| 摘要 |
The grain cleaner comprises a pair of rotating concentric, coaxial screens. Grain is delivered to the inner screen which has a mesh large enough to pass the grain and light impurities, such as chaff, but too small to pass large, heavy impurities such as straw. Baffles move the retained straw toward an exit at one end of the inner cyclinder for collection and disposal. A current of air blowing in the space between the two cylinders separates the grain from the chaff and dust and carries the latter to an exit. Baffles in the outer cylinder move the cleaned grain in a direction opposite to the flow of air for discharge and collection.
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