SE459755B - DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE - Google Patents

DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE

Info

Publication number
SE459755B
SE459755B SE8500691A SE8500691A SE459755B SE 459755 B SE459755 B SE 459755B SE 8500691 A SE8500691 A SE 8500691A SE 8500691 A SE8500691 A SE 8500691A SE 459755 B SE459755 B SE 459755B
Authority
SE
Sweden
Prior art keywords
impeller
seal
ring
surrounding
achieve
Prior art date
Application number
SE8500691A
Other languages
Swedish (sv)
Other versions
SE8500691L (en
SE8500691D0 (en
Inventor
E Sjoestrand
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
Priority to SE8500691A priority Critical patent/SE459755B/en
Publication of SE8500691D0 publication Critical patent/SE8500691D0/en
Priority to AU52920/86A priority patent/AU593534B2/en
Priority to EP86850033A priority patent/EP0192621B1/en
Priority to DE8686850033T priority patent/DE3675032D1/en
Priority to JP61029187A priority patent/JPS61192896A/en
Publication of SE8500691L publication Critical patent/SE8500691L/en
Publication of SE459755B publication Critical patent/SE459755B/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

Landscapes

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

Description

_459 755 “n Enligt en föredragen utföringsform av uppfinningen är åt- minstone den ena tätningsringen infäst medelst ett O-ring- förband, vilket medför utbytbarhet och eliminerar risken för oplanhet hos ringen. According to a preferred embodiment of the invention, at least one sealing ring is fastened by means of an O-ring joint, which entails replaceability and eliminates the risk of unplanability of the ring.

'Det senare inträffar lätt om ringen monteras på annat sätt, exempelvis genonxkrympning framför allt vid de stora ringdiametrar det här kan bli fråga om.The latter occurs easily if the ring is mounted in another way, for example genonx shrinkage, especially at the large ring diameters this may be the case.

Uppfinningen beskrivs närmare nedan under hänvisning till bifogade figur.The invention is described in more detail below with reference to the accompanying figure.

I figuren betecknar l ett pumphjul, 2 en pumphusdel, 3 och 4 plantätningsringar, S en O-ring och 6 ett spår för denna.In the figure, 1 denotes an impeller, 2 a pump housing part, 3 and 4 floor sealing rings, S an O-ring and 6 a groove therefor.

Enligt uppfinningen anordnas sålunda en plant ätning 3, 4 mellan pumphjulet l och pumphuset 2 , varigenom det medium som passerat genom pumphjulet hindras från att strömma till- baka mot inloppet.According to the invention, a flat feed 3, 4 is thus arranged between the impeller 1 and the impeller housing 2, whereby the medium which has passed through the impeller is prevented from flowing back towards the inlet.

Plantätningen, som har en axiell tätningsyta, utgörs av en tätningsring 3 infäst i pumphjulet och en tätningsring 4 infäst i pumphuset. För att möjliggöra utbytbarhet infästs åtminstone en av ringarna 3, löstagbart, medelst en O-ring.The floor seal, which has an axial sealing surface, consists of a sealing ring 3 attached to the impeller and a sealing ring 4 attached to the pump housing. To enable interchangeability, at least one of the rings 3, removably, is attached by means of an O-ring.

För detta ändamål utformas ett spår 6 i pumphjulet, vilket spår sträcker sig i axiell riktning längs en del av en man- telyta på hjulet. Spåret är därvid så format att det blir något djupare, radiellt, ett stycke från öppningen.For this purpose, a groove 6 is formed in the impeller, which groove extends in the axial direction along a part of a mantle surface on the wheel. The groove is then shaped so that it becomes slightly deeper, radially, some distance from the opening.

Vid montering av en tätningsring på pumphjulet, läggs först en 0-ring i spåret, varefter tätningsringen pressas ned utan- för O-ringen. Detta medför att O-ringen deformeras och på så sätt låser fast tätningsringen. Tack vare att spåret är grundare vid öppningen, blir låsningen mycket effektiv, ef- tersom O-ringen måste deformeras än mer för att kunna glida ut ur spåret. Detta medför sålunda att låsningen blir starkare ju högre tryck som tätningen utsätts för. Den andra tätnings- ringen 4 kan med fördel monteras på motsvarande sätt. fl n 459 755 Fördelarna med anordningen enligt uppfinningen är sålunda flera. Dels erhålls en tätning med mycket god slitstyrka, del medför 0-ringinfästningen att risk för oplanhet hos ringarna elimineras och slutligen är ringarna lätt utbyt- bara.When mounting a sealing ring on the impeller, first place a 0-ring in the groove, after which the sealing ring is pressed down outside the O-ring. This causes the O-ring to deform and thus locks the sealing ring. Due to the fact that the groove is shallower at the opening, the locking becomes very effective, as the O-ring must be deformed even more to be able to slide out of the groove. This thus means that the locking becomes stronger the higher the pressure to which the seal is subjected. The second sealing ring 4 can advantageously be mounted in a corresponding manner. 459 755 The advantages of the device according to the invention are thus several. On the one hand, a seal with very good wear resistance is obtained, on the other hand, the 0-ring attachment eliminates the risk of flatness of the rings and finally the rings are easily replaceable.

En speciell fördel uppkommer om tätningsytan mellan de två ringarna är radiellt riktad. Detta innebär att toleranskra- ven sjunker, eftersom ett fullgott tätningsresultat erhålls, även om ringarna skulle vara något förskjutna i förhållande till varandra. Denna egenskap är speciellt viktig om pumpen innefattar flera steg, d v s flera efter varandra anordnade pumphjul pa en gemensam axel.A special advantage arises if the sealing surface between the two rings is radially directed. This means that the tolerance requirements decrease, as a satisfactory sealing result is obtained, even if the rings are slightly offset in relation to each other. This property is especially important if the pump comprises several stages, i.e. several impellers arranged one after the other on a common axis.

Claims (1)

1. 459 755 l. Anordning för att åstadkomma en avtätning mellan ett roterbart pumphjul och ett omgivande pumphus, k ä n n e - t e c k n a d därav, att den innefattar en mekanisk plantät- ning med radiellt riktade tätningsytor företrädesvis anord- nad pâ avsevärt avstånd från pumphjulets (1) rotationsaxel och bestående av två tätningsringar (3) och (4), den ena anordnad pà pumphjulet (1), den andra på det omgivande huset (2), varvid minst en av ringarna är infäst medelst en O-ring (S) anordnad i ett spår (6) i pumphjulet (l) alternativt pumphuset (2), vilket spår är djupare i sin inre del än vid mynningen.A device for providing a seal between a rotatable impeller and a surrounding impeller housing, characterized in that it comprises a mechanical floor seal with radially directed sealing surfaces preferably arranged at a considerable distance from the impeller ( 1) axis of rotation and consisting of two sealing rings (3) and (4), one arranged on the impeller (1), the other on the surrounding housing (2), wherein at least one of the rings is attached by means of an O-ring (S) arranged in a groove (6) in the impeller (1) or the pump housing (2), which groove is deeper in its inner part than at the mouth.
SE8500691A 1985-02-14 1985-02-14 DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE SE459755B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE8500691A SE459755B (en) 1985-02-14 1985-02-14 DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE
AU52920/86A AU593534B2 (en) 1985-02-14 1986-02-03 A seal arrangement for a pump
EP86850033A EP0192621B1 (en) 1985-02-14 1986-02-04 A seal device
DE8686850033T DE3675032D1 (en) 1985-02-14 1986-02-04 SEALING SYSTEM.
JP61029187A JPS61192896A (en) 1985-02-14 1986-02-14 Sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8500691A SE459755B (en) 1985-02-14 1985-02-14 DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE

Publications (3)

Publication Number Publication Date
SE8500691D0 SE8500691D0 (en) 1985-02-14
SE8500691L SE8500691L (en) 1986-08-15
SE459755B true SE459755B (en) 1989-07-31

Family

ID=20359116

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8500691A SE459755B (en) 1985-02-14 1985-02-14 DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE

Country Status (5)

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

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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE142214C (en) *
US1521226A (en) * 1921-01-28 1924-12-30 Paul G Bogdanoff Centrifugal pump
DE422681C (en) * 1923-03-21 1925-12-09 Edwin Letts Oliver Gap seal for turbines, pumps and similar centrifugal machines
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
US4018544A (en) * 1976-02-20 1977-04-19 Hale Fire Pump Company Centrifugal pump

Also Published As

Publication number Publication date
AU593534B2 (en) 1990-02-15
EP0192621B1 (en) 1990-10-24
SE8500691L (en) 1986-08-15
AU5292086A (en) 1986-08-21
EP0192621A1 (en) 1986-08-27
DE3675032D1 (en) 1990-11-29
JPS61192896A (en) 1986-08-27
SE8500691D0 (en) 1985-02-14
JPH0217719B2 (en) 1990-04-23

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