Experimental Study On Gravity Separation Property Of Alfalfa Seeds

Gravity separation is one of the most important methods for seed cleaning and grading.The original seed of Alfalfa contains more sand,and it is not full of shriveled seeds.Alfalfa is the king of grass,it has a large area of cultivation,and the amount of seeds and processing equipment is also large.Also gravity separator is one of the most complex equipment in the sorting equipment.It needs to adjust the number of working parameters,resulting in increased dificulty in use.Therefore,it has practical significance to study the gravity separation of Alfalfa seeds.In this paper,the theory of the movement of seeds is analyzed.The gravity separation property of alfalfa seeds was studied.First of all,According to the analysis of gravity separator related documents,determine the property index of gravity separator,mainly the cleanliness,selected rate,productivity,the light impurityremoval rate,the heavy impurityremoval rate.The influencing factors are vibration frequency,amplitude,wind speed,longitudinal inclination and transverse angle.With the performance index as the evaluation index and the influence factor as the variable,the single factor test was carried out to get the best value of each influencing factor.On the basis of the optimum value,the orthogonal experiment was carried out to determine the frequency of vibration,wind speed and longitudinal inclination of 3 factors.Respectively,the productivity,clarity,selection rate were used as the evaluation indexes to determine the importance of the order of the 3 factors and the optimal level combination.On this basis,and then consider the balance of 3 evaluation indexes,finally get the optimal level combination of these factors,it is the vibration frequency of 368r/min,wind speed of 2.8m/s,vertical angle of 5 degrees,the corresponding index for clarity is 97.6%,the rate is 95.4%,the productivity is 62.9kg/h.The theoretical analysis and experimental research of this paper can provide data for the design of related equipment,and provide guidance for the use of gravity separation of Alfalfa seeds...