EP2161455A1 - Pompe double - Google Patents

Pompe double Download PDF

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Publication number
EP2161455A1
EP2161455A1 EP08015575A EP08015575A EP2161455A1 EP 2161455 A1 EP2161455 A1 EP 2161455A1 EP 08015575 A EP08015575 A EP 08015575A EP 08015575 A EP08015575 A EP 08015575A EP 2161455 A1 EP2161455 A1 EP 2161455A1
Authority
EP
European Patent Office
Prior art keywords
inflow
return
double pump
flow
inflow surface
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
EP08015575A
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German (de)
English (en)
Other versions
EP2161455B1 (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
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 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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Anticipated expiration legal-status Critical

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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 and a non-return valve for such a double pump or other branching.
  • 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. Further, it has a flow-controlled non-return valve arranged in the mouth region of the pressure-side lines, which closes the other, second, pressure-side line when a first pressure-side line flows through.
  • the non-return flap of the double pump has at least one in the closed position in the flow path projecting inflow surface, which is facing upstream. In this closed position, the flow path is formed by the first pressure-side line and the common output line. On a so-directed inflow area acts by the flow in the flow path, a force which is directed obliquely to transversely to the main flow direction of the flow path. In this way, the check valve located in its closed position by the flow of the inflow even more force in its closed position force, namely by the force resulting from the flow.
  • the inflow area is formed by a spoiler arranged on the non-return flap.
  • a spoiler arranged on the non-return flap.
  • 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 curved uniaxially, 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 an embodiment, an efficient application of force to the non-return valve can be achieved with simultaneously extremely low flow resistance.
  • the solution according to the invention is not limited to the check valve of a double pump, but can also be used in a check valve for any other branching.
  • the non-return valve on at least one inflow, which obliquely to the longitudinal center plane the non-return flap is oriented and remote from the pivot axis of the non-return flap of the longitudinal center plane is further spaced than near the pivot axis. If the non-return valve according to the invention is arranged in a line branch in such a way that it closes the other line branch when a line branch flows through it, the leading surface advantageously effects an increased application of force to the non-return valve in this closed position.
  • the force required for this results from the flow in the flow path formed by the flow-through line branch.
  • a non-return flap is regularly oriented such that the pivot axis passes through an upstream part of the non-return flap.
  • the inflow surface of the check valve according to the invention downstream is further spaced from the longitudinal center plane of the check valve than at an upstream region of the non-return valve. Accordingly, the inflow surface of the non-return valve in the closed position protrudes into the flow path in such a way that it faces upstream.
  • the flow of the inflow surface in the flow path generates a force that controls the non-return valve much stronger than known check valves in their closed position. In this way, the check valve closes reliably even at low delivery pressure and high flow.
  • 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 housings 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)
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 true EP2161455A1 (fr) 2010-03-10
EP2161455B1 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

Country Status (1)

Country Link
EP (1) EP2161455B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469094A2 (fr) 2010-12-23 2012-06-27 Wilo Se Procédé de fonctionnement d'un agrégat de pompes doubles ou multipompes
DE102014006258A1 (de) * 2014-04-30 2015-11-05 Wilo Se Verfahren zur Regelung eines Pumpensystems und geregeltes Pumpensystem
EP3179110A1 (fr) * 2015-12-10 2017-06-14 Wilo Se Pompe double corps
EP4102078A2 (fr) 2021-06-07 2022-12-14 Ebara Corporation Partie de fusion de décharge, boîtier de pompe et appareil de pompe
EP4102076A1 (fr) 2021-06-07 2022-12-14 Ebara Corporation Carter de pompe

Citations (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
DE1528649A1 (de) * 1966-07-21 1969-05-29 Flygts Pumpar Ab Pumpenaggregat,bestehend aus zwei Schleuderpumpen
DE4330507C1 (de) * 1993-09-09 1994-10-06 Grundfos As Klappenumschaltvorrichtung für die Druckseite einer Doppelpumpe

Family Cites Families (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

Patent Citations (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
DE1528649A1 (de) * 1966-07-21 1969-05-29 Flygts Pumpar Ab Pumpenaggregat,bestehend aus zwei Schleuderpumpen
DE4330507C1 (de) * 1993-09-09 1994-10-06 Grundfos As Klappenumschaltvorrichtung für die Druckseite einer Doppelpumpe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469094A2 (fr) 2010-12-23 2012-06-27 Wilo Se Procédé de fonctionnement d'un agrégat de pompes doubles ou multipompes
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
EP3179110A1 (fr) * 2015-12-10 2017-06-14 Wilo Se Pompe double corps
EP4102078A2 (fr) 2021-06-07 2022-12-14 Ebara Corporation Partie de fusion de décharge, boîtier de pompe et appareil de pompe
EP4102076A1 (fr) 2021-06-07 2022-12-14 Ebara Corporation Carter de pompe

Also Published As

Publication number Publication date
EP2161455B1 (fr) 2018-05-30

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