Vol 80, No 8 (2013)

Kinds of plant materials are examined, as well as their physical-mechanical properties and deformations under the impact of agricultural machinery working organs.

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.

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.

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.

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.

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.

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.

Bases for the estimation of characteristics and operational modes of a drum potato sorter are given, as well as recommendations on tuber damages minimization.

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.

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.

Results of bibliometric analysis of domestic agri-engineering journals on the base of Russian Science Citation Index database are considered.