Development and Application of Internal Circulating Water-cooled Electromagnetic Separator

For dusty and explosive use environment, especially in coal mines, mostly self-cooled and water-cooled electromagnetic iron separators are used. This article introduces the application of water cooling internal circulation technology to electromagnetic separator equipment for the first time, the advantages and disadvantages of the three cooling methods as well as the development process and application prospects of the internal circulating water-cooled electromagnetic separator are introduced and analyzed respectively.

INCREASING THE EFFICIENCY OF MULTY-VARIANT CALCULATIONS OF ELECTROMAGNETIC FIELD DISTRIBUTION IN MATRIX OF A POLYGRADIENT SEPARATOR

An approach is proposed to carry out multivariate calculations of the magnetic field distribution in the working gaps of a plate polygradient matrix of an electromagnetic separator, based on a combination of the advantages of two- and three-dimensional computer modeling. Two-dimensional geometric models of computational domains are developed, which differ in the geometric dimensions of the plate matrix elements and working air gaps. To determine the vector magnetic potential at the boundaries of two-dimensional computational domains, a computational 3D experiment is carried out. For this, three variants of the electromagnetic separator are selected, which differ in the size of the working air gaps of the polygradient matrices. For them, three-dimensional computer models are built, the spatial distribution of the magnetic field in the working intervals of the electromagnetic separator matrix and the obtained numerical values of the vector magnetic potential at the boundaries of the computational domains are investigated. The determination of the values of the vector magnetic potential for all other models is carried out by interpolation. The obtained values of the vector magnetic potential are used to set the boundary conditions in a computational 2D experiment. An approach to the choice of a rational version of a lamellar matrix is substantiated, which provides a solution to the problem according to the criterion of the effective area of the working area. Using the method of simple enumeration, a variant of the structure of a polygradient matrix with rational geometric parameters is selected. The productivity of the electromagnetic separator with rational geometric parameters of the matrix increased by 3–5 % with the same efficiency of extraction of ferromagnetic inclusions in comparison with the basic version of the device

Improving the technology of electromagnetic cleaning of automotive oil by UMS systems

An important direction of increasing the efficiency of using the equipment in the agricultural sector is the control of lubricating and cooling fluids. The main direction of improving magnetic cleaning is increasing the strength characteristics of magnetic field B, increasing the heterogeneity of the magnetic field, and also increasing the area of the magnetic field affecting the cleaned material. (Research purpose) The research purpose is to study the factors determining the level of purification of motor oils from metal and mechanical impurities in the working area of the electromagnetic separator. (Materials and methods) Concentrators under the arbitrary name UMS-2M were developed and installed in the experimental unit to create an inhomogeneous magnetic field in the working area of the electromagnetic separator. The theoretical and experimental research was based on the method of active experiment planning. (Results and discussion) The developed devices for creating an inhomogeneous magnetic field are two identical infinite chains, to which rods with spiral-shaped concentrators are attached with equal pitch. The symmetric second-order rotatable uniform plan is implemented to obtain a model of creating a force characteristic of a magnetic field. The article presents the results of theoretical and experimental studies that determine the main factors affecting the level of purification of motor oils in the working area of the separator. Three-dimensional response surfaces with variants of factor values are presented. The optimal values of the design parameters of the magnetic field concentrators of the electromagnetic separator were determined. (Conclusions) It is shown that the optimal parameters of magnetic field concentrators installed in the working area of the UMS-2M electromagnetic separator are: wire diameters of 3 millimeters, the distance between the threads of the concentrator is 11 mm. At the same time, the distance between the concentrators should not exceed 30 millimeters with an applied voltage of 48-50 volt.

Research of influence of working area geometric dimensions on spatial distribution of magnetic field inside the matrix of a polygradient separator.

The possibility of application of the Infolytica software package to solve the main tasks of work is substantiated. The computer 3D-model of electromagnetic separator was verified by solving of test problem. Comparison of results of magnetic induction research for characteristic points obtained during 3D modeling of electromagnetic separator with data obtained during experimental research showed a fairly high consistency. An analysis of geometric dimensions influence on distribution of magnetic field in a polygradient matrix was carried out for a random sampling containing three structural variants of an electromagnetic separator, the working air gap of which varies over a wide range. It is shown that determination of magnetic flux distribution for other structural variants of matrix that located inside sampling can be carried out by interpolation. For selected variants, three-dimensional computer models of electromagnetic separator are developed, their geometric characteristics and physical properties are described. A numerical-field analysis of magnetic field spatial distribution in working air gap of polygradient matrix of electromagnetic separator was carried out using Magnet module of Infolytica software package. For three three-dimensional models of electromagnetic system of separator, numerical values of magnetic induction and magnetic flux in working air gap of polygradient matrix in center of characteristic area are obtained. The obtained results for three models are compared and variant with rational parameters of working area of separator matrix is selected

УДОСКОНАЛЕННЯ ПЛАСТИНЧАСТОЇ МАТРИЦІ ПОЛІГРАДІЄНТНОГО ЕЛЕКТРОМАГНІТНОГО СЕПАРАТОРА

Constructional improvement of lamellar matrix of polygradient electromagnetic separator, research of magnetic field distribution in working area of matrix and experimental determination of separator efficiency.

ДОСЛІДЖЕННЯ СИЛОВИХ ХАРАКТЕРИСТИК ПОЛІГРАДІЄНТНОГО ЕЛЕКТРОМАГНІТНОГО СЕПАРАТОРА ПРИ ЗМІНІ ФОРМИ ПЛАСТИН МАТРИЦІ

Research of influence of elements shape of a multicomponent lamellar matrix of polygradient electromagnetic separator on its strength characteristics. For analysis of magnetic field distribution in working area of electromagnetic separator the finite element method has been used, implemented in ELCUT 5.6 software package. A numerical-field analysis of magnetic field distribution in working interpolar zones of matrix with a polygradient medium on the basis of inserts in form of an isosceles trapezium and triangular plates with a rounded apex has been carried out. According to analysis results, the maximum values of power characteristics of electromagnetic polygradient separator have been established. For a multicomponent lamellar matrix of polygradient electromagnetic separator certain geometrical dimensions of matrix elements of various shapes, at which power characteristics of device acquire the maximum value have been defined. The results of research can be used for improvement of power characteristics of basic design of electromagnetic polygradient separator