DETERMINATION OF IMPACT PNEUMATIC PADDLE WHEELS VEHICLE DEGREE OF TRACTORS AND MACHINES WHEN WORKING IN IRRIGATED FIELDS

The purpose of researches is reducing the impact of propulsion of machine-tractor unit for irrigated soil. In studies of the interaction of pneumatic propulsion irrigated soil presents Ana-lytic determine the dependence of the contact pressure arises in the soil during Pro-stroke pneumatic wheel machine-tractor unit. On the basis of experimental data the coefficients characterizing the physico-mechanical properties of soils, namely irrigated soils a = 0.054 and b = 3.453 .10 -3; for non-irrigated soils a = 0.021 and b = 0.982 .10 -3. The analytical dependence of the determination of the volume of compacted soil situated between soilattechment according physico-mechanical properties of different soils, geometrical parameters, and the mode of movement of pneumatic wheels. The mathematical model of the variation of the complex index of soil characterize the determination of the degree of influence of the pneumatic wheels on the ground. A comprehensive index of the soil is assessed qualitative characteristics of the soil changing the exposure process pneumatic wheels on the ground. Assessment of the negative impact of the wheel on the ground is carried out on the basis of changes in the qualitative characteristics of soil and their quantitative ratio. Performancence the results of experimental studies of tractor K-701 with tires F81(86) moving with a maximum hook load of unirrigated soil is a heavy loam with wet-STU 18-19% and the irrigated soil is a heavy loam with a moisture content of 24-25%. The results showed that the increase in speed of 2 to 10 km/h leads to a twofold HC-treatment coefficient of slipping for both types of soils, however, the coefficient of slipping on irrigated soils, on average, 13.3% higher compared with non-irrigated soils.