EP1164296A3 - Multistage pump - Google Patents

Multistage pump Download PDF

Info

Publication number
EP1164296A3
EP1164296A3 EP01113613A EP01113613A EP1164296A3 EP 1164296 A3 EP1164296 A3 EP 1164296A3 EP 01113613 A EP01113613 A EP 01113613A EP 01113613 A EP01113613 A EP 01113613A EP 1164296 A3 EP1164296 A3 EP 1164296A3
Authority
EP
European Patent Office
Prior art keywords
diffusers
tubular body
closure assembly
diffuser casing
impellers
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.)
Withdrawn
Application number
EP01113613A
Other languages
German (de)
French (fr)
Other versions
EP1164296A2 (en
Inventor
Hem Sudhana
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.)
DAB Pumps SpA
Original Assignee
DAB Pumps SpA
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 DAB Pumps SpA filed Critical DAB Pumps SpA
Publication of EP1164296A2 publication Critical patent/EP1164296A2/en
Publication of EP1164296A3 publication Critical patent/EP1164296A3/en
Withdrawn legal-status Critical Current

Links

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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Fertilizing (AREA)

Abstract

A multistage pump (10) comprising, in a tubular body (11), a plurality of diffusers (12) which are alternated with impellers (13), the diffusers (12) being stacked peripherally so as to form a diffuser casing (14), the impellers (13) being keyed on a shaft (15) arranged on the axis (16), a closure assembly (18) being associated with the tubular body (11) at the intake region (17) so as to lock the diffusers in the packed configuration. The pump (10) comprises two annular elements (22, 23) which are interposed between the closure assembly (18) associated with the tubular body (11) and the corresponding head (21) of the diffuser casing (14), the mutually facing surfaces of the annular elements being shaped so as to form a contact with three degrees of freedom of rotation so as to allow adaptation with correction of any errors of co-planarity in the locking on the part of the closure assembly (18) on the head (21) of the diffuser casing (14).
EP01113613A 2000-06-15 2001-06-15 Multistage pump Withdrawn EP1164296A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD000163 2000-06-15
IT2000PD000163A IT1315710B1 (en) 2000-06-15 2000-06-15 MULTI-STAGE PUMP STRUCTURE.

Publications (2)

Publication Number Publication Date
EP1164296A2 EP1164296A2 (en) 2001-12-19
EP1164296A3 true EP1164296A3 (en) 2003-03-19

Family

ID=11452011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113613A Withdrawn EP1164296A3 (en) 2000-06-15 2001-06-15 Multistage pump

Country Status (2)

Country Link
EP (1) EP1164296A3 (en)
IT (1) IT1315710B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014156070A1 (en) * 2013-03-27 2014-10-02 パナソニック株式会社 Centrifugal blower
CN112901511B (en) * 2021-01-29 2022-08-09 绍兴市雪花机电有限公司 Variable frequency pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2017544A (en) * 1935-08-07 1935-10-15 Ingersoll Rand Co Sealing device for centrifugal pumps
US4244675A (en) * 1979-04-30 1981-01-13 Worthington Pump, Inc. Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies
RU2076957C1 (en) * 1994-08-09 1997-04-10 Яков Львович Любин Multi-stage centrifugal pump
RU2136968C1 (en) * 1998-06-30 1999-09-10 Акционерное общество "Татнефть" Horizontal multistage centrifugal pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2017544A (en) * 1935-08-07 1935-10-15 Ingersoll Rand Co Sealing device for centrifugal pumps
US4244675A (en) * 1979-04-30 1981-01-13 Worthington Pump, Inc. Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies
RU2076957C1 (en) * 1994-08-09 1997-04-10 Яков Львович Любин Multi-stage centrifugal pump
RU2136968C1 (en) * 1998-06-30 1999-09-10 Акционерное общество "Татнефть" Horizontal multistage centrifugal pump

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 1997-478584, XP002227653 *
DATABASE WPI Derwent World Patents Index; AN 2000-420975, XP002227652 *

Also Published As

Publication number Publication date
ITPD20000163A1 (en) 2001-12-15
EP1164296A2 (en) 2001-12-19
ITPD20000163A0 (en) 2000-06-15
IT1315710B1 (en) 2003-03-18

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