Solid lubricant

• US 10,155,914 B2
• Filed: 02/08/2011
• Issued: 12/18/2018
• Est. Priority Date: 02/08/2011
• Status: Active Grant

• Current Assignee: Eugene Kverel
• Original Assignee: Eugene Kverel
• Inventors: Kverel, Eugene
• Primary Examiner(s): Oladapo, Taiwo
• Application Number:
  US13/023,337
• Publication Number:
  US 20120201487A1
• Time in Patent Office: 2,870 Days
• Field of Search: 508100, 508110, 508109
• 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 bearing comprising:

an outer ring;

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

a plurality of roller bearings within the space; and

a solid lubricant disposed within the space to cover a face of the plurality of roller bearings at axial ends of the bearing and provide a seal for the bearing that seals the axial ends of the bearing, the solid lubricant including at least 30 wt. % of graphite, wherein the solid lubricant further includes a binding material and inorganic lubricating nanoparticles having an average size greater than 150 nanometers, the inorganic lubricating nanoparticles composed of metal chalcogenides including substantially spherical nested fullerene like nanospheres.

2. The bearing according to claim 1, 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 the plurality of roller bearings are positioned between the inner and outer raceway.

3. The bearing according to claim 2, further comprising at least one separating element for separating at least two adjacent roller bearings.

4. The bearing according to claim 3, wherein the solid lubricant is at least partly attached to the separating element.

5. The bearing according to claim 3, wherein the solid lubricant is the separating element.

6. The bearing according to claim 1, wherein the inorganic lubricating nanoparticles comprise a metal dichalcogenide.

7. The bearing according to claim 1, wherein the metal dichalcogenide has a chemical formula MX₂, wherein M is selected from the group consisting of molybdenum and wolfram, and X is selected from the group consisting of sulphur and selenium.

8. The bearing according to claim 1, wherein the inorganic lubricating nanoparticles have an average size greater than 130 nanometers.

12. The bearing according to claim 1, wherein the inorganic lubricating nanoparticles comprise a metal dichalcogenide.

13. The bearing according to claim 1, wherein the metal dichalcogenide has a chemical formula MX₂, wherein M is selected from the group consisting of molybdenum and wolfram, and X is selected from the group consisting of sulphur and selenium.

14. The bearing according to claim 1, wherein the rolling elements comprises a deep-groove ball bearing, a self-aligned ball bearing, an angular contact ball bearing, a thrust ball bearing, spherical roller bearing, cylindrical roller bearing, a tapered roller bearing, a toroidal roller bearing, a thrush roller bearing, or a combination thereof.

9. A bearing comprising:

an outer ring having a first raceway;

an inner ring having a second raceway;

a rolling element assembly positioned between the first and second raceway, the rolling element assembly including a plurality of roller bearings that are in direct contact with the first raceway and the second raceway, and a separating element between at least one pair of adjacent rolling elements; and

a solid lubricant disposed to entirely fill a space between the first raceway, the second raceway and the rolling element assembly to provide a seal that covers a face of the rolling element assembly at axial ends of the bearing to seal the axial ends of the bearing, the solid lubricant including at least 30 wt. % of graphite, wherein the solid lubricant further includes a binding material and inorganic lubricating nanoparticles having an average size nanometers, the inorganic lubricating nanoparticles composed of metal chalcogenides including substantially spherical nested fullerene like nanospheres.

10. The bearing according to claim 9, wherein the solid lubricant is at least partly attached to the separating element.

11. The bear according to claim 9, wherein the separating element is a spacer positioned between said at least one pair of rolling elements, a portion of a cage structure or a combination thereof.