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WO1990004109A1 - Can for canned motor pumps - Google Patents

Can for canned motor pumps Download PDF

Info

Publication number
WO1990004109A1
WO1990004109A1 PCT/EP1989/001192 EP8901192W WO9004109A1 WO 1990004109 A1 WO1990004109 A1 WO 1990004109A1 EP 8901192 W EP8901192 W EP 8901192W WO 9004109 A1 WO9004109 A1 WO 9004109A1
Authority
WO
WIPO (PCT)
Prior art keywords
canned
canned motor
compensate
motor pumps
bead
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.)
Ceased
Application number
PCT/EP1989/001192
Other languages
German (de)
French (fr)
Inventor
Ernst Graf
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Publication of WO1990004109A1 publication Critical patent/WO1990004109A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/0626—Details of the can
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs

Definitions

  • the canned tubes used in canned motor pumps are subject to elongation due to various causes:
  • the canned pipe was adjusted to the conditions in the respective electric motor after assembly.
  • the internal pressure prevailing during operation and the expected thermal expansion were taken into account by a stronger dimensioning of the canned wall and / or by supporting the canned pipe.
  • the invention has for its object to provide a can for canned motor pumps that can withstand the loads caused by construction tolerances, thermal expansion and increased internal pressure without increasing the wall thickness.
  • the object is achieved according to the invention by means of a canned tube which has one or more beads running all around to compensate for the expansion.
  • the invention is explained in more detail using an exemplary embodiment.
  • the drawing shows a section of a canned motor pump located in the area of the canned pipe.
  • the can (3) separating a rotor space (1) and a stator space (2) is welded at its ends to the canned motor.
  • the can (3) has a bead (5) which, adapted to the conditions of the canned motor here, extends into a free area of the part of the rotor space (1) which is remote from the pump.
  • the location of the bead (5) is also determined here by the direction of assembly of the canned rotor: Since the rotor (6) is inserted into the canned motor from the side of the centrifugal pump - not shown here - the bead (5) was inserted into one of the rotor (6) Placed area not touched during assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

To compensate longitudinal dilatation of the can (3) due to constructioal tolerances, to thermal expansion and to the internal pressure of the canned motor pump, said can is provided with one or several beads (5) which go round its periphery and compensate for the dilatation.

Description

Spaltrohr für Spaltrohrmotorpumpen Canned tube for canned motor pumps

Die in Spaltrohrmotorpumpen eingesetzten Spaltrohre werden aufgrund verschiedener Ursachen auf Längendehnung beansprucht:The canned tubes used in canned motor pumps are subject to elongation due to various causes:

a) Bautoleranzen b) Wärmedehnung c) Innendruck im Rotorrauma) Construction tolerances b) Thermal expansion c) Internal pressure in the rotor space

Um einer Beschädigung des Spaltrohres und damit einem Ausfall des Elektromotors vorzubeugen, berücksichtigte man die verschiedenen Beanspruchungen bisher durch verschiedene Maßnahmen:In order to prevent damage to the canned pipe and thus failure of the electric motor, various measures have so far been taken into account by various measures:

Um die Bautoleranzen auszugleichen, wurde das Spaltrohr nach der Montage an die im jeweiligen Elektromotor gegebenen Verhältnisse angeglichen. Den im Betrieb herrschenden Innendruck und die zu erwartende Wärmedehnung berücksichtigte man durch eine stärkere Dimensionierung der Spaltrohrwand und/oder durch AbStützungen des Spaltrohres.In order to compensate for the construction tolerances, the canned pipe was adjusted to the conditions in the respective electric motor after assembly. The internal pressure prevailing during operation and the expected thermal expansion were taken into account by a stronger dimensioning of the canned wall and / or by supporting the canned pipe.

Dies führte zu einem erhöhten Aufwand. Vor allem aber war die Verdickung der Spaltrohrwand mit Wirbelstromverlusten, also einer Verringerung des Wirkungsgrades des Spaltrohrmotors verbunden.This led to an increased effort. Above all, however, the thickening of the canned wall was associated with eddy current losses, that is to say a reduction in the efficiency of the canned motor.

Der Erfindung liegt die Aufgabe zugrunde, ein Spaltrohr für Spaltrohrmotorpumpen zu schaffen, das ohne eine Wandstärken¬ erhöhung den durch Bautoleranzen, Wärmedehnung und erhöhtem Innendruck entstehenden Belastungen standhält. Die Aufgabe wird erfindungsgemäß gelöst durch ein Spaltrohr, welches eine oder mehrere dem Dehnungsausgleich dienende rundum verlaufende Sicken besitzt.The invention has for its object to provide a can for canned motor pumps that can withstand the loads caused by construction tolerances, thermal expansion and increased internal pressure without increasing the wall thickness. The object is achieved according to the invention by means of a canned tube which has one or more beads running all around to compensate for the expansion.

Bereits eine Sicke verleiht dem erfindungsgemäßen Spaltrohr eine Dehnbarkeit, die ihm einen Ausgleich auch größerer Beanspruchungen durch die genannten Faktoren erlaubt. Die Sicke kann an einer beliebigen Stelle des Spaltrohres angebracht sein.Already a bead gives the can according to the invention an extensibility which allows it to compensate even larger loads due to the factors mentioned. The bead can be attached at any point on the can.

Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt einen im Bereich des Spaltrohres gelegenen Ausschnitt aus einer Spaltrohrmotor¬ pumpe.The invention is explained in more detail using an exemplary embodiment. The drawing shows a section of a canned motor pump located in the area of the canned pipe.

Das einen Rotorraum (1) und einen Statorraum (2) voneinander trennende Spaltrohr (3) ist an seinen Enden mit dem Spaltrohrmotor verschweißt. Zum Ausgleich der durch verschiedene Ursachen entstehenden Längendehnung besitzt das Spaltrohr (3) eine Sicke (5), die sich, den Gegebenheiten des hier vorhandenen Spaltrohrmotors angepaßt, in einen freien Bereich des pumpenabgewandten Teiles des Rotorraumes (1) erstreckt.The can (3) separating a rotor space (1) and a stator space (2) is welded at its ends to the canned motor. To compensate for the longitudinal expansion caused by various causes, the can (3) has a bead (5) which, adapted to the conditions of the canned motor here, extends into a free area of the part of the rotor space (1) which is remote from the pump.

Der Anbringungsort der Sicke (5) ist hier auch bestimmt durch die Montagerichtung des Spaltrohrraotors: Da der Rotor (6) von der Seite der - hier nicht dargestellten - Kreiselpumpe her in den Spaltrohrmotor eingeschoben wird, wurde die Sicke (5) in einem vom Rotor (6) bei der Montage nicht berührten Bereich plaziert. The location of the bead (5) is also determined here by the direction of assembly of the canned rotor: Since the rotor (6) is inserted into the canned motor from the side of the centrifugal pump - not shown here - the bead (5) was inserted into one of the rotor (6) Placed area not touched during assembly.

Claims

2 2nd PatentanspruchClaim Spaltrohr für Spaltrohrmotorpumpen, gekennzeichnet durch eine oder mehrere dem Dehnungsausgleich dienende rundum verlaufende Sicken (5). Canned tube for canned motor pumps, characterized by one or more beads (5) which serve to compensate for expansion.
PCT/EP1989/001192 1988-10-13 1989-10-10 Can for canned motor pumps Ceased WO1990004109A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883834863 DE3834863A1 (en) 1988-10-13 1988-10-13 CANOPY FOR CANOPY PUMPS
DEP3834863.2 1988-10-13

Publications (1)

Publication Number Publication Date
WO1990004109A1 true WO1990004109A1 (en) 1990-04-19

Family

ID=6365024

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1989/001192 Ceased WO1990004109A1 (en) 1988-10-13 1989-10-10 Can for canned motor pumps

Country Status (2)

Country Link
DE (1) DE3834863A1 (en)
WO (1) WO1990004109A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289801A (en) * 1994-05-25 1995-11-29 Jeumont Ind Sleeved rotating machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4227249C2 (en) * 1992-08-18 1997-02-06 Klaus Union Armaturen Pot pump
DE102014006568A1 (en) 2013-05-08 2014-11-13 Ksb Aktiengesellschaft Pump arrangement and method for producing a split pot of the pump assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955857A (en) * 1950-01-20
DE2048467A1 (en) * 1970-10-02 1971-11-11 Hanning Elektro Werke Heating circulation pump
US4516915A (en) * 1982-03-24 1985-05-14 Grundfos A/S Pumping plant
US4652218A (en) * 1981-01-16 1987-03-24 Nikkiso Co., Ltd. Canned motor pump for use at high temperatures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955857A (en) * 1950-01-20
DE2048467A1 (en) * 1970-10-02 1971-11-11 Hanning Elektro Werke Heating circulation pump
US4652218A (en) * 1981-01-16 1987-03-24 Nikkiso Co., Ltd. Canned motor pump for use at high temperatures
US4516915A (en) * 1982-03-24 1985-05-14 Grundfos A/S Pumping plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289801A (en) * 1994-05-25 1995-11-29 Jeumont Ind Sleeved rotating machine
GB2289801B (en) * 1994-05-25 1998-05-13 Jeumont Ind Sleeved rotating machine with stator

Also Published As

Publication number Publication date
DE3834863A1 (en) 1990-04-19

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