Fan assembly for vehicles

摘要

A fan assembly comprising, a shroud having a through opening, around which the shroud defines an air conveying ring, a motor-fan assembly which includes an axial fan rotatable with respect to the support about an axis of rotation, and a noise-reducing annular structure, having a plurality of projections which are arranged in succession in a circumferential direction and extend radially towards the axis of rotation of the fan, each projection having a face which is directed towards the axis of rotation and is substantially parallel thereto, and a plurality of portions radially recessed towards the air conveying ring. Each of the recessed portions has a face which is directed towards the axis of rotation of the fan and the profile of which in the axial direction is generally curvilinear and not parallel to the axis of rotation.

主权项

1. A fan assembly for cooling a radiator, a radiator-condenser assembly, or a radiator-condenser-intercooler assembly of a vehicle, comprising:
a shroud, having a through opening around which said shroud defines an air conveying ring, and a support which is located at a centre of said opening, a motor-fan assembly carried by said support, which includes an axial fan rotatable with respect to said support about an axis of rotation, and a noise reducing ring structure, fixed with respect to the air conveying ring and surrounding said fan, said ring structure having a plurality of projections that follow one another in a circumferential direction and extend radially toward the axis of rotation of the fan, each projection having a face bounded by side edges in the circumferential direction, which faces toward said axis of rotation and is substantially parallel thereto, and a plurality of recessed portions radially recessed toward the air conveying ring and alternated with said projections, wherein each of said recessed portions has a face facing toward the axis of rotation of the fan, whose profile in an axial direction is generally curvilinear and unparallel to said axis of rotation, and wherein said ring structure comprises a plurality of quadrilateral prism formations which follow one another in the circumferential direction, each prism formation extending in the axial direction from a bottom wall of the air conveying ring, and in radial direction from a side wall of the air conveying ring, and a collar formation extending circumferentially along the air conveying ring and having a substantially triangular cross section, and divided into collar portions interconnecting the prism formations, wherein said prism formations constitute said projections and said collar portions constitute said recessed portions.