EP0739452B1 - Sheet-metal centrifugal pump impeller with discharge apertures - Google Patents
Sheet-metal centrifugal pump impeller with discharge apertures Download PDFInfo
- Publication number
- EP0739452B1 EP0739452B1 EP95906291A EP95906291A EP0739452B1 EP 0739452 B1 EP0739452 B1 EP 0739452B1 EP 95906291 A EP95906291 A EP 95906291A EP 95906291 A EP95906291 A EP 95906291A EP 0739452 B1 EP0739452 B1 EP 0739452B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- pump impeller
- opening
- impeller
- sheet metal
- 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
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
-
- 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
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
Definitions
- the invention relates to a formed from sheet metal Centrifugal pump impeller, which is in the pressure side cover plate has arranged relief openings.
- FR-A-972 528 is already a centrifugal pump impeller known, the relief openings in their mouth area are guided such that the relief current in one acute angle to the main flow of the impeller. By the main current was causing the discharge current thus greatly reduced.
- the relief openings had one angular course, were in this form only in one massive cover plate, but not in a sheet metal one Realize impeller.
- the object underlying the invention is a Centrifugal pump impeller to create from sheet metal, its low Relief openings to be manufactured Relief flow into the flow in the impeller inlet steer in a direction that is not particularly harmful.
- the object is achieved in that the relief openings each by at least one in the Sheet of the cover plate shaped bulge and a with it connected opening are formed, the bulges and the opening have a course that the relief current in directs a direction roughly parallel to the main flow.
- the production of the relief openings can be done easily Way, optionally simultaneously with one or more further shaping measures for the production of the impeller, accomplish.
- the individual relief opening can be used one, embossed into the cover plate from only one side Bulge or with two opposite one another Bulges are formed.
- the one at the raised end Bulge or opening between two bulges can already arise during the formation of the bulges, so that a further step is not necessary for this.
- the centrifugal pump impeller 1 made of sheet metal is with a Hub 2 arranged on a shaft, not shown.
- the Centrifugal pump impeller 1 has several over its circumference evenly distributed impeller blades 3, which between a front, suction-side cover plate 4 and a rear, pressure-side cover plate 5 are arranged.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Gegenstand der Erfindung ist ein aus Blech geformtes Kreiselpumpenlaufrad, welches in der druckseitigen Deckscheibe angeordnete Entlastungsöffnungen besitzt.The invention relates to a formed from sheet metal Centrifugal pump impeller, which is in the pressure side cover plate has arranged relief openings.
Bisher wurden die Entlastungsöffnungen, die dem Ausgleich des Axialschubes des Laufrades dienen, bei Blechlaufrädern durch Ausstanzen in der druckseitigen Deckscheibe angebracht. Ein Beispiel hierfür ist das Laufrad der WO-A-8 606 799. Der Entlastungsstrom, der von dem auf der Deckscheibe des Laufrades gelegenen Nabenraum über die Entlastungsöffnungen in den Laufradeintritt gelangte, wurde hierbei in eine der Laufradströmung entgegengesetzte Richtung gelenkt oder er traf die Laufradströmung in einem ungünstigen Winkel. Dies beeinträchtigte die hydraulische Leistung des Laufrades, vor allem dessen Saugverhalten, und verminderte den Wirkungsgrad der Kreiselpumpe.So far, the relief openings that compensate for the Serve axial thrust of the impeller, through with sheet metal impellers Punching in the pressure side cover disc attached. A An example of this is the impeller of WO-A-8 606 799. The Discharge current from that on the cover plate of the impeller located hub space over the relief openings in the Impeller entry, was in one of the Impeller flow directed in the opposite direction or he hit the impeller flow at an awkward angle. This impaired the hydraulic performance of the impeller all its suction behavior, and reduced the efficiency the centrifugal pump.
Durch die FR-A-972 528 ist auch bereits ein Kreiselpumpenlaufrad bekannt, dessen Entlastungsöffnungen in ihrem Mündungsbereich derart geführt sind, daß der Entlastungsstrom in einem spitzen Winkel zum Hauptstrom des Laufrades verläuft. Die durch den Entlastungsstrom verursachte Störung des Hauptstroms wurde somit stark verringert. Die Entlastungsöffnungen hatten einen winkelförmigen Verlauf, waren in dieser Form also nur in einer massiven Deckscheibe, nicht aber in einem aus Blech bestehenden Laufrad zu verwirklichen. FR-A-972 528 is already a centrifugal pump impeller known, the relief openings in their mouth area are guided such that the relief current in one acute angle to the main flow of the impeller. By the main current was causing the discharge current thus greatly reduced. The relief openings had one angular course, were in this form only in one massive cover plate, but not in a sheet metal one Realize impeller.
Die der Erfindung zugrundeliegende Aufgabe besteht darin, ein Kreiselpumpenlaufrad aus Blech zu schaffen, dessen mit geringem Aufwand zu fertigende Entlastungsöffnungen die Entlastungsströmung in eine die Strömung im Laufradeintritt wenig beeinträchtigende Richtung lenken.The object underlying the invention is a Centrifugal pump impeller to create from sheet metal, its low Relief openings to be manufactured Relief flow into the flow in the impeller inlet steer in a direction that is not particularly harmful.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Entlastungsöffnungen jeweils durch mindestens eine in das Blech der Deckscheibe geformte Ausbuchtung und eine damit verbundene Öffnung gebildet werden, wobei die Ausbuchtungen und die Öffnung einen Verlauf besitzen, der den Entlastungsstrom in eine in etwa mit dem Hauptstrom gleichlaufende Richtung lenkt.The object is achieved in that the relief openings each by at least one in the Sheet of the cover plate shaped bulge and a with it connected opening are formed, the bulges and the opening have a course that the relief current in directs a direction roughly parallel to the main flow.
Die Herstellung der Entlastungsöffnungen läßt sich auf einfache Weise, gegebenenfalls gleichzeitig mit einer oder mehreren weiteren Formgebungsmaßnahmen zur Herstellung des Laufrades, bewerkstelligen. Dabei kann die einzelne Entlastungsöffnung mit einer, nur von einer Seite in die Deckscheibe geprägte Ausbuchtung oder mit zwei einander gegenüberliegenden Ausbuchtungen gebildet werden. Die am erhöhten Ende einer Ausbuchtung bzw. zwischen zwei Ausbuchtungen gelegene Öffnung kann bereits bei der Ausformung der Ausbuchtungen entstehen, so daß ein weiterer Arbeitsschritt hierfür nicht notwendig ist.The production of the relief openings can be done easily Way, optionally simultaneously with one or more further shaping measures for the production of the impeller, accomplish. The individual relief opening can be used one, embossed into the cover plate from only one side Bulge or with two opposite one another Bulges are formed. The one at the raised end Bulge or opening between two bulges can already arise during the formation of the bulges, so that a further step is not necessary for this.
Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt in
- Fig. 1
- die Teilansicht eines im Schnitt dargestellten erfindungsgemäßen Kreiselpumpenlaufrades, und in
- Fig. 2
- eine Draufsicht auf eine als Einzelheit dargestellte Entlastungsöffnung des Laufrades der Fig. 1.
- Fig. 1
- the partial view of a centrifugal pump impeller according to the invention shown in section, and in
- Fig. 2
- 2 shows a plan view of a relief opening of the impeller of FIG. 1, shown as a detail.
Das aus Blech bestehende Kreiselpumpenlaufrad 1 ist mit einer
Nabe 2 auf einer nicht dargestellten Welle angeordnet. Das
Kreiselpumpenlaufrad 1 besitzt mehrere über seinen Umfang
gleichmäßig verteilte Laufradschaufeln 3, die zwischen einer
vorderen, saugseitigen Deckscheibe 4 und einer hinteren,
druckseitigen Deckscheibe 5 angeordnet sind.The
In der druckseitigen Deckscheibe 5 sind mehrere gleichmäßig
über den Umfang verteilte Entlastungsöffnungen 6 angeordnet,
die jeweils durch zwei mit entgegengesetzter Richtung in die
Deckscheibe 5 gepreßte Ausbuchtungen 7 und 8 und eine zwischen
diesen angeordnete Öffnung 9 gebildet werden. Durch den
Preßvorgang wird die zunächst zwischen den Ausbuchtungen 7 und
8 vorhandene Verbindung aufgerissen, wodurch die Öffnung 9
entsteht. Die Ausbuchtungen 7 und 8 sowie die Öffnung 9 sind so
ausgerichtet, daß der vom Nabenraum 10 in den Laufradeintritt
11 fließende Entlastungsstrom, hier durch einen Pfeil 12
dargestellt, etwa die gleiche Richtung hat wie die durch einen
Pfeil 13 symbolisierte Hauptströmung am Laufradeintritt 11.Several are uniform in the pressure-
Abweichend von der hier dargestellten Form der
Entlastungsöffnung 6 mit zwei Ausbuchtungen 7 und 8, kann die
Entlastungsöffnung auch durch eine einzige Ausbuchtung 7 oder 8
gebildet werden, die jeweils die gleiche Ausformrichtung
besäße, wie hier dargestellt.Deviating from the form shown here
Relief opening 6 with two
Claims (3)
- Centrifugal pump impeller made of sheet metal, which has discharge apertures arranged in the deliveryside cover disc, characterized in that the discharge apertures (6) are each formed by at least one pocket (7, 8) shaped out of the sheet metal of the cover disc (5) and an opening (9) connected thereto, the at least one pocket (7, 8) and the opening (9) having a course which directs the discharge flow (12) in approximately the same direction as the main flow (13).
- Centrifugal pump impeller according to Claim 1, characterized in that the discharge aperture (6) is formed by two pockets (7 and 8), shaped out of the sheet metal of the cover disc (5) from both sides, and an opening (9) arranged between them.
- Method of producing a centrifugal pump impeller according to Claim 1 or 2, characterized by a pressing operation, in which both one or two pockets (7, 8) and, by tearing open the sheet metal of the cover disc (5), an opening (9) are formed.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4400633 | 1994-01-12 | ||
DE4400633A DE4400633A1 (en) | 1994-01-12 | 1994-01-12 | Centrifugal pump impeller made of sheet metal equipped with relief openings |
PCT/EP1995/000016 WO1995019503A1 (en) | 1994-01-12 | 1995-01-04 | Sheet-metal centrifugal pump impeller with discharge apertures |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0739452A1 EP0739452A1 (en) | 1996-10-30 |
EP0739452B1 true EP0739452B1 (en) | 1998-11-04 |
Family
ID=6507746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95906291A Expired - Lifetime EP0739452B1 (en) | 1994-01-12 | 1995-01-04 | Sheet-metal centrifugal pump impeller with discharge apertures |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0739452B1 (en) |
DE (2) | DE4400633A1 (en) |
DK (1) | DK0739452T3 (en) |
WO (1) | WO1995019503A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20140108389A (en) * | 2013-02-26 | 2014-09-11 | 현대중공업 주식회사 | Centrifugal pump having balancing holes |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4561852B2 (en) | 2008-03-26 | 2010-10-13 | 株式会社日立プラントテクノロジー | Impeller |
JP2013148075A (en) * | 2012-01-23 | 2013-08-01 | Mitsubishi Heavy Ind Ltd | Centrifugal fluid machine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE518179C (en) * | 1929-09-20 | 1931-02-12 | Hans Reinecke | Relief of the spaces within the rear sealing rings of the running wheels of rotating hydraulic machines |
FR972528A (en) * | 1948-05-05 | 1951-01-31 | Cie Des Surchauffeurs | Improvements to centrifugal pumps |
US3632220A (en) * | 1970-08-27 | 1972-01-04 | Chrysler Corp | Coolant pump |
DE3517499A1 (en) * | 1985-05-15 | 1986-11-20 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | WHEEL |
JPH05288803A (en) * | 1992-04-14 | 1993-11-05 | Fujitsu Ltd | Ic tray |
-
1994
- 1994-01-12 DE DE4400633A patent/DE4400633A1/en not_active Withdrawn
-
1995
- 1995-01-04 DK DK95906291T patent/DK0739452T3/en active
- 1995-01-04 WO PCT/EP1995/000016 patent/WO1995019503A1/en active IP Right Grant
- 1995-01-04 DE DE59504143T patent/DE59504143D1/en not_active Expired - Lifetime
- 1995-01-04 EP EP95906291A patent/EP0739452B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20140108389A (en) * | 2013-02-26 | 2014-09-11 | 현대중공업 주식회사 | Centrifugal pump having balancing holes |
Also Published As
Publication number | Publication date |
---|---|
WO1995019503A1 (en) | 1995-07-20 |
DE4400633A1 (en) | 1995-07-13 |
DK0739452T3 (en) | 1999-07-19 |
EP0739452A1 (en) | 1996-10-30 |
DE59504143D1 (en) | 1998-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3238972C2 (en) | Horizontally split housing of a fluid flow machine for gases or vapors | |
EP0386010B1 (en) | Wheel for centrifugal pumps | |
DE2421237C2 (en) | Submersible pump | |
DE2720924A1 (en) | FLAP CONNECTION FOR FIXED MUTUAL CONNECTING OF PANEL PIECES AND METHOD FOR PRODUCING SUCH A FLAP CONNECTION | |
EP0303924B1 (en) | Fan rotor manufactured from a thin metal disc, and its production method | |
DE2707776C2 (en) | Self-priming centrifugal pump | |
EP2228541B1 (en) | Rotor for a rotary pump | |
EP1039141B1 (en) | Rotor manufacturing method | |
DE2451207C3 (en) | Valve seat plate for a reciprocating compressor | |
EP0739452B1 (en) | Sheet-metal centrifugal pump impeller with discharge apertures | |
DE2544379A1 (en) | FAN ROTOR FOR A CROSS FLOW FAN | |
EP0646729B1 (en) | Diffusor made of sheet metal | |
EP0118027A2 (en) | Self-priming lateral channel pump | |
DE102017215261A1 (en) | FAN FOR AN ELECTRIC EQUIPMENT | |
DE1071888B (en) | ||
EP1258636B1 (en) | Fan rotor and fan, particularly a radial fan | |
DE69112701T2 (en) | Centrifugal pump. | |
EP3561309B1 (en) | Fan, method for its construction and method for dispensing a medium | |
EP0104544B1 (en) | Axial flow wheel, in particular for axial flow fans | |
DE3326650A1 (en) | CROSS-FLOW FAN WITH AIR EXHAUST SPEED INCREASED IN THE FRONT ZONES | |
DE19746850A1 (en) | Impeller made of sheet metal | |
DE4309479A1 (en) | Radial centrifugal pump | |
EP1369595B1 (en) | Stator for fans, particularly for air coolers | |
EP1055825B1 (en) | Assembled impeller | |
DE102020202611A1 (en) | Diffuser for hydrostatic pressure medium, stamped part for a diffuser, and method for manufacturing a diffuser |
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: 19960418 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE DK FR IT |
|
17Q | First examination report despatched |
Effective date: 19971104 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE DK FR IT |
|
REF | Corresponds to: |
Ref document number: 59504143 Country of ref document: DE Date of ref document: 19981210 |
|
ITF | It: translation for a ep patent filed |
Owner name: DE DOMINICIS & MAYER S.R.L. |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: DK Ref legal event code: 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 |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20140123 Year of fee payment: 20 Ref country code: DE Payment date: 20140107 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20140121 Year of fee payment: 20 Ref country code: IT Payment date: 20140122 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59504143 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EUP Effective date: 20150104 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59504143 Country of ref document: DE |