NPO Stekloplastik

Moscow Oblast, Russia

NPO Stekloplastik

Moscow Oblast, Russia
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Medvedev A.V.,NPO Stekloplastik | Razumeev K.E.,Moscow State University of Design and Technology
Fibre Chemistry | Year: 2016

This article examines aspects of analyzing and estimating the systematic error in measuring the tension of alumina fibers on a tension tester with stationary fiber guides. The measurements are made during the rewinding and twisting of the fibers on an experimental stand. Calculations are performed to determine the components of the systematic error for the given testers. Among these components are the constant error and the periodic error, which in turn depend on the conditions of motion of the fibers in the tester’s guides, the fibers’ geometric characteristics, and the changes in the friction coefficient in relation to fiber velocity. © 2016 Springer Science+Business Media New York


Stsepurzhinskaya Z.R.,Moscow State University of Design and Technology | Razumeev K.E.,Moscow State University of Design and Technology | Medvedev A.V.,NPO Stekloplastik
Fibre Chemistry | Year: 2016

The coefficient of static friction is used in calculations of the tension on fibers during their rewinding and twisting. Composite fibers made of alumina are a new product for the Russian textiles industry, and their mechanical properties are in need of further study. This article presents results from an experiment performed by the inclined-plane method to determine the coefficient of static friction (CSF) for friction pairs: lubricated and non-lubricated composite alumina-steel fibers; the effects of a lubricant on the CSF and its stability are also evaluated. The results of the investigation are being used to design a technology for obtaining doubled fibers of alumina. © 2016 Springer Science+Business Media New York


Zueva V.,NPO Stekloplastik | Sumovskaya G.,State Enterprise Plant Elektrotyazhmash | Stepanova T.,State Enterprise Plant Elektrotyazhmash
Conference Record of IEEE International Symposium on Electrical Insulation | Year: 2010

Semiconducting fiberglass tapes were developed in order to achieve a stable, heat-resistant, chemically homogeneous semiconducting material with electrical resistance, which would be independent of the probability of the distribution of semiconducting fillers (such as carbon-black or SiC) in the dielectric binders, and in order to avoid the influence on the material resistance of the binder thickening degree during manufacture of the winding and the aging in operation. The semiconducting properties of fiberglass were achieved by introducing metal oxides into the glass mixture. This material does not contain the capacitive interlayers in its semiconducting structure and does not overheat under a high frequency voltage component. It is expedient to use it for anti-corona system of the windings, which have been exposed to voltage with high frequency harmonics. Semiconducting fiberglass tapes can be obtained with a preassigned value with magnitude of dispersion of the resistance within half an order of magnitude, either as low resistance semiconducting tape LSP-O-1 for slot parts anti-corona protection or high resistance semiconducting tapes LSP-O-2 for the end turns of high voltage windings. The resistance remains stable up to 180 C. The tapes LSP-O can be produced with thickness of 0.1; 0.15; 0.2 mm. Tapes LSP-O-2 have been applied as high resistance layers for anti-corona protection at seven turbo generators 300 MW with windings of 20 kV, which have been successful in operation for more then 25 years. Tapes LSP-O-1 have been widely used as anti-corona protection for slot parts in smaller generators and high voltage motors with windings of 6.0 - 10.5 kV, which were manufactured by VPI process "Monolit", because insulation compounds penetrate easily through the tapes. Tapes LSP-O have the highest stability to the action of the cycles of cryogenics temperatures. This material remained with the same ranges of the magnitude of electrical resistance at 77K, and at 4.2K too, when traditional semiconducting composite materials lost their conductivity. It was discovered that the LSP-O began to take on some non-linearity of electrical resistance from electrical field stress at 4.2K. ©2010 IEEE.


Beletskii B.I.,Mendeleev University of Chemical Technology | Trofimov A.N.,NPO Stekloplastik | Sventskaya N.V.,Mendeleev University of Chemical Technology | Zhuravleva N.V.,Mendeleev University of Chemical Technology | Pilepenko O.S.,NPO Stekloplastik
Glass and Ceramics (English translation of Steklo i Keramika) | Year: 2013

The process of making float-glass in large-tonnage glassmaking furnaces is analyzed. The optimal values of the rate and duration of melting and cooling of the molten glass are determined. It is shown that the melting time of the glass is 48 - 72 h and depends on the content of the cullet in the batch. The glass melt remains chemically and structurally uniform with cooling rates 10 - 12 K/h and cooling times 20 - 24 h, which yields glass of optimal quality. © 2013 Springer Science+Business Media New York.


Demina N.M.,NPO Stekloplastik | Titova O.N.,NPO Stekloplastik | Zabrodina I.P.,NPO Stekloplastik
Glass and Ceramics (English translation of Steklo i Keramika) | Year: 2013

The possibility of increasing the anhydride epoxy bonding agent impregnability of glass fabric, made from aluminum borosilicate glass, by introducing adhesives into the serially produced lubricant 4s is studied. A wide range of wetting agents, produced by different global manufacturers for fiber and organosilicon coupling agents, was tested by determining the bonding agent impregnability over the height in a capillary. The impregnability of reinforcing glass fabric was increased considerably by improving the lubricant as well as counter-modification of the bonding agent. © 2013 Springer Science+Business Media New York.

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