EP0294308B1 - Bladed impellor for centrifugal pumps - Google Patents

Bladed impellor for centrifugal pumps Download PDF

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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)
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/en
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

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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)

Abstract

Bladed impellor for centrifugal pumps, of the type formed by two coaxial superimposed discs (1, 2) of like diameter between which there is regularly disposed a plurality of blades (3), characterized in that one of the discs (1, 2) is provided with a large axial orifice (5) and bears the said blades (3) fixedly attached to the inner surface thereof, while the other disc is provided with a central injection moulded hub (6) of a substantially rigid material, provided with a central tubular orifice (7). The disc bearing the hub (6) is provided previously with a central orifice (9) and several smaller orifices (10) around the central one (9), the injection moulded material of the hub (6) passing through said smaller orifices (10) after being injected.

Description

  • 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.
  • Very many embodiments of bladed impellors for centrifugal pumps are already known, outstanding among which are those described in Spanish utility models No. 205.690 and 282.527, both in the name of the present applicant, with all of them having a serious drawback, consisting in that the central orifice of the impellor must carry a key for drive purposes, representing either an assembly operation or a machining operation, making the impellor substantially more expensive.
  • To cheapen the cost of the impellor and make its manufacture more profitable, 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 accompanying drawings illustrate one embodiment of the impellor of the present invention as a non-limitative example.
    • Figs. 1 and 2 are respective plan and sectional elevation views, respectively, of the first disc;
    • Figs. 3 and 4 are respective views also in plan and sectional elevation, respectively, of the second disc of the impellor according to the invention;
    • Figs. 5 and 6 illustrate two views also in plan and in sectional elevation, respectively, of the assembled impellor; and
    • Fig. 7 is a plan view of the second disc before injection moulding of the hub.
  • In the drawings, 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.
  • In turn, 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.

Claims (1)

  1. Bladed impellor for centrifugal pumps, of the type formed by two coaxial superimposed discs of like diameter between which there is regularly disposed a plurality of blades, the liquid flowing in axially to said blades and being discharged thereafter by centrifugal force between the edges of the disc, 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.
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 (en) 1987-06-05 1988-06-03 CENTRIFUGAL PUMP IMPELLER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES19878702114U ES1002716Y (en) 1987-06-05 1987-06-05 TURBINE WITH BLADES FOR CENTRIFUGAL PUMP
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 (en)
AT (1) ATE79928T1 (en)
DE (1) DE3874000T2 (en)
ES (1) ES1002716Y (en)
GR (1) GR3006308T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3352599A (en) * 1999-03-23 2000-10-09 Turk Elektrik Endustrisi A.S. Insulated fan
CN102116312B (en) * 2011-03-09 2012-10-17 浙江新界泵业股份有限公司 Impeller for centrifugal pump

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 (en) * 1964-07-07 1966-07-15 Patege Ag Metal fan wheel
NL6710533A (en) * 1967-07-29 1969-01-31
DE2126087A1 (en) * 1971-05-26 1972-12-07 Engelbrecht & Lemmerbrock Radial fan with hub for the support floors of the fan blades

Also Published As

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

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