DIN 22101

DIN 2002

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German Industry Standard 2002.8 Continuous mechanical handling equipment

DIN

The belt conveying bulk 22101 materials based on calculation and design 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


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 6.3.1 General provisions 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 6.5.1 General provisions 6.5.2 Determination of resistance to individual special 7 Calculation of the drive system 7.1 General provisions 7.2 drive location, size and number of drive motor 7.2.1 General provisions 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 8.1 General provisions 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

DIN 2002

http://translate.googleusercontent.com/translate_c?hl=en&langpair=zh-CN... 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 8.5.1 General provisions 8.5.2 Non-stable condition 8.5.3 Stable condition 9 Distribution of surface tension of belt width 9.1 General provisions 9.2 trough transition 9.2.1 General provisions 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 10.1 General provisions 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 12.2.1 General provisions

DIN 2002


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 12.3.1 General provisions 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 Mining Standards Standards Committee Committee under the standards of the "conveyor "conveyor belt" working working committee committee to formulate formulate the 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 promulgated by:

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

DIN 2002


DIN DIN 1933-07 Part of Mining 2101 DIN 2101 Part II 1933-07 Mining DIN 2101 Part III 1933-07 Mining DIN DIN 22101: 1942-02, 1982-02

1 Scope This This stand standar ard d appl applie ies s to belt belt conv convey eyor or for for conv convey eyin ing g bulk bulk mate materi rial als, s, and inclu include des s the the basi basis s of calculation and design. It is possible, as the proposed mandate to determine the belt conveying the important parts (such as driving, braking devices, tension devices) and describes the basic properties of conveyor belt design methods.

2 standards This standard standard includes includes the label's label's and the citation citation of unlabeled 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 later versions. For the label's citation, if this version has been changed or processing, the version was later changed or processing belong to the standard. Citation for unlabeled years, involves only used the last edition 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 fabric core core - bulk bulk materi material al convey conveyor or - convey conveyor or belt belt connec connected ted seamle seamlessl ssly y DIN 22102-3 fabric Inseparable connection conveyor belt Continuou uous s mechan mechanica ical l handli handling ng equipm equipment ent - bulk bulk materi material al convey conveyor or roller roller layout layout - main main DIN DIN 22107 Contin dimensions

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

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

DIN 22110-3 test method for connecting conveyor belt - conveyor belt to determine the fatigue strength of the 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

DIN 2002


transportation n technology technology - connector connector - Dimensions Dimensions, , DIN 22131-1 for general purpose steel cord conveyor transportatio 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. Bearin Bearing g belt belt tensio tension n member member from from the core or steel steel cord cord fabric fabric compos compositi ition, on, the conveyor belt of rubber or plastic coating manufacturing (for example, according to DIN 22102-1, DIN 22109-1, DIN DIN 22109-2, DIN 22109-4, DIN 22129 - 1 and DIN 22131-1), the conveyor roller (for example, a ccording to DIN 15207-1, DIN 22112-1 and DIN roller bearing, bearing, driven by friction friction or braking braking DIN 22112-2) and bypass the roller (the arrangement of rollers, For example, according to DIN DIN 22107).

4, symbols and units of the formula Table 1 Symbols and units

Symbol Meaning Justice No. A Loading area of cross section A 1 A 2 A Gr

Sections above the horizontal portion of the loading part of the area of the hypotenuse When β = 0 ° when the loading section of the area (horizontal cross-section area) Conveyor belt cleaner and the effective contact area between the

Single Bit

m2 m 2 (mm 2) a)

m 2 (mm 2) a)

mm 2 mm mm N / mm N

D TR

Bandwidth Additional resistance coefficient integrated Drum diameter

E LGK

All conveyor bearing core (with core) the elastic modulus

F a

Acceleration / deceleration of the conveyor belt tension

F Auf F E

Within a feed zone belt conveyor between the load and the inertial N resistance and friction N Sag resistance

F Ga

Set point on the line resistance of the material reproduced

F Gb

Belt bending resistance

F Gr

The friction belt cleaner

F H

Upper and lower branches of the sum of the main resistance

F N N

Additional sum of resistance

F R

Roller rolling resistance

F Rst

Forward resistance

F S

The sum of special resistance

F Sch

F Sp

Outside the region in the feed zone to accelerate delivery of materials and the friction between the guide wall trough A feed zone outside the region to accelerate delivery of materials N and guide trough sidewall friction between N The tension of tension roller shaft

F St

Enhance the load transfer the sum of the resistance

B C

F Schb

N N N N N N N N N

N

DIN 2002


F T

Local tension belt (branch power)

F Tm

Upper and lower branches of the average belt tension

△ F Tm The average and minimum conveyor belt tension F Tm tension F T, min difference F Tr Drum circle the sum of driving force

N N N N N N N

F T1

Maximum tension belt drive pulley (branch of power)

F T2

Minimum belt tension drive pulley (branch power)

F W

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

H

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

I m

Mass throughput

I m, N

Rated the quality of throughput

kg / s kg / s

I v

Throughput volume

m3 / s

I v, N

Rated volume throughput

P W

m3 / s m Drum center distance Stable conditions required for running resistance on t he drive drum kW

P M

circle the total power Total power drive motor

P M, N

Drive motor power

kW kW

R a

Radius of vertical concave arc transition

m (mm) a)

R e

Transition arc radius of vertical convex

L

S 0 S 1 a b bs b Sch

m (mm) a) Joint process to consider the safety factor under the conditions of the conveyor belt Taking into account the value of life and the use of load factor of safety belt Acceleration or deceleration m/ s 2 mm Available bandwidth Roller bearing in a side portion of the belt size (only 3 in 2 rolls mm and rolls into a slot) M The inner trough width guide

c R

The quality of the roller switch to its calculation of the coefficient on the circumference

-

c Rank

(Rankine) Rankin coefficient

-

c Rst

Tilt drag coefficient calculated

-

c

Schb

c Tr cü d Ab

Considering the transportation of materials within the charging zone and the guide trough side given the quality of the transmission between the amount of the additional congestion caused by the pressure coefficient of resistance Coefficient to determine the minimum drum diameter Determine the approximate length of the coefficients o f the transition trough Cleaner material thickness

mm mm

d Gk

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

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 Neutral axis from the conveyor belt at the center of the core center with a high degree of Imaginary coefficient of friction

mm

eM f

mm -

DIN 2002


g

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

m/ s 2

h

Height difference between the local section Belt sag and the maximum ratio of the distance between rollers

m mm

h rel h k, o h k, 1 h Tr

Conveyor trough idler side and the distance between the bottom plane Edge and the roller conveyor from the plane surface

mm Transition section of the roller trough trough idlers plane and the mm

k K K

distance between bottom plane The ratio of belt tension and bandwidth Band-edge tension and the ratio of the bandwidth

k M

Center belt tension range and bandwidth than

k N N

Rated pull off the conveyor belt the ratio of power and bandwidth

k t

Reference value of fatigue strength of conveyor belt

k t, rel

Conveyor belt relative to the reference value of fatigue strength

△ k

l b b

Band edge and band center and bandwidth, the ratio of the difference between The length of a section Length of feeding in the region to accelerate

l k

Trough with a side length of the transition zone

l M l Sch

Arrangement of three idler rollers when the shell length of the middle Side length of the guide trough

△ l

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

l R

Idler Spacing

l ü

Trough the length of transition section

L Ü; c

Steel cord conveyor trough base length of the transition section

l w

Length of conveyor belt flip

Σm

Quality and non-linear motion conversion drive or brake to its circle of rotation of the quality and Conveyor load zone

k

l

m 'G m 'l m 'l,, n m 'R n p Gr p A

Uniform length in the transportation sections of the transmission load of the loads Rated load capacity of the section of the load generated Roller rolling part of the section loads produces A local section of the number of conveyor Conveyor belt cleaner and the pressure between the Starting with the driving drum-related factors: driving drum circumferential force F Tr, A, max and conveyors designed to determine

N / mm N / mm N / mm N / mm N / mm N / mm m m m m (mm) a) m m m m m m kg kg / m kg / m kg / m kg / m N / mm 2 -

the force F W, max the ratio of p A, O

Starting with the driver-related factors: high speed c onveyor drive an 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 the

p B, O

q s B

-

force F W, max the ratio of Braking and braking-related factors: an effective brake torque characteristic curve of the brake and the motor torque shall be fitted with electrical power p M, inst ratio Identify the main drag coefficient Brake stroke

m

DIN 2002


s Sp

Tension roller trip

t B

Braking time

v vo

Conveyor speed Transmission speed of loading into the transport direction

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 tilt roller group number Wrap angle around the drum

α β

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

β dyn δ

The actual actual transp transport ortati ation on of materi materials als moving moving by angle angle of repose repose

Conveyor angle (when running on δ> 0, the next operation when δ <0) Roller tilt angle ε △ ε K Transition arc concave or convex side of the transition arc belt stretching 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 arc belt stretching the length of the additional (positive or negative) △ ε M The middle of a long transition section limits △ ε M

m s m/ s m/ s ° or radians ° ° ° °

-

-

-

μ3

The middle of a long transition section center and band edge conveyor belt stretched between the difference Motor shaft and roller shaft transmission links between the overall efficiency of all Branch or branches on the conveyor belt under the slot angle Conveyor belt and the roller coefficient of friction between the Conveyor belt and the coefficient of friction between the transportation of materials Conveyor belt and guide the coefficient of friction between the trough side Conveyor belt and the coefficient of friction between the roller

μ4

Conveyor belt cleaner and the coefficient of friction between the

-

ρ

The packing density of the material being transported

φ

Effective fill factor Relative to the conveyor fill factor production conditions

kg / m 3 -

△ ε η ges λ μ μ1 μ2

φ

Betr

φ St φ St, 1

-

-

The total time for the theory of inclined conveyor section area A th of the full coefficient reduction factor 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. No. Mean Meanin ing g

A B

Starting Stop

Justice

DIN 2002


a eff erf

Unstable conditions (start, stop) Effective

i j inst max min o red th

Section of the loop variable branch Turning point belt loop variable Installed Maximum Minimum Upper branch Reduction

u *

Lower branch Loop variable working conditions marked

Need

Theory

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 of repose 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 based on 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 effective belt width b, and an equivalent angle of repose β determined, the equivalent angle of repose crosssectional sectional area determined determined by cross-secti cross-sectional onal area equal to the actual charge . Effective bandwidth of b depends on the bandwidth of B: B ≤ 2000mm b = 0.9 × B - 50mm (1) B> 2000mm b = B - 250mm (2)

DIN 2002

http://translate.googleusercontent.com/translate_c?hl=en&langpair=zh-CN... For a horizontal line running and roller group and stable operation of the inclined conveyor belt can reduce 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-off section of the theory of equivalent area A th, the angle β can be calculated with the cross-section area A 1th 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 not select select the equiva equivalen lent t angle angle of repose repose values values the experi experienc ence e can be substi substitut tuted ed into into the follow following ing formula: º;

For standard standard dispersed dispersed materials, materials, taking β = 20 for the second second diaspo diaspora ra or simila similar r materi materials als º º. dispersed, then take β = 20 the following to the β = 0 Only the transportation of materials with a high high coeffi coefficie cient nt of fricti friction on within within the case, case, the value of β can be greate greater r than than the equivalen equivalent t 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 cross section: 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 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

DIN 2002


(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 when the 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 6.1 General provisions

According to intensive with all types of conveyor and conveyor line and all of the current state of technology 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, providing the calculation described below. Easy for simple belt conveyor production conditions, and requirements of the belt is not very high values, considering the technical safety requirements under the conditions experienced in the application can reduce the calculation method used. Calculated running resistance at the beginning, you should estimate the base value. These parameters parameters should be verified in the calculation process, it may and should be corrected. Calculation should be repeated 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 and speed: P W = F W v (11)

To calculate, the running resistance is d ivided into: - Main resistance F H; - Additional resistance F N; 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 circumferential force F Tr:

(12) Sub-form of resistance should be de termined. A segment is marked by its substitution parameters, such as

DIN 2002


conveyor angle δ, the friction coefficient f and the imaginary transmission depends on the material m L, and the rotating rotating part of the segmented segmented roller roller load, there are upper and lower branches branches constant. Taking into account the use of EDV - device calculated in the conveyor section of the start and end of the nose from the direction of the tail began to establish a running index i (the loop variable) proved to be appropriate. Parameter values on the branch, with o, said that under the branch with u (see Figure 2). To be able 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 and Figure 5). 6.2 The main resistance 6.2.1 General

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

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 the next 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 much higher 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, and its far greater than the weight, less increase in resistance of conveyor. Focus is always on in the design of safety, should seek to run did not elaborate on the characteristics and values of the friction coefficient f large large interv intervals als calcul calculate ated d with with refere reference nce to Table Table 4. Inevitably Inevitably occur under certain

DIN 2002


conditions over a large parameter specifications. In order to reduce this value, for some segments, provides accurate friction coefficient f is necessary. Mainly Mainly throug through h the idler idler roller rollers s runnin running g resist resistanc ance e and the resist resistanc ance e to determ determine ine the fricti friction on coefficient f value. For relatively large degree of belt slack, delivery of materials a large proportion of the extrusion resistance. In orde order r to accu accura rate tely ly dete determ rmine ine the the fric fricti tion on coef coeffi fici cien ent t f, the the give given n boun bounda dary ry cond condit itio ions ns by determination 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 be both 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 p rediction coefficient q o. Table 3 Coefficients of the standard value q o

Special

Levy

Relative belt sag h rel

Special Levy Cheng Degree Points Class In Etc. High, ≤ Low

0.01 Transportation of materials within 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

Standard value of ≈ 0.7

Meter

The number of q o

Less Less

Operators Increase Add

Department The number of q o Of

0.5

To

0.85

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

DIN 2002


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

Special

Levy

Special Zheng degree classification

Transport of materials within the In Etc. friction Straightening of the belt In Etc. conveyor

Low

High

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: m

1.0 to 1.5

<1.0

> 1.5

The distance between rollers under the branch Unit: m

2.5 to 3.5

<2.5

> 3.5

4 to 6

<4

>6

25 to 35

<25

> 35

15 to 25

> 25

<15

Standard value of ≈ 0.020

Meter

Belt speed Groove angle

Unit: m / s Unit: °

Ambient temperature

Unit: ℃

Morocco Rub Department Number of f

Operators

Less Less Less Incr Increa ease se Add To the value of friction coefficient f

0.010

0.040

If the calculation is not very high accuracy requirements, according to the formula (13), the main drag in the calculation of the friction coefficient when the applied f. The drive for the generator generator operation mode, in the design to ensure ensure greater security, with a smaller smaller friction coefficient f; and the motor drive mode using the larger friction coefficient is f to achieve security. 6.3 Additional resistance 6.3.1 General

Additi Additiona onal l resist resistanc ance e is genera generated ted in the positi position on of indivi individua dual l convey conveyor or fricti friction on and inerti inertia. a. Additional parts of the resistance F N N can be calculated: 6.3.2 Determination of single additional resistance Feedin Feeding g at the transp transport ortati ation on of materi materials als within within the inerti inertial al resist resistanc ance e and belt belt and fricti friction on between:

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

DIN 2002


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 ≤v0≤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 Other types types of roller roller arrang arrangeme ement nt (eg, (eg, roller roller group group 5), calcul calculate ated d accord according ing to the follow following ing conditions: - A) range from feeding the volume throughput and transmission speed (v + v guidance in the trough side height; - B) Find the flow on the lead trough side pressure, in some cases with

c

0)

/ 2 find the materials and

Schb and c Rank;

- C) the average pressure from the side surface, the friction coefficient and the magnitude of the frictional 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 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 friction coefficient 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

DIN 2002


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 of conveyor 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 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 standard value of C

L, m 80

C

100 150 200 300 400 500 600 700 800 900 1000 1500 ≥ 2000 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 '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).

DIN 22101

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