IT209616Z2 - HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS. - Google Patents

HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS.

Info

Publication number
IT209616Z2
IT209616Z2 IT8630733U IT3073386U IT209616Z2 IT 209616 Z2 IT209616 Z2 IT 209616Z2 IT 8630733 U IT8630733 U IT 8630733U IT 3073386 U IT3073386 U IT 3073386U IT 209616 Z2 IT209616 Z2 IT 209616Z2
Authority
IT
Italy
Prior art keywords
impeller
ring
inlet
liquid
face
Prior art date
Application number
IT8630733U
Other languages
Italian (it)
Other versions
IT8630733V0 (en
Original Assignee
Lowara 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 Lowara Spa filed Critical Lowara Spa
Priority to IT8630733U priority Critical patent/IT209616Z2/en
Publication of IT8630733V0 publication Critical patent/IT8630733V0/en
Priority to EP87111178A priority patent/EP0257358B1/en
Priority to AT87111178T priority patent/ATE65116T1/en
Priority to DE8787111178T priority patent/DE3771284D1/en
Application granted granted Critical
Publication of IT209616Z2 publication Critical patent/IT209616Z2/en

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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Mechanical Sealing (AREA)

Abstract

The hydraulic sealing ring (1) on the inlet (5) of the impeller (6), particularly for single-stage and multistage pumps is made in a rubber-like material the inner face (3) whereof couples to the outer surface (4) of the inlet (5) of an impeller (6). The ring (1) has substantially radial openings which connect a shimming face to the outer one to allow a slight injection of liquid bled from the higher-pressure chamber in output from the impeller blades in the shimming region and to allow the creation and the maintainance of an extremely thin layer of liquid adapted to ensure a lubrication of the scraping surfaces with a reduced leakage towards the lower-pressure region at the input of the impeller (6) and to counterbalance the radial force which tends to press the ring around the inlet (5) of the impeller (6), said force being generated by the pressure of the liquid acting on the outer face (4) of said ring.
IT8630733U 1986-08-08 1986-08-08 HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS. IT209616Z2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
IT8630733U IT209616Z2 (en) 1986-08-08 1986-08-08 HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS.
EP87111178A EP0257358B1 (en) 1986-08-08 1987-08-01 Hydraulic sealing ring on the inlet of the impeller in single-stage and multistage pumps
AT87111178T ATE65116T1 (en) 1986-08-08 1987-08-01 HYDRAULIC SEAL FOR IMPELLER INLET OF SINGLE AND MULTISTAGE PUMPS.
DE8787111178T DE3771284D1 (en) 1986-08-08 1987-08-01 HYDRAULIC SEALING RING FOR THE WHEEL INLET OF SINGLE AND MULTI-STAGE PUMPS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8630733U IT209616Z2 (en) 1986-08-08 1986-08-08 HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS.

Publications (2)

Publication Number Publication Date
IT8630733V0 IT8630733V0 (en) 1986-08-08
IT209616Z2 true IT209616Z2 (en) 1988-10-24

Family

ID=11231522

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8630733U IT209616Z2 (en) 1986-08-08 1986-08-08 HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS.

Country Status (4)

Country Link
EP (1) EP0257358B1 (en)
AT (1) ATE65116T1 (en)
DE (1) DE3771284D1 (en)
IT (1) IT209616Z2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939156C2 (en) * 1989-11-27 1994-01-27 Grundfos International A S Bje Compound impeller for a centrifugal pump
DE4330098A1 (en) * 1993-09-06 1995-03-09 Klein Schanzlin & Becker Ag Guide device designed as a molded sheet metal part
DE19607292C2 (en) * 1996-02-27 2000-06-08 Grundfos A S Bjerringbro Housing with guide device for one pump stage of a multi-stage centrifugal pump
DE10260443A1 (en) * 2002-12-21 2004-07-01 Ksb Aktiengesellschaft Housing for multi-stage rotary pump is fabricated from sheet metal and has impeller wheel separated from the housing walls by a seal
GB0412231D0 (en) * 2004-06-02 2004-07-07 Weir Pumps Ltd Mechanical assembly and deformable element therefor
EP2148096B1 (en) * 2008-07-25 2013-04-10 Grundfos Management A/S Centrifugal pump
IT1398921B1 (en) 2010-03-25 2013-03-28 Caprari Spa CENTRIFUGAL PUMP.
EP3181909B1 (en) 2015-12-14 2020-04-08 Wilo Se Compact sealing ring unit
EP3460253A1 (en) * 2017-09-26 2019-03-27 Xylem IP Management S.à.r.l. Pump with a wear ring

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1839514A (en) * 1929-01-23 1932-01-05 Pacific Pump Works Device for preventing short circuiting flow around impellers
US2644403A (en) * 1952-03-05 1953-07-07 Ingersoll Rand Co Device for preventing clogging in centrifugal pumps
SE396454C (en) * 1974-04-30 1978-01-09 Asea Ab HIGH PRESSURE PRESS
DE3207327A1 (en) * 1982-03-01 1983-09-08 Heinz Konrad Prof. Dr.-Ing. 7050 Waiblingen Müller Shaft seal
IT1180991B (en) * 1984-06-07 1987-09-23 Lowara Spa SEALING DEVICE INTERPOSED BETWEEN IMPELLER AND PUMP BODY

Also Published As

Publication number Publication date
DE3771284D1 (en) 1991-08-14
IT8630733V0 (en) 1986-08-08
ATE65116T1 (en) 1991-07-15
EP0257358B1 (en) 1991-07-10
EP0257358A3 (en) 1988-11-09
EP0257358A2 (en) 1988-03-02

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