Wyniki wyszukiwania - BazTech

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Impact of magnetic particles concentration in ferrooil on its magnetic susceptibility coefficient χ

Frycz M., Anioł A.

Journal of KONES

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2014

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Vol. 21, No. 4

111--117

EN

The purpose of this article is to determine the effect of the concentration of magnetic particles in ferro-oil on the value of its magnetic susceptibility coefficient χ. Determination of the flow and operating parameters of slide journal bearings lubricated with ferro-oils requires, inter alia, designation the first magnetization N and the magnetic induction B vector components, dependent on the magnetic propertis of the lubricant. The fundamental problem lies in the inability to make direct accurate measurement of magnetic induction in the lubricating gap of slide bearing and its solution is to determine it on the analytical and numerical way. A key issue for the accuracy of such solutions is to obtain reasonably accurate values of magnetic susceptibility χ. This article attempts to determine these values and estimate their relationship with the concentration of magnetic particles concentration in ferro-oil being potential lubricant above-mentioned bearings. In this paper, the authors present the characteristic of experimental test benches to determine the coefficients of the magnetic susceptibility. They present method of determining this value from obtained measurement data and analyse the impact of the magnetic particles concentration in ferro-oil on its magnetic susceptibility values. Tests were performed for selected concentrations of magnetic particles in ferro-oil ranging: 2%, 4%, 6% and 8% and the tested ferro-oil was product from Unterensingen FerroTec Company (Germany) which is a mixture of colloidal mineral engine oil LongLife Gold Penzzoil class SAE 15W-40 with addition of Fe3O4 magnetic particles and a surfactant.

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Enzymatyczna estryfikacja skrobi fosforanowej kwasem oleinowym

Boruczkowska H., Boruczkowski T., Tomaszewska-Ciosk E., Drożdż W., Bienkiewicz M., Żołnierczyk A., Anioł A.

Przemysł Chemiczny

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2013

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T. 92, nr 6

1078--1082

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Wpływ warunków rozdrabniania próbki na wyniki testu Zeleny´ego

Makowska A., Obuchowski W., Cieśla L., Anioł A.

Aparatura Badawcza i Dydaktyczna

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2006

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T. 11, nr 1

53-58

PL

Określono wpływ sposobu rozdrabniania próbki ziarna pszenicy na wyniki testu sedymentacyjnego wg Zeleny´ego. W celu przygotowania próbki posłużono się czteroma różnymi urządzeniami rozdrabniającymi, a analizie poddano mąkę o różnym wyciągu. Wykazano, że do rozdrabniania próbki najbardziej nadają się rozdrabniacze walcowe. Zastosowanie młynków udarowych lub stożkowych prowadzi do zaniżania wartości wskaźnika sedymentacji. Stwierdzono również, że wraz ze wzrostem wyciągu mąki wartości wskaźnika sedymentacji ulegają zaniżeniu, bez względu na rodzaj zastosowanego rozdrabniacza.

EN

The objective of this study was to determine the effect of milling methods and flour yield on the sedimentation values. Four types of mills were used for the wheat grain grinding and products of different yield were analyzed. Results indicated that most useful for grinding of grain samples are laboratory roll mills. Use of hammer or cone mills causes decrease of sedimentation volumes. It was also showed that the higher yield of flour gives the lower values of sedimentation volumes, regardless of milling equipment used.