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2. 发明申请

WO2015011366A3 CENTRIFUGAL PUMP, IN PARTICULAR FOR SUPPLYING POWER TO ROCKET ENGINES 审中-公开
标题翻译：离心泵，特别是向火箭发动机提供动力
公开(公告)号：WO2015011366A3
公开(公告)日：2015-03-26
申请号：PCT/FR2014051799
申请日：2014-07-11
申请人： SNECMA
发明人： DANGUY FRANÇOIS , NGUYEN DUC JEAN-MICHEL , FABBRI LAURENT , SENE CÉDRIC
IPC分类号： F04D7/02 , F04D13/04 , F04D29/041
CPC分类号： F04D29/086 , F01D3/04 , F01D5/02 , F01D25/16 , F01D25/183 , F02K9/46 , F02K9/48 , F04D1/00 , F04D7/02 , F04D13/043 , F04D29/0413 , F04D29/043 , F04D29/046 , F04D29/108 , F04D29/22 , F04D29/426 , F05D2220/80 , F05D2240/53
摘要： The invention relates to the field of centrifugal pumps, and in particular to a centrifugal pump (303, 403) including at least one impeller (303a, 403a), a rotatable shaft (302, 402) that is rigidly connected to said impeller (303a, 403a), a housing (320, 420) having an axial intake passage (325, 425), at least one first bearing (305, 405) supporting said rotatable shaft (302, 402) in said housing (320, 420), and at least one dynamic seal (311, 411) around the rotatable shaft (302, 402), the impeller (303a, 403a) being located between the at least one dynamic seal (311, 411) and the axial intake passage (325, 425) of the pump (303, 403). Said centrifugal pump (303, 403) also includes, between the impeller (303a, 403a) and the at least one dynamic seal (311, 411), an axial force compensation disk (330,430), rigidly connected to the shaft (302, 402), and having a diameter larger than 70 % of the diameter of the impeller (303a, 403a). A front surface (330a, 430a) of said disk (330, 430) faces the impeller (303a, 403a) and is connected to a bypass for pressurized fluid taken downstream of the pump (303, 403), and a rear surface (330b, 430b) faces the dynamic seals (311, 411) and has blades (330c, 430c) having a pitch that is least partially radial.
摘要翻译：本发明涉及离心泵领域，尤其涉及包括至少一个叶轮（303a，403a），刚性连接到所述叶轮（303a，403a）的可旋转轴（302,402）的离心泵（303,403），具有轴向进气通道（325,425）的壳体（320,420），支撑所述壳体（320,420）中的所述可旋转轴（302,402）的至少一个第一轴承（305,405）和围绕所述可旋转轴（302,402）的至少一个动态密封件（311,411），所述叶轮（303a，403a）位于所述至少一个动态密封件（311,411）和所述轴向进气通道（303,403）的流量（425）。所述离心泵（303,403）在所述叶轮（303a，403a）和所述至少一个动态密封件（311,411）之间还包括轴向力补偿盘（330,430），所述轴向力补偿盘刚性地连接到所述轴（302,402）），且其直径大于叶轮（303a，403a）的直径的70％。所述盘（330,430）的前表面（330a，430a）面对叶轮（303a，403a）并且连接到泵（303,403）下游的加压流体的旁路和后表面（330b ，430b）面向所述动态密封件（311,411）并且具有叶片（330c，430c），所述叶片具有至少部分径向的节距。

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