| 摘要 |
PCT No. PCT/SE87/00332 Sec. 371 Date Jan. 31, 1989 Sec. 102(e) Date Jan. 31, 1989 PCT Filed Jul. 10, 1987 PCT Pub. No. WO88/00432 PCT Pub. Date Jan. 28, 1988.A device for combine harvesters (11) equipped with impact straw cutters (16) of the kind equipped with a cleaning device (13) for separation of chaff from the grain and which rotary chopper is connected to the straw outlet (17) of the combine harvester, whereby the chaff coming from the cleaning device (13) and being transported by a flow of air is intended to be supplied to the rotary chopper (16). The rotary chopper is connected to the straw outlet (17) of the combine harvester. The purpose of the invention is to provide a device by which the chaff is spread over the entire harvesting breadth of the combine harvester and is also efficiently admixed with the comminuted straw such that a continuous and even distribution can be obtained on the field. This has been solved by designing the rotary chopper (16) as a lateral flow blower which is arranged to create a negative pressure at the inlet (21) of the rotary chopper, and the outlet of the cleaning device (13) is directed obliquely upwards towards the fall-out area of the straw above the inlet (21) of the rotary chopper such that the chaff is mixed with the straw prior to their reaching the rotary chopper and that the flow of air transporting the chaff to the inlet of the rotary chopper is so dimensioned as to have a pressure within the fall-out area of the straw which slightly exceeds the atmospheric pressure. |
