RU2183185C2 - Belt conveyor roller support - Google Patents

Abstract

FIELD: transport engineering. belt conveyor roller support has at least two rollers, each provided with housing installed for rotation by means of bearing units at its end faces, skeleton for assembling the rollers into string consisting of parallel guides and cross carrying members arranged between and connected with guides. Each carrying member has socket to install bearing unit at end face of roller. Housing is made in form of length of pipe installed for rotation around its axis. Skeleton is made of two rigid parallel guides connected to frame or conveyor cables by means of detachable hooking units. Guides are curved in vertical and horizontal planes at angles providing required geometry of roller support. Carrying members are rigidly coupled with parallel guides. EFFECT: increased service life of roller support, possibility of usage in conveyors with flexible and rigid flights. 2 dwg

Description

 The invention relates to the field of transport engineering, is one of the main elements of the conveyor belt and can be used, for example, for transporting coal, ore and other materials.

 There are two types of belt conveyors: with a rigid stand and with a flexible (cable) stand. Conveyors with rigid and flexible stands use different roller designs (not interchangeable).

 For the working branch of the tape when transporting bulk goods, multi-roller bearings are used. They are 2, 3 or 5 separate rollers that form a garland of rollers by hinging the axes of the rollers together, or by planting several rollers on a single axis bent at the required angles (see A.O. Spivakovsky and others. Transporting machines . M., Engineering, 1983, S. 107-108). The roller contains an outer cylindrical shell-shell made of a pipe segment, seated by means of bearing assemblies along the ends on the axis. The bearing assembly is a liner worn on the outer ring of the bearing. The insert serves to secure the outer ring of the bearing in the roller housing. The bearing assembly is equipped with a seal. As seals, a non-contact labyrinth seal is used.

 Roller support in belt conveyors is one of the main units responsible for the reliability of the conveyor.

 Having a limited service life, much shorter than the service life of other components, the roller bearing is often replaced, especially for conveyors operating in difficult conditions of the mining industry, which necessitates its cheapness and ease of replacement. Rigid radial bearing mounting, which is used in most belt conveyors, leads to a high proportion of machining in the manufacture of rollers, increases the requirements for precision manufacturing of parts and the quality of their processing, complicates the assembly process and leads to a sharp rise in the cost of the roller bearing, which is also often out of order. Particularly high demands are placed on the quality of the axis machining at the bearing seat. If these requirements are violated, the reliability of the bearing assembly and the roller bearing as a whole decreases sharply.

 Existing roller bearings for flexible stands do not provide the angle of longitudinal inclination of the side rollers, which is necessary for centering the belt when turning the conveyor. The cornering tape is "thrown away" in the opposite direction and the load is poured out. The current trend of increasing the speed of conveyors is forcing the conversion of existing mine conveyors to use a rigid stand, which leads to additional significant costs.

 Known solutions aimed at simplifying the assembly of the roller support and lengthening the service life (see A.S. 459389, B.I. 5, 75g., RF patent 2017678, B.I. 8, 94; A.S. 1715685, B.I. 8, 92), but all these solutions require the installation of additional equipment at machine-building enterprises manufacturing roller bearings, the manufacture of expensive molds, which is not always possible, especially in the current economic conditions. At the same time, the cost of the roller support, or of an individual roller, remains quite high, which does not allow for a simple replacement, without resorting to repair.

 The closest in technical essence is the roller support, presented in the description of the copyright certificate 491549, priority of 07/03/72, the roller support described in the specified copyright certificate is made of articulated longitudinal links and transverse axes on which the axes of the rollers are pivotally mounted. The disadvantage of such a support with a hinged connection of the longitudinal links is that the angle of the longitudinal inclination of the side rollers, which is necessary for centering the belt when turning the conveyor, is not maintained at high loads. The cornering tape is "thrown away" in the opposite direction and the load is poured out. In addition, the challenge remains to reduce the cost of the roller bearing and further increase its maintainability and service life. In case of failure of one of the rollers or the axis on which it is placed, when using the support - the prototype, you will have to disassemble the support, at least two adjacent links. All this leads to the cost of time and money. Then, it is desirable to make the cost of the roller with bearing assemblies so low that when they fail, they could simply be replaced with a new part without resorting to damaged repair. To do this, it is necessary to minimize its metal consumption and labor costs in its manufacture, assembly and repair.

 The technical task for implementing this, therefore, is to further reduce the requirements for the quality of machining parts, increase the ease of replacement, and increase the strength, and increase the life of the roller bearing. In addition, the task of creating a universal roller support, which can be used without significant changes in conveyors. Using both flexible and rigid stands, becomes urgent.

 In the present invention, the problem is solved in that in the roller bearing containing at least two rollers, each of which has a housing mounted for rotation by means of bearing assemblies at its ends, the combination of the rollers in a garland is made using a frame consisting of two parallel guides and located between the last and related transverse load-bearing elements, in each of which there is a socket for mounting a bearing assembly at the end of the roller, the roller housing is made in the form of a pipe segment mounted for rotation around its own axis, while the frame is made of two rigid parallel guides connected to the frame or cables of the conveyor, bent in vertical and horizontal planes at angles that provide the necessary geometry of the roller support, and the bearing elements are connected with parallel guides rigidly. This rigid structure is an independent reusable support element, in which only the rollers located between the specified guides are interchangeable. The design of the frame, which provides the combination of rollers in a garland, allows the use of this roller support in any type of conveyors with both rigid and flexible stands, and also allows the replacement of any of the rollers without disassembling the entire garland, i.e. regardless of other videos.

 The proposed design of the roller support and the roller for it made it possible to simplify the requirements for the accuracy of machining of the bearing assembly, which ensures rotation of the roller.

 The bearing assembly of the end face of the roller for this support has an elastic sleeve for seating the bearing, an annular elastic element between the seat of the bearing assembly and the outer ring of the bearing.

 Further, the invention is illustrated by drawings.

 In FIG. 1 and 2 show a General view of the proposed roller bearings, consisting of three rollers, side view and top view, respectively. Figure 3 schematically shows the implementation of a replaceable roller for a given roller bearings. In FIG. 4 schematically shows an embodiment of a bearing assembly of an end face of a roller and its fastening in a socket of a supporting frame member is shown. Figure 5 is an embodiment of a transverse bearing element with a socket for mounting a bearing assembly.

In the drawings indicated:
1 - roller;
2 - bearing assembly of the end face of the roller mounted in the socket of the bearing element;
3 - rigid parallel guides;
4 - gearing mechanism with a frame or a conveyor cable;
5 - transverse bearing element with a socket for mounting the bearing assembly;
6 - socket for mounting the bearing assembly of the end of the roller;
7 - roller housing;
8 - radial stiffeners;
9 - roller axis;
10 - liner mounting the bearing assembly in the socket of the bearing element (annular elastic element);
11 - bearing;
12 - elastic sleeve;
13 - a lock ring;
14 - a cover of a bearing assembly;
15 - conveyor belt.

 The roller support, therefore, is a garland of rollers 1 with bearing assemblies 2 mounted at their ends. The rollers are placed between two parallel guides 3 made of two strips of sheet steel, bent at the necessary angles that determine the geometry of the roller bearings. The technology with which the geometry of the guides is achieved can be different: welding, stamping from a solid strip. The guides are attached to the frame of the hard stand or to the cables of the flexible stand of the conveyor using detachable gears 4. The transverse supporting elements 5 are rigidly connected to the guides 3, each of which has a socket 6 for installing the bearing assembly 2 of the roller end. An example of a specific embodiment of the socket 6 is shown in Fig. 5. The roller 1 (Fig. 3) consists of a housing 7 in the form of a pipe segment, inside which there is an axis of rotation of the roller, made in the form of segments 9, in each of its ends. The outer ends of the axles are designed to fit the bearing assemblies, and the inner ends are connected to the inner surface of the tubular housing by means of stiffeners 8 welded to the roller housing.

 The bearing assembly is mounted on the axis of the roller using an elastic sleeve 12 made, for example, of rubber. The installation of the bearing unit in the socket of the bearing element is carried out using an annular elastic element 10, which can also be made of rubber and placed between the socket 6 and the outer ring of the bearing 11. Landing of the bearing in the socket of the bearing element and on the roller axis is elastic, which significantly reduces the requirements to precision machining of parts and to the equipment used. The outer end of the bearing assembly is secured with a snap ring 13 and closed with a cover 14 to protect the bearing from dust and dirt.

 Rolikoopora works as follows. In the working position, the rollers 1 support the belt 15. The rigid frame, consisting of guides 3 and the transverse load-bearing elements 5, provides a constant geometry of the conveyor belt regardless of the displacement of the load on the belt during its transportation, and also prevents the belt from slipping on turns when the conveyor speed increases. All inaccuracies in the alignment of the axis that may occur during the manufacture of the rollers are compensated by the elasticity of the elements 10 and 12 of the bearing assembly, which makes it possible not to apply high requirements to the accuracy of the rollers. The rigid and durable frame of the roller support is an independent reusable element of the conveyor with a long life without replacement and does not require complex and accurate equipment for its manufacture. Replacement of any roller is done by simply removing it from the nest of the supporting element and placing a new roller in its place. The design allows the replacement of any roller quickly, simply and without stopping the conveyor, without violating safety precautions.

 The proposed design of the roller bearing made it possible, therefore, to make each roller and each bearing unit independently replaceable and cheap elements, each of which can be easily replaced with a new one without much expense and effort. The design, consisting of guides and transverse load-bearing elements, in this case is an independent reusable support element and withstands 5-6 replacements of rollers. The support is easy to install, reliable and easy to maintain. The rigid frame design ensures the support geometry is maintained under all loading conditions of the conveyor belt. The metal consumption of the proposed support is approximately two times lower than that of conventional supports, the cost price is also significantly lower, with increased service life, reduced weight and simplicity and accessibility of maintenance (maintainability).

Claims (1)

 Roller support of a conveyor belt containing at least two rollers, each of which has a housing mounted for rotation by means of bearing assemblies at its ends, a frame for combining the rollers in a garland consisting of parallel guides and transverse load carriers located between the latter and connected between them elements, each of which has a socket for mounting the bearing assembly at the end of the roller, characterized in that the housing is made in the form of a piece of pipe mounted rotatably around its own axis, while the frame is made of two rigid parallel guides connected to the frame or cables of the conveyor by detachable gears, bent in the vertical and horizontal planes at angles that provide the necessary geometry of the roller bearing, and the bearing elements are rigidly connected to the parallel guides.

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