Vol 83, No 1 (2016)
- Year: 2016
- Articles: 14
- URL: https://journals.eco-vector.com/0321-4443/issue/view/3653
Articles
Principles for construction of mathematical model of a modern low-toxic diesel engine for transport and technological means and agricultural machines
Abstract
The article considers the principles of mathematical modeling of thermodynamic and gasdynamic processes in modern diesel engine and in systems intended to reduce the harmful substances level in exhaust gases, namely in oxidation catalytic converter, in particulate filter with regeneration system and in selective catalytic reduction system for nitrogen oxides neutralization.
Tractors and Agricultural Machinery. 2016;83(1):3-8
3-8
Experimental research of performance of diesel engine operating on mixed fuel
Abstract
Tests of mixed fuel have been carried out on the ЮМЗ-Л6 tractor. This fuel consisted of diesel fuel and 5-20% supplement based on Chlorella vulgaris microalgae. Measurements of traction-speed and fuel-economic parameters of diesel engine under load in the field have been performed. Smokiness and toxicity of exhaust gases have been measured as well.
Tractors and Agricultural Machinery. 2016;83(1):9-11
9-11
12-16
Innovative agro-engineering solutions in design of drills for sugar and fodder beet
Abstract
Technical level of precision seed drills for sugar and fodder beet is analyzed. Faults in their design and technology such as non-uniformity of seeding and seed germination, unsatisfactory process reliability are revealed. For the purpose of faults removal, it is proposed to equip drills additionally with new working organs.
Tractors and Agricultural Machinery. 2016;83(1):16-20
16-20
Use of new generation relay in the control scheme of grain thrower
Abstract
The paper presents a protection scheme for electric motors of grain thrower, based on multifunctional relay for control of open-phase modes of supply network and on isolation of circuits to which the relay is connected. The paper also proposes the use of single-phase relay of current control with regulated time-lag for energy saving.
Tractors and Agricultural Machinery. 2016;83(1):20-22
20-22
22-25
Improvement of working fluid preparing device of a seed treater
Abstract
Experimental prototype of two-section working fluid preparing device for serial mobile seed treaters has been developed. It is mounted with four-section filling neck and elastic inner tank, and it is capable of running in continuous mode during working shift.
Tractors and Agricultural Machinery. 2016;83(1):25-27
25-27
28-31
Features of cold start of 6ЧН 13/11 engine and after start warming-up of engine and transmission unit of T-150K tractor
Abstract
The article analyzes the features of diesel engine cold start in conditions of low ambient temperature. A method for estimation of fuel combustion incompleteness in period of after start warming-up has been developed. Particular method estimating the efficiency of burned fuel heat utilization is proposed. Reliability of the proposed methods has been confirmed experimentally. The article outlines the ways of improving the efficiency and reliability of machines’ performance by means of reducing the warming-up time of engine and transmission unit in after start period.
Tractors and Agricultural Machinery. 2016;83(1):31-35
31-35
Role of soil bin in studies of processes in the “working organ - soil” system
Abstract
Development of new equipment in laboratory conditions of soil bins will facilitate the registration of changing factors of research, will allow to use the processes modeling through constructing 3D models of machines, will provide the faithful reproduction of real conditions and the convenience for performing of all-season and continuous bench tests. As a result, it will speed up the creating of new machines.
Tractors and Agricultural Machinery. 2016;83(1):36-40
36-40
Reynolds number effect on the aerodynamic characteristic of transverse fans
Abstract
Data on the dependence of Reynolds number (criterion) on air condition parameters and air flow speed are given. The results of study of Reynolds number effect on aerodynamic characteristic of geometrically similar fans in pre-self-similar area of this criterion are presented.
Tractors and Agricultural Machinery. 2016;83(1):40-46
40-46
Numerical simulation of heat and hydraulic characteristics of heat exchange surfaces of plate-finned heat exchangers
Abstract
The article presents the results of numerical simulation of airflow in the channel of heat exchange surface. Based on these results, the surface characteristics have been constructed. Evaluation of simulation results in comparison with experimental data is given.
Tractors and Agricultural Machinery. 2016;83(1):46-48
46-48
Research of movement of hexagonal and circular disk working organs of tillage machines
Abstract
The plough hexagonal disk knife has been theoretically investigated, produced and tested in laboratory soil bin and in field conditions. Using of hexagonal knives instead of standard circular ones allows to reduce the traction resistance of tillage machine and to increase significantly the quality of ploughing.
Tractors and Agricultural Machinery. 2016;83(1):49-51
49-51
51-52
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