FIELD: manufacture of fans, mainly centrifugal fans. SUBSTANCE: fan has impeller with short and elongated blades whose outlet edges are located at one diameters; short blade and outer portion of elongated blade are bent forward; inner portion of each elongated blade is inclined backward; besides that, inner portion of each elongated blade is thickened on backward side forming wing-shaped profile; relationship of profile thickness to length along chord ranges from 0.7 to 0.2. EFFECT: enhanced reliability. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2050474C1 |
| 0 |
|
SU254708A1 | |
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