In all mechanical machinery there is mechanical movement of machine parts. People need energy to create that movements. One of the most common forms of energy today is electricity. In the history of invention, people have found that the electric motor is the most optimal, it has a much greater efficiency than the other type of motor. In industrial production to improve productivity and economic efficiency as well as feasibility, electric motors are manufactured with power and rotational speed as a specific value established in standard tables. Meanwhile, mechanical machines need arbitrary power without any standard. Therefore, electric motors cannot transmit power directly to moving systems, but must go through a conversion device, which is a reducer. The gear box is a directcoupled, constantratio transmission device used to reduce angular velocity and increase torque. Thus, it is seen that a moving machinery system needs to have components such as: Motor, transmission, reducer and load system. Such a system is called a mechanical drive system. Conveyor belt drive system is a system widely used in factories, enterprises, construction sites, etc., characterized by high conveying capacity, diversified transportation types. Bulk materials or finished articles can be transported, to meet each production lines requirements in terms of distribution form and transport technology requirements. Depending on the production conditions to decide to use a conveyor or a combination of multiple conveyors with other conveyor equipment to realize continuity and automation in production, improve productivity and reduce labor intensity. The investment cost of manufacturing conveyor belts is not very large on the basis of simple structure and does not use too many expensive specialized materials. Compared with other transport equipment used in the mining industry, the cost per tonkm is much cheaper than that of cars and other means of transport except for railways. Conveyor belt is a continuous transport device, working thanks to the frictional force between the belt surface and the drum, a conveyor driving station is usually composed of three main parts: Motor transmission and torque, gear box and conveyor.
HO CHI MINH CITY NATIONAL UNIVERSITY HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY MECHANICAL DEPARTMENT -o0o - CAPSTONE PROJECT RESEARCH AND DESIGN OF MATERIAL SUPPLIES FOR CONSTRUCTION MIXING PLANT Ho Chi Minh City, September 14th, 2023 HCMC UNIVERSITY OF TECHNOLOGY ENGINEERING FACULTY CỘNG HÒA XÃ HỘI CHỦ NGHĨA VIỆT NAM Độc Lập – Tự Do – Hạnh Phúc No: /ĐHBKDeparment: MACHINE DESIGN CAPSTONE PROJECT GOALS FULL NAME: NGUYỄN NHẬT TIẾN STUDENT ID 1953020 MAJOR: Mechanical engineering (OISP) CLASS: CC19CK12 Title of thesis: DESIGN OF GARBAGE COLLECTOR ON THE BEACH (Thiết Kế Máy Gom Rác Bờ Biển) Objectives: Learn about the process of garbage collection on the sandy shore and the solar energy system Suggest and choose the optimal method for machine design Doing calculations to design mechanism of waste collection and remove unwanted materials from beach Doing calculations to design the solar energy system Making suggestions, and notes for operation – repair – maintenance process Estimated drawings: 07, include: + drawing A0, about: General drawing + drawing A0, about: Drawing of options diagram + drawing A0, about: Drawing of principle and kinematic diagram + drawing A0, about: Assembly drawing of vibrating screener + drawing A0, about: Assembly drawing of screening frame + drawing A0, about: Assembly drawing of pulling unit + drawing A0, about: Drawing of motor starter cuircuit Date of making assignment: 30 / 01 / 2023 Date of finishing assignment: 12 / 05 / 2023 Full name of instructor: Thân Trọng Khánh Đạt Guidelines contents: 100% Contents and requirements of CP are approved by Department 30th January, 2023 VICE - PRESIDENT MAIN INSTRUCTOR (Sign and write full name) (Sign and write full name) Bùi Trọng Hiếu Thân Trọng Khánh Đạt PART FOR FACULTY, DEPARTMENT PREFACE Our country is on the path of industrialization and modernization, following the socialist orientation in which industry plays a very important role Machine systems are becoming more popular and gradually replacing human labor As a student in the Mechanical Engineering Department, I can realize the importance of the knowledge that I have received from my teachers I would like to sincerely thank the assistance of lecturers in the department of mechanical engineering, and especially thanks to the instruction of Mr Nguyen Hai Dang, who accepted to instruct and helped me a lot in this stage Throughout the process of learning, all of the advice I have received has not just helped me improve and advance my specialist knowledge but also provided opportunities for me to think and accumulate experiences for my future job In addition, I would like to thank all of the lecturers at Ho Chi Minh City University of Technology who are ready to impart knowledge and support me throughout the whole period I have studied here Moreover, I also want to send special thanks to my family and my friends, especially my father, my brother Nguyen Minh Long, who are always side by side to support me and even motivate me to overcome the difficulties These motivations pushed me and made me try harder to finish the thesis Honestly, I cannot complete my project without these motivations Finally, I wish all of the teachers good health and that they will always be the pioneers who guide the next generations on the path of study and research at this university Once again, thank you very much! Ho Chi Minh city, 12/05/2023 Student: Nguyễn Nhật Tiến TABLE OF CONTENTS PREFACE CONTENTS LIST OF FIGURES LIST OF TABLES Chapter I INTRODUCTION TO BELT CONVEYOR 1.1 Introduction of conveyor drive system in concrete batching plant 1.2 Components of concrete 1.2.1 Cement 1.2.2 Sand 1.2.3 Crushed stone 1.2.4 Water 1.2.5 Additives 1.2.6 Example of concrete mix ratio Chapter II OVERVIEW ABOUT TECHNOLOGY SOLUTIONS .10 2.1 Methods of transporting bulk materials .10 2.1.1 Conveyor 11 2.1.2 Bucket Loading 11 2.1.3 Screw conveyor 13 2.2 General structure of the conveyor system 16 2.3 Material quantification method 16 2.3.1 Loadcell weighing system 11 2.3.2 Working principle 11 2.3.3 The method to install the sensor into the system 11 Chapter III BELT CONVEYOR DESIGN PROCESS 18 3.1 Design goals 19 3.1.1 Determine the minimum width (B) of the conveyor 19 3.1.2 Determine the height of the conveyor 19 3.1.3 Determine the speed of the conveyor 19 3.1.4 Calculation of conveyor transmission power 21 3.1.5 Determine the height of the conveyor 23 3.1.6 Conveyor belt tension .23 3.1.7 Calculation of ribbon selection .25 3.1.8 Conveyor system structure 25 3.1.9 Calculation of the tensioning mechanism 27 3.2 Electric motor selection .32 3.2.1 Select engine type 32 3.2.2 Select engine power 32 3.2.3 Select number of synchronous revolutions of the motor 33 3.2.4 Calculate shaft parameters and choose motor 34 3.3 Calculate and design roller chain transmission 35 3.3.1 Select chain type 35 3.3.2 Determination of chain transmission parameter 35 3.3.3 Check the roller chain durability 35 3.3.4 Determination of sprocket parameters 35 Chapter IV TESTING STRESS AND ROLLER MACHINING PROCESS 39 4.1 Pulley axis 39 4.1.1 Choose material for the shaft 39 4.1.2 Shaft preliminary calculation .39 4.1.3 Approximate value on shaft and moment calculation 40 4.1.4 Shaft test for fatigue strength .44 4.1.5 Shaft test for static strength 50 4.2 Carrier ……………… 51 roller shaft…………… ……………… 4.2.1 Calculate the force acting between rows of rollers 39 4.2.2 Shaft preliminary calculation .39 4.2.3 Approximate value on shaft and moment calculation 39 4.2.4 Shaft test for static strength 39 4.3 Technological ……………… 51 process of roller ……………… Chapter V … ………………………………………………………………………… OPERATE AND MAINTENANCE THE MACHINE .39 5.1 Install the machine 39 5.2 Operate the machine 39 5.3 Maintenance the machine 39 Chapter VI …………………………………………………………………………… CONCLUSION AND FUTURE DEVELOPMENTS……………………………… 39 6.1 Conclusion 39 6.2 Remaining problems 39 6.3 Future developments 39 Reference 53 LIST OF FIGURES Figure 1.1 Belt conveyor for transporting aggregates .8 Figure 2.1 Belt conveyor 10 Figure 2.2 Bucket construction structure 11 Figure 2.3 Horizontal screw conveyor 11 Figure 2.4 Supporting structure of a Belt conveyor system 15 Figure 2.5 Conveyor idler with trough angle 18 Figure 2.6 Flat rollers and chute rollers 20 Figure 2.7 Surcharge angle 22 Figure 2.8 Screw type take-up system 25 Figure 2.9 Vertical gravity type take-up system 27 Figure 2.10 Horizontal gravity type take-up system .30 Figure 2.11 Power system type take-up system 31 Figure 2.12 Load cell weighing system 32 Figure 2.13 General structure of electronic weighing device 34 Figure 2.14 Working description of load cell .35 Figure 2.15 Simulation of installation of load cells 36 Figure 3.1 Actual slope angle of conveyor 37 Figure 3.2 Cross section of conveyor belt .38 Figure 3.3 The force components on the conveyor .41 Figure 3.4 Illustration of different types of pulleys 46 Figure 3.5 Classification of pulley with specific range of application 48 Figure 3.6 Cylindrical pulley texture 53 Figure 3.7 Transition distance b between the last roller and the pulley 55 Figure 3.8 Diagram of force acting on the tensioning mechanism 58 Figure 3.9 Working load diagram 59 Figure 3.10 GM-D/DP Series Three-phase Motor 66 Figure 3.11 GM-D/DP Series Motor Catalogue 75 Figure 3.12 Technical drawing of chosen motor 76 Figure 4.1 Torque diagram and structure of the guide shaft 80 Figure 4.2 Key joint 82 Figure 4.3 SKF Spherical roller bearing with lubrication features .85 LIST OF TABLES Table 1.1 Mixing concrete grade and ratio of materials Table 3.1 Belt conveyor initial data 10 Table 3.2 Coefficient by Angle of Incline 11 Table 3.3 Density of material .13 Table 3.4 Angle of Incline of Belt conveyor with materials 15 Table 3.5 Coefficient of Sectional Area “K” 18 Table 3.6 Maximum Belt speed (in unit: m/min) 20 Table 3.7 Friction Coefficient of Idlers “f” and adjusted horizontal length “l0” 22 Table 3.8 Multi-ply Fabric belt Safety factor values “SFz” 25 Table 3.9 Pulley Diameter corresponding to groups .27 Table 3.10 Pulley Factor “K” with Fabric type .30 Table 3.11 Minimum pulley diameter for Nylon fabric Belt 30 Table 3.12 Chain drive parameters .30 Table 4.1 Dimensions of the keyway and keyway section (TCVN 4214-86) .30