ОБОСНОВАНИЕ ПАРАМЕТРОВ ШНЕКОВЫХ РАБОЧИХ ОРГАНОВ ЛЕСОПОЖАРНЫХ ГРУНТОМЕТАТЕЛЬНЫХ МАШИН

Abstract

The paper provides an overview of the research of the working processes of the screw working bodies of technological machines. It is shown that at present such an issue in the theory of auger working bodies as the number of auger turns is necessary, what position of the auger spiral should be in relation to the center, etc. is not completely solved, the solution of these issues can provide increased productivity. In modern conditions, caused by global climatic changes in the world, the requirements for the conditions for the protection of forest zones have increased, which makes it necessary to increase funds for fighting fire in forests and increase the raw material and financial base of specialized forest protection services, which is due to the constant search for new and improvement of old methods of forest fire elimination. Special ground-throwing machines have the greatest efficiency, but they do not have working equipment for pushing combustible materials in the form of a ground cover, dead wood, and felling residues. For these purposes, in our opinion, the most suitable auger working bodies installed in front of the rotor-throwers. Modeling of the working process of screw working bodies is based on the particle dynamics method. In the process of modeling, the forest litter is made in the form of a set (about 5000) spherical elements in diameter, which interact with each other and with the working surfaces of the auger working bodies. The working surfaces of the screw drum are represented from the lateral surface of the cylinder, modeled as a separate geometric figure, and 200 triangles forming a helical surface. It was found that the optimal cutting depth is 8-10 cm, at which the auger almost completely cleans the working strip from the soil layer, but at the same time is not too deeply buried to cause large power losses. The identified main parameters of the auger working bodies will be used to create an effective forest fire ground-throwing machine.