Symmetrical multi-spiral arrangement of tillage blades on rotor

In order to make the universal blade meet the requirements of ridge stubble-breaking or full-width rot tilling, reduce the power consumption and make the forces acting on the rotor more evenly, a symmetrical multi-spiral arrangement method for the tillage blade on the horizontal rotor was presented. The blade rotor was divided into two equal rotors, a right rotor and a left one, on which the blades were arranged in a multi-spiral way. The spirals on the two rotors were in opposite directions, but the lift angle of the spiral on two rotors were the same. The blades on the same spiral were in the same bending direction, and those arranged on adjacent spirals were in the opposite bending direction. The bending direction of the blades on the blade disc of the right rotor was opposite to that in the corresponding position on the symmetrical blade disc of the left rotor. Test results of several different rotary tillage machines adopting the arrangement method in rot tilling and stubble-breaking operations showed that the average soil-breaking rate was higher than 85.6% and the average stubble-breaking rate higher than 80%. The use of the arrangement method in the rotary tillage machines can reduce shock and vibration, prolong the service life of the transmission part and increase the operating stability of the machines.