According to the tests, the use of ballast weight increases the efficiency of a tractor up to 20%

According to the tests, the use of ballast weight increases the efficiency of a tractor up to 20%

For a month specialists from Kharkiv Tractor Plant together with scientists from Kharkiv National Technical University have been conducting a study on traction characteristics of the following tractors:
XTZ-242K (with engine capacity of 240 hp), XTZ-243K (with a 250 hp engine) using ballast weight and a system of doubled wheels, as well as of a four-link crawler tractor XTZ-280T (with engine capacity of 220 hp).
In the course of the study, the scientists measured tractive effort on the hook of the tractor, depending on the following variables:
- load (varied depending on the depth of the plow);
- ballast weight;
- doubled wheels.
As a result of the analysis of the obtained data*, the following was established:
- the use of doubled wheels allows to increase the tractive effort without exceeding the permissible slippage (15% in accordance with state standards GOST 27021-86) by almost 70% (42 kN instead of 25 kN);
- the use of ballast weight allows to increase the tractive effort without exceeding the permissible slippage (15% in accordance with state standards GOST 27021-86) by more than 80% (46 kN instead of 25 kN);
- the use of ballast weight combined with doubled wheels allows to increase the tractive effort without exceeding the permissible slippage (15% in accordance with state standards GOST 27021-86) by more than 2.5 times (66 kN instead of 25 kN);
- XTZ-280T has demonstrated tractive effort without exceeding the permissible slippage (5% in accordance with state standards GOST 27021-86) more than 3 times (80 kN instead of 25 kN) on the ground with high humidity (20%).

Thus, the use of ballast weight and of doubled wheels increases tractor's efficiency during agricultural works by 20%, and also significantly widens the range of agricultural equipment modularized with tractors XTZ-242K, 243K.20 and 280T.

*Note: calculations were carried out according to data that were obtained empirically using wheel speed sensors, three-dimensional acceleration sensors and other inertial-measuring devices, as well as a track control system using GPS navigation. The slippage coefficient was also calculated for all modes during the study.

18.12.2017