Bearing device for load reduction

Patent metadata

Field	Value
Publication number	US-11215076-B2
Application number	US-201916451997-A
Country	US
Kind code	B2
Filing date	Jun 25, 2019
Priority date	Jul 2, 2018
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A bearing assembly for a gas turbine engine comprises a bearing; a bearing bracket, which holds the bearing and is secured by a predetermined breaking device on a connecting element, which can be connected or is connected to a support structure of the gas turbine engine; and a clutch for transmitting a torque from a first clutch element connected in a fixed manner to the rotor of the bearing to a second clutch element supported on the bearing bracket, wherein the clutch elements are spaced apart when the predetermined breaking device is intact and can be brought into contact with one another by destruction of the predetermined breaking device. A gas turbine engine and a method are furthermore provided.

First claim

The invention claimed is:

1. A bearing assembly for a gas turbine engine, comprising:
a bearing having a stator and a rotor rotatable relative thereto;
a bearing bracket, which holds the bearing;
a connecting element including an annular, projecting extension configured to be connected to a support structure of the gas turbine engine,
a predetermined breaking device including at least one shear pin and being secured on the connecting element; and
a clutch for transmitting a torque from a first clutch element connected in a fixed manner to the rotor of the bearing to a second clutch element supported on the bearing bracket, wherein the first and second clutch elements are spaced apart when the predetermined breaking device is intact and are brought into contact with one another by destruction of the predetermined breaking device via shearing of the at least one shear pin.

2. The bearing assembly according to claim 1 , and further comprising a wearing element, which is configured to engage at least one chosen from the first and second clutch elements, is arranged between the first and second clutch elements and is made from a material and having a thickness which will wear away when in engagement with the at least one chosen from the first and second clutch elements.

3. The bearing assembly according to claim 1 , further comprising a fixing device for fixing the bearing bracket on the connecting element, the fixing device being drivable by the clutch.

4. The bearing assembly according to claim 3 , wherein the fixing device comprises an outer component and an inner component arranged within the outer component.

5. The bearing assembly according to claim 4 , wherein the inner component is rotatable relative to the outer component via the clutch when the first and second clutch elements are in contact with one another.

6. The bearing assembly according to claim 4 , wherein the inner component includes a projection, and the outer component includes at least one socket for receiving the projection.

7. The bearing assembly according to claim 6 , wherein the projection is configured to push against a stop of the outer component by rotation of the inner component relative to the outer component to fix the bearing bracket on the connecting element.

8. The bearing assembly according to claim 7 , wherein the projection and the stop and/or a region of the outer component which is adjacent to the stop, are configured to fix the inner component frictionally and/or positively on the outer component.

9. The bearing assembly according to claim 7 , wherein the outer component includes a coating and/or positive engagement elements in a region of the stop.

10. The bearing assembly according to claim 6 , wherein the at least one socket includes two or more sockets having different lengths from one another when viewed in a circumferential direction.

11. The bearing assembly according to claim 6 , wherein the at least one socket includes a plurality of sockets of a same length arranged adjacent to one another.

12. The bearing assembly according to claim 4 , wherein the second clutch element is connected in a fixed manner to the inner component or is formed thereon, and, after the destruction of the predetermined breaking device, the inner component is supported rotatably on the bearing bracket.

13. The bearing assembly according to claim 4 , and further comprising a lubricant feed configured to introduce lubricant between the inner component and the bearing bracket.

14. A gas turbine engine for an aircraft, comprising:
a fan,
a shaft, by which the fan is driven, and
the bearing assembly according to claim 1 , wherein the bearing of the bearing assembly supports the shaft.

15. A method for producing a bearing assembly for a gas turbine engine, comprising the following steps:
providing a bearing assembly for a gas turbine engine, comprising:
a bearing having a stator and a rotor rotatable relative thereto;
a bearing bracket, which holds the bearing;
a connecting element including an annular, projecting extension configured to be connected to a support structure of the gas turbine engine,
a predetermined breaking device including at least one shear pin and being secured on the connecting element; and
a clutch for transmitting a torque from a first clutch element connected in a fixed manner to the rotor of the bearing to a second clutch element supported on the bearing bracket;

providing that the first and second clutch elements are spaced apart when the predetermined breaking device is intact and are brought into contact with one another by destruction of the predetermined breaking device via shearing of the at least one shear pin.

16. The method according to claim 15 , further comprising:
specifying a period of time from destruction of the predetermined breaking device;
specifying forces acting on the clutch after the destruction of the predetermined breaking device; and
providing a wearing element, which is configured to engage at least one chosen from the first and second clutch elements and which is made from a material and having a thickness which will wear away when in engagement with the at least one chosen from the first and second clutch elements after a period of time corresponding to the specified period of time when the forces which act on the clutch after the destruction of the predetermined breaking device take effect.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Boehme Martin
• Schatke Timo

Classifications

• F05D2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• F05B2260/3011

  of the frangible or shear type · CPC title

• F02C7/06 Primary

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

• F01D25/06

  for preventing blade vibration (means on blade-carrying members or blades F01D5/00) · CPC title

• F05D2240/50

  Bearings · CPC title