EP1258635B1 - Pumpenlaufrad - Google Patents
Pumpenlaufrad Download PDFInfo
- Publication number
- EP1258635B1 EP1258635B1 EP02076680A EP02076680A EP1258635B1 EP 1258635 B1 EP1258635 B1 EP 1258635B1 EP 02076680 A EP02076680 A EP 02076680A EP 02076680 A EP02076680 A EP 02076680A EP 1258635 B1 EP1258635 B1 EP 1258635B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow channel
- impeller
- channel
- pump impeller
- impeller according
- 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
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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
Definitions
- the present invention relates to an impeller for a pump used for pumping liquid substances, such as waste water, said impeller containing at least one flow channel of a spatially curved shape.
- Prior-art impellers of centrifugal pumps designed for the pumping of liquids have a shield and a hub of a rotationally symmetrical structure and between them one or more blades of e.g. a spiral shape, serving to form one or more spatially curved flow channels in the impeller.
- waste waters In addition to waste liquids, waste waters also contain solid waste, such as pieces of cloth and other solid bodies. In the pumping of waste water, these solid pieces cause interruptions in operation as well as power losses in the pumps because they may stick to the blades of the pump impeller or accumulate as lumps inside the impeller. For this reason, the flow channels of the impellers of waste water pumps are often so implemented that they have a large cross-sectional area to allow especially large solid bodies to pass through the channel without clogging the pump. Also, to achieve a more effective flow and to reduce the risk of clogging, the impeller blade may also be so shaped that it has a larger thickness in the middle than at the ends. Such an impeller is disclosed e.g. in SE specification 426976. It is also possible sharpen the leading edge of the impeller so that it will cut solid bodies of waste present in the waste water into smaller pieces, as described e.g. in US patent 4,347,035.
- the liquid flowing into the impeller meets upon entering the impeller the edge of a blade and is divided into two separate liquid flows on opposite sides of the blade. This causes extra work and at the same time extra power consumption. In addition, pieces of solid waste may stick to the edge of the blade.
- GB 687 514 discloses an impeller for centrifugal pumps having a flow channel comprising a first axial part parallel to the suction inlet and a second transverse part in the plane of the outlet channel. Between these two parts the channel has a bend.
- the channel does not meet itself.
- the flow channel does not meet itself but another object, the periphery of the impeller, instead.
- Prior-art impellers have a relatively poor efficiency, and additionally pieces of solid waste may cause interruptions in operation and power losses.
- the object of the invention is to eliminate the drawbacks of prior-art solutions and to achieve a completely new type of impeller for a pump used e.g. for the pumping of waste water, making it possible to achieve a simple construction and a substantially better efficiency than in prior-art impellers.
- the structure of the pump impeller of the invention is based on the idea that, in the design of the pump impeller of the invention, instead of defining the shape of the blade between the shield and the hub as in the design of prior-art impellers, the shape of the flow channel is defined. This can be done by defining a spatially curved line, along which the cross-section is varied.
- the impeller of the invention has a uniformly continuous structure; in other words, it has no actual blade structure at all.
- the flow channel has an evenly curved shape, i.e. it has no abrupt bends due to blades or the like, and, unlike prior-art flow channels, at its end the flow channel meets itself or, in the case of an impeller with several channels, another channel, a structure resembling the trailing edge of a blade being formed at this meeting point.
- the cross-section of the channel remains constant or changes evenly without any sharp changes in shape and/or cross-sectional area.
- FIGS 1 - 4 present an impeller according to the invention for a centrifugal pump, especially one intended for the pumping of waste water.
- the impeller has a cast-metal body 1 provided with a spatially curved flow channel 2. At the upper end of the body 1 there is a circular suction port 3 of a size corresponding to the diameter of an intake waste water pipe, through which port the waste water is passed in from the waste water pipe.
- the impeller is provided with a hole 4 for a drive shaft going through it.
- the shape of the flow channel 2 is defined. This is done by giving a line 5 (dotted broken line) spatially curved in the direction of flow, along which is carried a constant or slowly changing cross-section A.
- the cross-section A may be of a circular form as in Fig. 4. Advancing along the curved line 5, the edge of the cross-section defines the edges 6 (broken line) of the flow channel 2 and also those of an imaginary extension of it as presented in the drawings.
- the curved line 5 may be a spiral line such that it has at first a vertical portion at the center of the suction port 3, running in the direction of the center axis of the impeller, whereafter it begins to bend spatially into a spiral form. In the final portion of the channel, the curve forms a planar spiral.
- the line 5 has a spatial curvature, differing in this respect from planar curves.
- its curvature is gentle and continuous, i.e. its radius of curvature remains at least approximately the same all the time, so there are no sharp bends in the channel.
- the form and area of the cross-section A of the channel may change evenly and continuously. Thus, the waste water flows continuously in the direction of the channel.
- the body 1 has a uniformly continuous structure without separate structures, such as shield, hub or blade structures.
- Fig. 5 presents another impeller according to the invention, designed especially for a centrifugal pump intended for the pumping of waste water. It has a cast-metal body containing a flow channel 12 spatially curved as in the case of Fig. 1 - 4. At the upper end of the body there is a circular suction port 13 of a size corresponding to the diameter of an intake waste water pipe, through which port the waste water is passed from the waste water pipe.
- the impeller is provided with a through hole for a drive shaft.
- the cross-section A1 of the flow channel changes from a substantially circular form to a form such that the outer wall 14 of the flow channel is substantially straight at the point where the channel meets itself, so the cross-section of the channel has the shape of letter D (see Fig. 5), whereafter the inner edge 15 also begins to straighten out, being also straight at the end of the channel, the cross-section of the channel thus having a rectangular form.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Claims (8)
- Pumpenlaufrad für eine zum Pumpen von flüssigen Substanzen, wie beispielsweise Abwasser, verwendete Pumpe, wobei das Pumpenlaufrad wenigstens einen Strömungskanal (2, 12) mit einer räumlich gekrümmten Form enthält, wobei der Strömungskanal von gleichmäßig gekrümmter Form ist,
dadurch gekennzeichnet,
dass in dem abschließenden Abschnitt des Kanals der Strömungskanal (2, 12) sich selbst oder sofern das Pumpenlaufrad mehr als einen Strömungskanal besitzt einen anderen Kanal trifft. - Pumpenlaufrad nach Anspruch 1,
dadurch gekennzeichnet,
dass der Krümmungsradius des Strömungskanals im Wesentlichen konstant ist oder sich gleichmäßig verändert. - Pumpenlaufrad nach Anspruch 1,
dadurch gekennzeichnet,
dass die Form des Strömungskanals (2) in der Strömungsrichtung auf der Grundlage einer räumlich gekrümmten Linie (5) festgelegt wird, und
dass die Kante des Querschnittes die Kanten (6) des Strömungskanals (2) begrenzt, wenn dieser sich längs der gekrümmten Linie fortsetzt. - Pumpenlaufrad nach Anspruch 1,
dadurch gekennzeichnet,
dass die gekrümmte Linie (5) eine zumindest im Wesentlichen spiralförmige Form besitzt. - Pumpenlaufrad nach Anspruch 1,
dadurch gekennzeichnet,
dass die Struktur gleichmäßig, kontinuierlich ohne separate Strukturen, wie beispielsweise Schild-, Naben- und/oder Lamellenstrukturen ist. - Pumpenlaufrad nach Anspruch 1,
dadurch gekennzeichnet,
dass der Querschnitt (A, A1) des Strömungskanals konstant ist oder sich gleichmäßig ändert. - Pumpenlaufrad nach Anspruch 6,
dadurch gekennzeichnet,
dass der Querschnitt des Strömungskanals sich von einer im Wesentlichen kreisförmigen Form in eine Form derart ändert, dass zumindest eine Außenwand (14) des Strömungskanals in dem abschließenden Abschnitt im Wesentlichen gradlinig ist. - Pumpenlaufrad nach Anspruch 6 oder 7,
dadurch gekennzeichnet,
dass eine innere Wand (15) des Strömungskanal ebenfalls in dem abschließenden Abschnitt des Strömungskanals im Wesentlichen geradlinig ist, insbesondere am Ende des Strömungskanals, sodass der Querschnitt des Strömungskanals in seinem abschließenden Abschnitt im Wesentlichen rechtwinklig ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20010887 | 2001-04-27 | ||
FI20010887A FI110275B (fi) | 2001-04-27 | 2001-04-27 | Pumpun juoksupyörä |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1258635A1 EP1258635A1 (de) | 2002-11-20 |
EP1258635B1 true EP1258635B1 (de) | 2006-05-31 |
Family
ID=8561081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02076680A Expired - Lifetime EP1258635B1 (de) | 2001-04-27 | 2002-04-29 | Pumpenlaufrad |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1258635B1 (de) |
AT (1) | ATE328203T1 (de) |
DE (1) | DE60211797T2 (de) |
ES (1) | ES2266401T3 (de) |
FI (1) | FI110275B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2930367B1 (de) | 2013-07-05 | 2020-05-27 | Ebara Corporation | Pumpenklinge für eine unterwasserpumpe und tauchpumpe damit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4713066B2 (ja) | 2003-07-18 | 2011-06-29 | 新明和工業株式会社 | 羽根車及びそれを備えた汚水処理用ポンプ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB687514A (en) * | 1950-08-15 | 1953-02-18 | Fairbanks Morse & Co | Improvements in impellers for centrifugal pumps |
DE3211230A1 (de) * | 1982-03-26 | 1983-09-29 | Paul Pleiger Maschinenfabrik, 5810 Witten | Kreiselpumpe, insbesondere fuer schmutz- und abwasser |
-
2001
- 2001-04-27 FI FI20010887A patent/FI110275B/fi not_active IP Right Cessation
-
2002
- 2002-04-29 EP EP02076680A patent/EP1258635B1/de not_active Expired - Lifetime
- 2002-04-29 ES ES02076680T patent/ES2266401T3/es not_active Expired - Lifetime
- 2002-04-29 AT AT02076680T patent/ATE328203T1/de not_active IP Right Cessation
- 2002-04-29 DE DE60211797T patent/DE60211797T2/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2930367B1 (de) | 2013-07-05 | 2020-05-27 | Ebara Corporation | Pumpenklinge für eine unterwasserpumpe und tauchpumpe damit |
Also Published As
Publication number | Publication date |
---|---|
DE60211797D1 (de) | 2006-07-06 |
DE60211797T2 (de) | 2007-05-16 |
ATE328203T1 (de) | 2006-06-15 |
FI20010887A0 (fi) | 2001-04-27 |
ES2266401T3 (es) | 2007-03-01 |
FI110275B (fi) | 2002-12-31 |
FI20010887A (fi) | 2002-10-28 |
EP1258635A1 (de) | 2002-11-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8025479B2 (en) | Impeller | |
US7037069B2 (en) | Impeller and wear plate | |
CN110185655B (zh) | 指状泵 | |
EP2295808B2 (de) | Fischfreundliche Wasserturbine oder WasserPumpe | |
MX2010013007A (es) | Mejoras relacionadas a rotores de bombas centrifugas. | |
US6837684B2 (en) | Pump impeller | |
US5487644A (en) | Pump having a single or a plurality of helical blades | |
EP1747377B1 (de) | Laufrad | |
JP4713066B2 (ja) | 羽根車及びそれを備えた汚水処理用ポンプ | |
EP1258635B1 (de) | Pumpenlaufrad | |
CN107299914B (zh) | 一种潜污泵双蜗壳泵体及设计方法 | |
JPH094585A (ja) | 汚水ポンプ | |
US20170009777A1 (en) | Fluid pump | |
JP3980708B2 (ja) | 汚水用ポンプの羽根車及び汚水用ポンプ | |
US4614478A (en) | Pump impeller | |
JPH04279795A (ja) | ポンプ | |
EP0527227A1 (de) | Pumpe mit spiralförmigen schaufeln | |
JPH05321867A (ja) | 混流羽根と遠心羽根を一体化した複合インペラー | |
CN109964043A (zh) | 螺旋叶轮 | |
CA3117818C (en) | Eddy pump | |
US20240141915A1 (en) | Pump comprising an impeller body provided as an oblique cone | |
EP4130489A1 (de) | Druckhülse für eine flüssigkeitspumpe und pumpe mit der druckhülse | |
JP2022158118A (ja) | 渦巻きポンプ用ケーシング及び渦巻きポンプ | |
JPH0968184A (ja) | 渦流ポンプ | |
FI110710B (fi) | Keskipakopumppu |
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 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20030130 |
|
AKX | Designation fees paid |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
17Q | First examination report despatched |
Effective date: 20030624 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: LI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: CH Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20060531 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 60211797 Country of ref document: DE Date of ref document: 20060706 Kind code of ref document: P |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060831 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20061031 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2266401 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
EN | Fr: translation not filed | ||
26N | No opposition filed |
Effective date: 20070301 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060901 Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070309 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070430 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070430 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070429 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060531 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20210503 Year of fee payment: 20 Ref country code: IT Payment date: 20210429 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20210510 Year of fee payment: 20 Ref country code: GB Payment date: 20210430 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 60211797 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20220428 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20220629 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20220428 Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20220430 |