Required power calculation to small rotor tip drive

Abstract

Introduction. The problem of accelerating and reducing the cost of road construction without reducing their quality can be solved by creating a complex of continuous units. The units, following each other, carry out the whole range of works aimed at the construction of roads. One of the elements of the continuous unit that forms the cuvette is a direct-flow rotary ripper. It was revealed that for excavation near the axis of rotation of the rotor of a direct-flow rotary ripper, a small rotor with a higher angular velocity coaxially with a large rotor should be installed. The small rotor contains of a small rotor tip with spiral knives, two teeth and two knives. Previously, the structural layout of the small rotor was determined, the height of the spiral of the spiral knife was calculated. By analyzing the interaction of the elements of the working bodies of the direct-flow rotary ripper with the soil, it is necessary to identify the power on the drive of the tip of the small rotor.The method of research. The calculation methods of power for the introduction of a cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground, power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife have been developed.Results. On the basis of the developed methods, the parameters were calculated. From the spatial models of the forces of interaction with the soil of the spiral knife, their resultant, normal forces, the forces of resistance of the soil to the rotation of the spiral knife are revealed, the friction forces of the soil on the rear surfaces of the first and second turns of the spiral knife are calculated. The total power for the drive of the tip of the small rotor and the volumetric energy for the introduction of a cone with a spiral knife into the ground are calculated.Conclusion. The total power for the drive of the tip of the small rotor includes power for the introduction of the cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground; power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife. The required power to drive the tip of the small rotor is 1127 W. The volumetric energy for the introduction of a cone with a spiral knife into the ground is 16.9 kJ / cubic meter.