bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving the environmental performance of the diesel engine fueled by methanol and methyl ether of rapeseed oil
Authors: Likhanov V A , Kopchikov V N , Fominykh A V 
Published: May 2020

AbstractResearch aimed at reducing harmful emissions from diesel engines into the atmosphere throughout the world is of great current importance for its further introduction in transport industry. The article considers the issues related to the use of renewable alternative fuels – methanol and methyl ether of rapeseed oil, as well as the reduction in nitrogen oxide emissions by applying these fuels. The paper presents the comparative results of experimental findings (the data obtained as the result of bench testing) and theoretical ones. It has been noted that nitrogen oxide emissions (NOx) reduce by 47.4 %, when the engine is operated under nominal conditions, while at maximum torque they reduce by 33.5%.
Units for accelerated carbonation of concrete samples and repair compositions
Authors: Latypov V M , Fedorov P A , Lutsyk E V , Latypova T V 
Published: May 2020

Abstract
The article is devoted to the modernization issues of laboratory units designed for the concrete carbonation study. General pre-conditions for accelerated tests as well as developments of respective units are given. The article provides a rationale for the choice of carbon dioxide volume concentration and temperature and humidity conditions in a chamber. The article describes some variants of units with indication of their pros and cons and introduces a unit for carbonation of concrete with a humidifier and automatic control system.
Reduced emission of nitrogen oxides by the diesel engine running on methanol and methyl ether of rapeseed oil
Authors: Kopchikov V N , Fominykh A V 
Published: May 2020

AbstractRecently the use of alternative fuels obtained from renewable resources has become a focus of great interest in motor transport industry. An important requirement which alternative fuels have to meet is reduced level of toxic emission into environment. The alternative fuels considered in the article that follows are methanol and methyl ether of rapeseed oil. The paper deals with specific features of nitrogen oxides formation by the diesel engine 2F 10.5/12.0 running on these fuels under various loads and speed rates. Theoretical and experimental studies have shown a considerable decrease in toxic emissions, nitrogen oxides in particular.
Metrological and methodological support for bench studies of diesel engines
Authors: Shekikhachev Y A , Balkarov R A , Chechenov M M , Kardanov H B , Shekikhacheva L Z 
Published: May 2020

Abstract
The presence of exhaust gas emissions into the environment during the operation of diesel engines is an urgent environmental problem both for the state of the atmospheric air and for agricultural crops, since the toxic substances contained in the exhaust gas are absorbed by plants and accumulated in crop production. Thus, the environmental characteristics of diesel engines are now becoming the most important indicators in their operation. The problem of improving the performance of diesel engines is solving at the present stage in the process of their production by improving and carefully working out the design schemes and technological processes associated with the manufacture of their most important parts, and in the process of operation – by improving the methods and tools used for maintenance and repair. This approach can be considered justified due to the influence of a significant number of factors (design and operational) on the performance of diesel engines. As is known, the quality characteristics of the mixture formation and the nature of the fuel combustion process depend on the fuel supply parameters. Analysing the state of the problem of improving the performance of diesel engines, we can draw the following conclusion: the main reason for the deviation of the working cycle of engines from the set values is the deviation of the fuel supply parameters from the optimal values.
Full factor plan application to polymer composites hardness investigation
Authors: Oreshina O A 
Published: May 2020

Abstract
Polymer composites have become widespread in many fields of technology. The article considers the creation of a mathematical model for predicting the hardness of dispersed-filled polymer composite materials based on silicone rubbers of synthetic heat resistant low molecular weight rubber A type with fine aluminium hydroxide powder addition. A full factor experiment was chosen as a test method. The main statistical criteria were checked, the reproducibility of the experiments and the adequacy of the obtained model were shown.
Impact assessment of cutting angle of blade on storage density value of ice cutting process
Authors: Ganzha V A , Lunev A S , Kaizer Yu F , Vereshchagin V I , Ganzha A V , Satyshev A S , Karelin E N , Chavyraa Ch D 
Published: May 2020

AbstractThis paper concerns main results of research on interacting process of blade and ice during mechanical corrosion. It describes experimental research conditions and their main results. The paper shows argument of reasonable geometrical parameters of blades providing minimal storage density value of tested process.
A study of the static lateral stability of a tillage machine-tractor unit on a virtual stand
Authors: Lysych M N 
Published: May 2020

AbstractThe problems of studying the static lateral stability of machine-tractor units by the methods of multi-body dynamics (MBD) are considered. To create a simulation model, the virtual modeling method in CAD SolidWorks and CAE SolidWorks Motion was used. A 3d model of the MTZ-82.1 tractor was created, equipped with front and rear mounted three-point linkage. At the same time, all the basic structural elements and their geometric and mass-inertial parameters were preserved. The tractor was aggregated with front and rear mounted modular implements. To study the lateral stability, the tractor is mounted on a virtual stand consisting of a fixed base and a platform that changes the angle of inclination. Using a virtual stand, the lateral stability angles of three typical configurations of a machine-tractor unit and a tractor without attachments were obtained. For a tractor without attachments, the rollover angle was 34°, it was equipped with a single-beam rear mounted implement 36° (scheme 0 + 1), with a double-beam rear mounted implement 25° (scheme 0 + 2), with a front mounted implement and a double-beam rear mounted implement 36° (scheme 1 + 2). Verification of simulation data was carried out by comparing with experimental data obtained at a stationary stand. The difference in the values of the critical angles of lateral stability of the tractor, obtained by the results of virtual modeling and using the method of rollover the tractor on a stationary stand, is 3 … 5°.
Fixing a comfort cabin level in modern mining excavators
Authors: Dyorina N V , Velikanov V S , Gasanenko E A , Yuzhakova Yu V 
Published: May 2020

Abstract
Foreign policy events of recent years, expressed in the adoption of sanctions, along with the global economic crisis, have identified the need for import substitution in Russian industry. The issue of import substitution in the mining industry is strategically important, because it determines the vector of development of the Russian economy. Therefore, in order to increase mineral extraction capacities, it is necessary to re-equip the parks with new-generation modern excavators and modernize existing models. In order to increase consumer value, and hence competitiveness, it is necessary to develop excavation equipment in several areas, an important role belongs to improving the materials of the mechanical component of the excavator, as well as improving the interaction of man and machine based on the principles of ergonomics and engineering psychology. The work presents an original software product created to solve the automation problem of the ergonomic reengineering process with the possibility of ranking models of mining excavators by the comfort level in the cab.
Ensuring safe operation of the piping connection of apparatus column type
Authors: Mazina Z R , Zh Seysenov S , Sh Abyzgildina S , Tlyasheva R R 
Published: May 2020

Abstract
To ensure the safe operation of the piping connection of the column type apparatus, it is necessary to determine the potential destruction zones of the pipeline, which can lead to its depressurization and the realization of an accident with the “domino effect”. The article presents an algorithm for assessing potential zones of destruction of piping connection of column-type devices, which can be used to make decisions aimed at improving the safety of hazardous production facilities in the oil and gas industry, both at the design stage and during operation, as well as during diagnostic works.
Investigation of the dynamics of the manipulator drive with a stepper motor
Authors: Emelyanov R T , Klimov A S , Olenev I B , Turysheva E S , Avlasevich A I 
Published: May 2020

Abstract
A mathematical model of the manipulator drive with a stepper motor is developed in the form of inductance equations, which is a source of reactive moment, inertial moment equation and angular velocity. Stepper motors work in the drives of manipulators with continuous movement, when the control action is given by a sequence of electrical pulses. The block diagram of the speed and current control loop of the stepper motor, given by the operator, is calculated in the computer (full step, direction, correction value for reverse speed, acceleration braking), the data is sent to the controller, in the controller the signals pass through the hard logic circuits and are sent to the driver. The stepper motor driver board generates a signal that is fed to the stator windings of the stepper motor. The results of mathematical modeling in MATLAB & Simulink are presented. The dependences of the oscillatory process of the system in the transients of the stepper motor, which are oscillatory in nature, are obtained. A comparison of the results of theoretical modeling of the operation of a step drive with experimental studies is given. As a result of the simulation, additional dynamics arise in the armature current circuit, however, at the point of the nominal mode, it does not significantly affect the angular velocity regulation processes, that is, the speed regulator provides its astatic regulation under the action of a constant load moment.
Power and fuel efficiency of a diesel engine with separate feed
Authors: Anfilatov A A , Chuvashev A N 
Published: May 2020

AbstractThe paper presents the power and economic indicators of tractor diesel in the first place, which depends on the characteristics of the working process and, in particular, on the type of combustion chamber, fuel injection system. In the study of the working process of a diesel engine running on diesel fuel and on methanol with a separate feed, the necessary condition was the preservation of the same values of Nefor each studied load mode. Therefore, the primary goals of the research were to assess changes in the power and economic indicators of a diesel engine when operating on diesel fuel and methanol with a separate feed depending on the change in load.
Study of diesel operation using diesel fuel and methyl fluid
Authors: Anfilatov A A , Chuvashev A N 
Published: May 2020

AbstractThe obtained processing of the results of research in the field of science shows that domestic and foreign researchers have developed the prerequisites, conducted a series of experimental works using high-precision measuring equipment to study the working process of a diesel engine. There are studies on the possibility of using methyl fluid in diesel engines as a motor fuel. At the same time, it should be noted that studies on the use of methyl fluid as a motor fuel were carried out without studying the complex effect on environmental, effective indicators and the performance of the working process in a diesel cylinder. There is little work on the use of methyl-fluid with separate feed in high-speed small-sized diesel engines with air cooling.
Holographic 3-D control devices of the new generation
Authors: Belkin E A , Poyarkov V N , Markov O I 
Published: May 2020

Abstract
The types of new-generation devices designed for non-destructive control over the formation of the topography of a micro relief and the external geometry of a complex surface are determined. Passive control devices: a holographic Profiler operating in the visible range of electromagnetic waves. Active monitoring devices: a holographic Profiler operating in the x-ray range. A tool for structuring a three-dimensional geometric model of a complex shape surface is specified. This tool is a modular geometric approach. The modular-geometric approach allows you to restore the natural curvature of the surface in the local area of the point. The connection between the design of the control device and the method of surface modeling is established.
Research of corrosion processes in body material of electrical dehydrator
Authors: Khasbutdinova E V , Naumkin E A , Elizariev A A , Kulakov P A , Rubtsov A V 
Published: May 2020

Abstract
The task was set of determining the dependence of the quantitative indicator of the corrosion rate of the material of the body of the electric dehydrator on the composition of the aggressive medium, the development of measures to improve the quality of the assessment of workability and the assessment of the residual life, as well as ensuring the protection of the parts of the body of the electric dehydrator from exposure to the most aggressive working phases during operation. For research, rectangular samples were made of low-alloy steel 09G2S with dimensions of 20x20 mm and a thickness of 4 mm. To quantify corrosion wear, the samples were immersed for different times in three model media: ordinary water with different NaCl concentrations; the water, which has stood up from oil, with various concentration of NaCl; oil-water emulsion with an oil content in the water in the range from 7.7% to 95%. It was shown that the maximum corrosion wear is observed in a model medium, which is separated water with salt dissolved in it and characteristic of the lower bottom and lower zones of the electric dehydrator body.
Hudrodynamic vibration of knife refiner
Authors: Vikharev S N 
Published: May 2020

Abstract
The aim of this article is to study the hydrodynamic vibration of knife refiners. Such vibration occurs due to hydrodynamic processes during the operation of the mill. A mathematical model is proposed that describes hydrodynamic vibration. The hydrodynamic force that excites the mill oscillations consists of the following main components: impact of the semi-finished product on the auger blades and headset knives; forward and reverse flow interactions; pressure on the knives of the headset. These forces depend on the design and operation of the mill. The error between theoretical and experimental studies does not exceed 20%. Vibration processes of hydrodynamic origin are mainly determined by the impact of the semi-finished product flow on the auger blades at the entrance to the mill. The proposed research technique can be used in other machines, for example, in centrifugal pumps.
Clastering the forest waste processing enterprises
Authors: Anikina Yu A , Zelenskaya T V , Malanina Yu N 
Published: May 2020

Abstract
The article deals with the analysis of industrial development, the scale and degree of raw materials use, as well as the dynamics of waste generation and accumulation and their impact on the environment, convincingly showed the need for a new resource-saving, environmentally and economically sound approach and the organization of industrial production, namely waste-free production. The key center for the development of the timber industry should be the associations of enterprises that aim not only to profit, maximize profitability and increase capital, but also deeply process wood resources as a priority and focus on integrated and comprehensive development.
Compensation method of long high-pressure hose coating formation
Authors: Mingazhev A D , Krioni N K , Gafarova V A 
Published: May 2020

Abstract
Operational reliability of modern machinery is one of the topical tasks in different fields of mechanical engineering. Machines and devices as well as their particular units and parts operating in conditions of high temperatures, aggressive environment and significant loads require additional protection means. Various coatings are known to be widely used for protecting products and their parts such as gas turbine parts fire-proof and thermal protection coatings.
Method for determining the optimal operating time before replacement of high-pressure hoses of hydraulic drives of transport and technological machines
Authors: Pavlov A I , Tarbeev A A , Egorov A V , Polyanin I A , Ya Alibekov S , Lysyannikov A V , Kaizer Yu F , Matkerimov T Y 
Published: May 2020

Abstract
This article is devoted to the development of a method for determining the optimal operating time before replacing hydraulic drives of transport and technological machines using the obtained diagnostic data, which allows you to make a decision about the need to replace the elements of the hydraulic drive. The method is based on the use of the Markov chain theory, which allows us to determine the probability of transitions of hydraulic drive elements from a serviceable to a faulty state based on the results of previous inspections of machines. In this case, a simple homogeneous discrete Markov chain is used, described by a transition matrix, in which the transition probabilities allow us to identify the state in which the replacement of the hydraulic drive element is required, in particular – the high-pressure hose. With timely detection and prevention of defects associated with failures, it becomes obvious to reduce material losses, but premature replacement of expensive hydraulic drive elements will be accompanied by unreasonable costs due to underutilization of their resource. In this regard, the application of the developed method for determining the optimal operating time allows you to ensure maximum efficiency of the machine and minimum operating costs. The maximum total economic effect was used as a criterion for evaluating the efficiency of transport and technological machines.
Distributed control network for complex radio engineering systems on continuum computers
Authors: Dembickij N L , Pankratov V A , Timoshenko A V , Zhukov A O , Kartsan I N , Chefonov N S , Chefonov V S 
Published: May 2020

Abstract
The article proposes a method for evaluating the radio engineering system functional characteristics based on the use of continuum processors that combine the logical and computational capabilities of state continuous parametric assessment of a functional system. The hardware implementation of the knowledge processing system is created on the basis of continuum processors. It is integrated into the means of functional control and maintenance a state of preparedness of complex electronic equipment.
Indicators of the diesel engine combustion process when working on methanol with DST depending on the load changes in different operating modes
Authors: Anfilatov A A , Chuvashev A N 
Published: May 2020

AbstractIn the Vyatka state agricultural Academy, on the basis of the Department of heat engines, cars and tractors, the development of a 2CH 10.5/12.0 diesel engine for working on methanol using a dual fuel supply system was carried out. The paper presents an analysis of the parameters of the 2CH 10.5/12.0 diesel combustion process depending on the load change at the nominal speed and at the crankshaft rotation speed at maximum torque when working on diesel fuel and methanol with a dual fuel supply system.
Study driving dynamics of the machine-tractor unit on a virtual stand with obstacles
Authors: Lysych M N 
Published: May 2020

AbstractThe problems of studying the dynamic stability of machine-tractor units by the methods of multi-body dynamics (MBD) are considered. To create a simulation model, the virtual modeling method in CAD SolidWorks and CAE SolidWorks Motion was used. A 3d model of the MTZ-82.1 tractor was created, equipped with front and rear mounted three-point linkage. The tractor was aggregated with modular implements. To test the machine-tractor unit, a test track was simulated, consisting of four sections with various non-movable obstacles: single linear; single sequential; group linear; group sequential. In the process of modeling, the following parameters were recorded: lifting height of the geometric center of the wheels; displacement of the machine-tractor unit center of gravity in the transverse direction; linear speed. An analysis stages movement of the machinetractor unit showed that overcoming a single linear, single sequential and group linear obstacles at a speed of 0.9 m/s occurs without loss of stability. Only when overcoming a group sequential obstacle, significant oscillations in the tractor frame are observed, however, due to the balancing suspension of the front wheels, they do not always lead to the rollover of the tractor. In the future, using the developed virtual stand, it is possible to carry out studies of the dynamic stability of various configurations of a machine-tractor unit. It is also possible to change the geometry of obstacles, the angles of inclination of the support surface, the speeds of motion, the contact parameters of the wheels, etc.
New method for monitoring the residual life of high pressure hoses
Authors: Pavlov A I , Tarbeev A A , Egorov A V , Polyanin I A , Ya Alibekov S , Lysyannikov A V , Kaizer Yu F , Sharshembiev J S 
Published: May 2020

Abstract
The presented method is designed to monitoring the residual life of hydraulic drive elements. In this work, as an element of the hydraulic drive, high-pressure hoses are used, which are used in hydraulic drives of technological equipment of transport and technological machines. As a diagnostic parameter that characterizes the technical condition of the high-pressure hose, the frequency of natural oscillations of the pipeline with the liquid is adopted. Experimentally, the dependence of the natural oscillation frequency of the high-pressure hose on the dynamic loading cycles of the harmonic type was obtained, which were used to determine the probability of failure of pipelines and to find a strategy for their replacement. The probability of failure of high-pressure hoses for different periods of operation is determined on the basis of the obtained experimental dependences of the natural vibration frequency of pipelines on their operating time. Using the obtained dependences of the probability of failure of high-pressure hoses, it is possible to determine the possible residual life of pipelines and the need for their replacement. This method can be used to determine the probability of failure of other elements of the hydraulic drive, such as hydraulic cylinders, hydraulic valves, pumps, and others.
Investigation of the effect of the method of extracting a part from a mold on the presence of stone-like defects in cast steels
Authors: Skryabin M L 
Published: May 2020

AbstractThe article deals with the concept of casting defects in steelmaking and their classification. A special place among the existing defects is occupied by a stone-like fracture, which reduces the mechanical properties of finished products and is an irreversible defect. Often, a stone-like fracture appears when receiving products based on smelted models and the reasons for its formation are not fully studied. This article discusses the influence of the method of extracting a part from a mold on stone-like defects in cast steels. The results were analyzed.