| 摘要 |
PROBLEM TO BE SOLVED: To change the separation air flow rate fed to the upper and the lower sides of a chaff sieve and to improve separation performances of the chaff sieve. SOLUTION: A combine harvester is equipped with a shaking separation board arranged through a receiving net under a threshing cylinder, a winnower fan installed under the front side of the shaking separation board, a feed pan, the chaff sieve and a grain sieve installed in the shaking separation board. The combine harvester is characterized in that a flow dividing valve is installed on the front side of the chaff sieve and the winnower fan is composed so as to freely regulate the separation air flow rate of the winnower fan for dividing the air flow to the upper and the lower sides of the chaff sieve. COPYRIGHT: (C)2005,JPO&NCIPI
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