EP0629780B1 - Submersible pump - Google Patents

Submersible pump Download PDF

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Publication number
EP0629780B1
EP0629780B1 EP94107444A EP94107444A EP0629780B1 EP 0629780 B1 EP0629780 B1 EP 0629780B1 EP 94107444 A EP94107444 A EP 94107444A EP 94107444 A EP94107444 A EP 94107444A EP 0629780 B1 EP0629780 B1 EP 0629780B1
Authority
EP
European Patent Office
Prior art keywords
motor
pump
cooling jacket
tube
casing
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
EP94107444A
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German (de)
French (fr)
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EP0629780A1 (en
Inventor
Manfred Zelder
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
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Filing date
Publication date
Application filed by Wilo GmbH filed Critical Wilo GmbH
Publication of EP0629780A1 publication Critical patent/EP0629780A1/en
Application granted granted Critical
Publication of EP0629780B1 publication Critical patent/EP0629780B1/en
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
    • F04D13/08—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
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine

Definitions

  • the invention relates to a submersible motor pump with an electric drive motor, under which the housing of a centrifugal pump is fastened, the housing of the motor being coaxially surrounded on the outside by a cooling jacket through which the conveying medium flows, the total outflow of the cooling jacket annulus being formed by a pipe which is formed in the cooling jacket annulus by a tube which lies axially parallel to the pump axis in the cooling jacket annulus and extends from the partition between the pump housing and motor to the area of the annulus furthest from the centrifugal pump.
  • a pipe forming the outflow of the cooling jacket annulus is therefore provided, which lies axially parallel to the pump axis in the cooling jacket annulus and extends into the area of the annulus furthest from the centrifugal pump in order to remove dirt particles from this area.
  • the pipe forming the drain inside the cooling jacket annulus means that the cooling liquid is always removed from the uppermost area of the cooling jacket or the annulus and thus air, gases and dirt particles are safely removed.
  • the annulus is always filled and optimally flowed through, so that a high and constant cooling capacity is achieved.
  • this known submersible pump has the disadvantage that the pipe forming the drain can become blocked by dirt particles entering its inlet, so that optimum cooling performance is not always ensured.
  • the object of the invention is therefore to provide a submersible motor pump in which the pipe forming the drain is largely protected against blockages and the cooling capacity is thus decisively improved.
  • this object is achieved in that the inlet of the drain pipe is angled by approximately 90 degrees and lies in the direction of flow of the cooling liquid behind the pipe part to which the flow first flows.
  • cooling jacket tapers conically in the upper region and the conical, oblique region clamps the upper end of the tube. It is therefore not necessary to provide additional fastening parts such as fastening clamps in the upper area for the pipe. Rather, it is safe to do that alone Pinched.
  • the submersible motor pump has an electric motor 1, the shaft 2 of which is vertical and is extended downward in order to reach into the pump housing 3 of a centrifugal pump 4.
  • the motor 1 has a stator 5 and a rotor 6 attached to the shaft 2.
  • the shaft 2 is held by an upper and a lower bearing 7, 8, which are fastened in an upper bearing bracket 9 and a lower bearing bracket 10.
  • the pump impeller 11 is mounted on the lower end of the shaft 2.
  • the electrical connection cable 12 of the motor 1 is guided in the interior of the motor via a cable socket 13 on the top of the motor. Furthermore, a holder 14 is fastened to the upper side of the motor in order to be able to lift the submersible motor pump in particular by means of a crane.
  • the housing 15 of the motor 1 is made of stainless steel and is made by flow lines.
  • the stator 5 of the motor is pressed together with the rotor 6 and the other motor parts into the interior of the housing 15.
  • the bearing supports 9, 10 are made of aluminum and can also be fastened by being pressed in.
  • the motor housing is coaxially surrounded by a cooling jacket 16 so that the cooling jacket with the outside of the Motor housing 15 forms an annular space 17.
  • This annular space 17 is flowed through by a cooling liquid, in particular water, which is branched off from the pumped medium.
  • the cooling jacket 16 is made of stainless steel and is attached to the motor by pressing.
  • the pump housing is made of plastic, in particular polyurethane.
  • the pump impeller 11 is made of plastic, in particular polyurethane.
  • a pipe 40 forming the drain which is connected at its lower end to a transverse bore 41 in the pump housing 3, which is located in the transverse wall 43 which separates the motor from the pump housing.
  • the transverse bore 41 leads to the pump interior in which the impeller 11 is mounted.
  • the upper end of the tube 40 is angled about 90 degrees.
  • the angled end with its inlet opening 42 faces away from the circulating flow direction of the cooling liquid.
  • the tube 40 is close to the outer wall of the motor housing 15; in particular, it is due to this. So that the pipe 40 is close to the outer wall of the motor housing, it is bent twice in the lower region 45 (bent).
  • the cooling jacket 16 tapers conically in the upper region, the conical oblique region 44 holding the upper end of the tube in a clamping manner.

Abstract

The invention relates to a submersible-motor pump comprising an electric drive motor, below which the casing of a centrifugal pump is attached, the casing (15) of the motor being externally surrounded coaxially by a cooling jacket (16) through which the flow medium flows. The outlet of the cooling jacket annulus (17) is formed by a pipe (40) which is inserted in the cooling jacket annulus (17) axially parallel to the pump axis and extends from the partition (43) between pump casing (3) and motor as far as the topmost region of the annulus (17). <IMAGE>

Description

Die Erfindung betrifft eine Tauchmotorpumpe mit einem elektrischen Antriebsmotor, unter dem das Gehäuse einer Kreiselpumpe befestigt ist, wobei das Gehäuse des Motors außen von einem Kühlmantel koaxial umgeben ist, der vom Fördermedium durchflossen ist, wobei der Gesamtabfluß des Kühlmantelringraums von einem Rohr gebildet ist, das im Kühlmantelringraum von einem Rohr gebildet ist, das im Kühlmantelringraum achsparallel zur Pumpenachse einliegt und sich von der Trennwand zwischen Pumpengehäuse und Motor bis in den der Kreiselpumpe entferntesten Bereich des Ringraums erstreckt.The invention relates to a submersible motor pump with an electric drive motor, under which the housing of a centrifugal pump is fastened, the housing of the motor being coaxially surrounded on the outside by a cooling jacket through which the conveying medium flows, the total outflow of the cooling jacket annulus being formed by a pipe which is formed in the cooling jacket annulus by a tube which lies axially parallel to the pump axis in the cooling jacket annulus and extends from the partition between the pump housing and motor to the area of the annulus furthest from the centrifugal pump.

Es hat sich gezeigt, daß der vom Kühlmantel begrenzte und vom Kühlmedium durchflossene Ringraum nicht immer vollständig vom Kühlmedium gefüllt ist, so daß eine verringerte Kühlleistung gegeben ist. Aufgrund der senkrechten Stellung des Motors des Tauchmotorpumpe sammelt sich im oberen Bereich des Ringraums leicht Luft an. Ferner kann es zu Ansammlungen von Schmutzpartikeln kommen, die aus dem Ringraum nicht mehr herausgelangen.It has been shown that the annular space delimited by the cooling jacket and through which the cooling medium flows is not always completely filled with the cooling medium, so that there is a reduced cooling capacity. Due to the vertical position of the submersible pump, air easily collects in the upper area of the annulus. Furthermore, dirt particles that cannot get out of the annular space can accumulate.

Bei einer Tauchmotorpumpe (Patents Abstracts of Japan, Band 10, Nr. 176 [M - 491], 20.06.1986) der eingangs genannten Art ist deshalb ein den Abfluß des Kühlmantelringraumes bildendes Rohr vorgesehen, das im Kühlmantelringraum achsparallel zur Pumpenachse einliegt und sich bis in den der Kreiselpumpe entferntesten Bereich des Ringraums erstreckt, um aus diesem Bereich Schmutzpartikel zu entfernen. Das den Abfluß bildende Rohr innerhalb des Kühlmantelringraums führt dazu, daß die Kühlflüssigkeit stets aus dem obersten Bereich des Kühlmantels bzw. des Kühlringraumes entnommen wird und damit Luft, Gase und Schmutzpartikel sicher abgeführt werden. Der Ringraum ist stets gefüllt und optimal durchflossen, so daß eine hohe und stetige Kühlleistung erreicht wird.For a submersible motor pump (Patents Abstracts of Japan, Volume 10, No. 176 [M - 491], June 20, 1986) the of the type mentioned, a pipe forming the outflow of the cooling jacket annulus is therefore provided, which lies axially parallel to the pump axis in the cooling jacket annulus and extends into the area of the annulus furthest from the centrifugal pump in order to remove dirt particles from this area. The pipe forming the drain inside the cooling jacket annulus means that the cooling liquid is always removed from the uppermost area of the cooling jacket or the annulus and thus air, gases and dirt particles are safely removed. The annulus is always filled and optimally flowed through, so that a high and constant cooling capacity is achieved.

Diese bekannte Tauchmotorpumpe weist jedoch den Nachteil auf, daß das den Abfluß bildende Rohr durch in seinen Einlaß gelangende Schmutzpartikel verstopfen kann, so daß eine optimale Kühlleistung nicht immer gegeben ist.However, this known submersible pump has the disadvantage that the pipe forming the drain can become blocked by dirt particles entering its inlet, so that optimum cooling performance is not always ensured.

Aufgabe der Erfindung ist es deshalb, eine Tauchmotorpumpe zu schaffen, bei der das den Abfluß bildende Rohr weitestgehend vor Verstopfungen geschützt ist und somit die Kühlleistung entscheidend verbessert ist.The object of the invention is therefore to provide a submersible motor pump in which the pipe forming the drain is largely protected against blockages and the cooling capacity is thus decisively improved.

Diese Aufgabe wird erfindungsgemäßdadurch gelöst, daß der Einlaß des Abflußrohrs um etwa 90 Grad abgewinkelt ist und in Strömungsrichtung der Kühlflüssigkeit hinter dem zuerst angeströmten Rohrteil liegt.According to the invention, this object is achieved in that the inlet of the drain pipe is angled by approximately 90 degrees and lies in the direction of flow of the cooling liquid behind the pipe part to which the flow first flows.

Bei dem erfindungsgemäßen Abflußrohres wird erreicht, daß Schmutzpartikel von der Strömung der Kühlflüssigkeit aus dem Einlaßbereich des Abflußrohres fortgetragen werden und somit ein Verstopfen des Rohreinlaßes sicher verhindert wird.With the drain pipe according to the invention it is achieved that dirt particles are carried away by the flow of the cooling liquid from the inlet area of the drain pipe and thus clogging of the pipe inlet is reliably prevented.

Ferner wird ein Stauen und Festsetzen von Schmutzteilchen dadurch verhindert, daß das Rohr nahe der Außenseite der Motorwand liegt. Die Zentrifugalwirkung des Kühlwassers schleudert schwere Teilchen nach außen am Rohr vorbei. Hierzu wird auch vorgeschlagen, daß das Rohr an der Außenseite der Motorwand anliegt,Damming and jamming of dirt particles is also prevented by the pipe lying close to the outside of the motor wall. The centrifugal effect of the cooling water throws heavy particles out past the pipe. For this purpose, it is also proposed that the pipe abuts the outside of the motor wall,

Von besonderem Vorteil ist es, wenn der Kühlmantel im oberen Bereich sich nach oben hin konisch verjüngt und der konische, schräge Bereich das obere Ende des Rohres klemmend hält. Damit ist es nicht erforderlich, zusätzliche Befes-tigungsteile wie beispielsweise Befestigungsschellen im oberen Bereich für das Rohr vorzusehen. Es ist vielmehr sicher, allein durch das Einklemmen gehalten.It is particularly advantageous if the cooling jacket tapers conically in the upper region and the conical, oblique region clamps the upper end of the tube. It is therefore not necessary to provide additional fastening parts such as fastening clamps in the upper area for the pipe. Rather, it is safe to do that alone Pinched.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

Figur 1:
Einen axialen Schnitt und
Figur 2:
zwei Seitenansichten des Abflußrohres.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
Figure 1:
An axial cut and
Figure 2:
two side views of the drain pipe.

Die Tauchmotorpumpe weist einen Elektromotor 1 auf, dessen Welle 2 senkrecht steht und nach unten verlängert ist, um in das Pumpengehäuse 3 einer Kreiselpumpe 4 hineinzureichen. Der Motor 1 weist einen Stator 5 und einen auf der Welle 2 befestigten Rotor 6 auf.The submersible motor pump has an electric motor 1, the shaft 2 of which is vertical and is extended downward in order to reach into the pump housing 3 of a centrifugal pump 4. The motor 1 has a stator 5 and a rotor 6 attached to the shaft 2.

Die Welle 2 ist durch ein oberes und ein unteres Lager 7,8 gehalten, die in einem oberen Lagerträger 9 und einem unteren Lagerträger 10 befestigt sind. Auf dem unteren Ende der Welle 2 ist das Pumpenlaufrad 11 gelagert.The shaft 2 is held by an upper and a lower bearing 7, 8, which are fastened in an upper bearing bracket 9 and a lower bearing bracket 10. The pump impeller 11 is mounted on the lower end of the shaft 2.

Das elektrische Anschlußkabel 12 des Motors 1 ist über eine Kabelbuchse 13 auf der Oberseite des Motors in dessen Inneres geführt. Ferner ist an der Motoroberseite ein Halter 14 befestigt, um die Tauchmotorpumpe insbesondere durch einen Kran anheben zu können.The electrical connection cable 12 of the motor 1 is guided in the interior of the motor via a cable socket 13 on the top of the motor. Furthermore, a holder 14 is fastened to the upper side of the motor in order to be able to lift the submersible motor pump in particular by means of a crane.

Das Gehäuse 15 des Motors 1 besteht aus Edelstahl und ist durch Fließstrecken hergestellt. Der Stator 5 des Motors wird zusammen mit dem Rotor 6 und den weiteren Motorteilen in das Innere des Gehäuses 15 eingedrückt.The housing 15 of the motor 1 is made of stainless steel and is made by flow lines. The stator 5 of the motor is pressed together with the rotor 6 and the other motor parts into the interior of the housing 15.

Die Lagerträger 9,10 sind aus Aluminium gefertigt und können auch durch Eindrücken befestigt sein. Daß Motorgehäuse ist außen von einem Kühlmantel 16 koaxial umgeben, so daß der Kühlmantel mit der Außenseite des Motorgehäuses 15 einen Ringraum 17 bildet. Dieser Ringraum 17 ist von einer Kühlflüssigkeit insbesondere Wasser durchflossen, das vom Fördermedium abgezweigt wird. Der Kühlmantel 16 besteht aus Edelstahl und ist durch Aufdrücken auf dem Motor befestigt.The bearing supports 9, 10 are made of aluminum and can also be fastened by being pressed in. The motor housing is coaxially surrounded by a cooling jacket 16 so that the cooling jacket with the outside of the Motor housing 15 forms an annular space 17. This annular space 17 is flowed through by a cooling liquid, in particular water, which is branched off from the pumped medium. The cooling jacket 16 is made of stainless steel and is attached to the motor by pressing.

Das Pumpengehäuse besteht aus Kunststoff insbesondere aus Polyurethan. In gleicher Weise besteht auch das Pumpenlaufrad 11 aus Kunststoff insbesondere Polyurethan.The pump housing is made of plastic, in particular polyurethane. In the same way, the pump impeller 11 is made of plastic, in particular polyurethane.

Im Kühlmantel 16 liegt senkrecht ein den Abfluß bildendes Rohr 40 ein, das mit seinem unteren Ende an einer Querbohrung 41 im Pumpengehäuse 3 angeschlossen ist, die sich in der Querwand 43 befindet, die den Motor von dem Pumpengehäuse trennt. Die Querbohrung 41 führt zum Pumpeninnenraum, in dem das Laufrad 11 gelagert ist.In the cooling jacket 16 is a pipe 40 forming the drain, which is connected at its lower end to a transverse bore 41 in the pump housing 3, which is located in the transverse wall 43 which separates the motor from the pump housing. The transverse bore 41 leads to the pump interior in which the impeller 11 is mounted.

Das obere Ende des Rohres 40 ist um etwa 90 Grad abgewinkelt. Hierbei ist das abgewinkelte Ende mit seiner Einlaßöffnung 42 der kreisenden Fließrichtung der Kühlflüssigkeit abgekehrt.The upper end of the tube 40 is angled about 90 degrees. Here, the angled end with its inlet opening 42 faces away from the circulating flow direction of the cooling liquid.

Das Rohr 40 liegt nahe der Außenwand des Motorgehäuses 15; insbesondere liegt es an dieser an. Damit das Rohr 40 nahe der Außenwand des Motorgehäuses liegt, ist es im unteren Bereich 45 zweifach gebogen (abgekröpft).The tube 40 is close to the outer wall of the motor housing 15; in particular, it is due to this. So that the pipe 40 is close to the outer wall of the motor housing, it is bent twice in the lower region 45 (bent).

Der Kühlmantel 16 verjüngt sich im oberen Bereich nach oben hin konisch, wobei der konische schräge Bereich 44 das obere Ende des Rohres klemmend hält.The cooling jacket 16 tapers conically in the upper region, the conical oblique region 44 holding the upper end of the tube in a clamping manner.

Claims (4)

  1. A submersible pump having an electric driving motor below which the casing (3) of a centrifugal pump is attached, the casing (15) of the motor being coaxially enclosed by a cooling jacket (16) through which conveying medium flows, the total discharge of the cooling jacket annular space (17) being formed by a tube (40) which is disposed in the cooling jacket annular space (17) axis-parallel with the pump axis and extends from the partition (43) between the pump casing (3) and the motor (1) as far as the zone of the annular space (17) furthest away from the centrifugal pump, characterized in that the inlet (42) of the discharge tube (40) is bent by substantially 90 degrees and is disposed in the direction of cooling liquid flow downstream of the portion of the tube first receiving the flow.
  2. A submersible pump according to claim 1, characterized in that the tube (40) is disposed adjacent the outside of the motor casing wall.
  3. A submersible pump according to claim 2, characterized in that the tube (40) bears against the outside of the motor casing wall.
  4. A submersible pump according to one of the preceding claims, characterized in that in the upper zone the cooling jacket (16) tapers conically upwards, and the conically inclined zone (44) clamps and retains the upper end of the tube (40).
EP94107444A 1993-06-14 1994-05-13 Submersible pump Expired - Lifetime EP0629780B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4319619 1993-06-14
DE4319619A DE4319619A1 (en) 1993-06-14 1993-06-14 Submersible pump

Publications (2)

Publication Number Publication Date
EP0629780A1 EP0629780A1 (en) 1994-12-21
EP0629780B1 true EP0629780B1 (en) 1997-03-12

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EP94107444A Expired - Lifetime EP0629780B1 (en) 1993-06-14 1994-05-13 Submersible pump

Country Status (5)

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US (1) US5480290A (en)
EP (1) EP0629780B1 (en)
AT (1) ATE150138T1 (en)
DE (2) DE4319619A1 (en)
ES (1) ES2098816T3 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624145A1 (en) * 1996-06-18 1998-01-08 Wilo Gmbh Electric motor
US5704717A (en) * 1996-09-17 1998-01-06 Franklin Electric Co., Inc. Bearing support for rotary machine
CA2283603A1 (en) * 1998-10-01 2000-04-01 Paul W. Behnke Forced closed-loop cooling for a submersible pump motor
PL208405B1 (en) 2002-05-07 2011-04-29 Emu Unterwasserpumpen Gmbh Driving motor, especially for a pump
ES2232237B1 (en) * 2002-08-01 2006-07-16 Bogemar, S.L. SUBMERSIBLE ELECTRIC PUMP.
IT1390742B1 (en) * 2008-08-04 2011-09-23 Pedrollo Spa FIXING DEVICE FOR CABLES FOR SUBMERSIBLE PUMPS
US9033685B1 (en) 2010-04-26 2015-05-19 Rex N. Await Well pump flow sleeve installation assembly and method
LU91731B1 (en) * 2010-09-13 2012-03-14 Zenit Internat S A Cooling systems for submersible pumps
EP2729667B1 (en) * 2011-07-08 2017-06-07 Pierburg Pump Technology GmbH Vacuum pump for use in the automotive sector
US20130189131A1 (en) * 2012-01-19 2013-07-25 Han-Lung Huang Water cooled motor with stainless steel cooling jacket
KR101601100B1 (en) * 2014-08-27 2016-03-08 현대자동차주식회사 Electric Water Pump with Coolant Passage
LU101956B1 (en) * 2020-07-27 2022-01-27 Wilo Se centrifugal pump
US20220042508A1 (en) * 2020-08-07 2022-02-10 Hayes Pump, Inc. Submersible fuel oil set
US11808268B2 (en) 2020-10-19 2023-11-07 Milwaukee Electric Tool Corporation Stick pump assembly
CN112524042B (en) * 2020-11-20 2022-05-20 江苏大学 Multistage mixed transportation pump for deep sea mining

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE516474C (en) * 1926-11-13 1931-01-23 Siemens Schuckertwerke Akt Ges Waterproof encapsulated electrical machine with pronounced pole poles
DE900233C (en) * 1939-08-20 1953-12-21 Aeg Protection device for ceramic outdoor insulators
DE974822C (en) * 1951-06-26 1961-05-04 Emu Unterwasserpumpen G M B H Mud pump
US3135213A (en) * 1962-10-30 1964-06-02 Watt V Smith Immersible motor-pump unit
SE367465B (en) * 1965-04-30 1974-05-27 Stenberg Flygt Ab
DE1900233A1 (en) * 1969-01-03 1970-07-30 Ewald Burger Submersible pump unit
SE327904B (en) * 1969-04-18 1970-08-31 Stenberg Flygt Ab
SE7402800L (en) * 1974-03-04 1975-09-05 Stenberg Flygt Ab
CH627236A5 (en) * 1978-02-14 1981-12-31 Martin Staehle
JPS5762691A (en) * 1980-10-02 1982-04-15 Nec Corp Signal conversion system from pb signal to dp signal
IT8420754A0 (en) * 1984-05-02 1984-05-02 Pompe Ing Calella S P A COMPACT AGGREGATE FOR FULLY SUBMERGED CENTRIFUGAL PUMP/ELECTRIC MOTOR FOR PUMPING AGGRESSIVE LIQUIDS AND/OR CONTAINING SOLID SUBSTANCES.
JPS6125988A (en) * 1984-07-13 1986-02-05 Hitachi Ltd Booster pump for water spigot
DE3609311A1 (en) * 1986-03-20 1987-10-01 Homa Pumpenfabrik Gmbh Centrifugal pump
DE4022610A1 (en) * 1990-07-16 1992-01-23 Abs Pumpen Ag DEVICE FOR THE AUTOMATIC VENTILATION OF A REFRIGERATION CHAMBER
DE4121430C1 (en) * 1991-06-28 1992-11-05 Grundfos International A/S, Bjerringbro, Dk
SE9102517L (en) * 1991-09-03 1992-09-07 Flygt Ab Itt DEVICE FOR ASTADCOMMATING BY COOLING A CHEATED CHEATED ELECTRICAL ENGINE

Also Published As

Publication number Publication date
ATE150138T1 (en) 1997-03-15
US5480290A (en) 1996-01-02
DE4319619A1 (en) 1994-12-15
EP0629780A1 (en) 1994-12-21
DE59402008D1 (en) 1997-04-17
ES2098816T3 (en) 1997-05-01

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