Turbomachine Lubrication Unit and Method of Manufacture
AssigneeSafran Aero Boosters SA
InventorsMathieu Chenoux, Nicolas Fellin
Life of this patent
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Abstract
An aircraft bypass turbojet engine lubrication unit includes from three to five superposed pumps, a body housing the pumps and an internal passage in the body for communicating with each of the pumps. The material of the body exhibits a stack of layers in a direction of stacking, the pumps being housed in the said stack of layers. The passage exhibits an end in the direction of stacking of the layers and an internal profile, for example triangular, with two straight lines which form the said end and which are inclined with respect to the stacked layers. The lubrication unit may be manufactured by additive manufacturing in layers.
Claims20
A lubrication unit for a turbojet engine, the lubrication unit comprising:
- at least two pumps;
- and
- a body which exhibits a passage communicating with each of the pumps;
- wherein the material of the body exhibits a stack of layers in a direction of stacking, the pumps being housed in the said stack of layers;
- and wherein the passage exhibits an end in the direction of stacking of the layers, and a profile with a first straight line and a second straight line which form the said end and which are inclined with respect to the layers of the stack.
A lubrication unit, comprising:
- at least two pumps;
- and
- a body which exhibits a passage communicating with each of the pumps, the material of the body exhibiting a stack of layers in which the pumps are housed, the passage exhibiting a triangular profile with at least two or three sides arranged transversely with respect to the layers and inclined with respect to the direction of stacking of the layers.
A method for manufacturing a lubrication unit for an aircraft turbojet engine, the lubrication unit including at least two pumps and a casing with a body housing the at least two pumps and a passage communicating with each of the pumps, wherein the passage includes a profile with a first straight line and a second straight line forming one end of the profile, and wherein the material of the body exhibits a stack of layers in a direction of stacking, the pumps being housed in the said stack of layers, the method comprising:
- (a) designing the lubrication unit;
- and
- (b) using additive manufacturing to produce the body in stacked layers, so as progressively to create the first straight line and/or the second straight line transversely to the stacked layers.
Dependencies are inferred from the claim text.