Patent ID: 9074611
Filing Date: 2015-07-07
Classification: F04D

Abstract:
1. A wall ring for an axial fan comprising a supporting frame ( 1 ), on which a circular connecting piece ( 2 ) is formed, with the axial fan arranged therein, the supporting frame ( 1 ) is assembled from a plurality of frame elements ( 6 ) by first form and force-fitting connecting elements ( 11 , 12 , 35 , 36 ), and the circular connecting piece ( 2 ) is formed of a plurality of circular segments ( 22 ) arranged circumferentially one after the other, the circular segments being connected to each other and with the supporting frame ( 1 ) by second form and force-fitting, or material-bonded connections, or by second connecting elements ( 25 , 26 , 35 , 36 ), wherein the frame elements ( 6 ) have an arched circular boundary edge ( 9 ) with a plurality of the first connecting elements in the form of locking lugs ( 11 ) running vertically to a surface of the frame elements, the locking lugs ( 11 ) interacting with adapted locking receiving members ( 12 ) on the circular connecting piece ( 2 ).