Impact of Ultrasonic Exposure on Soil Adhesion to Working Bodies of Earth-Moving Machines

Abstract

- When the moist cohesive soil is excavated, the soil sticking and freezing to the working units of the earth-moving machines take place, which considerably reduces their efficiency. There are four main groups of methods intended for eliminating adhesion of soil to the surface of the working bodies of earth-moving machines. As for the nature and the operating principles of the methods, they can be divided into the preventive methods and the means for cleaning working units of earth-moving machines. PM3-4/18 (ПМ3-4/18) magnetostriction transducer was used in the experiment as a source of ultrasonic oscillations. Ultrasonic exposure belongs to a group of combined methods of eliminating adhesion. In order to evaluate efficiency of ultrasonic exposure the experiments were carried out on shear bench. Environment temperature range for the experiments was limited from -25 to +15 °С. Ultrasonic exposure allows reducing soil adhesion to working bodies of earth-moving machines due to thermal and vibrational impact on contact surface.