公开(公告)号：US20150308446A1

公开(公告)日：2015-10-29

申请号：US14680212

申请日：2015-04-07

申请人： c/o Sulzer Management AG

发明人： Matti KOIVIKKO ,  Kalle TIITINEN ,  Sami VIRTANEN ,  Jussi AHLROTH

IPC分类号： F04D29/24 ,  F04D29/44 ,  F04D1/00

CPC分类号： F04D29/2216 ,  F04D7/04 ,  F04D29/2266 ,  F04D31/00

摘要： An impeller for a centrifugal pump, the impeller includes a front shroud, a rear shroud, and one or more working vanes therebetween, the front shroud having a front face opposite to the face having the working vanes, the rear shroud having a rear face opposite to the face having the working vanes, the front shroud having an outer circumference and a plurality of front pump-out vanes attached to the front face of the front shroud, the rear shroud having a plurality of rear pump-out vanes attached to the rear face of the rear shroud, the front pump-out vanes being dimensioned in accordance with an equation: Σi=1z(li)/D>8, where Z is the number of front pump-out vanes, l is the vane length measured along the leading surface of each front pump-out vane, D is the outer diameter of the front shroud.

摘要翻译： 一种用于离心泵的叶轮，所述叶轮包括前护罩，后护罩和其间的一个或多个工作叶片，所述前护罩具有与具有所述工作叶片的面相对的前表面，所述后护罩具有相对的后表面 在具有工作叶片的表面上，前护罩具有外周和附接到前护罩前表面的多个前泵出叶片，后护罩具有附接到后护罩的多个后抽出叶片 前排水叶片的尺寸根据以下等式确定：＆Sgr; i = 1z（li）/ D> 8，其中Z是前泵出叶片的数量，l是叶片长度 沿着每个前排出叶片的前表面测量，D是前护罩的外径。

公开(公告)号：US20190063450A1

公开(公告)日：2019-02-28

申请号：US16081471

申请日：2017-03-06

申请人： Sulzer Management AG

发明人： Matti KOIVIKKO ,  Kalle TIITINEN ,  Hannu HEISKANEN ,  Teemu GASMAN

IPC分类号： F04D29/041 ,  F04D29/047 ,  F04D29/22

摘要： A single-stage or multi-stage centrifugal pump has a balancing disc for balancing the axial forces of the pump. The balancing disc includes at least one annular groove in at least one of the non-axial counter surfaces and of the balancing disc and the counter member.

公开(公告)号：US20170218970A1

公开(公告)日：2017-08-03

申请号：US15500834

申请日：2015-07-06

申请人： Sulzer Management AG

发明人： Jussi AHLROTH ,  Teemu GASMAN ,  Matti KOIVIKKO ,  Kalle TIITINEN ,  Sami VIRTANEN

IPC分类号： F04D29/22 ,  F04D29/42 ,  F04D29/10 ,  F04D29/24

CPC分类号： F04D29/2266 ,  F04D29/106 ,  F04D29/24 ,  F04D29/4293

摘要： An impeller for a centrifugal pump includes a hub, a shroud extending outwardly from the hub and dividing the impeller into front and rear sides, a working vane on a first face of the hub and the shroud at the front side, a rear vane on a second face of the shroud at the rear side, and a balancing conduit extending through the hub from a first opening at the first face to a second opening at the rear side of the impeller. The first opening is disposed closer to the axis than the second opening, and the first opening is located within a circle formed by a radially innermost part of the working vane, while the impeller is rotated about the axis, and the second opening or the balancing conduit at the rear side of the impeller is located at a smallest diameter of the shroud.