EP2161455B1 - Pompe double - Google Patents

Pompe double Download PDF

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Publication number
EP2161455B1
EP2161455B1 EP08015575.7A EP08015575A EP2161455B1 EP 2161455 B1 EP2161455 B1 EP 2161455B1 EP 08015575 A EP08015575 A EP 08015575A EP 2161455 B1 EP2161455 B1 EP 2161455B1
Authority
EP
European Patent Office
Prior art keywords
pump
double pump
flow
check valve
inflow
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.)
Active
Application number
EP08015575.7A
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German (de)
English (en)
Other versions
EP2161455A1 (fr
Inventor
Niels Kristian Bach Andersen
Michael Høyer Lillelund
Jørgen Schmidt
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.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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Publication date
Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP08015575.7A priority Critical patent/EP2161455B1/fr
Publication of EP2161455A1 publication Critical patent/EP2161455A1/fr
Application granted granted Critical
Publication of EP2161455B1 publication Critical patent/EP2161455B1/fr
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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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0016—Control, e.g. regulation, of pumps, pumping installations or systems by using valves mixing-reversing- or deviation valves
    • 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
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type

Definitions

  • the invention relates to a double pump with the features specified in the preamble of claim 1.
  • Double pumps are particularly state of the art as heating circulation pumps and serve to ensure the pumping capacity even in the event of a pump failure.
  • the second pump of the double pump can be switched on and take over the pump function.
  • a return flow of the pumped medium into the failed first centrifugal pump and thus a short-circuit current is to be avoided.
  • double pumps regularly have a non-return valve, which closes the output of the non-active pump.
  • These check valves are usually flow controlled, i. They are controlled by the flow of the pumped medium in their respective closed or open position and held there.
  • Such a double pump with a flow-controlled non-return valve is manufactured under the type name MAGNA-UPE (D) 32-120F from Grundfos.
  • the double pump according to the invention has two pumps, the pressure-side lines open into a common output line. Furthermore, it has a flow-controlled non-return valve arranged in the mouth region of the pressure-side lines, which flow passage when flowing through a first pressure-side line the other, two te, pressure-side line closes.
  • the non-return flap of the double pump has at least one in the closed position in the flow path projecting and upstream facing inflow surface, which is formed by a valve disposed on the non-return valve spoiler. In this closed position, the flow path is formed by the first pressure-side line and the common output line.
  • the inflow area from the inflow in the flow path can apply a closing force sufficient for the check flap closure even at high delivery flows or at low delivery pressures.
  • a significantly improved flap closure and therefore at low delivery pressures achieve a significantly increased delivery rate.
  • a equipped with the non-return valve according to the invention double pump can thus be operated over the entire speed range without certain speed ranges should not be approached because of poorly closing check valve and thus poorer efficiency of the pump.
  • the invention is in the double pump formed the inflow by a arranged on the non-return flap spoiler.
  • the non-return flap preferably has an inflow surface at its two flat sides facing away from one another. This is particularly relevant for non-return valves, which can each mutually close an outlet of a pump and to have two closed positions. With the formation of each an inflow surface on the two facing away from each other flat sides of the non-return valve, it is strömungskraftbeaufschlagbar in each closed position.
  • the inflow surfaces are each surrounded by a sealing surface in the double pump.
  • This embodiment is particularly useful for the double pump described above.
  • the check valve in each closed position with its sealing surface tightly against the respective output of a pump and also be subjected to force in each of its closed position by flow.
  • the arrangement of the sealing surface allows a uniform application of force to the sealing surface in the direction of a contact surface.
  • the inflow surface is in a sealing surface formed in this way almost the entire flat side of the flap available, so that the sealing surface in the design and design of the inflow surface forms virtually no restriction.
  • the inflow surface is uniaxially curved, wherein on the one hand the axis of curvature is arranged parallel to the pivot axis of the flap and on the other hand, the curved inflow surface is arranged concavely to the flow path.
  • the flap is curved in such a way that the upstream surface merges with a nearly smooth transition as steadily as possible into a flat side of the non-return flap upstream. In such a Design can be an efficient application of force to the non-return valve at the same time achieve extremely low flow resistance.
  • double pump 5 is a heating circulation pump.
  • the double pump 5 has an input line 7, the two in a common housing 8 arranged centrifugal pumps 10, 15 feeds.
  • the common input line 7 branches into two supply lines, each of which opens into a suction mouth of the two pumps 10, 15 (not shown in the drawing).
  • the two suction orifices each feed an impeller 16, 17 of the two pumps, from which the delivery fluid exits radially and subsequently via two screw housing 18, 19 to two pressure-side lines 20, 25 of the pumps 10, 15 passes.
  • These two pressure-side lines 20, 25 open into an orifice region 27 in a common outlet line 30 of the double pump 5.
  • a non-return valve 35 is pivotally mounted about an axis 40.
  • the check valve 35 can in each case a line 20, 25 of the two pumps 10, 15 close. Therefore, the non-return valve 35 is formed on both flat sides 45, 50 for engagement with a respective contact surface 55, 60 of the two pressure-side lines 20, 25.
  • the non-return valve 35 on its two flat sides 45, 50, two sealing surfaces 65, 70, which with the contact surfaces 55, 60 a dense Allow closure of the conduit 20 or the conduit 25.
  • the sealing surfaces 65, 70 are formed by the flat sides of the non-return valve 35.
  • the sealing surface only in the system area, that is to say, for example, in the area of a peripheral edge of the non-return flap 35.
  • the check valve 35 closes the right-hand pressure-side line 25 of the right pump 15, so that the left-hand pressure-side line 20 of the left pump 10 with the common output line 30 forms a flow path 75.
  • the check valve 35 has on its flat sides 45, 50 in each case an inflow surface 80, 85, of which the inflow surface 80, which is close to the flow path 75, projects into the flow path 75.
  • This is the left inflow surface 80.
  • the design of the inflow surfaces 80, 85 can Fig. 2 be removed.
  • one of two spoilers 90, 95 is attached to the two flat sides 45, 50, whose sides 80, 85 remote from the longitudinal center plane of the non-return flap 35 form the inflow surfaces 80, 85.
  • the inflow surfaces 80, 85 pass steadily and smoothly into the flat sides 45, 50 of the non-return flap 35 at their sides close to the pivot axis 40.
  • the spoilers 90, 95 are substantially thin and flat educated.
  • the spoiler 90, 95 with supports 100 are supported by the flat sides 45, 50 of the non-return valve 35.
  • spoiler 95, support 100 and check valve 35 are integrally formed.
  • the sealing surfaces 65, 70 are formed by those surface areas on the flat sides 45, 50, which surround the spoiler 90, 95.
  • the double pump 5 described above has at high flow rates a higher flow rate than comparable double pumps according to the prior art, as shown in the diagram Fig. 3 can be removed.
  • the delivery head H is shown as a function of the delivery flow Q of the previously described pump (solid curve 120).
  • the diagram also includes a corresponding curve 117 for a double pump according to the prior art (dashed curve).
  • the curves overlap, ie the pumps operate with equal effect. Only from a point 115, the pump curve 117 drops significantly for the double pump according to the prior art.
  • the double pump or non-return valve ensures, as the curve 120 shows, that the shape of the pump curve avoids this steep drop and compared to the pump curve 117, especially in the range of large flow rates and small heads, a higher flow rate, since the check valve also closes tight in this area and thus no or at least lower short-circuit currents occur.

Landscapes

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

Claims (4)

  1. Pompe double (5) avec deux pompes (10, 15) dont les conduits (20, 25) du côté pression débouchent dans un conduit de sortie (30) commun, avec un clapet anti-retour (35) commandé par un flux, disposé dans la zone de débouché (27) et qui, lorsqu'un flux passe par un conduit (20) du côté pression, ferme l'autre conduit (25) du côté pression, et qui comprend au moins une surface d'afflux (80, 85) s'étendant, en position de fermeture, jusque dans la trajectoire de flux (75), laquelle surface est orientée vers l'amont, caractérisée en ce que la surface d'afflux (80, 85) est formée par un déflecteur (90, 95) disposé sur le clapet anti-retour (35).
  2. Pompe double (5) selon la revendication 1, caractérisée en ce que le clapet anti-retour (35) comprend sur ses deux faces planes (45, 50) opposées une surface d'afflux (80, 85) respective.
  3. Pompe double (5) selon la revendication 1 ou 2, caractérisée en ce que les surfaces d'afflux (80, 85) sont entourées chacune d'une surface d'étanchéité (65, 70).
  4. Pompe double (5) selon l'une des revendications 1 à 3, caractérisée en ce que la surface d'afflux (80, 85) est incurvée selon un seul axe, l'axe de courbure étant disposé parallèlement à l'axe de pivotement (40) du clapet anti-retour (35) et la surface courbe d'afflux (80, 85) étant disposée en position concave vers la trajectoire de flux (75).
EP08015575.7A 2008-09-04 2008-09-04 Pompe double Active EP2161455B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08015575.7A EP2161455B1 (fr) 2008-09-04 2008-09-04 Pompe double

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08015575.7A EP2161455B1 (fr) 2008-09-04 2008-09-04 Pompe double

Publications (2)

Publication Number Publication Date
EP2161455A1 EP2161455A1 (fr) 2010-03-10
EP2161455B1 true EP2161455B1 (fr) 2018-05-30

Family

ID=40428187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08015575.7A Active EP2161455B1 (fr) 2008-09-04 2008-09-04 Pompe double

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EP (1) EP2161455B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010055841A1 (de) 2010-12-23 2012-06-28 Wilo Se Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates
DE102014006258A1 (de) * 2014-04-30 2015-11-05 Wilo Se Verfahren zur Regelung eines Pumpensystems und geregeltes Pumpensystem
DE102015016086A1 (de) * 2015-12-10 2017-06-29 Wilo Se Doppelpumpe
JP2022187176A (ja) 2021-06-07 2022-12-19 株式会社荏原製作所 ポンプケーシング
JP2022187178A (ja) 2021-06-07 2022-12-19 株式会社荏原製作所 吐出合流部、ポンプケーシング、およびポンプ装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1142593A (fr) * 1956-02-08 1957-09-19 Guinard Pompes Perfectionnement aux pompes centrifuges à deux sens de rotation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2017033A (en) 1935-02-09 1935-10-08 Charlie L Mcguffin Manifold valve for slush pumps
DE1528649B2 (de) * 1966-07-21 1973-06-14 Loewe Pumpenfabnk GmbH, 3140 Lune bürg Umschaltklappe fuer ein pumpenaggregat
DE4330507C1 (de) * 1993-09-09 1994-10-06 Grundfos As Klappenumschaltvorrichtung für die Druckseite einer Doppelpumpe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1142593A (fr) * 1956-02-08 1957-09-19 Guinard Pompes Perfectionnement aux pompes centrifuges à deux sens de rotation

Also Published As

Publication number Publication date
EP2161455A1 (fr) 2010-03-10

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