We have special demands to the planting of the tilled crops. Unlike grain crops, the tilled crops are sowed in a line with the certain step, which permits to provide the rational placing of the plants on the feeding areas. Due to this, the necessary conditions were made for their further growth and getting of big crops. For planting of the tilled crops all over the world people apply pneumatic precision drills with vacuum seed-sowing mechanisms and the quality of realization of the operation depends on their work greatly. The process of work of the vacuum seed-sowing mechanism can be divided on basic stage, the process of catching a single seed and carrying it out of the layer of the others with the drawing hole is the most responsible among them. The analyses of the work which has been done let conclude that the influence of the agitator on the layer of the seeds in the zone of their catching with the drawing holes increases the efficiency of this process. With an aim of the activation of the working process of the central agitator the authors offer to make its blades in such a way that their working sides would be turned in the direction of rotation of the agitator and the plane of the feed disk. All this let use the agitator not only for activation of the layer of seeds but for their push to the drawing holes of the feed disk. The proof of the offered construction is presented in the article, the results of the comparative experimental researches of the serial and the modernized vacuum seed-sowing mechanisms and the analyses of obtained data are shown, conclusions have been formulated
The most labor- and energy-intensive part of potato
machine production technology is harvesting which is
done mainly with harvesters. Modern potato
harvesters meet the required efficiency data in
favorable conditions. In erroneous conditions
(primarily characterized by high or low soil moisture)
the efficiency of separating the tubers from impurities
is reduced, and the loss and damage of the products
increase. This situation is due to the imperfection of
the separation device of potato harvesters. Up to 1000
tons of soil per 1 ha is separated at the separation
device in the process of harvesting. As a result, the
potato harvesters capacity on the whole is determined
by their separators output. Nowadays, rod elevators
are most widespread and used. One of the main
drawbacks is the significant increase of tubers
damage in a case of low soil moisture mainly caused
by the contact of the tubers pile with the side frames
of the harvesting machine. From the above reasoning,
one can confirm that the increase of capacity and
functioning quality of potato harvesters’ separation
devices is an urgent scientific-and-technical task of
agriculture
The subjects of the study are the foundations of buildings with a high center of gravity, in particular, the foundations of high-rise buildings with developed upper floors due to the large consoles. From a set of loads, transferred to the high-rise building with a high center of gravity, we can highlight the most significant impacts, affecting the distribution of forces in the elements of the foundation. We reveal the factors playing a special role in the choice of design solutions for the foundations. The practical significance of this research is due to the demand for ground areas in the cities which are being developed, although they were previously considered unsuitable for construction. Today, one of the primary tasks for engineers and architects is increasing technical and economic performance of construction projects and meeting customers' requirements in the individual architecture. As a variant of increasing technical and economic performance of buildings in dense city building conditions is to use the arm structures in their design solutions that both low-rise and high-rise building can achieve the architectural attractiveness of the building and significantly increase the usable floor area. In the research, two types of the foundations were projected for the object which is an eight-apartment building in the ground conditions of Sochi. The analysis was carried out with such software as PC ING +. After receiving the results of numerical analyses we performed a comparative analysis of pile-slab and slab foundation with the seismicity of the construction site. Therefore, we have identified the most rational of two types of foundations
The article proposes the updated model of the influence of logs length onto a size of wooden chips produced with the use of a disk chipper. This article focuses on the fact that the length of any of the logs in the process of chipping is reduced. For this reason at the final stage of chipping, any of the logs with a standard initial length of 1.2 m inevitably transform into short logs, for which the conditions of chipping are significantly different from the chipping conditions at the start of chipping. The task of accounting for these changes is reduced to finding a solution of the transcendental equation. The results of numerical simulation indicate a progressing decreasing trend in the bevel angle and increasing in the length of the particles of wood chips with decreasing of logs length. Adequacy of the modeling results confirmed by laboratory tests and production experiment. Measuring linear and angular dimensions of chip real particles showed that the particles of such length may be equal to 7 cm, which is 3.5 times larger than the standard length of 2 cm. The angle of the bevel of the cutting plane of the particle may be 14º, which is approximately three times less of standard value equal 39º- 43º. We also discuss the comparison with the approximate solution, which was published in 2012 year. The article can be useful for specialists of wood-preparatory cycle in the paper industry
The main component of food pyramid is bakery products. Consumers of bakery products offer fresh bakery in any time of day, in wide assortment, produced by traditional way and possessing the beneficial properties, hypoallergenic and mainly tasty. In Russia, there is an intensive development of the new technologies, which are based on the freezing of semi-finished bakery. There was considered a possibility of pectin use with a new purpose as a crioprotector in the article. On the first stage of the researches there was a work on study of the influence of different crioprotectors on rheology of dough, dough water-absorbing ability, change of formation time and dough stability at addition of crioprotectors, change of valometric assessment of dough at addition of crioprotectors. There was an analysis of the index of “flour power”. On the results of the research, there was calculated the optimal dose of pectin introduction. There was studied the influence of different crioprotectors on structure of frozen by-products. There were cited the microphotos of frozen yeast dough. There was revealed that the best indexes of a quality of ready bread was reached at use of EMP microwave frequency of defrosting dough by-products taking into account energy expenses there was chosen the rational way of baking. There was worked out the technological scheme of bread production from frozen by-products with pectin as a crioprotector
Changing style of life, its rhythm and tendencies dictate their own conditions. The deficit of time makes us economize it on all, including the time for cooking. Among the main trends of the domestic meat market - switching consumers from frozen meat products to fresh cooled products. In connection with it the amount of consumers of meat semi-finished products grows. In the work there was considered the results of research of the Russian market of by-products. The market of frozen meat by-products is actively developed in large cities, where it has its own production. The participants of the market state that consumers have started to buy more frozen by-products by weight and the analysis of meat by-products assortment in retailing trade for 2014 testifies it. Trying to fasten their positions, operators of the market not only develop the production powers but work out new products and the analysis of dynamics of production volumes of meat by-products and shares of federal districts – producers of meat by-products testify it. The main players in this segment see the future market for complex, receipt, combined products and ready dishes that will lead to change of structure of meat semi-finished products sales
Activation of starter cultures in cold smoked sausage production is one of the most significant technological approaches which allows speeding up fermentation and decreasing the time for air drying of cold smoked sausages. During the research and experimental findings it is confirmed that the activation of starter cultures can be reached by using electromagnetic treatment.
There were presented the results of approbation of technologies of intensification of summer sausages with the application of electromagnetic treatment with low frequencies of start cultures and raw meat in the work. There were cited the results and the substantiation of working out of device for electromagnetic processing. There were determined the optimal frequencies and time for destruction and intensification of microflora growth. In the result of carried out researches there was proven that the electromagnetic processing influences the functional-technological properties and microbiological seeding of raw meat. There were cited the results of researches of influence of processed by electromagnetic field start cultures the functional-technological properties of model stuffing. On the results of researches there was carried out the approbation of offered technology in the course of which the pH, mass share of moisture and microbiological seeding of sausages are tracked. In accordance with reports of probationary center of JSC “Meat factory “Tikhoretskiy”, experimental line of summer sausages corresponds on physical-chemical, microbiological, toxicological, organoleptic indexes, terms of validity TC 9213-006-00422020-2002. Ready product was subjected the organoleptic assessment of specialists of JSC “Meat factory “Tikhoretskiy”
In recent years, Russia has paid great attention to the theoretical and practical aspects of conservation. Since electric drives consume about 70% of electrici-ty generated, the most substantial savings achieved by using variable speed drives AC and DC. In this article, for the positional DC drive with speed-dependent resistance torque we have developed three energy-saving diagrams for large movements: with a speed limit of the drive; restricted maximum current anchor chain and speed electric motor; restricted maximum and minimum values of the current anchor chain of the motor and the speed of the drive. We have developed software to determine the parameters of energy saving diagrams for large movements of the executive body of the electric DC depending on the speed torque resistance. For the considered energy saving diagrams, which provide large movement of the executive body of the electric DC, depending on the speed of the moment of resistance, it is necessary to provide the following condition – the maximum speed of the executive body of the drive must be equal to the maximum allowable speed value. We have also defined analytical dependences, allowing calculating the consumption of the electric power drive by moving its executive body, in accordance with the proposed diagrams. Realization of the developed positional control DC motor with speed-dependent torque resistance will lead to energy savings
The article analyzes the results of the evaluation of the filter element of the filter of thin clearing of fuel on the basis of the change in pressure in the common rail fuel supply system depending on mileage
For cleaning and disinfection of motor vans we can effectively apply installation for the treatment of work surfaces with a disinfectant spray. Disinfection unit is a generator of hot mist with a device for
dispersing