become a rotatable part or the rotatable part is coupled with a kinematic switch device to become a static part,
- wherein the kinematic switch device comprise two connecting means and means to automatically trigger a position change in least of one of the two connecting parts relative to the respective other connecting part and/or relative to an engine part from a first position into a second position in dependence of a torque effective on at least one of the two connecting parts and/or the engine part, in particular through the transmission via a shaft, in particular a non-nominal torque or a reversal in the direction of the torque, and
- wherein the means comprise a helical spline connection between the connecting parts, an explosive bolt device, an automatic clutch device and/or a hydraulic means.
Dependencies are inferred from the claim text.