EP1211422A2 - Rotor eines Spaltmotors für eine Spaltrohrmotorpumpe - Google Patents
Rotor eines Spaltmotors für eine Spaltrohrmotorpumpe Download PDFInfo
- Publication number
- EP1211422A2 EP1211422A2 EP01125950A EP01125950A EP1211422A2 EP 1211422 A2 EP1211422 A2 EP 1211422A2 EP 01125950 A EP01125950 A EP 01125950A EP 01125950 A EP01125950 A EP 01125950A EP 1211422 A2 EP1211422 A2 EP 1211422A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- bearing structure
- drive motor
- motor according
- ring
- 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
Images
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
Definitions
- the invention relates to an electric drive motor for a Centrifugal pump for heating systems in particular, the drive motor a can and one supported therein in at least one bearing structure Has drive shaft with a rotor of the motor and wherein the At the front end of the canned bearing structure provided a stationary Radial bearing part and an adjacent rotating and with the drive shaft comprises non-rotatably connected ring part.
- Electric drive motors of the aforementioned type are general known and are mainly used to drive circulation pumps used in central heating systems in particular. That in these plants circulating water is due to dirt particles and corrosion particles contaminated, which is why from the flow of the respective circulation pump via the front bearing assembly into the can, d. H. in the rotor space of the drive motor, liquid flow arriving as low as must be kept to protect the rotor of the motor from damage preserve. This is especially true when the contaminant particles Magnetite included.
- the object of the invention is to improve an electrical Drive motor of the aforementioned type in that the harmful effects caused by the bearing gap of the front bearing structure liquid flow entering the can inside the Canned tube are at least greatly reduced.
- This solution ensures that a portion of the liquid to be pumped Circulation pump, which over the bearing gap of the front bearing structure in the can penetrates, is held back by the room separation means becomes.
- the room divider can serve as a forced redirection and the liquid portion in the shortest way immediately again via the axial bore the drive shaft of the electric motor back into the circulation pump to let. Further pumping liquid of the circulating pump that is on other ways in the canned pipe to this z. B. to vent and to fill, for example through a filtering passage in a bearing plate, After filling the canned tube, there is essentially none Flow movement more.
- the room separating agent after the Invention is a first sub-space in the can, the front bearing structure is facing, and a remaining sub-space, which is the rotor of the electric motor contains, created.
- the first, constantly flowing portion of liquid thus only gets into the first subspace, so that its contamination particles do not get into the rest of the subspace and the rotor there cannot damage.
- An advantageous embodiment of the invention is that
- the room divider consists of an O-ring between the drive shaft and the rotating ring part of the front bearing assembly is arranged. This embodiment is with very little effort Manufacturing and manufacturing costs.
- the space separating means is designed as an annular wall, on the one hand sealing on the drive shaft and on the other hand sealing on the rotating one Ring part of the front bearing structure rests.
- an elastic cuff can be used.
- the ring wall as a rigid ring wall part with a Ring filter be formed. This means that a Units from the circulation pump and drive motor achieve that mentioned remaining part of the can is flooded through the ring filter, the contaminant particles being retained by the ring filter become.
- the ring filter it consists of permanent magnetic material, so that magnetite particles also the liquid fraction in the remaining sub-space containing the rotor of the can reaches, are filtered out.
- Figures 1 to 5 show the respective electric drive motor only its can with the components provided therein, because of other structure of the respective engine is not the subject of the invention.
- a bearing plate 4 On the front Flange 2 is attached to a bearing plate 4, on which in the usual way Front bearing structure 5 is arranged, which consists of a stationary radial bearing part 6 and a rotating, preferably designed as an axial bearing part Ring part 7 is made.
- a bearing sleeve 8 At the bottom 3 of the can 1 is a bearing sleeve 8 attached, which carries a rear slide bearing 9.
- a drive shaft 10 mounted on which a rotor 11, both a Permanent magnet rotor as well as a squirrel-cage rotor can be non-rotatable is arranged and rotates inside the can 1.
- a front section 12 of the drive shaft 10 protrudes from the bearing plate 4 and carries in the usual way a pump impeller of a centrifugal pump (not shown).
- the ring member 7 is firmly seated in a holder 7 a, which in the recesses 10 a Drive shaft engages.
- the drive shaft 10 has an axial bore 13 provided, which are at least up to the area of the front bearing structure 5 extends, but also, as shown, to the area of rear slide bearing 9 can run.
- one Radial bore 14 is provided in the drive shaft so that the axial bore 13 communicate with the inside of the can for the purpose of venting it can.
- the venting of the can 1 can also be carried out other and known per se, so that it is not necessary that the axial bore 13 extends into the rear area of the drive shaft or the can and extends there with at least one radial bore is provided.
- the end shield 4 has several, circumferentially spaced-apart passages 15 which are each filled with a filter body 16.
- the filter body 16 can be made permanent magnetic material, so that magnetite particles in addition to other impurities from a conveying liquid portion, which passes through the filter body 16 into the interior of the can 1, filtered out become.
- Room separation means provided, which in the example of FIG. 1 from a elastic O-ring 17 is made.
- This O-ring 17 is, for. B. in a circumferential groove the drive shaft 10 arranged so that it on the other hand sealing the rotating axial bearing part 7 of the front bearing structure is applied.
- Viewed from the end shield 4, is in front of the O-ring 17th at least one transverse bore 18 is provided in the drive shaft 10, the opens into the axial bore 13 of the drive shaft.
- the transverse bore 18 and the axial bore 13 a very short Return flow path is formed, via which a proportion of the conveyed liquid over the known bearing gap 19 of the front bearing structure 5 in the Penetrates inside the can, immediately again outside the can is led out.
- the contaminant particles, that are contained in this liquid component can be due to of the O-ring 17 does not get into the rest of the canned interior and thus not cause damage or sources of danger to lead.
- the first commissioning of the drive motor is in this embodiment the shielded by the O-ring 17 and the rotor 11 containing remaining subspace 21 of the can 1 over the filter body or bodies 16 filled in the usual way with a delivery liquid.
- FIG. 3 shows another example of a room separation means.
- this means consists of a closed-walled cuff 22 which partly the drive shaft 10 and partly the thrust bearing part 7 of the front Bearing structure 5 surrounds.
- the cuff 22 is located at each end sealing on the drive shaft or on the thrust bearing part.
- the cuff 22 delimits a first partial space 20 which extends over the at least one transverse bore 18 in the drive shaft 10 with the axial bore 13 of the drive shaft communicates.
- a short return flow path is formed, so that over the bearing gap 19 conveyed liquid penetrated into the first subspace 20 short distances immediately again via the axial bore 13 of the drive shaft is returned.
- the cuff can be made of rubber, plastic or Metal. Incidentally, this embodiment agrees with that in Fig. 1 match.
- a room separation means is shown, which is modified from that in Fig. 3. It consists of a closed-walled ring wall part 23 made of preferably rigid Material and is sealed with one end to the thrust bearing part 7 of the front bearing structure 5. At its other end is the ring wall part 23 connected to a ring filter 24, which in turn seals the drive shaft 10 is present.
- parts 23 and 24 can also be done in such a way that the ring wall part 23 with its other end sealingly abuts the shaft 10 and on desired Places is interspersed with one or more filters.
- the end shield 4 is also closed-walled formed because the filling of the remaining subspace 21 in the can 1 via the ring filter 24.
- the ring filter 24 sets up a short-path backflow process, i. H. that the proportion of liquid that passes through the front bearing gap 19 in the arrives first subspace 20, immediately via the transverse bore 18 and the axial bore 13 of the drive shaft 10 again in the impeller space on the Drive motor connected circulation pump of the centrifugal type flows back.
- the ring filter 24 can consist of permanent magnetic material and will be installed if the connected centrifugal pump has a Pump liquid with magnetite particles. The same applies in alternative filters to the ring filter 24.
- FIGS. 1, 3 and 4 show a drive shaft 10 which is also supported at its rear end, namely by the rear Radial bearing 9.
- the rear bearing 9 is missing. That means it can be enough in all cases that the front bearing structure 5 alone carries the drive shaft.
- a rigid sealing ring as a rotating one Ring part 7 can have.
- the axial force of the Shaft 10 added by another design (not shown).
- a small closed-walled sleeve 25 is also provided, around the front annulus 20 safely against the rest To seal subspace 21 of the can 1.
- the cuff 25 lies in each case sealing the sealing ring 7 and on the drive shaft 10.
- FIGS. 1, 3, 4 and 5 have a bearing plate 4 for the front bearing structure 5.
- the end shield can be omitted if the can 1 at its front end due to the required Engine power or other circumstances for safe inclusion of the front bearing structure to be designed accordingly can.
- the rotating ring part 7 be it an axial bearing part or just a sealing ring, on the one hand, the seal on the radial bearing part 6 of the front Ensure bearing structure 5 and be lubricated on the other hand.
- the ring part 7 has several on its side facing the bearing part 6 Lubrication pockets 7 c, which are filled with the liquid of the can 1 and are designed so that they are circumferentially closed Ensure pressure area 7 b of the relevant bearing part side.
- a centrifugal pump driven by the drive motor described above is driven, for example in heating systems can also be used in air conditioning systems.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
- Fig. 1
- eine erste Ausführungsform im Axialschnitt,
- Fig. 2
- eine Ansicht nach der Linie II-II in Fig. 1,
- Fig. 3, 4 und 5
- eine zweite, dritte bzw. vierte Ausführungsform im Axialschnitt.
Claims (10)
- Elektrischer Antriebsmotor für eine Kreiselpumpe für insbesondere Heizungsanlagen, wobei der Antriebsmotor ein Spaltrohr und eine darin in wenigstens einem Lageraufbau abgestützte Antriebswelle mit einem Rotor des Motors aufweist und wobei der am Vorderende des Spaltrohres vorgesehene Lageraufbau ein stationäres Radiallagerteil und ein daran anliegendes, rotierendes und mit der Antriebswelle drehfest verbundenes Ringteil umfasst, dadurch gekennzeichnet, dass in dem Spaltrohr (1)ein Raumtrennungsmittel (17; 22;23,24) vorgesehen ist, das einerseits an der Antriebswelle (10) und andererseits an dem rotierenden Ringteil (7) des Lageraufbaus (5) befestigt ist und einen vorderen Ringraum (20) abgrenzt.
- Elektrischer Antriebsmotor nach Anspruch 1, dadurch gekennzeichnet, dass die Antriebswelle (10) eine Axialborhung (13) aufweist, die vom Vorderende der Antriebswelle bis wenigstens in den Bereich des Lageraufbaus verläuft, und dass der vordere Ringraum (20) eine Strömungsverbindung (18) zu der Axialbohrung (13) hat.
- Elektrischer Antriebsmotor nach Anspruch 2, dadurch gekennzeichnet, dass das Raumtrennungsmittel aus einem O-Ring (17) besteht, derzwischen der Antriebswelle (10) und dem rotierenden, als Axiallagerteil ausgebildeten Ringteil (7) des Lageraufbaus (5) angeordnet ist, und dass die Strömungsverbindung (18) aus wenigstens einer Querbohrung in der Antriebswelle (12)besteht.
- Elektrischer Antriebsmotor nach Anspruch 2, dadurch gekennzeichnet, dass das Raumtrennungsmittel aus einer geschlossenwandigen Manschette (22) besteht, die einerseits dichtend an der Antriebswelle (10) und andererseits dichtend an dem rotierenden, als Axiallagerteil ausgebildeten Ringteil (7) des Lageraufbaus (5) befestigt ist, und dass die Strömungsverbindung (18) wenigstens eine Querbohrung in der Antriebswelle (10) ist.
- Elektrischer Antriebsmotor nach Anspruch 4, dadurch gekennzeichnet, dass die Manschette (22) aus Gummi, Kunststoff oder Metall besteht.
- Elektrischer Antriebsmotor nach Anspruch 2, dadurch gekennzeichnet, dass das Raumtrennungsmittel aus einem geschlossenwandigen, starren Ringwandteil (23) besteht, das einerseits dichtend an dem rotierenden, als Axiallagerteil ausgebildeten Ringteil (7) des Lageraufbaus (5) und andererseits an der Antriebswelle (12) befestigt ist, dass das Ringwandteil mit Filtermitteln (24) versehen ist und dass die Strömungsverbindung (18) wenigstens eine Querbohrung in der Antriebswelle (10) ist.
- Elektrischer Antriebsmotor nach Anspruch 6, dadurch gekennzeichnet, dass die Filtermittel (24) aus einem Ringfilter bestehen.
- Elektrischer Antriebsmotor nach Anspruch 6, dadurch gekennzeichnet, dass die Filtermittel (24) aus permanentmagnetischem Material bestehen.
- Elektrischer Antriebsmotor nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, dass das rotierende, Ringteil (7) des Lageraufbaus (5) eine umfangsmäßig geschlossene Druckfläche (7b) aufweist.
- Elektrischer Antriebsmotor nach Anspruch 2, dadurch gekennzeichnet, dass das rotierende Ringteil (7) aus einem starren Dichtungsring besteht, dass das Raumtrennungsmittel aus einer geschlossenwandigen Manschette (25) besteht, die einerseits dichtend an der Antriebswelle (10) und andererseits dichtend an dem rotierenden starren Dichtungsring (7) befestigt ist, und dass die Strömungsverbindung (18) wenigstens eine Querbohrung in der Antriebswelle (10) ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10059458 | 2000-11-30 | ||
| DE10059458A DE10059458A1 (de) | 2000-11-30 | 2000-11-30 | Elektrischer Antriebsmotor für eine Kreiselpumpe für insbesondere Heizungsanlagen |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1211422A2 true EP1211422A2 (de) | 2002-06-05 |
| EP1211422A3 EP1211422A3 (de) | 2005-04-27 |
| EP1211422B1 EP1211422B1 (de) | 2007-04-25 |
Family
ID=7665245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01125950A Expired - Lifetime EP1211422B1 (de) | 2000-11-30 | 2001-10-31 | Rotor eines Spaltmotors für eine Spaltrohrmotorpumpe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1211422B1 (de) |
| AT (1) | ATE360755T1 (de) |
| DE (2) | DE10059458A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1372248A3 (de) * | 2002-06-13 | 2005-07-20 | Wilo Ag | Verfahren zur Montage eines Spalttopfmotors |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10216402A1 (de) * | 2002-04-12 | 2003-10-23 | Wilo Gmbh | Kreiselpumpe mit integriertem Magnetfilter |
| DE102004023790B4 (de) | 2004-05-07 | 2016-02-18 | Xylem Ip Holdings Llc | Umwälzpumpe und Verfahren zur Flüssigkeitsschmierung eines sphärischen Lagers in einem Elektromotor |
| DE102009034158B4 (de) * | 2009-07-20 | 2023-11-16 | Flender Gmbh | Kapselung einer elektrischen Maschine |
| DE102012012443A1 (de) * | 2012-06-22 | 2013-12-24 | Wilo Se | Motorkreiselpumpe mit einer Gleitringdichtung |
| DE102017206089B4 (de) * | 2017-04-10 | 2020-01-16 | BSH Hausgeräte GmbH | Nassläufer-Pumpe und Haushaltsgerät |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE805408C (de) * | 1949-08-06 | 1951-05-17 | Pleuger K G | Einrichtung zum Schutz von unter Fluessigkeiten arbeitenden Elektromotoren gegen das Eindringen von Verunreinigungen |
| CH532201A (de) * | 1970-12-11 | 1972-12-31 | Inventio Ag | Schmier- und Filtereinrichtung für Umwälzpumpe |
| DE3511464A1 (de) * | 1985-03-29 | 1986-10-09 | Halm, Richard, 7066 Baltmannsweiler | Fluessigkeitspumpe |
| DE9116641U1 (de) * | 1991-06-22 | 1993-05-19 | Grundfos A/S, Bjerringbro | Gleitlager mit einem elastischen Mantel für einen Kreiselpumpenmotor |
| DE19525704C1 (de) * | 1995-07-14 | 1996-07-25 | Grundfos As | Gekapselter Rotor |
-
2000
- 2000-11-30 DE DE10059458A patent/DE10059458A1/de not_active Withdrawn
-
2001
- 2001-10-31 DE DE50112399T patent/DE50112399D1/de not_active Expired - Lifetime
- 2001-10-31 AT AT01125950T patent/ATE360755T1/de not_active IP Right Cessation
- 2001-10-31 EP EP01125950A patent/EP1211422B1/de not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1372248A3 (de) * | 2002-06-13 | 2005-07-20 | Wilo Ag | Verfahren zur Montage eines Spalttopfmotors |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1211422B1 (de) | 2007-04-25 |
| DE50112399D1 (de) | 2007-06-06 |
| ATE360755T1 (de) | 2007-05-15 |
| EP1211422A3 (de) | 2005-04-27 |
| DE10059458A1 (de) | 2002-06-13 |
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