EP2786021A2 - Nassläufer-motorpumpe - Google Patents
Nassläufer-motorpumpeInfo
- Publication number
- EP2786021A2 EP2786021A2 EP12818777.0A EP12818777A EP2786021A2 EP 2786021 A2 EP2786021 A2 EP 2786021A2 EP 12818777 A EP12818777 A EP 12818777A EP 2786021 A2 EP2786021 A2 EP 2786021A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- pump
- motor
- rotor
- motor 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
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
- 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
- F04D13/0613—Special connection between the rotor compartments
-
- 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
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/60—Shafts
- F05D2240/61—Hollow
Definitions
- the invention relates to a wet-rotor motor pump with a split tube, which separates the motor stator from the motor shaft mounted in the can, carrying a rotor core, which projects into the pump chamber and carries there the pump impeller.
- Conventional heating circulation pumps are made up of the following main components: drive motor, pump housing and impeller.
- the engine is usually one
- Electric motor in wet rotor design The impeller is often a radial runner and transmits the power of the motor to the medium.
- the rotor of the electric motor In these wet-running pumps, the rotor of the electric motor is surrounded by the medium.
- the stator is separated from the medium by a canned / pot.
- the bearings of the rotor are lubricated by the medium.
- Such constructions are maintenance-free and have a very long life as long as the medium is relatively clean.
- the rotor of the motor is designed with a shaft bore.
- the media are with particles and
- the object of the invention is to limit the flow through the rotor space to a very small value, in addition essentially independent of
- separating partition wall and the impeller rear side consists of a coaxial annular space, of which at least one located in the partition wall
- the fluid flows into the rotor chamber surrounding the rotor tube to flow back into the pump chamber after flowing through the rotor chamber, in particular by the longitudinal cavity of the motor shaft, that the back of the pump impeller has a coaxial annular
- the annular space is connected to the pump suction side via at least one throttled opening in the impeller rear wall and / or in the wall of the hollow motor shaft.
- the coaxial annular projection has the shape of a cylinder liner, which is integrally formed on the rear wheel. Also, the annular space on the crevice tube interior side facing by a sealing ring, for. Limited floating ring whose outer wall with the inside of the annular projection forms the throttle gap.
- the coaxial annular projection has the shape of a cylinder liner, which is integrally formed on the rear wheel. Also, the annular space on the crevice tube interior side facing by a sealing ring, for. Limited floating ring whose outer wall with the inside of the annular projection forms the throttle gap.
- annular sheet metal part which lies between the Spaltrohrflansch and the sealing ring.
- a filter plug is located near the impeller.
- the throttled opening (s) in the wall of the hollow motor shaft of the filter plug in the flow direction of the hollow shaft flow in front of the / the throttled opening (s). It is also advantageous if the motor hollow shaft in the longitudinal cavity of the hollow motor shaft.
- the impeller has a rear support disk on which the impeller blades are arranged, wherein on the back of the impeller
- Support disc permanent magnets are attached, for trapping in the
- Promotional fluid contained particles wherein the support disc is made of plastic, that the magnets are disposed within the plastic of the support disc and that the magnet side, which faces the located on the back of the support disc flow is covered by a layer of material.
- the material layer covering the magnets ensures that the magnetisable particles do not adhere to the magnet of the impeller, but through the ones on the backside of the impeller Impeller-acting centrifugal forces are conveyed into the pump chamber and thus promoted to the pump outlet.
- the magnets have it for the
- magnetizable particles a diverting effect, being sure that they do not adhere to the magnet and thus does not worsen the efficiency of the impeller.
- Impeller as well as in the wall of the hollow shaft is shown, and wherein the throttled opening only in the impeller or only in the hollow shaft, or as a third
- the wet-rotor motor pump has, as a centrifugal pump, an impeller 1 which is driven by a coaxial hollow shaft 2 which carries a rotor core 3 which rotates within the stator 4 of the electric motor.
- the rotor core 3 is separated from the stator by a split tube 5, which is flowed through by the conveyed medium, so that the bearings 6, 7 located in the can 5 are lubricated and cooled.
- the can is closed at the back so that it is also possible to speak of a "can".
- the split tube 5 forms on the impeller end facing a
- Spaltrohrflansch 8 on which an annular partition wall 9 in the form of a sheet metal part is applied to separate the pump chamber 10 from the interior of the can 5.
- partition wall 9 there is at least one flow opening, so that conveying medium enters the interior of the can 5.
- annular projection 11 On the back of the pump impeller 1, an annular projection 11 is integrally formed coaxially, so that within this projection, an annular space 12 is formed, which is separated from the rest of the pump chamber 10 to a throttle gap 13.
- This throttle gap 13 is between the front end of the annular projection 11 and the partition wall 9 and / or between the annular projection 11 and a sealing coaxial sealing ring 14 is formed, which surrounds the hollow shaft 2 and rests against the partition wall 9.
- the annular projection 11 has substantially the shape of a cylinder liner, which is integrally formed on the impeller back. Due to the dimensions of the annular projection 11 and in particular by the floating
- Sealing ring 14 is very precisely the size of the throttle gap 13, which is substantially annular, determinable and thus fixable how much fluid from the
- Annulus 12 flows into the interior of the can 5.
- the fluid pressure within the annular space 12 is reduced by arranging at least one throttled opening 15 in the rear wall of the impeller 1 and / or at least one throttled opening 16 in the wall of the hollow shaft 2, through the liquid present in the annular space 12 to the suction side of the pump flows.
- the fluid pressure in the annular space 12 is considerably lower than the pressure at the pressure side of the pump and higher than the pressure at the suction side of the pump.
- pressure and flow in the annular space 12 are relatively constant, so that pressure and flow are kept constant in the interior of the can substantially independent of the operating point of the pump.
- Valve plug 19 When the throttled opening 16 is arranged in the hollow shaft wall, this plug is offset further inwards, as indicated by dashed lines, so that when the opening 16 is arranged the filter plug 19 lies in the flow direction of the hollow shaft flow in front of the throttled opening 16.
- the effect of the magnetic force acting on the particles that the aspiring by the Radreteraumströmung to the center (wave) particles are deflected by these magnets on the impeller back to the impeller rear wall and are pushed back by the centrifugal force acting here in the pump chamber, without the engine rotor space within the Can reach gap pot or canned and without getting into the camp.
- the magnets can be designed differently, eg as a ring,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011119626A DE102011119626A1 (de) | 2011-11-29 | 2011-11-29 | Nassläufer-Motorpumpe |
PCT/EP2012/004852 WO2013079179A2 (de) | 2011-11-29 | 2012-11-23 | Nassläufer-motorpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2786021A2 true EP2786021A2 (de) | 2014-10-08 |
EP2786021B1 EP2786021B1 (de) | 2020-02-12 |
Family
ID=47603521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12818777.0A Revoked EP2786021B1 (de) | 2011-11-29 | 2012-11-23 | Nassläufer-motorpumpe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2786021B1 (de) |
CN (1) | CN103998787B (de) |
DE (1) | DE102011119626A1 (de) |
WO (1) | WO2013079179A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3017907B1 (fr) * | 2014-02-26 | 2019-01-25 | Wilo Salmson France | Pompe de circulation de fluide comportant deux sous-ensembles dont l'un est amovible par rapport a l'autre |
PL3425221T3 (pl) * | 2017-07-06 | 2020-05-18 | Grundfos Holding A/S | Element ustalający łożysko pompy |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3220350A (en) | 1964-09-03 | 1965-11-30 | Crane Co | Motor driven pump |
US3280750A (en) * | 1964-09-17 | 1966-10-25 | Crane Co | Motor driven pump |
JPS51111902A (en) * | 1975-03-26 | 1976-10-02 | Iwaki:Kk | Magnet pump |
DE3232473A1 (de) | 1982-09-01 | 1984-03-01 | Reinecker Heyko Dipl Ing Fh | Kreiselpumpe mit spaltrohr-magnetkupplung |
DE3639720C1 (de) * | 1986-11-20 | 1993-04-29 | Reinecker Heyko | Pumpe mit Spaltrohrmotor- oder Spaltrohrmagnetkupplungsantrieb |
DE8708334U1 (de) * | 1987-06-12 | 1987-07-30 | Dickow-Pumpen KG, 8264 Waldkraiburg | Kreiselpumpe |
US5248245A (en) * | 1992-11-02 | 1993-09-28 | Ingersoll-Dresser Pump Company | Magnetically coupled centrifugal pump with improved casting and lubrication |
GB2290113B (en) * | 1994-05-31 | 1998-07-15 | Ingersoll Dresser Pump Co | Centrifugal pump |
DE29610799U1 (de) * | 1996-06-20 | 1997-02-27 | Klaus Union Armaturen | Hydrodynamisches Gleitlager für einen Läufer einer Pumpe |
DE10240800B4 (de) * | 2002-08-30 | 2005-03-24 | Munsch Chemie-Pumpen Gmbh | Pumpe für chemisch aggressive Fördermedien |
DE10322464B4 (de) | 2003-05-16 | 2012-05-03 | Ksb Ag | Spaltrohrmotorpumpe |
DE102004019721A1 (de) * | 2004-03-18 | 2005-10-06 | Medos Medizintechnik Ag | Pumpe |
CN201209565Y (zh) * | 2008-05-29 | 2009-03-18 | 杭州大路实业有限公司 | 防颗粒磨损的磁力泵 |
CN201297259Y (zh) * | 2008-12-01 | 2009-08-26 | 张良光 | 一种高温高压磁力泵 |
-
2011
- 2011-11-29 DE DE102011119626A patent/DE102011119626A1/de not_active Withdrawn
-
2012
- 2012-11-23 EP EP12818777.0A patent/EP2786021B1/de not_active Revoked
- 2012-11-23 WO PCT/EP2012/004852 patent/WO2013079179A2/de active Application Filing
- 2012-11-23 CN CN201280062017.9A patent/CN103998787B/zh active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013079179A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013079179A4 (de) | 2014-02-13 |
WO2013079179A2 (de) | 2013-06-06 |
DE102011119626A1 (de) | 2013-05-29 |
CN103998787B (zh) | 2017-11-17 |
CN103998787A (zh) | 2014-08-20 |
WO2013079179A3 (de) | 2013-12-27 |
EP2786021B1 (de) | 2020-02-12 |
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