Rotary Tiller Blade Analysis

Tillage is an operation performed on the field to obtain a desirable soil structure for perfect seedbed preparation for sowing seeds. Rotavator or Rotary tiller is a tillage machine Manufactured for preparing land by breaking the soil with the help of rotating blades. The development of Rotavator blades is an on‐going process. The Rotary Tiller’s Blade is geometrically constrained with preparation of solid model in CAD-Software and the Analysis is done with actual field performance rating parameters by using CAD-Analysis software for the structural analysis. The energy constrained for the tillage tool operations with 37Hp and 45Hp power tractor and estimated forces acting at soil-tool interface. The resultant effect on Rotary Tiller’s Blade

The direction of rotation affects the manner because of its design in which soil failure occurs during the rotary tillage operation. Increase in fossil fuel prices leads to higher level of Agricultural land preparation cost which directly leads to increase in the cost of food. Farmers are more interested to improve cost to benefit ratio by reduce the land preparation cost and increase the yield. Now a day it is possible by using Rotary tiller or Rotavator for seedbed preparation. In a Rotavator Blades are the main parts which are engaged with soil to prepare the seedbed for sowing. Rotavator is a widely used machine for tillage operation in Indian farming because of its superior ability to mix, flatten and pulverize soil. This paper describes the design analysis of blade through computational

Investigated the performance characteristics of three types of blades, viz, ‘C’, ‘J’ and ‘L’ shaped blades in terms of power requirements and the puddling quality of a tractor‐driven Rotavator in a wet clay soil. L-shaped blades are mostly used in Rotary Tillers manufactured in Indian because of its effectiveness over ‘C’ type and ‘J’ type blades. These blades are normally mounted with three right handed and three left handed blades per flange.

Table 1: Blade Parameters

Sr. Parameters Values

1 Blade span (mm) 40

2 Effective Vertical length (mm) 231

3 Blade cutting width (mm) 135

4 Blade thickness (mm) 9

Methodology

From literature it is clear that a “L” type blade is most suitable for Indian farming conditions compared to ‘C’ and ‘J’ type Blade, a blade was designed in 3D CAD software on the basis of geometrical parameters of actual ‘L’ type blade, followed by analysis in ANSYS.

The steps performed in ANSYS for analysis are import design, meshing, input parameters and solution. The structural analysis was done based on field trial data available from the manufacturer and farmers.

Table 2: Input Parameters for the Analysis Sr. Parameters Values

1 Rotary tiller work depth (mm) 220

2 Rotary tiller work width (mm) 1500

3 Rotor rpm 210

4 Blade peripheral velocity (m/s) 5

5 Total number of blade 36

6 Number of blades on each side of the flanges