WO2009077166A1 - Pompe centrifuge avec capteur de débit - Google Patents

Pompe centrifuge avec capteur de débit Download PDF

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Publication number
WO2009077166A1
WO2009077166A1 PCT/EP2008/010733 EP2008010733W WO2009077166A1 WO 2009077166 A1 WO2009077166 A1 WO 2009077166A1 EP 2008010733 W EP2008010733 W EP 2008010733W WO 2009077166 A1 WO2009077166 A1 WO 2009077166A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
sensor
centrifugal pump
pump according
flow
Prior art date
Application number
PCT/EP2008/010733
Other languages
German (de)
English (en)
Inventor
Thomas Kettner
Edgar Budzynski
Edgar GROßE WESTHOFF
Original Assignee
Wilo Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40469833&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009077166(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wilo Ag filed Critical Wilo Ag
Priority to AT08863111T priority Critical patent/ATE503114T1/de
Priority to EP08863111A priority patent/EP2220374B1/fr
Priority to DE502008002985T priority patent/DE502008002985D1/de
Publication of WO2009077166A1 publication Critical patent/WO2009077166A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0227—Lack of liquid level being detected using a flow transducer

Definitions

  • the invention relates to a centrifugal pump with a suction and a discharge nozzle and a volume flow measuring flow sensor.
  • the object of the invention is to provide a centrifugal pump in which in a technically simple manner, the flow rate, in particular the flow rate at high accuracy can be detected.
  • the flow sensor is releasably secured in the wall of the suction or discharge nozzle and with a fluid, in particular the liquid flow sensing part in the nozzle channel extends. This ensures that there is a uniform liquid flow in the region of the flow sensor, which has no additional flow disturbances, in particular turbulences, which would falsify the measurement results, except for the vortex generated by the sensor or bluff body (turbulence element).
  • the channel in the pressure or suction connection is free of curvature in the direction of flow. Furthermore, it is proposed in this case that in the region of the sensor, the channel has a constant cross-section. It is preferably proposed that the sensor is a vortex flow sensor.
  • the sensing part has a sensor paddle. It is also advantageous if in the flow direction in front of the sensing part in the channel a baffle body is arranged, which is fixed to the carrier of the flow sensor. As a result, accurate measurement results are achieved.
  • a simple construction with easy assembly and interchangeability of the measuring parts is achieved when the carrier of the flow sensor forms a cylindrical body which rests in a cylindrical recess of the nozzle wall.
  • the carrier of the flow sensor receives the sensor electronics.
  • a uniform vortex and low-interference liquid flow in the region of the sensor is achieved when in the region of the sensor, the channel cross-section of the pressure or suction nozzle is substantially circular, oval, elliptical or rectangular with rounded corners.
  • the channel cross section of the pressure or suction nozzle has a tapering of the cross section.
  • a grid, blades or at least one sword arranged and aligned in the flow direction.
  • a grid, lamellae or at least one sword can also be arranged at the point at which the nozzle channel opens into the pump chamber.
  • the flow sensor is arranged in the wall of the pump suction nozzle, since in the region of the pump suction nozzle rather a sufficiently long channel path with low disturbing turbulence / vortex is achievable.
  • the curvature-free channel region has a length which corresponds to 20 to 50%, preferably 30 to 40% of the total length of the suction channel. Exposure of vortices generated by the pump impeller to the measuring path is avoided by virtue of the channel region between the end of the straight channel region and the channel end opening into the pump chamber having a length which corresponds to 30 to 50% of the total length of the suction channel.
  • the centrifugal pump has a pump chamber 1, in which an unillustrated impeller is mounted. At the pump chamber, a suction nozzle 3 is connected, which forms a suction channel 4, which opens centrally of the impeller to the impeller laterally.
  • the pump chamber forms a spiral space around the impeller, which leads to a pressure port 5 with a pressure channel.
  • the suction channel 4 forms between its inlet region 4a and its opening into the pump chamber end 4b in the region of the flow sensor 11 and thus before and after the flow sensor has a curvature free channel region 4c constant cross-section, which forms a straight flow path with low Wirbelnfi ⁇ urbulenzen.
  • this straight channel region 4c is round, oval, elliptical or rectangular in cross-section, in order to achieve a further flow equalization.
  • a grid or lamellae arranged in the channel end 4b is advantageous in order to prevent or at least reduce a backflow reaction of the impeller onto the straight channel region 4c.
  • the straight acting as a measuring section channel region 4c in particular constant cross section thus begins before the sensor 11 and ends behind the sensor 11 and has a length which corresponds to 20 to 50%, preferably 30 to 40% of the total length of the suction channel 4.
  • the channel region 4d between the end of the straight channel region 4c and the channel end 4b opening into the pump chamber has a length corresponding to 30 to 50% of the total length of the suction channel 4, so that vortices generated by the pump impeller do not falsify the measurement results ,
  • a nozzle 8 with a recess 9 is arranged on the channel wall 7, in which a cylindrical body is detachably inserted.
  • the body 10 forms the support of a flow sensor 1 1, on which a sensing part to the channel region 4 c protrudes, wherein in the channel wall 7, a corresponding bore 13 is introduced, which connects the recess 9 with the channel region 4 c.
  • the sensing part 12 extends into the channel region 4c, wherein the part 12 is a sensor paddle or another, the flow in particular the pressure pulsations detecting part.
  • a further bore 14 is introduced into the channel wall 7, through which a body 15 protruding baffle 15 extends into the Ka ⁇ al Scheme 4c, the baffle 15 rests in the flow direction in front of the sensing part 12 in the channel.
  • the body 10 of the flow sensor 11 is cylindrical outside and is positively in the cylindrical recess 9, so that the outer diameter of the body 10 corresponds to the inner diameter of the recess. In this case, the body 10 receives the sensor electronics of the flow sensor.
  • the channel region 4c preferably has a cross-sectional taper, which is not shown in the drawing, in order to increase the flow velocity in the region of the sensor and thus to make the sensitivity of the sensor more sensitive and to increase the measurement accuracy.
  • the flow sensor may be arranged in the discharge nozzle.
  • the most diverse measuring principles are used, preferably vortex principle, thermal, acoustic and mechanical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe centrifuge avec une tubulure d'aspiration (3) et une tubulure de refoulement (5), et avec un capteur de débit (11) mesurant le débit volumique. Le capteur de débit est fixé de manière amovible dans la paroi (7) de la tubulure d'aspiration ou dans la paroi de la tubulure de refoulement, et il s'étend à l'intérieur du conduit de la tubulure par une partie (12) détectant l'écoulement de fluide, en particulier l'écoulement de liquide.
PCT/EP2008/010733 2007-12-18 2008-12-17 Pompe centrifuge avec capteur de débit WO2009077166A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT08863111T ATE503114T1 (de) 2007-12-18 2008-12-17 Kreiselpumpe mit durchflusssensor
EP08863111A EP2220374B1 (fr) 2007-12-18 2008-12-17 Pompe centrifuge avec capteur de débit
DE502008002985T DE502008002985D1 (de) 2007-12-18 2008-12-17 Kreiselpumpe mit durchflusssensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007061559.2 2007-12-18
DE102007061559A DE102007061559A1 (de) 2007-12-18 2007-12-18 Kreiselpumpe mit Durchflusssensor

Publications (1)

Publication Number Publication Date
WO2009077166A1 true WO2009077166A1 (fr) 2009-06-25

Family

ID=40469833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/010733 WO2009077166A1 (fr) 2007-12-18 2008-12-17 Pompe centrifuge avec capteur de débit

Country Status (4)

Country Link
EP (1) EP2220374B1 (fr)
AT (1) ATE503114T1 (fr)
DE (2) DE102007061559A1 (fr)
WO (1) WO2009077166A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2172654B2 (fr) † 2008-10-01 2013-11-20 Grundfos Management A/S Agrégat de pompe centrifuge

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010282228B2 (en) * 2009-08-11 2013-04-18 Resmed Motor Technologies Inc. Single stage, axial symmetric blower and portable ventilator
DE102021110755A1 (de) 2021-04-27 2022-10-27 Prominent Gmbh Verfahren zur Aufnahme von Dosierprofilen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437349A (en) * 1982-09-16 1984-03-20 Ford Motor Company Vortex flow meter frequency adjustment
US5129264A (en) 1990-12-07 1992-07-14 Goulds Pumps, Incorporated Centrifugal pump with flow measurement
DE9317856U1 (de) * 1993-11-16 1994-01-20 Schroeder Wolfgang Kreiselpumpe mit Strömungsleitblechen
US6237425B1 (en) * 1996-11-11 2001-05-29 Kabushiki Kaisha Saginomiya Seisakusho Kármán vortex flow meter
WO2004038344A1 (fr) * 2002-10-23 2004-05-06 Endress + Hauser Flowtec Ag Debitmetre a tourbillons
US6752027B1 (en) 1999-04-06 2004-06-22 The Foxboro Company Vortex flowmeter including removeable and replaceable flow-obstruction element
US20050217389A1 (en) * 2004-04-05 2005-10-06 Rosemount Inc. Scalable averaging insertion vortex flow meter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647967B4 (de) * 1996-11-20 2005-10-27 Wilo Ag Pumpe mit Druckdifferenzsensor
DE10249129A1 (de) * 2002-10-22 2004-06-03 Wilo Ag Pumpe mit Sensor im Pumpengehäuse
DE102004037467A1 (de) * 2004-07-30 2006-02-16 Abb Patent Gmbh Wirbeldurchflussmesseinrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437349A (en) * 1982-09-16 1984-03-20 Ford Motor Company Vortex flow meter frequency adjustment
US5129264A (en) 1990-12-07 1992-07-14 Goulds Pumps, Incorporated Centrifugal pump with flow measurement
DE9317856U1 (de) * 1993-11-16 1994-01-20 Schroeder Wolfgang Kreiselpumpe mit Strömungsleitblechen
US6237425B1 (en) * 1996-11-11 2001-05-29 Kabushiki Kaisha Saginomiya Seisakusho Kármán vortex flow meter
US6752027B1 (en) 1999-04-06 2004-06-22 The Foxboro Company Vortex flowmeter including removeable and replaceable flow-obstruction element
WO2004038344A1 (fr) * 2002-10-23 2004-05-06 Endress + Hauser Flowtec Ag Debitmetre a tourbillons
US20050217389A1 (en) * 2004-04-05 2005-10-06 Rosemount Inc. Scalable averaging insertion vortex flow meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2172654B2 (fr) † 2008-10-01 2013-11-20 Grundfos Management A/S Agrégat de pompe centrifuge

Also Published As

Publication number Publication date
ATE503114T1 (de) 2011-04-15
EP2220374B1 (fr) 2011-03-23
DE502008002985D1 (de) 2011-05-05
EP2220374A1 (fr) 2010-08-25
DE102007061559A1 (de) 2009-06-25

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