Screening device with at least one suction nozzle

A self-propelling harvester comprising:

• a drive unit;
• a screening device;
• a vacuum source;
• and
• a cooling device assigned to the drive unit and comprising a suction fan configured to draw an airflow through the screening device;
• wherein the screening device comprises:
• a screen;
• at least one suction nozzle that has an elongated hollow body with at least one suction opening which extends sectionally in a longitudinal direction and in a transverse direction of the hollow body;
• and
• at least one air duct connecting an interior of the hollow body to a connection positioned in or on the hollow body, with the connection connected to the vacuum source;
• wherein the connection is positioned facing the screen of the screening device;
• wherein the at least one air duct has a cross-sectional shape that increases in a vertical direction toward the connection starting from an outer end of the at least one suction nozzle;
• wherein an inner contour facing the at least one suction opening of the at least one air duct has a contour substantially corresponding to an airfoil;
• and
• wherein the inner contour of the at least one air duct has a first region, starting from the connection, with a sectionally convex shape that transitions into a second region with a sectionally concave shape, and transitions into a third region with a convex shape toward an outer end of the hollow body.