The main elements of a true mixed flow fan are seen by reference to Figures 1.97 and 1.98, similar to a vee belt driven vane axial or in-line radial. The major difference is in the impeller, which is generally of fabricated construction. Both the front shroud and backplate are at an angle, so that the air follows a
Figure 1.97 Typical belt driven mixed flow fan
Designed blades guide vanes
Path somewhere between axial and centrifugal flow. It will be noted that the casing is just slightly larger than the impeller outside diameter.
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