05.00.00 Technical science
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Description
The results of numerical experiments on the simulation of mathematical models of the functioning of the technical and technological systems for heating livestock complex have been presented in the article. The equations that establish a quantitative relationship between process parameters and the parameters of the efficiency of the heating system have been shown
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Description
The article reviews the results of the computational experiment by means of mathematic model of a small bioreactor with the bubble mixing system and catalytic heating. We considered the quantitative relationship between design parameters of a bioreactor and parameters of its effectiveness
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Description
The article contains the results of machine-tractor unit’s researches on the basis of a class 1,4 tractor having a variable rotary mass of the engine. It is concluded that the use of additional rotary mass being linked at corresponding regimes of motion to the engine’s shaft or primary transmission shaft at the tractor furthers the improvement of operation indexes of a machine-tractor unit
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RESULTS OF RESEARCHES OF THE DRIVE OF FOREST-PLANTING MACHINE WITH THE IMPROVED SAFETY DEVICE
DescriptionIt is set, as parameters of the safety device and the drive of forest-planting machine influence on the coefficient of exactness of wearing-out
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RESULTS OF EXPERIMENTAL STUDIES OF A HYDRAULIC TOOL FOR ANCILLARY EQUIPMENT TRACTOR
DescriptionThe article presents experimental studies of a new device that provides increased deepening of disk working bodies, as well as their significantly improved copying treated surface in felled areas that promotes conservation tillage unit
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RESULTS OF EXPERIMENTAL STUDIES OF THE DEVICE FOR ENERGY SATURATION OF A FUEL ON DIESEL D-243
DescriptionIn the article we have analyzed the results of measurements of pressure of gases in the combustion chamber and the fuel pressure at the inlet injector diesel D-243 at a processing frequency (acoustic and electromagnetic) fuel 17 kHz
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RESULTS OF PILOT RESEARCHES OF PETROL OIL FRACTIONS
DescriptionIn the article we show the results of pilot studies of petrol and oil fractions, their main physical and chemical properties, density and DNP, a liquid phase, two-phase area, critical area and boundary curves
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Description
The article deals with the results of research of acoustic and magnetic field influence on conductivity and pH value of hydroponic solution. For carrying out researches in this area the hypothesis of possibility of nutrient solution influence on ions by means of an acoustic and magnetic field is set up. A laboratory scale plant was constructed for a pilot study of the hypothesis. The solution was moved in the tube passing through a ferrite ring with winding. Thus, the solution was exposed to the influence of acoustic and magnetic field. The object of research was hydroponic solution of (NH4)2SO4; (NH4)2HPO4; K2SO4; Ca(NO3)2; MgSO4 in water having adjusted concentration and acidity. The solution was taken from the tank of laboratory scale plant by means of the pump, passed through the working area of the acoustic and magnetic device, filter, and then was poured into the tank, from which the sample for pH level changing was taken. The pH value was measured at the temperature of 22С by using electronic pH-meter KL-009(1)A. For control of instrument readings acidity was tested by universal test-paper. The initial pH value of solution made 5. As a result of acoustic and magnetic treatment of solution pH value of hydroponic solution increased from 6 to 6.9. The results show the possibility of pH value correction by small energy input
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Description
The article deals with the question of experimental studies determining the degree of traction resistance of reversible ploughs, when processing a combined plow. We have determined the optimal geometric dimensions of the developed additional working bodies experimentally
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Description
The article deals with the study of the influence of the elastic damping mechanism (EDM) on the operability index for arable MTU on the basis of the 1,4 class tractor. The elastic damping mechanism was designed in order to smooth the aggregate starting, to reduce the dynamic load in transmission, to protect the engine from the external load vibration. The experimental results that were obtained while full-scale field studies of serial and test (containing EDM in transmission) machines are given in the article. Various oscillograms are analyzed: torque on the axis of tractor's driving wheel, tractive effort, the speed of the driving wheel, angular velocity of engine shaft and haulage. The mass-spectrum analysis was carried out to study the tractor characteristics in time more thoroughly. Such analysis allows to evaluate qualitatively the EDM influence. The normalized autocorrelation function and spectrum density of variation in time are studied in details for the following MTU characteristics: the wheel torque, haulage and tractive effort. These characteristics were compared with analogous characteristics for serial MTU model. The obtained results confirm that the EDM use in the tractor transmission has a positive effect on the functional MTU indexes. Obtained data can be used in mathematical modeling of MTU functioning