公开(公告)号：US20130294910A1

公开(公告)日：2013-11-07

申请号：US13886479

申请日：2013-05-03

Applicant: GRUNDFOS HOLDING A/S

Inventor： Benny Fredslund HANSEN ,  Poul Johannes HENNING

IPC: F04D29/10

CPC classification number: F04D29/106 ,  F04D7/045 ,  F04D29/167

Abstract: A waste water pump includes an impeller (10) having a suction port (12) with a sealing surface (14) which annularly surrounds this and which bears on a stationary seal (18). At least one groove (28) is formed in the sealing surface (14) and to both sides extends beyond a bearing-contact region of the stationary seal (18) on the sealing surface (14). The stationary seal (18) having a first end (30) in connection with an impeller side chamber (20) and an opposite second end (32) is in connection with the suction side of the impeller (10). The pump also includes means (34) for producing turbulences arranged in the impeller side chamber (20) adjacent the seal (18).

Abstract translation: 废水泵包括具有吸入口（12）的叶轮（10），所述吸入口具有密封表面（14），所述密封表面围绕着所述密封表面（14），所述密封表面围绕着所述密封表面并固定在固定密封件上。 至少一个凹槽（28）形成在密封表面（14）中并且两侧延伸超过密封表面（14）上的固定密封件（18）的支承接触区域。 具有与叶轮侧室（20）和相对的第二端（32）连接的第一端（30）的固定密封件（18）与叶轮（10）的吸入侧连接。 泵还包括用于产生布置在邻近密封件（18）的叶轮侧室（20）中的湍流的装置（34）。

公开(公告)号：US20180106264A1

公开(公告)日：2018-04-19

申请号：US15782070

申请日：2017-10-12

Applicant: GRUNDFOS HOLDING A/S

Inventor： Poul Johannes HENNING

IPC: F04D29/08 ,  F04D29/16

CPC classification number: F04D29/086 ,  F04D7/045 ,  F04D11/005 ,  F04D29/165 ,  F04D29/167 ,  F04D29/2266 ,  F04D29/4273 ,  F04D29/4293 ,  F05D2250/51

Abstract: A waste water pump includes an impeller (12) and a surrounding pump housing (4), wherein an impeller side chamber (20) is formed between the impeller (12) and the pump housing (4). The impeller side chamber (20) has a first seal (16) between the impeller (12) and the pump housing (4), towards the intake side (32) of the impeller (12), and a second seal (18) between the impeller (12) and the pump housing (4), towards the pressure side (14) of the impeller (12). The first seal (16) is provided with a conveying device (28, 30) configured to convey debris from the impeller side chamber (20) to the intake side (32) of the impeller (12). The second seal (18) is provided with conveying device (38, 40) configured to convey debris from the side chamber (20) to the pressure side (14) of the impeller (12).