The problem of transport supply of agro-industrial complex is investigated. The urgency of development of new agricultural vehicles is grounded. Technical and technological requirements to them and composition of a new line of vehicles are also given.
The design of «Ground channel» test bench with hardware component and methodology of experimental research of wheeled mowers are presented. The results of studies in form of integral characteristics (traction-cohesion and traction-power) of mover's interaction with the supporting surface and a method of use of experimental characteristics for the simulation of rectilinear motion of wheeled vehicles are given.
Analysis of foreign and domestic experience of certification centers and evaluation of their activities are given. On the basis of domestic experience an attempt to predict the activity of such centers in conditions of the WTO is made.
The current conception of influence of friction, lubrication, corrosion and other factors on the endurance of machines in running of machine and tractor fleet is considered.
Kinematic relations in the mechanism of forward mounting (linkage) during its swing in horizontal plane are considered. The obtained data can be used in formulation of differential equations of motion of machine-tractor unit.
Curvilinear motion of a tracked vehicle with change in curvature of trajectory in magnitude and direction is considered. Through the analysis of differential equations of controlled motion, it is justified what parts of trajectories are the most dangerous under skidding. Inertial moments of a tracked vehicle corresponding to various configurations of trajectory were found using the distribution graphs of curvature of trajectory along the way.
A method of computer traction calculation of traction-power tractor is stated. Its traction performance without ballast, with ballast and with third driving (paddock) axle are calculated and constructed.
The stress-strain state of metal in deformation zone under the screw compression is considered using a mathematical model of process. This model allows to determine the limiting tangential stresses in a workpiece at the exit of deformation zone, which do not lead to the destruction provided by twist in the process of deformation.
Construction of a tool for the beardless ridge-coulisses tillage on sloping agricultural landscapes is given. The design of process of forming the ridge-stubbles coulisses, ensuring the reduction of melt water and erosion processes is described. New tool provides the high technological reliability during the tillage on various agricultural backgrounds when soil moisture in the plow layer is up to 25% and hardness is up to 3 MPa.
The production process of tractors manufacturing should provide for its regulation to ensure the given plant level of reliability. The higher reliability of the tractor, the more expensive its design and manufacture are. At the same time the costs of maintaining tractors in working condition are decreased. Contradictory nature of these costs allows to optimize the level of tractor's reliability.
Brief information on the importance of potatoes in the world is given. Principal trends in the development of agricultural machinery for the Smart Farming technologies are shown. Structural features of planting, harvesting and other special machines for potatoes including the machines intended for Smart Farming technologies are considered. The current trends of development of agricultural machinery are briefly presented.
Results of theoretical and experimental studies of a new technology for the restoration of haymaker spring teeth on the example of hard-core cross-teeth rakes ГП-14 are presented. Functional dependences of influence of recovery rational modes on the parameters of spring teeth are revealed. A recommended mode of technological process of the spring teeth restoration by electromechanical treatment is determined.
On the basis of experimental input data the commercial efficiency of conversion of automotive diesels in gas-diesel and gas-spark-ignition engines is calculated. Analysis of both options' performance is given, taking into account the load factor of engine.
Based on the analysis of various possible parameters of agricultural tractors classification describing their performance, the expediency of promising system for classification by two parameters - operating power and nominal traction force, is grounded. To illustrate the possible use of two-parameter classification of wheeled tractors (with wheel sizes 4K4a and 4K4b) and crawler tractors, some complex of dimension types in some way reflecting the Russian market and the designs made by Russian, Byelorussian and Ukrainian tractor plants at the beginning of 2008 is presented.
A technology of engine's camshafts restoration by plasma welding is brought. Structure and hardness of built-up metal are described. Comparative evaluation of results of the laboratory testing of samples is presented.
The possibility of calibration tests of fatigue sensors during the asymmetric cycles of stresses, carried out according to the «rotary bending test» scheme, is investigated. Construction of calibration sample has been developed. A calibration curve for the fatigue sensors made from perforated aluminum foil is shown.