Planetary gear device with an oil supply appliance, gas turbine engine with a planetary gear device and method for manufacturing a vane pump

Patent metadata

Field	Value
Publication number	US-10823174-B2
Application number	US-201916365134-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Mar 28, 2018
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

A planetary gearbox device, a gas turbine engine with a planetary gearbox device, and a method for producing a scoop pump. The planetary gearbox device includes an oil supply appliance, wherein the oil supply appliance has a ring-shaped scoop pump that is connected to the rotatable shaft of the planetary gearbox device and an oil supply fixedly arranged at the housing and by which oil is supplied to the scoop pump. The scoop pump has multiple blades that extend in a circumferentially arranged manner and extend from a radially outer area in the direction of a radially inner area. The blades delimit grooves extending in the circumferential direction in the radial direction and respectively form a groove base of the grooves. The oil is conducted from the oil supply to outlets via which oil is conducted out of the scoop pump in the radial direction outwards.

First claim

The invention claimed is:

1. A planetary gearbox device comprising:
a rotatable shaft including an oil passage arranged in the rotatable shaft;
a housing;
an oil supply appliance via which an area of the planetary gearbox device is impinged with oil, wherein the oil supply appliance further comprises:
a ring-shaped scoop pump that is connected to the rotatable shaft, wherein the ring-shaped scoop pump includes:
a radially outer area with respect to an axis of rotation of the rotatable shaft;
a radially inner area;
a plurality of blades that extend in a circumferential direction with respect to the axis of rotation and are circumferentially arranged, and wherein the plurality of blades extend from the radially outer area in a direction of the radially inner area; and
a plurality of grooves delimited by and located between the plurality of blades, wherein the plurality of grooves extend in the circumferential direction and in a radial direction and respectively form a plurality of groove bases of the plurality of grooves, and wherein the plurality of grooves are open radially to an inside and wherein the plurality of grooves are open radially to an outside;

an oil supply fixedly arranged at the housing, via which oil is supplied to the ring-shaped scoop pump, wherein the old supply includes:
a nozzle with a defined impulse flow arranged at a radial distance from the ring-shaped scoop pump;
wherein oil is sprayed with the defined impulse flow from the nozzle in a direction of the ring-shaped scoop pump to conduct oil to the ring-shaped scoop pump in a contact-free manner;
a deflection area;
a channel area including an outlet;
an oil passage, wherein oil is guided from the oil supply through the plurality of grooves to the deflection area of the ring-shaped scoop pump;
wherein oil is deflected via the deflection area in a direction of the channel area and conducted in the radial direction outwards from the ring-shaped scoop pump via the outlet of the channel area; and
wherein the outlet is in operative connection with the oil passage that is arranged in the rotatable shaft and via which the area of the planetary gearbox device is impinged with oil.

2. The planetary gearbox device according to claim 1 , wherein the channel area extends substantially in an axial direction with respect to the axis of rotation of the rotatable shaft.

3. The planetary gearbox device according to claim 1 , wherein the oil supply includes a plurality of nozzles.

4. The planetary gearbox device according to claim 3 , wherein at least one nozzle of the plurality of nozzles supplies oil in the radial direction to the ring-shaped scoop pump.

5. The planetary gearbox device according to claim 4 , wherein the oil supply appliance is located at an angle of between 0° and 90° with the radial direction of the ring-shaped scoop pump, starting from the nozzle to the ring-shaped scoop pump.

6. The planetary gearbox device according to claim 1 , wherein the oil supply appliance is an oil supply ring.

7. The planetary gearbox device according to claim 1 , wherein the ring-shaped scoop pump is in one chosen from one piece, two pieces, and greater than two pieces.

8. The planetary gearbox device according to claim 1 , wherein the rotatable shaft is one chosen from a planetary carrier, a ring gear, a planetary gear and a sun gear of the planetary gearbox device.

9. A gas turbine engine for an aircraft, comprising:
the planetary gearbox device according to claim 1 ;
an engine core comprising a turbine, a compressor and a core shaft, wherein the core shaft connects the turbine to the compressor;
a fan that is positioned upstream of the engine core, wherein the fan comprises multiple fan blades; and
wherein the planetary gearbox device receives an input from the core shaft and the planetary gearbox device provides an output drive for the fan for driving the fan with a lower rotational speed than the core shaft.

10. The gas turbine engine according to claim 9 , wherein the turbine is a first turbine, the compressor is a first compressor, and the core shaft is a first core shaft;
wherein the engine core further comprises a second turbine, a second compressor, and a second core shaft, wherein the core shaft connects the second turbine to the second compressor; and
wherein the second turbine, the second compressor and the second core shaft are arranged in such a manner that they rotate with a higher rotational speed than the first core shaft.

11. The planetary gearbox device according to claim 1 , wherein the ring-shaped scoop pump is a 3D printed ring-shaped scoop pump.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Violet Jakob

Classifications

• F02C7/06

  Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M) · CPC title

• F16C33/1045

  Details of supply of the liquid to the bearing · CPC title

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title

• F02C3/113

  with variable power transmission between rotors · CPC title

• F16H57/0423

  Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes · CPC title