SU1749134A1 - Apparatus for centering conveyer belt - Google Patents

Abstract

Usage: centering conveyor belt. SUMMARY OF THE INVENTION: The device includes a frame, a swivel roller with brackets for middle and side rollers and supports. The latter are supported on rollers. The brackets are hinged. The surface of the supports is made convex. When the tape comes off, the roller support rotates. Due to the shape of the supports, the resistance to rotation of the roller supports is reduced. 4 il.

Description

h

W

t

The invention relates to conveyor equipment, namely, devices for centering a conveyor belt.

The known roller support for centering the conveyor belt includes a fixed frame and a pivot bearing with cantilever tapered rollers, the frame being provided with arcuate guides cooperating with the tapered rollers.

It is also known a device for centering a conveyor belt, containing a roller around a vertical axis, provided with deflector rollers that interact with the belt when it is displaced, the roller support provided with cam-shaped elements mounted on rollers mounted on the carrier beams of the conveyor frame.

A disadvantage of the known device is an increase in the resistance to rotation of the roller wheels in proportion to the angle of its rotation due to an increase in the groove. Additional compression of the load can lead to a see of the bead of the tape on the deflection roller and cause inoperability of the device.

The purpose of the invention is to increase the reliability of the device by reducing the rotational resistance of the roller bearings around the vertical axis. The annual economic effect per device is 500 rubles.

This goal is achieved by the fact that in the device, which includes a roller support mounted around the vertical axis, having a bracket for an intermediate roller and brackets for side rollers and supports with an arcuate surface, the latter are mounted with possible VI

N Yu

CJ

four

The rollers on rollers mounted on the frame, the brackets of the side and central rollers are connected by hinges with horizontal axes, and the supporting elements have a convex profile, the curvature of which increases from the axis of symmetry to the edges according to

H - l {sln ft-sin arctg (tg ft cos d)}, where H is the change in the curvature of the support surface in the vertical plane;

I - the length of the brackets side and center rollers:

i is the angle of inclination of the side rollers when the axis of the rollers coincides with the axes of the supporting elements;

and - the angle of rotation rolikoopori.

FIG. 1 shows a device for centering a conveyor belt, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. 2; in fig. 4 shows a calculation scheme for determining the curvature of the supports with an arcuate surface in the x-axis coordinates XYZ.

 The device for centering the conveyor belt consists of rollers 1. including side 2 and middle 3 rollers mounted on brackets 4 connected by hinges 5 with horizontal axes of rotation. Deflector rollers 6, interacting with the edges of the tape 7 when it is removed, are fixed on levers 8, rigidly connected to the bracket 4 of the middle roller 3. Roller support 1 can be rotated about the vertical axis 9. The supports 10 are fixed to the brackets 4 side rollers 2 with arcuate surfaces. The supports 10 are mounted for rolling on rollers 11. mounted on the frame of the conveyor 12. The arcuate surfaces of the supports 10 are convex with a curvature that increases from the axis of their symmetry to the edges and is determined from the expression

H l {sir ft-sin arctg (tg ft cos, where H is the curvature of the arcuate surface of the supports, mm;

I is the length of the brackets for the middle and side rollers, mm; .

a - angle of rotation of the roller around a vertical axis, hail;

ft is the angle of inclination of the side rollers to the horizontal when the longitudinal axis of the roller and the axis of symmetry of the arcuate surface of the supports are located in the same vertical plane, degrees.

The basis for the conclusion of the above dependence is the condition: the projection of the angle of inclination of the side rollers is constant, does not depend on the angle of rotation of the roller bearing support and is equal to ft. Consider the design scheme (Fig. 4). In the neutral position (the tape travel is central), the hinge 5 has coordinates (Y0, Z0), and the end

side roller 2, which is attached to the support 10 (X0; Y0; Z0). When turning the roller 1 at an angle a, the coordinates of the hinge 5 changes to (X; Y; 2), and the end of the side roller 2 changes to (X; Y, Z). moreover, Zo Z, i.e.

there is a lowering of the end of the side roller 2. Write the coordinates:

-, g

Y, -0

(X jl I co- / l {j cos /))

rVO

I lnft

fx - x 1 cos a -1 cos cz-i (- h-cos / 1) / r - jl 51PGL-1 ros / l hsi-l (j 4)

(7 I s.n / j

20

where ft is the angle of inclination of the side roller, with

turn rolikoopori angle a (ft pjt

From the likeness of a right triangular 5

forks defined by the points AX0X0 we obtain the relations: 1

and BX

Zo Ho - X o

z 3 SG

I sin / I cos ft

X-X I -sin / 1 I -cos / 31 cosG

where f

ft arctgftg ft cos ex}. The change in curvature of the arcuate surfaces of the supports 10 is determined

H Z0 - Z l {sln ft-sin arctg (tg / cos «)}. For a B2000 conveyor, the angle of inclination of the side rollers is 2 ft 45 °, and I is 1 m. The curvature of the arcuate surfaces of the supports 10 at 5 angle of rotation of the rollers 1 and 3 ° will be H I - {sin 45 ° - (tg 45 ° - cos 3 °) }

5 ° - Yu-4 m.

The conveyor belt comes off and, with its edge 7, acts on one of the deflection rollers 6. Through the lever 8, the force will be transmitted to the roller 1, which will begin to turn around axis 9, the supports 10 with arcuate surfaces

5 will move along the rollers 11, while the ends of the brackets 4 of the side rollers 2, on which the supports 10 are fixed, will start to fall, and the opposite ends will turn relative to the hinges 5. When

When the belt returns to its central position, it acts on the opposite deflection roller 6, the device returns to its original position. In this case, a reduction in the moment of resistance5 to the rotation of the roller bearings due to the maintenance of a constant, cross-section, grooving of the conveyor belt, the elimination of internal friction and movement of the load during the passage through the roller support, and a decrease in belt wear is achieved.

Claims (1)

Apparatus of the Invention A device for centering a conveyor belt, including a frame mounted on a frame that pivots about a vertical axis, has a bracket for an intermediate roller and brackets for side rollers and supports with an arcuate surface, mounted with the possibility of rolling on rollers mounted on a frame that are that, in order to increase the reliability of the device by reducing the rotational resistance of the roller bearings around the vertical axis,  t-ggl FIG. 2 The theins for the middle and side rollers are connected to hinges that have horizontal axes, and the arcuate surface of the bracket supports is convex with a curvature increasing from the axis of symmetry to the edges according to H l {sin ft - sln arctg (tg ft COS a}, where H is the change in curvature of the arcuate surface; I - the length of the brackets of the middle and side rollers; ft is the angle of inclination of the side rollers when the axis of the rollers coincides with the axles of the supports; a - angle of rotation rolikoopori. 12 12 tut. four