Results of experimental research of conical rotary loosener in soil canal

Abstract

The article presents the results of experimental research of a conical rotary loosener for deep soil tillage. The loosener is a screw rotary conical tool mounted on a rack, with the possibility of rotation around its own axis from the reaction of the soil. Experimental research to assess the traction resistance of the loosener and to determine the dependency of the number of its revolutions per 1 meter of the traveled distance on the design parameters and the speed of movement were carried out in the soil canal of the Kazan State Agrarian University in accordance with the developed methodology. The influence of the number of turns of the loosener n, the rear cutting angle ε, the speed of movement υ and the hardness of the soil H on the traction resistance and the number of revolutions per 1 meter of the traveled distance of the loosener were studied. The soil in the soil canal was gray forest soil with a medium loamy texture. The values of soil density at the level of 1500 kg•m -3 with its moisture content of 17-18%, and the hardness varied in the range of 1.8-2.35 MPa. As a result of the calculations, regression equations were obtained for the traction resistance of the loosener and for the number of revolutions per meter of distance traveled. They were tested for adequacy according to the F-Fisher criterion. As a result of the research, the rational value of the number of turns n = 0.33 was established, the rear cutting angle of the loosener ε = 4-5º, the travel speed υ = 2.5 m•s -1 .

Substantiation of flat blade parameters for soil loosening

“…To determine the structural and aggregate composition of the soil [17][18] used the method of sifting it on sieves with round holes, and the method described in the studies [19][20]. The distributed soil on sieves was weighed and the relative mass of each fraction was calculated using the formula:…”