EP2913532A1 - Fluid-Umwälzpumpe, die aus zwei Untereinheiten besteht, von denen die eine von der anderen abnehmbar ist - Google Patents

Fluid-Umwälzpumpe, die aus zwei Untereinheiten besteht, von denen die eine von der anderen abnehmbar ist Download PDF

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Publication number
EP2913532A1
EP2913532A1 EP15156030.7A EP15156030A EP2913532A1 EP 2913532 A1 EP2913532 A1 EP 2913532A1 EP 15156030 A EP15156030 A EP 15156030A EP 2913532 A1 EP2913532 A1 EP 2913532A1
Authority
EP
European Patent Office
Prior art keywords
flange
circulation pump
pump according
rotor
subassembly
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Withdrawn
Application number
EP15156030.7A
Other languages
English (en)
French (fr)
Inventor
Xavier Pottier
Franck Terrien
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 Salmson France SAS
Original Assignee
Wilo Salmson France SAS
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 Salmson France SAS filed Critical Wilo Salmson France SAS
Publication of EP2913532A1 publication Critical patent/EP2913532A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the present invention relates to a pump for the circulation of fluids, in particular for the circulation of water of a building heating system comprising two subassemblies, one of which is removable relative to the other.
  • One type of known circulating pump comprises a synchronous type electric motor which is fixed by an axial side, conventionally referred to as the front side, on a centrifugal pump body.
  • the rotor of the motor has permanent magnets arranged around the axis, placed axially between a front bearing connected to the body of the pump, and a rear bearing which is fixed in a carcass surrounding the stator.
  • the stator comprises an equivalent number of coils surrounding the permanent magnets arranged in the carcass, each coil forming a magnetic pole.
  • the carcass generally supports an electrical box containing control and control elements of the motor, and connection means to the outside.
  • the control system of the synchronous motor feeds the stator coils with an alternating current comprising a phase shifted between two consecutive coils, so as to create a rotating magnetic field which drives the magnets of the rotor.
  • the axis of the rotor comprises on the outside of the front bearing a centrifugal turbine disposed in a chamber of the pump body, which sucks at its center the fluid coming from an inlet, to discharge it at its periphery with a certain pressure.
  • the motor is of the wet rotor type, this rotor being inserted into a closed air gap tube sealingly attached to the body of the pump, which comes inside the stator coils to isolate them. This sealed tube receives from the pump a small stream of water passing through it.
  • the carcass is generally fixed to the pump body while at the same time performing an axial clamping of a support of the sealed tube on this body, to ensure by this clamping the fixing and sealing of the tube .
  • a problem with this type of pump is that the disassembly of the stator, for example to change it in case of failure, requires the removal of the carcass containing the stator, resulting in the loss of pressure exerted on the tube support by the body of the pump and the loss of the tightness of this tube, as well as the disengagement the rear bearing of this stator, which produces the opening of the water circuit, and therefore leaks.
  • the present invention is intended to avoid these disadvantages of the prior art, by proposing a type of pump that allows to perform interventions quickly and easily.
  • the pump body comprises a support comprising a sheet disposed transversely to the axis of rotation of the rotor, said support having at its center an axial collar which holds in position the front bearing of the rotor.
  • the mechanical connection keeps the tight tube tight around the axial flange of the support.
  • an outer contour of the support is clamped to the pump body by a flange disposed on the rear side.
  • the flange is configured to maintain the support under the effect of pressure.
  • the rear end of the sealed tube contains the rear bearing of the rotor, and ends with a purge plug.
  • the interface flange comprises a front centering means on the flange.
  • the interface flange comprises on its front face an outwardly directed collar and having bores receiving fixing screws on the flange.
  • the interface flange comprises clipping means on the flange or comprises means providing a bayonet mounting on the flange.
  • the interface flange is made by molding a plastic material.
  • the interface flange comprises at the rear an electrical box.
  • the removable subassembly is that comprising the stator.
  • An advantage of the circulation pump according to the invention is that, thanks to the fact that the connection of the sealed tube to the pump body ensures a maintenance and a seal independently of the stator, it is easy to deposit the second subassembly comprising this stator without having to open the water circuit, which allows rapid interventions on this subset and its electrical circuit, without it then having to carry out an upgrade and or purge the water circuit .
  • the figure 1 has a first subassembly 2 comprising a pump body 4 made in a casting, comprising in a chamber 6 a centrifugal turbine 8 fixed to the front end (indicated by the arrow AV) of an axis 10 of the rotor, sucking the water through the lower inlet to discharge it through the upper outlet.
  • a centrifugal turbine 8 fixed to the front end (indicated by the arrow AV) of an axis 10 of the rotor, sucking the water through the lower inlet to discharge it through the upper outlet.
  • a support 14 formed in a sheet metal comprises a substantially flat transverse part having an outer contour clamped axially on the pump body 4 by a flange 16 disposed on the rear side, a seal 18 being interposed between the support 14 and this body 4.
  • the support 14 comprises at its center a rearward-facing axial collar, which holds inside a front bearing 12 supporting the axis 10 of the rotor, arranged just behind the turbine 8.
  • the central portion of the flange 16 extends towards its center as close to the flange of the support 14 to allow the support 14 to bear axially on the flange 16 to ensure robustness under the effect of pressure.
  • the rotor comprising magnets 20 surrounding the axis 10, is inserted into a sealed tube 22, said tube comprising a front end which clamps the flange of the support 14, in order to obtain the maintenance as well as the tightness of this tube.
  • the tube 22 is leakproof with respect to the outside of the first subassembly 2.
  • said tube is in fluid communication with the chamber 6.
  • a ring 28 comprising a cylindrical portion receiving the rear bearing 24 and whose end is closed by a screwed purge plug 26.
  • the figure 2 has a second subassembly 30 comprising the stator 32 provided with electric windings, which is inserted into an interface flange 34 comprising on its front part a generally cylindrical outer wall having a reduced thickness arranged around these coils in a controlled manner .
  • the external dimensions of the interface flange 34 at the coils 32 is thus minimum.
  • the rear portion of the interface flange 34 comprises an electrical box 48 of substantially square section, receiving an electric circuit plate 36 arranged transversely.
  • a clipped rear cover 38 closes the electrical box 48 in a sealed manner.
  • the lower side of the electrical box 48 comprises a base 40 receiving a connector 42 connected to an external electrical harness.
  • the interface flange 34 is advantageously made by molding a plastic material which makes it possible economically to obtain complex shapes such as those which, in particular, are presented by the electrical box 48, the fixing clips 46 of the electric circuit board 36 and the base of the connector 40.
  • the cylindrical portion of the interface flange 34 has on its front face, fixing means 44 on the flange 16 of the first subassembly 2, which can also be obtained by molding the plastic material.
  • the interface flange 34 has a function of connection between the flange 16 of the first subassembly 2 and the rear electrical box 48 and a function of protection of the elements contained therein.
  • the Figures 3a and 3b have the flange 16 having a substantially square outer contour, which is clamped on the pump body 4 in the case shown, and without limitation, by four clamping screws 50 arranged in the corners.
  • the interface flange 34 comprises on its front face an outwardly directed flange, having a front centering 68 which fits into the central bore of the flange 16, and four axial bores 52 regularly distributed around its periphery. Each bore 52 of the interface flange 34, disposed between two clamping screws of the flange 50, receives a fixing screw 54 which clamps this flange on the flange 16.
  • the Figures 4a and 4b have the flange 16 having a shoulder 72 facing rearward, said shoulder having an outer circular groove.
  • the interface flange 34 has at its front end the centering 68 fitting in the central bore of the flange 16, and at the rear a circular stop 70 which bears on the rear shoulder 72 of the flange.
  • the interface flange 34 has on its outer contour two clips 62 arranged at two opposite points, each forming a hook facing forward and towards the axis of the engine.
  • Each clip 62 is connected to the interface flange 34 by a hinge 64 consisting of a thin thickness of plastic material arranged tangentially, which allows pivoting around this line by pressing a rear lever 66 of this clip.
  • Figures 5a and 5b have the flange 16 having around its central bore four hooks 80 facing backwards and inwards, which are evenly spaced between the clamping screws 50. figure 5b also makes it possible to understand the fitting mode of the subassemblies 30 and 2.
  • the front end of the interface flange 34 comprises a front centering means 68 fitting into the central bore of the flange 16.
  • the outer periphery of this front centering means 68 comprises four fastening means 44 which are in the the form of bosses.
  • the bosses 44 are regularly distributed and each have in the radial direction, rotating in the anticlockwise rotation direction, first of a slope, then a circular portion centered on the axis of the rotor, and finally a outer stop.
  • a quick and efficient mounting of the bayonet type is thus carried out by axially advancing the interface flange 34 to center its front end 68 in the central bore of the flange 16, and then turning it clockwise to engage the bosses 44 in the projections. hooks 80, to put in support their outer stops on these hooks.
  • the interface flange 34 comprising a reduced thickness at the level of the stator 32, leaves a free space around this stator making it possible to dispose of the electrical components, in particular the base of the connector 40, which realize a compact pump.
  • the plastic interface flange 34 can easily be recycled by first separating the electrical components.
  • the disassembly of the subassembly 30 allows easy access to the rotor contained in the tube 22 of the subassembly 2, thus facilitating the recycling of the materials of said rotor, in particular the magnets.
  • the present invention is not limited to the examples described and shown, it is capable of variants accessible to those skilled in the art, particularly concerning the material of the interface flange, or its fixing means on the flange.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15156030.7A 2014-02-26 2015-02-20 Fluid-Umwälzpumpe, die aus zwei Untereinheiten besteht, von denen die eine von der anderen abnehmbar ist Withdrawn EP2913532A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1451555A FR3017907B1 (fr) 2014-02-26 2014-02-26 Pompe de circulation de fluide comportant deux sous-ensembles dont l'un est amovible par rapport a l'autre

Publications (1)

Publication Number Publication Date
EP2913532A1 true EP2913532A1 (de) 2015-09-02

Family

ID=51168026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15156030.7A Withdrawn EP2913532A1 (de) 2014-02-26 2015-02-20 Fluid-Umwälzpumpe, die aus zwei Untereinheiten besteht, von denen die eine von der anderen abnehmbar ist

Country Status (2)

Country Link
EP (1) EP2913532A1 (de)
FR (1) FR3017907B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3467316A1 (de) 2018-06-25 2019-04-10 Wilo Se Verfahren für das anlaufen einer zirkulationspumpe und zugehörige zirkulationspumpe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03286775A (ja) * 1990-04-02 1991-12-17 Terumo Corp 遠心ポンプ
US20050099773A1 (en) * 2002-04-10 2005-05-12 Siemens Aktiengesellschaft Cooling device for a motor vehicle having a cooling duct for a coolant
DE102007023779A1 (de) * 2007-05-22 2008-11-27 Wilo Ag Lagerträger aus Stahldrahtgestrick für eine Spaltrohrpumpe
JP2010090724A (ja) * 2008-10-03 2010-04-22 Mitsubishi Electric Corp ポンプ及びポンプの製造方法及びヒートポンプ式給湯装置
DE102011119625A1 (de) * 2011-11-29 2013-05-29 Wilo Se Nassläufer-Motorpumpe
DE102011119626A1 (de) * 2011-11-29 2013-05-29 Wilo Se Nassläufer-Motorpumpe
EP2674624A1 (de) * 2011-02-10 2013-12-18 MITSUBISHI HEAVY INDUSTRIES, Ltd. Pumpenkonfiguration

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4901838B2 (ja) * 2008-10-29 2012-03-21 三菱電機株式会社 ポンプ及びヒートポンプ式給湯装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03286775A (ja) * 1990-04-02 1991-12-17 Terumo Corp 遠心ポンプ
US20050099773A1 (en) * 2002-04-10 2005-05-12 Siemens Aktiengesellschaft Cooling device for a motor vehicle having a cooling duct for a coolant
DE102007023779A1 (de) * 2007-05-22 2008-11-27 Wilo Ag Lagerträger aus Stahldrahtgestrick für eine Spaltrohrpumpe
JP2010090724A (ja) * 2008-10-03 2010-04-22 Mitsubishi Electric Corp ポンプ及びポンプの製造方法及びヒートポンプ式給湯装置
EP2674624A1 (de) * 2011-02-10 2013-12-18 MITSUBISHI HEAVY INDUSTRIES, Ltd. Pumpenkonfiguration
DE102011119625A1 (de) * 2011-11-29 2013-05-29 Wilo Se Nassläufer-Motorpumpe
DE102011119626A1 (de) * 2011-11-29 2013-05-29 Wilo Se Nassläufer-Motorpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3467316A1 (de) 2018-06-25 2019-04-10 Wilo Se Verfahren für das anlaufen einer zirkulationspumpe und zugehörige zirkulationspumpe

Also Published As

Publication number Publication date
FR3017907B1 (fr) 2019-01-25
FR3017907A1 (fr) 2015-08-28

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