DEVELOPMENT OF THE METHOD OF THERMOTECHNICAL CALCULATION OF THE ENERGY-SAVING EFFECT IN HELIUM-DRYING EQUIPMENT

  • TITLE: DEVELOPMENT OF THE METHOD OF THERMOTECHNICAL CALCULATION OF THE ENERGY-SAVING EFFECT IN HELIUM-DRYING EQUIPMENT
  • AUTHOR(S): Z.S. Iskandarov, K.T. Norkulova, G.M. Abdieva, B.M. Jumaev
  • ABSTRACT: In the article the developed method of heat engineering calculation of energy-saving effect of helio drying equipment is considered. The dependence of thermal efficiency on the amount of aspirated air in the air layer of the helio dryer. Key words: helium-drying equipment, chilled and drying chamber, solar air collector.
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EXPERIMENTAL STUDY OF DRIED TO OPTIMIZE AND OBTAIN A PRODUCT WITH NEW PROPERTIES

  • TITLE: EXPERIMENTAL STUDY OF DRIED TO OPTIMIZE AND OBTAIN A PRODUCT WITH NEW PROPERTIES
  • AUTHOR(S): J.E. Safarov, Sh.A. Sultanova, B.M. Jumaev, G.T. Dadaev
  • ABSTRACT: In the work analyzes the process of drying of food products in order to obtain experimental results of heat distribution studies in the dried product. Results on the optimization of energy consumption during drying by the use of a discrete (intermittent) drying. Inulin distribution curves are presented for the Jerusalem artichoke with a specific layer. An essential element of the separation of inulin in layers. Presented received the analytical results of applied research with the help of mathematical physics methods.
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CALCULATING EVALUATION OF THERMAL EFFICIENCY OF THE SOLAR DRYING INSTALLATIONS WITH STRAIN SOLAR COLLECTORS

  • TITLE: CALCULATING EVALUATION OF THERMAL EFFICIENCY OF THE SOLAR DRYING INSTALLATIONS WITH STRAIN SOLAR COLLECTORS
  • AUTHOR(S): Z.S. Iskandarov, K.T. Norkulova, B.M. Jumaev
  • ABSTRACT: In this paper the estimated efficiency of solar drying plants with in-line solar collectors is given. The dependence of the thermal efficiency of solar drying plants with solar collectors is determined. It is possible to optimize the temperature of the essential agent at the outlet of the solar collector.
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TORSIONAL VIBRATIONS OF A SHAFT CAUSED BY IMPRECISIONS IN THE TRANSMISSION

  • TITLE: TORSIONAL VIBRATIONS OF A SHAFT CAUSED BY IMPRECISIONS IN THE TRANSMISSION
  • AUTHOR(S): S. Pulev, G. Tonkova
  • ABSTRACT: This work investigates the influence of a possible defect in electric motors - eccentricity in the transmission between the rotating shaft and the motor. Kinematic disturbance is used to describe the imprecision. A mechano-mathematical model with two degrees of freedom is used. The differential equations describing the vibrations are derived with methods from analytical mechanics. The law of the torsional vibrations is derived analytically. Values are obtained for the periodically changing dynamic twisting moments of the shaft's sections. A numerical example is provided along with diagrams and amplitude-frequency response charts of the vibrations.
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ON THE APPLICATION OF THE FUNCTIONAL APPROACH TO THE METHODS OF PROCESSING LAYERED SUPERHARD COMPOSITES

  • TITLE: ON THE APPLICATION OF THE FUNCTIONAL APPROACH TO THE METHODS OF PROCESSING LAYERED SUPERHARD COMPOSITES
  • AUTHOR(S): E. Lashko, O. Salenko, V. Shchetynin, S. Klimenko, S. Melnichuk
  • ABSTRACT: Layered superhard composites are widely used in the manufacture of tool components, special products of aviation and space technology. Typically, these products are a plates of regular geometric shape, the final shaping of which is made by diamond grinding. Proposed finish processing of composite materials is to implement hybrid methods based on laser-jet technologies, with use the functional approach. In terms of composite materials processing laser-jet is a hybrid, capable of a certain way to influence the components of the composite at different levels – from nanozone to macrovolume. The hybridization process, which is consist of scribing, water-jet cutting, smoothing of the surface will allow according to the structure of the processed composite plates get high quality cuts. Field experiments were performed on laser-jet complex of LSK-400-5, equipped with a abrasive-jet head with water nozzle d c=0,22 mm and calibration tube Dk=1,05 mm, and also a system of combining a laser jet with the liquid stream by means of flying optics. Process of cutting the plates was performed using a Nd: YAG laser with a power of 400 W, and operating at a frequency of 50 Hz. Composite plate is a layered system coated with base layer of cubic boron nitride with 2,8 mm, common plate thickness – 4,5 mm. Using a functional approach allowed us to obtain high-quality cut (the roughness of the end is 3,2 μm, the width of the slot is 0,12 mm), while the time to perform the operation of cutting at a specified contour made up only 1,8 min.
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