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US 4,999,994 AGranted
Turbo engine
AssigneeMTU Motoren-und Turbinen-Union Munchen GmbH
InventorsKlaus Rud, Alois Rohra
Life of this patent
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Abstract
A turbo engine with a gas turbine to drive propellers or propfan blades is disclosed which includes a speed reduction transmission interposed behind the gas turbine output drive shaft and the propellers or propfan blades. A cooling air impeller is provided to provide the supply of cooling air to an oil cooler for the speed reduction transmission. The impeller is arranged directly on the turbine output drive shaft.
Claims11
Turbo engine arrangement, comprising:
- gas turbine means, having an air intake duct, drivingly acting on a gas turbine output shaft;
- propeller means;
- speed reduction transmission means spaced axially from said gas turbine means drivingly interconnecting the gas turbine output shaft and the propeller means;
- transmission lubricating system means including an oil cooler having an annular configuration arranged axially between said speed reduction means and said gas turbine means and mounted radially inward of said air intake duct, said transmission lubricating system means being subjected to oil cooler cooling air flow;
- an oil cooler cooling air duct annularly arranged about said gas turbine output shaft including, a first section beginning in front of said air intake duct and extending radially inward having mounted therein said oil cooler;
- a second section extending in an axially aligned direction along the outer circumference of said gas turbine output shaft;
- a third section located downstream of said second section extending radially outward;
- a gas turbine engine outer casing chamber wherein the oil cooler cooling air duct discharges into said outer casing chamber through hollow struts of said air intake duct and wherein said oil cooler cooling air duct cross section steadily decreases from its inlet to its outlet;
- and
- an oil cooler impeller means arranged in said oil cooler cooling air duct downstream of said oil cooler.
7 more elements
Dependencies are inferred from the claim text.