| 摘要 |
PROBLEM TO BE SOLVED: To obtain a grain separator with which the quantity of air to be fed to a primary separation section is kept free of insufficiency by a simple structure, the air quantity distribution thereof may be made uniform and the quantity of the air to be fed to a secondary separation section is unaffected by a change in the ventilation resistance to the primary separation section. SOLUTION: A main blower 28 in the primary separation section 12 and a sub-blower 54 of the secondary separation section 14 of the grain separator 10 are connected by the same shaft 30 and further, a communication port 52 for communicating both is formed at a partition plate 50. Further, the sub- blower 54 is integrally provided with a guide cylindrical 60 for guiding the inhalation from a sub-inhalation port 58 to the communication port 52 and even more, the sub-inhalation port 58 is formed larger than the guide cylindrical 60. As a result, the main blower 28 functions substantially as a 'bi-inhalation system' and prevents the lack of the air quantity and the nonuniform distribution of the air quantity.
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