EP1347178B1 - Leicht zu reinigende Kreiselpumpe - Google Patents

Leicht zu reinigende Kreiselpumpe Download PDF

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Publication number
EP1347178B1
EP1347178B1 EP03005190A EP03005190A EP1347178B1 EP 1347178 B1 EP1347178 B1 EP 1347178B1 EP 03005190 A EP03005190 A EP 03005190A EP 03005190 A EP03005190 A EP 03005190A EP 1347178 B1 EP1347178 B1 EP 1347178B1
Authority
EP
European Patent Office
Prior art keywords
rotor
pump
centrifugal pump
pump according
impeller
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
EP03005190A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1347178A1 (de
Inventor
Heinz Rust
Friedemann Seibert
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.)
Hilge GmbH and Co KG
Original Assignee
Philipp Hilge & Co KG 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 Philipp Hilge & Co KG GmbH filed Critical Philipp Hilge & Co KG GmbH
Publication of EP1347178A1 publication Critical patent/EP1347178A1/de
Application granted granted Critical
Publication of EP1347178B1 publication Critical patent/EP1347178B1/de
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/048—Bearings magnetic; electromagnetic
    • 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
    • F04D13/0633—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
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—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
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0646—Units comprising pumps and their driving means the pump being electrically driven the hollow pump or motor shaft being the conduit for the working 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the present invention relates to centrifugal pump with a pump housing, which has a pump chamber comprising at least one of a suction area and an ejection area Impeller, which is rotatably mounted within the pump space about a wheel axis, and with an impeller drive, wherein the impeller drive consists of two reluctance motors, their stators at or in which the rotor surrounding housing portion of the pump are arranged.
  • centrifugal pump which is very easy to clean and in which e.g. by briefly pumping a flushing medium a previously existing in the pump pumping medium can be completely removed to Contamination of later pumped media to avoid, with the rinsing process as possible quick and easy and without disassembly and without using excessive amounts of Dishwashing agent should take place.
  • centrifugal pumps each with a reluctance motor, wherein the rotor of the motor and the impeller of the pump are integrated and represent a single, specially designed component.
  • Centrifugal pumps have in common that they do not allow the hydraulic components to build the pump in a modular manner and without the specifications of the function of the rotor to construct.
  • the present invention has the object, a To provide centrifugal pump with the features mentioned, which is even easier and is easier to clean and which is therefore particularly suitable for sterile applications or in general for applications where simplified purging and cleaning of a pump is desired is.
  • the impeller drive of Pump consists of at least one reluctance motor whose electrically non-contact rotor in the Recorded by the pumping medium volume of the pump chamber is received, and its stator is arranged on or in a surrounding the rotor housing portion of the pump.
  • Such a reluctance motor has traditionally been used for centrifugal pumps Drives have the advantage that the rotor must have neither permanent magnets nor any contains electrical windings that require a power supply. Furthermore, the rotors contain no permanent magnets.
  • a rotor e.g. can be connected directly to an impeller and the can rotate together with the impeller in the pump room.
  • pump room one Centrifugal pump the entire existing between an inlet port and an outlet and understood space acted upon by the medium to be pumped.
  • This space is insofar conceptual to distinguish from the space of a pumping cell, the volume within a pumping room limited, which is fully or largely acted upon by a rotating impeller.
  • the drive rotor no mechanical or electrical connection to other drive elements needed, you do not need any seals for appropriate transitions.
  • the rotor can be connected directly to the driven impeller and both parts in common can be arranged in the pump room so that easy cleaning and rinsing these parts is easily possible.
  • the rotor is independent of the magnetic drive forces has a magnetic bearing.
  • Such storage ensures that the rotor is in Operation of the pump does not come into contact with the pump housing, so that without appropriate Friction even higher speeds are possible.
  • the invention would also be readily available one or more sliding bearings open on both sides can be realized, which are easy to flush through and to are clean, since such bearings need not have a sealing function.
  • the magnetic storage is only possible or at least considerably facilitated by the fact that the rotor of the reluctance motor contains no permanent magnets for the drive, but only soft magnetic material.
  • the rotor is coupled directly to the impeller, so that no Transmission elements are present, in which parts of the pumping medium could get caught.
  • the rotor is a ring, which with a corresponding Drive shaft is connected, with gaps between radial projections of the Ringes are either filled with non-magnetic material or wrapped around the ring as a whole is, so that the gaps are covered.
  • the rotors of reluctance motors typically have radial projections of the teeth type a gear on, at different times by magnetic induction of a each nearest pole piece are tightened, according to the desired speed the rotor takes place a fast switching between several poles of the stator.
  • the design is as a substantially smooth ring with filled interdental spaces or a continuous enclosure preferred.
  • these support cams are annular Webs, preferably on the outer cylindrical surface of the annular rotor and optionally also on one or both axial end faces of the rotor.
  • the material of these casserole cams or webs is chosen so that it has the lowest possible sliding friction with the inner surface of the pump chamber housing has.
  • the invention in which two reluctance motors are provided for the drive, wherein each one rotor axially in front of an impeller or a group of successively connected wheels, and a rotor behind the impeller or group of cascaded impellers is arranged.
  • the rotors are in the vicinity of the intake and the discharge area of the pump.
  • the Pump is designed as an axial pump, that is as a pump, in which both the intake or intake manifold of the pump as well as the discharge area or discharge nozzle (discharge nozzle) the pump coaxial with the common axis of the rotor or the rotors and the impeller or the wheels are arranged.
  • an embodiment of the invention is preferred in which a plurality of wheels in series Rotate impeller cells.
  • the stator of the drive according to the invention is expediently outside the pump chamber arranged, with a four-pole winding for driving the rotor is preferred.
  • a two- or multi-pole winding for the radial magnetic bearing of the rotor be provided.
  • Other windings may be provided for the axial magnetic bearing of the rotor become.
  • These windings are expedient in which the rotor or rotor ring directly surrounding wall portion of the pump housing arranged.
  • special Recesses may be provided in the wall of the pump housing.
  • the radial clearance of the rotor is at most 1 to 2 mm and the axial play maximum 0.5 to 1 mm.
  • the windings for magnetic bearing should be independent of the stator windings the reluctance motor be switchable, so that the magnetic bearing both at slow running can be guaranteed as well as at standstill of the rotor.
  • any seals that exist between individual components of the pump housing or e.g. also between a hub of the rotor and the corresponding drive shaft for the wheels provided should, if possible, be open to the pump room and well accessible, that is neither before the seals should still between the seals and surrounding wall areas gendwelchen narrow, narrow sealing gaps remain, in which the pumping medium penetrate could and would be bad to clean.
  • the seals to the pump room should be largely open and the gaskets on the inner walls of the pump should be designed so that the transition from sealing surface to adjacent housing surface always relatively abrupt and at an angle of more than 30 °, so that on this Way narrow and narrow sealing gaps are avoided.
  • the rotor is suitably as spoked wheel with a hub and an annular rim as well typically three to a maximum of six spokes formed, which hub and rim or rim ring connect to each other, wherein the actual rotor, made of soft magnetic material with tooth-like radial projections, on the ring or rim area of such Spoked wheel limited.
  • the spokes should have a cross section that allows the passage of the Pump medium hindered as little as possible, since the spokes in the intake and / or in the Exhaust area of the pumping medium are located.
  • the single FIGURE shows an axial longitudinal section through a preferred embodiment of the invention Centrifugal pump.
  • the total designated 10 centrifugal pump consists of a multi-part pump housing, which in detail from a suction cover 1, a pressure lid 2, a first motor housing 3, a second motor housing 3 'as well as pump cell housings 13 is formed.
  • a cooling fins 25 may be provided.
  • the individual housing sections are sealed by means of sealing rings 6 and 7, respectively connected with each other.
  • the pump housing described above thus defines a pumping space 20, which has an intake area 26 and an ejection region or pressure region 27, wherein the actual pumping effect is generated by three successive impeller cells, which are separated by partitions 36 and 35 and housing sections 13 are defined.
  • the intake manifold 16 and the discharge port 17 are arranged coaxially with the common axis 18 of the wheels 4 and the rotors 5.
  • the first Impeller cell has a drive shaft 19 annularly surrounding the inlet opening 29, the pushes Pumping medium radially outward, from where it passes over baffles 21 in the next impeller cell is, which also has a central, annular inlet opening.
  • the pumping medium passes according to the illustrated Arrows in the discharge or pressure area 27 and from there through the discharge port 17 after outside or in a pressure line.
  • the pump medium flows through both in the process Intake region 26 as well as in the pressure region 27, the spoked wheels of the two rotors 5 and 5 '.
  • the spokes 14 of the spoke wheels have a circular shape However, they could just as well have an oblong or oval or flat cross-section have and be employed against the axis 18 propeller-like.
  • the rotors 5 are only very shown schematically.
  • the flat, recessed bars 23, 24 represent soft magnetic Elements or recesses between them.
  • the radially outer circumferential surface of a rotor 5 is formed by a slightly protruding, circumferential Web 9 formed, which could be divided into two or more narrower webs and which serves as an emergency bearing, in the event that there is a contact of the rotor 5 with the inner wall of the surrounding housing 3 comes.
  • a similar web 9 is also on the axial outside of the rotors 5 and 5 'are provided, which also opposite respective inner surfaces of the pump housing, However, under normal operating conditions in a small, but essentially constant distance of the order of 0.5 mm to these surfaces are kept.
  • the medium is passed through the impeller blades 4 guided radially outward into the pressure region 39 of the impeller cell in question and is from there About baffles 21 again the next, annular intake of a next impeller cell fed, etc., until the pumping medium finally from the last impeller cell in the pressure chamber 27 is ejected.
  • each rotor 5, 5 ' has only three or four corresponding spokes.
  • the wheels 4 and the rotors 5, 5 ' are fixedly connected to each other via the shaft 19, wherein individual Shaft sections in each case via seals 8 with the hubs 15 of the rotors 5, 5 'and the hubs the wheels 4 are connected.
  • These seals 8 are, as it is with the seals 6 and 7 recognizes sealing rings, which with a considerable part of their peripheral surface to the inner Pump room are exposed and thus well washed by the pumping medium.
  • the pump is constructed so that it consists of as many similar parts.
  • the suction cover 1 and the pressure cover 2 are identical components, which are only mirror images are arranged to each other.
  • the pump housing sections 3, 3 ' the same time the stator form the reluctance motors are identically constructed and only mirror images of each other arranged. The same applies to the rotors 5 including the associated spokes 14 and Hubs 22.
  • the individual pump cell housing or pressure cover 13 of the various Pump cells formed identical, that is, they each have a cylindrical housing portion 13 and a radially inwardly extending partition 35, which the suction cover the next impeller cell forms.
  • On the pressure side of each of the impeller cells are corresponding Guiding plates 21 provided on the partition wall 35.
  • a third cell consists of only one impeller 4.
  • the housing sections 3, 3 ' which form the stators to the reluctance, also have still cooling fins 25 on.
  • the axial arrangement of the suction nozzle 16 and the pressure port 17 causes the wheels experience no effective load in a radial direction, so that it is easier, the rotors 5, 5 'in the radial direction to store magnetically.
  • the axial magnetic bearing is independent of the radial bearing.
  • the shaft no longer needs any connection to an outside of the pump Drive and there are no sliding seals or other types of seals provided to which could be part of the pumping medium. Regardless, instead of one could magnetic bearing and one or two stationary Gleitdichtlager for the shaft 19 is provided become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cyclones (AREA)
EP03005190A 2002-03-21 2003-03-08 Leicht zu reinigende Kreiselpumpe Expired - Lifetime EP1347178B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10212693 2002-03-21
DE10212693A DE10212693A1 (de) 2002-03-21 2002-03-21 Leicht zu reinigende Kreiselpumpe

Publications (2)

Publication Number Publication Date
EP1347178A1 EP1347178A1 (de) 2003-09-24
EP1347178B1 true EP1347178B1 (de) 2005-05-11

Family

ID=27771483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03005190A Expired - Lifetime EP1347178B1 (de) 2002-03-21 2003-03-08 Leicht zu reinigende Kreiselpumpe

Country Status (4)

Country Link
EP (1) EP1347178B1 (da)
AT (1) ATE295479T1 (da)
DE (2) DE10212693A1 (da)
DK (1) DK1347178T3 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8696331B2 (en) 2008-05-06 2014-04-15 Fmc Technologies, Inc. Pump with magnetic bearings
WO2009137324A2 (en) * 2008-05-06 2009-11-12 Fmc Technologies, Inc. Motor with high pressure rated can
DE102008038787A1 (de) * 2008-08-13 2010-02-18 Siemens Aktiengesellschaft Fluidenergiemaschine
CN111043039B (zh) * 2019-12-30 2025-02-14 合肥华升泵阀股份有限公司 一种离心式多级泵

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715216A1 (de) * 1987-05-07 1988-11-17 Doll Robert Tauchpumpe, insbesondere fuer tiefsiedende fluessigkeiten
US5112200A (en) * 1990-05-29 1992-05-12 Nu-Tech Industries, Inc. Hydrodynamically suspended rotor axial flow blood pump
WO1996031934A1 (de) * 1995-04-03 1996-10-10 Sulzer Electronics Ag Rotationsmaschine mit elektromagnetischem drehantrieb
EP0846364B1 (de) * 1995-08-24 1999-12-15 Sulzer Electronics AG Elektromotor
US6015272A (en) * 1996-06-26 2000-01-18 University Of Pittsburgh Magnetically suspended miniature fluid pump and method of designing the same
US6053705A (en) * 1996-09-10 2000-04-25 Sulzer Electronics Ag Rotary pump and process to operate it
JP3777490B2 (ja) * 1997-01-31 2006-05-24 株式会社荏原製作所 送液装置及びその制御方法
DE19833033A1 (de) * 1997-07-26 1999-01-28 Allweiler Ag Lagerung für einen Rotor einer Strömungsmaschine sowie deren Verwendung
DE29907332U1 (de) * 1999-04-20 1999-09-02 Mediport Kardiotechnik Gmbh Vorrichtung zur schonenden Förderung von ein- oder mehrphasigen Fluiden
JP2001207988A (ja) * 2000-01-26 2001-08-03 Nipro Corp 磁気駆動型軸流ポンプ

Also Published As

Publication number Publication date
DE10212693A1 (de) 2003-10-02
EP1347178A1 (de) 2003-09-24
DE50300523D1 (de) 2005-06-16
DK1347178T3 (da) 2005-06-06
ATE295479T1 (de) 2005-05-15

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