Axial flow fan, has bevel pinion arranged at spars of moving blades and engaged with bevel gears and planetary gears on adjustable drive shaft, where restoring moment of moving blades is partially compensated by balance weights

摘要

The fan has moving blades (11) comprising an aerofoil, where orientation of the moving blades is adjustable on a running wheel hub (10). The moving blades are rotatable around a longitudinal axis and supported over spars (12) at the running wheel hub. A bevel pinion (13) is arranged at the spars of the moving blades. The bevel pinion is engaged with bevel gears (14) and planetary gears on an adjustable drive shaft (15), where restoring moment of the moving blades is partially compensated by balance weights (25).