EP3540233A1 - Groupe pompe centrifuge avec valve rotative - Google Patents

Groupe pompe centrifuge avec valve rotative Download PDF

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Publication number
EP3540233A1
EP3540233A1 EP18161524.6A EP18161524A EP3540233A1 EP 3540233 A1 EP3540233 A1 EP 3540233A1 EP 18161524 A EP18161524 A EP 18161524A EP 3540233 A1 EP3540233 A1 EP 3540233A1
Authority
EP
European Patent Office
Prior art keywords
valve element
centrifugal pump
pump housing
impeller
annular wall
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Withdrawn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
EP18161524.6A
Other languages
German (de)
English (en)
Inventor
Thomas Blad
Christian BLAD
Peter Mønster
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 Holdings AS
Original Assignee
Grundfos Holdings 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 Holdings AS filed Critical Grundfos Holdings AS
Priority to EP18161524.6A priority Critical patent/EP3540233A1/fr
Priority to EP19710408.6A priority patent/EP3765747A1/fr
Priority to PCT/EP2019/056079 priority patent/WO2019175133A1/fr
Priority to US16/980,057 priority patent/US11460031B2/en
Priority to CN201980019022.3A priority patent/CN111919029B/zh
Publication of EP3540233A1 publication Critical patent/EP3540233A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04D13/02—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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/48—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
    • F04D29/486—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible 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
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/501—Elasticity

Definitions

  • the invention relates to a centrifugal pump unit with a arranged in a pump housing of the centrifugal pump assembly valve element.
  • Centrifugal pump units usually have at least one impeller, which is driven by an electric drive motor.
  • the impeller rotates in a pump housing so that it can convey fluid from a suction port to at least one pressure port.
  • centrifugal pump units are known, in which a valve element is integrated in the pump housing. About such a valve element, the flow can be selectively directed to one of two pressure ports, depending on the switching position in which the valve element is located.
  • the centrifugal pump unit has an electric drive motor which rotatably drives at least one impeller of the centrifugal pump assembly.
  • the electric drive motor may preferably be a canned motor or a wet-running electric drive motor.
  • the impeller is in one arranged surrounding the impeller pump housing.
  • the pump housing has a suction port which communicates with a suction port of the impeller.
  • the pump housing has at least two pressure connections. The two pressure ports can serve, for example, to direct the flow generated by the impeller either in two different circuits of a heating system, for example in a heating circuit or a heat exchanger for domestic water heating.
  • a rotatable valve element is arranged, which is movable between at least two switching positions in which the flow paths through the at least two pressure ports are opened differently wide. Particularly preferably, in a first switching position, a flow path is opened by a first pressure port, while a flow path is closed by the second pressure port. Accordingly, preferably in a second switching position, the flow path is closed by the first pressure port and the flow path is opened by the second pressure port.
  • the valve element can serve as a changeover valve.
  • the valve element according to the invention comprises an annular wall surrounding the impeller, in which at least one switching opening is formed. This switch opening can be brought into different positions or switching positions by rotation of the valve element in order to open the flow paths differently in the manner described above.
  • the valve element is rotatably mounted in the interior of the pump housing about an axis of rotation concentric with the annular wall.
  • the annular wall in the surrounding area of the impeller has the advantage that it can simultaneously serve the flow guidance. Further, a flow generated by the impeller may act directly on the annular wall to rotate the valve member about the axis of rotation in response to the flow. So can the from the impeller generated flow can be used to move the valve element from one switching position to another switching position.
  • At least one, preferably two outlet openings connected to the pressure connections are located in a wall of the pump housing facing the annular wall, with which the at least one switching opening can be brought into overlap at least partially, depending on the switching position of the valve element.
  • a switching opening can optionally be brought into coincidence with one of two outlet openings in order to realize a switching function between the two outlet openings by rotation of the valve element.
  • a change in flow can also be achieved in that the switching opening is overlapped to different degrees with at least one outlet opening.
  • the valve element in the interior of the annular wall on a transverse to the axis of rotation extending wall, which preferably surrounds a suction port of the impeller.
  • This wall thus forms a bottom surface inside the annular wall.
  • the wall can in particular produce the connection of the annular wall to a mounting of the valve element.
  • the wall can serve as a contact surface for a flow generated by the impeller, so that the flow can rotate the valve element between the switching positions.
  • the wall is further preferably designed as an annular surface which surrounds the suction mouth of the impeller in an annular manner.
  • the suction mouth is preferably located centrally in the wall. Thus, more preferably, this wall separating the suction side and the pressure side in the interior of the pump housing from each other.
  • the annular wall has a circular outer contour and particularly preferably a cylindrical or conical outer contour.
  • This embodiment has the advantage that the annular wall can preferably move at a constant distance parallel to an inner wall of the pump housing upon rotation of the valve element.
  • valve element is rotatably mounted on a stationary component in the interior of the pump housing.
  • This fixed component may be integrally formed with the pump housing or rotatably attached thereto. This creates an independent bearing for the valve element.
  • the at least one switching opening is completely surrounded by at least a portion of the annular wall at its edge. That the switching opening is formed as a hole or as an opening in the annular wall.
  • a sealing or contact surface can be created in the peripheral region of the switching opening.
  • the annular wall may have at its free end a continuous closed edge, which can be brought to seal against a wall of the pump housing to the plant.
  • the free end of the annular wall is preferably that axial end which faces away from that end on which the wall extending transversely to the axis of rotation faces away.
  • the annular wall extends in an extension direction transversely to its circumference at an angle of less than 90 ° and preferably less than 45 ° to the axis of rotation of the valve element. This results in a cylindrical or preferably conical shape of the annular wall.
  • Such a form has the advantage that at least sections the annular wall can be brought to seal well with an inner wall of the pump housing to the plant.
  • the valve element has at least one movable portion which is movable between an adjacent position in which the portion of a contact surface in the pump housing, in particular frictionally engaged, and a released position in which the portion in the Rotation of the valve element is movable relative to the contact surface.
  • the at least one movable section of the valve element and the contact surface can thus act as a coupling which serves to hold the valve element in an achieved switching position.
  • the movement of the at least one movable portion of the valve element is preferably carried out by the fluid pressure generated by the impeller.
  • a pressure-dependent engageable and releasable coupling can be created, which can be brought depending on the operating conditions of the drive motor solely by the pressure build-up in the pump housing engaged and released again.
  • the system between the valve element and the abutment surface can be achieved only frictionally or optionally additionally positively by arranged on the valve element and / or the contact surface engagement elements.
  • In order to rotate the valve element from one switching position to another switching position it is first brought into its released position, which is preferably done by reducing the pressure in the pump housing or in the surrounding the impeller pressure chamber. Such a pressure reduction can be achieved by reducing the speed of the drive motor or switching off the drive motor.
  • the at least one movable portion may be formed as an elastic edge portion of the annular wall. More preferably, the entire ring wall is elastic, so that it can preferably be deflected radially outward by a pressure prevailing in the interior of the annular wall. By an elastic configuration of the wall portion while restoring forces can be generated, which preferably move the movable portion automatically back to its original position when the applied pressure is eliminated.
  • the entire valve element can be movable in a direction transverse to its direction of rotation, preferably parallel to its axis of rotation, between a released and an adjacent position.
  • the direction of movement of the valve element between the dissolved and the adjacent position is thus a different direction of movement than the direction of movement in which the valve element is moved between the switching positions.
  • a movement between the switching positions can be achieved independently of the fixation of the valve element.
  • the valve element is preferably mounted axially displaceably on the axis of rotation.
  • valve element and the pump housing are configured such that in the adjacent position at least a portion of the valve element rests against an inner wall of the pump housing.
  • the inner wall of the pump housing forms a contact surface and, together with the portion of the valve element, the coupling described above.
  • Such a coupling can be realized in this way with very few components. There are essentially no additional components to the valve element and the already existing pump housing required.
  • the valve element is configured and arranged such that a prevailing in the peripheral region of the impeller pressure so acts on the valve element that the at least one movable portion or the entire valve element is moved to the applied position. More preferably, the pressure prevailing in the peripheral region of the impeller so holds the valve element in fixed contact with a contact surface, in particular an inner wall of the pump housing. Thus, the valve element is held by the pressure in the peripheral region of the impeller in its adjacent position and thus fixed in the achieved switching position. The pressure in the peripheral region of the impeller is generated by the rotation of the impeller of this.
  • the described coupling which is formed by the at least one portion of the valve element or a conversion of the valve element with a contact surface, can thus be brought into engagement by the pump unit without further adjusting means.
  • a clutch is provided which can be engaged and disengaged solely by driving the drive motor.
  • a force generating means is preferably provided, particularly preferably in the form of a spring, which acts on the valve element or its at least one movable portion from the adjacent position in the direction of the released position with force. It is thereby achieved that the valve element or its at least one movable section, when the pressure in the pressure chamber on the output side of the impeller falls below a predetermined value, automatically moves back into its initial or rest position corresponding to the released position.
  • a clutch is provided which automatically or jostätig disengaged when the pressure drops. That is, by increasing the pressure in the pressure chamber, the clutch can be moved into its abutting position or in engagement. By reducing the pressure, it can be released again.
  • control of the drive motor and / or the design of the drive motor and the force generating means are coordinated so that at a certain speed of the drive motor or a certain output pressure, the force of the force generating means is overcome to bring the valve element or its at least one movable portion in the applied position.
  • the force generating means is preferably dimensioned so that it reliably moves the valve element or its movable portion back into the released position falls below a certain speed or a certain output pressure.
  • the invention may be located on the inner circumference of the annular wall leading to the at least one switching opening, more preferably spirally formed flow guide element.
  • the outlet leading spiral channel can be created, which preferably rotates together with the valve element when it is moved between its switching positions. This ensures optimum flow guidance to the outlet, regardless of which switching position the valve element is in.
  • the valve element is designed as a molded part made of metal or plastic, in particular as an injection molded part made of plastic. This allows a cost-effective production and at the same time the possibility of being able to form complex geometries, such as a flow guide in the valve element in a simple manner.
  • the valve element has in its center a bearing sleeve which rotatably slides on a fixed bearing pin in the pump housing.
  • the bearing pin may be formed integrally with the pump housing or a separate component fixed in the pump housing be.
  • the bearing sleeve is preferably formed integrally with the remaining portions of the valve element.
  • the bearing sleeve is formed so that between the bearing sleeve and the bearing pin a closed storage space is formed, so that in this a permanent lubrication or prelubrication can be provided, whereby a smooth running of the rotational movement of the valve element is ensured on the bearing pin.
  • a lubrication of the storage may be provided by the pumped fluid, wherein the bearing gap between the bearing sleeve and the bearing pin is preferably protected against penetrating contaminants to ensure a permanent ease.
  • the valve element can be rotatably mounted on an inlet pipe arranged in the pump housing and in engagement with a suction mouth of the rotor wheel.
  • an annular bearing surface is created, which surrounds the suction mouth.
  • a return element may be provided, which acts on the valve element in its direction of rotation.
  • the restoring element is preferably designed so that it moves the valve element in a predetermined starting position at standstill of the impeller, which preferably corresponds to one of the possible switching positions.
  • a return element can be formed for example by a spring or a magnetically acting return element be.
  • the valve element is designed such that it causes a return movement by gravity, that is, the return element is designed as a weight, which is preferably arranged eccentrically in the valve element, so that the weight on the valve element exerts a torque when the valve element from his Starting position is deflected.
  • centrifugal pump units as used for example as Bankungsum cilantrolzpumpenaggregate, usually have a defined mounting position, in which the shaft of the drive motor is horizontal, so a defined starting position can be ensured, in which the weight is in a lower of at least two possible positions.
  • the weight is increased, as long as the flow to the valve element sufficient force is applied. If this force falls away, gravity moves the valve element back to its original position.
  • the centrifugal pump units described below are provided as Bankungsumicalzpumpenaggregate especially for use in a heating system, such as a compact heating system, which serves both the heating of a building and the heating of process water.
  • the centrifugal pump unit according to the first embodiment of the invention has an electric drive motor 2, which is arranged in a motor housing 4.
  • the motor housing 4 is connected to a pump housing 6.
  • An electronics housing 8, which contains the electrical or electronic components for controlling and / or regulating the drive motor 2, is disposed on the axial end of the motor housing 4 facing away from the pump housing 6.
  • the electric drive motor 2 is a wet-running electric drive motor.
  • stator space in which the stator 10 is disposed is separated from a rotor space in which the rotor 12 is disposed by a split pot 14.
  • the rotor 12 thus rotates in the liquid to be conveyed.
  • the rotor 12 drives via a rotor shaft 16 in a known manner an impeller 18 at.
  • the impeller is arranged in the pump housing 6.
  • the pump housing 6 has a suction port 20 and two pressure ports 22 and 24.
  • the suction port 20 opens at the bottom of the pump housing 6.
  • a suction nozzle or inlet nozzle 26 is arranged, which engages in the interior of a suction mouth 28 of the impeller 18.
  • a pot-shaped valve element 30 is arranged in the interior of the pump housing 6.
  • the valve element 30 has a circular outer contour and extends concentrically to the axis of rotation X of the drive motor 2 and the impeller 18.
  • the valve element 30 has on the outer circumference of an annular wall 32 which has a frusto-conical or conical outer contour and an outer contour which substantially with the inner contour of the pump housing 6 in the peripheral region of the axis of rotation X corresponds. At that axial end of the annular wall 32 with a larger diameter, the valve element 30 is fully opened. At the opposite axial diameter in the smaller axial end, the valve element 30 has a wall 34 which forms a bottom of the valve element 30.
  • the wall 34 extends transversely to the annular wall 30 and normal to the axis of rotation X.
  • the wall 34 forms an annular wall, which extends radially inwardly starting from the annular wall 32 and surrounds a central opening 36.
  • the inlet nozzle 26 extends through. That is, the valve element 30 is placed with the opening 36 on the inlet nozzle 26 and fixed there by an annular securing element 38.
  • the fixing element 38 engages from the inside into the opening 36 and is fixed on the inlet nozzle 26, for example by clamping.
  • the inlet nozzle 26 and the securing element 38 are designed such that that the valve element 30 is guided in the radial direction, in the axial direction parallel to the longitudinal axis X, however, allows a certain movement.
  • a spring in the form of a wave-shaped spring ring 42 is also arranged.
  • the spring acts in the axial direction in the direction of the longitudinal axis X and pushes the valve element 30 away from the shoulder 40 in the direction of the drive motor 2.
  • the annular wall 32 and the wall 34 spaced from the inner surface of the pump housing 6, so that the valve element 30 about the inlet nozzle 26, that is, about the longitudinal axis X in the interior of the pump housing can rotate substantially freely.
  • valve element 30 In this state, a rotating flow generated in the interior of the valve element 30 in the peripheral region of the impeller 18 due to the friction between the flow and the wall surfaces of the valve element 30 (inner surface of the annular wall 32 and wall 34), the valve element 30 are rotated.
  • the rotational movement is limited by a stop pin 44, which engages in the bottom of the pump housing 6 in an arcuate groove 46 which extends through an angle of 90 ° about the longitudinal axis X.
  • the switching opening 48 is formed in the circumferential annular wall 32. This is formed as a hole which is completely enclosed on its outer circumference by parts of the annular wall 32.
  • the switching opening 48 can be brought to an outlet opening 50, which is connected to the pressure port 22 to cover, so that a flow connection from the interior of the valve element 30 through the switching opening 48, the outlet opening 50 is made to the pressure port 22.
  • the switching opening 48 is brought into registry with an outlet opening 52 which is connected to the pressure port 24. That is, the pressure port 24 opens at the outlet opening 52 into the interior of the pump housing 6.
  • a switching valve is realized, with which, for example, a switching function, as shown by Fig. 3 is described, can be realized.
  • Fig. 3 schematically shows the circuit diagram of a heating system.
  • This heating system has a primary heat exchanger 54, for example a gas boiler.
  • a circulation pump unit 56 is arranged, which may be a centrifugal pump unit, as described above and below.
  • a valve device 58 is integrated, which may be formed by the described valve element 30. Via the valve device 58, the flow path between a heating circuit 60 for tempering a building and a secondary heat exchanger 62 for heating domestic water can be switched to supply either the heating circuit 60 or the secondary heat exchanger 62 with heated by the primary heat exchanger 54 heat transfer medium.
  • the switching or movement of the valve element 30 is realized by an electronic unit 8 arranged in the control electronics 64, which drives the drive motor 2.
  • the control electronics 64 may for this purpose in particular have a speed controller or frequency converter.
  • the fact is exploited that at rapid start-up of the drive motor 2 and the impeller 18 in the Circumferential area of the impeller builds up a pressure faster than an annular flow, which is adapted to rotate the valve element 30.
  • the valve element for example, in the in Fig. 4 shown first switching position is located, in which the flow path is opened by the pressure port 22 and the valve element 30 is to remain at the start of the drive motor in this switching position, the drive motor 30 is accelerated quickly, so quickly builds up a pressure inside the valve element 30 and this from the in Fig.
  • valve element 30 is secured against rotation.
  • the outside of the valve element 30 thus forms a detachable coupling with the inside of the pump housing 6.
  • valve element 30 returns to its adjacent position in frictional contact with the inner surface of the pump housing 6 in this switching position.
  • the drive motor in the direction of rotation B must be driven at such a speed that a flow for moving the valve element 30 but can build up no such high pressure, which is suitable, the spring force of the spring ring 42 to overcome.
  • Fig. 10 shows the first switching position with the valve element 30 in the adjacent position.
  • the switching opening 48 is opposite to the outlet opening 50.
  • Fig. 11 shows the second switching position, in which a part of the annular wall 32 of the outlet opening 50 opposite, so that it is closed.
  • the switching opening 48 of the outlet opening 52 opposite, while in the first switching position, as in Fig. 9 shown, a part of the annular wall 32 of the outlet opening 52 opposite and thus closes.
  • valve element 30 is in each case in its adjacent position, so that it rests against the inner wall of the pump housing 6 in the peripheral region of the outlet openings 50, 52 and, if the annular wall 32 covers the outlet opening 50, 52, can close tightly.
  • Fig. 12 to 14 show a second embodiment of a centrifugal pump assembly according to the invention, in which the valve element is different only in the nature of its storage from the valve element 30 described above. Only the differences from the first embodiment will be described below. Incidentally, reference is made to the preceding description.
  • the valve element 30 is rotatably mounted on a bearing pin or bearing pin 66.
  • the bearing bolt 66 extends in the axial direction of the longitudinal axis X from the bottom into the interior of the pump housing 6 in.
  • the valve element 30 has on its wall 34 an integrally formed suction port 68, which instead of the inlet port 46 with the suction port 28 of the impeller 18 engages.
  • a suction opening Inside the suction nozzle 68 is a suction opening in which a bearing sleeve 70 is held by connecting webs, wherein the bearing sleeve 70 is integrally formed with the remaining part of the valve element 30 '.
  • the bearing sleeve 70 is placed on the bearing pin 66, that is, rotates on the bearing pin 66.
  • the bearing pin 66 surrounding a spring 72 is also arranged in the form of a compression spring.
  • the spring 72 takes over the function of the spring ring 42 according to the first embodiment and generates a compressive force between the bottom of the pump housing 6 and the valve element 30 ', so that this in the in Fig. 14 shown dissolved position is pushed away from the inner wall of the pump housing 6 and can rotate freely.
  • the third embodiment according to 15 to 17 essentially corresponds to the second embodiment, so that only the differences will be described below. Incidentally, reference is made to the preceding description.
  • the valve element 30 " has inside a spiral flow guide 46, which forms a spiral channel toward the switching opening 48.
  • the flow guide 46 is formed as a spiral projection, which narrows towards the switching opening 48 in the radial direction, so that the clearance between the Flow guide 76 and the impeller 18 is increased so that a spiral widening Flow channel is created to the outlet opening 48 out.
  • the flow during operation in the direction of rotation A in the runs FIGS. 16 and 17 Since the flow guide 76 rotates between the switching positions together with the valve element 30 ", optimum flow guidance is always provided for each of the pressure ports 22 and 24. It should be understood that such a flow guide 76 is also used in the first two embodiments could be.
  • valve element 30 has a weight 78, which is arranged in a receptacle in the bottom or the wall 34 of the valve element 30".
  • the weight 78 is diametrically opposite the switching opening 48, so that it is in the in Fig. 16 shown first switch position is below.
  • the weight 78 serves as a return element, so that the drive motor 2 only has to be driven in one direction of rotation A.
  • To reset the valve element 30 " it is not necessary to generate an annular flow in the opposite direction inside the valve element 30". The reset is done by gravity as the weight 78 moves down. If the pump set is in the in Fig.
  • the drive motor 2 is driven or accelerated by the control electronics 64 so that immediately builds up such a high pressure that the spring force generated by the spring 72 by a pressure force in the interior of the valve element 30 "overcome That is, the valve element 30 "is pressed by the fluid pressure generated against the spring force of the spring 42 in abutment with the inner wall of the pump housing 6 so that it is frictionally fixed there and remains in the first switching position shown.
  • the drive motor 2 is taken by the control electronics 64 accordingly slower in operation, so that initially an annular flow in the direction of Can build the direction of rotation A, which the valve element 30 "in the in Fig.
  • valve element 30, 30 ', 30 could be moved between a released and adjacent position.
  • the annular wall 32 could be designed to be elastic in order to be deformed by a fluid pressure prevailing in the interior and brought into abutment against an inner wall of the pump housing 6.
EP18161524.6A 2018-03-13 2018-03-13 Groupe pompe centrifuge avec valve rotative Withdrawn EP3540233A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18161524.6A EP3540233A1 (fr) 2018-03-13 2018-03-13 Groupe pompe centrifuge avec valve rotative
EP19710408.6A EP3765747A1 (fr) 2018-03-13 2019-03-12 Ensemble pompe centrifuge
PCT/EP2019/056079 WO2019175133A1 (fr) 2018-03-13 2019-03-12 Ensemble pompe centrifuge
US16/980,057 US11460031B2 (en) 2018-03-13 2019-03-12 Centrifugal pump assembly
CN201980019022.3A CN111919029B (zh) 2018-03-13 2019-03-12 离心泵机组

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18161524.6A EP3540233A1 (fr) 2018-03-13 2018-03-13 Groupe pompe centrifuge avec valve rotative

Publications (1)

Publication Number Publication Date
EP3540233A1 true EP3540233A1 (fr) 2019-09-18

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP18161524.6A Withdrawn EP3540233A1 (fr) 2018-03-13 2018-03-13 Groupe pompe centrifuge avec valve rotative
EP19710408.6A Pending EP3765747A1 (fr) 2018-03-13 2019-03-12 Ensemble pompe centrifuge

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19710408.6A Pending EP3765747A1 (fr) 2018-03-13 2019-03-12 Ensemble pompe centrifuge

Country Status (4)

Country Link
US (1) US11460031B2 (fr)
EP (2) EP3540233A1 (fr)
CN (1) CN111919029B (fr)
WO (1) WO2019175133A1 (fr)

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EP3376051B1 (fr) * 2017-03-14 2022-08-24 Grundfos Holding A/S Groupe motopompe
USD1009081S1 (en) * 2021-05-31 2023-12-26 EKWB d.o.o. Pump
US11953018B2 (en) 2022-04-04 2024-04-09 Cooper-Standard Automotive Inc. Multi-switch pump assembly
US11852147B2 (en) 2022-04-04 2023-12-26 Cooper-Standard Automotive Inc. Multifunctional pump assembly
US20230407871A1 (en) * 2022-05-26 2023-12-21 Cooper-Standard Automotive Inc Pump with rotary valve and fluid submersible motor
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WO2019175133A1 (fr) 2019-09-19
CN111919029B (zh) 2022-04-29
CN111919029A (zh) 2020-11-10
US20210003133A1 (en) 2021-01-07
EP3765747A1 (fr) 2021-01-20
US11460031B2 (en) 2022-10-04

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