Radial blowing device for a cleaning arrangement of a harvester thresher

A radial blowing device for a harvester thresher cleaning arrangement having an upper sieve, a lower sieve and a guiding bottom, the device comprising at least two blowers each including a double impeller with two sets of blades;

• at least two wind passage means each forming a wind passage which extends from each of said double impellers, each of said wind passage means including two side walls laterally bounding a respective one of said passages;
• at least two subdividing means each subdividing a respective one of said wind passages into two half passages, so that each of the half passages of each of said wind passages communicates with a respective one of said sets of blades of a respective one of said double impellers, and each of said subdividing means extends up to the double impeller of a respective one of said blowers, each of said subdividing means including a partition located between the side walls of a respective one of said wind passage means and subdividing a respective one of said wind passages into two half passages;
• and extension means forming an extension of each of said half passages and operative for guiding air further from the latter, said extension means including a plurality of air guiding baffles forming extensions of said side walls and said partitions.

A radial blowing device for a harvester thresher cleaning arrangement having an upper sieve, a lower sieve and a guiding bottom, the device comprising at least two blowers each including a double impeller with two sets of blades;

• at least two wind passage means each forming a wind passage which extends from each of said double impellers;
• at least two subdividing means each subdividing a respective one of said wind passages into two half passages each having an outlet end, so that each of the half passages of each of said wind passages communicates with a respective one of said sets of blades of a respective one of said double impellers, and each of said subdividing means extends up to the double impeller of a respective one of said blowers;
• and means for guiding air from a respective one of said half passages selectively into the region above the upper sieve or into the region above the lower sieve, each of said air guiding means being arranged at the outlet end of a respective one of said half passages and includes two flaps movable between a first position in which they allow air to travel into the first-mentioned region, and a second position in which they allow air to travel into the second-mentioned region.