| 摘要 |
The invention is directed towards a flow-guiding apparatus, equipped with several guide blades, for centrifugal pumps which have to deliver liquids containing admixtures. A flow-guiding apparatus (7) working free of obstruction and in a low-loss manner is characterised according to the invention by the combination of the following features which applies to each guide blade (8): a) the guide-blade nose (10) is well rounded off, the ratio of the rounding-off radius (r) to the width (b) of the guide blade (8) in the inlet area of the flow-guiding apparatus (7) being 0.15 to 0.5; b) the setting angle ( alpha s) of the guide blade (8) in the inlet area of the flow-guiding apparatus (7) corresponds to the direction of the tangent (11) to the path curve (12) of a fluid particle in the delivery liquid; c) the pressure side (13) of the guide blade (8) is set steeper than the suction side (14) by such an amount that the liquid always flows against the guide blade (8) in partial load. <IMAGE> |
