SU1189874A1 - Antifriction additive for lubricating material - Google Patents

Abstract

Application 3,

Description

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4i The invention relates to the creation of highly effective lubricants, specifically to the application of the known substance 3,3 - (2-hydroxyphenyldithio) -4,4-dioxydiphenyl (PODF) of dyes previously used in the synthesis, as an anti-friction set for lubricants. The purpose of the invention is to improve the antifriction properties of lubricants. Comparative testing of the oxyphenyl product of acirinase (PODF), as well as the known diphenylsulfide (DFDS) and dibenzylsulfide (DBDS), is carried out under liquid and dry friction conditions when introducing the tested additives into lubricants. The latter are mineral oils — MVP, MS-20, polymers phenolic formaldehyde resin LBS-3, polycaproamide PA-B, composite material — AF-ZT, and also a grease lubricant — grease US-2. Testing the effectiveness of antifriction effect of additives introduced into mineral oil in the amount of 0.2, 0.4, 0.8 wt.%, Is carried out in the course of friction of the same steel (St.45) and carbide (alloy VKb) specimens with a diameter of 9 mm. the cylinder to the cylinder on the UTT-1 face friction unit, at a rotational speed of 1780 rpm and load, respectively, 6.9 and 12.1 MPa for steel and hard alloy. The coefficient of mutual overlap is equal to one. The test metal samples before the start of the pig iron are ground to a roughness of RO, 0.6-0.7 µm (Art. 45 and RC 0.3-0.4 µm (alloy VK6). During the tests, the oil temperature, frictional force, value and the rate of linear wear of the samples. At the end of the experiments, the roughness of the samples was determined on a profilograph-profilometer 14, the tests were carried out until a sharp increase in frictional force characterizing the adhesion of metal surfaces. Anti-wear and extreme-pressure properties of sulfur-containing additives friction is tested on a bench made on the basis of the 1S-2 machine designed to study the friction of the conical supports.The axial load on the polymer material in which the sulfur-containing additive is introduced in an amount of 0.4 wt.% is 50 N at Spindle rotational speeds of 15,000 rpm Testing is carried out for 1 hour. The material of the counterbody is the hard alloy VKb. The wear of polymer fittings is fixed by measuring the diameter of the plain bearing, as well as by the method of artificial bases - hard alloy. The effect of the concentration of sulfur-containing additives on the antifriction properties of MS-20 lubricating oil (friction coefficient, wear rate of materials of conjugation, for which steel samples are used) is shown in Table 1; The results of the study of the effect of a sulfur-containing additive, taken in an amount of 0.4 wt.%, on the lubricity of low-viscosity oil MPV, whose characteristics are wear rate, coefficient of friction, oil temperature, duration of friction, and surface roughness are given in Table 2. . In this case, both steel and carbide specimens are examined. The data presented in Table 1 shows that the use of the proposed additive (PODF) in comparison with the known ones (DBDS, DFDS) allows to halve the wear rate of the mating materials while reducing the coefficient of friction by 1.5-2 times concentration areas of 0.2-0.8 wt.%. From tab. 2, it follows that the use of the oxyphenyl product of the polymerisation in comparison with the known additives allows reducing the wear rate not only of steel, but also carbide parts by 2-3 times, reducing the thermal load of friction by reducing the coefficient of friction by 1.2-2 times and accordingly increase the duration of friction with a single lubricant by 2-3 times. There is also a significant decrease in the roughness of the hard alloy after the end of the running-in period, which indicates high anti-seize and anti-wear properties of the proposed additive. The study of the antifriction effect of sulfur-containing additives, which are introduced into polymeric materials and compositions based on them, makes it possible to establish the high effectiveness of the use of the oxyphenyl carbonate products (YYDF) as an anti-wear additive.

The anti-wear properties of sulfur-containing additives when introduced into polymeric materials (H, N 15,000 rpm) are given in Table. 3

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The data obtained indicate that the use of an additive (PODF) is possible in the dry friction units by introducing the latter into a polymer or composite material. Compared with the known additive (DBDS), the proposed allows significantly (1.5-3 times) to increase the wear resistance of the counterbody 10 while reducing the wear of the polymer material or composite.

Table 1

Intensity of wear, J-IOS m / m

Temperature in the zone

friction

Friction coefficient, pr.

table 2

0.084 3.81 0.071 2.03 0.019 0.76

85 110 85 110 60 100 0.114 0.27 0.082 0.25 0, OZA 0.22 Duration of friction with a single 1.0 0.2 1.8 lubricant, f, h Surface roughness RC, mic, 0.6-0.8 - 0.6-0.8

Continued table. 7

Table 3 0.3 2.7 0.5 6.2 1.0 - 0.6-0.8 0.1-0.2

Claims (1)

The use of 3,3 '- (2-hydroxyphenyldithio) -4,4 * -oxydiphenyl formula as an antifriction additive to lubricants. 00 with 00 m 4 ^ > 1 1.189874 2