Pressure and current reducing impeller

Details Pressure and current reducing impeller Pressure and current reducing impeller

2006-01-11

2008-09-16

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Cross flow runner

C415S055100, C415S055200, C416S22300B, C416S228000

Reexamination Certificate

active

07425113

ABSTRACT:
A secondary air system providing a regeneration air pump wherein the vanes of the impeller are tapered from a point along the length of the vane to the root of the vane inside the air pump. The tapered vanes create desirable flow characteristics. The tapered vanes create a non-linear flow versus pressure characteristic. Thus, the tapered vanes in combination with a divider that extends circumferentially around the impeller and through the vanes causes the flow to increase. This non-linear characteristic created by the tapered vanes allows the secondary air system to maintain suitable operation at lower flow and pressure levels. Due to the tapered feature on the impeller, a dead head pressure is obtained at a lower pressure. The impeller arrangement also provides overall pump efficiency improvements.

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