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公开(公告)号:US20080080973A1
公开(公告)日:2008-04-03
申请号:US11580158
申请日:2006-10-13
IPC分类号: F01D9/00
CPC分类号: F04D29/2277 , F04D29/448
摘要: The invention relates to a suction stage (12) for a pump (10) with centrifugal wheel, the suction stage (12) comprising a rotational impeller (18) equipped with a hub (20) and arranged upstream of the centrifugal wheel (14), the suction stage (12) further comprising a diffuser (34) arranged between the impeller (18) and the centrifugal wheel (14), the diffuser (34) comprising a plurality of blades (36).The invention is characterised by the fact that the hub (20) has a downstream surface (20b) extending axially so as to converge toward the centrifugal wheel, and in that the blades (36) of the diffuser (34) have free ends, said blades protruding radially toward said downstream surface in such a way that the free ends of the blades make said downstream surface (20b) flush.
摘要翻译: 本发明涉及一种用于具有离心轮的泵(10)的抽吸级(12),所述抽吸级(12)包括配备有毂(20)并且布置在所述离心轮(14)上游的旋转叶轮(18) 所述吸入台还包括布置在所述叶轮(18)和所述离心轮(14)之间的扩散器(34),所述扩散器(34)包括多个叶片(36)。 本发明的特征在于,毂(20)具有轴向延伸以朝向离心轮会聚的下游表面(20b),并且扩散器(34)的叶片(36)具有自由端, 所述叶片朝向所述下游表面径向突出,使得叶片的自由端使所述下游表面(20b)齐平。