EP1637741A1 - Pompe et son unité de contrôle refroidie par le liquide pompé - Google Patents

Pompe et son unité de contrôle refroidie par le liquide pompé Download PDF

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Publication number
EP1637741A1
EP1637741A1 EP04450177A EP04450177A EP1637741A1 EP 1637741 A1 EP1637741 A1 EP 1637741A1 EP 04450177 A EP04450177 A EP 04450177A EP 04450177 A EP04450177 A EP 04450177A EP 1637741 A1 EP1637741 A1 EP 1637741A1
Authority
EP
European Patent Office
Prior art keywords
pump
liquid
housing
control device
pump control
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Withdrawn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
EP04450177A
Other languages
German (de)
English (en)
Inventor
Manfred Ing. Sacher
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.)
Xylem Water Solutions Austria GmbH
Original Assignee
Pumpenfabrik Ernst Vogel 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 Pumpenfabrik Ernst Vogel GmbH filed Critical Pumpenfabrik Ernst Vogel GmbH
Priority to EP04450177A priority Critical patent/EP1637741A1/fr
Priority to CA002511423A priority patent/CA2511423A1/fr
Priority to US11/181,203 priority patent/US20060078444A1/en
Publication of EP1637741A1 publication Critical patent/EP1637741A1/fr
Withdrawn legal-status Critical Current

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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
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • 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
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit

Definitions

  • the invention relates to a pump control device having a housing and a speed controller arranged in the housing, in particular frequency converter, for controlling the rotational speed of an electric drive motor of a liquid pump. Furthermore, the invention relates to a liquid pump arrangement.
  • Speed controllers in pump controllers have electronic power components that heat up significantly during operation. To protect these power components from burning through, the resulting heat must be dissipated. This is done via heat sink with cooling fins, fans or the like to deliver the heat by convection or a forced air flow to the environment. Pumps are also known in which the speed controller is liquid-cooled.
  • a motor pump with a cooled frequency converter and an electric motor wherein the frequency converter has a plate as a heat sink, on which at least one heat generating electronic component is attached, the plate is in particular perpendicular to the engine rotational axis and of a diverted part of the pumped medium is coolable.
  • a pump unit which has an electric motor cooled by a partial flow of the conveying fluid with a rotor sealed with respect to the conveying fluid.
  • the electric motor drives a centrifugal pump.
  • Upstream of the electric motor is a frequency converter for controlling the speed of the pump unit.
  • the diverted to cool the electric motor and the frequency converter partial flow of the pumped liquid flows through a cooling jacket, which encloses the motor circumferentially.
  • On the outside of this cooling jacket of the frequency converter is mounted heat-conducting, which is arranged with the motor in a common housing.
  • a disadvantage of these known pumps with liquid-cooled frequency converter is on the one hand her mechanically complicated structure, the complex housing and Pipe designs required to divert the desired partial flow from the fluid to lead to the heat sink of the frequency converter now and then.
  • the cleaning of the partial flow pipelines requires a laborious dismantling of the pump.
  • there is a risk that the clogging of the lines for conveying the partial flow to the heat sink of the frequency converter or away from it is not noticed in time, as their clogging does not affect the total pumping capacity of the pump. It is thus necessary to electronically monitor possible overheating of the frequency converter.
  • the present invention has for its object to provide a pump control device in which the described problems of the prior art are avoided.
  • the pump control device has a housing in which a speed controller, for example a frequency converter, for controlling the speed of an electric drive motor of a fluid pump is arranged.
  • the housing has a section with good thermal conductivity, on which a cavity is formed, which has connections for connecting, on the one hand, to the outlet of a fluid pump to be controlled by the pump control device and, on the other hand, with pipelines, so that the Cavity with the entire funded by the liquid pump fluid flow can be flowed through, wherein the speed controller is thermally conductively connected to the housing portion with good thermal conductivity, ie the housing portion with good thermal conductivity serves as a heat sink for the speed controller.
  • the advantages of the pump control device according to the invention are manifold. It should be emphasized its versatility, as it can be connected to existing commercial, unregulated liquid pumps to give these pumps subsequent control functions.
  • the mechanical construction of the pump control device according to the invention is simple, solid and robust, so that it can be used reliably even in harsh operating environments.
  • Particularly noteworthy is also the high cooling capacity of the pump control device according to the invention, since the entire funded liquid flow of a pump controlled by the pump control unit is used to cool the speed controller. Thus, under all operating conditions sufficient cooling power reserves, and it can account for an electronic monitoring of the temperature in the pump control unit.
  • the pump control device is maintenance-free and insensitive to clogging by foreign bodies in the pump delivery flow, as may be entrained by use of the total flow of fluid possibly present foreign bodies in the fluid from the liquid flow and also in the housing of the pump control unit no bottlenecks are present. Rather, by using the total flow of fluid for cooling the speed controller, the cavity of the housing portion and the connections are dimensioned so large that their clogging by foreign bodies is extremely unlikely. It should be noted that the delivery liquid is forced under the full pump pressure through the housing of the pump control unit.
  • the installation of the pump control unit according to the invention to a pump or the removal of the pump can be done in a few steps and requires no special tools or special knowledge.
  • heat-generating components of the speed controller directly on the housing portion with good thermal conductivity to dissipate the heat.
  • heat-generating components of the speed controller may be connected via heat conducting means to the housing portion with good thermal conductivity.
  • the housing portion with good thermal conductivity in one piece preferably as a casting is formed.
  • the housing section with good thermal conductivity of metal or a metal alloy, such as brass is preferable to manufacture the housing section with good thermal conductivity of metal or a metal alloy, such as brass.
  • this pressure in the cavity can be advantageously used as an actual value for pump control, including a passage opening is provided in the cavity for connecting a sensor.
  • the pump control device In order to be able to cool uniformly well different sized electronic components of the speed controller, is provided in a further embodiment of the pump control device that are designed to accommodate large components such as electrolytic capacitors or coils in the housing section recesses which protrude into the cavity or arranged adjacent to a cavity wall are.
  • connection possibility of the pump control device to a pump or pipes is given if the connections of the housing section are formed with good thermal conductivity as flanges or sleeves.
  • the housing section with good thermal conductivity is designed as a housing bottom, which can be connected to a housing cover in a liquid-tight manner is. Thus, even high humidity can not lead to condensation inside the housing.
  • the invention further comprises a liquid pump arrangement having a liquid pump and an electric drive motor driving the liquid pump, wherein a pump control device according to the invention controlling the drive motor is connected to the output of the liquid pump.
  • a frequency converter away from an electric pump drive motor and to transmit the electrical signals of the frequency converter via cables to the electric drive motor.
  • EMC electromagnetic compatibility
  • the pump control device has a remote operating part which communicates via control lines with the pump control unit. It facilitates thereby the use of the pump for a user substantially, since the pumps usually have to be installed in hard to reach places or are sunk in wells, whereas the control panel can be mounted in a location easily accessible to the user. Long cables between the control panel and the pump control unit are no problem because the control signals on these cables have only low currents and low voltages.
  • control lines between the control unit and the pump control unit also for supplying electrical energy to the pump control unit and the electric drive motor used.
  • the electrical power signals represent high power signals, they are sinusoidal and have the low power frequency of 50-60 Hz, so they produce no appreciable noise.
  • the control signals can be modulated on a carrier frequency, superimposed on the supply signals and separated in the pump controller.
  • the liquid pump is designed as a submersible pump.
  • the liquid pump assembly is thereby introduced into a well, where it is located in the liquid to be pumped and the pump control device according to the invention is not only cooled by the flow of the entire liquid flow, but is also cooled from the outside by the liquid located in the well.
  • a frequency converter directly into an electric drive motor and bring in a well, but these were always tailored to the specific engine individual constructions that were naturally produced only in small quantities and therefore were correspondingly expensive and uneconomical.
  • the solution according to the invention also makes it possible to retrofit existing submersible pumps and thus to come to high volumes in the production.
  • the known drive motors with built-in frequency converter always partial flows of liquid have been used, which had to be branched off somewhere.
  • submersible pumps can be introduced into drill pipes, they have a substantially rotationally symmetrical about a longitudinal axis housing shape.
  • a submersible motor pump assembly according to the invention is provided to connect the pump control unit substantially coaxially with the submersible pump.
  • a pressure sensor which is used to control the pump, is integrated into the pump control unit.
  • the pressure measured by the pressure sensor only has to be added to the additional head resulting from the depth of the positioning of the liquid pump in the liquid to be delivered.
  • FIG. 1 shows a housing section with good thermal conductivity of a pump control device according to the invention in a bottom view
  • FIG. 2 shows the housing section in section along the line AA of FIG. 1
  • FIG. 3 shows the housing section in section along the line BB of FIG. 5 is a perspective view of the housing portion obliquely from below
  • Figures 6 and 7 are perspective views of a first embodiment of a liquid pump assembly according to the invention with a mounted on a pump pump control device according to the invention
  • FIG. 9 shows a cross-section through the pump control unit used in the fluid pump arrangement of FIG. 8.
  • a liquid pump assembly having a liquid pump 100 driven by an electric motor 103.
  • the liquid pump 100 has an inlet port 101 into which a liquid flow is drawn (arrow IN), and an outlet port 102 from which the liquid flow conveyed by the pump is discharged.
  • an inventive pump control unit 1 is mounted, comprising a housing, consisting of a cover 2 and a housing formed as a housing bottom portion 3, in which a speed controller is added.
  • a display of a pressure gauge 14 is integrated in the housing cover 2, a display of a pressure gauge 14 is integrated.
  • the speed controller may be designed differently.
  • the electric motor 103 is, for example, a three-phase motor, an electronic frequency converter is used as the speed controller, in the case of DC motors a thyristor converter or a voltage regulator is used.
  • the pump control unit 1 has a port 7, which is liquid-tightly connected to the outlet port 102 of the pump 100, so that the entire pumped by the pump 100 liquid flow flows into the port 7 and, after a not shown Cavity in the housing section 3 has flowed through, exits from a formed in the housing section 3 terminal 5 again (arrow OUT).
  • a cable outlet 16 can be seen on the housing section 3, can be performed by the control and power supply cable from the pump control unit 1 to the motor 103.
  • FIGS. 1 to 5 illustrate the housing section 3 in different views.
  • the housing portion 3 is made as a casting of a metal alloy, such as brass, and therefore has excellent heat conduction properties. It forms a housing bottom, in which a speed control device 20 (see Figures 2 and 3) is added.
  • a speed control device 20 see Figures 2 and 3
  • the terminals 5, 6, 7 On the underside of the housing section 3, a cavity 4 is formed, the terminals 5, 6, 7 has.
  • the connections 5, 6, 7 can be formed with flanges or as sleeves.
  • Each of these ports 5, 6, 7 may be connected to the outlet of a fluid pump to be controlled by the pump controller and thus act as an input port or serve as an output port by being connected to tubing which carries the fluid flow to a consumer.
  • connection 7 designed as a sleeve
  • the connection 7 is pushed over the outlet connection 102 of the pump 100 and therefore absorbs the entire liquid flow delivered by the pump 100.
  • the liquid stream flows through the cavity 4 and is discharged again at the connection 5 of the cavity 4.
  • the housing portion 3 thus forms an extremely efficient, liquid-cooled heat sink for the speed controller 20, the electronic power components are thermally conductively connected to the housing portion 3.
  • some of the heat-generating components 21, 22 of the speed controller 20 are directly against a wall of the housing portion 3 and are cooled by the direct contact, wherein by planar forming the contact surface for the components 21, 22 on the housing portion. 3 ensures good heat transfer.
  • FIG. 2 shows that the heat-generating components 21, 22 of the speed controller 20 are directly against a wall of the housing portion 3 and are cooled by the direct contact, wherein by planar forming the contact surface for the components 21, 22 on the housing portion. 3 ensures good heat transfer.
  • other components 23, 24 of the speed controller 20 are connected to the housing section 3 via heat conducting means 30.
  • two cup-shaped recesses 8, 9 are formed in the housing portion 3, which extend adjacent to the cavity 4, wherein the boundary walls of the cavity 4 and portions of the walls of the cup-shaped recesses 8, 9 form.
  • the recesses 8, 9 are liquid-tight with respect to the cavity 4 are separated.
  • the Components 23, 24, for example, large-volume components such as electrolytic capacitors or coils are inserted into the recesses 8, 9 and encapsulated with heat conduction 30 so that best thermal conductivity between these components and the walls of the wells 8, 9, whereby the cavity 4 flowing through Liquid is optimally used to cool the components 23, 24.
  • the cavity 4 of the housing section 3 of the pump control device 1 is flowed through by the entire conveyed liquid flow of the pump 100, wherein in the cavity 4 substantially the delivery pressure generated by the pump prevails.
  • This pressure can be used as the actual value for controlling the pump. Therefore, in the housing section 3, a passage opening 15 is formed in the wall separating the housing interior from the cavity 4.
  • This passage opening 15 has a thread, so that a sensor, such as e.g. a manometer, liquid-tight can be screwed, whose signals are evaluated by the speed controller.
  • 3 through openings 10, 11, 12, 13 are formed in the housing section, can be passed through the cable, not shown, for communication between speed controller and pump motor and for the power supply of the speed controller.
  • spouts, bushes, etc. can be arranged at the passage openings 10, 11, 12, 13.
  • Fig. 8 shows a second embodiment of a liquid pump assembly according to the invention in side view, partially in section.
  • the fluid pump assembly is housed in a wellbore 110. It comprises a liquid pump 100 'designed as a submersible pump and an electric drive motor 103' driving the liquid pump 100 ', and an inventive pump control device 1' which is connected to the outlet 102 'of the liquid pump 100'.
  • the pump control device 1' has a housing consisting of a cylindrical outer wall 2 'and a hollow cylindrical inner wall 3' by a not closer illustrated speed controller, in particular frequency converter, for controlling the rotational speed of the electric drive motor 103 'is arranged.
  • the hollow cylindrical inner wall 3 ' consists of a material with good thermal conductivity and defines in its interior a cylindrical cavity 4', which - as shown in FIG. 8 - connections 5 ', 6' for connecting to the output 102 'of the pump 100' or with a conduit 109.
  • the outer shell of the hollow cylindrical inner wall 3 'in this embodiment has a hexagonal configuration, whereby it has six flat outer surfaces on which electronic power components 21', 22 'of the speed controller, such as thyristors or capacitors can be mounted flat, for optimal cooling, for example by Screw on with prior introduction of a thermal grease.
  • the hollow cylindrical inner wall 3 ' may be, for example, a one-piece extruded profile tube made of metal.
  • the cylindrical outer wall 2' After mounting the speed controller, in particular the electronic power components 21 ', 22' on the hollow cylindrical inner wall 3 ', the cylindrical outer wall 2' is slipped over this arrangement and sealingly connected to the inner wall 3 '.
  • the pump controller 1 ' has a remote keypad 104 mounted in an easily accessible location for an operator.
  • the control unit 104 communicates via a control line 106 with the pump control unit 1 '.
  • a power supply cable 105 leads to the operating part 104 and, on the one hand, supplies the operating part 104 with electric current and, on the other hand, also the pump control device 1 ', by feeding the electrical energy of the power supply cable 105 into the control line 106.
  • the electrical energy fed into the control line 106 has a sinusoidal characteristic (eg three-phase signals) and has the low mains current frequency of 50-60 Hz. Thus, no appreciable electromagnetic interference signals are produced, even if the control line 106 is very long.
  • control signals between the operating part 104 and pump control unit 1 ' are modulated onto a carrier frequency and superimposed on the electrical supply signals in the control line 106; in the pump control unit 1 ', the separation and demodulation of the control signals. about the control unit 104 can be transmitted, for example, desired values, which are taken into account by a control circuit in the pump control unit 1 'and due to the control electrical signals are generated, which are transmitted to drive the drive motor 103' via a cable 107.
  • a pressure sensor 14 ' is mounted directly on the pump control unit 1' (see FIG. 9).
  • the inner wall 3 ' has a passage opening 15' in the cavity 4 'for connection of the pressure sensor 14'. In the regulation, the pressure measured by the pressure sensor 14 'only has to be added to the additional delivery height resulting from the depth position of the liquid pump 100' in the wellbore 110.
  • the liquid pump 100 ' is designed as a submersible pump and, like the drive motor 103', has a housing shape that is essentially rotationally symmetrical about a longitudinal axis 108.
  • the pump controller 1 ' is coaxially connected to the submersible pump 100', resulting in a very slim and compact configuration.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP04450177A 2004-09-17 2004-09-17 Pompe et son unité de contrôle refroidie par le liquide pompé Withdrawn EP1637741A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04450177A EP1637741A1 (fr) 2004-09-17 2004-09-17 Pompe et son unité de contrôle refroidie par le liquide pompé
CA002511423A CA2511423A1 (fr) 2004-09-17 2005-07-05 Dispositif de commande de pompe refroidi par liquide et pompe
US11/181,203 US20060078444A1 (en) 2004-09-17 2005-07-13 Liquid-cooled pump control device and fluid pump assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04450177A EP1637741A1 (fr) 2004-09-17 2004-09-17 Pompe et son unité de contrôle refroidie par le liquide pompé

Publications (1)

Publication Number Publication Date
EP1637741A1 true EP1637741A1 (fr) 2006-03-22

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EP04450177A Withdrawn EP1637741A1 (fr) 2004-09-17 2004-09-17 Pompe et son unité de contrôle refroidie par le liquide pompé

Country Status (3)

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US (1) US20060078444A1 (fr)
EP (1) EP1637741A1 (fr)
CA (1) CA2511423A1 (fr)

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WO2010064055A1 (fr) * 2008-12-01 2010-06-10 Electronica Products Limited Refroidissement de circuits électroniques
WO2013130497A1 (fr) * 2012-02-27 2013-09-06 Magna Powertrain Of America, Inc. Pompe entraînée par un moteur électrique
ITPD20120409A1 (it) * 2012-12-27 2014-06-28 Dab Pumps Spa Apparecchiatura di controllo della portata di liquido di un'elettropompa e della temperatura dell'elettronica di controllo e comando di un dispositivo di pompaggio portante l'elettropompa

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HARRIS N C ET AL: "Design of an integrated motor/controller drive for an automotive water pump application", CONFERENCE RECORD OF THE 2002 IEEE INDUSTRY APPLICATIONS CONFERENCE. 37TH IAS ANNUAL MEETING . PITTSBURGH, PA, OCT. 13 - 18, 2002, CONFERENCE RECORD OF THE IEEE INDUSTRY APPLICATIONS CONFERENCE. IAS ANNUAL MEETING, NEW YORK, NY : IEEE, US, vol. 1 OF 4. CONF. 37, 13 October 2002 (2002-10-13), pages 2028 - 2035, XP010610156, ISBN: 0-7803-7420-7 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010064055A1 (fr) * 2008-12-01 2010-06-10 Electronica Products Limited Refroidissement de circuits électroniques
WO2013130497A1 (fr) * 2012-02-27 2013-09-06 Magna Powertrain Of America, Inc. Pompe entraînée par un moteur électrique
ITPD20120409A1 (it) * 2012-12-27 2014-06-28 Dab Pumps Spa Apparecchiatura di controllo della portata di liquido di un'elettropompa e della temperatura dell'elettronica di controllo e comando di un dispositivo di pompaggio portante l'elettropompa
EP2749770A1 (fr) * 2012-12-27 2014-07-02 Dab Pumps S.p.A. Appareil permettant de commander le débit de liquide d'une pompe électrique et la température de l'électronique de commande et d'actionnement d'un dispositif de pompage qui porte la pompe électrique

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CA2511423A1 (fr) 2006-03-17

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