Study on optimum parameters for the rotary tiller design
1994
Somyot Thampatpong
In order to decide optimum parameters for the design of rotary tiller a study was conducted in a soil bin with clay soil at moisture content of 23.26 percent (db) and dry bulk density of 1.29 g/cubic cm. The power requirement to cut and throw the soil was found to be affected by the rotor speed, the forward travel speed and the tilling depth. The power required increased with an increasing of the rotor speed, the forward speed and the tilling depth. These three parameters also affected the soil breakage. The bigger clods size were found when the tilling depth and the forward speed were high and the rotor speed was low. The smaller clods size were occurred when the tilling depth and the forward speed were low and the rotor speed was high. The optimum parameters for the design of rotary tiller were found to be 18 cm depth of the tilling, forward speed of 0.35 m/s and rotor speed of 165 to 220 rpm which will take power requirement of 2.70 to 3.50 kW. At this condition of rotary tiller working the clod size developed will be the one recommended for soybean cultivation.
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