Design of trailed scraper based on D-697

Contents

Maintaining

1 Performance characteristics of the designed machine

2 Characteristics of the trench under development

3 Selection of main geometric parameters of ladle

4 Traction calculation

5 Power calculation

6 Calculation of stapler capacity

7 Stability calculation

7.1 Calculation for longitudinal stability

7.2 Calculation for transverse stability

8 Selection of hydraulic motor for ladle unloading mechanism

8.1 Determination of force acting on the rod of ladle unloading mechanism hydraulic cylinder

8.2 Selection of hydraulic cylinder for ladle unloading mechanism..... 20 Conclusion..... 23 Literature

Summary

The course project in the discipline "Construction and Road Machines" on the topic "Design of a trailed stapler" contains:

- operating characteristics of the designed machine

- characteristics of the trench under development

- selection of basic geometric parameters of ladle

- calculation of drives

- calculation of stapler capacity

- traction calculation

- power calculation

- stability calculation

Estimated Explanatory Note:

- pages 24

- Figures 5

- bibliographic list

Graphic part:

- sheet A1 1

- sheet A2 1

Introduction

Machines for construction work are widely used in industrial and civil construction, in agriculture, mining, as well as in the extraction of raw materials for the construction materials industry.

Earth-moving machines develop loose and coherent soils, as well as loose and immerse frozen and rock soils

The scraper is a cyclical earth-moving machine designed for layer-by-layer cutting of soil, transportation of it to the place of laying and unloading to the structure or to the dump. Rational range of longitudinal movement of soil for trailed scrapers up to 700 m and for self-propelled - up to 2 km [9].

Staplers are used in earthworks for the construction of embankments, the arrangement of excavations, and the layout of large areas.

The scraper is a ladle with a front cutting edge fixed on a frame with a pneumatic wheel stroke. The brace bar is connected to a caterpillar tractor or a pneumatic wheeled tractor.

When the ladle is lowered, the leading cutting edge crashes into the ground. During movement, the scraper continuously cuts a layer of soil. The filled ladle is closed by the front flap .

Conclusion

In this course design, a scraper with a bucket capacity of 5 m3 was designed and the following calculations were made based on the available data:

- characteristics of the developed trench;

- selection of basic geometric parameters of ladle;

- traction calculation;

- power calculation;

- performance calculation;

- stability calculation;

- selection of hydraulic motor for ladle unloading mechanism.