EP3714165A1 - Pompe magnétique à garniture mécanique d'étanchéité - Google Patents

Pompe magnétique à garniture mécanique d'étanchéité

Info

Publication number
EP3714165A1
EP3714165A1 EP18833614.3A EP18833614A EP3714165A1 EP 3714165 A1 EP3714165 A1 EP 3714165A1 EP 18833614 A EP18833614 A EP 18833614A EP 3714165 A1 EP3714165 A1 EP 3714165A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
pump
mechanical
drive
mechanical seal
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.)
Pending
Application number
EP18833614.3A
Other languages
German (de)
English (en)
Inventor
Manfred Sade
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3714165A1 publication Critical patent/EP3714165A1/fr
Pending 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • 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
    • 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
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
    • F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
    • 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
    • F04D29/046—Bearings
    • F04D29/049—Roller 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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals

Definitions

  • the invention relates to magnetic pumps.
  • Conventional pumps (not magnetic pumps) are usually sealed by mechanical seals (GLRDs).
  • mechanical seals are not completely leakproof, so that pumped liquids can enter the environment, even if only in small quantities.
  • the mechanical seals from the pumps were largely eliminated and replaced by a magnetic drive design.
  • pumps with a magnetic drive were increasingly used (so-called magnetic pumps).
  • the pumped medium is hermetically shielded from the environment so that no leaks can escape into the environment. Magnetic pumps are therefore used wherever the following media should not be released into the environment:
  • the pump impeller is connected via a shaft to the rotating, driven magnet carrier.
  • the shaft is guided in plain bearings, both radially and axially. In very rare cases, ceramic rolling bearings are used.
  • the drive magnet carrier is outside the media housing. The torque is transmitted through the housing wall of the split pot by the magnetic forces and drives so, with the driven magnetic carrier, the pump.
  • the drive magnet carrier is guided in external roller bearings (with pump version with coupling) or in block construction directly connected with the shaft of the drive motor.
  • the construction and design of the pump, its containment shell and the magnetic coupling therefore require much more care and expertise than conventional pump types.
  • the induction of eddy currents can be greatly reduced or avoided altogether by making the containment shell of a non-conductive material such as ceramic - such as zirconia - or plastic, but these materials are often expensive and are suitable for some fluids, operating pressures or operating conditions (especially pressure surges ) Not.
  • the small gap dimensions in conjunction with the high flow-mechanical effects in the containment shell prevent the promotion of particle-laden media, which could clog the narrow flow channels.
  • non-Newtonian (rheological) fluids are often not allowed.
  • the use of a barrier medium can remedy the situation, provided that it is tolerable that the barrier medicine by proportional contributed, ie mixed with the actual fluid.
  • the magnetic coupling pump is in many cases the only solution to promote particularly toxic, odorous or expensive media without requiring a special motor (canned motor), which are justified by the enormous design cost high cost of this type of pump and accepted.
  • the present invention seeks to substantially improve a magnetic pump of the type mentioned and to design such that all the disadvantages of conventional magnetic pumps are avoided.
  • the solution of the problem is achieved with the invention by the characterizing features of claim 1.
  • the pump medium is held by the product-side, first mechanical seal / GLRD 3 in the pump chamber 2 and thus separated from the bearing 11, 8 and the magnetic drive 10. Solids-containing or highly viscous media thus do not get into the shaft bearing and in the gaps 19 of the can with magnetic drive 10. There is no clogging by particle-laden media, since the medium can not get into the narrow flow channels of the magnetic drive and in the storage.
  • the barrier fluid space 4 Between the first 3 and second 6 GLRD is the barrier fluid space 4, which causes a further barrier to the pumping medium out.
  • the product compatible, clean barrier liquid leads in the circuit A, B by an integrated pumping device 4 via a barrier liquid container in which the barrier liquid can be cooled or heated individually.
  • the barrier fluid space can be pressurized so that optimal functional conditions can be set to the mechanical seals 3, 6. A pressureless operation of the mechanical seal is also possible.
  • the barrier fluid chamber can be monitored or checked for pressure, temperature and leaks.
  • the second mechanical seal 6 separates the barrier liquid space A, B to the storage or magnetic drive space D, E.
  • the inventive placement of a double mechanical seal 3, 6 at this point, the drive shaft, free of the pump medium, can be performed without play in conventional precision bearings.
  • the bearings 11, 8 can be operated as intended with a smooth running oil. This oil also flows by means of an integrated pumping device 13 in a circuit through the inner magnet output 10 and split pot 12 to an oil cooler and from there back to the pump storage room.
  • the delivery pressure of the new solenoid pump no longer depends on the design or the material of the containment shell (generally 10 bar max.) But on the design of the mechanical seal (in standard version 25 bar). When using special mechanical seals, media with much higher pressures can be conveyed.
  • the pump of the invention may also deliver non-Newtonian (rheological) fluids. There is no dry running of the pump, since the barrier fluid space between the two mechanical seals and oil-filled storage space can be filled self-venting. This means that the pump will not run dry even if there is little or no fluid in the pump.
  • the pump can also be operated in part-load operation (eg greatly reduced in bypass mode) without a time limit without running hot. This makes repairs in the system flexible and safe.
  • the invention can be used in the following machines, namely centrifugal pumps, gear pumps, rotary lobe pumps, screw pumps, agitators, canned motor pumps, ventilators / fans / fans, bead mills, in all machines where a rotating shaft must be sealed to the housing, z. B. also compressors and vacuum pumps.
  • GLRDs instead of a double mechanical seal, depending on the safety level and control requirement, multiple mechanical seals can be used. Three, four or more GLRDs are connected in series to reduce any pressure leaks. The number of GLRDs depend on the amount of the media pressure to be removed and the security requirement.
  • the shaft bearing 8, 11 can be placed very close, directly behind the mechanical seal 6, towards the impeller.
  • the very short distance between the impeller 2 and 8, 11 prevents excessive shaft deflection over the impeller 2 by the building up hydraulic back pressure on the pressure side of the pump. This prevents largely unwelcome radial movements between the mechanical seals and thus extends their service life.
  • the mechanical seals in conventional pumps always seal the pumped fluid (with single mechanical seal) or the pumped fluid and the barrier fluid to the atmosphere.
  • the cause is the latent or absolute dry running of the atmospheric mechanical seal (especially with double mechanical seal), eg.
  • in barrier liquid loss insufficient cooling of the mechanical seal, gasification of the barrier medium (which practically equates to a dry run).

Landscapes

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

Abstract

L'invention concerne une pompe magnétique comportant une chambre de pompe et une zone d'entraînement à chemise d'entrefer. L'invention vise à pallier les inconvénients de pompes magnétiques classiques. A cet effet, au moins une garniture mécanique d'étanchéité (GLRD, 3) est disposée entre la chambre de pompe (2) et l'entraînement magnétique/ensemble de support (10, 13).
EP18833614.3A 2017-11-23 2018-11-21 Pompe magnétique à garniture mécanique d'étanchéité Pending EP3714165A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017127736.6A DE102017127736A1 (de) 2017-11-23 2017-11-23 Magnetpumpe mit Gleitringdichtung
PCT/EP2018/000523 WO2019101354A1 (fr) 2017-11-23 2018-11-21 Pompe magnétique à garniture mécanique d'étanchéité

Publications (1)

Publication Number Publication Date
EP3714165A1 true EP3714165A1 (fr) 2020-09-30

Family

ID=65019456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18833614.3A Pending EP3714165A1 (fr) 2017-11-23 2018-11-21 Pompe magnétique à garniture mécanique d'étanchéité

Country Status (4)

Country Link
EP (1) EP3714165A1 (fr)
CN (1) CN112105822B (fr)
DE (1) DE102017127736A1 (fr)
WO (1) WO2019101354A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019133241A1 (de) * 2019-12-05 2021-06-10 Efficient Energy Gmbh Besondere massnahmen zur temperaturführung eines rotors eines elektromotors
CN111520334A (zh) * 2020-04-27 2020-08-11 安徽南方化工泵业有限公司 一种机械密封化工泵及其使用方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2435846A1 (de) * 1974-07-25 1976-02-12 Allweiler Ag Tauchpumpe
DE2550201A1 (de) * 1975-11-08 1977-05-18 Hermetic Pumpen Gmbh Hermetisch abgekapselter elektrischer pumpen-antrieb
JPS6098195A (ja) * 1983-11-04 1985-06-01 Kiichi Taga 二重バランス型無漏えいポンプ
DE3722110A1 (de) * 1987-07-03 1989-01-12 Burgmann Dichtungswerk Feodor Die anordnung einer gasgeschmierten gleitringdichtung und dichtungsanordnung fuer eine welle
EP0386315A1 (fr) * 1989-03-07 1990-09-12 Feodor Burgmann Dichtungswerke GmbH & Co. Dispositif d'étanchéité et pompe pour son application
DE19800302A1 (de) 1998-01-07 1999-07-08 Wilo Gmbh Kreiselmotorpumpe mit Gleitringdichtung
JP4785262B2 (ja) * 2001-04-06 2011-10-05 日機装株式会社 キャンドモータポンプ
DE202006005189U1 (de) * 2006-03-31 2007-08-16 H. Wernert & Co. Ohg Kreiselpumpe mit koaxialer Magnetkupplung
DE102011001041B9 (de) * 2010-11-15 2014-06-26 Hnp Mikrosysteme Gmbh Magnetisch angetriebene Pumpenanordnung mit einer Mikropumpe mit Zwangsspuelung und Arbeitsverfahren
DE202016100655U1 (de) * 2016-02-10 2017-05-11 Speck Pumpen Vakuumtechnik Gmbh Magnetkupplungspumpe

Also Published As

Publication number Publication date
CN112105822A (zh) 2020-12-18
CN112105822B (zh) 2022-10-04
WO2019101354A1 (fr) 2019-05-31
DE102017127736A1 (de) 2019-05-23

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