Fan wheel, system and transmission series

摘要

Transmission,comprising a fan witha fan wheel with fan blades and air guide ringand a fan shroud,the fan shroud at least partially surrounds the fan wheeland the fan shroud has a region with axial air inlets,the fan blade perpendicular to a frustoconical base body areand in each case have a plane of symmetry, which contains the axis of rotation of the fan wheel, so that, independently of the direction of rotation of the fan wheel in the same axial direction is sucked in,characterized in thatthe ventilator blades in a first partial region of the region with axial air inlets a constant distance from the fan shroud have,in that, in a second partial region of the region with axial air inlets of the distance of the fan blades of the fan shroud is greater than the constant distance in the first partial region is, in particular more than twice as large,that the second partial region of the region with axial air inlets radially within the first segment of the region is arranged with axial air inlets,that the radial expanse of the base body is smaller than the outside diameter of the fan wheel,that the air guide ring has a constant wall thickness, and on its inner side forms a convex surface,that the support edges facing the transmission of the fan blades and a support ring of the base body in a common plane,that the air guide ring in an axial distance from the by the support ring of the base body and ends, in such a plane defined radial openings is formed, through which during operation, air in the radial direction along a wall of the housing of the transmission can be conducted,that the fan blade irregularly in the circumferential direction are spaced apart from all the fan blades and that the center of gravity, which is formed in the center of the fan is.