RU2381978C1 - Belt conveyor roller - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: proposed roller consists of plastic rollers, running independently and being made of "ППТМ10УП" polypropylene with additions of 5% talc, and 10% of rubber. Said plastic rollers are fitted on the shaft, clearance between roller and shaft making 0.5 to 1 mm. Shaft is made from plastic material applied all around metal rod.

EFFECT: higher reliability, reduced wear.

1 dwg

Description

The invention relates to conveyor transport, in particular to structural elements - the composite axes of the rollers of belt conveyors, and can find application in coal, mining and other enterprises.

The composite axis of the conveyor belt roller / USSR copyright certificate No. 673558, M. Cl. 2 B65G 39/06, publ. 07/23/79, bull. No. 27; USSR copyright certificate No. 1247329 A1, M. Cl. 4 B65G 39/06, publ. 07/30/86, bull. No. 28 /, containing two half shafts, the shanks of which are interconnected by a threaded connection.

The disadvantage of such a composite axis of the belt conveyor roller is low rigidity and bending strength due to the fact that the shafts of the axle shafts are made in the form of rods of circular cross section, the moment of bending resistance of which does not have high rates. To date, all the solutions of the inventions are aimed at improving the mechanical connection of the axle shaft design with the connection of the intermediate element, which would not violate the straightness of the geometric component axis of the belt conveyor roller.

Closest to the claimed invention in technical essence, the number of common features and the achieved result is the well-known composite axis of the conveyor belt roller / USSR copyright certificate No. 1798274 A1, M. Cl. 5 B65G 39/00, publ. 02.28.93, Bull. No. 8 /, containing two half shafts with shanks and an intermediate element made in the form of a pipe, the end parts of which are connected with the shafts of the half shafts by one-piece connections. The half shafts are prefabricated and include trunnions with spherical ends located inside the glasses. The mentioned glasses are simultaneously the shafts of the axle shafts. The end parts of the intermediate element are inserted inside the axle shanks and connected to the last welded joints. The axle shafts have stops, and the glasses (shanks) have grooves, which eliminates relative rotation when working as part of a conveyor belt roller.

This composite axis of the conveyor belt roller has a higher bending strength than the analogue, because the intermediate element is made in the form of a pipe, the annular cross section of which has higher bending moment values than the cross section of a round rod equal in area to it shank of the semiaxis of the analog.

A disadvantage of the known composite axis of the belt conveyor roller is the design complexity and low manufacturability of the welded joints of the intermediate element with the shafts of the axle shafts, caused by the need to use expensive welded equipment and tooling when performing welding operations.

In addition, when welding an intermediate element with axle shanks as a result of thermal stresses, the geometric axis of the component axis of the conveyor roller is bent. This causes a misalignment of the bearing seats on the half shafts and, accordingly, a misalignment of the bearings during assembly of the conveyor belt roller, which leads to a partial or complete loss of the latter's working capacity.

We have carried out a systematic feasibility study of belt conveyors using functional-cost analysis.

The basis of the invention is the task by improving the design of the roller conveyor belt to provide a simple reliable Assembly of the roller 3 (see drawing) on the shaft 4, which does not violate the straightness of the geometric axis.

The problem is solved by the fact that during the operation of the conveyor belt which includes plastic rollers, the transported material in the form of a conditionally distributed load acts on each roller that supports the working branch of the conveyor belt and rotates independently regardless of the adjacent one.

Also in our case, there is no connection of the axle shanks with the intermediate element. We have proposed a technical solution for the manufacture of plastic rollers by injection molding from PPTM10UP polypropylene with the addition of 5% talc, 10% rubber, worn on the shaft with a gap between the roller and shaft equal to 0.5-1 mm (established during repeated pilot wear tests )

We make a plastic roll by injection molding, this reduces the cost of production several times.

 The drawing shows the assembly diagram of the roller conveyor belt, General view.

Assembly diagram of the belt conveyor roller: 1 - conveyor frame (corner), 2 - fixed support, 3 - PP roller rotating independently of the shaft, 4 - PP shaft with a metal rod, 5 - metal rod, 6 - bolts for attaching to the frame.

Plastic rollers 3 are put on the shaft 4 with a clearance of 0.5-1 mm. Simplicity of construction with a gap between the roller and the shaft of at least 0.5-1 mm. allows less wear on the roller on the shaft, since abrasive, quarry materials (dust, crumbs, etc.) easily fly between the shaft and the roller.

Literature

1. Zagorodny V.K. Mechanization and authorization of plastic processing. M .: Engineering. 1964. S.242-382.

2. Bernhardt E. Recycling of thermoplastic materials. M .: Chemistry. 1965. S.349-422.

3. USSR Author's Certificate No. 673558, M. Cl. 2 B65G 39/06, publ. 23.07.79, bull. No. 27; USSR copyright certificate No. 1247329 A1, M. Cl. 4 B65G 39/06, publ. 07/30/86, bull. No. 28.

4. Shaitanov V.A., Shaitanov V.V. Functional-cost analysis in management (text) of a monograph - Lipetsk; LSTU, 2005 - 253 p. (A systematic solution to the technical and economic problem using the FSA method).

5. Yakovlev A.D. Technology for the manufacture of plastic products. 3rd ed. L .: Chemistry, 1997, p. 360.

Claims (1)

A belt conveyor roller mounted on a shaft, characterized in that the roller consists of independently rotating plastic rollers made of PPTM10UP polypropylene with the addition of 5% talc, 10% rubber, worn on the shaft with a clearance between the roller and shaft equal to 0 , 5-1 mm, and the shaft is made of plastic with a metal rod in the center.