EP1422424A2 - Verfahren und Vorrichtung zur Störungsfrüherkennung bei Kreiselpumpen - Google Patents
Verfahren und Vorrichtung zur Störungsfrüherkennung bei Kreiselpumpen Download PDFInfo
- Publication number
- EP1422424A2 EP1422424A2 EP03021880A EP03021880A EP1422424A2 EP 1422424 A2 EP1422424 A2 EP 1422424A2 EP 03021880 A EP03021880 A EP 03021880A EP 03021880 A EP03021880 A EP 03021880A EP 1422424 A2 EP1422424 A2 EP 1422424A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- spring element
- pump
- axial
- fault detection
- 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
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
- F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
Definitions
- the invention relates to a method and an apparatus for Early fault detection in a facility equipped with a relief device Centrifugal pump, the relief device having an axial gap and optionally has one or more radial gaps over which a Discharge current is performed, wherein also the discharge device in In the sense of lifting off from the radial column or columns Spring element is present.
- centrifugal pump A major malfunction inside the centrifugal pump arises when bearing wear out or if a relief device is insufficient is working. Such a disorder can be gradual. So she likes in her Beginning with no symptoms that can be seen on the outside of the centrifugal pump and only after significant damage has occurred and possible failure the centrifugal pump become manifest.
- a load cell It is also possible to determine axial forces with the help of an axial touching sensor, a load cell. Such Load cell can not be permanent from a design point of view be used.
- the invention has for its object a method and an apparatus for Early detection of malfunctions in centrifugal pumps of the type mentioned at the beginning create which with extensive use of already existing elements provide reliable information about impending faults.
- the object is achieved in that during the Operation of the centrifugal pump, based on the pump characteristic of the Centrifugal pump and the spring constant of the spring element, the deformation of the Spring element measured and a conclusion on the current operating point the centrifugal pump is pulled.
- each for the type of centrifugal pump to be monitored using the early fault detection and the medium to be funded basic measurements are made, which the Axial force, the relief force and the pressure distribution in the wheel side space with Relating operating points on the characteristic curve of the centrifugal pump.
- a particularly advantageous device for performing the invention results when a gimbal is used as the spring element is, which is dimensioned so that it by a due to the interpretation of the Relief device predefined defined residual axial force for adjustment an also predetermined axial gap is deformed.
- One with the named Relief device equipped is known by the WO 00/77405 A1.
- the method and its device come with a Minimum of sensors. Due to their direct connection to the Relief device results in a very early and reliable reaction Fault detection. Due to the elastic behavior of the in as special used gimbal can be considered advantageous device for the rest the rotor dynamic behavior of the centrifugal pump can be stabilized.
- the double piston 4 is an inventive one Relief device attached on the shaft 2.
- the double piston 4 is surrounded by one Housing part 5 with which it forms two radial gaps 6 and 7. Between radial gaps 6 and 7 there is an axial gap 8.
- the axial gap 8 has a variable width s.
- the thrust bearing 9 is a gimbal Ring 10 assigned.
- the gimbal 10 initially serves in a known manner the compensation of misalignments that occur when installing a multi-stage Centrifugal pump are inevitable. Otherwise, the gimbal ring 10 is like this dimensioned so that it occurs in the centrifugal pump, to the suction side directed residual thrust is elastically deformed.
- the relief device is designed so that it is in all operating states the centrifugal pump produces a residual thrust that acts in the direction of the suction side. Starting from a maximum width s of the axial gap 8 in the idle state the centrifugal pump is now due to an elastic deformation of the gimbal Ring 10 of the gap 8 under operating conditions to a predetermined Minimum width closed at which a contact of the gap 8 bounding surfaces of the double piston 4 and the housing part 5 still is avoided.
- the relief device allows that the axial Gap 8 has a self-regulating function.
- Such measuring devices can be recognized early on, which are impermissible indicate hydraulic conditions or an onset of bearing wear.
- the Deformation of the gimbal ring during pump operation 10 is by a suitable means, for example a - not shown - Strain gauges of a known type, determined and as a signal via a line 11 transmitted to a device for signal processing.
- the direct one mechanical coupling of the gimbal acting as an axial force transducer Ring 10 to the measuring system enables the measurement of signals without the dampening influence of a fluid film, which is in contactless Sensors is always between the sensor and the component.
- the axial force measuring device shown in FIG. 2 is like the device of FIG Fig. 1, on the pressure side bearing bracket 12 of a high-pressure link pump appropriate.
- the individual components of the measuring device are from one cylindrical housing 13 added.
- the adaptation construction sees that Use of two gimbal rings 14, 15 before, making the measurement of Axial forces in both directions of action is made possible.
- the gimbal rings 14, 15 can be preloaded in a rotor-dynamic manner become. This takes place in the suction-side ring 14 via a spacer ring 16, in the case of the pressure-side ring 15 via a spacer bushing 17.
- the force is introduced into the device starting from the pump rotor an axial bearing plate 18 which is rotatably connected to the shaft 2.
- the Axial bearing plate 18 transmits the force depending on the direction of action of the axial thrust on one of two axial deep groove ball bearings 19, 20, which directly on the gimbal rings 14, 15 are coupled.
- the gimbals 14, 15 are stressed on deflection and thus represent spring elements in one Non-balanced residual forces are over the spacer ring 16 or the spacer 17 passed into the housing.
- Cylinder pin 21 By one at a time Cylinder pin 21, the gimbal rings 14, 15 against twisting secured.
- the state of deformation becomes one via lines 22 and 23 Device for signal processing transmitted.
- the signal processing on the gimbals 14, 15 is on a high-pressure link pump 24 schematically recorded measurement signals shown.
- the first link in the axial force measuring chain are those with - not shown - Strain gauges applied gimbal rings 14, 15.
- a ring 14 or 15 is provided per load direction.
- On each ring 14, 15 has two - not shown - strain gauge full bridges installed, whose input and output signals are connected in parallel.
- the circuit forms the characteristic values of the strain gauges used in the bridges electrical mean of the two bridge output signals. This will make the caused by any eccentric application of force to the rings uneven stress distributions compensated.
- the output signal is sent to a transducer via a strain gauge amplifier 25 26 forwarded. This converts the signal into an output voltage from 0-10V around.
- the signal is then sent to a data acquisition card of a computer 27, whereby a display and further processing of the recorded measurement data is possible.
- the device shown in Fig. 3 is to be regarded as an experimental setup.
- the elements used in the Centrifugal pump 24 can be integrated.
- Some of the elements can be found in the practical application can also be dispensed with, e.g. on the print side Ring 15.
- one can hydrodynamic thrust bearing can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
- Fig.1
- einen Ausschnitt aus einer im Schnitt dargestellten mehrstufigen Kreiselpumpe mit einem saugseitig angeordneten kardanischen Ring, der sowohl zur Einstellung eines vorgegebenen Axialspaltes an einer Entlastungseinrichtung als auch als Element einer Axialkraft-Meßeinrichtung zur Durchführung des erfindungsgemäßen Verfahrens dient;
- Fig. 2
- einen Ausschnitt aus einer im wesentlichen der Ausführung der Fig. 1 entsprechenden Kreiselpumpe mit einem saugseitig und einem druckseitig angeordneten kardanischen Ring zur Schaffung einer in beiden Schubrichtungen wirkenden Axialkraft-Meßvorrichtung;
- Fig. 3
- eine schematische Darstellung einer Kreiselpumpe mit einer Einrichtung zur Verarbeitung der von der Axialkraft-Meßvorrichtung aufgenommenen Signale.
Claims (8)
- Verfahren zur Störungsfrüherkennung bei einer mit einer Entlastungseinrichtung ausgestatteten Kreiselpumpe , wobei die Entlastungseinrichtung einen axialen Spalt und gegebenenfalls einen oder mehrere radiale Spalte besitzt, über welche ein Entlastungsstrom geführt wird, wobei ferner ein die Entlastungseinrichtung im Sinne eines Abhebens von dem oder den radialen Spalten beaufschlagendes Federelement vorhanden ist dadurch gekennzeichnet, daß während des Betriebes der Kreiselpumpe (24), ausgehend von der Pumpenkennlinie der Kreiselpumpe (24) und der Federkonstanten des Federelementes (10, 14), die Verformung des Federelementes (10, 14) gemessen und ein Rückschluß auf den aktuellen Betriebspunkt der Kreiselpumpe (24) gezogen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß jeweils für den mittels der Störungsfrüherkennung zu überwachenden Kreiselpumpentyp und das zu fördernde Medium Basismessungen vorgenommen werden, die die Axialkraft, die Entlastungskraft und die Druckverteilung im Radseitenraum mit Betriebspunkten auf der Kennlinie der Kreiselpumpe (24) ins Verhältnis setzt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß jeweils für den mittels der Störungsfrüherkennung zu überwachenden Kreiselpumpentyp und das zu fördernde Medium eine die Frequenzspektren des Federelementes (10, 14) ermittelnde dynamische Messung zur Feststellung von Frequenzbändern, welche dem Förderstrom zugeordnet werden und damit einen Hinweis auf mögliche Störungen in der Kreiselpumpe (24) geben, vorgenommen wird.
- Verfahren zur Störungsfrüherkennung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mit Hilfe eines zweiten Federelementes (15), welches in Gegenrichtung zum ersten Federelement (14) angeordnet ist, eine Kontrolle auf einen in Richtung der Druckseite der Kreiselpumpe (24) erfolgenden Axialschub und gegebenenfalls eine Messung dieses Axialschubes vorgenommen wird.
- Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Federelement ein kardanischer Ring (10, 14) verwendet wird, der so dimensioniert ist, daß er durch eine aufgrund der Auslegung der Entlastungseinrichtung vorgegebene definierte Rest-Axialkraft zur Einstellung eines ebenfalls vorgegebenen Axialspaltes verformt wird.
- Anwendung des Verfahren zur Störungsfrüherkennung nach einem der Ansprüche 1 bis 4 zur Erkennung eines beginnenden Lagerverschleißes.
- Anwendung des Verfahren zur Störungsfrüherkennung nach einem der Ansprüche 1 bis 4 zur Vermeidung eines Anlaufens des Rotors am Gehäuse der Kreiselpumpe.
- Anwendung des Verfahren zur Störungsfrüherkennung nach einem der Ansprüche 1 bis 4 zur Erkennung unzulässiger Kavitationszustände.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10254041 | 2002-11-20 | ||
DE10254041A DE10254041B4 (de) | 2002-11-20 | 2002-11-20 | Verfahren und Vorichtung zur Störungsfrüherkennung bei Kreiselpumpen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1422424A2 true EP1422424A2 (de) | 2004-05-26 |
EP1422424A3 EP1422424A3 (de) | 2009-05-20 |
EP1422424B1 EP1422424B1 (de) | 2016-08-10 |
Family
ID=32185857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03021880.4A Expired - Lifetime EP1422424B1 (de) | 2002-11-20 | 2003-09-27 | Verfahren und Vorrichtung zur Störungsfrüherkennung bei Kreiselpumpen |
Country Status (4)
Country | Link |
---|---|
US (1) | US6877947B2 (de) |
EP (1) | EP1422424B1 (de) |
JP (1) | JP4093949B2 (de) |
DE (1) | DE10254041B4 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103629121A (zh) * | 2013-12-12 | 2014-03-12 | 兰州理工大学 | 一种离心泵叶轮动态轴向力的测试装置 |
CN104121179A (zh) * | 2014-07-11 | 2014-10-29 | 兰州理工大学 | 一种离心泵的叶轮叶片表面液体压力的测试装置 |
DE102018210842A1 (de) | 2018-07-02 | 2020-01-02 | KSB SE & Co. KGaA | Anordnung zur Aufnahme des Axialschubes einer Kreiselpumpe |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7552176B2 (en) * | 2003-03-12 | 2009-06-23 | Microsoft Corporation | Reducing unwanted and unsolicited electronic messages by exchanging electronic message transmission policies and solving and verifying solutions to computational puzzles |
DE102013223806A1 (de) | 2013-11-21 | 2015-05-21 | Ksb Aktiengesellschaft | Entlastungseinrichtung |
CN104500413B (zh) * | 2014-11-21 | 2017-01-11 | 江苏大学 | 一种潜液泵的轴向力测量装置 |
CN106907337B (zh) * | 2017-05-10 | 2018-05-25 | 沈阳工业大学 | 屏蔽泵的轴向力测试系统及方法 |
CA3082469C (en) | 2017-12-29 | 2022-08-02 | Halliburton Energy Services, Inc. | Valve failure determination in a pump monitoring system |
WO2019132952A1 (en) * | 2017-12-29 | 2019-07-04 | Halliburton Energy Services, Inc. | Sensor failure diagnosis in a pump monitoring system |
RU181078U1 (ru) * | 2018-02-13 | 2018-07-04 | Федеральное государственное автономное образовательное учреждение высшего образования "Северо-Восточный федеральный университет имени М.К.Аммосова" | Электронасосный агрегат секционного типа |
DE102019001120A1 (de) * | 2019-02-15 | 2020-08-20 | KSB SE & Co. KGaA | Entlastungseinrichtung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3542494A (en) * | 1967-11-09 | 1970-11-24 | Nikkisco Co Ltd | Canned motor pump |
US5104284A (en) * | 1990-12-17 | 1992-04-14 | Dresser-Rand Company | Thrust compensating apparatus |
EP0971212A1 (de) * | 1998-07-10 | 2000-01-12 | Sulzer Electronics AG | Verfahren zur Bestimmung des Druckverlustes und des Durchflusses durch eine Pumpe |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE886250C (de) * | 1951-11-10 | 1953-08-13 | Klein | Abhebevorrichtung fuer Entlastungsscheiben von Kreiselmaschinen |
CH501839A (fr) * | 1966-11-12 | 1971-01-15 | Zabrzanska Fabryka Masz Gornic | Pompe dynamique |
JPS5587889A (en) * | 1978-12-27 | 1980-07-03 | Kubota Ltd | Abnormal balancing detector for multistage pump |
US4578018A (en) * | 1983-06-20 | 1986-03-25 | General Electric Company | Rotor thrust balancing |
US4884942A (en) * | 1986-06-30 | 1989-12-05 | Atlas Copco Aktiebolag | Thrust monitoring and balancing apparatus |
DE3725754A1 (de) * | 1987-08-04 | 1989-02-16 | Busch Dieter & Co Prueftech | Einrichtung zum ueberwachen von pumpen auf gefaehrdung durch kavitation |
JP2636097B2 (ja) | 1991-08-08 | 1997-07-30 | 動力炉・核燃料開発事業団 | 浸漬型電動ポンプにおけるスラスト軸受の摩耗量の監視装置 |
DE29500744U1 (de) * | 1995-01-18 | 1996-05-15 | Sihi Ind Consult Gmbh | Strömungsmaschine mit Entlastungskolben |
SE516957C2 (sv) * | 1995-04-25 | 2002-03-26 | Abs Pump Prod Ab | Sätt att för en centrifugalpump bestämma momentens driftsförhållanden vad avser uppfordringshöjd och volymström genom att den resulterande radialkraften på pumphjulets axel uppmäts till storlek och riktning |
DE19927135A1 (de) | 1999-06-15 | 2000-12-21 | Ksb Ag | Entlastungseinrichtung für mehrstufige Kreiselpumpen |
-
2002
- 2002-11-20 DE DE10254041A patent/DE10254041B4/de not_active Expired - Fee Related
-
2003
- 2003-09-27 EP EP03021880.4A patent/EP1422424B1/de not_active Expired - Lifetime
- 2003-11-19 US US10/715,831 patent/US6877947B2/en not_active Expired - Fee Related
- 2003-11-20 JP JP2003390257A patent/JP4093949B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3542494A (en) * | 1967-11-09 | 1970-11-24 | Nikkisco Co Ltd | Canned motor pump |
US5104284A (en) * | 1990-12-17 | 1992-04-14 | Dresser-Rand Company | Thrust compensating apparatus |
EP0971212A1 (de) * | 1998-07-10 | 2000-01-12 | Sulzer Electronics AG | Verfahren zur Bestimmung des Druckverlustes und des Durchflusses durch eine Pumpe |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103629121A (zh) * | 2013-12-12 | 2014-03-12 | 兰州理工大学 | 一种离心泵叶轮动态轴向力的测试装置 |
CN104121179A (zh) * | 2014-07-11 | 2014-10-29 | 兰州理工大学 | 一种离心泵的叶轮叶片表面液体压力的测试装置 |
DE102018210842A1 (de) | 2018-07-02 | 2020-01-02 | KSB SE & Co. KGaA | Anordnung zur Aufnahme des Axialschubes einer Kreiselpumpe |
WO2020007838A1 (de) | 2018-07-02 | 2020-01-09 | KSB SE & Co. KGaA | Anordnung zur aufnahme des axialschubes einer kreiselpumpe |
DE102018210842B4 (de) | 2018-07-02 | 2020-01-16 | KSB SE & Co. KGaA | Anordnung zur Aufnahme des Axialschubes einer Kreiselpumpe |
US11536274B2 (en) | 2018-07-02 | 2022-12-27 | KSB SE & Co. KGaA | Arrangement for receiving the axial thrust of a centrifugal pump |
Also Published As
Publication number | Publication date |
---|---|
US20040151581A1 (en) | 2004-08-05 |
EP1422424B1 (de) | 2016-08-10 |
JP4093949B2 (ja) | 2008-06-04 |
US6877947B2 (en) | 2005-04-12 |
EP1422424A3 (de) | 2009-05-20 |
DE10254041A1 (de) | 2004-06-03 |
JP2004169704A (ja) | 2004-06-17 |
DE10254041B4 (de) | 2011-07-07 |
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