Wyniki wyszukiwania - Biblioteka Nauki

1

Strip casting using a single roll caster equipped with a scraper

100%

Haga T. , Akitsu K. , Kamakura K. , Kumai S. , Watari H.

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2012

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tom Vol. 55, nr 1

26--32

EN

Purpose: Purpose of this paper is to investigate the ability of a single roll caster equipped with a scraper. The purpose of the development of the single roll caster equipped with a scraper is casting of the strip without centre line segregation and porosity and with sound free solidified surface. The single roll caster can cast the strip without the centre segregation and porosity. However, the conditions of the free solidified surface and the thickness distribution are not sound. The scraper was adopted in order to improve the free solidified surface. Investigation of the effect of the scraper and the properties of the roll cast strip is the purpose of this paper. Design/methodology/approach: A scraper was developed to improve the free solidified surface condition. The scraper scribed the semisolid metal on the free solidified surface to make the free solidified surface flat. The scraper was made from mild-steel-plate, and it was coated by the insulator sheet of 2 mm-thick. The scraper was pushed to free solidified surface by the constant load. Findings: The scraper was very useful to improve the free solidified surface. AA5182 aluminium alloy strip could be cast at the speed up to 40 m/min. There was no centre segregation and porosity. There was no difference between the roll contact surface and the scribed surface. The mechanical properties of the roll cast strip were as same as those of strip made from D.C. cast slab. Hi-content Al-Mg alloy like Al-10 mass%Mg, which cannot be cast into the strip by the twin roll caster without centre segregation, could be cast into the strip without defect. Research limitations/implications: Metal which was investigated was only aluminium alloy. It is not clear that this process is useful to other alloys like steel, copper et. al. Practical implications: This process may be able to be used instead of the D.C. casting and the twin roll casting. Especially, this caster is useful the strip casting of the Al-Mg alloy. Originality/value: The single roll caster equipped with a scraper is original development. This caster may be useful for aluminium and magnesium sheet making companies.

2

Raschet linii uborki navoza pri bezprivjaznom soderzhanii KRS

75%

Golub G. , Hmelyovskiy V. , Ikalchik N. , Shabliy N.

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tom 15

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nr 3

RU

В статье проведен расчет скреперной установки для уборки навоза в условиях беспривязного содержания КРС; проведен анализ ее работы и предложены пути повышения эффективности; согласованы условия работы транспортеров поточной линии удаления навоза из коровника, установлены зависимости периодов включения в работу продольного, поперечного и наклонного транспортеров.

EN

In paper calculated the scraper systems for manure removal in loose housing of cattle, analyzed its work and the ways of improving the efficiency, negotiate the terms of the production line conveyors removal of manure from the barn, the dependence on period in the work of longitudinal, transverse and inclined conveyors.

3

Effect of auxiliary plough elements on ploughing quality

63%

Waszkiewicz C. , Klonowski J. , Klimkowski J.

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nr 53 Agric.Forest Eng.

11-16

4

Problems of wear of the chains used in mine scraper conveyors, caused by friction and corrosion

63%

Wieczorek A. N. , Wójcicki M. , Kalita M. , Kandzia R.

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tom z. 122

293--304

EN

Scraper chains are the main transport cables of scraper conveyors. Problems related to the processes of destruction of link chains used in these conveyors are described. Design of scraper chains and their division into different types for use in scraper conveyors are presented. The most common damages to chains used in scraper conveyors are presented and the reasons of their wear are discussed.

5

Badanie zjawisk występujących w procesie usuwania odchodów kurzych zgarniakami uchylnymi

51%

Waligóra T. , Sobczak J.

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tom R. 7, nr 3

57-62

PL

Badano zależności między parametrami pracy zgarniaka i kształtowaniem się pryzmy kurzego pomiotu w kanałach nawozowych. Określono wielkości sił w cięgnach roboczych i moce pobierane przez układ napędowy. Siły potrzebne do przemieszczania pryzmy nawozu wahały się w grabnicach 580-770 N, natomiast napięcia w cięgnach oscylowały w zakresie 930-1467 N. Średni pobór mocy przez układ napędowy wynosił 405 W.

EN

Testing results of the swinging scrapers at removal of poultry dropping from dung canals were presented. The way of dropping pile formation was observed. Relationships between the scraper operation parameters and forming the pile of droppings in dung canals were investigated. The forces in working strands and the power consumption by driving system were measured. The forces required to move the droppings pile ranged within 580-770 N, while the stresses in strands oscillated from 930 to 1467 N. The average power consumed by driving sistem was 405 W.