Based on the analysis of domestic and foreign scientific and patent literature, options for reducing the weight of electro technical steel in the magnetic circuits of electrical machines are explored. We have carried out a search for the best options of technology for the manufacture of magnetic cores of the stators of induction motors, aimed at increasing the utilization factor of electrical steel and improving the energy performance of electric machines. All options are described in detail and illustrated by drawings. We have listed the advantages and disadvantages of each method of manufacturing magneto-wires and the reasons why certain proposals of manufacturing technology cores have not been implemented in mass production. A variant of technology of manufacture of annular magnetic cores for mechanical induction electric motors is offered. The essence of mechanical design is to replace the laminated stator and rotor twisted from a strip of electrical steel, wound in the form of a ring with the simultaneous breaking-hell grooves with variable pitch under the stator windings and squirrel cage of the rotor coils. The effectiveness of the use of volute stator in mechanical electrical machines is confirmed in frequent controlled asynchronous torsion engine when tested pilot batch of the mechanical single-phase asynchronous motors for washing machines. This technology almost completely eliminates the problem of technological wastes of electro-technical steel regardless of the form of the stator bore (cylindrical, conical, flat end or flat line); it allows fully automate the manufacture of magnetic cores, greatly simplifies the stamps, makes them more durable
The article considers the dynamic optimization of the
drying process of grain by proper selection of the required
parameters. The calculations of the optimal
parameters of the control device
The article deals with normative legal documents, regulating safety indicators of equipment, with particular focus on woodworking machinery, including log-processing equipment. General and specific requirements have been highlighted in terms of their analyses. The necessity of safety requirements’ specification in technical guidelines, with reference to construction of industry-specific trend equipment, according to newly accepted national, interstate and international standards for purposes of conformity assessment. Nonconformities were determined on the terms in Technical Guidelines of the Customs Union 021/2011, fundamental documents for woodworking equipment GOST EH 1070 and GOST ISO 12100. Relevant topic issues are declared in this work. Manufactures consider them when risk valuation is performed in point of existing equipment and that, under development non-standard equipment, connected with diversity of normative documents, absence of information about customers’ experience, accidents while operating comparable machinery, etc. The paper emphasizes complications, which participants of standard programs face, namely, development contractors and users, accredited test laboratories and certification bodies, state oversight authorities, when woodworking machinery conformity assessment is performed. The suite of safety metrics was suggested for valuation of log-processing equipment and two-level log frames, particularly, on the basis of technical guidelines requirements TG CU 021/2011 “On machinery and equipment safety”, and standards GOST EH 1070, GOST 12.2.026.0, GOST R 5454123 and GOST R 51898. The necessity of standard realization was demonstrated in relevance to obsolete methods of control over equipment (geometric and technology accuracy). GOST 10294 was accepted in 1990 and hasn’t been actualized since that time. That is the reason why it seems impossible to estimate equipment condition, as recommended monitoring facilities are missing
The study was carried out with the financial support of
the Russian Foundation for Basic Research, within the
framework of the RFBR research project 17-02-
00475a "Application of metaheuristic algorithms to
solving direct and inverse problems of optimizing
control of spatially distributed complexes". The article
considers the task of scenario approach to project
management in case of abnormal progress of its
implementation. Various contingencies have been
analyzed in the course of project implementation. A
model of the scenario approach for project
management using the training principle with
reinforcement is proposed
For the design of rotary-film evaporators of the
technology for food production we need summary
tables of performance parameters of the process. To
obtain them it requires a significant amount of
experiments that require a large investment of time and
resources. Therefore the actual task is reducing the
cost of designing of the technological process, due to
the choice of optimal parameters of the rotor-film
evaporator. This problem can be solved by conducting
a small series of experiments aimed at identifying
general mathematical dependences of the parameters
of the processes of evaporation on the performance of
the device. Based on the obtained dependencies it is
possible to find design and selection of evaporators.
The study proceeded from the assumption that the
maximum thickening of the initial solution in the
evaporator, it is possible while achieving the
maximum possible temperature, the filing of the
original solution in the apparatus and performance
during repeated evaporation and infusions from the
fruits of chokeberry. The calculation is performed
taking into account the prevention of adhesion of
evaporated solution on the walls of the apparatus and
the rotor blades, which may reduce the quality of the
end product. The data confirm the effectiveness of the
method of repeated evaporation on the example of
concentrating the water-alcohol extracts of black
chokeberry
Condition monitoring is a necessary element of the
transport and special machinery in agriculture. The
task of the control operations other than the
determination of the technical state of the object is to
determine the required amount of work, as well as
rational amount of collateral the repair of which could
be combined with the next maintenance. Based on the
results of processing of the information, we may
generate requests for service. In the conditions of
uncertainty of receipt of requests for servicing of
individual machines, estimated volumes and timing,
we have am appropriate development of applied
technique of justification of the number of diagnostic
posts for interactive control of a technical condition
of vehicles and special machinery in agriculture. The
presented methodology is based on probabilistic
methods, and allows the quick optimization of the
number of existing posts interactive diagnostics in the
enterprise, if necessary, translating the existing posts
in "standby" mode, or Vice versa, returning from a
reserve in "work" mode. The production and
technical base of the enterprise service based on the specific assumptions are considered as a system of
mass service (SMO), and the function of such a SMO
– as the process of mass service. The process of
queuing as applied to interactive diagnosis are
"Markov" processes "death and reproduction" with a
finite or countable number of States and continuous
time. To describe the states of the system we use the
system of the Kolmogorov equations for steady state
of "Markov" process. On their basis, we have
determined average queue length, time of stay orders
in the queue, number of busy channels and the
bandwidth of the CFR. Using the intensity of the
requests and the service time of a single application
for specific equipment, the article establishes the
efficiency of online diagnosis posts. The result of the
proposed applied methodology enables timely
decision-making about the need for reconstruction or
technical re-equipment of the company
The use of regenerated oils reduces the
consumption of fresh oils for refilling, while oil
filtration during the operation lengthens their
service life and reduces the consumption of fresh
oils for replacement. To restore waste oils, a variety
of technological operations are used, based on
physical, physicochemical and chemical processes.
They are aimed at treating the oil in order to
remove aging products and pollution from it. The
studies have shown that the most effective means of
recovering the quality of waste oils are small-size
regeneration plants. The main difficulty in creating
small-sized regeneration plants is the selection of a
sufficiently effective, environmentally safe and
economically justified method for the regeneration
of waste oils, as well as its hardware design. This
work is aimed at creating an efficient centrifugal
cleaner
We have conducted experimental and analytical
studies showing the relationship of constant and pulse
forms of current sedimentation on the physicochemical
properties of chrome coatings: adhesion
strength to the substrate, residual stress, fatigue life,
elongation and contraction, yield stress, and
endurance. We have shown the methods and modes
of use of dilute electrolyte of chromium plating with
organic additives, is capable of applying a chrome
coating on parts of agricultural machines, surpassing
the properties of the coatings obtained from
electrolytes that are recommended by the GOST
standards. The proposed hardening chemical-thermal
coating technology for chromium in the manufacture
and repairing of worn parts of agricultural machinery
(rods of hydraulic cylinders, journals of crankshafts,
spools, parts, gearboxes and transmissions, etc.),
identifies the consumption of additives modifiers,
proposed methods for their determination, confirmed
by patents for inventions. The proposed technology
of worn-out surfaces of parts of agricultural
machinery of layer-block structure of the chromium
coatings with improved properties. The influence of
modifying organic additives on the structure of the
intermediate surface film of colloidal trivalent
chromium compounds, which in combination with
the parameters of the bipolar pulse current allows you
to specifically adjust the physical and mechanical
properties of crystals of the deposited chromium
layer with a grid of cracks, and without them for the
required operating conditions of dry friction or oil environments, which increases the durability of the
parts during use. The increase in yield, at the current
6-8 %, to 4 times reduces the degree of
hydrogenation of the restored details, up to 3 times
reduces internal friction, roughness, improves the
limits of strength, toughness, elongation and
contraction, increases corrosion resistance up to 3
times, obtained chromium coatings
The article presents the analyzes results of the
deconstructive approach to the process of garment
designing, which consists in structural defects
modeling; it develops the systematization of projected
design effects based on the study of modeling defects,
analysis of their appearance and methods of
elimination. The purpose of the research is the further
development of designing methodology of structural
defects in sewing products
In the article we have performed a comparative analysis
of a traditional system of air supply to the bioreactor
during the composting process and the developed system
with lateral air supply. We have proven to reduce
temperature variation of the substrate as a result of the
use of the ventilation system by 35%. During the
simulation, equal to 1.0 hour, a ventilation system with
side air flow provides a reduction of the accumulated
degree of heterogeneity of status parameters of the
substrate by 58%. Use of the ventilation system with side
air flow reduces the duration of technological cycle of
composting 7 %. This article was prepared in the
framework of the scientific project 16-48-230441 a(R)
"Mathematical modeling of the processes occurring in
the automated installation for year-round production of
organic fertilizers in the conditions of the Krasnodar
region", financed by RFBR and administration of the
Krasnodar region