WO2010081694A2 - Dispositif destiné à relier une unité d'entraînement à moteur électrique avec une unité de pompe - Google Patents

Dispositif destiné à relier une unité d'entraînement à moteur électrique avec une unité de pompe Download PDF

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Publication number
WO2010081694A2
WO2010081694A2 PCT/EP2010/000160 EP2010000160W WO2010081694A2 WO 2010081694 A2 WO2010081694 A2 WO 2010081694A2 EP 2010000160 W EP2010000160 W EP 2010000160W WO 2010081694 A2 WO2010081694 A2 WO 2010081694A2
Authority
WO
WIPO (PCT)
Prior art keywords
pump unit
drive unit
lantern
unit
sensor
Prior art date
Application number
PCT/EP2010/000160
Other languages
German (de)
English (en)
Other versions
WO2010081694A3 (fr
Inventor
Olivier Triahn
Laurent Costaouec
Original Assignee
Wilo Se
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 Se filed Critical Wilo Se
Priority to CN2010800089320A priority Critical patent/CN102333959A/zh
Priority to EP10700707.2A priority patent/EP2376786B1/fr
Publication of WO2010081694A2 publication Critical patent/WO2010081694A2/fr
Publication of WO2010081694A3 publication Critical patent/WO2010081694A3/fr

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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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • 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
    • 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

Definitions

  • the invention relates to a device for connecting an electromotive drive unit with a pump unit, with a lantern, which surrounds mechanical connection means for driving the pump unit by the drive unit and to which at one end the drive unit and at an axially opposite end side, the pump unit at least indirectly connected.
  • the lantern connects the pump unit to the drive unit mechanically in the manner of a block construction.
  • the lantern is a sleeve-shaped component, which surrounds drive means, wherein the drive means are at one end rotatably connected to the pump unit and the other end rotatably connected to the drive unit.
  • the connection between the lantern and the pump unit on the one hand and the drive unit on the other hand is usually done by flanges.
  • the pump axis, the drive shaft of the drive unit and the axis of the lantern are aligned with each other so that they lie on a common line.
  • the connecting means enclosed by the lantern can be formed, for example, by a clutch or by a gear, wherein the clutch or the transmission is rotatably connected at its or its drive side to a drive shaft of the drive unit, and the output side of the clutch or the transmission rotationally fixed is connected to a pump shaft at the end of which is an impeller to promote a liquid medium during operation of the pump unit.
  • the impeller driving shaft is usually a mechanical seal, in particular a mechanical seal used.
  • the mechanical seal is surrounded by the pumped liquid in the operation of the pump, which acts on the one hand as a lubricant for the mechanical seal on the other hand, but also as a coolant.
  • EP 1 510 698 A2 discloses a dry run protection for a drive electric motor and a pump, comprising a pipe fitting connected to the pump housing with a fluid detector in the form of a capacitive level switch.
  • the pipe fitting comprises a solenoid valve for actuating a vent, wherein the solenoid valve and fluid detector are connected together to an electronics, the operating state displays and their spatial arrangement, regardless of the location of the pump system, although freely selectable, but is preferably arranged spatially separated from the dry run protection on the pump ,
  • Another disadvantage of a decentralized monitoring electronics is that a pump technician does not see a BethebsShsan Attache the monitoring electronics on the one hand and the pump unit on the other hand at the same time. Rather, he needs to switch back and forth to check the electronics and the unit between them.
  • a verification of the fault conditions displayed on the monitoring electronics with the actually applied to the pump unit state is not possible because of the decentralized arrangement, as displayed on the monitoring electronics fault conditions can not be checked by a visual inspection of the pump unit or a review of the same for acoustic abnormalities, if the pump technician located in the monitoring center or on the control cabinet.
  • An arrangement of a monitoring electronics on the motor housing would lead to various disadvantages.
  • the monitoring electronics would be exposed to the waste heat generated by the engine, which damages the individual components, in particular leads to a faster aging of the same.
  • the strong electromagnetic field of the electric motor significantly influences the measurement data processing of the monitoring electronics.
  • high requirements for shielding the electromagnetic field of the electric motor would also be necessary here. This also leads to significantly higher costs and a much higher technical Effort for the structural design of the monitoring electronics.
  • Another disadvantage of the arrangement of a monitoring electronics on the motor housing is necessary for the monitoring electronics space. Pump units are often placed in particularly difficult to reach places and especially in confined spaces. Furthermore, in the arrangement of several pump units side by side of the available space is severely limited. A monitoring electronics receiving housing on the motor housing would protrude radially from this and thus make the installation of such a pump unit in a confined space impossible depending on the arrangement on the motor housing.
  • a device for connecting an electromotive drive unit to a pump unit, which comprises a lantern, which surrounds the mechanical connection means for driving the pump unit by the drive unit and at least one of the drive unit and at the axially opposite end of the pump unit at least indirectly, wherein on or in the lantern a monitoring electronics for detecting the operating state of the pump and / or the Drive unit is arranged.
  • a particular advantage of this device is its independence from the motor model used for the electric motor drive unit.
  • a standard motor can be used without this having to have special fastening means or electrical contact means for the monitoring electronics.
  • the pump unit is therefore qualified in a modular design that allows easy replacement of the unit components.
  • the monitoring electronics Due to the arrangement of the monitoring electronics in or on the lantern of a pump unit considered in the radial direction to the drive axis of the pump unit no additional space required. This results from the fact that the device is arranged axially between the drive unit and the pump unit.
  • the connection between the device according to the invention and the drive unit on the one hand and the device and the drive unit on the other hand can be done by mounting flanges.
  • the lantern In its internal structure, the lantern is set back from the outer dimensions of the flanges in the radial direction. As a result, sufficient space is provided in the area between the lantern and the diameter of the flanges in the radial direction for the reception of the monitoring device forming electrical and electronic components.
  • the monitoring electronics are therefore preferably designed such that they do not protrude substantially beyond the diameter of the flanges in the radial direction.
  • a pump unit designed with such a device can be installed in particular in those installation situations in which the available installation space in the radial direction is just a little larger than the maximum flange diameter.
  • the lantern is sleeve-shaped and arranged between the drive unit and the pump unit. Through them run mechanical drive means by means of which the drive unit drives the pump unit. These connecting means may be formed for example by a rigid connection, alternatively by a clutch or a transmission. Because the lantern is located between the drive unit and pump unit, the monitoring electronics between the pump unit and the drive unit is arranged.
  • the monitoring electronics or a housing enclosing them is not arranged on the outer peripheral surface of the electric motor housing or on the pump unit and thus substantially in the radial direction does not protrude beyond the diameter of the mounting flange, which connects the drive unit with the device.
  • the advantage of the arrangement of the monitoring electronics in or on the lantern is in addition to the reduced space requirement in that the monitoring electronics on the one hand thermally away from the waste heat generating drive unit and possibly a hot liquid pump unit and spaced on the other hand is also electromagnetically spaced from the stray fields of the drive unit, so that related interference can be minimized and appropriate shielding measures can be low.
  • the direct arrangement of the monitoring unit in or on the lantern connecting the drive unit and the pump unit furthermore has the advantage that no additional electrical lines need to be laid to a remote monitoring center or a control cabinet. As a result, significant costs and labor can be saved. Moreover, when checking the pump unit, the pump technician has the option of verifying this on the pump unit itself in addition to the operating status displayed on the monitoring electronics.
  • the monitoring electronics can be connected to detect the operating state with a sensor arrangement comprising at least one sensor.
  • the sensor detects a physical operating variable of the pump unit or the drive unit, on the basis of which the operating state of the pump unit can be derived.
  • the electronics may preferably have a measurement data processing for processing the measurement signals of the sensor arrangement. The measured signals detected by the sensor arrangement can thus be processed and evaluated directly in the monitoring electronics.
  • the lantern may be enclosed by a housing, wherein the electronics are arranged within the housing.
  • the housing protects the electronics and shields them from the outside.
  • the device can be made particularly compact.
  • the housing may be cylindrical and have substantially the same dimensions in diameter as the mounting flanges.
  • the housing surrounding the lantern may alternatively also be rectangular in cross-section with rounded edges and concave in the radial direction, i. be shaped slightly outwardly curved side surfaces, so that the housing of the device may protrude in places slightly beyond the diameter of the drive unit with the device connecting mounting flange. This increases the space available for the electronics and sensors within the device. Furthermore, the device is visually appealing and compact.
  • the first sensor may be a pressure sensor for detecting the pressure within the lantern or the pump unit, whereby a pressure drop can be detected within the lantern or the pump unit, which is an indication of an incipient dry run, namely, if the fluid level within the pump unit
  • the pressure sensor may be a first sensor of a differential pressure sensor and, for example, detect the pressure-side pressure of the pump unit, wherein a further pressure sensor may be provided which the suction-side pressure of the pump unit
  • the entirety of the two pressure sensors is referred to below as the differential pressure sensor.
  • the sensor assembly may include a second sensor that is a first temperature sensor for sensing the temperature of a mechanical seal within the lantern or pump unit.
  • the mechanical seal may in particular be a mechanical seal, wherein the temperature sensor is preferably arranged in the region of this mechanical seal for detecting its temperature.
  • the combined use of a temperature sensor and a pressure sensor leads to a reliable dry run detection in the monitoring electronics, which can also indicate the failure of a dry run when in existence.
  • the sensor arrangement can have a vibration sensor which is in mechanical connection with the pump unit, the device according to the invention and / or the drive unit. It may preferably be designed as an acceleration sensor and detect mechanical vibrations on the pump unit.
  • a vibration sensor can be determined whether, for example, a bearing damage or in the other rotating components imbalance is present, which leads to mechanical vibrations of the pump unit.
  • Such vibrations not only cause an unpleasant noise but also represent a significant mechanical load on all components of the pump unit, which significantly reduces the life of these components. Vibrations can also be caused by installation errors, namely, when the individual components of the pump unit are not optimally aligned with each other. If the vibrations are initially low, incipient mechanical wear on the rotating mechanical components, in particular on the bearings, can be detected and displayed on the monitoring electronics.
  • the sensor arrangement may further comprise a speed and / or a direction of rotation sensor.
  • the monitoring electronics can thus monitor the speed and / or the direction of rotation of the drive unit or the pump unit.
  • it may also intervene in the control of the drive unit based on an evaluation of a rotational speed measurement or a rotational direction sensor value in order to prevent damage to the pump unit. For example, as a result of the penetration of a foreign body into the pump chamber, the impeller could be blocked.
  • the drive unit would then apply their maximum available torque, which can lead to overheating of the drive unit and in the worst case to destruction of the pump set. Through a speed monitoring this case of a pump blockage can be reliably detected and brought by means of the monitoring electronics to the display.
  • the sensor arrangement may have a second temperature sensor for detecting the ambient temperature inside or outside the device. This can be detected, for example, that or when the pumped pump medium or the temperature of the room within which the pump unit is placed, reaches an unacceptably high value, which can lead to damage to individual components of the pump unit.
  • the second temperature sensor By means of the second temperature sensor, an unacceptable thermal stress on the components of the pump unit can be detected in good time by the monitoring electronics and also displayed.
  • the measurement data processing is microprocessor-controlled.
  • the measured data processing can be set up to generate one or more operating state signals of the drive unit and / or the pump unit from the measuring signal of the sensor or the measuring signals of the sensors.
  • the monitoring electronics can have a memory which is associated with the measurement data processing. Measured sensor values can be stored in this memory and made available for the measurement data processing. Furthermore, operating state signals generated by the measurement data processing or operating state values representing these operating state signals can also be stored in the memory, so that they can be read out of the monitoring electronics at a later time by a pump technician. In this way, the pump technician can be told a history of the operating conditions of the pump unit, so that this can determine the cause of a pump failure or pump damage or early detect such.
  • the display means may be formed for example by light-emitting diodes or by a display.
  • the device has a communication interface for the remote transmission of data.
  • the transferable data may be operating state, measurement or control data.
  • data can be read out of the memory via the communication interface, ie the current operating state or operating states of the pump set lying in the past can be queried. It is also possible via such a communication interface to specify operating parameters for the pump unit, for example one Speed specification or limit value specification.
  • Both a remote reading and a remote control and / or remote maintenance can take place via the communication interface.
  • a communication interface for example, a CAN BUS interface or an infrared interface can be used.
  • this has an electrical power supply for supplying the electronics, wherein the power supply may include a voltage converter.
  • the power supply may include a voltage converter.
  • Figure 1 schematic representation of an inventive
  • Figure 2a Section A-A through the device of Figure 1
  • Figure 2b Alternative embodiment of the device of Figure 1 with a
  • the device 3 comprises a lantern 4, within which not shown mechanical connecting means for driving an impeller within a pump chamber of the pump unit 2 are rotatably arranged by the drive unit 1.
  • the pump unit 2 has a suction side 6 and a pressure side 7.
  • the lantern 4 is sleeve-shaped, is formed by webs 9a, which are fastened at its two ends in each case to a flange 9c, and surrounds circumferentially said connecting means.
  • the lantern comprises covering means 9b, for example in the form of a grid, in order to shield the rotating connecting means.
  • the lantern 4 is connected at its axial end faces via the flanges 9 c by means of which at one end the drive unit 1 and the other end the pump unit 2 to the lantern 4.
  • a monitoring electronics 5 for detecting the operating state of the pump unit 2 and / or the drive unit 1 is arranged.
  • the electronics 5 is limited to the outside by a housing wall 8 of the device 3.
  • the electronics 5 is thus arranged between a web 9 a of the lantern 4 and the housing wall 8 of the device 3.
  • the housing wall 8 is substantially cylindrical in cross-section, but preferably square designed with rounded edges and viewed in the radial direction slightly outwardly curved side surfaces.
  • the diameter of the housing wall 8 substantially corresponds to that of the flanges 9c or that of the electromotive drive unit 1, so that the housing wall 8 is substantially flush with the electric motor housing of the drive unit 1. However, it can also be used a smaller diameter drive unit.
  • FIG. 2a The cross section AA of the device 3 according to the invention is shown in FIG. 2a.
  • the housing wall 8 is aligned concentrically with the lantern 4. Between the lantern 4, respectively a web 9a, and the housing wall 8, the electronics 5 is arranged. It has display elements 10 for displaying the operating state of the pump unit 2 and / or the drive unit 1. Between the housing wall 8 and the lantern 4, a power supply 11 with a voltage converter 12 is arranged in the device 3 in addition, which supplies the electronics 5 with voltage.
  • FIG. 2b An alternative embodiment variant is shown in FIG. 2b. In this embodiment, the monitoring electronics 5 between the webs 9a of the lantern 4, that is arranged between the cover 9b and the housing wall 8, whereas the power supply 11 between a web 9c of the lantern 4 and the housing wall 8 is arranged.
  • a pressure sensor 14 is provided for detecting the pressure within the pumping chamber.
  • a first temperature sensor 15 is arranged in the region of a mechanical seal. This is also metrologically connected to the monitoring electronics 5, and provides this information about the current temperature in the region of the mechanical seal.
  • a vibration sensor 13 is shown in Figure 1, which is in mechanically fixed operative connection with the lantern 4 and thus detects the mechanical vibrations on the pump unit.
  • FIG. 3 shows a schematic representation of the device 3 concerning the electrical and electronic components of the device 3.
  • the device 3 comprises an input side terminal side 18, with electrical inputs 19, 20 for connecting an electrical supply voltage 19 of a supply network and for a ground terminal 20. Further includes the connection side 18 terminals 21 for connecting various sensors 14, 15, 17 with the electronics 5, in particular a pressure sensor 14 for arrangement within the pump chamber, a temperature sensor 15 for arrangement in close proximity to the mechanical seal and a speed and direction indicator 17, for arrangement at the pump shaft.
  • the device 3 may further comprise an ambient temperature sensor 16 for detecting the temperature in the immediate vicinity of the lantern 4 or the housing 8 and the vibration sensor 13 arranged on the lantern 4.
  • the sensors 13, 14, 15, 16 and 17 together form the sensor arrangement 22.
  • the monitoring electronics 5 is shown in FIG.
  • the measurement data processing 23 includes individual signal processing units 23a, 23b, 23c, 23d, and 23e.
  • a first frequency signal processing unit 23a the frequency signal of the power supply voltage supplying the electronics of the power supply 11 is supplied.
  • a speed signal processing unit 23b is supplied with the measurement signal of the speed and direction sensor 17.
  • a temperature signal processing unit 23 c is supplied with the temperature measurement values of the sensors 15 and 16.
  • a dry running signal processing unit 23d is supplied with the measurement signal of the pressure sensor 14.
  • a vibration signal processing unit 23e is provided in the measurement data processing to which the measurement signal of the vibration sensor 13 is supplied.
  • the individual units 23a to 23e of the measurement data processing 23 perform a first processing and conditioning of the acquired measured values. This can be, in particular, filtering, amplification, optionally also discretization of the continuous measured values by scanning.
  • the processed measurement signals are respectively supplied to inputs of the microprocessor 24, which may be formed either as analog or digital inputs.
  • the microprocessor 24 carries out the actual monitoring of the operating state of the pump unit by comparing the current measured variables with variables valid for the normal case. If a comparison with the given values results in an impermissibly high deviation, the microprocessor 24 outputs a corresponding error message at at least one output. Furthermore, the microprocessor 24 can also output the current vibration value, the direction of rotation and / or a switching signal for actuating a relay 25 at one of its outputs.
  • the output values may be used for direct display on the display device 10. For example, two light-emitting diodes 10b or a two-color light-emitting diode 10b, for example with the colors red / green as display means, can convey a visual indication of the fault condition of the pump unit.
  • a bar graph 10b may represent the current vibration level on the pump set.
  • two light-emitting diodes 10c or a two-color light-emitting diode 10c can reproduce the direction of rotation of the pump unit on the display 10.
  • the display unit 10 also include a light emitting diode 10a that indicates whether the monitoring electronics are powered on, respectively powered or disabled. This status indicator 10a may be directly in communication with the power supply 12, alternatively connected to the microprocessor 24.
  • the relay 25 activated by the microprocessor 24 in the event of a fault can give an error message via an interface contact 28a to an interface 28 to an external signaling device, for example a control center.
  • the microprocessor 24 may include an infrared communication interface for signal transmission between the device 3 and an external device such as a portable computer or a PDA (Personal Digital Assistant).
  • the microprocessor 24 may also provide a CAN (Controller-Area Network) bus output for a CAN bus signal transmission, the interface 28 having a corresponding bus port 28b for connecting the device 3 to a CAN bus.
  • CAN Controller-Area Network
  • All of the aforementioned components are components of the device 3 and according to the invention at least partially disposed between the lantern 4 and the housing wall 8, wherein individual sensors for detecting a suitable for the determination of the operating state of the pump unit size can also be arranged within the lantern 4 or the pump unit 2 ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

L'invention concerne un dispositif (3) destiné à relier une unité d'entraînement (1) à moteur électrique avec une unité de pompe (2). Le dispositif comprend une lanterne (4) qui entoure des éléments de liaison mécaniques destinés à l'entraînement de l'unité de pompe (2) par l'unité d'entraînement (1) et à laquelle se raccordent, au moins indirectement, l'unité d'entraînement (1) sur une face et l'unité de pompe (2) sur la face axialement opposée. Il est prévu sur ou dans la lanterne (4) une électronique de surveillance (5) destinée à détecter l'état de fonctionnement de l'unité de pompe (2) et/ou de l'unité d'entraînement (1). L'invention concerne en outre un groupe de pompage avec un tel dispositif (3), qui relie l'unité d'entraînement (1) avec l'unité de pompe (2) du groupe de pompage.
PCT/EP2010/000160 2009-01-15 2010-01-14 Dispositif destiné à relier une unité d'entraînement à moteur électrique avec une unité de pompe WO2010081694A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010800089320A CN102333959A (zh) 2009-01-15 2010-01-14 用于连接电机式驱动单元与泵单元的设备
EP10700707.2A EP2376786B1 (fr) 2009-01-15 2010-01-14 Dispositif destiné à relier une unité d'entraînement à moteur électrique avec une unité de pompe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009005154.6 2009-01-15
DE102009005154A DE102009005154A1 (de) 2009-01-15 2009-01-15 Vorrichtung zur Verbindung einer elektromotorischen Antriebseinheit mit einer Pumpeneinheit

Publications (2)

Publication Number Publication Date
WO2010081694A2 true WO2010081694A2 (fr) 2010-07-22
WO2010081694A3 WO2010081694A3 (fr) 2010-10-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/000160 WO2010081694A2 (fr) 2009-01-15 2010-01-14 Dispositif destiné à relier une unité d'entraînement à moteur électrique avec une unité de pompe

Country Status (5)

Country Link
EP (1) EP2376786B1 (fr)
KR (1) KR20110110319A (fr)
CN (1) CN102333959A (fr)
DE (1) DE102009005154A1 (fr)
WO (1) WO2010081694A2 (fr)

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DE102020108893A1 (de) 2020-03-31 2021-09-30 Nidec Gpm Gmbh Elektromotorisch angetriebene Fluidpumpe, Verfahren zum Betreiben einer elektromotorisch angetriebenen Fluidpumpe und Fahrzeug aufweisend die elektromotorisch angetriebene Fluidpumpe
WO2022066482A1 (fr) * 2020-09-25 2022-03-31 Cornell Pump Company Cavité de montage pour dispositif de surveillance d'équipement à distance
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3376042A1 (fr) 2017-03-13 2018-09-19 Grundfos Holding A/S Système de montage permettant de monter une unité de surveillance sur une pompe

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EP2376786B1 (fr) 2017-09-13
CN102333959A (zh) 2012-01-25
EP2376786A2 (fr) 2011-10-19
KR20110110319A (ko) 2011-10-06
DE102009005154A1 (de) 2010-07-22
WO2010081694A3 (fr) 2010-10-21

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