Vol 79, No 12 (2012)

Construction of a universal quick-detachable antiskid belt allowing to improve considerably the tractive-cohesive and braking properties of wheeled machines is suggested.

Construction of an attachment for the СЗ-5.4 seeders line is developed. This device ensures the uniform depth of seeding and soil covering of furrows. The operation quality of standard and experimental ploughshares was studied.

Software for the estimation of optimal zone of machine-tractor units performance and for the quantitative evaluation of its deformation degree under probabilistic nature of external factors is presented.

The influence of changing load on machine-tractor unit movement is examined. The unit is considered as a dynamic system consisting of invariable components which are perfectly rigid bodies and connections between them are considered to be absolutely rigid or elastic viscous.

A theoretical method of tractive force calculation for disk hoeing ploughs in function of cultivated soil layer sectional area, which depends on the angle of attack, depth of tillage, distance between disks along the shaft and number of disks, is considered.

Coefficients for the assessment of technical and economic properties of free-wheel clutch mechanisms for drives of agricultural machinery were suggested. Comparative evaluation of engineering level of non-frictional type eccentric mechanisms and mechanisms with sprags was carried out.

Results of analysis of technological process of mineral fertilizers mixes entering by a spiral-screw mixer-spreader are given. It was shown that deviation of separate systems of mixer-spreader from optimal performance ratio affects on fertilizer distributor operation and disturbs the quality indexes of its performance. Further research guidelines are projected.

Findings of theoretical and experimental researches of tractors’ systems and aggregates warm-up under low environment temperatures are presented.

Evaluation of operating efficiency of frictional materials made by different manufacturers, allowing to determine the prospect of their use in high-loaded friction assembly, is presented.

Engineering solutions of the problem of soil protection from tractor wheels and crawlers impact, based on the profound analysis of rice field soil behavior, are suggested. Ploughing, leveling and smoothing of rice fields by water layer were analyzed. Special attention was paid to the cleaning of rice irrigating systems’ channels from soil and plant residues.