Blower for combine harvesters having a separation unit

摘要

A self-propelled combine harvester includes a separation unit having at least one rotor housing, a sieve mechanism with sieve openings and a rotor rotatably mounted therein. A grain collecting element is arranged adjacent the sieve mechanism. A cleaning apparatus receives the grain kernels collected from the grain collecting element. A sucking blower unit generates a sucking air flow stream. The sucking blower unit draws an air stream in an upward direction through a conduit which guides the air flow stream from a space between the rotor housing of the separation unit and the grain collecting element around a front wall of the housing of the separation unit towards the sucking blower unit. A second discharge location for chaff and broken straw draws the chaff and the broken straw from under the separation unit through the conduit via the sucking blower unit. The mixture of the air, the chaff and the broken straw is directed to the ground or into a chopper via a collection duct.