公开(公告)号：US11067086B2

公开(公告)日：2021-07-20

申请号：US15586501

申请日：2017-05-04

Applicant: GRUNDFOS HOLDING A/S

Inventor： Janus Lukas Sierakowski-Larsen ,  Ejgil Koustrup

IPC: F04D9/02 ,  F04D9/00 ,  F04D15/00 ,  F04D13/16 ,  F04D1/06 ,  F16K7/17

Abstract: A centrifugal pump (7), with one or more pumping stages, includes a pressure controlled valve (15) inside the pump (7) for supporting self-priming, the pressure controlled valve (15). The pressure controlled valve (15) includes a pretensioned leaf spring (17) and a valve seat (18). The leaf spring (17) has an opened position and a closed position. In the open position the leaf spring (17) is distanced from the valve seat (18). In the closed position the leaf spring (17) closes the valve seat (18). The leaf spring (17) and valve seat (18) are arranged for soft closing.

公开(公告)号：US10400792B2

公开(公告)日：2019-09-03

申请号：US15294020

申请日：2016-10-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Janus Lukas Sierakowski-Larsen

IPC: F04D1/06 ,  F04D13/06 ,  F04D29/42 ,  F04D29/44 ,  F04D29/58

Abstract: A water supply system (1) includes an electric motor (8) and a centrifugal pump (7) which is driven by the electric motor (8) and with at least one impeller (10) which produces a main delivery flow (29) through an annular space (12) as well as a cooling fluid delivery flow (30) through a space (28) surrounding the motor (8). The annular space (12) is divided by two guide vanes into part-annular-spaces (23, 24) which have a different pressure level on operation. Each part-annular-space (23, 24) is conductively connected to the space (28) which surrounds the motor (8) and through which the cooling fluid runs (FIG. 5).

公开(公告)号：US10533674B2

公开(公告)日：2020-01-14

申请号：US15293942

申请日：2016-10-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Janus Lukas Sierakowski-Larsen

IPC: F16K27/02 ,  F04D29/42 ,  F04D13/06 ,  F04D13/16 ,  F04D15/00 ,  F16K15/06 ,  F04D1/06 ,  F04D29/62

Abstract: A non-return valve (19) for a water supply system (1) or a pump (4) is integrated in a flow channel (14) of the water supply system (1). The non-return valve (19) includes a sealing body (21) which is mounted within the channel (14), blocks the channel (14) in a first position forming the closure position and releases the channel (14) in a second position forming the opened position. The sealing body (21) is movably arranged on a holder (31) which includes a closure body (15), with which the holder (31) is releasably fastened in a housing opening.

公开(公告)号：US11555553B2

公开(公告)日：2023-01-17

申请号：US16704479

申请日：2019-12-05

Applicant: GRUNDFOS HOLDING A/S

Inventor： Janus Lukas Sierakowski-Larsen

IPC: F16K27/02 ,  F04D29/42 ,  F04D13/06 ,  F16K15/06 ,  F04D13/16 ,  F04D15/00 ,  F04D1/06 ,  F04D29/62

Abstract: A non-return valve (19) for a water supply system (1) or a pump (4) is integrated in a flow channel (14) of the water supply system (1). The non-return valve (19) includes a sealing body (21) which is mounted within the channel (14), blocks the channel (14) in a first position forming the closure position and releases the channel (14) in a second position forming the opened position. The sealing body (21) is movably arranged on a holder (31) which includes a closure body (15), with which the holder (31) is releasably fastened in a housing opening.