Double-drum-sieve cleaning device and longitudinal axial flow ratoon rice combine harvester with the same

Abstract

The invention provides a double-drum-sieve cleaning device and a longitudinal axial flow ratoon rice combine harvester with the same. The double-drum-sieve cleaning device comprises double drum sievesand a double-outlet cleaning draught fan. A lower air outlet of the double-outlet cleaning draught fan is located in front of the double drum sieves and used for blowing large debris out of the machine in cooperation with the double drum sieves. An upper air outlet of the double-outlet cleaning draught fan is located above the double drum sieves and used for directly blowing light debris discharged by a threshing device out of the machine. A grain slide plate and a shaking plate divide a cleaning chamber into an upper cleaning area and a lower cleaning area, the upper cleaning area is used for directly blowing the light debris discharged by the threshing device out of the machine, and the lower cleaning area is used for blowing the large debris out of the machine. The limited longitudinalspace between the threshing device and a cleaning mechanism is sufficiently used for primary winnowing, the design power of the drum sieves can be reduced, and the light debris is directly blown outof the machine without being scattered by the drum sieves by reasonable use of the draught fan.

Description

technical field [0001] The invention relates to the field of harvester cleaning devices or the field of agricultural harvesting equipment, in particular to a double-cylindrical screen cleaning device and a longitudinal axial flow ratooned rice combine harvester. Background technique [0002] Raising rice is a kind of rice variety that uses the dormant buds that survived on the rice pile after harvesting to make it mature again. Compared with traditional rice, it has many advantages. In recent years, the yield of rice has reached a bottleneck, and planting ratooning rice can effectively improve Multiple cropping index to increase rice yield. When harvesting the first season rice, the stems and leaves of the crops are green and the water content is high; in order to ensure that the rice piles can head again in the second season, the agronomic requirements of high stubble retention are required when the ratooning rice is harvested in the first season; The rolling of the last r...

AI Technical Summary

Problems solved by technology

In this way, the light debris, short stems and stem leaves need to be thrown out through the cylinder screen, which increases the rated power of the cylinder screen; The stalks and leaves are blown out of the casing, and the utilization rate of the fan is not high

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