EP0561689B1 - Pompes centrifuges - Google Patents

Pompes centrifuges Download PDF

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Publication number
EP0561689B1
EP0561689B1 EP93400667A EP93400667A EP0561689B1 EP 0561689 B1 EP0561689 B1 EP 0561689B1 EP 93400667 A EP93400667 A EP 93400667A EP 93400667 A EP93400667 A EP 93400667A EP 0561689 B1 EP0561689 B1 EP 0561689B1
Authority
EP
European Patent Office
Prior art keywords
chamber
filter
turbine
filter chamber
pump
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
EP93400667A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0561689A1 (fr
Inventor
Laurent Bourdelain
Joel Cousin
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.)
ELECTROMECANIQUE DU NIVERNAIS - SELNI Ste
Original Assignee
ELECTROMECANIQUE DU NIVERNAIS - SELNI Ste
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 ELECTROMECANIQUE DU NIVERNAIS - SELNI Ste filed Critical ELECTROMECANIQUE DU NIVERNAIS - SELNI Ste
Publication of EP0561689A1 publication Critical patent/EP0561689A1/fr
Application granted granted Critical
Publication of EP0561689B1 publication Critical patent/EP0561689B1/fr
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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • 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
    • F04D29/086—Sealings especially adapted for liquid pumps
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the present invention relates to an improvement applying to all types of centrifugal pumps, in particular those provided with a filter.
  • a centrifugal pump serves as a fluid circulation pump, and in particular for draining water. It consists for this of a turbine chamber, an engine compartment, and can be provided upstream of a filter chamber in order to stop, before their arrival in the turbine chamber, the undesirable solid elements carried by the water.
  • the motor driving the turbine can be a synchronous, asynchronous, universal motor or an electric motor of another type. The water is therefore filtered, centrifuged in the turbine chamber and discharged through a discharge pipe.
  • water circulation problems common to all centrifugal pumps arise and are of two types.
  • a patent US-A-3,397,135 issued in the United States shows an assembly of a pump and a filter, which corresponds to the preamble of claim 1.
  • a known solution to overcome these two major drawbacks is to install a pipe with a well-calibrated diameter between the outlet and the inlet of the turbine chamber in order to maintain a permanent circuit of water in the pump, even when it has no more water to drain.
  • This water circuit makes it possible to homogenize the air-water mixture inside the chamber, which allows better evacuation of the air when water reappears at the inlet.
  • This device also makes it possible to damp the oscillatory regime of the residual water column.
  • This solution is already applied to certain washing machines and dishwashers, but is costly in terms of the price of parts (additional pipes, fittings), and the price of installation (mounting pipe which is often manual).
  • the present invention makes it possible to avoid the two drawbacks of poor circulation of water in the turbine chamber (sniffing phenomenon and delay in priming) as well as the drawbacks due to the previous solution by creating a flow leak. well calibrated from the periphery of the turbine chamber to the upstream filter chamber.
  • the water being at high pressure in the periphery of the turbine chamber and at low pressure in the filter chamber, a water flow is established from the periphery of the turbine chamber to the filter chamber.
  • This water is therefore taken up in the turbine chamber through the filter chamber, which makes it possible to homogenize the air-water mixture by establishing a permanent water circuit between the turbine chamber and the filter chamber, even when the pump has no more water to drain; and consequently to reduce the time necessary for the reestablishment of the regime after a new arrival of massive water and also to eliminate the phenomena of sniffing.
  • This solution has multiple advantages including that, important, of a very low cost since it requires only a slight modification of an already existing part (filter, joint or partition separating the two chambers).
  • a centrifugal pump fitted with a filter can include, as in FIG. 1, a filter chamber 1, a filter 2, a partition 3 between the filter chamber 1 and the turbine chamber 4, a turbine 5 and a discharge pipe 6 .
  • the flow of the fluid is represented by the arrows F, F 'and F ".
  • the fluid passes through (F) the filter chamber 1, and the opening 7 in the membrane of the filter 2, is centrifuged (F') on the periphery of the turbine chamber 4 by the rotating turbine 5, and is discharged (F ") by the discharge pipe 6, the inlet of which is located on the periphery of the turbine chamber 4.
  • the central part of the partition between the turbine chamber 4 and the filter chamber 1 is a part 8 of the filter 2 comprising a lip seal 9.
  • this seal lip 9 is preferably made of the same material as the filter 2, such as plastic. It is obvious that any other type of independent seal or integrated into the filter can be used, two of these types of filters being shown in FIGS. 3 and 4.
  • one or more calibrated openings 10 are made at the height of the periphery of the turbine chamber 4. These openings 10 must be calibrated, their sections can for example be equivalent to one tenth of those of the discharge pipe 6, so as not to reduce the pump flow too much, and for this they can be of all shapes. This or these openings 10 are made directly through the partition 3 integrated into the pump body, or through the part 8 of the filter 2 ensuring the separation between the turbine chamber 4 and the filter chamber 1 as it is the case in Figures 1 and 2.
  • the opening (s) 10 are located on the membrane 8 for separating the filter 2, as is the case in FIGS. 1 and 2, it will be characterized by a rupture in the sealing of the membrane 8, produced by a notch 10 of semi-circular, rectangular, or round or any other shape, generally placed around the periphery of the sealing membrane 8.
  • FIG. 2 represents a view along the axis A of FIG. 1 of such an embodiment, in which a single semi-circular opening 10 has been made on the lip of the membrane 8 of the filter 2.
  • the fluid centrifuged on the periphery of the turbine chamber 4 can thus flow into the filter chamber 1 due to the pressure difference and be again attracted towards the center of the turbine 5 where, in the presence of air, it will mix with it, then be centrifuged again and so on will create a permanent water circuit between the turbine chamber 4 and the fluid chamber 1, solving the technical problems posed above.
  • Figure 3 shows a sectional view of part of a pump according to a second embodiment of the invention.
  • the seal is ensured here by a flat seal 12 pressed between the membrane 13 of the filter 14, and the partition 15, the part of which in contact with the seal may have the shape of a spout 16.
  • one or more openings 17 are made through this partition 15 in order to create the leak between the turbine chamber 18 and the filter chamber 19.
  • the seal between the partition 20 or the partition 21 of the filter chamber 22 and the membrane 23 of the filter 24 is produced by an O-ring 25.
  • the calibrated opening (s) between the filter chamber 22 and the periphery of the turbine chamber 26 can then be made through this membrane 23 in order to achieve the desired leak.
  • the present invention applies to all types of centrifugal pumps used in all types of machines comprising a fluid circuit and in particular those, provided with filters, and equipping washing machines and domestic dishwashers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Saccharide Compounds (AREA)
EP93400667A 1992-03-17 1993-03-16 Pompes centrifuges Expired - Lifetime EP0561689B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203157A FR2688830B1 (fr) 1992-03-17 1992-03-17 Amelioration apportee aux pompes centrifuges.
FR9203157 1992-03-17

Publications (2)

Publication Number Publication Date
EP0561689A1 EP0561689A1 (fr) 1993-09-22
EP0561689B1 true EP0561689B1 (fr) 1996-02-07

Family

ID=9427750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400667A Expired - Lifetime EP0561689B1 (fr) 1992-03-17 1993-03-16 Pompes centrifuges

Country Status (7)

Country Link
EP (1) EP0561689B1 (hr)
AT (1) ATE134024T1 (hr)
DE (1) DE69301480T2 (hr)
ES (1) ES2083257T3 (hr)
FR (1) FR2688830B1 (hr)
HR (1) HRP930387A2 (hr)
SI (1) SI9300124A (hr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102995360A (zh) * 2011-09-19 2013-03-27 海尔集团公司 洗衣机排水泵及其洗衣机
CN102505426A (zh) * 2011-11-08 2012-06-20 海尔集团公司 洗衣机排水泵装置及其洗衣机
CN112160910A (zh) * 2020-09-09 2021-01-01 广德元瑞生产力促进中心有限公司 一种液压渣浆泵

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397135A (en) * 1964-09-21 1968-08-13 Julius L Englesberg Integral pump and filter assembly including electrode means
FR2218781A5 (hr) * 1973-02-19 1974-09-13 Chaffoteaux Et Maury
DE8318398U1 (de) * 1983-06-24 1983-10-06 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Laugenpumpe fuer eine waschmaschine

Also Published As

Publication number Publication date
SI9300124A (en) 1993-09-30
DE69301480T2 (de) 1996-06-27
DE69301480D1 (de) 1996-03-21
ES2083257T3 (es) 1996-04-01
FR2688830A1 (fr) 1993-09-24
ATE134024T1 (de) 1996-02-15
FR2688830B1 (fr) 1995-04-28
EP0561689A1 (fr) 1993-09-22
HRP930387A2 (en) 1994-12-31

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