Study of traction dynamics of a caterpillar tractor wagon

Existing caterpillar dump trucks, including foreign ones, with relatively small amounts of work carried out seasonally, for example, when building roads in logging areas, are not effective enough. It is proposed to use trail equipment available for logging needs for road construction. LLC «Plant of Caterpillar Machines» developed a schematic solution for a caterpillar tractor wagon obtained by equipping the serial rubber trail tractor TGL-4.04 with a large-capacity dump truck and using bulldozer equipment with a turning blade. In order to assist the customer using the caterpillar dump truck based on the trail tractor TGL-4.04 in determining the loading parameters corresponding to the modes of the most efficient use of the machine under specific operating conditions, the tasks of developing fairly simple nomograms graphically linking the main load parameters of a caterpillar tractor wagon characteristics with typical operating conditions. The technique of calculation of dynamic characteristics of a caterpillar tractor wagon is stated. Variants of a dynamic passport are proposed, including a nomogram of the regular-route load. Each version of the dynamic passport contains two quadrants: in the right quadrant, the dynamic characteristic «on the engine»; in the left quadrant, the dependences of the dynamic factor on the elevation angle of the terrain and the drag coefficients for medium and heavy conditions are presented (dynamic characteristic «according to traffic conditions»). Examples of the analysis of the nature of the movement of a caterpillar tractor wagon at a given speed under given conditions are given. The proposed improved version of the dynamic passport with the nomogram of the regular-route load makes it possible to formulate practical recommendations on the values of the regular-route loads and the speeds of the caterpillar tractor wagon when transporting goods under specific operating conditions.

caterpillar tractor wagon, tangential traction force, dynamic passport, operating mode, regular-route load