| 摘要 |
PROBLEM TO BE SOLVED: To improve separation performances of a threshing separator. SOLUTION: The threshing separator such as a combine harvester is equipped with a blowoff fan 25 installed in the front lower part in the interior of a threshing separation chamber (a) formed into a hermetically closed space and a suction fan 10 provided at the upper rear of the blowoff fan 25 and a shaking separation board 7 arranged between the blowoff fan 25 and the suction fan 10. The threshing separator is composed as follows. The direction of a wind delivery port 25b of the blowoff fan 25 and a separation surface of a cleaning and grading grain sieve 12 of the shaking separation board 7 are arranged parallel to a virtual straight line 28 of a somewhat rising tilt form which is obtained by connecting the rotation center O2 of rotating blades 25a of the blowoff fan 25 to the rotation center O1 of the rotation blades 10c of the suction fan 10. Furthermore, the cleaning and grading grain sieve 12 is located in the nearly intermediate position between virtual extension surfaces 26a and 27a of an upper guide surface 26 and a lower guide surface 27 of the wind delivery port 25b. COPYRIGHT: (C)2004,JPO&NCIPI
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