CALCULATION, DESIGN AND MANUFACTURE OF HIGH-EFFICIENCY SEED PADDY CLEANING MACHINE
Rice is the main food crop in Vietnam, accounting for about 52.56 % of the total cultivated area. Furthermore, the production of rice seeds is one of the main economic activities of the rice growing industry and therefore, it is necessary to fully mechanize the seed processing on a large scale to meet the practical demands. Hence, the objective of this study is to introduce an industrial-scale rice sorting and cleaning machine for rice seed production. In the structure of the machine, there are main parts such as: grain sieve (for sorting), blowing part (for cleaning) and stone separator. Depending on the types of rice seed, the sieve hole size of the sieve unit can be changed accordingly. The performance of the machine is evaluated based on empirical studies at the production factories. The component of rice seed has either heavy or light impurities such as straw particles, mulch and rocks of different sizes. The main parameters of the sieve machine such as sieve area, speed/the number of rotations of the eccentric swing arm, or good aerodynami- efficiency air velocity. The corresponding values when they were surveyed are 1.12 m2, 400 v/min, 15,5-18,6 m/s respecticvely. The separation rate of large, light and same-sized impurities attains an efficiency of approximately 99.63 %, 99.87 %, 99.5 %,. With the aforementioned parameters, the effective productivity of the machine is 955 kg/h and the sorting efficiency of the sieve is about ≈ 99.86 % while the cleaning efficiency for impurities ranges from 99.56 -99.87 %.
Ashwin, S, Manish N, Nishith S, Rhea D’mello, Vinoda N, Yathish K & Poornesh M 2017, Design and Fabrication of Paddy Cleaning Machine. Journal of Mechanical Engineering and Automation, 2017, 7(5), pp. 145-149, DOI: 10.5923/j.jmea.20170705.04
Nguyen, V N, Rice production, consumption and nutrition, 2020 - Available at: https://www.fao.org/3/Y4347E/y4347e02.htm [Accessed 20 Nov. 2021].
Reddy, B & Chakraverty, A, Physical Properties of raw and Parboiled paddy. Biosystem Engineering, 2004, 88(4), pp. 461-466. Available at: http://agris.fao.org/agris-search/search.do?recordID=US201300945075 [Accessed 29 Mar. 2020].
DOA, 2014, Department of Agriculture, Rice Cultivation. Available at: https://doa.gov.lk /rrdi/index.php? option=com_sppage build er& view =page&id=42&lang=en. [Accessed 29 Mar. 2020].
Shetty, A, Nayak, M, Shetty, N, D’mello, R, Naik, V, Yathish, K, & Poornesh, M, Design and Fabrication of Paddy Cleaning Machine. Journal of Mechanical Engineering and Automation, 2017, 7(5), pp. 145-149. doi: 10.5923/j.jmea.20170705.04.
Roth, L O, Crow, F R, & Mahoney, G W A, An Introduction to Agricultural Engineering 2nd ed, 1975, Maryland: Aspen publishers.
Okunola, A, Igbeka, J & Arisoyin, A, Development and Evaluation of a Cereal Cleaner. Journal of Multidisciplinary Engineering Science and Technology (JMEST), 2015, 2(6), pp. 1587-1592.
Alfred Böge, Wolfgang Böge, 2021, Handbuch Maschinenbau, Grundlagen und Anwendungen der Maschinenbau-Technik, Springer Verlag.
Herbert Wittel, Dieter Muhs, Dieter Jannasch und Joachim Voßiek, 2011, Roloff/Matek Maschinenelemente: Normung, Berechnung, Gestaltung, 20. Auflage, Vieweg - Tuebner Verlag.