EP0243518A1 - Zentrifugalpumpe für Wasserumlauf - Google Patents
Zentrifugalpumpe für Wasserumlauf Download PDFInfo
- Publication number
- EP0243518A1 EP0243518A1 EP86105878A EP86105878A EP0243518A1 EP 0243518 A1 EP0243518 A1 EP 0243518A1 EP 86105878 A EP86105878 A EP 86105878A EP 86105878 A EP86105878 A EP 86105878A EP 0243518 A1 EP0243518 A1 EP 0243518A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- impeller
- centrifugal pump
- prefilter
- pump body
- 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.)
- Withdrawn
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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
Definitions
- the prefilter is so arranged as to comprise a vertical filter bowl, fitted inside an end bowl sealed hermetically by an externally threaded cover and provided with an external intake mouth and an outlet pipe connected to the axial inlet of the impeller, so that the intake liquid is forced to pass through the walls of the afore-mentioned filter bowl before reaching the electropump.
- the pump body which forms a single part with the prefilter, is linked to the electric motor housing by a markedly truncated cone-shape shield.
- the pressure chamber and the electropump are hermetically separated by a double-tapered spacer with a centre hole and arranged so that its outer edge is trapped.
- An 0-ring seal is placed between the respective contiguous edges of the above-mentioned connecting shield and the pump body, while the edges of the centre hole hold the conventional mechanical ceramic seal of the impeller.
- the impeller shaft is provided with a hollow cylindrical extension, adapted for fitting on the electric motor shaft and of a length such that its inner end is positioned between the mechanical seal and the electric motor.
- the inner edge of the diffuser engages in the linking edge of the two cones of the biconic spacer.
- the markedly biconic-shaped spacer preferably of stainless steel, offers various uses or applications. The most important of these is to act ad a heat sink when the pump is working with a water flow below its rating. It also acts as a support for the mechanical seal.
- centrifugal pump in question lies in the fact that the biconic spacer, on the wall of the inner cone, is provided with at least one shoulder for causing swirl in the water crown while the impeller is working in order to improve the cooling of the mechanical seal.
- centrifugal water circulation pump in question consists of an electric pump 1 and a prefilter 2, with a pressure chamber 3 placed between them .
- the liquid enters coaxially to the impeller 6 and is dispatched by centrifugal force to a pressure chamber 9, placed between the electric motor 4 and the prefilter 2.
- the prefilter 2 is so arranged that it comprises a vertical filter bowl 10 installed inside an outer bowl 11 tightly sealed by an outside threaded cover 12 and fitted with an external intake mouth 13 and an outlet pipe 14 connected to the axial inlet of the impeller 6.
- the intake liquid is forced to pass through the walls of the above-mentioned filter bowl 10 before reaching the electric pump 1.
- the pump body forming an integral part with the prefilter 2, is linked to the housing of the electric motor 4 by a distinctly truncated cone-shaped connecting shield 15.
- the pressure chamber 3 and the electric pump 1 are hermetically separated by a distinctly biconic-shaped spacer 16.
- the part 16 is provided with a centre hole and so arranged that its outer edge 17 is trapped.
- the edges of the afore-mentioned centre hole hold a conventional mechanical ceramic seal 19 of the impeller 6.
- the impeller shaft is provided with a hollow cylindrical extension 20 adapted for fitting on the shaft 5 of the electric motor.
- the length of the extension is such that its inner end is positioned between the mechanical seal 19 and the electric motor 4.
- the inner edge 21 of the diffuser 8 engages in the linking edge 22 of the two cones of the biconic spacer 16.
- the electric motor 4 is linked to the pump body and to the prefilter 2 by only four through bolts 24.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT8255786A PT82557A (en) | 1986-05-09 | 1986-05-09 | Centrifugal pump for water recirculation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0243518A1 true EP0243518A1 (de) | 1987-11-04 |
Family
ID=20083833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86105878A Withdrawn EP0243518A1 (de) | 1986-05-09 | 1986-04-29 | Zentrifugalpumpe für Wasserumlauf |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0243518A1 (de) |
PT (1) | PT82557A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0246645A2 (de) * | 1986-05-22 | 1987-11-25 | Jacuzzi Inc. | Dichtungskühlung für Pumpen aus Plastik |
DE29520422U1 (de) * | 1995-12-22 | 1997-04-30 | Speck-Pumpenfabrik Walter Speck KG, 91154 Roth | Selbstansaugende tauchfähige Kreiselpumpe |
DE102006023379B4 (de) * | 2006-05-17 | 2013-10-02 | Al-Ko Kober Ag | Flüssigkeitspumpe |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3252575A (en) * | 1962-06-26 | 1966-05-24 | Jacuzzi Bros Inc | Pump and filter assembly for swimming pool systems |
DE2011536A1 (de) * | 1969-04-02 | 1970-10-15 | Lowara S.p.A. (Societa per Azioni), Montecchio Maggiore, Vicenza (Italien) | Pumpe, insbesondere Kreiselpumpe |
FR2123931A5 (de) * | 1971-02-05 | 1972-09-15 | Speck Pumpen Daniel Spec | |
US3826589A (en) * | 1972-06-22 | 1974-07-30 | Sta Rite Industries | Plastic pump construction |
DE2334959A1 (de) * | 1973-07-10 | 1975-01-30 | Rudolf Dipl Ing Brazel | Fluessigkeitspumpe mit kunststoffgehaeuse |
-
1986
- 1986-04-29 EP EP86105878A patent/EP0243518A1/de not_active Withdrawn
- 1986-05-09 PT PT8255786A patent/PT82557A/pt not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3252575A (en) * | 1962-06-26 | 1966-05-24 | Jacuzzi Bros Inc | Pump and filter assembly for swimming pool systems |
DE2011536A1 (de) * | 1969-04-02 | 1970-10-15 | Lowara S.p.A. (Societa per Azioni), Montecchio Maggiore, Vicenza (Italien) | Pumpe, insbesondere Kreiselpumpe |
FR2123931A5 (de) * | 1971-02-05 | 1972-09-15 | Speck Pumpen Daniel Spec | |
US3826589A (en) * | 1972-06-22 | 1974-07-30 | Sta Rite Industries | Plastic pump construction |
DE2334959A1 (de) * | 1973-07-10 | 1975-01-30 | Rudolf Dipl Ing Brazel | Fluessigkeitspumpe mit kunststoffgehaeuse |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0246645A2 (de) * | 1986-05-22 | 1987-11-25 | Jacuzzi Inc. | Dichtungskühlung für Pumpen aus Plastik |
EP0246645A3 (de) * | 1986-05-22 | 1989-06-07 | Jacuzzi Inc. | Dichtungskühlung für Pumpen aus Plastik |
DE29520422U1 (de) * | 1995-12-22 | 1997-04-30 | Speck-Pumpenfabrik Walter Speck KG, 91154 Roth | Selbstansaugende tauchfähige Kreiselpumpe |
DE102006023379B4 (de) * | 2006-05-17 | 2013-10-02 | Al-Ko Kober Ag | Flüssigkeitspumpe |
Also Published As
Publication number | Publication date |
---|---|
PT82557A (en) | 1986-11-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB IT LI |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19880505 |