不同脱粒元件对切流与纵轴流水稻脱粒分离性能的影响

Effects of different threshing components on grain threshing and separating by tangential-axial test device

为研究不同脱粒元件对切流与纵轴流脱粒分离性能的影响,该文在自行研制的纵轴流脱粒分离试验台上,利用自制的矩形齿板、短纹杆-板齿、钉齿、刀形齿、梯形板齿对喂入量为7及8kg/s的水稻进行了脱粒分离性能试验,对比切流装置在不同脱粒元件下的功耗和初脱分离率及纵轴流复脱装置在不同脱粒元件下的总功耗、夹带损失率、脱净率、破碎率、脱出混合物轴向和径向分布等指标。结果表明,在7kg/s水稻喂入量时,刀形齿切流装置初脱分离率最高为47.71%,钉齿纵轴流复脱装置夹带损失最低为0.25%;切流装置采用刀形齿且纵轴流复脱装置采用钉齿,在8kg/s水稻喂入量时,单位功耗最低为8.51kW/(kg·s),夹带损失最低为0.31%,脱净率达到99.96%。

In order to study the effects of different threshing components on threshing and separating performance,a test of grain threshing and separating performance was carried out by using the rectangular tooth,short-rasp-bar,spike tooth,cutter tooth and trapezoidal tooth.The threshing and separating indexes,such as power,losing rate,impurity rate,primary threshing-separating rate,distribution of mixture along the axial and cylinder radial of the tangential-axial test device,were compared with the different threshing components under grain feed rate of 7 and 8 kg/s.Result showed that primary threshing-separating rate of the tangential flowing test-device with cutter tooth was 47.71%,and loss rate of axial flowing test-device was 0.25% at the grain feed rate of 7 kg/s.Unit power consumption,the loss rate and the completely threshing rate were 8.51 kW/（kg？s）,0.31%,and 99.96% respectively with the cutter tooth tangential flowing test-device and the spike tooth axial flowing test-device at the grain feed rate of 8 kg/s.