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US 11,073,041 B2Granted
Jet engine
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorsStephan Uhkoetter, Uwe Kracht, Thomas Philip Astley
Life of this patent
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Abstract
An aircraft engine having an oil circuit and a transmission that can be supplied with oil via the oil circuit. Oil fed to the transmission can be directed out of the transmission into an oil reservoir, from which oil can be introduced directly back into the transmission via a hydraulic line path. According to the invention, the oil fed to the oil reservoir can only be fed to the hydraulic line path below a defined filling level of the oil reservoir. When the defined filling level of the oil reservoir is reached, oil can also be introduced into a further hydraulic line path.
Claims19
An aircraft engine comprising:
- a transmission;
- an oil circuit supplyinq oil to the transmission and further comprising:
- an oil reservoir including:
- a defined filling level;
- an inlet through which oil is discharged into the oil reservoir from the transmission;
- and
- an air-oil volume flow which is predominately air;
- a first hydraulic line path;
- a second hydraulic line path including an opening;
- an oil separator located in the air-oil volume flow at the oil reservoir between the inlet of the oil reservoir and the opening of the second hydraulic line path;
- wherein oil fed to the transmission is directed out of the transmission into the oil reservoir, and wherein oil is directed out of the oil reservoir and introduced directly back into the transmission via the first hydraulic line path;
- wherein, when a level of oil in the oil reservoir is below the defined filling level, oil is only fed to the first hydraulic line path;
- and
- wherein, when the defined filling level of the oil reservoir is reached, oil is also introduced into the second hydraulic line path.
11 more elements
An aircraft engine comprising:
- a transmission;
- an oil circuit supplying oil to the transmission and further comprising:
- an oil reservoir including a defined filling level and an inlet through which oil is discharged into the oil reservoir from the transmission;
- a first hydraulic line path including:
- a pump, wherein the pump pumps oil out of the oil reservoir into the transmission;
- and
- a valve unit located in a region between the pump and the transmission;
- a second hydraulic line path;
- wherein the valve unit in the first hydraulic line path directs oil pumped out of the oil reservoir by the pump in one chosen from a direction of the transmission, back into the oil reservoir, and into the second hydraulic line path;
- wherein oil fed to the transmission is directed out of the transmission into the oil reservoir, and wherein oil is directed out of the oil reservoir and introduced directly back into the transmission via the first hydraulic line path;
- wherein when a level of oil in the oil reservoir is below the defined filling level, oil is only fed to the first hydraulic line path;
- and
- wherein when the defined filling level of the oil reservoir is reached, oil is also introduced into the second hydraulic line path.
10 more elements
An aircraft engine comprising:
- a transmission;
- an oil circuit supplying oil to the transmission and further comprising:
- an oil reservoir including:
- a defined filling level;
- an inlet through which oil is discharged into the oil reservoir from the transmission;
- and
- a first hydraulic line path;
- a second hydraulic line path including an opening;
- an oil separator located between the inlet of the oil reservoir and the opening of the second hydraulic line path, wherein the oil separator further comprises an extension of the inlet of the oil reservoir, wherein the extension discharges an air-oil volume flow from the transmission, wherein the extension extends from an upper boundary wall of the oil reservoir in a direction of a lower boundary wall and through a retention device into the oil reservoir, wherein the air-oil volume flow flowing into the oil reservoir via the inlet is introduced from the inlet into an oil volume stored in the oil reservoir when the extension of the inlet dips into the oil volume stored in the oil reservoir;
- wherein oil fed to the transmission is directed out of the transmission into the oil reservoir, and wherein oil is directed out of the oil reservoir and introduced directly back into the transmission via the first hydraulic line path;
- wherein when a level of oil in the oil reservoir is below the defined filling level, oil is only fed to the first hydraulic line path;
- and
- wherein when the defined filling level of the oil reservoir is reached, oil is also introduced into the second hydraulic line path.
10 more elements
Dependencies are inferred from the claim text.