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    • 3. 发明申请
    • PRESSURE AND CURRENT REDUCING IMPELLER
    • 压力和电流减少叶轮
    • WO2007082009A2
    • 2007-07-19
    • PCT/US2007000676
    • 2007-01-11
    • BORGWARNER INCPETERSON TODDADHVARYU KETANJARAMILLO RAMON
    • PETERSON TODDADHVARYU KETANJARAMILLO RAMON
    • F04D29/188
    • 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.
    • 提供再生空气泵的二次空气系统,其中叶轮的叶片从空气泵的叶片长度的一点到叶片的根部成锥形。 锥形叶片产生理想的流动特性。 锥形叶片产生非线性流动与压力特性。 因此,锥形叶片与围绕叶轮周向延伸并通过叶片的分隔器组合导致流动增加。 由锥形叶片产生的这种非线性特性允许二次空气系统在较低的流量和压力水平下保持合适的操作。 由于叶轮上的锥形特征,在较低压力下获得死头压力。 叶轮装置还提供了整体泵效率的改进。