Refined calculation of drive power cutting device modern machines

Currently, rubble-cleaning machines with a bar working body for cutting ballast from under the rail-sleeper grid are most widely used on Russian railways. This state of affairs is due to the fact that only machines of this type have the ability to carry out deep cutting of ballast (up to 1 m depth or more), in contrast to previously used machines. The bar working body is the main consumer of power when the machine is operating on a stretch. Structurally, the bar working body of crushed stone cleaning machines is a chain with scrapers with teeth placed on it. The main drive power of the bar chain in this case is naturally spent on cutting the ballast, and, in turn, is determined mainly by the power consumption to overcome the forces arising in the process of interaction of the working body with crushed stone ballast (cutting forces). When determining the cutting force, the formula N.G. Dombrowski, which, however, does not give a completely correct result (as shown by studies conducted at the Russian University of Transport). From the theory of soil cutting it is also known that for cutting perimeters with teeth a more correct result is given by A.N. Zelenin in determining the cutting forces. This can be explained by the fact that the formula A.N. Zelenin takes into account the design features of the cutting organ, in particular the influence of the teeth. The performed calculations showed that the use of the formulas of A.N. Zelenin instead of the formula N.G. Dombrowski in assessing the cutting force of crushed stone ballast is more acceptable when performing design calculations of the power of the cutting device.