Bearing with double pre-loading

Patent metadata

Field	Value
Publication number	US-9435373-B2
Application number	US-201414780721-A
Country	US
Kind code	B2
Filing date	Mar 18, 2014
Priority date	Mar 28, 2013
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

In a rotary machine bearing including an inner ring, an outer ring, and rolling elements between them, one of the inner and outer rings includes first and second half-rings suitable for being clamped in the axial direction between a thrust member and a first pre-loading system exerting a first predetermined axial force, and a second pre-loading system is provided that is inserted in the axial direction between the first and second half-rings and that exerts a second predetermined axial force less than the first predetermined axial force.

First claim

The invention claimed is:

1. A bearing for a rotary machine, the bearing comprising:
an inner ring,
an outer ring,
rolling elements between said inner and outer ring, a first pre-loading system exerting a first predetermined axial force, one of said inner and outer rings comprising first and second half-rings capable of being clamped in the axial direction between a thrust member and said first pre-loading system, and
a second pre-loading system inserted in the axial direction between said first and second half-rings and exerting a second predetermined axial force less than said first predetermined axial force.

2. A bearing according to claim 1 , wherein said first and second half-rings constitute said outer ring and are for mounting slidably in a stationary casing.

3. A bearing according to claim 2 , wherein said stationary casing comprises a portion forming the thrust member.

4. A bearing according to claim 1 , wherein said first and second half-rings constitute said inner ring and are designed to be slidably mounted around a stationary shaft.

5. A bearing according to claim 4 , wherein said stationary shaft comprises a portion forming the thrust member.

6. A bearing according to claim 1 , wherein the first and second pre-loading systems comprise respective resilient assemblies.

7. A bearing according to claim 6 , wherein each said resilient assembly comprises one or more spring washers.

8. A bearing according to claim 1 , wherein said rolling elements are oblique-contact bearing balls.

9. A bearing according to claim 1 , applied to an axial thrust bearing of a rotary machine mounted on radial fluid bearings.

Assignees

• Snecma

Inventors

• Boufflert Sebastien
• Bourdin Philippe
• Lemaitre Alban
• Tessier Fabien

Classifications

• F16C33/60

  divided {or split, e.g. comprising two juxtaposed rings} · CPC title

• F16C19/163

  with angular contact · CPC title

• F16C25/083 Primary

  with resilient means acting axially on a race ring to preload the bearing · CPC title

• F16C19/06

  with a single row or balls · CPC title