Bearing arrangement

• US 8,021,050 B2
• Filed: 08/11/2009
• Issued: 09/20/2011
• Est. Priority Date: 10/22/2008
• Status: Expired due to Fees

• Current Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Original Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Inventors: Gibbons, John L.
• Primary Examiner(s): Charles; Marcus
• Application Number:
  US12/461,422
• Publication Number:
  US 20100098359A1
• Time in Patent Office: 770 Days
• Field of Search: 384/37, 384/43, 384/103, 384/104, 384/106, 384/108, 384/536, 384/569, 384/582, 298/980.66, 298/981.5
• US Class Current: 384/125
• CPC Class Codes: F16C 27/02 Sliding-contact bearings

Abstract

A bearing arrangement having first and second components located for relative operational movement by a respective bearing. The bearing has a bearing element including a pack of resiliently flexible bristles or leaves for transmitting force between the components thereby locally to provide a relative kinematic constraint on at least one degree of freedom of the components during the relative operational movement.

Claims

1. A bearing arrangement comprising:

a bearing;

a first component;

a second component; and

a support ring fixedly mounted to the first component or second component, the first and second components being configured for relative operational movement by the bearing, the bearing having a bearing element including

a pack of resiliently flexible bristles or leaves, each having tips, which extend from and are bonded to the support ring fixedly mounted to one of the components, and angled such that substantially only the tips of the bristles or leaves are in direct contact with the other of the components,

the bristles or leaves being configured for transmitting force between the first component and second component to provide a relative kinematic constraint on at least one degree of freedom of the components during said relative operational movement.

2. The bearing arrangement according to claim 1, wherein the bristles or leaves are pre-flexed against the components thereby to provide a positive kinematic constraint.

3. The bearing arrangement according to claim 1, wherein the bristles or leaves are formed from polymer, metal or ceramic.

4. The bearing arrangement according to claim 1, wherein the bearing element is a segmented bearing element comprising a plurality of said packs of resiliently flexible bristles or leaves.

5. The bearing arrangement according to claim 1, wherein the first component is a rotatable shaft, the second component is a support structure for the shaft and the bearing element is in the form of an annular collar formed from said one or more packs of resiliently flexible bristles or leaves for transmitting a shaft load to the support structure.

6. The bearing arrangement according to claim 5, wherein a plurality of said flexible bristles or leaves extend radially for transmitting a radial shaft bearing load to the support structure.

7. The bearing arrangement according to claim 5, wherein a plurality of said flexible bristles or leaves extend axially for transmitting an axial shaft bearing load to the support structure.

8. The bearing arrangement according to claim 5, wherein the bristles or leaves are inclined at an acute lay-angle to the radius of the shaft.

9. The bearing arrangement according to claim 5, wherein the bristles or leaves are inclined at an acute lay angle to the longitudinal axis of the shaft.

10. The bearing arrangement according to claim 5, wherein the bristles or leaves are fixedly mounted at one end to the shaft.

11. The bearing arrangement according to claim 1, further comprising a plurality of bearings between the first component and second component.

12. A method of operating the bearing arrangement according to claim 5, the method comprising rotating the shaft at low-speed.