公开(公告)号：US10823175B2

公开(公告)日：2020-11-03

申请号：US15767500

申请日：2016-10-10

Applicant: GRUNDFOS HOLDING A/S

Inventor： Thomas Blad ,  Peter Mønster

IPC: F04D15/00 ,  F04D29/42 ,  F04D29/48 ,  F24D3/02 ,  F24D3/10 ,  F16K11/048

Abstract: A pump assembly includes an impeller (18), which for rotation is connected to an electrical drive motor (20) which can be driven in two rotation directions (A, B) and a valve (10) situated in an inlet of the pump assembly. The valve includes a valve element (48) movable between at least two switch positions and is connected for movement to a drive element (36, 60) subjected to the flow produced by the impeller (18). The valve element (48), in at least a first of the two switch positions, closes an inlet channel (44, 46) of the pump assembly (12) and is arranged such that the movement direction into this first switch position corresponds to the flow direction (S1, S2) through this inlet channel (44, 46). A hydraulic system is provided with two circuits and such a pump assembly. The valve serves as a switch-over valve between the two circuits.

公开(公告)号：US10816002B2

公开(公告)日：2020-10-27

申请号：US15776130

申请日：2016-11-16

Applicant: Grundfos Holding A/S

Inventor： Flemming Buus Bendixen ,  Alan Ivo Sogaard Sorensen

IPC: F04D13/02 ,  F04D7/06 ,  F04D13/06 ,  H02K49/10

Abstract: The present invention relates to a pump unit (300), with at least one impeller, comprising a coupling, wherein the coupling is mechanically connected to the at least one impeller via an inner rotor and where an outer rotor is connected to an electrical machine arranged to produce a rotational torque, said pump being arranged to circulate a hot fluid by the impeller. The coupling includes an outer rotor including a plurality of permanent magnets (101,201) arranged to form a plurality of magnetic poles (105, 205), and an inner rotor (110, 210), whereby the outer rotor and the inner rotor are located coaxially to one another around an axis (130, 230) and spaced apart from one another by an air gap (150,250). A rotor can (330) is arranged in the air gap (250, 150) between the inner rotor and the outer rotor, so as to make a dividing section between the inner and outer rotor. Each of the plurality of magnetic poles comprises at least a section with a radial magnetic direction in respect of the axis (130, 230) and at least a section with a magnetic direction angled between a radial direction and a tangential direction in respect of the axis (130, 230), wherein the combined length of the sides of the plurality of permanent magnets cover less than 75% of the circumference of the cylindrical structure. The outer rotor has a cylindrical structure (120, 220) surrounding the plurality of magnetic poles (105, 205), and the cylindrical structure is made of a magnetic susceptible material for conducting a magnetic flux between the plurality of magnetic poles (105, 205) The inner rotor (110, 210) is made of a magnetic susceptible material and free from permanent magnetic material, wherein the inner rotor is formed with multiple radial projections (111, 211) acting as salient inner rotor poles distributed around the axis (130, 230) of the inner rotor. The invention also relates to a coupling with the above mentioned coupling features.

公开(公告)号：US10808703B2

公开(公告)日：2020-10-20

申请号：US16060215

申请日：2016-12-07

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen Mikkelsen ,  Niels Due Jensen ,  Brian Lundsted Poulsen

IPC: F04D1/06 ,  F04D29/42 ,  F04D29/62

Abstract: A multistage centrifugal pump has a foot part (2) and a head part (9), between which pump stages are integrated. The head part (9) and the foot part (2) are connected via tie-rods (11) which with one end are fastened on the head part (9) and with the other end are fastened on the foot part (2). The tie-rods (11) at one end comprise a thread (14), with which they are tightened on the head part (9). The tie-rods (11) are formed from sheet metal. At the end opposite the thread, the tie-rods include a recess, with which recess the tie-rods are each positively fixed on the foot part (2), at least in the tensile direction (22).

公开(公告)号：US10686346B2

公开(公告)日：2020-06-16

申请号：US14377057

申请日：2013-01-11

Applicant: GRUNDFOS HOLDING A/S

Inventor： John B. Jacobsen ,  Jens Peter Krog

IPC: H02K5/10 ,  H02K11/33 ,  H02K7/14 ,  H02K11/00 ,  F01D25/32 ,  F04D1/00 ,  F04D13/06 ,  F04D29/54 ,  F04D19/00 ,  F04D25/06 ,  F04D29/32 ,  F04D29/40 ,  H02K5/22

Abstract: A pump assembly has at least one electronics receiving space (54; 54; 54″). The electronics receiving space (54; 54; 54″) includes at least one defined ventilation opening (40; 40; 40″). The ventilation opening (40; 40; 40″), at an outer side of the electronics receiving space (54; 54; 54″), runs out into an air duct (41; 41; 46; 46; 48, 48′) which is led along at least one condensation surface (60; 60; 60″).

公开(公告)号：US10677249B2

公开(公告)日：2020-06-09

申请号：US15538470

申请日：2015-12-16

Applicant: Grundfos Holding A/S

Inventor： Thomas Blad ,  Christian Blad

IPC: F04D13/06 ,  F04D15/00 ,  F24D3/08 ,  F24D3/10 ,  F24D19/10 ,  F04D29/42 ,  F16K11/07 ,  F16K31/143

Abstract: A hydraulic system includes a circulation pump assembly (2) provided with a speed controller (4, 26), a hydraulic circuit (A, B) connected to the circulation pump assembly (2) as well as a mechanical switch device (86, 88; 120, 122; 120″, 122″) which is subjected to pressure from a fluid in the hydraulic circuit (A, B) and which can be moved into at least two different switch positions. The mechanical switch device (28; 86, 28; 120, 122) can be moved by the circulation pump assembly (2) by way of a hydraulic coupling via the fluid. The speed controller is configured to initiate a movement of the switch device (86, 88; 120, 122; 120″, 122″) by way of at least one hydraulic force acting thereon and causing a movement of the switch device (86, 88; 120, 122; 120″, 122″), produced via the hydraulic circuit, via a speed adaptation of the circulation pump assembly.

公开(公告)号：US20200158351A1

公开(公告)日：2020-05-21

申请号：US16635898

申请日：2018-08-02

Applicant: GRUNDFOS HOLDING A/S

Inventor： Thomas BLAD ,  Christian BLAD

IPC: F24D19/10 ,  F24D3/10 ,  F24D3/16 ,  F04D15/00 ,  F04D29/42

Abstract: A mixing device includes a first inlet (84) and a second inlet (86) inlet and an outlet (80). The first inlet (84) is connected to the outlet (80) via a first flow connection and the second inlet (86) is connected to the outlet (80) via a second flow connection. A circulation pump assembly (24; 46) includes an electric drive motor (30), a control device (34), for controlling the speed of the drive motor (30), and at least one impeller (68; 100) driven by the drive motor. The at least one impeller (68; 100) is positioned in the first flow connection. The flow connections are configured such that at least one hydraulic pressure generated by the impeller (68; 100) in the first flow connection acts as hydraulic resistance in the second flow connection.

公开(公告)号：US20200063980A1

公开(公告)日：2020-02-27

申请号：US16668711

申请日：2019-10-30

Applicant: GRUNDFOS HOLDING A/S

Inventor： Søren Emil SØRENSEN

IPC: F24D3/10 ,  F24D3/12 ,  F24D3/14 ,  F24H1/12 ,  F24D19/10

Abstract: A hydraulic manifold for a hydraulic heating and/or cooling system includes a feed conduit (212) and a return conduit (216). The feed conduit (212) includes at least one feed connection (258), and the return conduit (216) includes at least one return connection (260), for the connection of a load circuit (228). A load module (204), in which a section of the feed conduit (212) with the feed connection (258), and a section of the return conduit (216) with the return section (260) are formed, includes at least one mixing device with a pump (232) and with a regulating valve (230), to admix fluid from the return connection (260) to a fluid flow from the feed conduit (212) to the feed connection (258). The section of the feed conduit (212) and the return conduit (216) in each case include an additional contact for connection with a further load module.

公开(公告)号：US20200011309A1

公开(公告)日：2020-01-09

申请号：US16503047

申请日：2019-07-03

Applicant: GRUNDFOS HOLDING A/S

Inventor： Sergei GERZ ,  Valeri KECHLER

IPC: F04B13/00 ,  F04B49/06 ,  F04B43/04

Abstract: A Metering pump includes a displacement element (4), a drive system with an electric drive motor (12) driving the displacement element (4) and a control device (22) controlling the electric drive motor (12). The control device (22) is configured in such a manner that it detects the current position of the displacement element (4), detects the torque (M) of the electric drive motor (12) at several positions of the displacement element (4) and monitors the torque (M) in relation to the position of the displacement element (4), and a method for controlling such metering pump.

公开(公告)号：US20190390445A1

公开(公告)日：2019-12-26

申请号：US16447154

申请日：2019-06-20

Applicant: GRUNDFOS HOLDING A/S

Inventor： Carsten Skovmose KALLESØE ,  Abdul-Sattar HASSAN ,  Tom Nørgaard JENSEN

IPC: E03B7/07 ,  E03B1/02 ,  E03B7/09

Abstract: A control system (15) controls a water supply from at least two separate input lines (3i-k) into a sector (1) of a water supply network. The control system (15) is configured to receive input flow information indicative of the water input flow (qi-k) through each of the input lines (3i-k). The control system (15) is configured to receive input pressure information indicative of the input pressure (pi) in at least one (3i) of the input lines (3i-k). The control system (15) is configured to receive pressure information indicative of at least one pressure value (pcri,m,n) determined by a pressure sensor (7m,n) within the sector (1). The control system (15) is configured to control the input pressure (pi) by controlling at least a pressure regulating system (13i) at an input line (3i) based on the input flow information from all input lines (3i-k) and based on the sector pressure information.

公开(公告)号：US20190323513A1

公开(公告)日：2019-10-24

申请号：US16470876

申请日：2017-12-15

Applicant: GRUNDFOS HOLDING A/S

Inventor： Brian LUNDSTED POULSEN ,  Lasse SØGAARD LEDET

IPC: F04D29/16 ,  F04D17/08

Abstract: A centrifugal pump includes at least one pump stage, with a rotatable impeller (5) with a suction port (6) which is sealed with respect to a stationary pump part (1) by way of a sealing arrangement. The sealing arrangement includes a sealing ring (9) between the impeller (5) and the stationary pump part (1). The sealing arrangement is configured such that at least on delivery operation of the pump, the sealing arrangement has sealing sections which are distanced to the counter sealing surface and sealing sections which bear on the counter sealing surface, in an alternatingly successive manner considered in the peripheral direction of the sealing ring (9).