Findings of investigation of influence of the vortex chambers configuration on the air flow in crushing chamber of an experimental hammer crusher are given.
Basic requirements for mixing and dissolution devices are revealed. Construction of apparatus for feeding and mixing of friable components and liquid, providing the metered flow of both liquid and friable components is offered. Head-flow characteristics and mass feeding of a matter in the working chamber were determined experimentally.
A new constructional and technological solution improving the quality of grass seeding is proposed.
Possibility of ethanol and fuel emulsions' application as an alternative fuel for diesel engines is considered. Indicator parameters, environmental indexes and characteristics of heat generation during the diesel engine operation on ethanol and fuel emulsion are given.
Methods of carbon dust content decreasing in the exhaust gases of diesel engines by means of application of alternative fuels, namely of compressed natural gas and methanol, are considered. Results of experimental and theoretical researches allowing to draw a conclusion on the effectiveness and expediency of specified fuels application are presented.
A method of tractors grouping based on traction and capacity assessment is proposed, which allows to analyze and forecast the market segmentation more effectively in comparison with ordinary grouping methods based on engine capacity assessment.
A model allowing to estimate the quality of power transfer by dynamic systems from power source to consumer is suggested. Conditions of effective power consumption during the machine and tractor units' operation are determined.
The procedure of parameters (gear ratios) selection for automatic transmission of an industrial tractor providing the maximal performance of tractor aggregate is stated.
Causes of failure and defects of turbocompressors and also actual methods of worn-out parts repair are shortly described. The essence of developed technology of turbocompressors repair using the electrospark method is stated.
Constructional and technological configuration of a sieve-free feed grain crusher equipped with a pneumatic loading of material is suggested. Optimal diameter of limiting ring, area of annular gap between crushing chamber and disk of the rotor wheel and also number of fan blades are described.
Speeds of kernels withdrawal from holes of internal cylindrical sieve, their motion paths and speeds at the moment of contact with outside sieve are calculated on the basis of the realized theoretical researches.
Dependences between the parameters of wheel blades and the acoustic characteristics are ascertained on the basis of analysis of fields of speeds and air pressure in a running part of diametrical fan of a winnowing machine. Results of experimental researches are presented.
Relationship between the driving wheels slipping and the operation of engine of МТЗ-102 tractor on starting and acceleration modes is considered. Possibility of decreasing the slipping coefficient using the volumetric cyclic fuel supply when tractor is functioning within a technological aggregate was determined.
Problems of the axial-piston hydraulic machines repair, findings of investigation of parts and their joinings wear are considered. Degree of their influence on the hydraulic pump efficiency coefficient is ascertained. Recommendations on service life determinant parts renewal were developed.
An energy model of top drive crawler-mounted mover rolling is suggested. The process of rotation of front and back support-and-tightening rollers is considered. Formulas for the calculation of efficiency coefficient for rollers and mover were obtained.
Basic theoretical preconditions of errors probability during the machines diagnostics based on the functional parameters, associated with measurement error are given. A plan of estimation of mathematical expectations of engine functional parameters in dependence on the kind of loading law was considered.
Basic facts on the dependency of precision parameters of repair and technological equipment are given. Process of knot loading and its performances in stressedly-deformed state obtained as the results of investigation are described with a view to forecasting.
The limiting value of mean-square deviation of vacuum in a milk line during milking, providing its maximal staying in the given range is determined theoretically. Mathematical models permitting to calculate the probability of maintaining of vacuum mode in the tolerance zone are given.