Gear pump parallel load path
AssigneePratt & Whitney Canada Corp.
InventorHugues Pellerin
Life of this patent
Estimating the term…
Abstract
A gear pump arrangement of an aircraft gas turbine engine is provided. The gear pump arrangement includes an accessory, a quill shaft, two gear pumps in series, axial retention members at the accessory and one of the two gear pumps to axially retain the quill shaft and torque transmitting members (TTMs). The TTMs include a first TTM between the one of the two gear pumps and the quill shaft and a second TTM between the quill shaft and the accessory whereby the quill shaft directly links the one of the two gear pumps to the accessory.
Claims20
A gear pump arrangement of an aircraft gas turbine engine, the gear pump arrangement comprising:
- an accessory;
- a quill shaft;
- two gear pumps in series;
- axial retention members at the accessory and one of the two gear pumps to axially retain the quill shaft;
- and
- torque transmitting members (TTMs) comprising a TTM between the one of the two gear pumps and the quill shaft and a TTM between the quill shaft and the accessory whereby the quill shaft directly links the one of the two gear pumps to the accessory.
A gear pump arrangement of an aircraft gas turbine engine, the gear pump arrangement comprising:
- an accessory;
- a quill shaft;
- at least first, second and third gear pumps in series;
- axial retention members at the accessory and the third gear pump to axially retain the quill shaft;
- a first torque transmitting member (TTM) between the third gear pump and the quill shaft and a second TTM between the quill shaft and the accessory whereby the quill shaft directly links the third gear pump to the accessory;
- and
- third and fourth TTMs at the second gear pump whereby the second gear pump directly links to the first and third gear pumps.
A gear pump arrangement, comprising:
- a quill shaft;
- first, second and third gear pumps;
- axial retention members at the first and third gear pumps to axially retain the quill shaft;
- a first torque transmitting member (TTM) between the third gear pump and the quill shaft and a second TTM between the quill shaft and the first gear pump whereby the quill shaft directly links the first and third gear pumps;
- and
- third and fourth TTMs between the third gear pump and the second gear pump whereby the third gear pump directly links to the second gear pump.
Dependencies are inferred from the claim text.