EP2220374A1 - Kreiselpumpe mit durchflusssensor - Google Patents
Kreiselpumpe mit durchflusssensorInfo
- Publication number
- EP2220374A1 EP2220374A1 EP08863111A EP08863111A EP2220374A1 EP 2220374 A1 EP2220374 A1 EP 2220374A1 EP 08863111 A EP08863111 A EP 08863111A EP 08863111 A EP08863111 A EP 08863111A EP 2220374 A1 EP2220374 A1 EP 2220374A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- sensor
- centrifugal pump
- pump according
- flow
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007061559A DE102007061559A1 (de) | 2007-12-18 | 2007-12-18 | Kreiselpumpe mit Durchflusssensor |
| PCT/EP2008/010733 WO2009077166A1 (de) | 2007-12-18 | 2008-12-17 | Kreiselpumpe mit durchflusssensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2220374A1 true EP2220374A1 (de) | 2010-08-25 |
| EP2220374B1 EP2220374B1 (de) | 2011-03-23 |
Family
ID=40469833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08863111A Active EP2220374B1 (de) | 2007-12-18 | 2008-12-17 | Kreiselpumpe mit durchflusssensor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2220374B1 (de) |
| AT (1) | ATE503114T1 (de) |
| DE (2) | DE102007061559A1 (de) |
| WO (1) | WO2009077166A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2172654B2 (de) † | 2008-10-01 | 2013-11-20 | Grundfos Management A/S | Kreiselpumpenaggregat |
| NZ597256A (en) * | 2009-08-11 | 2013-11-29 | 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 |
Family Cites Families (10)
| 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 | Afuema Abfüllmaschinen GmbH, 06862 Roßlau | Kreiselpumpe mit Strömungsleitblechen |
| JPH10142017A (ja) * | 1996-11-11 | 1998-05-29 | Saginomiya Seisakusho Inc | カルマン渦流量計 |
| DE19647967B4 (de) * | 1996-11-20 | 2005-10-27 | Wilo Ag | Pumpe mit Druckdifferenzsensor |
| US6752027B1 (en) | 1999-04-06 | 2004-06-22 | The Foxboro Company | Vortex flowmeter including removeable and replaceable flow-obstruction element |
| DE10249543A1 (de) * | 2002-10-23 | 2004-05-06 | Endress + Hauser Flowtec Ag, Reinach | Wirbelströmungsaufnehmer |
| DE10249129A1 (de) * | 2002-10-22 | 2004-06-03 | Wilo Ag | Pumpe mit Sensor im Pumpengehäuse |
| US7073394B2 (en) * | 2004-04-05 | 2006-07-11 | Rosemount Inc. | Scalable averaging insertion vortex flow meter |
| DE102004037467A1 (de) * | 2004-07-30 | 2006-02-16 | Abb Patent Gmbh | Wirbeldurchflussmesseinrichtung |
-
2007
- 2007-12-18 DE DE102007061559A patent/DE102007061559A1/de not_active Withdrawn
-
2008
- 2008-12-17 DE DE502008002985T patent/DE502008002985D1/de active Active
- 2008-12-17 WO PCT/EP2008/010733 patent/WO2009077166A1/de not_active Ceased
- 2008-12-17 AT AT08863111T patent/ATE503114T1/de active
- 2008-12-17 EP EP08863111A patent/EP2220374B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009077166A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009077166A1 (de) | 2009-06-25 |
| DE102007061559A1 (de) | 2009-06-25 |
| EP2220374B1 (de) | 2011-03-23 |
| DE502008002985D1 (de) | 2011-05-05 |
| ATE503114T1 (de) | 2011-04-15 |
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