公开(公告)号：US20180320691A1

公开(公告)日：2018-11-08

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

CPC classification number: F04D13/027 ,  F04D7/06 ,  F04D13/06 ,  H02K49/106 ,  H02K2201/06

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：US10094385B2

公开(公告)日：2018-10-09

申请号：US14882750

申请日：2015-10-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen Mikkelsen ,  Carl-Christian Danielsen

IPC: F04D17/12 ,  F04D1/06 ,  F04D29/42 ,  F04D29/62 ,  F04D13/02

Abstract: A multistage centrifugal pump includes a foot part (1) and a head part (7), between which several pump stages are arranged. Each of the pump stages includes an impeller (4) and a housing (5) surrounding the impeller (4). The housings (5) are arranged over one another. The housings (5) together with an outer casing (9) form an annular channel (8). The housings (5) together with an outer casing (9) are clamped via clamping bolts (11) which are fastened on the head part (7) and the foot part (1). The clamping bolts (11) are arranged within the annular channel (8).

公开(公告)号：US20180283702A1

公开(公告)日：2018-10-04

申请号：US15765346

申请日：2016-09-30

Applicant: GRUNDFOS HOLDING A/S

Inventor： Thomas BLAD

IPC: F24D19/10 ,  F24D3/10 ,  F16K1/12 ,  F16K41/10 ,  F16K11/048

Abstract: A hydraulic system includes at least one pump assembly and a switching device which includes at least two switch positions. The switching device is configured such that on operation of the pump assembly in a first operating condition, the switching device is held in a stable manner in each of the at least two switch positions in each case by the hydraulic forces in the system. In a second operating condition of the pump assembly, the switching device is moved from a first switch position into a second switch position, assisted by switching energy stored in the first operating condition. The hydraulic system is configured such that in the first operating condition, the switching energy is stored independently of a switching-over of the switching device between the switch positions. A method is provided for operating such a hydraulic system.

公开(公告)号：US10036390B2

公开(公告)日：2018-07-31

申请号：US14369359

申请日：2012-12-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Finn Mathiesen Høj ,  Tom Eklundh Larsen

IPC: F04D13/06 ,  F04D29/08

CPC classification number: F04D13/0626 ,  F04D13/0606 ,  F04D29/086

Abstract: A pump assembly includes a pump housing (2) and a stator housing (16), which is connected to the pump housing (2) and in which a wet-running electric motor with a can (18, 18′) is arranged. A plate-like bearing carrier (26, 26′) of sheet-material is arranged between the pump housing and the stator housing (16). The bearing carrier (26, 26′) includes a centering surface (40, 40′) in a manner distanced to its free peripheral edge, said centering surface coming into bearing contact on a corresponding contact surface (42) of the pump housing (2) in a manner such that the bearing carrier (26, 26′) with the can (18, 18′) is centered relative to the pump housing (2).

公开(公告)号：US10033251B2

公开(公告)日：2018-07-24

申请号：US14372096

申请日：2013-02-19

Applicant: GRUNDFOS HOLDING A/S

Inventor： Peter Mønster ,  Lars Østergaard

IPC: H02K5/10 ,  H02K11/00 ,  F04D13/06 ,  H05K7/14 ,  H02K5/22 ,  H02K11/30 ,  H02K11/33

Abstract: An electric motor with an electronics housing (6) includes a removable cover (10) as well as an operating unit. The operating unit includes an operating panel (20) fastened on the cover (10). The cover (10) with the operating panel (20) is connectable to a lower part (8) of the electronics housing (6) in at least two alternative alignments. A pump assembly is also provided with such an electric motor.

公开(公告)号：US10027199B2

公开(公告)日：2018-07-17

申请号：US14655374

申请日：2013-12-20

Applicant: GRUNDFOS HOLDING A/S

Inventor： Christian Schuldt ,  Carl-Christian Danielsen

IPC: H02K5/22 ,  F04D13/06 ,  F04D29/58 ,  F04D25/06 ,  F04D29/18 ,  F04D29/26 ,  F04D29/40 ,  H02K11/30 ,  H02K11/33

Abstract: A pump assembly with an electric motor which includes a stator housing (6) and an electronics housing (4; 50) fastened at the outside on the stator housing (6). The electronics housing (4; 50) is connected to the stator housing (6) via at least one fastening element (24, 24′; 56). The fastening element is situated within an outer contour of the electronics housing (4; 50) which is delimited by the outer walls of the electronics housing (4; 50) and is accessible even with a closed electronics housing (4; 50).

公开(公告)号：US10024324B2

公开(公告)日：2018-07-17

申请号：US14368852

申请日：2012-12-19

Applicant: Grundfos Holding a/s

Inventor： Thomas Blad

IPC: F04D13/06 ,  F04D29/041 ,  F04D29/049 ,  F04D29/16 ,  F04D29/042 ,  F04D29/047

Abstract: A pump assembly includes an electric drive motor having a stator and a permanent magnet rotor, at least one impeller connected to the rotor via a rotor shaft, a thrust bearing accommodating axial forces acting on the impeller and rotor shaft in operation, and at least one radial bearing arranged on the rotor shaft. The rotor and stator are designed such that a magnetic axial force, acting in the direction of the rotation axis of the rotor and acting on the rotor in the direction of the inflow direction into the impeller, is produced between the rotor and the stator. The rotor shaft and rotor are mounted displaceably in the axial direction relative to the stator, and with an axial displacement of the rotor shaft in the inflow direction into the impeller, the bearing surfaces of the radial bearing lying opposite one another at least partly disengage.

公开(公告)号：US20180106650A1

公开(公告)日：2018-04-19

申请号：US15783409

申请日：2017-10-13

Applicant: GRUNDFOS HOLDING A/S

Inventor： Ole Hartlev PEDERSEN

IPC: G01F1/66 ,  G01F15/06

Abstract: A method evaluates a frequency spectrum representative of at least one time-dependent signal, the at least one time dependent signal being derived from an output from a measuring device under predetermined measuring device operating conditions. The time-dependent signal, includes a portion being representative of a wanted signal, and a portion being representative of noise. The method includes the steps of determining, based on the frequency spectrum of the signal, a value representative of the noise floor, identifying, based on the frequency spectrum of the signal derived under the predetermined operating condition, a peak component, and if the peak component satisfies a relative peak criterion determined on the basis of the determined value representative of the noise floor, determining the wanted signal by applying a predetermined algorithm. The invention further relates to a method for determining flow of a vortex measuring device, and a vortex sensor.

公开(公告)号：US09863436B2

公开(公告)日：2018-01-09

申请号：US14377282

申请日：2013-01-17

Applicant: GRUNDFOS HOLDING A/S

Inventor： Casper Pedersen ,  Nicholas Pedersen

IPC: F04D1/00 ,  F04D29/42 ,  F04D15/00

CPC classification number: F04D29/428 ,  F04D1/00 ,  F04D15/0088 ,  F04D29/426

Abstract: A pump housing has a spiral housing and includes a suction channel (14) which runs out in a space (15). The space (15) is for arranging an impeller (6), rotatable about a rotation axis (5), and includes a spirally peripheral channel (16) open to the space (15) and running out into a pressure channel. A receiver (20) for a differential pressure sensor is provided within the pump housing. A first sensor channel (22) is provided, which connects the receiver (20) to a pressure-side interior of the pump housing. A second sensor channel (23) connects the receiver (20) to the pressure-side interior of the pump housing. The receiver (20) for the differential pressure sensor is arranged between the spirally peripheral channel (16) and the suction channel (14), so that the channels can be formed by way of simple bores.

公开(公告)号：US20170328746A1

公开(公告)日：2017-11-16

申请号：US15533183

申请日：2015-08-28

Applicant: Grundfos Holding A/S

Inventor： Kjeld Winther JACOBSEN ,  John B. JACOBSEN ,  Mikkel HAUGAARD

IPC: G01D11/24 ,  G12B9/04

CPC classification number: G01D11/245 ,  G12B9/04

Abstract: A sensor arrangement includes at least one sensor (7) as well as a housing (1) constructed of at least two plastic injection molded parts (2, 3), and a sensor electronics which are located on the circuit board (5) and which is secured by this housing. At least one absorption body (4) is provided within the housing (1) and is designed as a plastic injection molded part and serves for absorbing fluid which could get into the housing by diffusion.