EP1706932A1 - Centrifugal pump unit - Google Patents
Centrifugal pump unitInfo
- Publication number
- EP1706932A1 EP1706932A1 EP05706855A EP05706855A EP1706932A1 EP 1706932 A1 EP1706932 A1 EP 1706932A1 EP 05706855 A EP05706855 A EP 05706855A EP 05706855 A EP05706855 A EP 05706855A EP 1706932 A1 EP1706932 A1 EP 1706932A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- centrifugal pump
- pump unit
- unit according
- rotor
- 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
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/06—Dynamo-electric clutches; Dynamo-electric brakes of the synchronous type
- H02K49/065—Dynamo-electric clutches; Dynamo-electric brakes of the synchronous type hysteresis type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
Definitions
- the invention relates to a centrifugal pump unit with at least one impeller arranged within a pump housing, a pump shaft penetrating a pump housing and a drive adjoining the pump housing, in the area of the drive a drive rotor equipped with permanent magnets is attached and external drive elements transmit a torque to the drive rotor.
- centrifugal pump units of the generic type the drive is usually mounted directly adjacent to the pump housing.
- a centrifugal pump unit is often used as a centrifugal pump of the type of a heating circulation pump and is usually equipped with a variable-speed motor in order to generate a better overall efficiency within a pipeline system via its variable drive speed.
- the drive motor of which is designed as a permanent or permanent magnet motor and is provided with electronic speed control.
- Such electronically commutated drives with their permanently excited AC servo motor improve the efficiency of a heating system.
- centrifugal pump units use a magnetic coupling drive connected to the pump housing as the drive.
- Centrifugal pump units of this type are often used in the field of conveying dangerous media, in particular in the field of chemistry. Both types of these centrifugal pump units are equipped with or without a containment shell or split tube between the drive rotor and the outer drive element.
- an additional assembly is arranged in a magnetic coupling pump between a so-called core element, consisting of a pump housing with shaft, shaft bearing, permanent or permanent magnetic drive rotor and containment shell, and a drive.
- This additional assembly includes a lantern, outer magnetic carrier and various flanges, so that different types of block and standard designs of such a centrifugal pump unit can be realized.
- the invention is based on the problem of increasing the field of application of such centrifugal pump assemblies for centrifugal pump assemblies in which a drive rotor equipped with permanent magnets is arranged on the pump shaft.
- the solution to this problem provides that the drive rotor is designed as a common part for external drive elements in the form of a permanently excited outer magnetic coupling half, in the form of a hysteresis coupling half comprising hysteresis materials or in the form of a motor stand with a winding which generates a rotating field.
- the drive rotor is cylindrical and / or disk-shaped.
- the outer drive element can be hollow-cylindrical and / or disk-shaped.
- the invention is both usable in the usual drive forms of cylindrical design as well as in the so-called disc rotor designs.
- the transmission power is improved by other configurations, according to which the drive rotor is equipped with rare earth permanent magnets on its surface facing the outer drive element. Furthermore, the number of poles 2p implemented with the rare earth permanent magnet must correspond to the number of basic poles of the outer drive element so that stationary synchronous operation can take place. And to protect the magnets from an aggressive, corrosive, erosive or otherwise dangerous fluid to be conveyed, the magnets and / or the drive rotor are surrounded by a sleeve made of non-magnetic material, for example non-magnetic steel.
- a further embodiment provides for the sleeve to be designed as a damper element.
- the sleeve By means of this measure in the manner of a damper cage, the intended use of the drive rotor can easily be extended to drive motors which are designed for controlled operation by a frequency converter.
- a damper element can also be arranged additionally or exclusively below the magnets.
- a gap element is arranged in a manner known per se between the drive rotor and the outer drive element.
- These are known components in the form of a can, a can or a split wall.
- This solution can therefore be used for dry drives as well as for wet drives in the form of canned tubes, split wall motors or hermetically sealed magnetic clutch drives.
- a corresponding diameter adjustment only has to be made on the drive rotor or on the outer drive element in order to take into account the space required for the gap elements.
- a gap element in the form of a can is attached with its opening to the pump housing. In a service case, the outer drive element can thus be replaced without having to open a so-called wet area of a pump.
- a known bearing point for the drive rotor is arranged in the gap element. This enables the control of larger driving forces. For a large number of sizes of such centrifugal pump unit series, standardization of the drive rotor significantly simplifies production and considerably reduces the effort for maintenance and repairs.
- the outer drive element As an outer rotor provided with magnetic materials with pronounced hysteresis properties, the outer rotor and drive rotor form a hysteresis clutch. This results in a tear-proof design of a centrifugal pump unit equipped with a magnetic coupling drive. In contrast to conventional magnetic clutches, this drive ensures that the centrifugal pump unit is unexpectedly overloaded.
- sensor elements are arranged on the drive rotor and outer drive element, which enable electronic control and monitoring of such a drive.
- the outer drive element and the drive rotor can thus form an electronically commutated AC servo motor.
- the outer drive element is designed to be exchangeable in the form of a motor stand or in the form of an outer magnetic coupling half or in the form of an outer hysteresis coupling half. This simplifies the replacement of components in the event of a maintenance event. In the presence of a containment shell, such an exchange is possible without endangering the tightness of the pump set.
- FIG. 1 shows a schematic representation of the structure of the drive of a centrifugal pump unit. Only one wall of a pump housing 1 is shown, on which a drive 2 for a centrifugal pump impeller (not shown here) is arranged. The centrifugal pump impeller is fastened in the pump housing 1 on a pump shaft 3.
- a drive rotor 4 is fastened on the shaft 3 and cooperates as an inner drive element with an outer drive element 5 of the drive 2.
- the outer drive element 5 of the drive 2 here forms a motor stand with a winding for generating a rotating rotating field. This rotating field acts on magnets 6, which are attached to the outer circumference of the drive rotor 4.
- a gap element 7 can be arranged between it and the pump housing 1 or between the outer drive element 5 and the drive rotor 4. Slotted tubes or slotted walls can also be used.
- the gap element 7 is designed as a gap pot, which is fastened with its opening on the pump housing 1 in a liquid-tight manner.
- the distances between the outer drive element 5 and drive rotor 4 and the gap element 7 shown in the exemplary embodiment are of a schematic type and do not correspond to products that are actually to be carried out.
- Sensors 8.1 and 8.2 are arranged on the drive rotor 4 and on the outer drive element 5, with the aid of which it is possible to monitor a rotor position and / or the speed.
- Fig. 2 shows compared to FIG. 1 a modification, according to which in the gap element 7, the containment shell shown here, an additional bearing 9 for the pump shaft 3 is arranged.
- the drive rotor 4 in the drive 2 and in the pump housing 1 can be provided on both sides.
- FIG. 3 shows an embodiment in which a permanently excited outer coupling half in the form of a magnetic coupling or hysteresis coupling is used as the outer drive element 5 as the drive 2 for the drive rotor 4.
- the drive 2 is connected to a motor (not shown here) and is mounted on a motor shaft 10.
- the drive rotor 4 is mounted analogously to FIG. 1 and has no sensor elements in this exemplary embodiment.
- the drive rotor 4 which is designed as a common part, can be used to produce a centrifugal pump unit which consists of pump pen housing, drive rotor, pump shaft and impeller and optionally with or without gap element 7 is provided.
- a centrifugal pump unit which consists of pump pen housing, drive rotor, pump shaft and impeller and optionally with or without gap element 7 is provided.
- Such a pump component can thus be equipped in the simplest manner with a drive in the form of a motor stand or with a magnetic coupling part.
- the outer drive element 5 in the form of a magnetic coupling part is provided with a hysteresis material for the purpose of training as a hysteresis coupling. This enables the formation of a tear-proof coupling. If the magnetic coupling is tightly dimensioned, there is a risk that, in the case of an external drive element 5 in the form of a permanently excited outer coupling half, the frictional connection between the drive rotor 4 and the outer drive element 5 can break off in the event of overloads. In such a case, the drive 2 would have to be braked to a standstill in order to re-establish a magnetic force connection between the driving and driven components in this state. After the drive 2 has been started up again, the delivery capacity can then be resumed.
- an outer drive element 5 in the form of a hysteresis coupling half with hysteresis materials has the advantage that if the pump is overloaded, a slip can occur between the outer drive element 2 and the drive rotor 4 and the original frictional connection is restored after the normal operating state has been reached.
- FIG. 3 can be used in centrifugal pump units with or without a splitting element 7.
- corresponding sealing elements are arranged between the pump housing 1 and the pump shaft 3.
- a gradation in diameter between the drive rotor 4 and the outer drive element 5 is designed as a function of a gap element 7.
- the use of a drive rotor 4 designed as a common part for the various drive options reduces the manufacturing and handling outlay of such a centrifugal pump unit in many ways.
- FIG. 4 shows a drive rotor 4 according to a design according to FIG. 2, a sleeve made of non-magnetic material being arranged in a protective manner around the permanent magnets 6 of the drive rotor 4.
- the magnets 6 can be designed as rare rd permanent magnets.
- FIG. 5 shows a variant of the drive rotor according to FIG. 4, in which a damper element 12 in the form of a so-called short-circuit cage is additionally and below the permanent magnets 6.
- This damper element is arranged in a smaller diameter than the position of the permanent magnets 6 on the drive rotor 4.
- the sleeve 11 can also be designed in an analogous manner as a damper element. With the aid of these damper elements, an improved operation of such a drive rotor 4 in connection with a motor stand is possible, which is fed by a controlled U-F converter.
- FIG. 6 shows a section through the drive rotor 4 according to FIG. 5. It is evident from this that the damper element 12 is formed from a plurality of rods which penetrate the drive rotor in the axial direction. The damper element is designed here in the manner of a squirrel cage.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004003400A DE102004003400B4 (en) | 2004-01-23 | 2004-01-23 | A centrifugal pump unit |
PCT/EP2005/000148 WO2005071818A1 (en) | 2004-01-23 | 2005-01-11 | Centrifugal pump unit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1706932A1 true EP1706932A1 (en) | 2006-10-04 |
Family
ID=34745020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05706855A Ceased EP1706932A1 (en) | 2004-01-23 | 2005-01-11 | Centrifugal pump unit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1706932A1 (en) |
DE (1) | DE102004003400B4 (en) |
WO (1) | WO2005071818A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009060438A1 (en) * | 2009-12-22 | 2011-06-30 | KSB Aktiengesellschaft, 67227 | Rotor with short-circuit cage |
EP2395635A1 (en) * | 2010-06-11 | 2011-12-14 | Ringfeder Power-Transmission GmbH | Permanent magnet clutch |
DE102013008795B3 (en) | 2013-05-24 | 2014-08-21 | Ksb Aktiengesellschaft | pump assembly |
DE102015206460A1 (en) * | 2015-04-10 | 2016-10-13 | Mahle International Gmbh | Magnetic coupling, in particular for a waste heat utilization device |
CN110212736A (en) * | 2019-05-14 | 2019-09-06 | 江苏磁谷科技股份有限公司 | Permanent magnet soft starter |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57180359A (en) * | 1981-04-30 | 1982-11-06 | Hitachi Ltd | Permanent magnet synchronous motor |
DE3429813A1 (en) * | 1984-08-14 | 1986-02-27 | Landert-Motoren-AG, Bülach, Zürich | Permanent-magnet synchronous motor with asynchronous starting |
JPS62277062A (en) * | 1986-05-23 | 1987-12-01 | Daido Steel Co Ltd | Hysteresis coupling |
DE4438132A1 (en) * | 1994-10-27 | 1996-05-02 | Wilo Gmbh | Canned pump |
DE29610798U1 (en) * | 1996-06-20 | 1997-02-27 | Klaus Union Armaturen | Modular kit for producing a pump, in particular a permanent magnet coupling pump |
US5708313A (en) * | 1996-10-28 | 1998-01-13 | Finish Thompson Inc. | Sump pump |
US5831364A (en) * | 1997-01-22 | 1998-11-03 | Ingersoll-Dresser Pump Company | Encapsulated magnet carrier |
DE19746359C2 (en) * | 1997-01-22 | 2003-02-06 | Eugen Schmidt | Adjustable coolant pump for motor vehicles |
JPH1127928A (en) * | 1997-07-07 | 1999-01-29 | Mitsubishi Electric Corp | Torque limiter |
DE19943862A1 (en) * | 1999-09-13 | 2001-03-15 | Wilo Gmbh | Wet rotor pump with mounting plate |
DE10036555A1 (en) * | 2000-07-27 | 2002-02-07 | Wilo Gmbh | Corrosion-protected, immersed electrical pump rotor comprises empty space between discs in casing which is completely filled with plastic |
DE10058267A1 (en) * | 2000-11-23 | 2002-05-29 | Wilo Gmbh | Axial bearing of the rotor of an electrical machine |
DE10060121A1 (en) * | 2000-12-04 | 2002-06-06 | Alstom Switzerland Ltd | Method for manufacture of synchronous motor rotor fitted with permanent magnet, filling resin dough in cracks developed in magnets during manufacture |
DE20312292U1 (en) * | 2003-08-05 | 2003-11-13 | Ksb Ag | Flow machine, especially centrifugal pump, with magnetic coupling drive has hysteresis coupling between drive motor in form of asynchronous three-phase motor and flow machine |
-
2004
- 2004-01-23 DE DE102004003400A patent/DE102004003400B4/en not_active Expired - Lifetime
-
2005
- 2005-01-11 WO PCT/EP2005/000148 patent/WO2005071818A1/en active Application Filing
- 2005-01-11 EP EP05706855A patent/EP1706932A1/en not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO2005071818A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005071818A1 (en) | 2005-08-04 |
DE102004003400A1 (en) | 2005-08-11 |
DE102004003400B4 (en) | 2012-08-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0520333B1 (en) | Pump unit | |
EP0899855B1 (en) | Rotary device with magnetic bearing | |
EP2453555B1 (en) | Pump unit | |
EP0899857B1 (en) | Rotary device with magnetic bearing | |
WO2008119404A1 (en) | Arrangement for delivering fluids | |
EP2735086B1 (en) | Internal rotor motor | |
EP0583301B1 (en) | Electrically drivable motor vehicle | |
EP2678921A2 (en) | Internally exicted synchronous motor comprising a permanent magnet rotor with multiple corrosion protection | |
WO1997008807A1 (en) | Electric motor | |
EP1256722B1 (en) | Centrifugal pump | |
EP2156534A2 (en) | Permanently excited rotor for machine tools | |
EP2908407A2 (en) | Electric drive motor, pump and household appliance comprising such a pump | |
WO1993017484A1 (en) | Electric pump | |
EP1857681B1 (en) | Vane vacuum pump with canned motor | |
WO2005071818A1 (en) | Centrifugal pump unit | |
EP1812714B1 (en) | Arrangement with a ventilator and a pump | |
EP1223658A1 (en) | Permanent magnet Rotor with reduced flux leakage | |
DE102010043391A1 (en) | feed pump | |
EP1794459A1 (en) | Fluid transporting device | |
EP3088745B1 (en) | Rotor assembly for a vacuum pump and vacuum pump | |
DE202005013923U1 (en) | Installation for feed of fluids has rotor of motor connected to second permanent magnet which interacts with first permanent magnet connected to pump wheel in fashion of magnetic clutch | |
DE2335717B2 (en) | ELECTRIC MINIATURE SYNCHRONOUS MOTOR | |
DE2055516B2 (en) | CENTRIFUGAL PUMP IMPELLER DRIVEN BY A MOTOR VIA A MAGNETIC CLUTCH | |
DE102007022904A1 (en) | Direct drive device e.g. synchronous machine, for e.g. agitator, has bearing elements and drive components accommodated within vacuum-tight reactor housing, where device is arranged in mixer housing or in vacuum-tight reactor housing | |
DE1438294A1 (en) | Electromagnetic clutch |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20060713 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20070828 |
|
APBK | Appeal reference recorded |
Free format text: ORIGINAL CODE: EPIDOSNREFNE |
|
APBN | Date of receipt of notice of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA2E |
|
APBR | Date of receipt of statement of grounds of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA3E |
|
APAF | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: KSB SE & CO. KGAA |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
|
APBT | Appeal procedure closed |
Free format text: ORIGINAL CODE: EPIDOSNNOA9E |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 20180927 |