SU1247317A1 - Belt conveyer - Google Patents

Description

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, in particular to belt conveyors transporting goods over long distances.

The aim of the invention is to increase the reliability of the operation of the conveyor by reducing the load on the belt during its reversal.

FIG. 1 shows a conveyor belt, bat, view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 is a plot of the loads on the idle branch of the conveyor from yush, her P weights Q tape, normal to the working plane of the tape; in fig. 5 is a plot of loads from components, it is 7 weights Q of the tape, tangential to the working plane of the tape (normal to the face plane); in fig. 6 shows plots of roller step size, supporting the tape in width and from the end, from their coordinates („support number n} in FIG. 7 - dependency plots) of the roller and foot values of bridges on their coordinate for a conveyor belt, which also has sections bend single branches of its horizontal and vertical sections.

The belt conveyor contains a flexible working body in the form of a belt 1 installed with tension on the drums 2 and 3, roller bearings 4 supporting the load branch of the conveyor belt, the single branch of the belt 1 supporting roller rollers 5 arranged in width, and roller rollers 6 supporting the belt from the end, single-side, the tape branch has a section with a turning angle around the longitudinal axis of the tape from O to - and a section with a tape turning angle from - to or

from at to 0. On a vertical site of a tape

Two large rollers 7 and one small 8 barrel shaped for better centering of the belt. The roller supports 5 and 6 can be screw-threaded to prevent the tape from slipping over the rollers.

The belt flipping sections are made as long as possible (as far as the total length of the conveyor allows) in order to reduce the torsional tensions in the belt.

The rollers 5 supporting the belt in width are mounted with a variable clamp increasing from the horizontal position of the tape to the vertical, and the rollers 6 supporting the tape from the end are installed with a variable pitch increasing from the vertical position of the tape to the horizontal, and the values of these steps are determined depending on the coordinate / l (support number n) according to the following ratio

/ n / - //, {arcsin (fisin fi) -

2L

-arcsin (n-l).

2L

where tn is the step between the (n-1) st and lth roller-supports, m;

/ g O, 1, 2, 3, ..., (p-1), p, ... is the number of the roller support from the origin for roller bearings supporting the belt in width from the horizontal section of the belt, and for rollers supporting the ribbon with the end, from the vertical section;

p-O - rolikoopora (drum) at the beginning of the section with a tape flip angle from O to -f, from - to and (or) from f

/ „, /„ -Coordinates (distance from the beginning of the coup to the roller)

respectively (n - 1) -th and n-th roller, m;

L is the length of the section with the angle of translation - O to - |, from - | to and (or) from - | - to O, m;

t (2, 4, ..., 3, 0) is the step between

roller rollers and, m. Determine the component P, normal to the working plane of the tape, from the weight Q of the tape (Fig. 2) in section w:

P Qcosa,

 /

Where

0 - uniformly distributed load on the idler branch of the tape from the weight Q;

tm-step roller support, supporting tape width;

and n is the angle of inclination of the tape to the horizontal plane; when the tape is turned from a horizontal section to a vertical, the angle a changes from 0 to

L is the length of the section with the tape turning angle from O to, from to l and (or) from 1 to 0;

1, is the distance from the beginning of the turn (horizontal section of the tape) to an arbitrary cross section.

The component G, tangential to the working plane of the tape (normal to the face plane) of the weight Q of the tape (Fig. 2) in the area of 1m is determined.

T Qsina Qcosp ciottcos,

Ib

Where

/ T - step roller, supporting, tape from the end; R . - the angle of inclination of the tape to the vertical plane, the angle P varies from 0 to when the tape is turned from the vertical to the horizontal section;

/ 6 is the distance from the beginning of the revolution (vertical section of the tape) to an arbitrary section.

The law of load distribution on force P in the section between two roller supports supporting the belt in width (Fig. 4)

9- ocos | one.

(i:

The areas of the diagrams from the load w between two adjacent roller supports are S, 82, 5z, ..., 5 ", ... Step 1 of step is determined from the condition of equality of the loads acting on each section between the roller bearings, i.e.

5 „-, 5„. (2)

Integrating Expression (i), get

5, f ocosf., 9o (sinf

 25 "- sin | / ,;

S. f, oCOsfA, /. 252 sinf-f;: 4

52 (sin | / .- sin§ /,);

S3 (sinJ; / 3-sin | / 2);

5 „, 252 (, - sin | - /“ 2); (3)

S 5e (sinf / -sin§ / ",); (4)

Taking into account (2) and equating the right-hand sides of equalities (3) and (4), get

sin / n-sin | / n-i sin / n i-sin / n 2,

from where

,; ".

  2sin / n i-sin | j- / n 2

(five)

Solving equation (5) for the values of n 1, 2, 3, ..., n and taking into account that, get

sin-fj - Ii l-sin ti;

2L sin / 3 3sin- / i;

22

21

sin§ / n-, (rt-l) ,;

  rtsin i.

where r- / „arcsin (nsin);

In p arcsin ()

similarly

io,

ln-i arssin (rt-l)

(7;

Subtracting the expression (7) from the expression (6), get the formula for determining the pitch of the roller, supporting the width of the tape

in ln-l- {arcsin (nsin | / i) -

Ф 1 -arcsin (rt-l),

()

ABOUT

0

five

0

five

0

five

where h O, 1, 2, 3, .., p-, p, ..., - i, j, rolikoopor from the beginning of the reference from the horizontal section of the tape

 - roller carrier (drum) at the beginning

plot with a tape flip angle

from O to, from -f to and (or) from -

f to o, with a, 0.

The law of load distribution by force

T in the area between the two rollers,

supporting tape from the end

qr ocosll - Repeat the above reasoning, get for the pitch of rollers supporting the tape from the end, the expression is identical to (8), i.e. the step of the rollers supporting the tape from the end is the same as supporting the tape across the width, but in this case the readout is performed from the vertical section of the tape in the direction of the horizontal, i.e. in this case, / r 0, I, 2, 3, ..., n - 1, n, ..., is the number of the roller support from the origin of vertical section of the tape; - roller support for a and (.

FIG. 7 shows the graphs of the magnitudes of the rollers of the rollers supporting the tape in width and from the end, on their coordinates / „. On the sections of horizontal and vertical arrangements of the belt, the pitch of the roller is constant. In the sections of the inclined position of the tape, the pin roller supports obey the proposed relation. In the horizontal sections of the tape, there are rollers that support the tape only in width. On the vertical sections there are barrel-shaped rollers supporting the tape from the end, and vertical cylindrical rollers supporting the tape along the width.

During operation, the loaded conveyor belt 1 bends and pulls the drums 2 and 3 under tension. The load branch of the conveyor belt is supported by cylindrical roller supports 4, and the empty branch in the coup areas is supported along wide 5 and from the end small 6 roller supports that are installed with variable pitch according to the above ratio.

Installing the rollers supporting the idle branch of the conveyor in the coup areas, with variable pitch varying according to the proposed ratio, reduces the material consumption of the conveyor by 8-10%, since less

roller, as well as reducing energy consumption, as the total resistance to the movement of the tape is reduced by reducing the number of supports. Due to load balancing

XI-X1

In each section of the idle branch between the roller bearings, the efficiency and reliability of the belt, and consequently, the entire conveyor, are improved.

ff-6

/

FIG. 2

FIG. five

tftgts tn

n 3 2 ZL

n i 4 /

t 9 / y fffo.

FIG. five

I I

h

ь II

h

1 I

I

about fO2O5O4O506070e09ff ffff

 o Sft / fffaf

ё.

iw -: / {e.} tr and

Go / ziao fTf

i / V fcmk wfffff e /// 7fA emz7b1

wac- / nff

/ O i / 3Of / f7

i / vac / 7

f / r7 & /

r "7; / 7;

)

/ O i / 3Of / f77.

i / vac / 7

f / r7 & /

 ff ef} e / 7a S (Rig. 7

Compiled by G. Nenakhov

Editor L. PovhanTehred I. VeresKorrektor G. Reshetnik

Order 4070/21 Circulation 833Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

TAPE CONVEYOR containing an envelope of a drive and a tension drum tape with a cargo branch located on horizontally located roller bearings, and an idle branch, which is located on the roller turning section around its longitudinal axis on roller rollers located along the width of the belt and from its end, characterized in that, with In order to increase the reliability of the conveyor by reducing the load on the belt during its revolution, the roller bearings of the idle branch of the belt located along its width are placed with a variable pitch increasing in direction from the section with the horizontal position of the tape to the section with its vertical position, and the roller bearings located at the end of the tape are arranged with a variable pitch increasing in the direction from the section with the vertical position of the tape to the section with its horizontal position, the step between the roller bearings is determined by the following the formula t _n = ln-l η — I - iarcsin (nsin ^ Λ) - l 2.L —arcsin [(n – ljsin ^ j}, where t _n is the step between the (η – 1) th and nth roller bearings, m; n = 0, 1, 2, 3, .... (n − 1), | | ... the number of roller supports from the origin for the roller supports supporting the width of the tape from the horizontal portion of the tape, and for the roller supports supporting the tape from the end, from the vertical portion of the tape; n = 0 - roller support (drum) at the beginning of the section with the angle of rotation of the tape from 0 to 4 g, from 4 ^ to π and from to 0; / _n _1, 1 _n —distance from the beginning of the revolution of the tape to the roller support, respectively, of the (n — 1) th and nth roller support, m; L — length of the coup plot; t1 is the step between the roller bearings n = 0 and u = 1, m. SU „, 1247317