RU2218999C1 - Method of application of fluorine-containing surfactants on anti-friction bearings - Google Patents

Abstract

FIELD: mechanical engineering; preparation of anti-friction bearings; application of fluorine-containing surfactants on anti- friction bearings. SUBSTANCE: proposed method includes preparation of surfaces by degreasing and drying them, applying coat by dipping bearings in fluorine-containing surfactant solution followed by final drying of coat; it is good practice to perform additional degreasing of surfaces before dipping bearings in solution; coat is applied in solution heated to boiling point and bearings are turned during procedure. EFFECT: enhanced functional capabilities; enhanced efficiency.

Description

 The invention relates to mechanical engineering, and more particularly to machine parts, and can find application in preparing rolling bearings for use, in particular when applying fluorine-containing surfactants to rolling bearings.

 A known method of applying fluorine-containing surfactants, in which perform mechanical cleaning of the surface, degreasing the surface with a solvent, drying the defatted surface in air for 5-8 minutes, then immerse the parts in an epilating solution for 5-7 minutes at ambient temperature, followed by air drying for 5-10 minutes [L. 1].

 The application of fluorine-containing surfactants described in [L. 1] the method allows to increase the wear resistance of the surfaces on which these substances are applied, however, this method, when applied to rolling bearings, is characterized by limited functionality due to incomplete processing of the mating surfaces due to the complex shape of the rolling bodies.

 The invention solves the problem of creating a method for applying fluorine-containing surface-active substances with wide functional capabilities due to a significant increase in the availability of processed surfaces.

 To solve the problem in a method of applying fluorine-containing surfactants to rolling bearings, in which surfaces are prepared by degreasing and drying, coating by immersing the bearings in a solution of fluorine-containing surfactants and the final drying of the coating is proposed according to the present invention , before immersing the bearings in a solution of fluorine-containing surfactants, additionally degrease the surfaces their subsequent drying, coating is carried out in a solution heated to a boiling point, while performing both degreasing and coating, the bearings are rotated.

 The invention is illustrated by example.

As the surfaces onto which fluorine-containing surfactants were applied, the surfaces of the roller bearings of the cam steam distribution mechanism of the turbine were used. The process of applying fluorine-containing surfactants consisted of the following operations:
- surface preparation for coating;
- coating.

 The preparation of the surface for coating consisted of cleaning the surface from mechanical impurities, corrosion products and traces of oil burn and degreasing it.

The degreasing process of the cleaned surface was carried out in several stages:
1) degreasing;
2) intermediate drying;
3) repeated (additional) degreasing;
4) final drying of fat-free surface.

 At the first stage (preliminary degreasing), the surfaces were treated with B-30 gasoline ("galosh"). To do this, the bearing was placed in a bath with the specified solvent, and during degreasing, the bearing cage was periodically rotated. The processing time is 15 minutes.

 At the second stage, after the preliminary degreasing was completed, intermediate drying of the bearing surfaces in air was carried out for 15-20 minutes.

 At the third stage, repeated (additional) degreasing was carried out, during which the bearing surface was treated with hexane. To do this, the bearing was placed in a bath with the specified solvent, and during degreasing, the bearing cage was periodically rotated. The processing time is 15 minutes.

 At the fourth stage, the bearing was dried in air for 15-20 minutes.

 After completion of the preparation of the bearing surfaces, a fluorine-containing surfactant was applied. To do this, the bearing was immersed in a bath with a solution of a fluorine-containing surfactant, which was placed in a "water bath" to ensure uniform heating of the solution. The solution was brought to a boiling point.

 When applying a fluorine-containing surfactant, the bearing cage in a boiling solution was periodically rotated. The duration of the bearing treatment for applying a fluorine-containing surfactant was 15 minutes.

 After removing the bearing from the bath, the finished surface was finally dried in the open air for two hours.

 Sverdlovenergo implemented the claimed technical solution. The implementation of the method confirmed its high performance and wide possibilities for practical implementation in the future.

Literature
1. S. N. Polevoy, V.D. Evdokimov. Hardening of metals. Directory. M., "Engineering", 1986, S. 226-228.

Claims (1)

The method of applying fluorine-containing surfactants to rolling bearings, in which surfaces are prepared by degreasing and drying, and coating by immersing the bearings in a solution of fluorine-containing surfactants and the final drying of the coating, characterized in that before immersing the bearings in the solution carry out additional degreasing of surfaces with their subsequent drying, coating is carried out in a solution heated to boiling point, at ohm when both degreasing and coating is carried cranking bearings.