SE502552C2 - sealing device - Google Patents
sealing deviceInfo
- Publication number
- SE502552C2 SE502552C2 SE9400881A SE9400881A SE502552C2 SE 502552 C2 SE502552 C2 SE 502552C2 SE 9400881 A SE9400881 A SE 9400881A SE 9400881 A SE9400881 A SE 9400881A SE 502552 C2 SE502552 C2 SE 502552C2
- Authority
- SE
- Sweden
- Prior art keywords
- inlet
- impeller
- pump housing
- pump
- ring
- Prior art date
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)
Abstract
Description
502 552 2 beror pà de dynamiska krafter som förorsakas av att 0-ringen är medroterande. 502 552 2 depends on the dynamic forces caused by the 0-ring co-rotating.
Ytterligare sätt att angripa problemet visas i EP-492603 samt US 3228342 och 3221661. Här utformas pumpinloppet sà att uppkommande läckflöden omlänkas i en riktning som skall minska störningen i in- flödet.Further ways of tackling the problem are shown in EP-492603 and US 3228342 and 3221661. Here the pump inlet is designed so that emerging leakage flows are redirected in a direction which is to reduce the disturbance in the inflow.
Enligt uppfinningen àstadkoms en tillförlitlig och slitstark anord- ning för att minimera läckflödet i pumpinloppet och samtidigt minska risken för virvelbildningar i inflödet med hjälp av den anordning som anges i efterföljande patentkrav. Anordningen beskrivs närmare nedan under hänvisning till bifogade figurer där figur 1 visar ett snitt genom en del av ett pumphus och pumphjul, medan fig 2 visar en för- storing av en central del.According to the invention, a reliable and durable device is provided for minimizing the leakage flow in the pump inlet and at the same time reducing the risk of vortex formations in the inflow by means of the device specified in the following claims. The device is described in more detail below with reference to the accompanying figures, where figure 1 shows a section through a part of a pump housing and impeller, while figure 2 shows an enlargement of a central part.
I figurerna betecknar 1 ett pumphjul med en inloppsdel eller hals 2. 3 betecknar ett pumphus med en botten 4 och en kragformig inloppsdel 5. 6 betecknar en slitring. 7 en O-ring och 8 en spalt.In the figures, 1 denotes an impeller with an inlet part or neck 2. 3 denotes a pump housing with a bottom 4 and a collar-shaped inlet part 5. 6 denotes a wear ring. 7 an O-ring and 8 a gap.
Den pumpade vätskan sugs in i axiell riktning genom pumphjulets cen- trala öppning och lämnar hjulet vid dess periferi. För att pumphjulet skall kunna rotera fritt, krävs en viss spalt mellan dess inloppsdel och pumphusets inloppsdel. Samtidigt föreligger en strävan att göra spalten sà smal som möjligt för att minimera àterströmningen fràn pumphusets inre förorsakad av tryckskillnader mellan detta och omgiv- ningen.The pumped liquid is sucked in the axial direction through the central opening of the impeller and leaves the wheel at its periphery. In order for the impeller to be able to rotate freely, a certain gap is required between its inlet part and the inlet part of the pump housing. At the same time, there is an effort to make the gap as narrow as possible to minimize the backflow from the interior of the pump housing caused by pressure differences between it and the environment.
Enligt uppfinningen utformas pumphjulets 1 inloppsdel 2 med en kon- centrisk krage som med spel omsluter en likaledes kragformad del 5 pà pumphusets 3 inlopp. Delen 5 är därvid motriktad kragen 2 och sträck- er sig sålunda in ett stycke i denna.According to the invention, the inlet part 2 of the impeller 1 is formed with a concentric collar which playfully encloses a similarly collar-shaped part 5 on the inlet of the impeller housing 3. The part 5 is then opposite the collar 2 and thus extends a piece therein.
Den läckström som med nödvändighet uppkommer, omlänkas därigenom sà att den kommer in i det närmaste parallellt med huvudströmmen in i pumphjulet, varigenom den störning som uppkommer i huvudströmmen blir minimal. 502 552 3 För att ytterligare minska läckströmmen och samtidigt minska risken för igensättning vid pumpning av förorenade vätskor, anordnas en sta- tionär O-ring 7 som täcker ingången till spalten 8 mellan delarna 2 och 5. O-ringen fästs därvid pà den inre, icke roterande delen 5.The leakage current which necessarily arises is thereby redirected so that it enters approximately parallel to the main current into the impeller, whereby the disturbance which arises in the main current becomes minimal. 502 552 3 In order to further reduce the leakage current and at the same time reduce the risk of clogging when pumping contaminated liquids, a stationary O-ring 7 is arranged which covers the entrance to the gap 8 between the parts 2 and 5. The O-ring is attached to the inner, non-rotating part 5.
Det är viktigt att de två delarna 2 och 5 överlappar varandra en viss sträcka för att ett gott resultat skall erhållas.It is important that the two parts 2 and 5 overlap each other a certain distance in order to obtain a good result.
För att minska risken för slitage av inloppet 2 inom området för spalten 8, förses hjulet med en ring 6 av speciellt slitstarkt mate- rial mot vilken O-ringen 7 glider.To reduce the risk of wear of the inlet 2 within the area of the gap 8, the wheel is provided with a ring 6 of particularly durable material against which the O-ring 7 slides.
Claims (1)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9400881A SE502552C2 (en) | 1994-03-16 | 1994-03-16 | sealing device |
EP19950850055 EP0672832B1 (en) | 1994-03-16 | 1995-03-13 | Sealing device for pump impeller |
DE1995602525 DE69502525T2 (en) | 1994-03-16 | 1995-03-13 | Sealing device for pump impeller |
JP5592495A JPH08121384A (en) | 1994-03-16 | 1995-03-15 | Reducing device for back flow |
CA 2144692 CA2144692C (en) | 1994-03-16 | 1995-03-15 | Sealing device for pump impeller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9400881A SE502552C2 (en) | 1994-03-16 | 1994-03-16 | sealing device |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9400881D0 SE9400881D0 (en) | 1994-03-16 |
SE9400881L SE9400881L (en) | 1995-09-17 |
SE502552C2 true SE502552C2 (en) | 1995-11-13 |
Family
ID=20393295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9400881A SE502552C2 (en) | 1994-03-16 | 1994-03-16 | sealing device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0672832B1 (en) |
JP (1) | JPH08121384A (en) |
CA (1) | CA2144692C (en) |
DE (1) | DE69502525T2 (en) |
SE (1) | SE502552C2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19613486C2 (en) * | 1996-04-04 | 1998-12-24 | Grundfos As | Formation of seals for centrifugal pumps to reduce the gap leakage current in the suction mouth area of the pump impeller |
DE102006024997A1 (en) * | 2006-05-30 | 2007-12-06 | Wilo Ag | rotary pump |
JP2008050958A (en) * | 2006-08-23 | 2008-03-06 | Iwaki Co Ltd | Self-priming pump |
FR2911166B1 (en) * | 2007-01-09 | 2012-08-03 | Siebec Soc | PUMP WITH MAGNETIC DRIVE AND SLIDING SEAL |
JP5046767B2 (en) * | 2007-07-19 | 2012-10-10 | 日立アプライアンス株式会社 | Electric blower and vacuum cleaner provided with the same |
CN104235070A (en) * | 2013-06-13 | 2014-12-24 | 德昌电机(深圳)有限公司 | Pump case and pump with same |
CN107917100B (en) * | 2017-10-26 | 2019-03-26 | 珠海格力电器股份有限公司 | Connection structure and air conditioner of water conservancy diversion circle and fan impeller front bezel |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221661A (en) | 1961-12-18 | 1965-12-07 | Electronic Specialty Co | Low-suction head pumps |
US3228343A (en) | 1964-05-25 | 1966-01-11 | U S Pumps Inc | Self-priming pump |
US3741679A (en) * | 1971-09-17 | 1973-06-26 | Blue Co John | Centrifugal pump |
IT1180991B (en) * | 1984-06-07 | 1987-09-23 | Lowara Spa | SEALING DEVICE INTERPOSED BETWEEN IMPELLER AND PUMP BODY |
SU1370318A1 (en) * | 1986-06-06 | 1988-01-30 | Всесоюзный Научно-Исследовательский Институт Горной Механики Им.М.М.Федорова | Packing of pump impeller |
US5295786A (en) | 1990-12-27 | 1994-03-22 | Ebara Corporation | Liner ring for a pump |
US5129795A (en) * | 1991-05-31 | 1992-07-14 | Powerdyne Corporation | Motor driven pump |
-
1994
- 1994-03-16 SE SE9400881A patent/SE502552C2/en not_active IP Right Cessation
-
1995
- 1995-03-13 DE DE1995602525 patent/DE69502525T2/en not_active Expired - Fee Related
- 1995-03-13 EP EP19950850055 patent/EP0672832B1/en not_active Expired - Lifetime
- 1995-03-15 CA CA 2144692 patent/CA2144692C/en not_active Expired - Fee Related
- 1995-03-15 JP JP5592495A patent/JPH08121384A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH08121384A (en) | 1996-05-14 |
SE9400881L (en) | 1995-09-17 |
CA2144692A1 (en) | 1995-09-17 |
EP0672832A1 (en) | 1995-09-20 |
EP0672832B1 (en) | 1998-05-20 |
DE69502525T2 (en) | 1998-09-17 |
DE69502525D1 (en) | 1998-06-25 |
CA2144692C (en) | 2000-03-07 |
SE9400881D0 (en) | 1994-03-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |