公开(公告)号：EP3025061A2

公开(公告)日：2016-06-01

申请号：EP14790135.9

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.