EP3299627A1 - Pompe d'alimentation - Google Patents

Pompe d'alimentation Download PDF

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Publication number
EP3299627A1
EP3299627A1 EP17192607.4A EP17192607A EP3299627A1 EP 3299627 A1 EP3299627 A1 EP 3299627A1 EP 17192607 A EP17192607 A EP 17192607A EP 3299627 A1 EP3299627 A1 EP 3299627A1
Authority
EP
European Patent Office
Prior art keywords
pump
feed pump
rotor
outer rotor
shaft
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.)
Granted
Application number
EP17192607.4A
Other languages
German (de)
English (en)
Other versions
EP3299627B1 (fr
Inventor
Armin Herger
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.)
SPECK PUMPEN VERKAUFSGESELLCHAFT GmbH
Original Assignee
SPECK PUMPEN VERKAUFSGESELLCHAFT GmbH
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 SPECK PUMPEN VERKAUFSGESELLCHAFT GmbH filed Critical SPECK PUMPEN VERKAUFSGESELLCHAFT GmbH
Publication of EP3299627A1 publication Critical patent/EP3299627A1/fr
Application granted granted Critical
Publication of EP3299627B1 publication Critical patent/EP3299627B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • 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
    • 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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid pumps
    • 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
    • F04D29/586—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 present invention relates to a feed pump for fluid media, in particular a circulation pump for swimming pools or swimming pools or a feed pump for fluid chemicals in the system engineering, with a pump housing, arranged in the pump housing impeller which is rotatably mounted on a pump shaft, and a drive unit, which is connectable to a drive motor, wherein the drive unit and the pump shaft are in magnetic operative connection with each other via inner and outer magnets, which are separated from each other by a containment shell. Because of this magnetic drive concept such pumps are also referred to as magnetic coupling pumps.
  • Magnetic clutch pumps are among the most versatile types of pumps. They are robust and capable of delivering fluids of varying densities, from gases to liquids, at temperatures up to 400 ° C.
  • the pump part of a magnetic coupling pump usually corresponds to a conventional centrifugal pump and has a non-rotatably mounted on a pump shaft radial impeller. While in a conventional pump, the pump shaft is mechanically coupled to the drive motor, has a typical magnetic coupling pump driven by an electric or internal combustion engine cup-shaped drive member with an outer rotor, on the inner surfaces of which outer magnets are arranged radially.
  • an inner rotor connected to the pump shaft, on the outer surface of which inner magnets are arranged, is surrounded at its engine facing end by the outer rotor of the drive member so that the outer and inner magnets are opposed to the reverse polarity.
  • the inner rotor is hermetically separated from the outer rotor by means of a split pot, the inner magnets of the inner rotor being in magnetic operative connection with the outer magnets of the outer rotor over the split pot. Due to the hermetic separation of the inner rotor from the outer rotor through this split pot, which thus replaces the corresponding shaft seals of conventional motor-driven pumps, a leak-free delivery of the fluids is possible.
  • the storage of the pump shaft is usually done by several Sliding bearings that radially and axially support the inner rotor and the pump shaft and are typically lapped for lubrication and cooling of the fluid.
  • magnetic coupling pumps Due to the necessary use of permanent magnets magnetic coupling pumps are more expensive than corresponding pumps in which the pump shaft is mechanically connected to the drive motor. Therefore, magnetic coupling pumps have not yet been used in areas where there is a particularly high cost pressure, for example in the field of circulation pumps for swimming pools and swimming pools, where the clientele often consists of public and private end users. Meanwhile, however, permanent magnets are available at such low cost that magnetic coupling pumps can also be used in such areas.
  • the legal requirements for the energy efficiency of electric motors which are preferably used for magnetic drive pumps as driving motor, are increasing more and more, so that from January 2017 for motor powers from 0.75 kW compliance with a minimum efficiency IE3 in the EU is legally required (energy efficiency classification according to IEC 60034-30).
  • the engine manufacturers can only meet these requirements by installing high-quality components, so that, for example, more copper has to be used for the windings of electric motors.
  • the engines are not only more efficient, but then have a larger torque when starting the engine.
  • a magnetic drive pump in this case there is the risk of slippage, d. H.
  • the magnetic contact of the magnets of the rotor of the pump breaks off, so that the impeller can not be rotated despite the rotating motor.
  • the present invention is therefore based on the technical problem of providing a feed pump for fluid media, in particular a circulating pump for swimming pools and swimming pools, which allows the use of a magnetic drive coupling and is particularly inexpensive to produce when using energy efficient drive motors.
  • the invention therefore solves the technical problem by reversing the assignment of the inner and outer rotors, which are separated by a containment shell, compared with conventional magnetic coupling pumps.
  • conventional magnetic coupling pumps namely, the rotor connected to the motor shaft is designed as an outer rotor specifically with respect to a high tightening torque while the inner rotor is connected to the pump shaft
  • the outer rotor is connected to the pump shaft and the inner rotor is connected to the drive motor.
  • the present invention thus relates to a pump for fluid media of the type described above, which is characterized in that the drive unit, an inner rotor on which the inner magnets are arranged and which is rotatably connected to a motor shaft of the drive motor, and a rotationally fixed to the pump shaft connected outer rotor, wherein the outer rotor carries the outer magnet and engages around the inner rotor.
  • the inner rotor has additional weights, which serve to increase the moment of inertia of the inner rotor and thus act as a starting brake. Therefore, the additional weights slow down the start of the engine in the first few seconds after switching on, so that the risk of tearing of the magnetic coupling is reduced and the outer rotor synchronously with the Inner rotor can start. Surprisingly, it was found that despite the additional weights with the engine running no increased energy consumption is observed.
  • the additional weights can be adjusted in the function for increasing the moment of inertia of the respective engine power and the efficiency of the engine, so that for example the same feed pump can be used with motors in a power range of 0.75 to 2.2 kW.
  • the additional weights can be integrated into the inner rotor, for example, be sprayed as metal rings with an inner rotor made of die-cast metal or plastic.
  • the additional weights are designed as a flywheel, which is preferably replaceably mounted on the inner rotor.
  • the flywheel can be easily replaced by discs of different thicknesses or different materials, thus modifying the effect of the starting brake and adapting it to engine performance.
  • Such a flywheel also ensures, with its circularly symmetrical mass distribution, an equalization of the rotation of the inner rotor, so that a tearing off of the magnetic coupling during load fluctuations can be avoided.
  • the pump shaft and the outer rotor can be manufactured as an injection molded part.
  • the outer rotor and the Pump shaft are connected in many ways with each other.
  • the outer rotor can be sprayed against rotation on the pump shaft, so that the pump shaft and outer rotor in turn form a one-piece component.
  • the outer rotor has at its motor end a pot-like general shape, wherein the dimensions are selected so that the outer rotor engages around the inner rotor and the split pot disposed between the inner rotor and outer rotor.
  • the feed pump also preferably includes a fluid circuit via which for cooling and lubricating the bearings of the outer rotor, the can and the seal housing.
  • This fluid circuit is configured more complex than in a conventional magnetic coupling pump, in which fluid only needs to be guided close to the axis of the pump shaft to the plain bearings.
  • the feed pump preferably has a seal housing, in which the outer rotor is arranged and which together with the containment shell defines a part of the fluid housing provided for cooling and lubrication.
  • the pump shaft is preferably rotatably supported by at least one sliding bearing, particularly preferably two plain bearings, wherein the sliding bearing of the in the Fluid circulation guided fluid to be cooled and lubricated.
  • plain bearings preferably ceramic plain bearings are used.
  • the feed pump has an axial suction opening, through which the medium to be conveyed is sucked by the impeller and, for example, is conveyed radially into the pressure space on the outer circumference of the impeller.
  • the feed pump according to the invention can be used for different purposes, for example as a feed pump for fluid chemicals in systems engineering or as a circulation pump for swimming pools or swimming pools.
  • a fiber catcher is preferably arranged in front of the suction opening of the feed pump.
  • the fiber catcher can be connected to the suction opening via a hose or a line, but preferably the fiber catcher is integrated in the pump housing immediately before the suction opening of the pump.
  • the drive unit of the feed pump according to the invention may have a drive shaft which is centrally mounted in the inner rotor or sprayed with this, and which can be connected via a mechanical coupling with a motor shaft of a drive motor.
  • the inner rotor has a central bore, in which the motor shaft of a drive motor can engage in rotation, so that the drive motor can be flanged directly to the drive unit of the pump.
  • FIG. 2 shows an enlarged detail view of the FIG. 1
  • the illustrated feed pump 10 can be used for example as a circulation pump for swimming pools or swimming pools.
  • the feed pump 10 has a suction nozzle 11 which opens into an inlet opening 12 of an upstream fiber catcher 13.
  • the fiber catcher 13 comprises a filter basket 14 which can be removed via an opening 15 provided on the upper side of the fiber catcher 13.
  • the opening 15 of the fiber catcher 13 is closed by a screw 16.
  • An outlet opening 17 of the fiber trap opens into an axial suction opening 18 of the feed pump.
  • Adjoining the suction opening 18 is a radial impeller 19, which axially sucks the fluid to be delivered and transports it radially into a pressure chamber 20 of the delivery pump. From the pressure chamber 20, the fluid to be delivered is discharged via a pressure port 21.
  • the impeller 19 is stuck on a free end of a pump shaft 22 and there is rotationally fixed by means of tolerance ring and a screw 23.
  • an outer rotor 24 is sprayed.
  • the pump shaft 22 and the outer rotor 24 are isolated in the FIGS. 3 and 4 shown in more detail.
  • the impeller 19 opposite end of the outer rotor 24 is cup-shaped and has outer magnets 25 which are arranged on the inner circumference of the outer rotor 24.
  • the outer magnets 25 are permanent magnets, for example, on the outer rotor can be plugged in Nuttaschen or can be encapsulated by this. In the example shown, the outer magnets are fixed by means of a steel ring 26 in a recess of the outer rotor 24.
  • the recess is welded in the example shown by a frontal cover 50 gas-tight.
  • an inner rotor 27 In the pot formed by the outer rotor 24 is an inner rotor 27, on the outer circumference, the outer magnet 25 of the outer rotor 24 opposite, inner magnets 28 are arranged.
  • the inner rotor is insulated and detailed in the FIGS. 5 and 6 shown.
  • a split pot 29 is arranged, which consists of a non-magnetizable material.
  • the containment shell 29 is insulated and detailed in FIGS FIGS. 7 and 8 shown.
  • the inner rotor 27 has a drive shaft bore 30 into which a motor shaft 31 of a drive motor 32 flanged to the feed pump 10 can engage in a rotationally fixed manner.
  • the drive motor 32 may be, for example, an electric motor.
  • the inner rotor 27 on a flywheel 33 which is rotatably connected to the motor side end side of the inner rotor 27 and serves as additional weight to slightly delay the tarnishing of the inner rotor immediately after switching on the drive motor, so that the magnetic coupling between inner magnet 28 and outer magnet 25 does not break off in this phase.
  • the flywheel 33 is replaceably formed and fixed by means of two screws 34 on the motor-side end face of the inner rotor 27.
  • the feed pump 10 has a pump housing 35, which surrounds the impeller 19 and the pressure chamber 20. Adjoining the pump housing 35 is an intermediate housing 36, which surrounds the drive unit of the feed pump 10 which consists of the inner rotor and outer rotor. In the interior of the intermediate housing 36, a seal housing 37 is arranged, which together with the containment shell 29 forms a fluid channel 38 for a fluid for cooling and lubrication of the outer rotor and the bearings of the pump shaft.
  • the seal housing 37 is insulated in the FIGS. 9 and 10 shown in more detail.
  • the containment shell 29 has on its outer periphery a plate-like collar 39 which is connected by screws 40 to the seal housing and thus serves as a motor-side cover for the seal housing.
  • an O-ring 41 is arranged between the collar 39 acting as a cover for the seal housing of the can 29 and the seal housing 37.
  • the screws 40 can be protected by plugs 51 from the pumped medium.
  • plugs and o-rings made of a chemical resistant material, such as a fluoroelastomer or an ethylene-propylene-diene rubber, may be used.
  • a chemical resistant material such as a fluoroelastomer or an ethylene-propylene-diene rubber
  • FIG. 2 In particular, in the enlarged view of FIG. 2 is the central area of the feed pump 10 off FIG. 1 better recognizable. Additional arrows symbolized in FIG. 2 the fluid circuit for lubrication and cooling of the drive component. It can be seen that openings 43 are recessed between a pump-side cover 42 of the seal housing and the seal housing 37, via which conveying medium can pass from the pressure chamber 20 in a distributor space 44 formed by the seal housing. From the distributor space 44, the fluid passes through apertures 46 recessed in an inner wall 45 of the seal housing 37 into the fluid channel 38. There, the fluid flows around the cup-like region of the outer rotor 24 and the outer surface of the containment shell 29 between outer rotor 24 and containment shell 29 and passes over in the outer rotor provided openings 47 in the channel 38 back.
  • the pump shaft 22 is mounted at its ends in each case by a ceramic plain bearing 48a, 48b.
  • one component 48a is connected to the seal housing or the containment shell, while the other component 48b is connected to the pump shaft 22 or to the end of the outer rotor 24 sprayed onto the pump shaft.
  • the pump-side cover 42 has a central opening through which projects the impeller-side end of the pump shaft. About the annular gap formed between the pump shaft and the inner edge of the opening, the fluid enters a formed on the back of the impeller in the cover 42 radial gap 49 through which the fluid can be directed in the direction of pressure chamber 20 again.
  • FIGS. 3 and 4 the outer rotor 24 of the feed pump 10 according to the invention is shown in more detail. It can be seen that the cup-shaped housing of the outer rotor 24, in which the outer magnets 25 are fixed by means of steel ring 26, is gas-tight welded at the motor-side front end by means of a cover 50. At the impeller-side end of the outer rotor, the outer rotor 24 is sprayed onto the pump shaft 22. Furthermore, the components 48b of the two ceramic plain bearings connected to the outer rotor 24 are shown.
  • FIGS. 5 and 6 the inner rotor 27 of the feed pump according to the invention with screwed flywheel 33 is shown. It can be seen in particular in the perspective view of FIG. 6 the inner magnets 28 glued distributed on the outer circumference of the inner rotor, which are likewise designed like the outer magnets 25 of the outer rotor as permanent magnets.
  • the containment shell 29 is shown in more detail in cross section and in plan view.
  • the cross section corresponds to that in the FIG. 8 indicated section along the line VII-VII. It also recognizes the connected to the gap pot component 48a of the ceramic plain bearing, as well as acting as a motor-side cover of the seal housing collar 39 of the gap pot, which is formed as an integral component with the containment shell.
  • the seal housing 37 is shown in more detail in cross-section and in plan view.
  • FIG. 10 is the cut of the FIG. 9 indicated by the line IX-IX.
  • the seal housing 37 is a complex injection-molded part, which has an inner wall 45 for forming a distribution chamber 44 for serving as a coolant and lubricant partial flow of the pumped medium. It also recognizes the connected to the seal housing component 48a of the ceramic plain bearing.
  • the distribution chambers (44) are dimensioned large-scale for good cooling and lubrication of the ceramic bearings.
  • six chambers arranged in a star shape and separated by ribs enable a uniform, uniform flushing of the ceramic bearings over the openings 43, the chambers 44 and the openings 46 (cf. Fig. 2 ).

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  • 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)
EP17192607.4A 2016-09-23 2017-09-22 Pompe d'alimentation Active EP3299627B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202016105312.9U DE202016105312U1 (de) 2016-09-23 2016-09-23 Förderpumpe

Publications (2)

Publication Number Publication Date
EP3299627A1 true EP3299627A1 (fr) 2018-03-28
EP3299627B1 EP3299627B1 (fr) 2019-12-04

Family

ID=59955434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17192607.4A Active EP3299627B1 (fr) 2016-09-23 2017-09-22 Pompe d'alimentation

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EP (1) EP3299627B1 (fr)
DE (1) DE202016105312U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113982964A (zh) * 2021-11-18 2022-01-28 安徽莱恩电泵有限公司 一种核电用两级磁力泵
US11439882B2 (en) * 2020-03-31 2022-09-13 Speck Pompen Verkaufsgesellschaft GmbH Countercurrent swimming system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263312A (en) * 1992-01-17 1993-07-21 Stork Pompen Vertical pump with magnetic coupling.
DE202006005189U1 (de) * 2006-03-31 2007-08-16 H. Wernert & Co. Ohg Kreiselpumpe mit koaxialer Magnetkupplung
DE202015003085U1 (de) * 2015-04-29 2016-08-03 Speck Pumpen Verkaufsgesellschaft Gmbh Schmutzfänger für Förderpumpe mit beleuchtbarer Filtereinheit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912938C2 (de) * 1979-03-31 1985-03-14 Lederle Gmbh Pumpen Und Maschinenfabrik, 7800 Freiburg Flüssigkeitsring-Gaspumpe
CH672820A5 (fr) * 1986-03-21 1989-12-29 Ernst Hauenstein
US6863124B2 (en) * 2001-12-21 2005-03-08 Schlumberger Technology Corporation Sealed ESP motor system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263312A (en) * 1992-01-17 1993-07-21 Stork Pompen Vertical pump with magnetic coupling.
DE202006005189U1 (de) * 2006-03-31 2007-08-16 H. Wernert & Co. Ohg Kreiselpumpe mit koaxialer Magnetkupplung
DE202015003085U1 (de) * 2015-04-29 2016-08-03 Speck Pumpen Verkaufsgesellschaft Gmbh Schmutzfänger für Förderpumpe mit beleuchtbarer Filtereinheit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11439882B2 (en) * 2020-03-31 2022-09-13 Speck Pompen Verkaufsgesellschaft GmbH Countercurrent swimming system
CN113982964A (zh) * 2021-11-18 2022-01-28 安徽莱恩电泵有限公司 一种核电用两级磁力泵

Also Published As

Publication number Publication date
DE202016105312U1 (de) 2018-01-09
EP3299627B1 (fr) 2019-12-04

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