RU2238901C1 - Belt conveyor roller - Google Patents

Abstract

FIELD: mechanical engineering; belt conveyors.

SUBSTANCE: spaces filled with composite are formed in belt conveyor roller between bearings and also between cover, body and friction unit. Said composite consists of chips, section 0.1-0.8 x 0.1 - 0.8 mm, of antifriction self-lubricating material, plastic lubricant and solid lubricant taken in the following relationship: chips 60-80 mass parts, plastic lubricant 10-40 mass parts, solid lubricant 10-30 mass parts.

EFFECT: improved wear resistance and increased service life of roller.

1 dwg

Description

The invention relates to transport equipment, in particular to auxiliary devices of the conveyor belt, and can be used to support the conveyor belt.

Known roller conveyor belt, comprising a housing mounted on the axis by means of a self-lubricating bearing included in the support axle (Antifriction materials for special purposes: Sat. scientific. Tr. / Yuzh.-Ros.gos.tekhn.un-t Novocherkassk: SRSTU, 1999, p 84. ISBN 5-88998-096-3). However, this roller has insufficient reliability and durability due to the absence of a sealing element that protects the friction unit from dust, moisture or abrasive particles getting into the tribological contact zone, in particular, when conveyors work in crushed stone, coal, and the like plants. In addition, it should be noted that when the conveyor is operating in extreme operating conditions (heavy shock loads on the conveyor belt), a temperature increase in the contact zone is possible, which in turn requires to reduce the friction and wear of the presence of additional volumes of liquid or solid lubricant in the zone.

A known bearing assembly, including a housing, a plain bearing, an additional reservoir of lubricant in the form of a L-shaped felt ring (V.D. Zozulya. Lubricants for sintered self-lubricating bearings. Kiev: Naukova Dumka, - 1976, p. 28). The disadvantage of this bearing assembly is that the felt, saturated with liquid lubricant, dries and loses its elastic properties at constant temperature drops during start-up of the mechanism, This leads to the fact that the contact of the surface of the felt and the axis ceases and, accordingly, the release and ingress of liquid lubricant into the friction zone. Moreover, fragments of the “dried” felt exhibit abrasive properties over time, which in turn leads to an increase in the friction force and wear of the bearing and the metal axis.

A belt conveyor roller is known, including a fixed axis connected by bearings to a housing inside which cavities are filled with liquid lubricant, which, through special holes, enters the tribological contact zone and lubricates friction pairs (copyright certificate No. 560798, class B 65 G 39/09, 1971). The disadvantage of this roller is that with the slightest violation of the tightness of the sealing elements (and this factor has a special place when the rollers work in the conditions of conveyors for the production of crushed stone, coal and other substances, dust and particles of which have abrasive properties), the lubricant flows very quickly from cavities of the roller outward, which leads to catastrophic wear of friction pairs. Moreover, the lubricant leak occurs independently or the conveyor does not work.

The authors were faced with the task of increasing the durability of the roller by reducing the wear of the friction pairs included in the design of the roller.

This problem has been solved by using chips of a certain cross-section (within 0.1-0.8 × 0.1-0.8 mm) as the lubricant of antifriction self-lubricating material Maslyanit with solid and plastic lubricants adsorbed on it.

The invention is illustrated in the drawing.

The conveyor belt roller contains a fixed axis 1, a cylindrical housing 2. Self-lubricating plain bearings 3 are supported on the axis, forming a cavity filled with a composite consisting of shavings of antifriction self-lubricating material "Maslyanit" on which plastic lubricant (for example, TsIATIM-201) is adsorbed with solid lubricant (for example, graphite) 4. The rotation of the bearings is transmitted from the housing through the bearing axle 5. The axial displacements of the bearings are limited by special external 6 and internal washer 7.

The cavity formed by the lid 8, the housing 2, the axle box 5, the washer 6, the retaining washer 9 and the axis 1, and the sliding bearing 3 is filled with a composite consisting of pressed shavings of anti-friction self-lubricating material “Oil-lubricant” on which a plastic lubricant is adsorbed (for example, TsIATIM-201) with solid lubricant (for example, graphite) 10. Depending on the power of the conveyor and operating conditions, the ratio of the components of the composite is as follows: chips 60-80 weight. hours, grease 10-40 weight. hours, solid lubricant 10-30 parts by weight

Housing, cover and axle box, depending on the power of the conveyor and operating conditions, can be made of metal or structural composite material with a polymer matrix. In the drawing of the proposed roller, in which the housing, axle box and cover are made of structural composite polymer materials.

The video works as follows.

When the roller rotates due to the appearance of a temperature difference on the surface of the tribological contact and the surrounding areas, the liquid lubricant entering the grease with graphite dispersed in it and finely divided fragments of the chip diffuse into the tribological contact zone and lubricate the friction pairs due to the formation of a structurally adaptable self-healing films. During operation, friction pairs are lubricated - the axis-bearing, bearing-external special washer. Of particular importance for the formation of the film are fragments of shavings of the anti-friction self-lubricating material "Oil". This is explained by the special structure of the matrix of this material, which can not be destroyed in the tribological contact zone, but can be rebuilt without destruction. Moreover, this process of formation of a self-healing film is manifested independently of the process of self-lubrication of sliding bearings.

The pressed shavings with the components 10 adsorbed on it in the cavity closed by the lid 8 also perform the functions of a sealing element that prevents dust, moisture and abrasive particles from entering the friction unit.

The proposed belt conveyor roller has increased wear resistance and, consequently, durability due to a more efficient lubrication system and protection of the tribological contact zone, providing continuous flow of liquid lubricants included in the structure of plastic lubricants and solid lubricants, one of which is self-lubricating antifriction shavings material "Oily."

As can be seen from the description, the proposed roller conveyor belt has an inventive step. The test results at the Taganrog factory "Red Kotelshchik" and the Malkinsky crushed stone plant, which showed an increase in the durability of the proposed roller in comparison with those used by 2-3 times, allow us to judge its high efficiency.

A patent information search showed that objects with a combination of the main distinguishing features of the proposed video were not found.

Based on the foregoing, we believe that the proposed device can be protected by a patent of the Russian Federation.

Claims (1)

Belt conveyor roller, including a fixed axis, connected through self-lubricating sliding bearings and axle box with a housing, characterized in that the roller has cavities filled with a composite consisting of cross-section chips (0.1 ÷ 0.8 × 0.1 ÷ 0.8 mm) anti-friction self-lubricating material “Lubricates”, grease and solid lubricant, taken in the following ratio: chips 60 ÷ 80 parts by weight, grease 10 ÷ 40 parts by weight, solid lubricant 10 ÷ 30 parts by weight