DE19600640A1 - Sensor for determining speed of motor esp. driving centrifugal pump - Google Patents

Sensor for determining speed of motor esp. driving centrifugal pump

Info

Publication number
DE19600640A1
DE19600640A1 DE1996100640 DE19600640A DE19600640A1 DE 19600640 A1 DE19600640 A1 DE 19600640A1 DE 1996100640 DE1996100640 DE 1996100640 DE 19600640 A DE19600640 A DE 19600640A DE 19600640 A1 DE19600640 A1 DE 19600640A1
Authority
DE
Germany
Prior art keywords
sensor
motor
speed
pump
centrifugal pump
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.)
Withdrawn
Application number
DE1996100640
Other languages
German (de)
Inventor
Cacho Juan Antonio Dr Lira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilo GmbH
Original Assignee
Wilo GmbH
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
Application filed by Wilo GmbH filed Critical Wilo GmbH
Priority to DE1996100640 priority Critical patent/DE19600640A1/en
Publication of DE19600640A1 publication Critical patent/DE19600640A1/en
Withdrawn legal-status Critical Current

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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0094—Indicators of rotational movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage

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

Abstract

The sensor determines the rpm by detecting the vibrations of the motor (1). The vibrations related to the wear of the motor bearing or bearings, esp. the pump bearing or bearings, are additionally determined by the same sensor (3). The vibrations are evaluated by a microcomputer, which is fixed at the motor. The microcomputer (4) is formed by a single chip, which is integrated in the electronic operating system of the pump motor. The single sensor is a piezoelectric acceleration sensor. The rpm can be determined using Fourier analysis.

Description

Die Erfindung betrifft einen Sensor zum Ermitteln der Drehzahl eines Motors, insbesondere einer Motorkreiselpumpe durch Erfassen der Schwingungen des Motors.The invention relates to a sensor for determining the Speed of an engine, especially one Motor centrifugal pump by detecting the vibrations of the Motors.

Es ist bekannt, die Drehzahl eines Pumpenmotors durch einen Schwingungsmesser zu ermitteln. Ferner ist es bekannt, einen Schwingungsmesser zum Erkennen des Lagerverschleißes einer Pumpe anzuordnen. Um sowohl den Lagerverschleiß als auch die Drehzahl eines Motors zu ermitteln, sind damit zwei Sensoren am Motor anzubringen, so daß ein erheblicher Aufwand erforderlich ist.It is known to control the speed of a pump motor to determine a vibration meter. Furthermore, it is known a vibration meter to recognize the To arrange bearing wear of a pump. To both Bearing wear as well as the speed of an engine two sensors must be attached to the engine, so that a considerable effort is required.

Aufgabe der Erfindung ist es, den konstruktiven Aufwand zum Ermitteln des Lagerverschleißes und der Drehzahl eines Motors, insbesondere einer Motorkreiselpumpe zu verringern.The object of the invention is the design effort to determine bearing wear and speed an engine, in particular a motor centrifugal pump to decrease.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die vom selben Sensor erfaßten Schwingungen zusätzlich bezüglich des Verschleißes der/des Motorlager(s), insbesondere der/des Pumpenlager(s) von einem Mikrocomputer ausgewertet werden, der am Motor befestigt ist.This object is achieved in that the vibrations detected by the same sensor  regarding the wear of the engine mount (s), especially the pump bearing (s) of one Microcomputers are evaluated on the engine is attached.

Somit werden beide Messungen, d. h. der Lagerverschleiß und die Drehzahl mit einem einzigen Sensor durchgeführt, so daß der konstruktive Aufwand erheblich verringert ist. Besonders vorteilhaft ist hierbei, wenn der Mikrocomputer von einem einzigen Chip gebildet ist, der in der Antriebselektronik des Motors integriert ist.Thus both measurements, i.e. H. bearing wear and performed the speed with a single sensor, so that the design effort is significantly reduced. It is particularly advantageous if the microcomputer is formed by a single chip in the Drive electronics of the motor is integrated.

Vorzugsweise wird vorgeschlagen, daß der einzige Sensor ein piezoelektrischer Beschleunigungssensor ist. Auch ist von größtem Vorteil, wenn der Sensor in oder auf dem Gehäuse der Antriebselektronik des Motors befestigt, insbesondere geklebt ist.It is preferably proposed that the only sensor is a piezoelectric acceleration sensor. Is too of great advantage if the sensor is in or on the Housing of the drive electronics of the motor attached, in particular is glued.

Exakte Meßergebnisse werden bei geringem Aufwand erreicht, wenn die Drehzahl durch eine Fourieranalyse ermittelt wird. Auch kann der Lagerverschleißzustand durch eine Trendanalyse ermittelt wird.Exact measurement results are obtained with little effort reached when the speed by a Fourier analysis is determined. The bearing wear condition can also is determined by a trend analysis.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird im folgenden näher beschrieben. Es zeigen:An embodiment of the invention is in the Drawing shown schematically and is in the following described in more detail. Show it:

Fig. 1 eine stirnseitige Ansicht an der Motor­ kreiselpumpe und Fig. 1 is an end view of the motor centrifugal pump and

Fig. 2 einen axialen Längsschnitt durch die Motorkreiselpumpe. Fig. 2 shows an axial longitudinal section through the motor centrifugal pump.

Auf der Oberseite einer Motorkreiselpumpe 1 ist eine Antriebselektronik 2 befestigt, von der in den Fig. 1 und 2 im wesentlichen nur das Gehäuse dargestellt ist. On the top of a motor centrifugal pump 1 , drive electronics 2 are fastened, of which essentially only the housing is shown in FIGS . 1 and 2.

Auf dem Gehäuse der Antriebselektronik 2 oder in dem Gehäuse ist ein Sensor 3 befestigt, der sowohl den Lagerverschleiß als auch die Drehzahl erfaßt.A sensor 3 is attached to the housing of the drive electronics 2 or in the housing and detects both the bearing wear and the speed.

Der Sensor 3 ist ein piezoelektrischer Beschleunigungs­ sensor und wird vorzugsweise in oder auf das Kunststoffgehäuse der Antriebselektronik 2 geklebt. Beide Messungen, d. h. des Lagerverschleißes und der Drehzahl werden durchgeführt, wobei der Lagerverschleißpegel mit der Drehzahl der Pumpe korreliert. Somit wird nur ein einziger Sensor 3 für beide Messungen verwendet.The sensor 3 is a piezoelectric acceleration sensor and is preferably glued in or on the plastic housing of the drive electronics 2 . Both measurements, ie the bearing wear and the speed, are carried out, the bearing wear level correlating with the speed of the pump. Thus, only a single sensor 3 is used for both measurements.

Die Auswertung der Daten erfolgt durch einen Ein-Chip-Mikrocomputer 4, der in die Antriebselektronik integriert ist. Ermittelt werden:The data is evaluated by a one-chip microcomputer 4 , which is integrated in the drive electronics. Be determined:

  • - Der Lagerverschleißzustand anhand einer Trendanalyse und- The bearing wear condition based on a trend analysis and
  • - die Drehzahl mit Hilfe einer Fourieranalyse.- The speed using a Fourier analysis.

Die gewonnenen Informationen können benutzt werden für:The information obtained can be used for:

  • - Vorbeugende Maßnahmen zur Verringerung der Ursachen des Lagerverschleißes der Pumpe,- Preventive measures to reduce the causes bearing wear of the pump,
  • - die Diagnose des Schlupfes der Pumpe,- diagnosis of slippage of the pump,
  • - die Regelung der Drehzahl der Pumpe,- regulation of the speed of the pump,
  • - Vermeidung von Folgeschäden,- avoiding consequential damage,
  • - Erkennung des Blockierens des Motors,- engine blocking detection,
  • - Erkennung und Meldung von unzulässigen Betriebszuständen, - Detection and reporting of impermissible Operating states,  
  • - höhere Betriebssicherheit/Ausfallsicherheit- higher operational safety / reliability
  • - bessere Ausnutzung der Anlage- better use of the system
  • - Objektivität bei der Beurteilung des Zustands der Pumpe.- Objectivity in assessing the state of the Pump.

Claims (6)

1. Sensor zum Ermitteln der Drehzahl eines Motors, insbesondere einer Motorkreiselpumpe durch Erfassen der Schwingungen des Motors, dadurch gekennzeichnet, daß die vom selben Sensor (3) erfaßten Schwingungen zusätzlich bezüglich des Verschleißes der/des Motorlager(s), insbesondere der/des Pumpenlager(s) von einem Mikrocomputer (4) ausgewertet werden, der am Motor (1) befestigt ist.1. Sensor for determining the speed of an engine, in particular a motor centrifugal pump by detecting the vibrations of the engine, characterized in that the vibrations detected by the same sensor ( 3 ) additionally with respect to the wear of the / the motor bearing (s), in particular the / the pump bearing (s) are evaluated by a microcomputer ( 4 ) which is attached to the motor ( 1 ). 2. Sensor nach Anspruch 1, dadurch gekennzeichnet, daß der Mikrocomputer (4) von einem einzigen Chip gebildet ist, der in der Antriebselektronik des Motors integriert ist.2. Sensor according to claim 1, characterized in that the microcomputer ( 4 ) is formed by a single chip which is integrated in the drive electronics of the motor. 3. Sensor nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der einzige Sensor (3) ein piezoelektrischer Beschleunigungssensor ist.3. Sensor according to claim 1 or 2, characterized in that the only sensor ( 3 ) is a piezoelectric acceleration sensor. 4. Sensor nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Sensor (3) in oder auf dem Gehäuse (2) der Antriebselektronik des Motors befestigt, insbesondere geklebt ist. 4. Sensor according to one of the preceding claims, characterized in that the sensor ( 3 ) in or on the housing ( 2 ) of the drive electronics of the motor is attached, in particular glued. 5. Sensor nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Drehzahl durch eine Fourieranalyse ermittelt wird.5. Sensor according to one of the preceding claims, characterized in that the Speed is determined by a Fourier analysis. 6. Sensor nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Lagerverschleißzustand durch eine Trendanalyse ermittelt wird.6. Sensor according to one of the preceding claims, characterized in that the Bearing wear condition determined by a trend analysis becomes.
DE1996100640 1996-01-10 1996-01-10 Sensor for determining speed of motor esp. driving centrifugal pump Withdrawn DE19600640A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996100640 DE19600640A1 (en) 1996-01-10 1996-01-10 Sensor for determining speed of motor esp. driving centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996100640 DE19600640A1 (en) 1996-01-10 1996-01-10 Sensor for determining speed of motor esp. driving centrifugal pump

Publications (1)

Publication Number Publication Date
DE19600640A1 true DE19600640A1 (en) 1997-07-17

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001071363A1 (en) * 2000-03-20 2001-09-27 Abb Research Ltd Method of determining speed of rotation of squirrel-cage motor and a computer software product to carry out the method
WO2001071362A1 (en) * 2000-03-20 2001-09-27 Abb Research Ltd Methof of determining speed of rotation of a motor and a computer software product to carry out the method
DE10147326A1 (en) * 2001-09-26 2003-04-10 Buerkert Gmbh & Co Dienstleist Diagnostic system for switching valves
DE10327261A1 (en) * 2003-06-17 2005-01-13 Disetronic Licensing Ag Device and method for checking a medical device
CN102889216A (en) * 2012-09-05 2013-01-23 江苏大学 Method for measuring flowing induced vibration of centrifugal pump rotor
US11002635B2 (en) 2018-04-25 2021-05-11 Aktiebolaget Skf Signal processing method and device
US11198338B2 (en) 2018-04-25 2021-12-14 Aktiebolaget Skf Device for determining a rotational speed and a vibration of a wheel end of a vehicle

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413046A1 (en) * 1984-04-04 1985-10-17 Universal-Kugellager-Fabrik GmbH, 1000 Berlin MEASURING DEVICE
DE3812474A1 (en) * 1987-04-28 1988-11-10 Koyo Seiko Co DEVICE FOR PREDICTING DESTRUCTION OF A BEARING
DD269683A1 (en) * 1987-12-29 1989-07-05 Bergmann Borsig Veb METHOD FOR SPEED MEASUREMENT OF ROTATING MACHINES
EP0413845A1 (en) * 1989-08-24 1991-02-27 Carl Schenck Ag Method for the early detection of damage to machine elements
DE4036713A1 (en) * 1990-11-16 1992-05-21 Duerrwaechter E Dr Doduco Vehicle speed signalling using tachometer shaft noise - using noise sensor whose signal is analysed to detect conspicuously strongly occurring frequency
GB2252414A (en) * 1991-02-04 1992-08-05 Takata Corp Impact sensing device
DE4113198A1 (en) * 1991-04-23 1992-10-29 Oplaender Wilo Werk Gmbh ELECTRIC MOTOR, IN PARTICULAR CANOPY MOTOR FOR A CENTRIFUGAL PUMP OR A FAN
DE4225783A1 (en) * 1991-08-08 1993-02-11 Doryokuro Kakunenryo DEVICE FOR MONITORING THE WEARING WEAR OF AN AXIAL BEARING IN A SUBMERSIBLE PUMP
DE4303479A1 (en) * 1993-02-06 1994-08-11 Licentia Gmbh Pump unit with a variable speed electric motor
WO1994024537A1 (en) * 1993-04-09 1994-10-27 Monitoring Technology Corporation Method and apparatus for analyzing and detecting faults in bearings and other rotating components that slip
DE4333690C1 (en) * 1993-10-02 1995-02-09 Gsp Ges Fuer Schwingungsunters Mobile device for the analysis of reflected sound for the inspection of sewer pipes from the inside on-site

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413046A1 (en) * 1984-04-04 1985-10-17 Universal-Kugellager-Fabrik GmbH, 1000 Berlin MEASURING DEVICE
DE3812474A1 (en) * 1987-04-28 1988-11-10 Koyo Seiko Co DEVICE FOR PREDICTING DESTRUCTION OF A BEARING
DD269683A1 (en) * 1987-12-29 1989-07-05 Bergmann Borsig Veb METHOD FOR SPEED MEASUREMENT OF ROTATING MACHINES
EP0413845A1 (en) * 1989-08-24 1991-02-27 Carl Schenck Ag Method for the early detection of damage to machine elements
DE4036713A1 (en) * 1990-11-16 1992-05-21 Duerrwaechter E Dr Doduco Vehicle speed signalling using tachometer shaft noise - using noise sensor whose signal is analysed to detect conspicuously strongly occurring frequency
GB2252414A (en) * 1991-02-04 1992-08-05 Takata Corp Impact sensing device
DE4113198A1 (en) * 1991-04-23 1992-10-29 Oplaender Wilo Werk Gmbh ELECTRIC MOTOR, IN PARTICULAR CANOPY MOTOR FOR A CENTRIFUGAL PUMP OR A FAN
DE4225783A1 (en) * 1991-08-08 1993-02-11 Doryokuro Kakunenryo DEVICE FOR MONITORING THE WEARING WEAR OF AN AXIAL BEARING IN A SUBMERSIBLE PUMP
DE4303479A1 (en) * 1993-02-06 1994-08-11 Licentia Gmbh Pump unit with a variable speed electric motor
WO1994024537A1 (en) * 1993-04-09 1994-10-27 Monitoring Technology Corporation Method and apparatus for analyzing and detecting faults in bearings and other rotating components that slip
DE4333690C1 (en) * 1993-10-02 1995-02-09 Gsp Ges Fuer Schwingungsunters Mobile device for the analysis of reflected sound for the inspection of sewer pipes from the inside on-site

Non-Patent Citations (2)

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NILL,R., HIRSCHMANN,K.H.: Ein piezoelektrischer Schwingungserreger für dynamische Untersuchungen. In: messen, prüfen, automatisieren, Sept. 1986, S.553-558 *
NOJACK,Kurt: Lagerschaden-Früherkennung mit der Kurtosis-Methode. In: Elektronik 17/1981, S.55-58 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001071363A1 (en) * 2000-03-20 2001-09-27 Abb Research Ltd Method of determining speed of rotation of squirrel-cage motor and a computer software product to carry out the method
WO2001071362A1 (en) * 2000-03-20 2001-09-27 Abb Research Ltd Methof of determining speed of rotation of a motor and a computer software product to carry out the method
US6697759B2 (en) 2000-03-20 2004-02-24 Abb Research Ltd. Method of determining speed of rotation of a motor and a computer software product to carry out the method
AU2001248389B2 (en) * 2000-03-20 2005-07-07 Abb Research Ltd Method of determining speed of rotation of squirrel-cage motor and a computer software product to carry out the method
AU2001248388B2 (en) * 2000-03-20 2005-08-04 Abb Research Ltd Method of determining speed of rotation of a motor and a computer software product to carry out the method
DE10147326A1 (en) * 2001-09-26 2003-04-10 Buerkert Gmbh & Co Dienstleist Diagnostic system for switching valves
DE10327261A1 (en) * 2003-06-17 2005-01-13 Disetronic Licensing Ag Device and method for checking a medical device
DE10327261B4 (en) * 2003-06-17 2006-03-02 Disetronic Licensing Ag Infusion pump and method for checking an infusion pump
CN102889216A (en) * 2012-09-05 2013-01-23 江苏大学 Method for measuring flowing induced vibration of centrifugal pump rotor
US11002635B2 (en) 2018-04-25 2021-05-11 Aktiebolaget Skf Signal processing method and device
US11198338B2 (en) 2018-04-25 2021-12-14 Aktiebolaget Skf Device for determining a rotational speed and a vibration of a wheel end of a vehicle

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8141 Disposal/no request for examination