EP0953772B1 - Pompe centrifuge avec vis de purge - Google Patents

Pompe centrifuge avec vis de purge Download PDF

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Publication number
EP0953772B1
EP0953772B1 EP99108733A EP99108733A EP0953772B1 EP 0953772 B1 EP0953772 B1 EP 0953772B1 EP 99108733 A EP99108733 A EP 99108733A EP 99108733 A EP99108733 A EP 99108733A EP 0953772 B1 EP0953772 B1 EP 0953772B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
motor
bleed screw
driven centrifugal
pump according
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
EP99108733A
Other languages
German (de)
English (en)
Other versions
EP0953772A1 (fr
Inventor
Bernd Goronzy
Helmut Rückwardt
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.)
Wilo GmbH
Original Assignee
Wilo GmbH
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 Wilo GmbH filed Critical Wilo GmbH
Publication of EP0953772A1 publication Critical patent/EP0953772A1/fr
Application granted granted Critical
Publication of EP0953772B1 publication Critical patent/EP0953772B1/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
    • F04D9/001—Preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0626—Details of the can

Definitions

  • the invention relates to a centrifugal pump with a Canned tube through which the medium is flowing for cooling is, through a shaft bore the fluid in the pump suction chamber flows back and to vent the A vent screw at the bottom of the can Canned tube is arranged.
  • Centrifugal motor pumps are known, see e.g. FR-A-1 399 292, whose canned space is vented by means of a bleed screw, which on Bottom of the can is screwed in. After opening one the vent screw emerges from inside the A water / air mixture.
  • a bleed screw After opening one the vent screw emerges from inside the A water / air mixture.
  • leakage of water does not mean that the pump is complete is vented because when the pump is vented in Suction chamber already has water and air only through the small gap between the shaft and the radial bearing can escape. This allows water to flow through faster the shaft bore in the upper area of the containment shell and the vent screw enters Water / air mixture out, although the pump chamber is not is completely flooded. This is particularly serious if a pump has several hydraulic levels.
  • the object of the invention is a pump of the beginning to improve the type mentioned so that it can be clearly identified is whether the hydraulic range of the pump is sufficient is filled with water and that a complete Venting of the pump is guaranteed.
  • vent screw in the open state directly or closes the shaft bore via an intermediate part.
  • the Vent screw at its inner end a head has in the closed state with a conical rear ring surface on a conical seat of the bore in which the Vent screw is screwed in. It is also sealing with 0-ring or flat gasket possible.
  • the head of the Vent screw with its front on the Rest the shaft end.
  • vent screw in a threaded insert lies in the bottom of the Can is attached.
  • a simple push of the Bleed screw is reached when the Vent screw on the outside of it Actuation of a polygonal one Hexagon pocket hole has.
  • the shaft be vertical stands.
  • the centrifugal motor pump can also have several Have pump stages.
  • FIGS. 1 and 2 only the end region 1 is smaller Diameter of the can 2 shown.
  • the bearing 3 in which the end of the motor shaft 4 is supported.
  • the wave 4 has a coaxial shaft bore 5 through which The inside of the canned pipe for cooling flowing water Pump room can flow back.
  • the inside of the canned pipe for cooling flowing water Pump room can flow back.
  • the pump builds up water from the Pressure side of the pump through the rotor space and thus through the inside of the can and through a gap between Shaft and radial bearing in the top area of the can and then through the shaft bore 5 back into the not illustrated suction chamber of the impeller that on the other End of the shaft 4 is attached.
  • the cup-shaped end region 1 of the can 2 has a coaxial opening 6 with a socket-shaped extension, in attached to a threaded insert 7, in particular is welded or soldered.
  • the cross section T-shaped thread insert 7 has a coaxial Threaded bore 8 in which a vent screw 9 is screwed in. Above the bleed screw 9 is the front outer wall of the Motor housing.
  • vent screw 9 At the inner end of the vent screw 9 is a head 11 molded on, which forms a conical annular surface 12, the with the vent screw closed on a Taper seat 13 of the threaded insert 7 rests. Will the Vent screw 9 down to the open position screwed, the screw 9 moves in the direction of Face 14 of the shaft 4 and closes the Opening or mouth 15 of the shaft bore 5, as in Fig. 2 shown. As a result, water can no longer come out of the Shaft bore 5 emerge and only air occurs next to the Vent screw 9 upwards.
  • the Bleed screw 9 also directly in opening 6 be screwed, especially if the opening 6 a has a smaller diameter. Furthermore, the Vent screw 9 a key surface laterally exhibit.
  • the centrifugal motor pump is preferably installed so that the shaft or axis is vertical, the Bleed screw 9 is on top. Preferably owns the pump has several pump stages. Finally, between the head 11 and the upper end of the shaft 4 Be arranged intermediate part, in particular on the head 11th is attached to represent an extension or to achieve greater tightness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (7)

  1. Motopompe centrifuge avec une gaine de moteur (2) qui, pour le refroidissement, est traversée par le liquide refoulé, le liquide refoulé refluant dans la chambre d'aspiration de la pompe par un alésage (5) d'arbre et, pour l'aération du volume de la gaine de moteur, une vis d'aération (9) étant disposée au fond de la gaine de moteur,
    caractérisée en ce que la vis d'aération (9), à l'état ouvert, ferme l'alésage (5) d'arbre directement ou par une pièce intermédiaire.
  2. Motopompe centrifuge selon la revendication 1,
    caractérisée en ce que la vis d'aération (9) présente, à son extrémité intérieure, une tête (11) et, à l'état fermé, est en appui par une surface annulaire (12) arrière de forme conique sur une surface de siège (13) de forme conique d'un alésage (8) dans lequel est vissée la vis d'aération.
  3. Motopompe centrifuge selon la revendication 2,
    caractérisée en ce que, à l'état ouvert, la tête (11) de la vis d'aération (9) est soutenue par sa face avant sur l'extrémité de l'arbre.
  4. Motopompe centrifuge selon l'une des revendications précédentes,
    caractérisée en ce que la vis d'aération (9) est logée dans un insert (7) taraudé qui est fixé dans le fond de la gaine de moteur (2).
  5. Motopompe centrifuge selon l'une des revendications précédentes,
    caractérisée en ce que la vis d'aération (9) présente sur son côté extérieur, pour son actionnement, un alésage borgne polygonal, en particulier hexagonal.
  6. Motopompe centrifuge selon l'une des revendications précédentes,
    caractérisée en ce que l'arbre (4) est vertical.
  7. Motopompe centrifuge selon l'une des revendications précédentes,
    caractérisée en ce qu'elle présente plusieurs étages de pompe.
EP99108733A 1998-05-02 1999-04-30 Pompe centrifuge avec vis de purge Expired - Lifetime EP0953772B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19819690 1998-05-02
DE19819690A DE19819690A1 (de) 1998-05-02 1998-05-02 Kreiselmotorpumpe mit Entlüftungsschraube

Publications (2)

Publication Number Publication Date
EP0953772A1 EP0953772A1 (fr) 1999-11-03
EP0953772B1 true EP0953772B1 (fr) 2001-02-07

Family

ID=7866517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99108733A Expired - Lifetime EP0953772B1 (fr) 1998-05-02 1999-04-30 Pompe centrifuge avec vis de purge

Country Status (2)

Country Link
EP (1) EP0953772B1 (fr)
DE (2) DE19819690A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009033111A1 (de) * 2009-07-15 2011-02-03 Ksb Aktiengesellschaft Spalttopf

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB834951A (en) * 1957-10-28 1960-05-11 Faere Armaturfabrik Ab Improvements in or relating to electromotor-driven centrifugal pump assemblies
GB963993A (en) * 1960-10-17 1964-07-15 Hollesens Fabrikker As H Improvements in and relating to electric motor-driven liquid pumps
FR1399292A (fr) * 1964-06-22 1965-05-14 Taco Inc Pompe
DE7523874U (de) * 1975-07-26 1976-08-05 Wilo-Werk Gmbh & Co - Pumpen - Und Apparatebau, 4600 Dortmund Stopfbuchsloses pumpenaggregat
DE2941133C2 (de) * 1979-10-10 1985-01-31 Speck-Kolbenpumpen-Fabrik Otto Speck Kg, 8192 Geretsried Heizungsumwälzpume
DE3701562C2 (de) * 1986-03-12 1996-02-08 Wilo Gmbh Kreiselpumpe mit Spaltrohrmotor
DE4208829C2 (de) * 1992-03-19 1995-04-27 Wilo Gmbh Spaltrohrmotorpumpe

Also Published As

Publication number Publication date
DE59900040D1 (de) 2001-03-15
DE19819690A1 (de) 1999-11-04
EP0953772A1 (fr) 1999-11-03

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