EP0294308B1 - Bladed impellor for centrifugal pumps - Google Patents

Bladed impellor for centrifugal pumps Download PDF

Info

Publication number
EP0294308B1
EP0294308B1 EP88500056A EP88500056A EP0294308B1 EP 0294308 B1 EP0294308 B1 EP 0294308B1 EP 88500056 A EP88500056 A EP 88500056A EP 88500056 A EP88500056 A EP 88500056A EP 0294308 B1 EP0294308 B1 EP 0294308B1
Authority
EP
European Patent Office
Prior art keywords
central
disc
hub
orifice
blades
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
Application number
EP88500056A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0294308A1 (en
Inventor
Jose Pages Pages
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bombas Electricas SA BOELSA
Original Assignee
Bombas Electricas SA BOELSA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bombas Electricas SA BOELSA filed Critical Bombas Electricas SA BOELSA
Priority to AT88500056T priority Critical patent/ATE79928T1/de
Publication of EP0294308A1 publication Critical patent/EP0294308A1/en
Application granted granted Critical
Publication of EP0294308B1 publication Critical patent/EP0294308B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Definitions

  • This invention relates to a bladed impellor for centrifugal pumps, of the type formed by two coaxial superimposed discs of equal diameter, between which there is regularly arranged a plurality of blades, the liquid entering axially to said blades and then being discharged by centrifugal force between the edges of the discs.
  • the impellor of the invention is characterized in that one of the discs is provided with a large axial orifice and bears the said blades fixedly attached to the inner surface thereof, while the other disc is provided with a central injection moulded hub of a substantially rigid material, provided with a central tubular orifice, coaxial with that of the first disc, but of smaller diameter and provided internally with a key adapted to engage a key slot of the drive shaft, the disc bearing the hub being also provided previously with a central orifice and several smaller orifices around the central one, the injection moulded material of the hub passing through said smaller orifices after being injected.
  • the impellor may be seen to comprise two coaxial superimposed discs 1 and 2 of like diameter, between which a plurality of blades 3 are regularly disposed.
  • the liquid flows in axially to said blades through a large orifice 5 in the disc 1 and is then discharged by centrifugal force between the edges of the discs 1 and 2, through the openings 4.
  • the disc 1, apart from the said central orifice 5, is provided with the blades 3, fixedly attached to the inner surface thereof.
  • the disc 2 is provided with a central injection moulded hub 6, of a substantially rigid material, provided with a central tubular orifice 7 coaxial with the orifice 5 but having a smaller diameter than the latter.
  • the hub 6 is provided internally with a key 8 adapted to engage a key slot of the drive shaft, not shown.
  • the disc 2 is provided initially with a central orifice 9, corresponding to the orifice 7 of the hub 6 and several smaller orifices 10 around the central one 9, so that the injection moulded material of the hub 6 is disposed through said smaller orifices 10 after being injected, as may be seen in Fig. 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP88500056A 1987-06-05 1988-06-03 Bladed impellor for centrifugal pumps Expired - Lifetime EP0294308B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88500056T ATE79928T1 (de) 1987-06-05 1988-06-03 Kreiselpumpenschaufelrad.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES19878702114U ES1002716Y (es) 1987-06-05 1987-06-05 Turbina con alabes para bomba centrifuga
ES8702114U 1987-06-05

Publications (2)

Publication Number Publication Date
EP0294308A1 EP0294308A1 (en) 1988-12-07
EP0294308B1 true EP0294308B1 (en) 1992-08-26

Family

ID=8251811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88500056A Expired - Lifetime EP0294308B1 (en) 1987-06-05 1988-06-03 Bladed impellor for centrifugal pumps

Country Status (5)

Country Link
EP (1) EP0294308B1 (enrdf_load_stackoverflow)
AT (1) ATE79928T1 (enrdf_load_stackoverflow)
DE (1) DE3874000T2 (enrdf_load_stackoverflow)
ES (1) ES1002716Y (enrdf_load_stackoverflow)
GR (1) GR3006308T3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000057064A1 (en) * 1999-03-23 2000-09-28 Türk Elektri̇k Endüstri̇si̇ A.Ş. Insulated fan
CN102116312B (zh) * 2011-03-09 2012-10-17 浙江新界泵业股份有限公司 用于离心泵的叶轮

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2844100A (en) * 1954-07-06 1958-07-22 Kurt J Heinicke Sheet metal centrifugal pump
US3070026A (en) * 1958-12-03 1962-12-25 Tait Mfg Co The Pumps
CH416921A (de) * 1964-07-07 1966-07-15 Patege Ag Metallenes Lüfterrad
NL6710533A (enrdf_load_stackoverflow) * 1967-07-29 1969-01-31
DE2126087A1 (de) * 1971-05-26 1972-12-07 Engelbrecht & Lemmerbrock Radialgebläse mit Nabe für die Tragböden der Gebläseflügel

Also Published As

Publication number Publication date
ATE79928T1 (de) 1992-09-15
ES1002716U (es) 1988-06-16
DE3874000T2 (de) 1993-01-14
ES1002716Y (es) 1989-02-01
EP0294308A1 (en) 1988-12-07
GR3006308T3 (enrdf_load_stackoverflow) 1993-06-21
DE3874000D1 (de) 1992-10-01

Similar Documents

Publication Publication Date Title
EP0854294B1 (de) Laufrad einer Kreiselpumpe
US3175757A (en) Rotor construction
CA2070188A1 (en) Wheel lock, centering and drive means and turbocharger impeller combination
BR8702861A (pt) Tachao para calcados e processo de fabricar um tachao
SE9500791L (sv) Skivstapel av separationsskivor för centrifugalseparator
TW348174B (en) Fiber manufacturing spinner and fiberizer
EP0294308B1 (en) Bladed impellor for centrifugal pumps
DE3868643D1 (de) Kreiselpumpenlaufrad.
US6976828B2 (en) Centrifugal wheel
JPS62243998A (ja) ラジアルポンプ用のロ−タ
GB1190293A (en) Method of Making a Bladed Rotor
US3811978A (en) Method of forming centrifugal blower wheel
GB876618A (en) Improvements relating to cylindrical bladed rotors for flow machines
US2144860A (en) Fan
US4150582A (en) Rotor ring for inertial energy storage rotor
DE2930257C3 (de) Verfahren zum Herstellen der Tragscheibe eines Kreisel-Gebläselaufrades
FR2401024A1 (fr) Procede de fabrication d'un disque porte-caracteres de machine imprimante et disque porte-caracteres obtenu par la mise en oeuvre de ce procede
US4893947A (en) Spinning machine rotor shaft disk
EP0305776B1 (de) Heizungswasserumwälzpumpe
WO2000073661A1 (en) Turbo fan
IE853239L (en) A centrifuge rotor having a flexible carrier with restoring¹cap assemblys
US2989285A (en) Rotor construction
DE1286350B (de) Fluessigkeitsreibungskupplung
DE69733790T2 (de) Abdichtungsvorrichtung für Nass- und Trockensaugmaschinen
US4609296A (en) Character-carrying disc for a printing machine

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 DE FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890524

17Q First examination report despatched

Effective date: 19910103

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 DE FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 79928

Country of ref document: AT

Date of ref document: 19920915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3874000

Country of ref document: DE

Date of ref document: 19921001

ITF It: translation for a ep patent filed
ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930429

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930430

Year of fee payment: 6

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3006308

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930507

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930514

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19930518

Year of fee payment: 6

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

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19930628

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930630

Year of fee payment: 6

Ref country code: AT

Payment date: 19930630

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930702

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930805

Year of fee payment: 6

26N No opposition filed
EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940603

Ref country code: GB

Effective date: 19940603

Ref country code: AT

Effective date: 19940603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940604

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940630

Ref country code: CH

Effective date: 19940630

Ref country code: BE

Effective date: 19940630

BERE Be: lapsed

Owner name: S.A. BOMBAS ELECTRICAS BOELSA

Effective date: 19940630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19941231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950101

EUG Se: european patent has lapsed

Ref document number: 88500056.2

Effective date: 19950110

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940603

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950301

EUG Se: european patent has lapsed

Ref document number: 88500056.2

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3006308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050603