Patent ID: 9506476
Filing Date: 2016-11-29
CPC Classification: F01D,F04D,F16N

Claim Text:
1. A turboprop engine, comprising: a turbomachine, a propeller gearbox, a propeller driven by the turbomachine via the propeller gearbox, a propeller adjusting device associated with the propeller for adjusting the propeller, a high-pressure pump associated with the propeller adjusting device for driving the propeller adjusting device, a first oil circuit; an oil conveying pump integrated into the first oil circuit for supplying the turbomachine, a second oil circuit, a second oil conveying pump integrated into the second oil circuit for supplying the propeller gearbox and the high-pressure pump, an oil supply line; wherein the first and the second oil circuits are connected in a flow direction downstream of the first and the second oil conveying pumps via the oil supply line for passing a limited oil volumetric flow from the first oil circuit into the second oil circuit, if, in an event of a pressure reduction in the second oil circuit, a magnitude of a pressure difference between the first and the second oil circuits rises above a certain level, wherein the first and the second oil circuits are connected to a common oil tank.