Experiment Study & Working Mechanism For Rape No-tillage Seeder Key Parts

Our country is a large rape producer,whose average plant area keeps the biggest in the world all the time.The southern winter rape area is the main rape producing area of our country,with gravelly fall behind cultivating means,big working intensity and low economic effect. Mechanization is the only way to change the present cultivating means.The key technique in rape cultivating is to control the fundamental seed quantity and keep smoothly drainage in the field,the two of which involves the seedling system and the ditching system in machinery.However,the present seedmeter used in rape cultivating is still immature and the seedling precise is hard to control;while the ditcher in market are numerous,most of which belongs to industrial product with high power,heavy weight,and high cost which is unsuitable for field working.Especially with the scarce theoretical research in the interaction between machine and soil,aimed at the key part of the rape mechanization cultivating machinery,this research has carried on certain theoretical study in the seedling system and the ditching system and designed the 2BYF-6 type non-cultivated combined rape seeder.Through this,it has provided certain theoretical basis for designing such type of non-cultivated combined rape seeder.The fundamental parameter of the designed seedling system is calculated through test on physical machinery property of the rape seed and analysis of seedling principle on the Socket hole-wheel seedmeter.By use of the Solidworks software,the structural parameter of seeder is optimized through structural designing and simulating of the seeder which is the core part of seedling system,and is finally tested by lab experiments and field seedling experiments.The results show that this seedling system can satisfy the smoothly seedling requirement.Ditcher is one of the key parts of the 2BYF-6 type non-cultivated combined rape seeder.By means of the Matlab optimizing tool case,this research first set the knife disk structure parameter by structural optimizing design of the ditching knife disk.On basis of this,the motion model of ditching knife disk in soil is established from the Kinetics angle so as to study the mathematic model in kinetics of the soil,which has gone through the effect of knife in 3 continuous processes of cutting soil,moving soil,and throwing soil.The results show that while moving the soil,its speed and acceleration are connected not only with the structure dimension R_i,R_l,ψ₀δof Rotary knife and the motion parameterδ,but also with the fiscal machinery property f,^k of soil and the motion direction of soil on the tangential side of the blade.With the rotary knife structure and motion parameter set,the speed and acceleration of soil become mainly connecting with the motion direction angleθof soil on the tangential side of the blade and the ratio parameter k of its support on the tangential side of the blade(the fiscal machinery property) to its mass.Finally,by using of Maple software to simulate the related mathematical model,the effect weight of each related parameter is further decided.By taking premises of the collision between the tossed soil and blocking soil board,the condition of collision between them is set,thus gets the effect of the material,form,installation location of the blocking soil board on toss of soil.In realization of evenly covered and smashed soil piece test,the study on ditching property of non-cultivated seeder is carried out by using mono-factor and multi-factor orthogonal test to examine the effect of machinery structure and fiscal machinery property on ditching and covering, through which,the correctness of theoretical analysis has been verified from the testing angle.