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2018 Vol.43, Issue 3 Preview Page
September 2018. pp. 185-193
Abstract

Purpose: The purpose of this study was to analyze the performance factors of a rotary impact-type thresher to develop a sesame and perilla thresher, specifically to analyze the cut length of the stems and the threshing rates based on the relationship between the blade velocity and feeding speed. Methods: The materials were dried within a range of 12.3–13.0% to test the impact cut by bending. The cut lengths of the perilla and sesame stems were categorized in 6 ranges (~7.0, 7.1–10.0, 10.1–13.0, 13.1–16.0, 16.1–20.0, 20.1– (cm)). For testing the cut length and threshing rate, the upward-rotating blade velocity was varied as 11.0 m/s, 13.5 m/s, and 22.3 m/s. Feeding speeds were changed from 0.1 m/s to 2.2 m/s by the inverter connected to the feed motor. The feed rate and threshing rates without cover-casing were evaluated with the factors of thresher testing. Results: The mean cut length of the stem decreased as the blade velocity increased and/or the feeding speed decreased. As the feed rate increased up to 17.5 g/s, the cut length distributions showed no significant difference. The threshing rate was 98.9% for sesame, and flexible according to the blade velocity and feeding speed of the perilla. Conclusion: Feeding material too fast could produce longer cut stem segments, therefore, a feeding speed less than 2.2 m/s is recommended. A blade velocity of 13.5 m/s is preferable for both sesame and perilla with regard to cut length and threshing rate.

References
  1. Abrate, S. 2001. Modeling of impacts on composite structures. Composite Structures 51(2): 129-138. https://doi.org/10.1016/S0263-8223(00)00138-010.1016/S0263-8223(00)00138-0
  2. Church, A. H. 1963. Mechanical vibrations. 2nd ed. New York. Wiley: 374,424.
  3. Chattopadhyay, P. S. and K. P. Pandey. 2001. Impact cutting behaviour of sorghum stalk using a flail-cutter - a mathematical model and its experimental verification. Journal of Agricultural Engineering Research 78(4): 369-376.https://doi.org/10.1006/jaer.2000.062310.1006/jaer.2000.0623
  4. Jung, C. J. et al. 1992. Analysis and design of agricultural machinery. Seoul National University Press: 189.
  5. Kirkkari, A. M., P. Peltonen-Sainio and H. Rita. 2001. Reducing grain damage in naked oat through gentle harvesting. Agricultural and Food Science in Finland 10(3): 223-229.10.23986/afsci.5696
  6. Lee, J. S. and K. B. Kim. 2009. Development of shattering machine for sesame (Ⅲ). JBE 34(6): 425-433.
  7. Lisowski, A. et al. 2009. Suppleness of energetic plants to chopping. Agricultural and Forest Engineering - Agriculture (53): 33-10.10.1016/0021-8634(78)90104-X
  8. McRandal, D. M., and P. B. McNulty. 1978. Impact cutting behaviour of forage crops: mathematical models and laboratory tests. J. agric. Engng Res. 23(3): 313-328.https://doi.org/10.1016/0021-8634(78)90104-X10.1016/S0266-3538(99)00183-9
  9. Miu, P. I. and H. D. Kutzbach. 2008. Modeling and simulation of grain threshing and separation in threshing units—Part I. Computers and electronics in agriculture 60(1):96-104.https://doi.org/10.1016/j.compag.2007.07.00310.1016/j.compag.2007.07.003
  10. Naik, N. K., Y. C. Sekher and S. Meduri. 2000. Damage in woven-fabric composites subjected to low- velocity impact. Composites Science and Technology 60(5): 731-744.https://doi.org/10.1016/S0266-3538(99)00183-910.1007/s00107-004-0482-1
  11. Sonderegger, W. and P. Niemz. 2004. The influence of compression failure on the bending, impact bending and tensile strength of spruce wood and the evaluation of non-destructive methods for early detection. Holz Roh Werkst 62(5):335-342.
  12. SAITO. 2016. Bean Thresher. MS-400. at: www.saitonouki. jp/product/pdf/model/ms400(2014 )img029.pdf
  13. Špokas L., D. Steponavičius and S. Petkevičius. 2008. Impact of technological parameters of threshing apparatus on grain damage. Agron. Res 6(Special issue): 367-376.
  14. Wikipedia. 2018. The free encyclopedia “Skewness”. at: en.wikipedia.org.
Information
  • Publisher :The Korean Society for Agricultural Machinery
  • Publisher(Ko) :한국농업기계학회
  • Journal Title :Journal of Biosystems Engineering
  • Journal Title(Ko) :바이오시스템공학
  • Volume : 43
  • No :3
  • Pages :185-193
  • Received Date :2018. 08. 13
  • Accepted Date : 2018. 08. 31