EP4390138A1 - Pompe centrifuge et procédé de fabrication d'une pompe centrifuge - Google Patents

Pompe centrifuge et procédé de fabrication d'une pompe centrifuge Download PDF

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Publication number
EP4390138A1
EP4390138A1 EP23213018.7A EP23213018A EP4390138A1 EP 4390138 A1 EP4390138 A1 EP 4390138A1 EP 23213018 A EP23213018 A EP 23213018A EP 4390138 A1 EP4390138 A1 EP 4390138A1
Authority
EP
European Patent Office
Prior art keywords
housing
fastening
pump
motor housing
centrifugal pump
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.)
Pending
Application number
EP23213018.7A
Other languages
German (de)
English (en)
Inventor
Stephan Karns
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 SE
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 SE filed Critical Wilo SE
Publication of EP4390138A1 publication Critical patent/EP4390138A1/fr
Pending 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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/31—Retaining bolts or nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • the invention relates to a centrifugal pump comprising a pump housing, a motor housing placed on the pump housing and defining a longitudinal axis, and a plurality of fastening means.
  • the invention further relates to a method for producing a centrifugal pump with the step of placing a motor housing on a pump housing.
  • Centrifugal pumps are known from the prior art and are used to pump a fluid by means of a rotary movement of an impeller provided in a pump housing of the centrifugal pump.
  • the impeller is driven by a motor of the centrifugal pump by means of a rotor shaft.
  • the motor is typically provided in a motor housing, which is placed on the pump housing and is fixed to it by means of four screws provided at a distance of 90°.
  • a terminal box and/or an electronics housing with a control arranged therein is usually provided, with the terminal box and/or the electronics housing being placed on the motor housing.
  • the alignment of the motor housing including the terminal box and/or the electronics housing can be adapted to different installation situations using the screws, only four defined alignments are possible due to the screws being spaced 90° apart. Furthermore, it is generally not possible to rotate the motor housing including the terminal box and/or the electronics housing when the centrifugal pump is installed without emptying a pipe system connected to the centrifugal pump.
  • centrifugal pump in particular a heating circulation pump
  • a corresponding method for producing a centrifugal pump in which the motor housing can also be removed without emptying a pipe system supplied by the centrifugal pump and/or in the installed state of the centrifugal pump.
  • the motor housing can be fixed to the pump housing in any rotational position.
  • the motor housing can be rotated in relation to the pump housing during operation without emptying a pipe system connected to the centrifugal pump.
  • the motor housing can only be fixed to the pump housing in four defined orientations and must be completely detached from the pump housing for re-orientation.
  • different installation situations often require the motor housing to be aligned in relation to the pump housing, for example due to existing piping, in none of these four predefined orientations.
  • the proposed solution is satisfactory. a long-standing need to obtain a flexible rotational arrangement of the motor housing and to facilitate installation for an installer.
  • a centrifugal pump is generally a fluid machine that uses rotary motion and dynamic forces to pump liquids, mainly as a fluid.
  • centrifugal force occurring in radial flow is used for pumping, so that centrifugal pumps are also called centrifugal pumps.
  • the motor housing is preferably arranged above the pump housing and/or is fixed to it.
  • the fluid preferably comprises water or another liquid medium such as a glycol-water mixture.
  • the centrifugal pump is preferably designed as a heating circulation pump.
  • the pump housing can be designed as known from the prior art, for example with two opposite connections for the piping, whereby normals of the connections can extend orthogonally to the longitudinal axis of the motor housing.
  • the normals of the connections extend identically, so that the pump housing is designed as a so-called in-line pump housing.
  • an impeller is provided in the pump housing, which is driven by a
  • a motor shaft can be provided for the motor and the impeller.
  • the design of the motor, the impeller and/or the motor shaft can be as known from the prior art.
  • the motor housing is preferably open on the side that is placed on the pump housing. It is also possible for the motor housing to be self-contained and for the motor shaft to protrude from the motor housing into the pump housing.
  • Fixed in place on the pump housing means in particular that the motor housing cannot rotate relative to the pump housing. Any rotary position means in particular that the motor housing can be placed on the pump housing in any rotary position relative to the pump housing and can be fixed in place on the pump housing in this position.
  • a seal is preferably provided between the motor housing and the pump housing, in particular in order to be able to rotate the motor housing when the pipe system is filled with pressure.
  • the seal can be designed as an O-ring and/or inserted into the motor housing and/or the pump housing, for example in a circumferential groove of the end of the motor housing facing the pump housing and/or in a corresponding surface of the pump housing.
  • the seal can be fixedly connected to the motor housing and/or the pump housing and/or formed on the motor housing and/or the pump housing.
  • the seal can be cast and/or injection-molded from a suitable material directly onto a corresponding housing part of the motor housing and/or the pump housing.
  • the motor housing and/or the pump housing can be made of gray cast iron, plastic and/or a composite material.
  • the fastening collar is designed in the form of a disk.
  • the fastening collar preferably extends radially from the axially extending base body of the motor housing, in particular from a lateral surface of the motor housing.
  • the motor housing preferably has a circular, in particular a circular, inner and/or outer diameter.
  • a quarter-circle-shaped Rounding can be provided as a transition.
  • recesses extending radially inwards can be incorporated into the rounding to make it easier to install the fastening means.
  • Thickenings extending radially outwards can also be provided in the rounding to improve the stability between the fastening collar and the base body of the motor housing.
  • the motor housing is designed like a pot with a radially extending opening and/or the fastening collar extends radially away from the opening, enclosing the opening all the way around.
  • the fastening collar preferably has a circular outer circumference in plan view and/or the opening is circular.
  • An end face of the motor housing opposite the opening can be closed or have passages for connecting cables of the motor.
  • the fastening means are designed as screws, in particular as cylinder head screws, which are screwed into the pump housing for stationary fixing.
  • the screws have a screw head by which the fastening collar is held axially.
  • the fastening means clamp the fastening collar preferably in the axial direction against the pump housing.
  • the screws can be designed with a flat top, with a hemispherical top, with a flat spherical, lens-shaped top, with a cylindrical edge, a conical edge or another edge as a screw head for axial fixing of the fastening collar.
  • the fastening means extend parallel to the longitudinal axis.
  • 2, 4, 6, 8 or 10 fastening means are provided, which are arranged in particular at regular intervals from one another, and/or wherein the fastening means radially enclose the fastening collar.
  • two fastening means are provided on each of the four sides of the pump housing.
  • other fastening means are also possible. conceivable, which are designed in particular to be detachable for rotating the motor housing.
  • an electronics housing and/or a terminal box is provided, which is arranged in a fixed position on the motor housing, in particular at an end of the motor housing facing away from the pump housing.
  • a control and/or electronics for controlling the motor can be provided in the electronics housing.
  • Terminals for connecting the motor are preferably provided in the terminal box.
  • Such terminals can also be provided in the electronics housing.
  • the electronics housing and/or the terminal box is preferably designed to be closed off from the motor housing, with a cable feedthrough expediently being provided between the electronics housing and/or the terminal box and the motor housing.
  • the electronics housing and/or the terminal box can basically have any shape, for example be designed like a pot and be arranged in an axial extension of the motor housing.
  • the electronics housing and/or the terminal box can also have a cuboid shape, which in terms of its longitudinal extension can extend, for example, orthogonally to the longitudinal axis of the motor housing.
  • the fastening means press the fastening collar axially onto the pump housing.
  • the fastening means preferably encompass the fastening collar, in particular axially and/or on a radial outer edge of the fastening collar.
  • the axial contact force can be applied by screwing a screw as a fastening means into the pump housing.
  • the centrifugal pump has a fastening disc, wherein the fastening collar is provided axially between the fastening disc and the pump housing and the fastening means fix the fastening disc to the pump housing in a fixed position.
  • the fastening disc enables the axial contact pressure applied by the fastening means to be better distributed.
  • a more reliable fastening can be achieved with such a fastening disc.
  • the fastening disc preferably has an opening which the motor housing surrounds radially all the way around.
  • the fastening disc rests in contact with the fastening collar, in particular at least on an outer radial edge of the fastening collar.
  • the fastening disk preferably has a circular opening that corresponds to an outer diameter of the motor housing, particularly in the area of the fastening collar.
  • the fastening disk can have a circular or rectangular outer shape.
  • a fastening opening, for example a hole, is preferably made in the fastening disk for each fastening means, through which the fastening means is introduced into the pump housing.
  • the screw head preferably rests axially on the fastening disk in order to fix it relative to the pump housing.
  • the fastening disk surrounds the motor housing radially.
  • the fastening disk preferably rests against the motor housing in an axial and/or radial manner, wherein an assembly gap can be provided in the radial direction.
  • the motor housing can be placed on the pump housing so that it can rotate through 360°. This means that the motor housing, when the fastening means are released, can be rotated about its axis in relation to the pump housing and, after such a rotation, can be fixed in place on the pump housing in the new rotational position.
  • the fixing preferably comprises a possibility for removing the fixing, for example in the form of a screw as a fastening means which can be screwed into the pump housing.
  • the fastening means are preferably not completely fixed to the pump housing.
  • Fig.1 shows a centrifugal pump having a pump housing 2 with a motor housing 3 placed on the pump housing 2 in any rotational position in a perspective view according to a preferred embodiment of the invention.
  • the pump housing 2 is designed in the manner of an in-line housing with opposite connections 4, wherein an impeller (not shown in the figures) for conveying a fluid is arranged in the pump housing 2.
  • the impeller is driven in a conventional manner by means of a motor provided in the motor housing 3, not shown in the figures.
  • the pump housing 2 and/or the motor housing 3 can be made of gray cast iron, plastic or a composite material.
  • the motor housing 3 is pot-shaped, forming a longitudinal axis 5, and accordingly has a circular inner and outer diameter.
  • the longitudinal axis 5 of the motor housing 3 runs orthogonal to the normal or longitudinal extension of the connections 4.
  • the pot-shaped motor housing forms an opening, the surface of which extends orthogonal to the longitudinal axis 5 of the motor housing 3.
  • the opening is radially enclosed by a ring-like fastening collar 6, which extends all the way around the opening and rests in contact with the motor housing 2.
  • a seal (not shown) is provided between the fastening collar 6 and the motor housing 2.
  • the fastening collar 6 is designed like a disk, with an outer radial edge of the fastening collar 5 extending axially in the direction of the longitudinal axis 5 of the motor housing 3. Accordingly, the fastening collar 6 rests on the motor housing 2 with a radial surface.
  • the fastening collar 6 is designed as one piece with the cup-shaped remainder 7 of the motor housing 3.
  • the circular outer diameter of the cup-shaped remainder 7 increases towards the fastening collar 6, so that in side view a transition 8 from the fastening collar 6 to the cup-shaped remainder 7 is designed like a quarter circle.
  • the motor housing 3 is fixed to the pump housing 2 by means of four fastening means 9.
  • the fastening means 9 are designed as cylinder head screws or, as shown in the figures, as round head screws with an Allen or Phillips slot. Screws with a flat-spherical and/or lens-shaped top, a hemispherical top, a flat top or other screws with a top or screw head 10 that protrudes radially beyond the thread can also be used.
  • the round head screws are screwed into the pump housing 2 in the direction of the longitudinal axis 5 in such a way that the screw head 10 axially encloses the fastening collar 6 and thus presses it axially against the motor housing 3.
  • fastening means 9 which are provided at regular intervals, namely at intervals of 90° around the motor housing 3, enclosing it all the way around.
  • 2, 3, 5, 6, 8, 10 or another number of fastening means 9 can be provided, which are preferably arranged at regular intervals.
  • alternating radially extending material recesses 11 and material thickenings 12 are introduced into the transition 8.
  • the motor housing 3 which is placed axially onto the pump housing 2, can be fixed in any rotational position.
  • the fastening means 9 or the cylinder head screws can be loosened, for example by a few turns, so that the motor housing 3 is still connected to the pump housing 2 but is not fixed in place thereto.
  • the fastening means 9 or the cylinder head screws can be fixed again, for example by screwing them in, in order to fasten the fastening collar 6 axially non-rotatably to the motor housing 3 again.
  • Fig.3 shows the centrifugal pump 1 of the Fig.1 with an electronics housing 14 placed on the motor housing 3 in the extension of the longitudinal axis 5 in a perspective view according to the preferred embodiment of the invention.
  • the motor housing 3 is provided between the pump housing 2 and the electronics housing 14, particularly with respect to the longitudinal axis 5.
  • an electronics and/or control (not shown) for controlling the motor of the centrifugal pump 1 is provided.
  • the electronics housing 14 can be designed as a terminal box in which connection terminals are provided for connecting the motor.
  • the electronics housing 14 is connected in a fixed position to the motor housing 3, for example screwed onto the motor housing 3 or locked into place with it. If the motor housing 3 is rotated relative to the pump housing 2 as described above, the electronics housing 14 also rotates.
  • Fig.4 shows the centrifugal pump 1 of the Fig.1 with a fastening disk 13 placed on the motor housing 3 in a perspective view according to the preferred embodiment of the invention.
  • the fastening disk 13, better visible in the perspective exploded view in Fig.5 of the centrifugal pump 1 according to the Fig.4 is disk-shaped and has a circular opening which corresponds to an outer diameter of the motor housing 3 in the region of the fastening collar 6.
  • the fastening disk 13 projects radially beyond the fastening collar 6 in the region of the circular opening, while an outer radial edge has a rectangular shape in plan view, at the four corners of which holes 15 are provided for the fastening means 9 or the cylinder head screws.
  • the motor housing 3 is placed on the pump housing 2 in any rotational position as before.
  • the fastening disk 13 is then placed axially on the motor housing 3 in such a way that the fastening disk 13 comes to rest on a side of the fastening collar 6 facing away from the pump housing 2.
  • the fastening means 9 or the cylinder head screws are then guided through the holes 15 and screwed to the pump housing 2 in order to fix the motor housing 3 in place on the pump housing 2.
  • the fastening collar 6 is thus provided axially between the fastening disk 13 and the pump housing 2.
  • the fastening means 9 or the cylinder head screws can be loosened but not removed as described above, so that the motor housing 3 continues to be held on the pump housing 2 by means of the fastening disk 13. After rotating the motor housing 3 into any rotational position, the fastening means 9 or the cylinder head screws are tightened again in order to fix the motor housing 3 in place on the pump housing 2 in the new rotational position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP23213018.7A 2022-12-20 2023-11-29 Pompe centrifuge et procédé de fabrication d'une pompe centrifuge Pending EP4390138A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE20226047A BE1031161B1 (de) 2022-12-20 2022-12-20 Kreiselpumpe und Verfahren zum Herstellen einer Kreiselpumpe

Publications (1)

Publication Number Publication Date
EP4390138A1 true EP4390138A1 (fr) 2024-06-26

Family

ID=86095932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23213018.7A Pending EP4390138A1 (fr) 2022-12-20 2023-11-29 Pompe centrifuge et procédé de fabrication d'une pompe centrifuge

Country Status (3)

Country Link
EP (1) EP4390138A1 (fr)
CN (1) CN221170035U (fr)
BE (1) BE1031161B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469102A1 (fr) * 2010-12-22 2012-06-27 Pierburg Pump Technology GmbH Pompe à moyen de refroidissement pour véhicule automobile
EP2818721A1 (fr) * 2013-06-24 2014-12-31 Grundfos Holding A/S Pompe centrifuge
WO2015082462A1 (fr) * 2013-12-04 2015-06-11 Robert Bosch Gmbh Moteur électrique pourvu d'une première et d'une deuxième partie de carter
EP2927491A1 (fr) * 2014-03-04 2015-10-07 Wilo Salmson France Pompe de circulation de fluide munie d'un moteur comportant deux parties montees libres en rotation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469102A1 (fr) * 2010-12-22 2012-06-27 Pierburg Pump Technology GmbH Pompe à moyen de refroidissement pour véhicule automobile
EP2818721A1 (fr) * 2013-06-24 2014-12-31 Grundfos Holding A/S Pompe centrifuge
WO2015082462A1 (fr) * 2013-12-04 2015-06-11 Robert Bosch Gmbh Moteur électrique pourvu d'une première et d'une deuxième partie de carter
EP2927491A1 (fr) * 2014-03-04 2015-10-07 Wilo Salmson France Pompe de circulation de fluide munie d'un moteur comportant deux parties montees libres en rotation

Also Published As

Publication number Publication date
CN221170035U (zh) 2024-06-18
BE1031161B1 (de) 2024-07-15
BE1031161A1 (de) 2024-07-12

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