Kinds of plant materials are examined, as well as their physical-mechanical properties and deformations under the impact of agricultural machinery working organs.
Mathematical model of movement of grain pile components along the curvilinear separating surface of gravitational separator is presented. This model takes into account the effect of mass variation.
Trends of tractor transmissions development are examined, their features are analyzed. Advices on choice of transmission class and characteristics are given.
Bases for the estimation of characteristics and operational modes of a drum potato sorter are given, as well as recommendations on tuber damages minimization.
Results of experimental testing of a conveyer sowing device are stated.
Results of bibliometric analysis of domestic agri-engineering journals on the base of Russian Science Citation Index database are considered.
Power inputs were analyzed and equations of power consumption of soil rotary tillage with the use of self-propelled small-size soil cultivating cutters with road wheels were obtained depending on soil conditions, operation modes and machine structural features.
Working organs of combined cultivators on spring tines are examined. Parameters of spring tines’ stressedly-deformed state were obtained on the base of loads modeling. Rigidity adjustment of the tines is suggested to use them on different soils.
A program-technique and testing results of end seals coated with nanostructured material and positioned on centrifugal pumps of diesel cooling system are presented.
Diagrams of forecasting and reliability margin of technological equipment as well as diagram of parametric failure on accuracy index are presented. The algorithm is developed and its flow chart for parametric reliability forecasting by the Monte-Carlo method is formed.
Structure and operation principle of an improved soil cultivating roller are given. Interaction between teeth and perforations on roller plates and cultivated soil prevents the displacement of soil particles to one of roller side faces. It ensures the uniformity of both cultivation depth and soil density, which are necessary for further high-quality sowing.
Theory of slope angles estimation for a system containing two observation mirrors intended for the control of mechanized process and environment objects by mobile machine driver is described.
Procedure and equipment for the testing of crawled machines’ load-bearing gears in «acceleration – stopping» mode are developed. Characteristics of bench dynamic model are maximal close to the characteristics of tractor dynamic system.
Approaches to the problem of synthesis of control algorithms for gear shift using electric-hydraulic and electronic devices were examined. It is noted that well-timed shift should increase tractor velocity and a “successful” algorithm should not worsen its usability. Possible criteria were analyzed.
Basic principles of the theory of mechanical energy functioning in technological machines are suggested. Equations of force and speed factors are composed on the base of analytical mechanics. Calculated formulas of active and reactive powers for gears with elastic and inertia elements are deduced.
Preconditions, substantiations and results of the model choice of contact surface of a rider interfitted with rubber seal are presented. It was demonstrated that approximation of real roughness by sinusoidal curve is the most reliable.
The proposed technique permits to determine the minimal replacement parts consumption, to decrease expenditures on them, to regulate consumption in repair services, to reduce the probability of parts failure and the cost of machine maintenance.
Electromechanical transmission with automatic module control system including power and technological channels is suggested. Algorithm for resistance determination during segmentary-finger mover operation taking into account power expenditures for driving moment and angular velocity fluctuations is given. Operating ranges of mobile power module with mover mechanical drive and standard Т-25А tractor with КС-2,1 mover were compared.
Some well-known information about internal combustion engines impact on fuel and air as well as operation results of a new developed steam generator mounted on МТЗ-82 tractor are given.
Procedure of determination of reduction rate of geared part of agricultural tractor transmission with hydrodymamic gear is suggested.
Results of analytical investigation of gear reduction rate and transmissive sequence choice for К-744Р-05 tractor transmission are presented. Regular transmission is estimated. Two methods of hyperbolic curve division into segments are examined, taking into account that product of tangential tractive effort and velocity is the constant and condition of an obligatory reserve of engine power for temporary overloads overcoming is fulfilled. Specified gear boxes types for different machine and tractor aggregates are recommended.