First, the basis and significance of the topic selection

1. Belt conveyor is a kind of transportation equipment with belt as traction mechanism and bearing mechanism, which is widely used in ground and underground transportation. Compared with other equipment (such as locomotives), belt conveyor not only has the characteristics of long distance, large capacity and continuous transportation, but also has reliable operation, easy automation and centralized control, and obvious economic benefits. Its operation and maintenance cost is much lower than that of highway automobile transportation, and the total investment is small. Where belt conveyors can be used for transportation, continuous belt conveyors are used for transportation.

2. Belt conveyor is an ideal continuous transportation equipment, but at present, its efficiency has not been fully exerted and resources are wasted seriously. If the belt conveyor is properly reformed and certain safety measures are taken, the function of two-way transportation of people and goods can be realized, so that one machine can be used for multiple purposes and greater economic benefits can be brought into play.

Two. Raw data and working conditions

1, original data:

2. Working conditions:

Continuous unidirectional operation, slight vibration during work, service life 10 year, small batch production, single shift work (8 hours/day). The allowable error of transportation speed is 5%.

Three. Design content and research methods

1. Drafting of transmission scheme (designing single-stage cylindrical gear reducer and one-stage belt transmission)

2. Selection of motor

I) Y series three-phase asynchronous motor

3. Calculate the total transmission ratio and the distribution transmission ratio

4. Calculate the motion parameters and dynamic parameters.

5. Design of transmission parts

1) Design and calculation of pulley drive

1. Common V-belt

2. Determine the pulley diameter and belt speed.

3. Determine the belt length and center distance

4. Check the wrap angle of the small pulley

5. Determine the number of tapes

2) Design of gear transmission

3) Design and calculation of shaft

1. Estimate the shaft diameter according to the torque.

4) Selection and checking calculation of rolling bearing

1. Calculate the input orientation.

2. Calculate the output orientation

5) Selection of key connection

6) Selection of coupling

7) Selection of lubricating oil and lubrication mode

Four. Design task

1. Assembly drawing of a part (A 1)

2. Two working drawings of parts (A3)

3. A design paper (6000~8000 words)

Verb (abbreviation of verb) design process arrangement

1. Design preparation (2012.10.9 ~ 2012.10.20)

2. Overall design of transmission device (2012.10.21~ 2012.1.

3. Design of transmission parts (11.11~ 20)

4. Draw parts assembly drawing and working drawing (1 1.5438+0 ~ 30).

5. Write calculation instructions and graduation design papers (11.1~12.10).

6. Revise and complete the paper (12. 10~ 17)

7. Prepare your defense (12. 18~30)

Reference of intransitive verbs

1. concise mechanical design manual, beijing institute of technology press, 2008.

2. Mechanical Curriculum Design, Song Baoyu, Wu, Higher Education Press, 2009

3. Mechanical Design, Pu, Ji Minggang, Higher Education Press, 2009

4. Mechanical Drawing, Song Zhiliang, Huang, beijing institute of technology press, 2009.

5. Engineering Materials, Su, Xiangtan University Press, 2008

6. Atlas of Mechanical Design Curriculum Design, Chen Tieming, Higher Education Press, 2009

7. Fundamentals of Mechanical Design, Chen Lide, Higher Education Press, 3rd Edition, August 2007.

8. Mechanical Principles, Chen Zuomo, Ge, Higher Education Press, 2006.

9. Mechanics of Materials, Wu Jianhua, Chongqing University Press, 2002.

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