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目前国营农场使用较普遍的牵引式联合收割机型号较陈旧,设计喂入量低,一般是25公斤/秒,收割效率低,损失大,不能适应产量较高的麦田收割。在麦收中常出现脱不净、茎秆裹粮、清选筛尾跑粮等问题,即通常所说的嘴大肚子小,吃多了消化不良。多年来,为了解决这个问题,曾采用过加长茎秆筛、增加茎秆倾斜输送链(大尾巴)、增加第一清粮室筛面面积、将回转式逐藁器改成键式逐藁器,或将整个脱粒机壁加宽等办法,以增加机具的消化能力,提高效率,获得了一定的效果,但没有得到彻底解决。一九七二年以来,我们将脱粒机壁加高,内设分离轮,在抖动板上加倾斜木条,在第一清粮室筛下加导风板,筛面上加分布齿等方法,经四年麦收考查,工
At present, the more common tractor-type combine harvesters used in state-owned farms are old-fashioned, with low feed rates, typically 25 kg / s, with low harvesting efficiency and large losses, which can not be adapted to the harvest of wheat fields with higher yield. In the wheat harvest often appear off the net, stalks wrapped grain, sorting stencil running grain and other issues, which is commonly referred to as a small mouth, eat more indigestion. Over the years, in order to solve this problem, it has been used to lengthen stem stalks, increase stalk tilted conveyor chain (large tail), increase the area of the first clean room sieve surface, change the rotary killer to key killer , Or to widen the entire thresher wall and other means to increase the digestion ability of the machine to improve efficiency and achieved some results, but it has not been completely resolved. Since 1972, we have increased the threshing machine wall, equipped with separation wheel, added in the dithering board sloping wood, in the first clean room sieve under the sieve, the screen surface distribution of teeth and other methods After four years of wheat harvest test, workers