EP1293678A2 - Rouet de pompe avec fonction de clapet anti-retour intégré - Google Patents

Rouet de pompe avec fonction de clapet anti-retour intégré Download PDF

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Publication number
EP1293678A2
EP1293678A2 EP02013218A EP02013218A EP1293678A2 EP 1293678 A2 EP1293678 A2 EP 1293678A2 EP 02013218 A EP02013218 A EP 02013218A EP 02013218 A EP02013218 A EP 02013218A EP 1293678 A2 EP1293678 A2 EP 1293678A2
Authority
EP
European Patent Office
Prior art keywords
impeller
pump
pump according
valve
receptacle
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.)
Granted
Application number
EP02013218A
Other languages
German (de)
English (en)
Other versions
EP1293678A3 (fr
EP1293678B1 (fr
Inventor
Günter Strelow
Bernd-Thorsten Stock
Dirk Nowak
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 SE
Original Assignee
Wilo AG
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 AG filed Critical Wilo AG
Publication of EP1293678A2 publication Critical patent/EP1293678A2/fr
Publication of EP1293678A3 publication Critical patent/EP1293678A3/fr
Application granted granted Critical
Publication of EP1293678B1 publication Critical patent/EP1293678B1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/042—Axially shiftable rotors
    • 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
    • F04D29/10—Shaft sealings
    • F04D29/14—Shaft sealings operative only when pump is inoperative
    • F04D29/146—Shaft sealings operative only when pump is inoperative especially adapted for liquid pumps

Definitions

  • the present invention relates to a centrifugal pump with a on a shaft held impeller, which has a central suction mouth as an inlet opening, whereby the medium that has entered through the suction mouth over a Leaving in particular arranged in the peripheral surface and wherein the impeller from a pump housing forming the impeller chamber is surrounded.
  • Centrifugal pumps with such impellers are well known. It is also the problem is known that with such centrifugal pumps at a standstill a certain Leakage current can flow through the impeller. Centrifugal pumps can therefore In contrast to gear pumps, for example, no valve function within Realize pipeline networks. To the line around a centrifugal pump shutting off requires additional and costly valves. Normally However, the disadvantage of the leakage current does not weigh particularly heavily, since it only occurs with pressure differences, is also relatively small and therefore only has a minor impact on the overall system. Has a particularly disadvantageous effect the leakage current in the case of "decentralized" in the heating circuit of a building arranged pumps, which are arranged in the vicinity of a radiator and only this or sometimes the neighboring ones in the same room Supply the existing radiator with medium.
  • the leakage flow is due to the natural Convection supports that alone, as known from a central heating system Distribution of hot heating water even without the use of a pump can effect. Convection therefore pushes the hot water through the impeller the decentralized heating pump without it being able to stop the flow.
  • the leakage flow causes an undesired heating up of the radiator and thus a reduction in living comfort and above all an unnecessary loss of energy.
  • Such a leak flow can also be caused by one pump operating in the system another switched off pump overflows. Such a leak flow can not only in Pump direction but also against the pump direction.
  • the object of the present invention is therefore to provide an inexpensive to create a centrifugal pump of the type mentioned, which is more compact Construction and good hydraulic properties an easy way to Shuts off a leakage flow occurring through the impeller.
  • the basic idea of the invention is that one of the Openings of the impeller with a cover arranged in the pump housing blocked and thus a leakage current is stopped. Either one of the Openings are closed immediately, or the stream is in immediate Blocked near the impeller inside the impeller chamber.
  • the pump works thus as a valve that blocks in both directions, taking it through suitable constructive measures is also possible to block in only one direction the nature of a check valve.
  • For sealing the leakage flow can either the inlet opening and / or the outlet openings of the Impeller can be closed directly or indirectly with the valve member. So can cylindrical impellers with their radially arranged outlet openings, frustoconical impellers with correspondingly arranged at an angle Outlet openings and also propellers are sealed. In any case, the Leakage flow effectively interrupted in a simple manner. There are different ones Possible ways of realizing the valve function.
  • a flat valve disc of be pressed inside or, if necessary, from the outside onto the suction mouth.
  • the valve member and / or the valve seat is not a separate actuator within of the pump housing but is integrated in the inner wall.
  • the pump housing and the impeller against each other in axial Are displaceable and the valve member is one of the openings after the Shift closes or blocks the river. So it is possible the number components and a high degree of reliability with a compact design to reach the pump.
  • Part of the inner wall can also be from one Hydraulic insert be formed, the one hand the inlet opening and the other the end wall of the pump housing surrounding the suction mouth.
  • a structurally particularly simple and therefore advantageous solution lies in the Inner wall of the pump housing with a cylindrical receptacle provided, into which the impeller can be inserted and with the edge of the impeller offers a stop.
  • a cylindrical receptacle provided, into which the impeller can be inserted and with the edge of the impeller offers a stop.
  • one Sealing in the axial direction instead.
  • the promotional part of the impeller is thereby deactivated in a way.
  • Such an axial seal which the closes radial openings indirectly, is also in contrast to one possible radial immediate sealing is advantageous because the movement of the Impeller is not hindered.
  • the impeller lifts in its disengaged position simply off the sealing surface and can rotate freely.
  • the impeller has the function of a valve member, in particular of a valve cone that is against a valve seat formed by the pump housing is pressed.
  • the seat and the valve member need not necessarily be have a radially arranged sealing surface, also other arrangements of Sealing surfaces, e.g. conical, are conceivable. It is also possible to choose between Sealing surfaces to provide sealing profiles.
  • the impeller and / or the sealing surface serving stop can be made of a sealing plastic.
  • the impeller is slidably mounted on the shaft and with an axial displacement into the receptacle arranged on the end face of the impeller can be indented.
  • the displacement of the impeller can be different Way done. So the impeller or the shaft or the rotor with impeller or the whole motor by means of electrical, magnetic, mechanical or thermal forces can also be shifted.
  • the valve function can be controlled by changing the direction of rotation. If the direction of rotation of the impeller is correct, the impeller would be in the disengaged and in the "wrong" direction of rotation in the engaged position to be brought.
  • the motor power would use the impeller of its inertia in the valve seat when the shaft accelerates so strongly is that the impeller cannot follow. In the closed position it will Valve advantageously locked to secure the position.
  • a This could be the thread on the shaft to realize the displacement Slope in the area of the end position can be designed self-locking.
  • the impeller is engaged by a short reverse run or on other type is effected, so it is definitely preferable if the impeller automatically when the rotation stops, i.e. without handling by a Operator engages in the receptacle.
  • Such an automatic engagement can in the case of a short reverse run by running a program in the engine control. However, it can also be done simply by force a relaxing spring caused by the pump running a magnetic force or a hydraulically generated mechanical force is applied. Such a magnetic force could, for example, by current-carrying windings of the electric motor are generated. Once the If the engine stops, the field collapses and the spring could relax.
  • FIG. 1 shows a special design of a centrifugal pump. Acting it is a pump that is decentralized, i.e. in the immediate vicinity of a Radiator is arranged.
  • the special design allows the pump by means of a thread 1 in the connecting flange of a thermostatic valve can be screwed in.
  • To the hydraulic conditions in one to meet such a connection flange are not only the inlet with its Inlet line 2, but also the outlet 3 in the axial direction.
  • the Sealing between the pump and the connector is done by means of an O-ring held in a groove 7.
  • the pump itself has a drive on its electrical side Electric motor 4 and on the hydraulic side a held on the shaft 5 Impeller 6, which has a central suction mouth 20 as an inlet opening.
  • the Impeller 6 is surrounded by a pump or impeller housing 8, which in this Case has a pear shape and as an adapter for connection to the Connection piece of the thermostatic valve is formed.
  • the adapter 8 is over a bayonet lock 9 connected to the motor 4 and by means of an O-ring 10 sealed.
  • In the impeller chamber 19 there is a hydraulic insert 11 arranged, the outlet 2 with its hydrodynamically designed surface shapes and defines the geometry of the impeller chamber.
  • guide structures 17 are arranged, which hold the hydraulic insert 11 and the swirl of the outflowing water brake.
  • the impeller 6 is displaceable (double arrow A) on the shaft 5 stored and can in a cylindrical formed by the hydraulic insert 11 Recording 12 can be indented.
  • the engaged state is shown in Figure 2. It can be clearly seen that the flow through the impeller 6 in the disengaged Condition ( Figure 1) is not disabled. The centrifugal pump works in this state in a known manner. If the motor runs backwards briefly, the impeller moves 6 in the receptacle 12 such that the cylindrical edge 13 of the impeller the sealing surface 18 of the hydraulic insert 11 comes to rest. Thus the Outlet openings 14 closed and any leakage flow sealed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP20020013218 2001-09-14 2002-06-15 Rouet de pompe avec fonction de clapet anti-retour intégré Expired - Lifetime EP1293678B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001145411 DE10145411A1 (de) 2001-09-14 2001-09-14 Laufrad mit Ventilfunktion
DE10145411 2001-09-14

Publications (3)

Publication Number Publication Date
EP1293678A2 true EP1293678A2 (fr) 2003-03-19
EP1293678A3 EP1293678A3 (fr) 2004-01-07
EP1293678B1 EP1293678B1 (fr) 2007-10-10

Family

ID=7699078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020013218 Expired - Lifetime EP1293678B1 (fr) 2001-09-14 2002-06-15 Rouet de pompe avec fonction de clapet anti-retour intégré

Country Status (2)

Country Link
EP (1) EP1293678B1 (fr)
DE (2) DE10145411A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2870898A1 (fr) * 2004-05-28 2005-12-02 Mark Iv Systemes Moteurs Sa Dispositif de pompe a debit variable
EP1767788A1 (fr) * 2005-09-23 2007-03-28 Coprecitec, S.L. Pompe pour électroménager
DE102007052082A1 (de) * 2007-10-31 2009-05-07 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Pumpe mit Ventilfunktion
EP2228891A2 (fr) 2009-03-10 2010-09-15 Wilo Se Moteur électrique destiné à actionner une soupape

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027319B4 (de) * 2006-06-13 2014-05-22 Wilo Ag Kreiselmotorpumpe mit drehrichtungsbestimmtem Anlauf
DE102010062752A1 (de) * 2010-12-09 2012-06-14 Mahle International Gmbh Pumpe
BE1031160B9 (de) * 2022-12-20 2024-09-30 Wilo Se Verfahren zum Lösen einer Verstopfung einer Abwasserpumpe
EP4571117A1 (fr) * 2023-12-11 2025-06-18 Xylem Europe GmbH Pompe pour pomper un liquide ainsi qu'unité hydraulique pour une telle pompe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE911352C (de) * 1943-01-17 1954-05-13 Fritz Schupp Kreiselmaschine mit Einrichtung zur gegenseitigen Verstellung der Lauf- und Leitraeder
CH339496A (de) * 1955-08-03 1959-06-30 Sfindex Kreiselpumpe
US3404631A (en) * 1966-06-09 1968-10-08 Westinghouse Electric Corp Centrifugal pump
FR1563183A (fr) * 1968-02-29 1969-04-11
DE2510787A1 (de) * 1975-03-08 1976-09-16 Vaillant Joh Kg Pumpe
DE2640990A1 (de) * 1976-09-11 1978-03-16 Klein Schanzlin & Becker Ag Kreiselpumpe mit selbsttaetiger axialschubregelung an einem der laufraeder
DE19711178A1 (de) * 1997-03-18 1998-09-24 Wilo Gmbh Pumpe im Warmwasserkreislauf einer Zentralheizung
DE10115989A1 (de) * 2000-04-04 2001-12-13 Bernhard Stadler Radial-Strömungsmaschine, insbesondere Umwälzpumpe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2870898A1 (fr) * 2004-05-28 2005-12-02 Mark Iv Systemes Moteurs Sa Dispositif de pompe a debit variable
EP1767788A1 (fr) * 2005-09-23 2007-03-28 Coprecitec, S.L. Pompe pour électroménager
DE102007052082A1 (de) * 2007-10-31 2009-05-07 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Pumpe mit Ventilfunktion
EP2055958A3 (fr) * 2007-10-31 2013-02-27 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager à conduite d'eau doté d'une pompe ayant une fonction de ventilation
EP2228891A2 (fr) 2009-03-10 2010-09-15 Wilo Se Moteur électrique destiné à actionner une soupape
DE102009011946A1 (de) 2009-03-10 2010-09-16 Wilo Se Elektromotor zum Betätigen eines Ventils
EP2228891A3 (fr) * 2009-03-10 2016-09-14 Wilo Se Moteur électrique destiné à actionner une soupape

Also Published As

Publication number Publication date
EP1293678A3 (fr) 2004-01-07
DE10145411A1 (de) 2003-04-03
DE50211038D1 (de) 2007-11-29
EP1293678B1 (fr) 2007-10-10

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