DIN-22101

German Industry Standard 2002.8

Continuous mechanical handling equipment

The belt conveying bulkmaterials based on calculation

and design

DIN

22101

ICS 53.040.10 replace the February 1982 edition

Head Times

1 Scope

2 Standards

3 Concept

4 Symbols and units of the formula

5 Volume of throughput and quality of throughput

6 Stable condition of the running resistance and power consumption

6.1 General provisions

6.2 The main resistance

DIN 2002 http://translate.googleusercontent.com/translate_c?hl=en&langpair=zh-CN...

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6.2.1 General provisions

6.2.2 Calculation of the main resistance

6.2.3 Scenarios to determine the friction coefficient f

6.3 Additional resistance


6.3.2 Additional resistance to determine individual

6.3.3 Determination of the total additional resistance

Enhance the resistance of 6.4

6.5 Special resistance


6.5.2 Determination of resistance to individual special

7 Calculation of the drive system


7.2 drive location, size and number of drive motor


7.2.2 Slightly tilted horizontal conveyor and conveyor

7.2.3 Sent on the transport unit

7.2.4 Sending machine under the Transport

7.2.5 And enhance the transport segment with a decline conveyor

7.3 start, brake and stop

7.3.1 Start

7.3.2 Brake and stop

8 The tension of belt tension and


8.2 belt tension required

8.2.1 General Information

8.2.2 Drum circle passing the minimum belt tension force

8.2.3 Limit conveyor belt sag and ensure the correct orientation


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of the minimum belt tension

8.3 upper and lower belt tension changes in the local branch

8.3.1 General Information

8.3.2 stable condition

8.3.3 Non-stable condition

8.4 tensioning and tightening travel

8.5, the local branch of the conveyor belt under tension


8.5.2 Non-stable condition

8.5.3 Stable condition

9 Distribution of surface tension of belt width


9.2 trough transition


9.2.2 Conveyor belts tension distribution

9.2.3 Steel cord conveyor belt tension distribution

9.3 Transition Arc

9.3.1 The level of the transition arc

9.3.2 Vertical transition arc

10 Conveyor Belt Design


10.2 conveyor belt bearing the design of tension members

10.3 Design of conveyor belt cover

11 Minimum diameter drum

12 Trough transitional stage and the design of the vertical curve radius

12.1 General description

12.2 trough to determine the minimum length of transition section



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12.2.2 Conveyor belts

12.2.3 Steel cord conveyor belt

12.3 The minimum radius of the vertical arc to determine the transition


12.3.2 Convex arc transition

12.3.3 Concave arc transition

13 Belt flip design

Annex A (Information) shows the various chapters

Annex B (information) associated with the international standards that

References

Before Introduction

Mining Standards Committee under the standards of the "conveyor belt" working committee to formulatethe scope of work.

Annex A and B used to provide information. Title attachment both to provide information.

The standards relating to the International Organization for Standardization (ISO) standards promulgatedby:

ISO 5048: 1989, ISO / DIS 3780: 1996, ISO 5293: 1981, ISO 3684: 1990 (see Annex B).

Change:Change:Change:Change:

Relative to the DIN 22101: 1982-02 Change for the following aspects:

a) running resistance and power consumption of computing

b) changes in assumptions computing COF

c) wide conveyor belt surface tension of the introduction of distributed computing

d) consider the introduction of a limited non-stable condition

e) safety factor when designing a new conveyor belt measure

f) conduct a comprehensive standard processing

g) update the reference standard

h) of the standard editing

Previously issued standards:Previously issued standards:Previously issued standards:Previously issued standards:


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DIN 1933-07 Part of Mining 2101

DIN 2101 Part II 1933-07 Mining

DIN 2101 Part III 1933-07 Mining

DIN 22101: 1942-02, 1982-02

1 Scope

This standard applies to belt conveyor for conveying bulk materials, and includes the basis of

calculation and design. It is possible, as the proposed mandate to determine the belt conveying theimportant parts (such as driving, braking devices, tension devices) and describes the basic properties ofconveyor belt design methods.

2 standards

This standard includes the label's and the citation of unlabeled forms of the other's version of the

regulations. The standard form of citation in the text parts are to be referenced and cited in laterversions. For the label's citation, if this version has been changed or processing, the version was laterchanged or processing belong to the standard. Citation for unlabeled years, involves only used the lastedition version (including changes).

DIN 15207-1 Continuous mechanical handling equipment - conveyor idlers - Main dimensions of bulk materials- Roller

DIN 22102-1 fabric core - bulk material conveyor - size, quality requirements, identify

DIN 22102-3 fabric core - bulk material conveyor - conveyor belt connected seamlessly Inseparable connection conveyor belt

DIN 22107 Continuous mechanical handling equipment - bulk material conveyor roller layout - maindimensions

DIN 22109-1 Coal Mine Conveyor belts - PVG underground or PVC core with a single conveyor belt- size - Requirements

DIN 22109-2 Conveyor belts for coal mines - underground core with two layers of rubber or PVCconveyor belt - size - Requirements

DIN 22109-4 Coal Mine Conveyor belts - Inoue Rubber core with two layers of rubber conveyorbelt - Size - required

DIN 22110-3 test method for connecting conveyor belt - conveyor belt to determine the fatigue strength ofthe connection point (dynamic testing)

DIN 22112-1 underground mine belt conveyor - roller - Part I - Dimensions

DIN 22112-1 underground mine belt conveyor - roller - Part II - Requirements

DIN 22121 Coal Mine Conveyor belts - two core seamless connection conveyor belt - Dimensions,requirements, marking

DIN 22129-1 Steel cord conveyor underground coal mines - dimensions, requirements

DIN 22129-4 underground coal mine with steel cord belt - connector - Dimensions, requirements


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DIN 22131-1 for general purpose steel cord conveyor transportation technology - connector - Dimensions,requirements

ISO 3684: 1990-3 conveyor belt - the determination of the minimum diameter of roller

3 concept

The following concepts for the application of this standard.

3.1 Belt

The meaning of the standard belt is the use of loop running conveyor belt, conveying a continuous bulk

material conveyor. Bearing belt tension member from the core or steel cord fabric composition, theconveyor belt of rubber or plastic coating manufacturing (for example, according to DIN 22102-1, DIN22109-1, DIN 22109-2, DIN 22109-4, DIN 22129 - 1 and DIN 22131-1), the conveyor roller (for example, accordingto DIN 15207-1, DIN 22112-1 and DIN 22112-2) and bypass the roller bearing, driven by friction or braking(the arrangement of rollers, For example, according to DIN 22107).

4, symbols and units of the formula

Table 1 Symbols and units

Symbol No.

Meaning Justice Single Bit

A Loading area of cross section m 2

A 1 Sections above the horizontal portion of the loading part of thearea of the hypotenuse

m 2 (mm 2)

a)

A 2 When β = 0 ° when the loading section of the area (horizontalcross-section area)

m 2 (mm 2)

a)

A Gr Conveyor belt cleaner and the effective contact area between the mm 2

B Bandwidth mm

C Additional resistance coefficient integrated -

D TR Drum diameter mm

E LGK All conveyor bearing core (with core) the elastic modulus N / mm

F a Acceleration / deceleration of the conveyor belt tension N

F Auf Within a feed zone belt conveyor between the load and the inertialresistance and friction

N

F E Sag resistance N

F Ga Set point on the line resistance of the material reproduced N

F Gb Belt bending resistance N

F Gr The friction belt cleaner N

F H Upper and lower branches of the sum of the main resistance N

F N Additional sum of resistance N

F R Roller rolling resistance N

F Rst Forward resistance N

F S The sum of special resistance N

F Sch Outside the region in the feed zone to accelerate delivery ofmaterials and the friction between the guide wall trough

N

F Schb A feed zone outside the region to accelerate delivery of materialsand guide trough sidewall friction between

N

F Sp The tension of tension roller shaft N

F St Enhance the load transfer the sum of the resistance N


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F T Local tension belt (branch power) N

F Tm Upper and lower branches of the average belt tension N

△ F Tm The average and minimum conveyor belt tension F Tm tension F T, mindifference

N

F Tr Drum circle the sum of driving force N

F T1 Maximum tension belt drive pulley (branch of power) N

F T2 Minimum belt tension drive pulley (branch power) N

F W Stable conditions, the lower branch the sum of running resistance(equal to the sum of drum circle drive)

N

H Conveyor height (when running on H> 0; the next operation when H <0) m

I m Mass throughput kg / s

I m, N Rated the quality of throughput kg / s

I v Throughput volume m 3 / s

I v, N Rated volume throughput m 3 / s

L Drum center distance m

P W Stable conditions required for running resistance on the drive drumcircle the total power

kW

P M Total power drive motor kW

P M, N Drive motor power kW

R a Radius of vertical concave arc transition m (mm) a)

R e Transition arc radius of vertical convex m (mm) a)

S 0 Joint process to consider the safety factor under the conditions ofthe conveyor belt

-

S 1 Taking into account the value of life and the use of load factor ofsafety belt

-

a Acceleration or deceleration m / s 2

b Available bandwidth mm

b s Roller bearing in a side portion of the belt size (only 3 in 2 rollsand rolls into a slot)

mm

b Sch The inner trough width guide M

c R The quality of the roller switch to its calculation of thecoefficient on the circumference

-

c Rank (Rankine) Rankin coefficient -

c Rst Tilt drag coefficient calculated -

c Schb Considering the transportation of materials within the chargingzone and the guide trough side given the quality of thetransmission between the amount of the additional congestion causedby the pressure coefficient of resistance

-

c Tr Coefficient to determine the minimum drum diameter -

c ü Determine the approximate length of the coefficients of thetransition trough

-

d Ab Cleaner material thickness mm

d Gk Longitudinal tensile load bearing pieces of the thickness(excluding, for example, the latitude or longitude)

mm

e Natural logarithms (e = 2.71828 ......) -

e K Conveyor belt by the side of the neutral axis to the center line(with a core center) high

mm

e M Neutral axis from the conveyor belt at the center of the corecenter with a high degree of

mm

f Imaginary coefficient of friction -


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g Acceleration due to gravity (g = 9.81 m / s 2) m / s 2

h Height difference between the local section m

h rel Belt sag and the maximum ratio of the distance between rollers -

h k, o Conveyor trough idler side and the distance between the bottomplane

mm

h k, 1 Edge and the roller conveyor from the plane surface mm

h Tr Transition section of the roller trough trough idlers plane and thedistance between bottom plane

mm

k The ratio of belt tension and bandwidth N / mm

k K Band-edge tension and the ratio of the bandwidth N / mm

k M Center belt tension range and bandwidth than N / mm

k N Rated pull off the conveyor belt the ratio of power and bandwidth N / mm

k t Reference value of fatigue strength of conveyor belt N / mm

k t, rel Conveyor belt relative to the reference value of fatigue strength -

△ k Band edge and band center and bandwidth, the ratio of thedifference between

N / mm

l The length of a section m

l b Length of feeding in the region to accelerate m

l k Trough with a side length of the transition zone m

l M Arrangement of three idler rollers when the shell length of themiddle

m (mm) a)

l Sch Side length of the guide trough m

△ l Length l, the length of the local section of the conveyor belt m

l R Idler Spacing m

l ü Trough the length of transition section m

L Ü; c Steel cord conveyor trough base length of the transition section m

l w Length of conveyor belt flip m

Σ m Quality and non-linear motion conversion drive or brake to itscircle of rotation of the quality and

kg

m 'G Conveyor load zone kg / m

m 'l Uniform length in the transportation sections of the transmissionload of the loads

kg / m

m 'l,, n Rated load capacity of the section of the load generated kg / m

m 'R Roller rolling part of the section loads produces kg / m

n A local section of the number of conveyor -

p Gr Conveyor belt cleaner and the pressure between the N / mm 2

p A Starting with the driving drum-related factors: driving drum

circumferential force F Tr, A, max and conveyors designed to determinethe force F W, max the ratio of

-

p A, O Starting with the driver-related factors: high speed conveyor drivean effective curve when the driving torque and motor torque shall

be fitted with electrical power p M, inst ratio

-

p B Drum brake and brake-related factors: the brake drum

circumferential force F Tr, B and design of conveyor to determine theforce F W, max the ratio of

-

p B, O Braking and braking-related factors: an effective brake torquecharacteristic curve of the brake and the motor torque shall be

fitted with electrical power p M, inst ratioq Identify the main drag coefficient -

s B Brake stroke m


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s Sp Tension roller trip m

t B Braking time s

v Conveyor speed m / s

v o Transmission speed of loading into the transport direction m / s

z L Conveyor belt core layer -

z M Installation of the number of motor -

z R In the local section (upper or lower branch) the number of idlers -

z R, st In the local section (upper or lower branches) adjustable tiltroller group number

-

α Wrap angle around the drum ° orradians

β A 1th part of basal area calculated using the equivalent angle ofrepose

°

β dyn The actual transportation of materials moving by angle of repose °

δ Conveyor angle (when running on δ> 0, the next operation when δ<0)

°

ε Roller tilt angle °

△ ε K Transition arc concave or convex side of the transition arc beltstretching the length of the additional (positive or negative)

-

△ ε K----

The middle of a long transition section limits △ ε K -

△ ε M Concave or convex transitional arc center of the transition arcbelt stretching the length of the additional (positive or negative)

-

△ ε M-

The middle of a long transition section limits △ ε M -

△ ε - The middle of a long transition section center and band edgeconveyor belt stretched between the difference

-

η ges Motor shaft and roller shaft transmission links between the overallefficiency of all

-

λ Branch or branches on the conveyor belt under the slot angle -

μ Conveyor belt and the roller coefficient of friction between the -

μ 1 Conveyor belt and the coefficient of friction between thetransportation of materials

-

μ 2 Conveyor belt and guide the coefficient of friction between thetrough side

-

μ 3 Conveyor belt and the coefficient of friction between the roller -

μ 4 Conveyor belt cleaner and the coefficient of friction between the -

ρ The packing density of the material being transported kg / m 3

φ Effective fill factor -

φ Betr Relative to the conveyor fill factor production conditions -

φ St The total time for the theory of inclined conveyor section area A thof the full coefficient reduction factor

-

φ St, 1 Accumulation of basal area of the triangle theory part of the full

coefficient A 1th reduction coefficient-

a) the formula used in a number of brackets the amount of a given number of units

Table 2 Index (the subject of the meaning)

Symbol No. Meaning JusticeA Starting

B Stop


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a Unstable conditions (start, stop)

eff Effective

erf Need i Section of the loop variable branch

j Turning point belt loop variable

inst Installed

max Maximum

min Minimum

o Upper branch

red Reduction

th Theory u Lower branch

* Loop variable working conditions marked

5 volume and mass throughput throughput

The maximum volume transport belt and the quality of throughput by running on the adjustable conveyor

section area of the charge. Sectional area depends on the conveyor belt loading the dynamic angle ofrepose and loading conditions.

Volume transport in the calculation of the maximum amount of volume and quality of delivery, you should

try to find an equivalent, simple geometric cross-section area. Sectional area A th of the theory is basedon the roller conveyor in conveying the shape and angle of the material conditions to be calculated.

Figure 1 is a three-groove belt idler bearing common area of the loading section.

B

b

β

A 1th

A th

λ A 2th

l M

Figure 1 Three levels of idlers when the theory of charge transfer cross section

Theory of charge from the roller cross-section area of the length and layout (slot angle), the effectivebelt width b, and an equivalent angle of repose β determined, the equivalent angle of repose cross-

sectional area determined by cross-sectional area equal to the actual charge . Effective bandwidth of bdepends on the bandwidth of B:

B ≤ 2000mm b = 0.9 × B - 50mm (1)

B> 2000mm b = B - 250mm (2)


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For a horizontal line running and roller group and stable operation of the inclined conveyor belt canreduce the effective layout of the conveyor belt width.

The level set for the roller conveyor 1, 2 and 3 roll idlers rollers for loading and the actual charge-offsection of the theory of equivalent area A th, the angle β can be calculated with the cross-section area A1th A 2th of and to identify (see Figure 1 and Annex A).

(3)

(4)

Select the equivalent angle of repose depends on the transport of materials and transport length. If notselect the equivalent angle of repose values the experience can be substituted into the followingformula:

For standard dispersed materials, taking β = 20 º; for the second diaspora or similar materials

dispersed, then take β = 20 º the following to the β = 0

º. Only the transportation of materials with ahigh coefficient of friction within the case, the value of β can be greater than the equivalent

accumulation of 20 º angle in Eq.

When there is an idler roller and two neutrons, the middle roller length should be taken l M = 0.

According to the theoretical charge-off area, with the effective coefficient of charge calculated crosssection:

Theoretical volume of throughput: I V, th = A th V (5)

Effective charge coefficient φ = φ Btr φ St

Rated volume throughput: I V, N = φ I V, th (6)

Rated the quality of throughput: I m, N = φ ρ I V, th (7)

Rated load linear load generated: m 'L, N = φ ρ A th (8)

Charge coefficient φ Betr depends on:

- Transport of materials properties;

- Fragmentation;

- Maximum edge length;

- Angle of repose β dyn (mark the actual characteristics of the dynamic heap);

- Belt operating conditions;

- Charging uniformity;

- Linear conveyor;

- Transmission capacity of the reserve.

When the feed conveyor line uniformity and run-time, linear theory of conveyor sections can be fully used

charging


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(Φ = φ Bet r = 1).

Reduction factor φ St reduction in basal area of transportation when tilt A 1, th:

(9)

When the conveyor and the uniform load on the block in a good degree of small materials, can be δ max ≤β dyn substituted into the formula:

(10)

In the application of the formula (9), (10), should note that the maximum tilt angle of delivery only whenthe action is equivalent to the actual angle of repose

β dyn (see Annex A), and in this case only the sectional area A 2, th for the transportation of materials.

6 stable condition of the running resistance and power consumption


According to intensive with all types of conveyor and conveyor line and all of the current state oftechnology envisaged in the production conditions, the results should be similar as possible with the

actual situation. To determine the running resistance, power consumption and local belt tension, providingthe calculation described below.

Easy for simple belt conveyor production conditions, and requirements of the belt is not very highvalues, considering the technical safety requirements under the conditions experienced in the applicationcan reduce the calculation method used.

Calculated running resistance at the beginning, you should estimate the base value. These parametersshould be verified in the calculation process, it may and should be corrected. Calculation should berepeated frequently in order to achieve full compliance with the input value calculation.

Run in a stable condition the resistance generated when the (running resistance) F W from the friction,the sum of gravity and mass derived. Conveyor power consumption P W produced in running resistance andspeed:

P W = F W v (11)

To calculate, the running resistance is divided into:

- Main resistance F H;

- Additional resistance F N;

- Enhance the resistance of F St;

- Special resistance to F S.

The running resistance of and F W, equal to the pass from the drive pulley to the belt circumferentialforce F Tr:

(12)

Sub-form of resistance should be determined. A segment is marked by its substitution parameters, such as


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conveyor angle δ, the friction coefficient f and the imaginary transmission depends on the material m L,and the rotating part of the segmented roller load, there are upper and lower branches constant. Takinginto account the use of EDV - device calculated in the conveyor section of the start and end of the nosefrom the direction of the tail began to establish a running index i (the loop variable) proved to beappropriate. Parameter values on the branch, with o, said that under the branch with u (see Figure 2). To beable to choose a one-time calculation process to determine the identity of a given, turning point for the

conveyor belt and its associated values, should contain the running index j (loop variable) (see Figure 2 andFigure 5).

6.2 The main resistance

6.2.1 General

The main resistance arises from the total length of transmission lines. Parameters should be determinedsegment.

l 2

The direction of the tail 2

F wo2 F wo1

F wu2 1 0 head

F wu1

l 1

Figure 2, the structure and running resistance sub-section calculations

6.2.2 Calculation of the main resistance

Press the upper and lower branches of the resistance is divided into each segment, and the linear

relationship between the moving load, shall determine the segment of the main resistance F H, i:

F H, i = l i ƒ i g [M 'R, i + (m' G + m 'L, i) cos δ] (13)

In determining the belt tension, necessary to determine the main drag on the sub-branch of F H, o, i and thenext major resistance sub-branch of F H, u, i (see 8.3).

Then come the main drag conveyor:

(14)

Downward and upward in the conveyor transport should be based on the rated load range (charge coefficient

φ between the 0.7 to 1.1), and for other loading conditions (loading uneven, in part load and no load)Calculate the main drag, because In this case, the resistance of the standard conditions and may be muchhigher than the resistance.

6.2.3 Determination of imaginary friction coefficient f

Select an imaginary friction coefficient f on the magnitude of the main drag of great significance, andits far greater than the weight, less increase in resistance of conveyor. Focus is always on in the designof safety, should seek to run did not elaborate on the characteristics and values of the friction

coefficient f large intervals calculated with reference to Table 4. Inevitably occur under certain


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conditions over a large parameter specifications. In order to reduce this value, for some segments,provides accurate friction coefficient f is necessary.

Mainly through the idler rollers running resistance and the resistance to determine the friction

coefficient f value. For relatively large degree of belt slack, delivery of materials a large proportion ofthe extrusion resistance.

In order to accurately determine the friction coefficient f, the given boundary conditions bydetermination of running resistance and the pressure roller roller resistance and predict the remaining

resistance (see [2], [3], [4] and [5]). Extrusion resistance for the normal transport of materials should beboth measured values substituted into the load branch (upper branch under normal circumstances), values

from 50% to 85%, 70% of the average friction . For the load of the branch (generally lower branch)friction rate of about 90%. Calculated from the formula:

On the branch: (15)

The following branches: (16)

Substituted into the parameter 0.5 ≤ q o ≤ 0.85, the average q o = 0.7. q u = 0.9.

Table 3 is the basis for prediction coefficient q o.

Table 3 Coefficients of the standard value q o

Special Levy Special Levy Cheng Degree Points Class

Relative belt sag h rel In Etc. High, ≤0.01

Low

Transportation of materialswithin the friction

In Etc. High Low

Care Roll Transport Line Block Force

In Etc. Low High

Pressure Roll Block Force In Etc. Low High

Department The number of q o Standard value

of ≈ 0.7Meter Operators

Less Less

Increase Add

Department Thenumber of q oOf To0.5 0.85

If the value is not measured or experience, according to operating conditions in Table 4 and structuralcharacteristics (see Annex A) to obtain the standard value (see [6]). The standard value is through theupper and lower branches of a large number of measurements and derived the following summary of boundaryconditions:

- 3 groups on the branches of fixed roller group;

- Labyrinth sealed by roller bearings;

- Parameters of the relative conveyor belt sag h rel ≤ 0.01;

- Loading factor φ in the range 0.7 to 1.1.


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Table 4 when the conveyor loading factor in the range of 0.7 to 1.1 when the standard value of the frictioncoefficient f

Special Levy Special Zheng degree classificationTransport of materials within thefriction

In Etc. Low High

Straightening of the beltconveyor

In Etc. Good Poor

Lose Send With Zhang Force In Etc. High Low

Operating conditions (dusty,sticky)

In Etc. Good Poor

Care Roll Straight Diameter 108-159 > 159 <108

The distance between rollers on

the branch Unit: m1.0 to 1.5 <1.0 > 1.5

The distance between rollers

under the branch Unit: m2.5 to 3.5 <2.5 > 3.5

Belt speed Unit: m / s 4 to 6 <4 > 6

Groove angle Unit: ° 25 to 35 <25 > 35

Ambient temperature Unit: ℃ 15 to 25 > 25 <15

Morocco Rub Department Numberof f

Standard value

of ≈ 0.020Meter Operators

Less Less Increase AddTo the value of friction

coefficient f0.010 0.040

If the calculation is not very high accuracy requirements, according to the formula (13), the main dragin the calculation of the friction coefficient when the applied f.

The drive for the generator operation mode, in the design to ensure greater security, with a smaller

friction coefficient f; and the motor drive mode using the larger friction coefficient is f to achievesecurity.

6.3 Additional resistance

6.3.1 General

Additional resistance is generated in the position of individual conveyor friction and inertia.

Additional parts of the resistance F N can be calculated:

6.3.2 Determination of single additional resistance

Feeding at the transportation of materials within the inertial resistance and belt and frictionbetween:

F Auf = I m (v - v 0) (17)

In a feeding area at speed delivery of materials and the friction between the guide trough side:

b Sch

λ


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l M

Figure 3 arrangement of guide trough

3 groups arranged on the charge roller point, b Sch> l M for (see [6]):

(18)

0 ≤ v 0 ≤ v

(19)

(20)

- B Sch ≤ l M, the substitution l M = b Sch;

- 2 roller arrangement, the substitution l M = 0;

- 1 group of roller arrangement, the substitution l M = b Sch;

- Other types of roller arrangement (eg, roller group 5), calculated according to the followingconditions:

- A) range from feeding the volume throughput and transmission speed (v + v 0) / 2 find the materials andguidance in the trough side height;

- B) Find the flow on the lead trough side pressure, in some cases with c Schb and c Rank;

- C) the average pressure from the side surface, the friction coefficient and the magnitude of thefrictional resistance obtained.

Desirable for the general structure of the belt conveyor:

c Schb c Rank = 1 (see Annex A)

Coefficient of friction μ 1 and μ 2 is usually 0.5 to 0.7 range.

The friction belt cleaner:

Cleaning the conveyor belt with the scraper, the friction is:

F Gr = μ 4 p Gr A Gr (21)

Under normal circumstances, the pressure parameter p Gr at 0.03 N / mm 2 到 0.1 N / mm 2 range, the frictioncoefficient μ 4 of about 0.6 to 0.7.

Additional sum of resistance by the following formula:

F N = F Auf + F Schb + F Gr (22)

Other belt around the drum when the resistance is the bending resistance and non-driving roller bearing

resistance. Both the resistance is the resistance with respect to the above in almost all cases small


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enough to be negligible. Literature should be required (see [1]) were calculated.

6.3.3 Determination of the total additional resistance

Additional resistance when the proportion of the total resistance is very small, such as L > 80 meters ofconveyor and conveyor more than only one loading point, the need to determine the total from the main

drag in additional resistance. You can drag coefficient C to consider the additional sum (see [1]):

F N = (C -1) F H (23)

Coefficient C values in Table 5.

Table 5 when the conveyor loading factor φ in the range of 0.7 to 1.1 when the coefficient of the standardvalue of C

L, m 80 100 150 200 300 400 500 600 700 800 900 1000 1500 ≥ 2000C 1.92 1.78 1.58 1.45 1.31 1.25 1.20 1.17 1.14 1.12 1.10 1.09 1.06 1.05

Enhance the resistance of 6.4

Conveyor belt and the transportation of materials, enhance the resistance of each segment:

F St, i = h i g (m 'G + m' L, i) (24)

The total increase resistance:

(25)

h i = l i sin δ i (26)

(When transported on a conveyor: h i> 0; δ i> 0, when the conveyor under the transport: h i <0; δ i <0).


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DIN-22101