Wyniki 1-2 spośród 2 dla zapytania: authorDesc:"Mariana M. KOVTONYUK"

Substantiation of consolidated inertial parameters of vibrating bunker feeder DOI:10.15199/48.2019.04.09

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Vibrating bunker feeders are commonly used to automate production processes. They are widely manufactured by different world enterprises: Spirol International Corporation, Moorfeed Corporation A Division of Executive Automation Systems Inc., NTN Corporation. [1-5]. Two main types of vibration bunker feeders can be distinguished: with directed (fig. 1) and independent (fig. 2) oscillations. In vibration bunker feeders with independent (elliptical) oscillations, the direction of throwing is provided by force disturbance at two independent coordinates. Therefore, for determining the coefficients of stiffness of elastic nodes, we use well-known expressions for the consolidated mass at rectilinear oscillations or the consolidated moment of inertia of the system at angular oscillations [6-10]. a) b) Fig. 1. Vibrating bunker feeders with guided (screw-like) oscillations in which the bowl is made cylinder-like (a) and a conical-like (b) In vibration bunker feeders with propeller oscillations, the direction of throwing is ensured due to sloping elastic elements. In such structures, the propeller movement involves two: rectilinear and angular. Therefore, in order to determine the stiffness coefficient of an elastic node on the basis of a hyperboloid torsion, it is necessary to know the consolidated mass or the summed moment of inertia at propeller-shaped oscillations, which themselves contain, respectively, the proportion of the consolidated moment of inertia of the system at angular oscillations or the consolidated mass in rectilinear oscillations [11,12,16]. Fig. 2. Vibrating bunker feeder with independent (elliptical) oscillations In the technical literature you can find methods for calculating vibration bunker feeders parameters. One of the defining parameters is the consolidated mass or the summed moment of inertia of the oscillatory system, the motion of which is carried out on a propellant trajectory. It is impossible to c[...]

Mathematical models of dynamics of friable media and analytical methods of their research DOI:10.15199/48.2019.04.13

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Methods of vibration treatment, vibration transporting, separation, adhesion, and hence the corresponding machines and equipment have been widely used in various industries [1-4]. Their implementation contributes to the intensification of various production processes, increases the level of mechanization of labor-intensive work, increases economic efficiency and productivity. With an increase in the intensity of production, the scope of application of vibrating machines expands, and new ones are created for various technological operations [1,4,5]. This is due to the simplicity of their designs, and in many cases, higher performance than that of conventional machines. Especially effective application of vibration equipment is in the chain of technological processes, which are associated with the processing of various friable mixtures, their dosage, mixing, separation, sealing, etc. [6,7]. In this case, along with the intensification of technological processes during the vibrational impact on the material, the quality of the final product improves: due to constant vibration, a high degree of separation of the mixture by its physical, mechanical or other properties is achieved. Despite the significant progress in the creation of a new and modernization of existing vibration equipment, theoretical studies related to the vibrational processes of friable media - sieve have not been properly developed due to the lack of satisfactory methods for analyzing these complex dynamic processes [8,9]. Above mentioned, on the one hand, led to the intensive introduction of vibration processes into production, on the other hand - it requires to change the basic dynamic characteristics of the working containers, and on this - the dynamics of the friable media, that is, using vibration machines of a controlled type [1,5,8,10-13]. For them, as a rule, there is no transition via the resonances of individual units and the machine as a whole, whi[...]

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