Upgrade of mounted bulldozer equipment

Contents

INTRODUCTION

1 Analysis of patent solutions

2 Technical Proposal

3 Technical characteristics of the machine

4 General information

5 Traction calculation and determination of bulldozer efficiency indicators

6 Static calculation of bulldozer.... 16 7 Determination of rated pressure in hydraulic system

8 Determination of horizontal component of soil resistance to digging by bulldozer equipment

9 Determination of the digging force, considering the shape of the knife

10 Strength calculation of the average protruding knife and box for strength

Conclusion

LIST OF SOURCES USED

Appendix A

Introduction

The bulldozer - the self-propelled digging machine which is the caterpillar or wheel tractor, the tractor, etc. with hinged working body - the curvilinear dump in section located out of base of a running gear of the car. It is used for layer-by-layer digging, planning and movement (at a distance of 60300 m) of soils, minerals, road construction and other materials during the construction and repair of roads, canals, hydraulic structures, etc. Also, the bulldozer is used in the development of placers, on dumps, during reclamation, as an auxiliary machine in quarries. In addition, the bulldozer is used in the construction and repair of roads, as well as as a pusher.

The main working equipment of the bulldozer is a dump. Today, there are a large number of different modifications that have a complex design and provide narrowly specialized soil development.

However, during the development of solid soils, along the entire length of the cutting edge of the dump, the resistance of the soil to cutting acts, which leads to large energy costs. Solving this problem is the purpose of this course project.

Technical characteristics

Tractor tractor T-180

Rated engine power, kW 128.8

Crankshaft speed at rated power, rpm 1100

Cylinder diameter, mm 145

Piston stroke, mm 205

Working volume of cylinders, l 20.28

Compression ratio 14

Fuel tank capacity, l 325

Base, mm 3220

Gauge, mm 2040

Ground clearance, mm 55

Turning radius, m 2.04

Track width of caterpillar, mm 580

Height of soils, mm 75

Specific pressure on soil, MPa

Solid 0.05

Soft 0.03

Conclusion

Bulldozer equipment with VSN was designed and calculated during this project. Also during the work, the following issues are considered and resolved:

analysis of scientific works made in this field (patent search);

review and analysis of existing structures;

modernization of the bulldozer RO;

Efficiency of design changes of parameters of new dump, which has protruding middle knife, is proved.