INFLUENCE OF RIBS TYPES ON THE EFFICIENCY OF CLEANING FROM SMALL WEED IMPURITIES

ABSTRACT

The article presents the results of studies of the influence of the distance between different ribs on the efficiency of the cleaning equipment. It is known that in the cleaning process, the distance between the spacing between the ribs affects the cleaning efficiency of the equipment. In the study, five different types of ribs were prepared and studied. Based on the study results, the cleaning efficiency at a capacity of 3 tons / hour was 51.15% with a distance between the ribs of 6 mm and 49.92% at a spacing of 7 mm. Thus, in the process of cleaning from small impurities, when the distance between the ribs is more than 6 mm, the cleaning efficiency begins to decrease.

Pilot production tests are recommended in the production of ribs at a spacing of 5 mm, taking into account that cotton fiber particles will be included in the composition of impurities when the distance between the ribs with the greatest cleaning efficiency is 6 and 7 mm.

АННОТАЦИЯ

В статье представлены результаты исследований влияния расстояния между различными колосныковыми решетками на эффективность работы очистительного оборудования. Известно, что в процессе очистки расстояние между колосниками колосниковых решеток влияет на эффективность очистки оборудования. В ходе исследований были приготовлены и проведены исследования пяти различных типов колосников. По результатам исследования эффективность очистки при производительности 3 т/час составила 51,15% при расстоянии между колосниками 6 мм и 49,92% при расстоянии 7 мм. Так, в процессе очистки от мелких примесей, когда расстояние между колосниками больше 6 мм, эффективность очистки начинает снижаться.

Рекомендуется провести опытно-промышленные испытания при производстве колосников с расстоянием 5 мм с учетом того, что в состав сорных примесей будут попадаться хлопковые летучки, когда расстояние между колосниками с наибольшей эффективностu очистки составляет 6 и 7 мм.

Keywords: cleaner, pick drum, mesh surface, ribs, cleaning efficiency, cotton fly.

Ключевые слова: очиститель, колковый барабан, сетчатая поверхность, колосниковая решетка, эффективность очистки, летучка хлопка.

Introduction. Numerous scientists have conducted research on improving the working parts of equipment for cleaning cotton from small trash impurities [1-6], studying the influence of the shapes, speeds, distances, and operating modes of the working parts, as well as the thermal and humidity indicators of cotton, on the productivity and cleaning efficiency of the cleaner [7-10].

The influence of ribs cleaning on cleaning efficiency was studied by A.E.Lugachev, A.Dzhuraev, M.Agzamov, D.Tashpulatov, Zh.Mardonov and others, who proposed various design solutions [11-15].

Research Methodology. Based on the conducted research to determine the influence of various options of huller ribs on cleaning efficiency, we will consider the spacing of ribs in huller ribs.

In the studies, five different variants of huller ribs (Fig. 1) were prepared and research was conducted. On the ribs in the 1st variant, a plate made of steel with a rib thickness of 5 mm and a height of 25 mm was made, the distance between the huller ribs was 5 mm, and the working edge of the huller ribs had a radius of 3 mm. The huller ribs were placed parallel to the axis of symmetry of the spiked-plank drum. In the 2nd variant, a round rib with a diameter of 10 mm and a spacing of 5 mm was used. In the rib of the 3rd variant, a round rib with a diameter of 8 mm and a spacing of 5 mm was used.

In the ribs of the 4th variant, a steel plate and a mixture of round huller ribs were used. In this case, 10 steel plates with a thickness of 5 mm, a height of 25 mm, a distance between the huller ribs of 5 mm, and a radius of the working edge of the huller ribs of 3 mm were used, and 10 round huller ribs with a diameter of 10 mm and a distance between them of 5 mm were used. In the ribs of the 5th variant, 10 steel plates with a thickness of 5 mm, a height of 25 mm, a distance between the huller ribs of 5 mm, and a radius of the working edge of the huller ribs of 3 mm were used, and 10 round huller ribs with a diameter of 8 mm and a distance between them of 5 mm were used.

Figure 1. Overview of existing grid surfaces and huller ribs in various vanities

The distance between the huller ribs was adjusted to 4, 5, 6, and 7 mm, and the equipment productivity was 3, 5, and 7 tons/hour.

Analysis of the research results. The research results are presented in Tables 1÷4.

Table 1.

Influence of the cleaning distance of huller ribs on cleaning efficiency (distance 4 mm)

Analyzing the results in Table 1, it can be seen that the distance between huller ribs is 4 mm, and the productivity is 3 tons/hour.

When processing raw cotton of the 1st grade, the cleaning efficiency of the rib in the 1st variant was 41.01%, in the 2nd variant - 32.4%, in the 3rd variant - 33.9%, in the 4th variant - 35.73%, in the 5th variant - 37.36%. When processing raw cotton of the III grade, the cleaning efficiency of the ribs in the 1st variant was 43.4%, in the 2nd variant - 34.53%, in the 3rd variant - 36.18%, in the 4th variant - 37.91%, in the 5th variant - 39.61%. No cotton fibers were found in the separated impurities separated during the cleaning process.

When the productivity increases from 3 tons/hour to 7 tons/hour.

With the installation of a ribs of the 1st variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.02% and for raw cotton of the 3rd grade - by 3.73%.  With the installation of a rib of the 2nd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 3.93%, and for raw cotton of the 3rd grade - by 4.60%. When installing a rib of the 3rd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.73%, and for raw cotton of the 3rd grade - by 4.44%. With the installation of a rib of the 4th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.10%, and for raw cotton of the 3rd grade - by 4.41%; With the installation of a rib of the 5th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.63%, and for raw cotton of the 3rd grade - by 3.88%.

Table 2.

Influence of ribs spacing on cleaning efficiency in huller ribs (span 5 mm)

If we analyze the results in Table 2, the distance between the huller ribs is 5 mm, the productivity is 3 tons/hour, and when processing raw cotton of the 1st grade, the cleaning efficiency of the huller ribs in the 1st variant is 46.35%, in the 2nd variant - 39.53%, in the 3rd variant - 40.24%, in the 4th variant - 41.32%, in the 5th variant - 42.78%. When processing raw cotton of the III grade, the cleaning efficiency of the ribs in the 1st variant was 48.81%, in the 2nd variant - 41.74%, in the 3rd variant - 42.94%, in the 4th variant - 43.58%, in the 5th variant - 45.11%. No cotton particles were observed in the trash separated during the cleaning process.

With an increase in productivity from 3 tons/hour to 7 tons/hour, a rib of the 1st variant is installed on the cleaner, which leads to a decrease in the cleaning efficiency of raw cotton of the 1st grade by 3.83% and raw cotton of the 3rd grade by 3.77%.  With the installation of a rib of the 2nd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.05%, and for raw cotton of the 3rd grade - by 4.45%. When installing a rib of the 3rd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.40%, and for raw cotton of the 3rd grade - by 4.27%. When installing a rib of the 4th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 3.97%, and for raw cotton of the 3rd grade - by 4.50%. With the installation of a rib of the 5th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.42% and raw cotton of the 3rd grade - by 3.93%.

Table 3.

Influence of ribs spacing on cleaning efficiency in huller ribs (span 6 mm)

If we analyze the results in Table 3, the distance between the huller ribs is 6 mm, the productivity is 3 tons/hour, and when processing raw cotton of the 1st grade, the cleaning efficiency of the huller ribs in the 1st variant is 48.72%, in the 2nd variant - 41.60%, in the 3rd variant - 42.35%, in the 4th variant - 43.53%, in the 5th variant - 45.06%. When processing raw cotton of grade III, the cleaning efficiency of the ribs in variant 1 was 51.15%, in the ribs in variant 2 - 43.85%, in the ribs in variant 3 - 45.08%, in the ribs in variant 4 - 45.82%, in the ribs in variant 5 - 47.42%.

In the cleaner with a rib of the 1st variant, no cotton particles were observed in the composition of impurities separated during the cleaning process. In all other variants of huller ribs, respectively 8; 6; 7 and 6% cotton particles were observed. Also, after the completion of the cleaning process, when checking the huller ribs, cases of clogging of cotton particles with seeds in these huller ribs were detected.

When the productivity increases from 3 tons/hour to 7 tons/hour, a rib of the 1st variant is installed on the cleaner, which leads to a decrease in the cleaning efficiency of raw cotton of the 1st grade by 3.76% and raw cotton of the 3rd grade by 3.64%.  With the installation of a rib of the 2nd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 3.97%, and for raw cotton of the 3rd grade - by 4.38%. With the installation of a rib of the 3rd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.34%, and for raw cotton of the 3rd grade - by 4.25%. With the installation of a rib of the 4th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 3.94% and for raw cotton of the 3rd grade by 4.46%; It was established that when installing a rib of the 5th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.37% and for raw cotton of the 3rd grade - by 3.89%.

Table 4.

Influence of the cleaning distance of huller ribs on cleaning efficiency (distance 7 mm)

If we analyze the results in Table 4, the distance between the huller ribs is 7 mm, the productivity is 3 tons/hour, and when processing raw cotton of the 1st grade, the cleaning efficiency of the huller ribs in option 1 is 47.33%, in the huller ribs of option 2 - 40.19%, in the huller ribs of option 3 - 41.05%, in the huller ribs of option 4 - 42.03%, in the huller ribs of option 5 - 43.61%. When processing raw cotton of the III grade, the cleaning efficiency of the ribs in the 1st variant was 49.92%, in the 2nd variant - 42.42%, in the 3rd variant - 43.77%, in the 4th variant - 44.30%, in the 5th variant - 45.96%.

The impurities separated during the cleaning process contained cotton particles in the cleaner equipped with a rib of the 1st variant: 3%, 2; 3; In the huller ribs of variants 4 and 5, respectively, 13; 10; From 10 to 8% of cotton particles were observed. Also, after the completion of the cleaning process, when checking the huller ribs, cases of clogging of cotton particles with seeds in these huller ribs were detected.

When the productivity increases from 3 tons/hour to 7 tons/hour, a rib of the 1st variant is installed on the cleaner, which leads to a decrease in the cleaning efficiency of raw cotton of the 1st grade by 3.76% and raw cotton of the 3rd grade by 3.87%.  With the installation of a rib of the 2nd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.0%, and for raw cotton of the 3rd grade - by 4.44%. With the installation of a rib of the 3rd variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.41% and for raw cotton of the 3rd grade by 4.35%. With the installation of a rib of the 4th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 3.92%, and for raw cotton of the 3rd grade - by 4.44%. It was established that when installing a rib of the 5th variant, the efficiency of cleaning raw cotton of the 1st grade decreases by 4.42% and for raw cotton of the 3rd grade - by 3.99%.

The influence of the ribs spacing (of the 1st variant) on the cleaning efficiency of raw cotton of grades I and III according to the equipment's productivity is presented in Figures 1-2 in the form of a histogram.

Figure 2. Influence of the cleaning efficiency of the huller ribs on the productivity of the equipment (huller ribs of the 1st variant, grade I cotton)

 - spacing 4 mm;  - spacing 5 mm;  - spacing 6 mm;  - spacing 7 mm;

Figure 3. Influence of the cleaning efficiency of the huller ribs on the productivity of the equipment (huller ribs of the 1st variant, grade III cotton)

 - spacing 4 mm;  - spacing 5 mm;  - spacing 6 mm;  - spacing 7 mm;

As can be seen from the research results (Fig. 2), when the productivity of the cleaner with huller ribs in the 1st variant was 3 tons/hour, the highest indicator was 48.72% at a huller rib spacing of 6 mm, followed by 47.33% at a huller rib spacing of 7 mm. At a rib spacing of 5 mm, the cleaning efficiency is 46.35%, and at a rib spacing of 4 mm, it is 41.01%. When the equipment productivity is 5 and 7 tons/hour, the cleaning efficiency for intermediate distances is 39.74; 44.86; 47.28; 45.83% and 36.99; 42.52; 44.96; 43.57%.

At a rib spacing of 6 mm, the cleaning efficiency of 3 tons/hour was 51.15%, and at a rib spacing of 7 mm, it was 49.92% (Fig. 3). Consequently, in the process of cleaning from small trash impurities, the cleaning efficiency begins to decrease when the distance between the huller ribs is greater than 6 mm.

Conclusion. It is known that a mesh surface is usually used in the process of cleaning from small impurities. In foreign technology, huller ribs are used in conjunction with spiked drums for cleaning from small impurities. Experiments were conducted using 5 types of huller ribs (of various shapes, sizes, and spacing).

It is recommended to conduct pilot production tests of huller ribs with a cleaning distance of 5 mm, taking into account the inclusion of cotton particles in the composition of trash, at a distance of 6 and 7 mm between the huller ribs, where the cleaning efficiency indicators are highest.

References:

1. Parpiyev A., Shoraxmedova M. D., Xabibullayeva D. I. Izucheniye deformatsii strukturi xlopka-sirsa v texnologicheskix protsessax //Universum: texnicheskiye nauki. – 2020. – №. 9-2 (78). – S. 27-30.
2. Madumarov I.D. Paxtani issiqlik - namlik holatini muqobillashtirish va bir tekis ta’minlash asosida tozalash jarayonining samaradorligini oshirish // tex.fan.dok. diss... (DSc) T., 2019.
3. Ruzmetov R.I. Yuqori navli paxtalarni quritish texnologik jarayonini takomillashtirish // texnika fanlari bо‘yicha falsafa doktori (Doctor of Philosophy) ilmiy darajasini olish uchun tayyorlangan dissertatsiY. Toshkent. – 2020, 117 b.
4. Usmanov X.S. Paxtani iflosliklardan tozalashni takomil-lashtirilgan texnologiyasi asoslari  // texnika fanlari doktori (Doctor of Scince) ilmiy darajasini olish uchun tayyorlangan dissertatsiY. Toshkent. – 2022, 210 b.Paxtani dastlabki ishlashni muvofiqlashtirilgan texnologiyasi (PDI 70 - 2017) “Paxtasanoat ilmiy markazi” AJ, 2017. B-92.
5. Madumarov I. et al. Movement of the trash inside of fiber material when available elastic force of clutch //Engineering. – 2018. – T. 10. – №. 9. – S. 579-587.
6. Salimov A., Hua W., Tuychiyev T. Technology and equipment for primari cotton processing //China, Shanhay. – 2019. – S. 174.
7. Madumarov I. et al. Experimental results of an improved supplier in the production process and transportation //Transportation Research Procedia. – 2022. – T. 63. – S. 2998-3004.
8. Tuychiev T., Gafurov A., Jumamuratova V. Experimental results of the improved cotton regenerator under production conditions //E3S Web of Conferences. – EDP Sciences, 2024. – T. 497. – S. 03039.
9. Ruzmetov R., Mardonov B., Tuychiev T. Simulation of the process of cotton drying under the influence of a heat agent in a spiked-screw cleaner //E3S Web of Conferences. – EDP Sciences, 2024. – T. 497. – S. 03057.
10. Tuychiev T. et al. Influence of the Direction of Movement of Cotton to Pile Drums on the Cleaning Efficiency //International Scientific Conference on Agricultural Machinery Industry “Interagromash"”. – Cham : Springer International Publishing, 2022. – S. 2084-2091.
11. Мадумаров И. Д., Мардонов Б. М., Туйчиев Т. О. Анализ ухода соринок из волокнистой массы при его пространственном движении //Проблемы текстиля. – 2017. – №. 4. – С. 72-76.
12. Madumarov I. et al. Experimental results of an improved supplier in the production process and transportation //Transportation Research Procedia. – 2022. – T. 63. – S. 2998-3004.
13. Tuychiev, T., Madumarov, I., Bayxanov, B., & Raxmanova, M. (2022, November). Investigate the movement of cotton in the supplier. In AIP Conference Proceedings (Vol. 2650, No. 1). AIP Publishing.
14. Ташпулатов Д. С., Джамолов Р. К. Исследования по совершенствования агрегатов для очистки хлопка-сырsа от мелких и крупных примесей //Универсум: технические науки. – 2023. – №. 3-2 (108). – С. 70-73.
15. Абдуазимов Ш.Х. Повышение эффективности очистки хлопка-сырsа от мелких сорных примесей путем совершенствования колосниковых решеток: Дисс... канд.техн.наук: - Ташкент, 1997 г., - с.134.