Vibro-driven drying unit for 10 t abzas

Contents

Contents

Introduction

1 Analysis of patent and technical information

Technical Information Analysis

Patent Review

Justification of design design selection

Description of the designed structure

2 Calculation of basic parameters

2.1 Calculation of engine power

3 Strength calculation

3.1 Spring strength calculation

3.2 Pin Strength Calculation

4 Process Part

5 Automation of ABZ

Conclusion

List of used literature

Appendix A

Appendix B

Appendix B

Introduction

Construction production belongs to one of the oldest branches of human activity. It stood at a fairly high level long before our era. Examples of building art such as Egyptian pyramids, earthen dams in India and landscaped roads of the Roman Empire are widely known. So, the total length of the latter by the beginning of our era was about 78,000 km. Construction and road work was carried out manually. Currently, construction production is unthinkable without its mechanization, that is, without the use of special machines. The huge scale of construction led to an increase in the production of such machines. There is a tendency to increase the capacity of machines and to automate the production processes associated with their work. Even more powerful engines, tractors and tractors are planned for production, which will allow to obtain more powerful road and construction machines, and therefore increase their productivity.

Construction machines and equipment for mechanization of construction can increase labor productivity tens, hundreds and thousands of times compared to productivity in manual work, reduce time and reduce the cost of construction many times.

Analysis of scientific and technical information. Patent Review

1.1 Analysis of scientific and technical information

In the modern production of building materials, in particular the production of asphalt concrete, there is a problem associated with high energy costs, the quality of drying the material in drying units.

1.2 Patent Overview

During the patent analysis, alternative solutions were found to the problem of the effectiveness of drying construction and road materials .

1.3 Justification of design design selection

The disadvantages discussed in paragraph 1.2 of the invention are that although they are intended to improve the drying efficiency of the building material, they cannot achieve the desired result at a rather high level. The intensification of the process of grinding the resulting lumps of material does not allow us to break the lumps into smaller fractions and better get rid of the sticking of working elements (chains, blades, etc.).

For a higher level of drying efficiency of building material, I propose to use a drying unit with a vibration drive, which is equipped with a working element in the form of modules with springs, installed in turn with an increase in the static gap in the springs.

1.4 Description of the designed structure

In this course design, a drying unit is proposed that allows increasing the drying efficiency of road-building material. Drying unit with vibration drive is based on screen analogue with screening surface made in the form of elastic elements, which make additional oscillations in direction perpendicular to material movement. These vibrations make it possible to improve the passage of the material through the sieving surface, as a result of the variability of the sieving holes, the size of the fractions of the dried material changes. Working member is represented by cylindrical spring. The raw material is loaded onto the inner surface of the spring through the end inlet. Working member, being load-carrying member makes oscillatory movements in vertical plane with constant amplitude of oscillations.

To obtain material of several fractions, it is possible to use a spring with a variable winding pitch, a set of several serially located springs with different winding pitch, use an axial, cascade or combined arrangement of working elements. We will screen according to a cascade scheme - the division into a large and small fraction is carried out with the removal of a large, and then fractions by increasing the size of the material. Thereby providing a more efficient drying of the building material.

Strength calculation

The most loaded elements of the structure are pin-serving as a fastening element between the casing of the drying unit and the working module. And also a spring entering the vibration drive.

Conclusion

In this course project, a drying unit was proposed to increase the efficiency of drying road construction material. Drying unit with vibration drive is based on screen analogue with screening surface made in the form of elastic elements, which make additional oscillations in direction perpendicular to material movement. These vibrations make it possible to improve the passage of the material through the sieving surface, as a result of the variability of the sieving holes, the size of the fractions of the dried material changes. Working member is represented by cylindrical spring. The raw material is loaded onto the inner surface of the spring through the end inlet. Working member, being load-carrying member makes oscillatory movements in vertical plane with constant amplitude of oscillations.

To obtain material of several fractions, it is possible to use a spring with a variable winding pitch, a set of several serially located springs with different winding pitch, to use an axial, cascade or combined arrangement of working elements. We will screen according to a cascade scheme - the division into large and small fractions is carried out with the removal of large, and then fractions by increasing the size of the material