Modernization of FBN-1,5 tillage milling machine

Contents

Introduction

1 Description of the designed design

2 Selection and substantiation of mill working elements parameters

2.1 Calculation of Milling Drum Radius

2.2 Calculation of knives parameters

2.3 Calculation of dependence of power required for soil milling on tillage depth and its properties

2.4 Calculation of tractor power balance and its utilization factor

3 Calculations

3.1 Calculation of forces acting on the milling cutter

3.2 Strength calculation of L-shaped knife

3.3 Mill Drum Shaft Strength Calculation

3.4 Calculation of friction safety device

4 Adjustment and lubrication of the article

Conclusion

Task

1 Topic of the course project Forest milling tillage machine

2 Design Input:

purpose - soil preparation in drained marshes

grip width - 1.8 m;

processing depth - 0.1... 0.3 m;

RPM of the milling drum shaft 280 rpm;

the brand of the aggregated tractor is T130M.

3 List of drawings:

Kinematic diagram of the unit

Mill Drum Assembly Drawing

Drawing of L-shaped knife

Mill Drum Shaft Drawing

Introduction

In the process of reconstruction of floodplain forests, the quality of soil cultivation is important.

Milling tillage machines are significantly superior to ploughs according to this indicator. Swamp cutters of the FBN1.5 type allow for 1-2 passes to qualitatively prepare soil on a nomadic floodplain meadow. However, such tools have a number of drawbacks: first of all, it is a high energy capacity and relatively low work productivity.

In the course project, the tasks of modernizing the FBN1.5 cutter are solved in order to increase the productivity and quality of soil treatment.

During the structural and operational analysis, the design features and parameters of modern tillage machines were studied. As a result, it was decided to increase the grip width and processing depth, calculations were made of the power required to drive the modernized milling cutter, which confirm the possibility of its operation in the unit with the T130 tractor.

A patent search was carried out as a result of which 20 patents were selected. As a result of the analysis of the selected patent documents, it was decided to use one of them. The patent proposes a novel construction of an L-shaped knife, which is characterized in that each knife is provided with two kinds of ripping elements arranged on the radial section and the wing, the first of which is made in the form of protrusions expanding from the blade, and the second - in the form of a plate located at an angle to the plane of rotation of the wing (this ensures uniform loosening, which significantly improves the quality of surface treatment). Also, the working surfaces of the ripping elements are fused with a hard alloy in the form of separate belts (this leads to an increase in the service life of the working element).

Conclusion

The diploma project solved the tasks of modernizing the MFN1.5 cutter in order to increase the productivity and quality of soil treatment.

During the structural and operational analysis, the design features and parameters of modern tillage machines were studied. As a result, it was decided to increase the grip width and processing depth, calculations were made of the power required to drive the modernized milling cutter, which confirm the possibility of its operation in the unit with the T130 tractor.

A patent search was carried out as a result of which 20 patents were selected. As a result of the analysis of the selected patent documents, it was decided to use one of them. The patent proposes a novel construction of an L-shaped knife, which is characterized in that each knife is provided with two kinds of ripping elements arranged on the radial section and the wing, the first of which is made in the form of protrusions expanding from the blade, and the second - in the form of a plate located at an angle to the plane of rotation of the wing (this ensures uniform loosening, which significantly improves the quality of surface treatment). Also, the working surfaces of the ripping elements are fused with a hard alloy in the form of separate belts (this leads to an increase in the service life of the working element).