Emergency device for relighting a windmilling turbojet
AssigneeSnecma Moteurs
InventorsMichel Franchet, Guy Hebraud
Life of this patent
Estimating the term…
Abstract
An emergency device for relighting a windmilling turbojet, the jet comprising a fan driven by a low-pressure turbine via a first shaft and a compressor driven by a high-pressure turbine via a second shaft disposed coaxially around the first shaft, a differential interconnecting said first and second shafts while compensating for their different speeds of rotation in normal operation or the turbojet, and a braking system connected to the differential so as to enable it to be slowed down or blocked when the turbojet shuts down, thereby enabling the first shaft to entrain the second shaft so that it reaches a speed that favors relighting of the turbojet.
Claims9
An emergency device for relighting a windmilling turbojet, the jet comprising a fan driven by a low-pressure turbine via a first shaft and a compressor driven by a high-pressure turbine via a second shaft disposed coaxially around the first shaft, said device comprising a differential interconnecting said first and second shafts while compensating for their different speeds of rotation in normal operation of the turbojet, and a braking system connected to the differential so as to enable it to be slowed down or blocked when the turbojet shuts down, thereby enabling the first shaft to drive the second shaft so that it reaches a speed that favors relighting of the turbojet.
Dependencies are inferred from the claim text.