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1

Investigation of the Process of Separation of Fibers From Seeds During Roll Ginning

Sailov Rahib Aqaqul

Fibres & Textiles in Eastern Europe

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2023

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Vol. 31, no. 1

91--94

EN

In the initial position in the process of roll ginning, the seed is drawn to the slot of the contact gap of the knife-drum due to the tension of the fibers. Subsequently, the seed is struck with a certain impulse. The separation of the fibers from the seed after the impact of the beater occurs sequentially, not simultaneously. As a result of theoretical and experimental studies, the optimum frequency of the shock pulse on the seed (f = 18-20) was found to be the most technologically successful in terms of providing the best quality indicators of seeds and fibers. Beating in the resonance mode allows to reduce the magnitude of the shock impulse on the seed, leading to a reduction in the degree of damage to the seeds. At this moment, the seeds at the end of the strand move only under the action of an elastic restoring force. The active part of the fiber bundle section in a dynamic process can be as little as 0.001 or less. The average value of the compliance coefficient for the raw cotton variety BA-440 was determined experimentally. This allowed to determine the stiffness coefficient of the volatiles indirectly. According to the parameters obtained, the dynamic state of the system practically falls into the region of parametric resonance, where the motion is unstable. This means that the damaged seeds at the end of the strand enlarge significantly after the impact of the beater, causing the seeds to separate from the fibers.

2

Effects of Foliar Sulfur Applications on the Quality of Cotton Plant Fibre Under Water Stress Conditions

Kazgöz Candemir Derya, Odemis Berkant

Fibres & Textiles in Eastern Europe

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2021

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Vol. 29, no. 6 (150)

37--43

EN

The research was conducted to determine the effects of Sulfurfoliar applications on the fibre quality of cotton plants exposed to water stress at different growth stages in the Amik Plain (Hatay province, Turkey) in 2015 and 2016. Cotton plants were studied in three different developmental stages (vegetative growth period (VG); flowering and boll development period (FB) and boll opening period (BO)) and full irrigation was applied in some periods, while deficit irrigation was applied in the others. Sulfur fertiliser from foliar was applied in different doses (S0: 0 ml da-1, S1: 150 ml da-1, S2: 250 ml da-1, S3: 350 ml da-1). The study was carried out with three replications according to the split plot design. In the research, the effects of the water deficit and sulfur dose applications on gin turnout and fibre quality characteristics at different growth stages were investigated. Results showed that the average spinning consistency index (SCI) decreased by 11.75% due to the water deficit (compared to the treatment of TTT, irrigation in all three crop developmental stages). Similar effects were observed in the fibre length, micronaire, fibre strength and uniformity index values, which were decreased by 7.31%, 4.07%, 5.89% and 2.17%, respectively. The average gin turnout of the irrigated treatment (TTT), in which there is no deficit irrigation, decreased by 2.5% compared to the control treatment (OOO). Similar effects were observed in fibre elongation and short fibre content values which were decreased by 8.43% and 14.60%, respectively. The average S1 and S3 sulfur doses increased the gin turnout by 0.44% and 0.35%, respectively, and the S2 dose decreased it by 0.79%.

3

Theoretical Investigation of Separator Units in Saw-gin Machines. Part 2, Dynamic Behaviour

Koç, E., Demiryürek O.

Fibres & Textiles in Eastern Europe

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2006

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Vol. 14, no. 3 (57)

70--76

EN

This theoretical study aims to investigate the dynamic behaviour of saw-gin ginning machines with special reference to separator units. For this purpose, the relationship between the driving unit and separator is outlined; optimum running conditions were obtained by introducing non-dimensional parameters defining the dynamic behaviour of the separator. Here, the cotton flow-rate estimation results and the dynamic behaviour of the separator are discussed.

PL

Artykuł jest kontynuacją artykułu zamieszczonego w Fibres & Textiles in Eastem Europe, vol 13, No 3 (51), 2005. Dla celów analizy, określono zależności występujące pomiędzy zespołem napędowym a separatorem. Określono optymalne warunki pracy separatora, wprowadzając parametry bezwymiarowe, określające dynamiczne zachowanie się separatora podczas pracy. Przedyskutowano ocenę wydajności separatora poprzez określenie objętościowego przepływu bawełny przez odziarniacz piłowy oraz stany dynamiczne separatora.

4

Theoretical Investigation of Separator Units in Saw-gin Machines. [Part] 1, Cotton Flow Rate Estimation

Koç E., Demiryürek O.

Fibres & Textiles in Eastern Europe

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2005

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Vol. 13, no. 3 (51)

78--83

EN

This theoretical study is intended to investigate the performance of a saw-gin ginning machine with special reference to separator units. For this purpose, a theoretical model of the separator units of a particular saw-gin machine has been developed by introducing the non-dimensional parameters defining the mechanical operating conditions, and we have also outlined a design procedure whereby the cotton flow rate and loss of cotton can be estimated in such a system. This paper forms part of an extended theoretical investigation into the separator units of saw gin machines; here, only the flow rate estimation results obtained for the first unit of the separator have been discussed.

PL

Rozważania teoretyczne, przedstawione w artykule, poświęcono zbadaniu sprawności działania odziarniarek piłowych, ze szczególnym uwzględnieniem zespołów separatorów (rozdzielaczy). Opracowano teoretyczny model zespołu separatorów dla konkretnej odziarniarki piłowej, wprowadzając bezwymiarowe parametry, definiujące mechaniczne warunki pracy. Opracowano metodę obliczeń, pozwalającą na określenie intensywności przepływu i strat bawełny w rozpatrywanych maszynach. Przedstawiony artykuł, w którym rozważono tylko. ocenę intensywności przepływu bawełny w pierwszym separatorze, stanowi część badań teoretycznych nad pracą separatorów w odziarniarkach piłowych.

5

Algorytmy genetyczne w optymalizacji cech dynamicznych modelu naczynia wydobywczego pod względem naprężeń dopuszczalnych

Kaczmarczyk J.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

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2001

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z. 16

55-60

PL

W pracy przedstawiono wyniki zastosowania metody algorytmów genetycznych do optymalnego doboru parametrów dynamicznych modelu naczynia wydobywczego. Do jego analizy zastosowano metodę elementów skończonych. Naczynie zamodelowano skończonymi, przestrzennymi elementami belkowymi i płytowymi. Optymalizację prowadzono ze względu na maksymalne wartości przemieszczeń w czasie u(b, t) przy warunku ograniczającym narzuconym na nieprzekroczenie naprężeń dopuszczalnych (σdop.) pojawiających się w poszczególnych elementach konstrukcyjnych pod wpływem przyłożonych do nich obciążeń Q(t).

EN

In this paper the result of genetic algorithms application for the optimal selection dynamic parameters for gin tub is presented. The finite element method was used for that analysis. The gin tub was modelled by three dimensional finite beam elements and plate elements. It is optimised for the sake of maximal displacement value as a time function u(b, t), with imposed restrictive condition on not exceeding permissible stress (σdop.) appearing in individual structural members under the influence of apply load Q(t).