FIELD: agriculture.
SUBSTANCE: invention relates to agricultural machinery industry. The grain combine harvester comprises a cleaning fan and a sieve boot. The cleaning fan comprises at least one impeller mounted in a housing with the ability to rotate. An air channel extends from the housing, which is limited by a wall with a convex curved inner surface. The wall forms the lower side of the air channel that extends into the sieve boot. The edge facing the air channel of at least one sieve located in the sieve boot separates the air flow passing in the channel into parts. Part of the flow passes over the edge of the sieve, and the other part of the flow passes below the edge.
EFFECT: cleaning fan provides a good blowing of sieves and contributes to the effective separation along the length of the sieves.
9 cl, 3 dwg
| Title | Year | Author | Number |
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