Rolling bearing, rotating machine element, and solid-film formation method

Patent metadata

Field	Value
Publication number	US-10288120-B2
Application number	US-201715614716-A
Country	US
Kind code	B2
Filing date	Jun 6, 2017
Priority date	Jun 10, 2016
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a first liquid film (adhesion step). The adhering first liquid film is hardened to form the solid film on the bearing component. The rolling bearing including the bearing component with the solid film formed thereon is rotated. The rolling bearing is washed in a washer fluid containing the same lubricant as that used in the adhesion step, and the washer fluid is allowed to adhere to the bearing component as a second liquid film. Then, the adhering second liquid film is dried.

First claim

What is claimed is:

1. A solid-film formation method for forming a solid film on at least one of bearing components of a rolling bearing including, as the bearing components, an inner ring, an outer ring, and a plurality of rolling elements interposed between the inner ring and the outer ring, the solid-film formation method comprising:
allowing a solution containing a fluorine-containing component and a lubricant having no functional group to adhere to the at least one of the bearing components as a first liquid film;
forming the solid film on the at least one of the bearing components by hardening the adhering first liquid film;
rotating the rolling bearing including the bearing component provided with the solid film;
washing the rolling bearing in a washer fluid containing the same lubricant as the lubricant used in allowing the solution to adhere to the bearing component, and allowing the washer fluid to adhere to the bearing component as a second liquid film; and
drying the adhering second liquid film.

2. The solid-film formation method according to claim 1 , wherein the fluorine-containing component contains 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components.

3. The solid-film formation method according to claim 2 , wherein the solution is prepared by adding the fluorine-containing component and the lubricant to a solvent,
the lubricant is perfluoropolyether,
the solvent is an ether containing at least one of ethyl nonafluoroisobutyl ether and ethyl nonafluorobutylether, and
the washer fluid is prepared by diluting the lubricant with the solvent.

4. The solid-film formation method according to claim 1 , wherein
in the solution, the fluorine-containing component has a higher mixture rate than the lubricant.

5. The solid-film formation method according to claim 2 , wherein
in the solution, the fluorine-containing component has a higher mixture rate than the lubricant.

6. The solid-film formation method according to claim 3 , wherein
in the solution, the fluorine-containing component has a higher mixture rate than the lubricant.

7. A rolling bearing comprising:
an inner ring, an outer ring, and a plurality of rolling elements interposed between the inner ring and the outer ring as bearing components, wherein
at least one of the bearing components is provided with a solid film of a fluorine-containing component containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components,
the solid film contains a lubricant dispersively added to the solid film and having no functional group, and
a rate of a part of a surface of the solid film occupied by the lubricant is higher than a rate of a part of an interior of the solid film occupied by the lubricant.

8. A rotating machine element comprising:
a component member that is rolling contact with another component member, wherein
the component member is provided with a solid film of a fluorine-containing component containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components,
the solid film contains a lubricant dispersively added to the solid film and having no functional group, and
a rate of a part of a surface of the solid film occupied by the lubricant is higher than a rate of a part of an interior of the solid film occupied by the lubricant.

9. A solid-film formation method for forming a solid film on a component member of a rotating machine element that is in rolling contact with another component member, the method comprising:
allowing a solution containing a fluorine-containing component and a lubricant having no functional group to adhere to the component member as a first liquid film;
forming the solid film on the component member by hardening the adhering first liquid film;
allowing the rotating machine element including the component member provided with the solid film to perform a rotating operation;
washing the rotating machine element in a washer fluid containing the same lubricant as that used in allowing the solution to adhere to the component member, and allowing the washer fluid to adhere to the component member as a second liquid film; and
drying the adhering second liquid film.

Assignees

• Jtekt Corp

Inventors

• Yamakawa Kazuyoshi

Classifications

• C10M2227/04

  having a silicon-to-carbon bond, e.g. organo-silanes · CPC title

• C10M2207/121

  having hydrocarbon chains of seven or less carbon atoms · CPC title

• C10M2209/084

  Acrylate; Methacrylate · CPC title

• C10M177/00

  Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes · CPC title

• C10M141/12

  at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10 · CPC title