Analysis of Threshing Process in threshing Part of Head Feeding Type Combine

阈值，头部喂入式联合收割机脱粒部分的工作是由稻穗与脱粒器、脱粒齿的牵拉挤压作用、与凹板的摩擦等条件组成。本研究的目的之一是利用门槛齿来清除牙齿上的异物。实验装置被测，利用商品型半喂入联合收割机的部分零件，测定了脱粒齿的脱粒力。从以往的试验中得知，脱粒动作随脱粒齿的设置条件（倾角、导程角、设置角、设置节距、排距）的变化而变化，因此本试验在脱粒滚筒上设置了一个测定脱粒力的脱粒齿。齿独立于滚筒，但以与滚筒相同的旋转半径和速度旋转。本研究的参数是安装间距、安装间距和安装间距。 ...更多信息 ne节距和直齿导程角。测量点是测量螺旋力的螺旋齿的弯矩和扭矩，以及螺旋滚筒的驱动扭矩和转速。本试验是用6 ~ 8株水稻株丛，每株重约1 kgf的水稻株丛（KINMAZE品种）进行的。稻株穗束的测量项目是通过试验装置前后的总重量和脱粒后落在滚筒凹部和后部的穗的重量，并由这些数据计算出结晶率和累积结晶率。从实验结果中发现以下问题：1）在滚筒通过过程中，测量剪切力的剪切齿撞击捆6次。2）撞击捆的时间为0.01至0.02秒。3）导程角与法向导程角的比值越大或越小，轧制力越大; 4）导程角越大，轧制道次的轧制速度越大; 5）预紧齿对轧制力的影响越大;或者说是后置词而不是同时发出的锯齿。少

The threshinc., operation in the threshin, , & part of head feedin-, type combine consists of the pulling and squeezin" action of ears of rice plant with the threshinla, tooth, the friction with a concave, and the other conditions. It is an object of this study to clear the threshing operation by the threshine teeth. The experimental device measurinc., the threshin-r force of a threshinc, tooth was made by using some parts of a commercial type head feeding combine. It is known from the past experiment that the threshinu operation changes accordine to the settine condition of threshina tooth(the inclination ancle, the lead m 'm C3 anclle, the settine ancle, the settine pitch, the rotatine pitch), so a threshine tooth measuring the threshine force is set on the threshina drum in this experiment. The threshing tooth is independent of the threshing drum, but rotates with the same rotating radius and speed of the threshing drum. The parameters of this study are the setting pitch, the rotati … More ne pitch, and the lead angle of threshing tooth. The measuring points are the bending, moment and the torsional moment of the threshing tooth measuring the threshing force, and the driving torque and the rotating speed of the threshing drum. The experiment was done by using a sheaf of rice plant(variety KINMAZE)with the weight of about 1kgf that is made by gathering 6 8 hills of rice plant. The measuring terms about the sheaf of rice plant are the total weight before and after passina the experimental device and the weight of ears that is threshed and dropped under the concave and the rear position of threshing drum, and the threshing rate and the cumulative threshing rate are calculated from these data.The following matters are found from the experimental results.1)The threshing tooth measuring the threshing force strikes a sheaf 6 times during a pass of the threshing drum.2)The time for a strike of the sheaf is from 0.01 to 0.02 second. This time depends on the rotating speed of threshing drum.3)The threshing force increases in case with set larger or smaller lead angle in comparison with the normal angle.4)The threshing rate by a pass increases with the inclination of lead angle.5)It is found that the influence of threshing tooth upon the threshing force increases by the threshing teeth that are in pre- or postpositions rather than the the threshing teeth that strike at the same time. Less