RU2333119C1 - Method of reducing wear of rails and locomotive wheel flanges - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention can be used for reducing the wear of rails and locomotive wheel flanges. The method of reducing the wear of rails and locomotive wheel flanges includes application of lubricant onto the rail head side face, the said lubricant being composed of oil fuel, mineral oil or a mix of mineral oils and colophony with the following content of components in percentage by weight, i.e., oil fuel content makes 5 to 50%, colophony content varies from 10 to 40%, the content of mineral oil or the mix of mineral oils approximating to 100%.

EFFECT: higher efficiency of protection against wear.

3 cl, 1 tbl

Description

The invention relates to the field of technology of lubrication of wheel-rail systems and can be used to reduce the wear rate of rail tracks, locomotive wheel flanges and rolling stock.

A known method of reducing wear of rail tracks and flanges of railway wheels by applying to the side surface of the rail head a lubricant that contains bitumen, graphite, molybdenum disulfide and an oil-containing hydrocarbon solvent - gasoline that evaporates after applying lubricant to the rail - before the flange of the railway wheels comes into contact with the side surface rail heads (patent RU No. 2065484, 08.20.1996). With the industrial implementation of this method, acceptable indicators are not achieved to reduce the wear of interacting surfaces.

Known methods for reducing wear on rail tracks and wheel flanges of locomotives by applying a coating to the lateral face of the rail head including fuel oil, mineral oil or a mixture of mineral oils, in addition, graphite and / or molybdenum disulfide, as well as solidol, are used in the composition. When implemented, the content of the components varies in the following boundary values, wt.%: Fuel oil 20-65, solid oil 3-20, graphite and / or molybdenum disulfide 1-10, mineral oil or a mixture of mineral oils - up to 100 (patent RU No. 2271382, 03/10/2006); or is, wt.%: fuel oil 3-15, solid oil 3-20, graphite and / or molybdenum disulfide 1.5-4.5, mineral oil or a mixture of mineral oils - up to 100 (patent RU No. 2200184, 03/10/2003. )

These known methods are significantly more effective compared to the lubrication technology, which uses an oil-containing hydrocarbon solvent that evaporates before the contact of the friction surfaces. Nevertheless, their use for a number of reasons, mainly related to insufficient adhesion and bearing capacity of applied rail coatings, does not provide optimal indicators for reducing the wear rate of rail tracks and wheel flanges of locomotives.

A well-known way to reduce the wear of the wheel-rail systems is also considered as an effective complement to the basic technology, namely, the supply of lubricant to the side face of the rail head is combined with the application of lubricant rods on the flange of the wheels of locomotive solid lubricants containing bitumen, graphite and / or molybdenum disulfide (patent RU No. 2278893, 06.27.2006).

This known method also does not provide the necessary degree of reduction in the wear of interacting friction surfaces.

The technical result of the invention is to increase the efficiency of protection of the "wheel-rail" systems against wear.

This technical result is achieved by a method of reducing wear of rail tracks and wheel flanges of locomotives, including applying to the side face of the rail head a lubricant containing fuel oil, mineral oil or a mixture of mineral oils, in which, according to the invention, the lubricant further comprises rosin with the following components, wt. %:

fuel oil 5-50, rosin 10-40, mineral oil or a mixture of mineral oils up to 100;

the lubricant also further contains an anti-wear solid additive, which is used as graphite and / or molybdenum disulfide, with the following components, wt.%:

fuel oil 5-50, rosin 10-40, graphite and / or molybdenum disulfide 1-10, mineral oil or a mixture of mineral oils up to 100;

applying grease to the side face of the rail head is combined with the supply of grease rods to the wheel flange of the locomotive wheels of solid lubricant containing bitumen, graphite and / or molybdenum disulfide.

The anti-wear characteristics of known rail coatings are mainly determined by such components of the compositions as mineral oil (s) and fuel oil with high antifriction properties, solid oil is used as a thickener, and solid additives are effective in industrial practice, mainly for oil “starvation” of track sections due to insufficient frequency of rail application.

The rosin used in the proposed method when feeding it as part of a mixture with mineral oils and fuel oil to the side face of the rail head gives the rail coating unique viscous-adhesive properties, provides it with high bearing capacity and can withstand significant specific loads in a wide range of operating temperatures. Together, this allows you to achieve the highest rates in reducing the wear rate of rail tracks and wheel flanges of locomotives.

Testing of the proposed method was carried out on an experimental installation, including a rotating drum device, filled with materials of various weights and supported by two steel bandages on four steel track rollers, while the load on each of the rollers was at least 0.8 tons.

Oil-containing greases of various compositions were applied to the bandages. The frequency of their application was 1 time in 12 hours. The wear of the mating surfaces (bandage - roller), similar in nature to that observed in the wheel-rail systems, was estimated by the number of metal chips formed during the operation of the installation.

The data obtained are given in the table.

Table
The test results obtained in the experimental setup No. p / p The way to reduce wear of friction surfaces Working hours The content of components in the lubricating composition, wt.% The amount of metal chips formed, g Boundary values Averages one Famous 12 fuel oil - 10, solid oil - 10, graphite - 3, molybdenum disulfide - 1, transmission oil (TSP - 15k) - 20 transformer oil (GK) - 56 12-21 16 2 12 fuel oil - 40, solid oil - 20, graphite - 2, molybdenum disulfide - 1, transmission oil (TSP - 15k) - 37 10-18 fourteen 3 Proposed 12 fuel oil - 5, rosin - 10, transmission oil (TSP - 15k) - 30, transformer oil (GK) - 55 8-12 eleven four 12 fuel oil - 50, rosin - 40, transmission oil (TSP - 15k) - 10, 7-11 9

From the presented data it follows that the proposed method of reducing the wear of mating friction surfaces is more effective than the known one - the amount of metal chips formed is reduced by 21-44%.

At the next stage of experimental work, when testing the known method, solid antiwear additives — graphite or molybdenum disulfide, as well as mixtures thereof — were introduced into the lubricant composition applied to the bandages of the drum device. The content of graphite and / or molybdenum disulfide varied in the lubricant from 1 to 10 wt.%. At the same time, the amount of chips formed did not exceed 8 g at the boundary values of this indicator of 6-10 g.

At the final stage of the tests, a combination of the operations of supplying an oil-containing lubricant to the bandages of a drum device and a lubricant containing bitumen, graphite and / or molybdenum disulfide, to the track rollers, was tested. In the lubricant supplied to the rollers, the content of graphite and / or molybdenum disulfide was 50-70 wt.%, Bitumen - the rest. It was applied using lubricant rods made by technology (patent RU No. 2271385, 03/10/2006), including mixing bitumen, graphite and / or molybdenum disulfide, pressing the resulting composite into a cylinder shape and forming the latter shell by applying an impregnated coating on it epoxy adhesive (epoxy resin and hardener) of filter paper.

Testing of the known method with feeding the lubricant compositions indicated in experiments 1 and 2 of the table to the drum device and applying lubricant to the track rollers with lubricating rods showed that the surface wear, estimated by the formation of chips, was 12 g, with boundary values of 10-14 g .

When testing the proposed method, with the application of rosin-containing lubricant compositions to the bandages of the drum device (experiments 3 and 4 of the table) and the supply of lubricant to the support rollers with lubricant rods, the surface wear amounted to 7 g at boundary values of 4-8 g.

In General, the experiments showed that the proposed method allows to achieve better results in reducing the wear rate of the interacting friction surfaces.

In industrial conditions, tests of the proposed technology to reduce the wear of rail tracks and wheel flanges of locomotives were carried out on sections of the southern run of the Trans-Baikal Railway.

The use of a new method with applying to the side face of the rail head a lubricant containing from 5 to 50 wt.% Fuel oil, 1-10 wt.% Graphite and / or molybdenum disulfide, 10-40 wt.% Rosin, mineral oil or a mixture of mineral oils - to 100, ensured a decrease in wear of rail tracks and wheel flanges of locomotives, respectively, at the level of 20 and 15% in relation to the indicators achieved before its use.

The combination of the operation of applying the proposed composition to the side face of the rail head with the supply of solid lubricant containing graphite and / or molybdenum disulfide 50-70 wt.%, Bitumen - the rest, on the flange of the locomotive wheels with lubricating rods increased the efficiency of lubrication of the friction surfaces and further reduced the wear rail tracks and wheel flanges of locomotives respectively at the level of 6 and 14%.

Thus, the proposed method of reducing wear of rail tracks and wheel flanges of locomotives compared with the known one, provided a higher efficiency of application.

Claims (3)

1. A method of reducing wear of rail tracks and wheel flanges of a rolling stock, comprising applying to a side face of a rail head a lubricant containing fuel oil, mineral oil or a mixture of mineral oils, characterized in that the lubricant further comprises rosin in the following components, wt.%: Fuel oil 5-50 Rosin 10-40 Mineral oil or A mixture of mineral oils Up to 100 2. The method according to claim 1, characterized in that the lubricant further comprises an antiwear solid additive, which is used as graphite and / or molybdenum disulfide, with the following components, wt.%: Fuel oil 5-50 Rosin 10-40 Graphite and / or molybdenum disulfide 1-10 Mineral oil or A mixture of mineral oils Up to 100 3. The method according to claims 1 and 2, characterized in that the lubrication of the side face of the rail head is combined with the supply of grease to the flange of the wheels of the locomotive wheels of solid lubricant containing bitumen, graphite and / or molybdenum disulfide.