公开(公告)号：US10167874B2

公开(公告)日：2019-01-01

申请号：US14906712

申请日：2014-07-11

Applicant: SNECMA

Inventor： François Danguy ,  Jean-Michel Nguyen Duc ,  Laurent Fabbri ,  Cëdric Sene

IPC: F04D29/08 ,  F02K9/48 ,  F01D25/18 ,  F01D25/16 ,  F01D3/04 ,  F04D29/22 ,  F04D29/043 ,  F04D29/046 ,  F04D1/00 ,  F04D29/42 ,  F01D5/02 ,  F02K9/46 ,  F04D7/02 ,  F04D13/04 ,  F04D29/041 ,  F04D29/10

Abstract: The invention relates to the field of centrifugal pumps, and in particular it relates to a centrifugal pump (303, 403) comprising at least: an impeller (303a, 403a); a rotary shaft (302, 402) secured to said impeller (303a, 403a); a casing (320, 420) having an axial admission passage (325, 425); at least one first bearing (305, 405) supporting said rotary shaft (302, 402) in said casing (320, 420); and at least one dynamic seal (311, 411) around the rotary shaft (302, 402), the impeller (303a, 403a) being situated between the at least one dynamic seal (311, 411) and the axial admission passage (325, 425) of the pump (303, 403). The centrifugal pump (303, 403) also comprises, between the impeller (303a, 403a) and at least one dynamic seal (311, 411), an axial force compensation disk (330, 430) secured to the shaft (302, 402) and presenting a diameter greater than 70% of a diameter of the impeller (303a, 403a). A front face (330a, 430a) of the disk (330, 430) faces towards the impeller (303a, 403a) and is connected to a branch connection for fluid under pressure taken downstream from the pump (303, 403), and a rear face (330b, 430b) faces towards the dynamic seals (311, 411) and presents fins (330c, 430c) that are oriented radially, at least in part.