• PRODUCTION OF CLEAN GRAIN FROM MULTI CROP THRESHER FOR SMALL SCALE FARMERS


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    • ABSRACT - [ Total Page(s): 1 ]ABSTRACTThe traditional methods of threshing of crops are inefficient, laborious, and time consuming and low out put. The existing fabricated machine was observed during preliminary testing to have low performance. In the light of the above mentioned problems, there is need to modify and testing multi-crop thresher to threshed grain at optimum speed. The threshing machine consist of the following component: Hopper, frame, beater, sieve, pulley, grain outlet and chaff outlet. The factors considered in this project work was feed rate at two levels of 2 level and were replicated twice (f1=2kg, f2 ... Continue Reading

         

      TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTS Title page   Certification   Dedication    Acknowledgement   Abstract   Table of contents  List of figures  List of plates List of tables’  CHAPTER ONE: INTRODUCTION                     1.1    Background of the study     1.2    Problem statement  1.3    Aims and objectives   1.4    Justification  1.5    Scope of the project  CHAPTER TWO: LITERATURE REVIEW                         2.1    Threshing Process          2.2    Agronomy of selected crops  2.2.1    Maize crop         2.2.3   ... Continue Reading

         

      CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONE                    INTRODUCTION1.1    Background of the StudyCowpea is a grain legumes appears to have originated from west-African, very widely in Nigeria were there are many wild weedy species in both savanna and forest zone (Steel, 1992).Cowpeas are now widely distributed throughout the tropics and sub-tropics. They are grown in India, south eastern Asia, and Australia the Caribbean, southern united state and throughout the low land tropical Africa. Nigeria alone produces 61% (760000 tones) of the world total production (Irtwange 2009). Despite this figures, Ni ... Continue Reading

         

      CHAPTER TWO - [ Total Page(s): 4 ]CHAPTER TWO LITERATURE REVIEW2.1    ThreshingProcessThreshing is defined by Andrew(2005) as the process of loosening the edible part of cereals grain (or other crop) from the scaly, inedible chaff that surround it. It is a step in grain preparation after harvesting and before winnowing, which separate the loosening chaff from grains. Threshing may be done by beating the grain using a flail on a threshing floor. Another traditional method of threshing is to make donkey or oxen walk in circle on the grain on a hard surfaces.(Andrew2005)Threshing is also defined as the separation of grains fr ... Continue Reading

         

      CHAPTER THREE - [ Total Page(s): 7 ]Torgue = F × rWhere,    F = Centrifugal force =2666N    R = radius of machine pulley 0.155    Torgue = F × r = 2666 × 0.155        = 413NmPower = Where,N = speed of the electric motor = 1430rpm = 3.142T = 413NmP = 2 × 3.142 ×     P = 61854.5KW3.4.3    Design for Shaft of the machine    A shaft is a rotation machine element which is used to transmit power from one place to another. The power is delivered to the shaft by force and the resultant torgue (twisting machine) set up within the shaft permits the power to be transfer in order to transfer powe ... Continue Reading

         

      CHAPTER FOUR - [ Total Page(s): 1 ]CHAPTER FOURRESULT AND DISCUSSION4.1    ResultThe experimental result obtained from the experiment is as shown in table 5.1 and 5.2 the raw data is as shown in appendix.4.2    DiscussionsA multi-crop threshing machine was modified and evaluated for performance. The threshing efficiency, unthreshed efficiency, breakage efficiency and throughput capacity were 90.1%, 9.5%, 20.1%, 143.4kg|hr for feed rate of 2kg and 90.9%, 9.1%, 14.11% and 251kg|hr for feed rate of 3kg respectively at a constant speed of 300rpm. The efficiency of threshing shows that at feed rate of 3kg the efficiency increa ... Continue Reading

         

      CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVECONCLUSION AND RECOMMENDATION5.1    Conclusion    The following conclusion was drawn from the performance carried out on the multi-crop thresher.I.    The speed of the blower was obtained which reduces the blown out of grains from the outletII.    The feed rate of 3kg favors the constant speed of 300rpmIII.    The higher the feed rates at the threshing drum the higher the throughput capacity.5.2         RecommendationBased on the result and conclusion, the following are hereby recommend for further researchI.    The inclination of the blower plate (dirt ou ... Continue Reading

         

      REFRENCES - [ Total Page(s): 1 ]REFERENCESAbdulkadir.B.H. and Olufemi A.O (2009).The design and construction of threshing machine.Assumption university journal of technology 12(3) pp199-206.Adaokoma (2001) Design and fabrication of multi-purpose grain dehauler.Eng Thesis, Department of mechanical engineering federal university technology (FUT) minna Nigeria.Adewumi (2006).Design, fabrication and preliminary testing of a thresher cleaner for grain legume, food science technology.Bates.W.N. (1999).Mechanization of tropical crops. The English language book society and temple press book ltd. London. 242-243pp.Irtwange.S.V (2009) ... Continue Reading