Solid Lubricant

• US 20120201487A1
• Filed: 02/08/2011
• Published: 08/09/2012
• Est. Priority Date: 02/08/2011
• Status: Active Grant

• Current Assignee: ABet SKF
• Original Assignee: ABet SKF
• Inventors: Kverel, Eugene
• Granted Patent: US 10,155,914 B2
• Time in Patent Office: Days
• US Class Current: 384/463
• CPC Class Codes: C10M 103/00 Lubricating compositions characterised by the base-material being an inorganic material containing more than 10% water C10M173/00
• CPC Class Codes: C10M 103/02 Carbon; Graphite
• CPC Class Codes: C10M 2201/041 Carbon; Graphite; Carbon black
• CPC Class Codes: C10M 2201/0413 used as base material
• CPC Class Codes: C10M 2201/066 Molybdenum sulfide
• CPC Class Codes: C10M 2213/0606 used as base material
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/08 Resistance to extreme temperature
• CPC Class Codes: C10N 2030/64 Environmental friendly compositions
• CPC Class Codes: C10N 2040/02 Bearings
• CPC Class Codes: C10N 2050/08 Solids
• CPC Class Codes: F16C 2202/52 Graphite
• CPC Class Codes: F16C 2240/64 in the nanometer range
• CPC Class Codes: F16C 33/6696 with solids as lubricant, e.g. dry coatings, powder

Abstract

A solid lubricant is for a bearing and includes at least thirty percent by weight of graphite, a binding material, and inorganic lubricating nanoparticles. Also, a bearing filled with the solid lubricant is provided.

Claims

1. A solid lubricant for a bearing, the lubricant comprising:

at least 30 wt % of graphite;

binding material; and

inorganic lubricating nanoparticles.

2. The solid lubricant according to claim 1, wherein the solid lubricant further comprises at least 1 wt % of molybdenum disulfide,

3. The solid lubricant according to claim 1, wherein the inorganic lubricating nanoparticles have an average size of 80 to 160 nanometers.

4. The solid lubricant according to claim 1, wherein the inorganic lubricating nanoparticles are a metal dichalcogenide.

5. The solid lubricant according to claim 1, wherein the solid lubricant further comprises a high density liquid having a density ≧

1.8 g/cm3.

6. The solid lubricant according to claim 5, wherein the high density liquid is an oil.

7. The solid lubricant according to claim 1, wherein the solid lubricant has a porous structure, and wherein the inorganic lubricating nanoparticles are embedded in the porous structure.

8. The solid lubricant according to claim 5, wherein an anti-rust additive is mixed in the high density liquid.

9. A bearing comprising:

an outer ring;

an inner ring disposed within the outer ring so as to define a space; and

a solid lubricant disposed within the space and including at least 30 wt % of graphite, binding material, and inorganic lubricating nanoparticles.

10. The bearing according to claim 9, wherein:

the outer ring presents an inner raceway on a radially inner peripheral surface of the outer ring;

the inner ring presents an outer raceway on a radially outer peripheral surface of the inner ring; and

wherein a plurality of rolling elements are positioned between the inner and outer raceway.

11. The bearing according to claim 10, further comprising at least one separating element for separating at least two adjacent rolling elements.

12. The bearing according to claim 11, wherein the solid lubricant is at least partly attached to the separating element.

13. The bearing according to claim 11, wherein the solid lubricant is the separating element.