EP0672832B1 - Sealing device for pump impeller - Google Patents
Sealing device for pump impeller Download PDFInfo
- Publication number
- EP0672832B1 EP0672832B1 EP19950850055 EP95850055A EP0672832B1 EP 0672832 B1 EP0672832 B1 EP 0672832B1 EP 19950850055 EP19950850055 EP 19950850055 EP 95850055 A EP95850055 A EP 95850055A EP 0672832 B1 EP0672832 B1 EP 0672832B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- inlet
- pump
- rotating
- slot
- 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
Links
Images
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
- the invention concerns a pump including a seal device for sealing between a pump impeller and an adjacent non-rotating part.
- Another way to solve the problem is to arrange a co-rotating O-ring on the impeller inlet part which is influenced by the pressure to glide against the non-rotating surface, the latter then being made of a different material.
- a relatively good seal is obtained in this way, but one disadvantage is that the wear may be extensive causing short service intervals. It has also been noted that the O-ring has a tendency to loose its contact. If this occurs, the self-balancing ends and the seal does not function. This depends on the fact that dynamic forces caused by the O-ring are co-rotating.
- a secure and wear resistant device is obtained which minimizes the leakage flow within the pump inlet and which simultaneously decreases the risk for turbulence within the in flow.
- the device is described more closely below with reference to the enclosed drawings where Fig 1 shows a cut through a part of a pump housing and impeller, while Fig 2 shows an enlarged view of a central part.
- FIG. 1 stands for a pump impeller having an inlet part 2.
- 3 stands for a pump housing with a bottom 4 and a collar formed inlet part 5.
- 6 stands for a wear ring, 7 an O-ring and 8 a slot.
- the pumped liquid is sucked in an axial direction into the centrally located opening of the impeller and leaves the impeller at its circumference.
- a slot having a certain width must be present between the impeller and the inlet part of the pump housing.
- the inlet part 2 of the impeller I is provided with a concentric collar which surrounds a similarly collar formed part 5 at the inlet of the pump housing 3 with a play.
- the part 5 is then directed opposite the collar 2 and extends somewhat into this.
- a stationary 0-ring 7 is arranged to cover the entrance to the slot 8 between the parts 2 and 5. The 0-ring is then attached to the inner non-rotating part 5.
- the impeller is provided with a ring 6 of a wear resistant material on which the O-ring 7 glides.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9400881 | 1994-03-16 | ||
SE9400881A SE502552C2 (sv) | 1994-03-16 | 1994-03-16 | Tätningsanordning |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0672832A1 EP0672832A1 (en) | 1995-09-20 |
EP0672832B1 true EP0672832B1 (en) | 1998-05-20 |
Family
ID=20393295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950850055 Expired - Lifetime EP0672832B1 (en) | 1994-03-16 | 1995-03-13 | Sealing device for pump impeller |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0672832B1 (ja) |
JP (1) | JPH08121384A (ja) |
CA (1) | CA2144692C (ja) |
DE (1) | DE69502525T2 (ja) |
SE (1) | SE502552C2 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19613486C2 (de) * | 1996-04-04 | 1998-12-24 | Grundfos As | Dichtungsausbildung für Kreiselpumpen zur Verminderung des Spaltverluststromes im Saugmundbereich des Pumpenlaufrades |
DE102006024997A1 (de) * | 2006-05-30 | 2007-12-06 | Wilo Ag | Kreiselpumpe |
JP2008050958A (ja) * | 2006-08-23 | 2008-03-06 | Iwaki Co Ltd | 自吸式ポンプ |
FR2911166B1 (fr) * | 2007-01-09 | 2012-08-03 | Siebec Soc | Pompe a entrainement magnetique et etancheite coulissante |
JP5046767B2 (ja) * | 2007-07-19 | 2012-10-10 | 日立アプライアンス株式会社 | 電動送風機及びそれを備えた電気掃除機 |
CN104235070A (zh) * | 2013-06-13 | 2014-12-24 | 德昌电机(深圳)有限公司 | 泵壳及具有该泵壳的泵 |
CN107917100B (zh) * | 2017-10-26 | 2019-03-26 | 珠海格力电器股份有限公司 | 导流圈与风机叶轮前盘的连接结构及空调 |
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 (it) * | 1984-06-07 | 1987-09-23 | Lowara Spa | Dispositivo di tenuta interposto tra girante e corpo pompa |
SU1370318A1 (ru) * | 1986-06-06 | 1988-01-30 | Всесоюзный Научно-Исследовательский Институт Горной Механики Им.М.М.Федорова | Уплотнение рабочего колеса насоса |
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/sv not_active IP Right Cessation
-
1995
- 1995-03-13 DE DE1995602525 patent/DE69502525T2/de 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/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
SE502552C2 (sv) | 1995-11-13 |
JPH08121384A (ja) | 1996-05-14 |
SE9400881L (sv) | 1995-09-17 |
CA2144692A1 (en) | 1995-09-17 |
EP0672832A1 (en) | 1995-09-20 |
DE69502525T2 (de) | 1998-09-17 |
DE69502525D1 (de) | 1998-06-25 |
CA2144692C (en) | 2000-03-07 |
SE9400881D0 (sv) | 1994-03-16 |
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