EP0192621B1 - A seal device - Google Patents

A seal device Download PDF

Info

Publication number
EP0192621B1
EP0192621B1 EP86850033A EP86850033A EP0192621B1 EP 0192621 B1 EP0192621 B1 EP 0192621B1 EP 86850033 A EP86850033 A EP 86850033A EP 86850033 A EP86850033 A EP 86850033A EP 0192621 B1 EP0192621 B1 EP 0192621B1
Authority
EP
European Patent Office
Prior art keywords
ring
seal
slot
impeller
housing
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
EP86850033A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0192621A1 (en
Inventor
Evert Sjöstrand
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.)
Xylem Water Solutions AB
Original Assignee
Flygt AB
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 Flygt AB filed Critical Flygt AB
Publication of EP0192621A1 publication Critical patent/EP0192621A1/en
Application granted granted Critical
Publication of EP0192621B1 publication Critical patent/EP0192621B1/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
    • F04D29/08—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

Definitions

  • This invention concerns a seal device as claimed in claim 1 to prevent leakage between an impeller and a non-rotating part.
  • the purpose of our invention is to replace the wear parts made of rubber by a more resistant material which extends the service intervals.
  • At least one of the seal rings is attached by help of an O-ring.
  • a mechanical seal is thus arranged between the impeller 1 and the housing 2 preventing medium that has passed through the impeller to flow back to the inlet.
  • the mechanical seal which has an radial sealing surface, consists of a seal ring 3 attached to the impeller and another ring 4 attached to the housing.
  • at least one of the rings 3 is attached by an O-ring.
  • a slot 6 is made in the impeller, extending axially along a part of a mantle surface of the impeller. The slot has then such a configuration that it is deeper in the radial direction at some distance from the opening.
  • a sealing is obtained which is very resistant to wear and in addition the 0-ring attachment means that the rings are easy to replace and problems due to the seal rings not being sufficiently plain are eliminated.
  • a specific advantage occurs if the sealing surface has a radial direction. This means that the demands for tolerances decrease as a sufficient sealing is obtained, even if the rings are somewhat displaced relative each other. This quality is especially important if the pump contains several steps, that is to say several continuous impellers on the same shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Mechanical Sealing (AREA)
EP86850033A 1985-02-14 1986-02-04 A seal device Expired - Lifetime EP0192621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8500691A SE459755B (sv) 1985-02-14 1985-02-14 Anordning foer att aastadkommma en avtaetning mellan ett roterbart pumphjul och ett omgivande pumphus
SE8500691 1985-02-14

Publications (2)

Publication Number Publication Date
EP0192621A1 EP0192621A1 (en) 1986-08-27
EP0192621B1 true EP0192621B1 (en) 1990-10-24

Family

ID=20359116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86850033A Expired - Lifetime EP0192621B1 (en) 1985-02-14 1986-02-04 A seal device

Country Status (5)

Country Link
EP (1) EP0192621B1 (enrdf_load_stackoverflow)
JP (1) JPS61192896A (enrdf_load_stackoverflow)
AU (1) AU593534B2 (enrdf_load_stackoverflow)
DE (1) DE3675032D1 (enrdf_load_stackoverflow)
SE (1) SE459755B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9616020D0 (en) * 1996-07-31 1996-09-11 Framo Dev Ltd Dynamic weir ring

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018544A (en) * 1976-02-20 1977-04-19 Hale Fire Pump Company Centrifugal pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE142214C (enrdf_load_stackoverflow) *
US1521226A (en) * 1921-01-28 1924-12-30 Paul G Bogdanoff Centrifugal pump
DE422681C (de) * 1923-03-21 1925-12-09 Edwin Letts Oliver Spaltdichtung fuer Turbinen, Pumpen und aehnliche Kreiselmaschinen
AU476959B2 (en) * 1973-09-18 1976-10-07 Westinghouse Electric Corporation Improvements in or relating to rotating element fluid seal for centrifugal compressor
AU8739075A (en) * 1974-12-24 1977-06-16 Warman Int Ltd Self centring festrictor bush

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018544A (en) * 1976-02-20 1977-04-19 Hale Fire Pump Company Centrifugal pump

Also Published As

Publication number Publication date
SE8500691L (sv) 1986-08-15
AU5292086A (en) 1986-08-21
DE3675032D1 (de) 1990-11-29
JPS61192896A (ja) 1986-08-27
SE8500691D0 (sv) 1985-02-14
JPH0217719B2 (enrdf_load_stackoverflow) 1990-04-23
AU593534B2 (en) 1990-02-15
SE459755B (sv) 1989-07-31
EP0192621A1 (en) 1986-08-27

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