On the basis of referring to the design method of conventional downward belt conveyor, this paper analyzes the advantages and disadvantages of common driving modes and braking modes of long-distance and large-capacity downward belt conveyor, and puts forward the driving and braking modes that can be adopted by this conveyor. This paper analyzes the commonly used soft start devices and their selection methods, summarizes the key problems in the design of long-distance, large-capacity and variable-slope downward belt conveyor, and the feasible scheme of the optimal combination of reliable driving scheme and braking mode. Through conventional design and calculation, the method of reasonably determining the tension position, tension mode and tension force is put forward. Select and check the drive and main components.

The long-distance belt conveyor with variable slope has complex operating conditions, so it is necessary to consider all possible operating conditions and calculate all the parameters of the conveyor under the most dangerous operating conditions in the design. At the same time, in order to ensure that all parts of the conveyor can adapt to the changes of load and working conditions during operation, it is necessary to unify the tension, then recalculate the conveyor parameters under various working conditions, and finally determine the overall parameters.

In this paper, the long-distance and large-capacity variable slope belt conveyor is considered comprehensively, and the reasonable combination of driving scheme, braking mode and soft start device is adopted to effectively ensure the reliable operation of the long-distance and large-capacity variable slope belt conveyor.

Keywords: belt conveyor downward long-distance slope change

catalogue

1 Introduction to ............................................................................................................... 1

2. The development and present situation of conveyor

2. 1 Development and present situation of belt conveyors at home and abroad

2. 1. 1 Present situation and development trend of belt conveyor technology in foreign coal mines

2. 1.2 Technical Status and Existing Problems of Belt Conveyors for Coal Mines in China

2. 1.3 Development of Belt Conveyors for Coal Mines in China

2.2 Project background

2.2. 1 main technical parameters

2.2.2 Line parameters

2.2.3 Material characteristics

2.2.4 Working environment of belt conveyor

2.3 the research content of this topic

2.3. 1 analysis and research on key technologies of long-distance and large-capacity downward belt conveyor in ...................................................................................................................................... 6

2.3.2 belt conveyor design and analysis of driving and braking scheme

3 key technology analysis of long-distance and large-capacity downward belt conveyor 7 pages

3. 1 Download the basic composition of belt conveyor

3.2 Determination of driving scheme

3.3 Braking Technology of Belt Conveyor

4 Design of long-distance and large-capacity downward belt conveyor .............................................. 1 1

4. 1 Original parameters of belt conveyor ................................... 1 1

4.2 Design and Calculation of Belt Conveyor ................................................. 1 1

4.2. 1 Selection of conveyor belt running speed ..................................... 1 1

4.2.2 Calculation of conveyor belt width .................................................... 12

4.2.3 Main conveyor belt ................................................... 12

4.3 Determination of conveyor layout and basic parameters .....................................................................................................................................................................

4.3. 1 conveyor belt layout ................................................. 13

4.3.2 Determination of basic parameters of conveyor ........................................... 13

4.4 Calculation of line resistance 14

4.5 Calculation of Belt Tension 15

4.5. 1 Discussion on various operating conditions in tension calculation .................................... 16

4.5.2 Tension calculation under maximum power generation state ....................................................................................................................................................................

4.5.3 Calculation of tension under maximum electrical state .....................................................................................................................................................................

4.5.4 Calculation of tension under full load

4.5.5 Comprehensive analysis and tension calculation of three working conditions 2 1.

4.5.6 Selection of the number and proportion of motors

4.6 Selection of Drum and Reducer

4.6. 1 Selection of driving drum diameter 24

4.6.2 Selection of diameter of reversing drum

4.6.3 Selection of reducer

4.7 Selection of braking device

4.7. 1 Principle and performance of main braking devices at present

4.7.2 Selection principle of brake

4.7.3 Selection of brakes

4.8 Selection of soft start device

4.8. 1 Principle and performance of main soft start devices at present ..........................................................................................................................................................

4.8.2 Selection of soft start device 0.

4.9 tensioner 3 1.

4.9. 1 Determination of tensioning position

4.9.2 Calculation of Tension and Tension Formation

4.9.3 Selection of tensioning device

5 conclusion

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