ТЕОРЕТИЧЕСКАЯ ОЦЕНКА ПАРАМЕТРОВ РАБОТЫ ФРЕЗЫ СНЕГООЧИСТИТЕЛЯ ОТБРАСЫВАЮЩЕГО ДЕЙСТВИЯ ВЗАВИСИМОСТИ ОТ УГЛА ЗАХОДА ЛЕНТЫ ФРЕЗЫ И РАЗМЕРОВ ЧАСТИЦ

Abstract

The work objective is to assess the effect of cutter band angle on the power required for transporting the snow by the cutter feeder of the rotary snowplow and its performance, taking into account the interaction of snowflakes with each other.
 The problem to which the paper is devoted is to find out the influence of the angle, the size of the transported particles on the productivity of the feeder cutter and the power spent on moving the snow as a group of interacting flakes of finite size.
 Research methods: theoretical studies and simulation of the feeder cutter operation during transportation of snow as a group of interacting flakes of finite size. 
 The novelty of the work lies in the fact that simulation, for the first time, gives theoretical description of changes in the productivity of a cutter and rotary snowplow feeder of and the power costs for transporting snow depending on the cutter band angle and the typical size of snowflakes in conditions of their interaction with each other, and also approximating equations of changes in productivity and power costs depending on the cutter band angle and typical size of snowflakes. 
 The study results show that an increase in the cutter band angle leads to a nonlinear increase in power costs for transporting snowflakes, described by a fourth degree polynomial. An increase in the typical flake size of the transported snow in the cutter feeder of the rotary snowplow also causes a nonlinear increase in the power costs for transporting snow, which is described by a second degree polynomial. The increase in productivity with an increase in the cutter band angle is described by a fourth degree polynomial, and with an increase in the typical flake size by the third degree one. The areas of maximum power consumption and maximum productivity have an offset relative to each other in the coordinates of the typical flake size and the cutter band angle. 
 Conclusions: the influence of the cutter band angle and the size of transported snowflakes on the main parameters of the cutter feeder operation are defined. The results of theoretical studies correlate with the results of practical studies, which indicates the feasibility of using a mathematical model that takes into account the interaction of transported snowflakes in further studies aimed at improving the efficiency of feeder of the rotary snowplows.