公开(公告)号：US20130164136A1

公开(公告)日：2013-06-27

申请号：US13723678

申请日：2012-12-21

Applicant: Grundfos Holding a/s

Inventor： Jens VESTERGAARD BOLL

IPC: F04D29/22

CPC classification number: F04D29/2222 ,  B29C65/1635 ,  F04D29/2227 ,  F04D29/628 ,  F05D2230/234 ,  F05D2300/43 ,  F05D2300/52

Abstract: An impeller (2) for a centrifugal pump includes a first shroud having a plurality of blades (8). A second shroud is joined onto the first shroud by way of welding. Each blade (8) has an apex region (12), at which the blade contacts the second shroud. At least one of the blades (8) in a first section (20) of the apex region (12) has a weld connection to the second shroud, and in at least one second section (14) of the apex region (12) is free of a weld connection.

Abstract translation: 用于离心泵的叶轮（2）包括具有多个叶片（8）的第一护罩。 通过焊接将第二护罩连接到第一护罩上。 每个叶片（8）具有顶点区域（12），刀片在该顶点区域接触第二护罩。 顶点区域（12）的第一部分（20）中的至少一个叶片（8）具有与第二护罩的焊接连接，并且在顶点区域（12）的至少一个第二部分（14）中是 没有焊接连接。