| 摘要 |
PCT No. PCT/DK89/00140 Sec. 371 Date Oct. 16, 1990 Sec. 102(e) Date Oct. 16, 1990 PCT Filed Jun. 6, 1989 PCT Pub. No. WO89/12172 PCT Pub. Date Dec. 14, 1989.An impeller for an axial flow fan having adjustable veins which are suspended in a rigid supporting ring. The ring is centered and fastened by radial supporting plates which comprise at their periphery circumferential collar elements which engage with recesses on opposite sides of supporting ring. The supporting plates are connected with the supporting rings using bolts and are connected to each other by a spacer element. The spacer element also forms a slide guide for an axially movably adjusting disk. The veins are suspended in the supporting ring so that they may be individually adjusted.
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