Determination of the critical depth of semi-blocked soil destruction with a straight cutter

Abstract

Problem. This scientific article is devoted to the method of determining the critical depth of soil destruction for the conditions of semi-blocked and semi-blocked asymmetric cutting (with a retaining wall on one side of the cutter) is considered. Goal. The purpose of this work is to create a method for determining the critical depth of soil cutting with a straight knife in the conditions of semi-blocked asymmetric cutting and to establish the regularities of the influence of the geometric parameters of the cutter and the physical and mechanical properties of the soil on it. Methodology. In the course of the study, the method of analytical calculation of parameters was used. Results. The calculations carried out in the paper show that when the cutting angle of the knife is reduced from 50° to 20°, the relative chipping depth increases. For soils with similar physical and mechanical properties, but with different moisture content, the relative depth decreases with increasing moisture content. Such a dependence is also characteristic of increasing soil adhesion coefficients. With unchanged knife parameters , the relative shear depth for different soils varies in the upper tier is: for semi-blocked cutting from 4.73 to 7.32, for semi-blocked asymmetric - from 5.77 to 10.69. Thus, the geometric parameters of the soil development working body have a more significant effect on the relative depth of the shift than the physical and mechanical parameters of the soil. Practical value. The proposed technique allows for the design of new earthmoving equipment to increase its energy efficiency due to the introduction of critical-depth semi-blocked soil cutting.