Rolls-Royce Deutschland Ltd & Co. Kg

Wolfram Kurz-Hardjosoekatmo

Stephan Uhkötter

Uwe Kracht

Rens Douma

Ivo Martin

David Stephen Williams

Maximilian Prölss

Stefan Menczykalski

Tobias Eberhardt

Carsten Wolf

Alexander Schütt

An oil system of a gas turbine engine, includes a first oil circuit and a second oil circuit. Via the oil circuits, oil is supplied to a hydraulic load of a transmission of the engine. Downstream of the load, in the region of a return of the transmission, oil is introduced into the oil circuits from the transmission. Upstream of the load, in the region of inlets, oil can be introduced into the transmission from the oil circuits. The second oil circuit includes an oil accumulator between the return and the inlet of the second oil circuit. The oil accumulator is configured such that, according to a feed pressure of the oil upstream of the inlet, oil is stored in the oil accumulator or oil stored in the oil accumulator is fed toward the inlet.

Oil system of a gas turbine engine, comprising a first oil circuit and at least one second oil circuit, and gas turbine engine

A friction of a planetary gearbox, having first and second rotatably connected components. Oil adjacent an oil feed pocket of the first component is directed into a bearing clearance. The oil is directed into the pocket by a line that opens into the pocket. An oil supply unit supplies oil to the bearing clearance at a defined pressure. A ratio between the pulse, via which the oil is directed into the bearing clearance and which corresponds to the product of the square of the inflow rate of the oil into the clearance and the oil density, and the pulse of the oil which adheres to the internal side of the second component ≥5*10. The pulse of the oil adhering to the second component is equal to the product of the square of the velocity of the oil adhering to the second component and the oil density.

Friction bearing and method for lubricating and cooling a friction bearing

A friction bearing of a planetary gearbox, has first and second rotatably connected components. Oil adjacent an oil feed pocket of the first component is directed into the bearing clearance between the components. The oil is directed into the pocket by a first line that opens into the pocket. The profile of the line conjointly with the radial direction of the bearing clearance encloses an angle to direct the oil from the line into the oil feed pocket, the angle being approximately 5°-60° to the radial direction of the bearing clearance and in the main rotation direction of the second component in relation to the first component, or at an angle of approximately 5°-20° to the radial direction of the bearing clearance and in the circumferential direction of the bearing clearance and counter to the main rotation direction of the second component to the first component.

Friction bearing, and method for lubricating and cooling a friction bearing

A plain bearing of a planetary gearbox has first and second rotationally connected components. Oil adjacent an oil feed pocket of the first component is directed into the bearing clearance between the components by a first line that opens into the pocket. The line includes a first portion and a downstream second portion. The flow cross section of the first portion is smaller than the flow cross section of the second portion. The flow cross section for the oil, in the feed direction, in the circumferential direction of the clearance and in the main rotation direction of the second component relative to the first component increases more than counter to the main rotation direction of the second component, or in the circumferential direction of the clearance and counter to the main rotation direction of the second component increases more than in the main rotation direction of the second component.

Plain bearing, and method for lubricating and cooling a plain bearing

A friction bearing of a planetary gearbox has a first rotationally fixed component and a second component rotatably connected thereto. Oil in the region of an oil feed pocket of the first component is directed into the bearing clearance between the components. The oil is directed into the oil feed pocket via at least one first line that opens into the oil feed pocket. Oil is also directed via at least one second line into the oil feed pocket, the port region of said second line into the oil feed pocket in the circumferential direction of the bearing clearance and in the main rotation direction of the second component in relation to the first component and/or in the axial direction of the friction bearing being spaced apart from the port region of the first line into the oil feed pocket.

An oil system of a gas turbine engine, has first and second oil circuits. The oil circuits include. Respectively, first and second oil reservoirs, first and second oil consumers of the engine, and first and second heat exchangers for temperature control. The first oil consumer is impinged with oil from the first oil reservoir. The second oil consumer is impinged with oil from the second oil reservoir. The first oil consumer is connected to the first oil reservoir, and the second oil consumer is connected to the second oil reservoir. The operating temperature of oil in the first oil circuit is lower than in the second oil circuit. The first oil reservoir is connected to the second oil reservoir. Oil from each oil reservoir can be guided into the other oil reservoir via the connection.

Oil system of a gas turbine engine

A planetary gear mechanism has a rotatable planet carrier, a device for conducting oil, and a housing-fixed oil collecting duct. The oil collecting duct surrounds an area of the planet carrier in the circumferential direction. Oil centrifuged off by the planet carrier is collected in the oil collecting duct. In the installation position of the oil collecting duct, the oil is conducted by a gravitational force in the direction of a lower collection area formed with an outlet through which oil can be discharged. A further outlet, through which oil can be conducted, is provided in front of the collection area with respect to the rotational direction of the planet carrier between an upper area of the oil collecting duct, as it appears in the installation position of the oil collecting duct, and the outlet. Also, an aircraft gas turbine with the planetary gear mechanism.

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Kleinmachnow, Germany

Wolfram Kurz-Hardjosoekatmo