EP0171515B1 - Kreiselpumpe mit Spaltrohrtopf - Google Patents

Kreiselpumpe mit Spaltrohrtopf Download PDF

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Publication number
EP0171515B1
EP0171515B1 EP85105626A EP85105626A EP0171515B1 EP 0171515 B1 EP0171515 B1 EP 0171515B1 EP 85105626 A EP85105626 A EP 85105626A EP 85105626 A EP85105626 A EP 85105626A EP 0171515 B1 EP0171515 B1 EP 0171515B1
Authority
EP
European Patent Office
Prior art keywords
pump
pump impeller
impeller
centrifugal pump
suction connection
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
Application number
EP85105626A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0171515A1 (de
Inventor
Ernst Hauenstein
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.)
CP Pumpen AG
Original Assignee
CP Pumpen 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 CP Pumpen AG filed Critical CP Pumpen AG
Priority to AT85105626T priority Critical patent/ATE29275T1/de
Publication of EP0171515A1 publication Critical patent/EP0171515A1/de
Application granted granted Critical
Publication of EP0171515B1 publication Critical patent/EP0171515B1/de
Expired 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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/027—Details of the magnetic circuit
    • 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
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/025—Details of the can separating the pump and drive area
    • 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
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/026—Details of the bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0416—Axial thrust balancing balancing pistons
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/404—Transmission of power through magnetic drive coupling
    • F05B2260/4041—Transmission of power through magnetic drive coupling the driven magnets encircling the driver magnets

Definitions

  • the invention relates to a centrifugal pump according to the preamble of claim 1.
  • centrifugal pump is known from US-A-4 047 847.
  • the impeller shaft which is connected to the pump impeller in a rotationally fixed manner, is supported at one end on the canned pot, so that this canned pot can be exposed to undesirable mechanical loads.
  • equalization channels provided in the pump impeller, which extend from the rear of the pump impeller into the interior of the pump impeller, which leads to power losses. These equalization channels achieve partial pressure equalization between the pump chamber parts behind and in front of the pump impeller in order to keep the axial forces within limits. A remaining pressure difference is used to supply medium for cooling and lubrication to the bearing provided on the canned pot of the shaft of the pump impeller, for which purpose a lubrication channel is provided in the shaft.
  • the mechanical stress on the canned pot means that it must be built relatively thick-walled, which is disadvantageous for the magnetic force transmission; As is well known, the magnetic attraction decreases with the fifth power of the pole spacing.
  • the pump of DE-A-1 453 760 does have a stationary axis, but it is also attached to the can side in the area of the motor and behind the pump impeller in the area of cooling and lubrication, which is unfavorable in terms of cooling technology and lubrication technology, and is thus mechanically stressed in the can end of the canned can . That is why you had to take elaborate design measures with movable and fault-prone bearing parts so that the axis was relieved as much as possible during operation. Despite the pressure-reducing channels in the impeller that reduce performance, pressure equalization is problematic.
  • GB-A-888 514 provides a stationary axle that is overhung in the intake manifold.
  • An axial bearing provided in the intake manifold takes over the axial forces of the pump impeller operating without compensation due to the intake vacuum, while an axial bearing attached to the motor on the motor side prevents the pump impeller from running onto the canned pot. This is not practical for larger performances and prints and in any case promotes wear.
  • the invention has for its object to avoid the disadvantages of the known centrifugal pumps with canned pot and to propose a construction that is as simple, economical, durable and maintenance-friendly as possible.
  • the pump according to the invention has an adequately dimensionable compensation channel in its short, stationary axis and can do without performance-reducing compensation channels in the pump impeller. It also manages without the difficult to lubricate or complicated bearing on the motor side. The load on the canned pot is also excluded, so that it can be magnetically more expedient.
  • centrifugal pump there is such a manageable, practically instantaneous or low inertia pressure compensation that axial bearings are superfluous.
  • throttle rings which are attached to the impeller on the front and rear and are preferably located near the axis on the front. At least on the front, a counter ring on the housing is preferable, while on the back the bottom of the pot can serve as an emergency support. These rings can advantageously have emergency running properties and z.
  • B. consist of polytetrafluoroethylene, which is chemically resistant and self-lubricating.
  • the throttle rings will hardly ever come into contact in normal operation, since they are separated from each other or from the bottom of the pot by a damping medium layer and, in the event of extreme movements of the pump impeller in one direction, will intercept and compensate for an instantaneous balancing effect.
  • a canned pot 2 is inserted so tightly in the pump housing 1 that the canned pot 2 Separates pump chamber 3 from engine compartment 4 tightly and without moving seals.
  • the pump impeller 5 is housed connected to the associated external rotor 6 equipped with permanent magnets 60.
  • the electric drive motor 10 and the inner rotor 9 connected to it and equipped with permanent magnets 90 are accommodated in the engine compartment.
  • the pot wall 20 has an edge 22 which is sealingly held in the pump housing 1 and is the only sealing point of the canned pot 2 on the pump housing 1.
  • the pot base 21 of the canned pot 2 is connected in one piece to the pot wall 20, with the entire canned pot 2 preferably being made of electrically non-conductive ceramic material.
  • the pot base 21 is arched towards the motor 10, which allows the pump impeller 5 to be balanced with the external rotor 6 in a favorable manner.
  • the pump impeller 5 is rotatably mounted on the stationary axis 7, this bearing being limited to a purely radial bearing. Axial bearings are not necessary and not provided!
  • the axis 7 is fastened in the intake manifold 8 by means of supporting ribs 80, a ceramic sliding bearing 70 serving for the radial mounting of the pump impeller 5, and an external lubrication channel 75 being guided through a supporting rib 80 and through the axis 7 to the ceramic sliding bearing 70. If the pump medium is unfavorable for bearing lubrication, external lubrication can take place.
  • the axis 7 has a generously dimensioned compensating channel 71, which has a number of front lateral openings 72 and a rear opening 73, so that the suction port 8 on the front 52 of the pump impeller 5 of the pump housing 1 with that on the rear 53 of the pump impeller 5 located part of the pump chamber 3 is permeably connected by this channel 71 with low inertia for the pumped medium.
  • the pump impeller 5 of the illustrated type of a radial pump has a front suction opening 50 and radial channels 51, which are arranged to promote the pressure connection 11 of the pump housing 1.
  • the pump impeller 5 is otherwise free of openings.
  • the pump chamber located in front of the pump impeller is connected to the suction nozzle 8 and to the pressure nozzle 11 and the rear part of the pump chamber to the pressure nozzle 11 in a medium-conducting manner.
  • throttle rings 520 and 530 are provided on the pump impeller 5 on the front 52 and on the rear 53 of the pump impeller 5, which allow a balanced axial self-adjustment of the pump impeller 5 to be optimized for the intended purpose.
  • the rear throttle ring 530 is held by a retaining ring 531 and has no counterpart on the pot base 21, but this does not mean that a counter ring should be attached if necessary.
  • a counter ring 521 is fastened to the pump housing 1 close to the axis by means of retaining ring 522.
  • the operating conditions can also be taken into account with a throttle screw 74 which is designed as a grub screw in a rib 80 and is accessible from the outside and through which the free passage in the channel 71 can be changed.
  • the intended emergency running properties of the throttle rings 520/521 and 530 are used at most in exceptional cases if, due to extraordinary events, the pump impeller 5 travels a somewhat larger axial path than is planned in the axial mobility. Otherwise the pressure equalization through channel 71 acts so spontaneously that even violent pressure fluctuations can be absorbed.
  • the throttle rings have an optimized, regulating effect on the desired operating center position of the pump impeller 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
EP85105626A 1984-07-16 1985-05-08 Kreiselpumpe mit Spaltrohrtopf Expired EP0171515B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85105626T ATE29275T1 (de) 1984-07-16 1985-05-08 Kreiselpumpe mit spaltrohrtopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH345184 1984-07-16
CH3451/84 1984-07-16

Publications (2)

Publication Number Publication Date
EP0171515A1 EP0171515A1 (de) 1986-02-19
EP0171515B1 true EP0171515B1 (de) 1987-09-02

Family

ID=4256229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105626A Expired EP0171515B1 (de) 1984-07-16 1985-05-08 Kreiselpumpe mit Spaltrohrtopf

Country Status (5)

Country Link
US (1) US4645433A (enrdf_load_stackoverflow)
EP (1) EP0171515B1 (enrdf_load_stackoverflow)
JP (1) JPS6138192A (enrdf_load_stackoverflow)
AT (1) ATE29275T1 (enrdf_load_stackoverflow)
DE (1) DE3560533D1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006005189U1 (de) * 2006-03-31 2007-08-16 H. Wernert & Co. Ohg Kreiselpumpe mit koaxialer Magnetkupplung
CN107313974A (zh) * 2017-07-04 2017-11-03 安徽腾龙泵阀制造有限公司 一种提高磁力泵稳定性的隔离套

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672820A5 (enrdf_load_stackoverflow) * 1986-03-21 1989-12-29 Ernst Hauenstein
CH670286A5 (enrdf_load_stackoverflow) * 1986-06-04 1989-05-31 Sulzer Ag
DE3636404A1 (de) * 1986-10-25 1988-04-28 Richter Chemie Technik Gmbh Magnetkreiselpumpe
DE3818832A1 (de) * 1988-06-03 1989-12-07 Uranit Gmbh Spalttopf fuer stopfbuchsenlose elektrische oder magnetische antriebsaggregate
US5324177A (en) * 1989-05-08 1994-06-28 The Cleveland Clinic Foundation Sealless rotodynamic pump with radially offset rotor
US5039061A (en) * 1990-01-26 1991-08-13 John H. Carter Co., Inc. Magnetically actuated linear valve operator and method
GB2263312A (en) * 1992-01-17 1993-07-21 Stork Pompen Vertical pump with magnetic coupling.
DE9201412U1 (de) * 1992-02-05 1992-05-07 Qvf Glastechnik Gmbh, 6200 Wiesbaden Magnetkupplungspumpe, insbesondere zur Förderung aggressiver und umweltbelastender Medien
US5269664A (en) * 1992-09-16 1993-12-14 Ingersoll-Dresser Pump Company Magnetically coupled centrifugal pump
WO1994009274A1 (en) * 1992-10-19 1994-04-28 The Cleveland Clinic Foundation Sealless rotodynamic pump
DE4238132C2 (de) * 1992-11-12 2002-10-24 Teves Gmbh Alfred Kreiselpumpe, insbesondere Wasserpumpe für Kraftfahrzeuge
FR2715442B1 (fr) * 1994-01-26 1996-03-01 Lorraine Carbone Pompe centrifuge à entraînement magnétique.
FR2733010B1 (fr) * 1995-04-14 1997-07-04 Ceramiques Et Composites Sa Pompe centrifuge a entrainement magnetique
US5659205A (en) * 1996-01-11 1997-08-19 Ebara International Corporation Hydraulic turbine power generator incorporating axial thrust equalization means
US5779456A (en) * 1996-10-28 1998-07-14 Finish Thompson Inc. Magnetic drive
US6293772B1 (en) 1998-10-29 2001-09-25 Innovative Mag-Drive, Llc Containment member for a magnetic-drive centrifugal pump
EP1329638A1 (de) * 2002-01-18 2003-07-23 CP Pumpen AG Magnetgekuppelte Kreiselpumpe
WO2005028872A2 (en) * 2003-09-18 2005-03-31 Myrakelle, Llc Rotary blood pump
JP4679261B2 (ja) * 2005-06-24 2011-04-27 日本電産サンキョー株式会社 磁気結合ポンプ装置
CN103170020A (zh) * 2006-03-31 2013-06-26 索罗泰克公司 血泵和泵送血液的方法
US8858157B2 (en) * 2009-01-09 2014-10-14 Sulzer Pumpen Ag Centrifugal pump having an apparatus for the removal of particles
US8905729B2 (en) 2011-12-30 2014-12-09 Peopleflo Manufacturing, Inc. Rotodynamic pump with electro-magnet coupling inside the impeller
US8905728B2 (en) 2011-12-30 2014-12-09 Peopleflo Manufacturing, Inc. Rotodynamic pump with permanent magnet coupling inside the impeller
CN102966557A (zh) * 2012-11-07 2013-03-13 无锡惠山泵业有限公司 清水泵
US9771938B2 (en) * 2014-03-11 2017-09-26 Peopleflo Manufacturing, Inc. Rotary device having a radial magnetic coupling
US10738782B2 (en) 2016-11-01 2020-08-11 Psg Worldwide, Inc. Magnetically coupled sealless centrifugal pump

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970548A (en) * 1958-06-23 1961-02-07 Pumpindustri Ab Magnetically driven pump
GB888514A (en) * 1958-06-28 1962-01-31 Pumpindustri Ab Magnetically driven fluid pump
SU144401A1 (ru) * 1961-05-11 1961-11-30 В.В. Иванов Герметичный приводной центробежный насос
DE1453760A1 (de) * 1962-01-08 1969-01-09 Fuss Und Stahl Veredlung Gmbh Pumpe mit einem schnell rotierend angetriebenen Laufrad,insbesondere Kreiselpumpe
FR1432982A (fr) * 1965-04-21 1966-03-25 Klausmaschinen Und Appbau F Pompe à tube d'entrefer avec compensation de poussée axiale
US3373927A (en) * 1966-06-01 1968-03-19 Carrier Corp Fluid compressor
US3597117A (en) * 1969-01-10 1971-08-03 Rotorn Inc Fan for narrow environments
DE1943124A1 (de) * 1969-08-25 1971-03-04 Elektrotechnik Maschb A Loell Fluessigkeitspumpe,insbesondere Umwaelzpumpe fuer Warmwasser-Heizungsanlagen
US3825366A (en) * 1972-07-31 1974-07-23 Dresser Ind Assembly for centrifugal blowers and the like
DE2254265C3 (de) * 1972-11-06 1980-06-12 Franz 4630 Bochum Klaus Stopfbuchslose Chemiekreiselpumpe
GB1496035A (en) * 1974-07-18 1977-12-21 Iwaki Co Ltd Magnetically driven centrifugal pump
JPS51111902A (en) * 1975-03-26 1976-10-02 Iwaki:Kk Magnet pump
FR2311201A1 (fr) * 1975-05-12 1976-12-10 Siebec Filtres Perfectionnement apporte aux pompes a entrainement magnetique
US4304532A (en) * 1979-12-17 1981-12-08 Mccoy Lee A Pump having magnetic drive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006005189U1 (de) * 2006-03-31 2007-08-16 H. Wernert & Co. Ohg Kreiselpumpe mit koaxialer Magnetkupplung
CN107313974A (zh) * 2017-07-04 2017-11-03 安徽腾龙泵阀制造有限公司 一种提高磁力泵稳定性的隔离套

Also Published As

Publication number Publication date
EP0171515A1 (de) 1986-02-19
JPH0562240B2 (enrdf_load_stackoverflow) 1993-09-08
DE3560533D1 (en) 1987-10-08
ATE29275T1 (de) 1987-09-15
US4645433A (en) 1987-02-24
JPS6138192A (ja) 1986-02-24

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