EP1260714B1 - Unité moteur/pompe avec moteur d'entraînement et pompe immersible - Google Patents

Unité moteur/pompe avec moteur d'entraînement et pompe immersible Download PDF

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Publication number
EP1260714B1
EP1260714B1 EP01112676A EP01112676A EP1260714B1 EP 1260714 B1 EP1260714 B1 EP 1260714B1 EP 01112676 A EP01112676 A EP 01112676A EP 01112676 A EP01112676 A EP 01112676A EP 1260714 B1 EP1260714 B1 EP 1260714B1
Authority
EP
European Patent Office
Prior art keywords
motor
assembly according
pump assembly
inner housing
drive motor
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.)
Expired - Lifetime
Application number
EP01112676A
Other languages
German (de)
English (en)
Other versions
EP1260714A1 (fr
Inventor
Lars Vestergaard Nielsen
Tom Jaeger
John Olsen
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.)
Grundfos AS
Original Assignee
Grundfos AS
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 Grundfos AS filed Critical Grundfos AS
Priority to EP01112676A priority Critical patent/EP1260714B1/fr
Priority to DE50111547T priority patent/DE50111547D1/de
Publication of EP1260714A1 publication Critical patent/EP1260714A1/fr
Application granted granted Critical
Publication of EP1260714B1 publication Critical patent/EP1260714B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • F04D29/5806—Cooling the drive system
    • 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 motor pump unit with an electric drive motor and a submersible associated centrifugal pump.
  • centrifugal pumps for pumping waste water in a well or basin such that the centrifugal pump is at least partially immersed in the wastewater, in which case the wastewater has reached its lowest level in the well.
  • the unit When the wastewater level has reached its highest level, the unit is usually completely submerged in the wastewater.
  • the electric drive motor of such pumps is equipped with a terminal box containing, in a known manner, the electrical control parts for automatically switching on and off and speed control of the drive motor, it must be ensured that the terminal box is watertight so as not to admit the electrical control parts damage and put it out of action.
  • the sealing material which is inserted between the lid and the rest of the box body of the terminal box, but has a limited life, so that the tightness of the terminal box is limited accordingly, including the aggressiveness of the pumped waste water contributes significantly.
  • the terminal box of such drive motors must therefore be checked for leaks in relatively short time intervals, with the sealing material being replaced if necessary.
  • the maintenance costs for a corresponding centrifugal pump unit are thus relatively high.
  • the terminal box of the centrifugal pump as a separate unit and to arrange this unit at a location in the well or basin that is not reached by the rising level of waste water in the well or basin.
  • the unit is then connected via an electrical cable to the functionally installed centrifugal pump.
  • the manufacture of such a separate unit is relatively expensive and there is not always a suitable place in the fountain for mounting the unit.
  • the insulating material of the electrical connection cable running from the unit to the centrifugal pump must be of special quality in order to be able to withstand the aggressiveness of the waste water.
  • the document DE-A-27 43 112 describes a motor pump unit with an electric drive motor and an associated submersible centrifugal pump comprising a rotatably mounted drive shaft with a rotor rotatably mounted thereon, a rotor surrounding the stator and a partially metallic motor housing with a centrifugal pump towards front end wall, wherein the motor housing, an inner housing, which carries the stator, consists of thermally conductive material and a housing surrounding the inner housing with a radial distance jacket for forming an annular space between the inner housing and this jacket. Said annular space is flowed through by the pumped fluid medium and the electrical means for operating the drive motor are arranged in a separate sealed space at the upper end of the unit.
  • the object of the invention is to improve an electric drive motor intended for a submerged in a pumped centrifugal electric drive motor of the kind mentioned in the introduction that the electrical control means for operating the drive motor, in particular for its automatic switching on and off and optionally to its speed control, are required, integrated in the engine and thus against damaging effects of the pumped medium
  • Centrifugal pump are permanently protected and that the drive motor is safely cooled even when dry installation of the unit.
  • the inventive solution eliminates the outside of the motor housing usually mounted terminal box with the known control means contained therein or a separate unit with the tax means in question including a connecting cable which connects the separate unit with the electric drive motor. All control means are now - separated from the mounting space of the power supply - contained in the annular space of the drive motor, which is sealed from the external engine environment that a damaging influence of the pumped medium, in which the engine is optionally immersed, is not given to the sealing material of the engine , Because the annular space has a relatively large volume, the electrical control parts can be arranged at the most advantageous places within the annular space, in addition to the possibility that a large number of control parts can be accommodated in the annular space, wherein the control parts themselves are not necessarily one Must have miniature construction.
  • the heat loss of the motor is safely dissipated to the pumped medium flowing through the pump.
  • the heat loss is passed from the inner housing of the drive motor to the front end wall of the drive motor, which in turn is acted upon by the pumped fluid of the pump.
  • the inner housing also serves as a heat sink for the heat loss that emanates from the electrical control parts in the mentioned annulus, for example, from the power section of a frequency converter.
  • the smooth surface of the unit reduces the risk of dirt accumulation.
  • a generally designated 1 motor pump unit which consists of an electric drive motor 2 and a submersible centrifugal pump 3.
  • the drive motor and the centrifugal pump are firmly connected to each other, for example, by a conventional clamping ring 4.
  • the drive motor has a drive shaft 5 rotatably mounted in its end regions, a rotor 6 arranged thereon in a rotationally fixed manner and an electric stator 7 which is radially opposite the rotor.
  • the stator 7 is rotatably mounted in a housing of the drive motor, said housing includes a front end wall 8, with which the centrifugal pump 3 is connected by means of the fastening ring 4.
  • the front end wall 8 is made of thermally conductive material and is acted upon on its the pump 3 facing surface 8a with a proportion of the flow of the centrifugal pump.
  • the housing of the electric drive motor 2 comprises in addition to the front end wall 8, a cylindrical inner housing 9 made of thermally conductive material, for example aluminum or an aluminum alloy, a rear end wall 10, which may be integrally formed with the inner housing or a special part connected thereto, and a jacket 11th This jacket surrounds the inner housing 9 at a radial distance, so that between these two parts an annular space 12 is formed, in which electrical means for operating the drive motor are arranged, as will become clear.
  • the jacket 11 is preferably made of stainless material and preferably of stainless steel with a wall thickness of 1 to 4 mm.
  • the jacket 11 may also be in the form of a bell or the like, it is formed in the shape shown in Fig. 1 as a parabolic stump. Alternatively, it may also be frusto-conical or tubular. On its outer surface, the jacket 11 is generally free of cooling fins. If desired, however, it may be provided on its outer side with cooling fins (not shown).
  • the motor housing of the electric drive motor 2 also includes a cover plate 13 which is fixed to the rear end of the inner housing 9. This attachment can be done by a central fastening screw 14 which is bolted to the inner housing.
  • the rear end of the inner housing has a bearing support member 15 which on the one hand has a bearing 16 for the rear rotatable mounting of the drive shaft 5 and on the other hand provided with a central threaded hole 17 for receiving the central fastening screw 14.
  • the end cover 13 has an introduction formation 18 for the introduction of a power supply cable (not shown) for the electrical power supply of the electrical, provided in the annular space 12 means for operating and controlling the drive motor.
  • a power supply cable (not shown) for the electrical power supply of the electrical
  • an introducer sheath 19 may be provided, with the aid of which the power supply cable is sealed from the environment.
  • the front end wall 8 has a peripheral flange 8b, on whose outer surface the one, the centrifugal pump 3 facing end portion of the shell 11 is sealed against the environment.
  • the seal can be made for example by elastic O-rings 20 which are angeordent in corresponding grooves of the peripheral flange 8b.
  • the substantially cylindrical inner housing 9 has a heat-conducting cross-section, which preferably increases toward the pump side of the electric drive motor 2. This can be achieved, for example, by providing the inner housing with cooling fins 22 extending radially outward, as best seen in FIG. 2. Additionally or alternatively, however, it is also possible that the cylindrical body of the inner housing, of which the electric stator 7 is held, is provided with a cross section which increases steadily toward the centrifugal pump 3.
  • the annular space 12 between the inner housing 9 and the casing 11 has a considerable size, both in the radial and in the axial direction.
  • This annular space is therefore excellently suited to receive the means for electrical operation of the drive motor 2.
  • Such Means are summarily indicated by the reference numeral 23 in Figs. 1 and 2.
  • Such resources are well known and include, for example, all of the terminals to provide electrical power to the electrical stator 7 as required.
  • the means 23 further comprise means for automatically switching on and off the drive motor and means for its speed control, which include, for example, a frequency converter. This list is not complete, so that all means that are important for the operation of the drive motor in question.
  • heat loss occurs both in the electric stator 7 and in some of the electrical equipment 23 in the annular space 12.
  • This heat loss is essentially dissipated via the material of the inner housing 9, namely towards the centrifugal pump 3.
  • the heat loss first reaches the front end wall 8 of the motor housing and is then removed from a portion of the flow of the centrifugal pump, which flows along the surface 8a of the end wall 8. As a result, an effective cooling of the electric drive motor 2 is given.

Landscapes

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

Claims (13)

  1. Unité moteur/pompe avec un moteur d'entraînement élecrique (2) et une pompe centrifuge immersible reliée à celui-ci, le moteur d'entraînement (2) comprenant un arbre d'entraînement (5) monté à rotation avec un rotor (6) disposé sur lui en étant fixe en rotation, un stator (7) entourant le rotor (6) et un carter moteur dissipateur de chaleur, avec une paroi d'extrémité avant (8) susceptible d'être reliée à la pompe centrifuge, le carter moteur présentant un boîtier intérieur (9) qui porte le stator (7) et qui est constitué d'un matériau conducteur de chaleur, en contact avec conduction de chaleur avec la paroi d'extrémité avant (8) susceptible d'être sollicitée, sur son côté pompe (8a), par le fluide à transporter de la pompe centrifuge, une enveloppe (11) entourant le boîtier intérieur (9) avec un espacement radial destiné à former entre le boîtier intérieur et cette enveloppe, un espace annulaire (12) isolé de façon étanche vis-à-vis de l'environnement extérieur du moteur, des moyens électriques (23) étant disposés dans l'espace annulaire (12) pour le fonctionnement du moteur d'entraînement (2), l'étanchéité de l'espace annulaire (12) faisant en sorte que le fluide à transporter n'exerce aucune influence nuisible.
  2. Unité moteur/pompe selon la revendication 1, caractérisée en ce que l'enveloppe (11) est réalisée en un métal inoxydable.
  3. Unité moteur/pompe selon la revendication 1 ou 2, caractérisée en ce que le carter moteur présente un couvercle de fermeture (13) fixé à l'extrémité arrière du boîtier intérieur (9).
  4. Unité moteur/pompe selon la revendication 3, caractérisée en ce que l'enveloppe (11) est conformée en tube, en tronc de cône, ou en tronc de paraboloïde.
  5. Unité moteur/pompe selon la revendication 3 ou 4, caractérisée en ce que l'enveloppe (11) est enserrée, à ses deux extrémités, entre la paroi d'extrémité avant (8) et le couvercle de fermeture (13).
  6. Unité moteur/pompe selon la revendication 5, caractérisée en ce que l'enveloppe (11), par ses deux extrémités, vient en prise avec conjugaison de forme avec la paroi d'extrémité (8) avant et le couvercle de fermeture (13) arrière et est montée en étant verrouillée à l'aide du couvercle de fermeture à l'extrémité arrière du boîtier intérieur (9).
  7. Unité motéur/pompe selon la revendication 6, caractérisée en ce que le couvercle de fermeture (13) est relié au boîtier intérieur au moyen d'une vis de fixation (14) centrale.
  8. Unité moteur/pompe selon la revendication 7, caractérisée en ce qu'à l'extrémité arrière du boîtier intérieur (9) est prévue une pièce support de palier (15) pour le montage à rotation de l'arbre d'entraînement (5) et en ce que la pièce support de palier (15) présente un trou taraudé (17) central pour recevoir la vis de fixation (14) centrale.
  9. Unité moteur/pompe selon l'une des revendications 1 à 8, caractérisée en ce que le boîtier intérieur (9) est muni de nervures de refroidissement (22) s'étendant radialement vers l'extérieur.
  10. Unité moteur/pompe selon l'une des revendications 1 à 9, caractérisée en ce que le boîtier intérieur (9) est réalisé en aluminium ou en un alliage d'aluminium.
  11. Unité moteur/pompe selon l'une des revendications 1 à 10, caractérisée en ce que la section transversale conductrice de chaleur du boîtier intérieur (9) va en s'élargissant vers le côté pompe du moteur d'entraînement (2).
  12. Unité moteur/pompe selon l'une des revendications 3 à 11, caractérisée en ce que le couvercle de fermeture (13) présente un agencement (18) pour l'introduction d'un câble d'alimentation électrique destiné à l'alimentation en énergie électrique des moyens électriques (23) servant au fonctionnement du moteur d'entraînement (2).
  13. Unité moteur/pompe selon l'une des revendications 1 à 12, caractérisée en ce que l'enveloppe (11) est munie de nervures de refroidissement sur sa face extérieure.
EP01112676A 2001-05-25 2001-05-25 Unité moteur/pompe avec moteur d'entraînement et pompe immersible Expired - Lifetime EP1260714B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01112676A EP1260714B1 (fr) 2001-05-25 2001-05-25 Unité moteur/pompe avec moteur d'entraînement et pompe immersible
DE50111547T DE50111547D1 (de) 2001-05-25 2001-05-25 Motorpumpemaggregat mit elektrischem Antriebsmotor und einntauchbaren Kreiselpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01112676A EP1260714B1 (fr) 2001-05-25 2001-05-25 Unité moteur/pompe avec moteur d'entraînement et pompe immersible

Publications (2)

Publication Number Publication Date
EP1260714A1 EP1260714A1 (fr) 2002-11-27
EP1260714B1 true EP1260714B1 (fr) 2006-11-29

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EP01112676A Expired - Lifetime EP1260714B1 (fr) 2001-05-25 2001-05-25 Unité moteur/pompe avec moteur d'entraînement et pompe immersible

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EP (1) EP1260714B1 (fr)
DE (1) DE50111547D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11808268B2 (en) 2020-10-19 2023-11-07 Milwaukee Electric Tool Corporation Stick pump assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006016981A1 (de) * 2006-04-06 2007-10-11 Alfred Kärcher Gmbh & Co. Kg Tauchpumpe
GB0703129D0 (en) * 2007-02-17 2007-03-28 Dlp Ltd An electrical shower-waste pump and control unit
GB202002218D0 (en) * 2020-02-18 2020-04-01 Bowman Power Group Ltd Electric Turbomachines
US11668323B2 (en) * 2021-06-28 2023-06-06 Garrett Transportation I Inc. Coolant system for integrated e-machine controller for turbomachine
US11781565B2 (en) * 2021-06-28 2023-10-10 Garrett Transportation I Inc. Integrated e-machine controller for turbomachine having fastener arrangement for electronics components
IT202100016853A1 (it) * 2021-06-28 2022-12-28 Dab Pumps Spa Pompa a immersione a manutenzione migliorata

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743112A1 (de) * 1977-09-24 1979-04-05 Albert Blum Elektrisch angetriebene pumpe
DE4121430C1 (fr) * 1991-06-28 1992-11-05 Grundfos International A/S, Bjerringbro, Dk
DE4222394C1 (de) * 1992-07-08 1993-12-09 Grundfos A S Bjerringbro Motorpumpe
DE4239071C2 (de) 1992-11-20 1997-01-30 Grundfos As Tauchpumpenaggregat
DE19703655C2 (de) * 1997-01-31 2000-01-05 Spn Schwaben Praezision Fritz Elektrischer Antrieb
FR2772207B1 (fr) * 1997-12-04 2004-11-26 France Etat Moteur electrique autosynchrone alternatif
DE19904148C1 (de) * 1999-02-03 2000-10-12 Pierburg Ag Elektrische Förderpumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11808268B2 (en) 2020-10-19 2023-11-07 Milwaukee Electric Tool Corporation Stick pump assembly
US12163524B2 (en) 2020-10-19 2024-12-10 Milwaukee Electric Tool Corporation Stick pump assembly

Also Published As

Publication number Publication date
EP1260714A1 (fr) 2002-11-27
DE50111547D1 (de) 2007-01-11

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