EP0672832B1 - Dichtungsvorrichtung für Pumpenlaufrad - Google Patents

Dichtungsvorrichtung für Pumpenlaufrad Download PDF

Info

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
Application number
EP19950850055
Other languages
English (en)
French (fr)
Other versions
EP0672832A1 (de
Inventor
Ulf Arbeus
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
ITT 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 ITT Flygt AB filed Critical ITT Flygt AB
Publication of EP0672832A1 publication Critical patent/EP0672832A1/de
Application granted granted Critical
Publication of EP0672832B1 publication Critical patent/EP0672832B1/de
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

  • 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)

Claims (1)

  1. Pumpe mit einer Einrichtung zum Verringern des Rückstroms durch den Schlitz zwischen einem Pumpengehäuseeinsatz (5) und einem Pumpenrad (1), wo der Einlaß (2) des Pumpenrads (1) mit einem axial gerichteten Schlitz zwischen dem sich drehenden Pumpenradeinlaß und dem nicht drehenden Pumpengehäuseeinlaß (5) ausgebildet ist,
    dadurch gekennzeichnet,
    daß das Pumpenrad (1) mit einem axial gerichteten ersten Kragen (2) ausgebildet ist, der einen ähnlich ausgebildeten zweiten Kragen (5) koaxial umgibt, der gegenüberliegend dem ersten Kragen (2) ausgebildet ist und einen Teil des Pumpengehäuses (3) bildet, und daß der axial gerichtete Schlitz (8) zwischen dem sich drehenden Pumpenradeinlaß (2) und dem nicht drehenden Pumpengehäuseeinlaß (5) in das Pumpenrad (1) führt und von einem nicht drehenden O-Ring abgedichtet wird. der an einem Ende des Schlitzes angeordnet ist, wobei dieses Ende dasjenige ist, welches von dem Pumpenrad fortweist.
EP19950850055 1994-03-16 1995-03-13 Dichtungsvorrichtung für Pumpenlaufrad Expired - Lifetime EP0672832B1 (de)

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 (de) 1995-09-20
EP0672832B1 true EP0672832B1 (de) 1998-05-20

Family

ID=20393295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950850055 Expired - Lifetime EP0672832B1 (de) 1994-03-16 1995-03-13 Dichtungsvorrichtung für Pumpenlaufrad

Country Status (5)

Country Link
EP (1) EP0672832B1 (de)
JP (1) JPH08121384A (de)
CA (1) CA2144692C (de)
DE (1) DE69502525T2 (de)
SE (1) SE502552C2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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 (de) 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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