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EP3765747B1 - Groupe pompe centrifuge avec valve rotative - Google Patents

Groupe pompe centrifuge avec valve rotative

Info

Publication number
EP3765747B1
EP3765747B1 EP19710408.6A EP19710408A EP3765747B1 EP 3765747 B1 EP3765747 B1 EP 3765747B1 EP 19710408 A EP19710408 A EP 19710408A EP 3765747 B1 EP3765747 B1 EP 3765747B1
Authority
EP
European Patent Office
Prior art keywords
valve element
pump housing
impeller
centrifugal pump
pump assembly
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
EP19710408.6A
Other languages
German (de)
English (en)
Other versions
EP3765747A1 (fr
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
Publication of EP3765747A1 publication Critical patent/EP3765747A1/fr
Application granted granted Critical
Publication of EP3765747B1 publication Critical patent/EP3765747B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 valve element arranged in a pump housing of the centrifugal pump unit.
  • Centrifugal pump units typically have at least one impeller driven by an electric motor.
  • the impeller rotates within a pump housing, enabling it to pump fluid from a suction port to at least one discharge port.
  • Centrifugal pump units are also known in which a valve element is integrated into the pump housing. This valve element allows the flow to be selectively directed to one of two discharge ports, depending on its position.
  • US 2004/0173249 A1 Disclosing a pump unit for a dishwasher, which includes a valve element surrounding the pump impeller. The valve element is rotatable between two switching positions by a motor. The valve element also has movable sealing surfaces which can be brought into contact with the openings to be sealed by the fluid pressure generated by the impeller.
  • the object of the invention is to improve the valve assembly in such a centrifugal pump unit with regard to function and design. This object is achieved by a centrifugal pump unit with the features specified in claim 1. Preferred embodiments are described in the dependent claims, the following description, and the accompanying figures.
  • the centrifugal pump assembly comprises an electric drive motor which rotates at least one impeller of the centrifugal pump assembly.
  • the electric drive motor can preferably be a canned motor or a wet-running electric drive motor.
  • the impeller is in The pump housing surrounds the impeller.
  • the pump housing has a suction port which is connected to a suction inlet of the impeller.
  • the pump housing has at least two pressure ports. These two pressure ports can, for example, serve to selectively direct the flow generated by the impeller into two different circuits of a heating system, such as a heating circuit or a heat exchanger for domestic hot water heating.
  • a rotatable valve element is arranged in the pump housing, which is movable between at least two switching positions in which the flow paths through the at least two pressure ports are open to different degrees. Particularly preferably, in a first switching position, a flow path through a first pressure port is open, while a flow path through the second pressure port is closed. Correspondingly, preferably in a second switching position, the flow path through the first pressure port is closed and the flow path through the second pressure port is open. In this way, the valve element can function as a diverter valve.
  • the valve element has an annular wall surrounding the impeller, in which at least one switching opening is formed.
  • This switching opening can be moved into different positions or switching states by rotating the valve element in order to open the flow paths differently as described above.
  • the valve element is rotatably mounted inside the pump housing about an axis of rotation concentric with the annular wall.
  • the annular wall in the area surrounding the impeller has the advantage that it can simultaneously serve to guide the flow.
  • a flow generated by the impeller can act directly on the annular wall to rotate the valve element about the axis of rotation depending on the flow. In this way, the flow generated by the impeller can be adjusted. The generated flow is used to move the valve element from one switching position to another.
  • At least one, preferably two, outlet openings connected to the pressure ports are located in a wall of the pump housing facing the annular wall. These outlet openings can be at least partially overlapped with the at least one switching opening, depending on the switching position of the valve element. Particularly preferably, a switching opening can be selectively overlapped with one of the two outlet openings to implement a switching function between the two outlet openings by rotating the valve element. Alternatively or additionally, a change in flow rate can also be achieved by overlapping the switching opening with at least one outlet opening to varying degrees.
  • the valve element has a wall extending transversely to the axis of rotation inside the annular wall, which preferably surrounds a suction inlet of the impeller.
  • This wall thus forms a base surface inside the annular wall.
  • the wall can, in particular, connect the annular wall to a bearing for the valve element.
  • the wall can serve as a surface for the flow generated by the impeller, so that the flow can rotate the valve element between its switching positions.
  • the wall is more preferably designed as an annular surface that surrounds the suction inlet of the impeller in a ring-like fashion.
  • the suction inlet is preferably located centrally in the wall. This wall can thus more preferably separate the suction side and the pressure side inside the pump housing.
  • the ring wall preferably has a circular outer contour, and particularly preferably a cylindrical or conical outer contour. This design has the advantage that, when the valve element rotates, the ring wall can preferably move at a constant distance parallel to an inner wall of the pump housing.
  • valve element is rotatably mounted on a fixed component inside the pump housing.
  • This fixed component can be formed integrally with the pump housing or be fixed to it in a rotationally rigid manner. This creates an independent mounting for the valve element.
  • the at least one switching opening is completely surrounded at its edge by at least one section of the ring wall. That is, the switching opening is designed as a hole or opening in the ring wall. Because the switching opening is surrounded by a preferably closed edge, a sealing or contact surface can be created in the circumferential region of the switching opening. Furthermore, the ring wall can have a continuous closed edge at its free end, which can be brought into contact with a wall of the pump housing for sealing purposes. The free end of the ring wall is preferably the axial end that faces away from the end where the wall extending transversely to the axis of rotation is located.
  • the ring wall extends in a direction transverse to its circumference at an angle of less than 90° and preferably less than 45° to the axis of rotation of the valve element.
  • Such a shape has the advantage that at least sections The ring wall can be brought into good contact with an inner wall of the pump housing for sealing.
  • the entire valve element is movable between a closed position, in which the valve element frictionally engages a contact surface in the pump housing, and a disengaged position, in which the valve element is movable relative to the contact surface.
  • the valve element and the contact surface can thus function as a coupling, which serves to hold the valve element in a selected switching position.
  • the movement of the valve element is preferably effected by the fluid pressure generated by the impeller. In this way, a pressure-dependent engagement and disengagement coupling can be created, which, depending on the operating conditions of the drive motor, can be engaged and disengaged solely by the pressure build-up in the pump housing.
  • the contact between the valve element and the contact surface can be achieved solely by friction or, optionally, additionally by positive engagement through engagement elements arranged on the valve element and/or the contact surface.
  • To rotate the valve element from one switching position to another it is first moved into its released position, preferably by reducing the pressure in the pump housing or in the pressure chamber surrounding the impeller. Such a pressure reduction can be achieved by reducing the speed of the drive motor or switching off the drive motor.
  • valve element is designed in such a way that the installation of the valve element The valve element is held in its engaged switching position by the contact surface.
  • the entire valve element, as described below, thus functions as a friction-fit coupling, which serves to fix the valve element in a specific switching position when in contact, or to secure it against movement to the other switching position. In the released position, the valve element is free to move between the switching positions.
  • At least one movable section can be designed as an elastic edge section of the ring wall.
  • the entire ring wall is elastically designed so that it can preferably be deflected radially outwards by pressure prevailing inside the ring wall.
  • An elastic design of the wall section can generate restoring forces which preferably return the movable section automatically to its original position when the applied pressure is removed.
  • the entire valve element is movable in a direction transverse to its direction of rotation and parallel to its axis of rotation between a released and a closed position.
  • the direction of movement of the valve element between the released and closed positions is thus different from the direction in which the valve element moves between switching positions. This allows movement between switching positions to be achieved independently of the valve element's fixed position.
  • the valve element is preferably mounted so as to be axially displaceable on the axis of rotation.
  • valve element and the pump housing are designed such that, in the engaged position, at least a section 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 section of the valve element, the coupling described above.
  • Such a coupling can be implemented in this way with very few components. Essentially, no additional components beyond the valve element and the existing pump housing are required.
  • the valve element is designed and arranged such that a pressure prevailing in the circumferential region of the impeller acts on the valve element in such a way that the entire valve element is moved into the closed position. More preferably, the pressure prevailing in the circumferential region of the impeller holds the valve element in fixed contact with a contact surface, in particular an inner wall of the pump housing. Thus, the pressure in the circumferential region of the impeller holds the valve element in its closed position and fixes it in the achieved switching position. The pressure in the circumferential region of the impeller is generated by the impeller during its rotation.
  • the described coupling which is formed by the contact of the valve element with a contact surface, can therefore be engaged by the pump unit without any additional actuating means. A coupling is thus created that can be engaged and disengaged solely by actuating the drive motor.
  • a force-generating means is provided, particularly preferably in the form of a spring, which applies force to the valve element from the closed position in the direction of the released position. This ensures that when the pressure in the pressure chamber on the outlet side of the impeller falls below a predetermined value, the valve element automatically returns to its initial or rest position, which corresponds to the disengaged position. This creates a coupling that automatically disengages when the pressure drops. In other words, increasing the pressure in the pressure chamber moves the coupling into its engaged position, and reducing the pressure releases it.
  • control of the drive motor and/or the design of the drive motor and the force-generating device are coordinated such that, at a specific drive motor speed or output pressure, the force of the force-generating device is overcome to move the valve element into the engaged position.
  • the force-generating device is preferably dimensioned so that it reliably moves the valve element back to the disengaged position when a certain speed or output pressure is undershot.
  • a flow-guiding element preferably spirally shaped, leading to the at least one switching opening, can be located on the inner circumference of the ring wall. This creates a spiral channel in the circumferential region of the impeller leading to the switching opening and thus to the outlet, which preferably rotates together with the valve element when the latter is moved between its switching positions. This ensures optimal flow guidance towards the outlet at all times, regardless of the switching position of the valve element.
  • the valve element is particularly preferred as a molded part made of metal or plastic, especially as an injection-molded plastic part. This enables cost-effective manufacturing and, at the same time, the possibility of easily creating complex geometries, such as flow paths within the valve element.
  • the valve element has a bearing sleeve at its center, which rotatably slides on a fixed bearing pin in the pump housing.
  • the bearing pin can be formed integrally with the pump housing or be a separate component fixed within the pump housing.
  • the bearing sleeve is preferably formed integrally with the other sections of the valve element.
  • the bearing sleeve is designed such that a closed bearing chamber is formed between the bearing sleeve and the bearing pin, allowing for permanent lubrication or pre-lubrication, thereby ensuring smooth rotation of the valve element on the bearing pin.
  • lubrication of the bearing by the pumped fluid can be provided, with the bearing gap between the bearing sleeve and the bearing pin preferably protected against penetrating contaminants to ensure permanently smooth operation.
  • the valve element can be rotatably mounted on an inlet nozzle located in the pump housing and engaging with a suction port of the impeller.
  • This arrangement creates an annular bearing surface surrounding the suction port.
  • This arrangement has the advantage that the interior of the suction port and the suction nozzle can remain free of bearing elements, thus ensuring low flow resistance in the suction area of the impeller. can be achieved.
  • a seal can be created between the valve element and the suction port, so that the valve element can separate a suction-side space from a pressure-side space inside the pump housing.
  • a return element can be provided which acts on the valve element in its direction of rotation.
  • the return element is preferably designed such that, when the impeller is stationary, it moves the valve element into a predetermined initial position, which preferably corresponds to one of the possible switching positions.
  • a return element can, for example, be a spring or a magnetically actuated return element.
  • 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 exerts a torque on the valve element when the valve element is deflected from its initial position.
  • centrifugal pump units such as those used as heating circulation pump units, typically have a defined installation position in which the shaft of the drive motor runs horizontally, a defined initial position can thus be ensured in which the weight is located in one of at least two possible positions.
  • the weight is lifted as long as the flow exerts a sufficient force on the valve element. If this force ceases, gravity moves the valve element back to its original position.
  • the centrifugal pump units described below are intended as heating circulation pump units, particularly for use in a heating system, such as a compact heating system, which serves both to heat a building and to heat domestic hot 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, containing the electrical and/or electronic components for controlling and/or regulating the drive motor 2, is arranged at 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 chamber in which the stator 10 is arranged
  • rotor chamber in which the rotor 12 is arranged
  • the rotor 12 thus rotates in the fluid to be pumped.
  • the rotor 12 drives an impeller 18 via a rotor shaft 16 in a known manner.
  • 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 located there, which engages in the interior of a suction opening 28 of the impeller 18.
  • a cup-shaped valve element 30 Surrounding the impeller 18, a cup-shaped valve element 30 is arranged inside 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 an annular wall 32 on its outer circumference, which has a frustoconical outer contour and an outer contour that essentially corresponds to the inner contour of the pump housing 6 in the circumferential region of the axis of rotation X.
  • the valve element 30 At the axial end of the annular wall 32 with the larger diameter, the valve element 30 is fully open.
  • the valve element 30 has a wall 34, which forms a base of the valve element 30.
  • the wall 34 extends transversely to the annular wall. 30 and perpendicular to the axis of rotation X.
  • the wall 34 forms an annular wall which extends radially inwards from the annular wall 32 and surrounds a central opening 36.
  • the inlet nozzle 26 extends through the opening 36. That is, the valve element 30 is placed with the opening 36 onto the inlet nozzle 26 and fixed there by an annular locking element 38.
  • the locking element 38 engages from the inside into the opening 36 and is fixed to the inlet nozzle 26, for example by clamping.
  • the inlet nozzle 26 and the locking element 38 are designed such that the valve element 30 is guided in the radial direction, but allows a certain degree of movement in the axial direction parallel to the longitudinal axis X.
  • a spring in the form of a wave-shaped spring ring 42 is arranged between a radially projecting shoulder 40 of the inlet nozzle 26 and the wall 34 of the valve element 30.
  • the spring acts axially 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 are spaced away from the inner surface of the pump housing 6, so that the valve element 30 can rotate essentially freely around the inlet port 26, i.e., around the longitudinal axis X inside the pump housing.
  • a rotating flow generated by the impeller 18 inside the valve element 30 in the circumferential region can cause the valve element 30 to rotate due to friction between the flow and the wall surfaces of the valve element 30 (inner surface of the annular wall 32 and wall 34).
  • the rotational movement is limited by a stop pin 44, which engages in an arcuate groove 46 in the bottom of the pump housing 6.
  • the groove 46 extends over an angle of 90° around the longitudinal axis X.
  • the groove 46 and the stop pin 44 ensure that the valve element 30 remains in a It can rotate at an angle of 90° around the longitudinal axis X between two switch positions.
  • the switching opening 48 is formed in the circumferential annular wall 32. This opening is designed as a hole whose outer circumference is completely enclosed by parts of the annular wall 32.
  • the switching opening 48 can be brought into contact with an outlet opening 50, which is connected to the pressure port 22, so that a flow connection is established from the interior of the valve element 30 through the switching opening 48, the outlet opening 50, and to the pressure port 22.
  • the switching opening 48 is brought into contact with an outlet opening 52, which is connected to the pressure port 24. This means that the pressure port 24 opens into the interior of the pump housing 6 at the outlet opening 52.
  • FIG. 3 Figure 1 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 can be a centrifugal pump unit as described above and below.
  • a valve assembly 58 is integrated, which can be formed by the valve element 30 described above.
  • the flow path between a heating circuit 60 for temperature control of a building and a secondary heat exchanger 62 for heating domestic hot water can be controlled via the valve assembly 58. to be switched to supply either the heating circuit 60 or the secondary heat exchanger 62 with heat transfer fluid heated by the primary heat exchanger 54.
  • the switching or movement of the valve element 30 is achieved by a control electronics unit 64 located in the electronics housing 8, which controls the drive motor 2.
  • the control electronics unit 64 can, in particular, include a speed controller or frequency converter.
  • the switching process utilizes the fact that, during rapid start-up of the drive motor 2 and the impeller 18, pressure builds up more quickly in the circumferential region of the impeller than an annular flow suitable for rotating the valve element 30.
  • the valve element is in the Fig. 4 In the first switching position shown, in which the flow path through the pressure port 22 is open and the valve element 30 is to remain in this switching position when the drive motor starts, the drive motor 30 is rapidly accelerated so that pressure quickly builds up inside the valve element 30 and it opens from the position shown in the first switching position.
  • valve element 30 is pressed from the released position shown into a closed position, in which the outer surface of the ring wall 32 and the wall 34 come into frictional contact with the inner surfaces of the pump housing 6, thus securing the valve element 30 against rotation.
  • the outer surface of the valve element 30 therefore forms a releasable coupling with the inner surface of the pump housing 6.
  • valve element 30 If the speed of the drive motor 2 is subsequently increased further, the valve element 30 returns to its closed position in frictional contact with the inner surface of the pump housing 6 in this switching position. However, it is also possible to switch off the drive motor again in this switching position and then start it up directly in the opposite direction of rotation B at such a high speed that a pressure of such high amplitude is immediately generated that the valve element 30 moves in the axial direction X into the Fig. 8 The valve element 30 is moved to the shown position and thus cannot be rotated by the flow in the direction of rotation B. To rotate the valve element 30 back to the first switching position, the drive motor must be driven in the direction of rotation B at such a speed that a flow can build up to move the valve element 30, but not a pressure high enough to overcome the spring force of the spring ring 42.
  • FIG. 10 Figure 1 shows the first switching position with the valve element 30 in the closed position.
  • the switching opening 48 is opposite the outlet opening 50.
  • Fig. 11 Figure 1 shows the second switching position, in which part of the ring wall 32 is opposite the outlet opening 50, so that it is closed. Conversely, in the second switching position, as shown in Figure 2, the ring wall 32 is opposite the outlet opening 50, so that the outlet opening 50 is closed.
  • Fig. 8 The switching opening 48 is shown opposite the outlet opening 52, while in the first switching position, as in Fig. 9 shown, a part of the ring wall 32 is opposite the outlet opening 52 and thus closes it off.
  • Figs. 10 Figure 1 shows the first switching position with the valve element 30 in the closed position.
  • the switching opening 48 is opposite the outlet opening 50.
  • Fig. 11 Figure 1 shows the second switching position, in which part of the ring wall 32 is opposite the outlet opening 50, so that it is closed.
  • the ring wall 32 is opposite the outlet opening 50, so that the outlet opening 50 is closed
  • valve element 30 is in its adjacent position, so that it rests against the inner wall of the pump housing 6 in the circumferential area of the outlet openings 50, 52. is located and can tightly seal it, provided that the ring wall 32 covers the outlet opening 50, 52.
  • FIG. 12 to 14 Figure 1 shows a second embodiment of a centrifugal pump assembly according to the invention, in which the valve element differs from the valve element 30 described above only in the manner of its mounting. Only the differences from the first embodiment are described below. For all other aspects, reference is made to the preceding description.
  • the valve element 30' is rotatably mounted on a bearing pin or bearing bolt 66.
  • the bearing bolt 66 extends axially along the longitudinal axis X from the bottom into the interior of the pump housing 6.
  • the valve element 30 has an integrally formed suction port 68 on its wall 34, which engages with the suction opening 28 of the impeller 18 instead of the inlet port 46.
  • a bearing sleeve 70 Inside the suction port 68 is a suction opening in which a bearing sleeve 70 is held by means of connecting webs, the bearing sleeve 70 being formed integrally with the remaining part of the valve element 30'.
  • the bearing sleeve 70 is mounted on the bearing pin 66, meaning it rotates on the bearing pin 66.
  • a spring 72 in the form of a compression spring is also arranged around the bearing pin 66.
  • the spring 72 performs 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 the latter is in the Fig. 14 In the loosened position shown, the bearing sleeve 70 is pushed away from the inner wall of the pump housing 6 and can rotate freely.
  • the valve element 30" has an internal spiral flow guide 46, which forms a spiral channel towards the switching orifice 48.
  • the flow guide 46 is designed as a spiral projection that narrows radially towards the switching orifice 48, thus increasing the free space between the flow guide 76 and the impeller 18 and creating a spirally widening flow channel towards the outlet orifice 48.
  • the flow proceeds in the direction of rotation A.
  • Figs. 16 and 17 Since the flow guide 76 rotates together with the valve element 30" between the switching positions, optimal flow guidance is always ensured towards each of the pressure ports 22 and 24 during operation. It can be understood that such a flow guide 76 could also be used in the first two embodiments.
  • valve element 30 has a weight 78, which is arranged in a receptacle in the base or wall 34 of the valve element 30".
  • the weight 78 is diametrically opposite the switching opening 48, so that it is in the Fig. 16
  • the first switching position shown is at the bottom.
  • the weight 78 serves as a return element, so that the drive motor 2 only needs to be driven in one direction of rotation A.
  • To return the valve element 30 it is not necessary to generate an annular flow in the opposite direction inside the valve element 30". Rather, the return occurs by gravity when the weight 78 moves downwards.
  • the drive motor is to be put into operation in the first switching position shown.
  • valve element 30" is pressed by the generated fluid pressure against the spring force of the spring 42 in contact 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 started up correspondingly more slowly by the control electronics 64, so that an annular flow can initially build up in the direction of rotation A, which moves the valve element 30" in the Fig. 14 rotates in the shown resolved position and thus into the Fig.
  • a return element could also be used in the first two embodiments.
  • a return element acting by gravity for example a spring or a magnetically acting return element could also be used.
  • the position could also be a movable section of the valve element 30, 30', 30" between a released and engaged position.
  • the ring wall 32 could be elastically designed to be deformed by an internal fluid pressure and brought into contact with an inner wall of the pump housing 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (12)

  1. Ensemble de pompe centrifuge avec un moteur d'entraînement électrique (2), au moins une roue (18) entraînée par celui-ci et qu'un corps de pompe (6) entourant la roue (18), lequel comporte au moins un raccord d'aspiration (20) et au moins deux raccords de pression (22, 24), sachant que dans le corps de pompe (6) est disposé un clapet rotatif (30, 30', 30"), lequel peut être mobile entre au moins deux positions de fonctionnement dans lesquelles les voies d'écoulement sont largement ouvertes de façon différente par au moins les deux raccords de pression (22, 24), sachant que le clapet (30, 30', 30") comporte une paroi annulaire (32) entourant la roue (18) dans laquelle est constitué au moins une ouverture de fonctionnement (48), sachant que le clapet (30, 30', 30") est logé pouvant tourner à l'intérieur du corps de pompe (6) autour d'un axe de rotation central (X) par rapport à la paroi annulaire (32), et sachant qu'un écoulement généré devant la roue (18) peut directement attaquer la paroi annulaire (32) pour faire tourner le clapet (30, 30', 30") autour de l'axe de rotation (X) en fonction de l'écoulement,
    caractérisé en ce que
    tout le clapet (30, 30', 30") peut être mobile dans une direction transversalement à sa direction de rotation (A,B) et parallèlement à son axe de rotation (X) entre une position appliquée, dans laquelle il s'applique par conformité de frottement à une surface d'appui dans le corps de pompe (6) et une position débloquée dans laquelle le clapet (30, 30', 30") peut être mobile par rapport à la surface d'appui, sachant qu'un moyen générateur de force est présent, lequel sollicite le clapet (30, 30', 30") avec force de la position appliquée en direction de la position débloquée et le clapet (30, 30', 30") est configuré de telle manière que le clapet (30, 30', 30") est maintenu dans sa position de fonctionnement adoptée par l'appui par conformité de frottement dans la position appliquée.
  2. Ensemble de pompe centrifuge selon la revendication 1, caractérisé en ce qu'au moins une, de préférence deux ouvertures de sortie (50, 52) reliées aux raccords de pression (22, 24) sont placées dans une paroi du corps de pompe (6) tournée vers la paroi annulaire (32), avec laquelle/lesquelles au moins une ouverture de fonctionnement (48) peut être mise au moins en partie en recouvrement en fonction de la position de fonctionnement du clapet (30, 30', 30").
  3. Ensemble de pompe centrifuge selon la revendication 1 ou 2, caractérisé en ce que le clapet (30, 30', 30") comporte à l'intérieur de la paroi annulaire (32) une paroi (34) s'étendant transversalement à l'axe de rotation, laquelle entoure de préférence une bouche d'aspiration (28) de la roue (18).
  4. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi annulaire (32) comporte un contour extérieur circulaire et de préférence un contour extérieur cylindrique ou conique.
  5. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce que le clapet (30, 30', 30") est logé pouvant tourner sur un composant fixe (66, 26) à l'intérieur du corps de pompe (6), sachant de préférence que le clapet (30', 30") comporte en son centre une douille de support (70), laquelle coulisse en rotation sur une tige de support (66) fixe dans le corps de pompe (6) et/ou le clapet (30) est logé pouvant tourner sur une tubulure d'admission (26) disposée dans le corps de pompe (6) se trouvant en prise avec une bouche d'aspiration (28) de la roue (18).
  6. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une ouverture de fonctionnement (48) est entourée complètement sur son bord par au moins une section de la paroi annulaire (32).
  7. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi annulaire (32) comporte transversalement à sa périphérie une direction d'extension dans un angle inférieur à 90° et de préférence inférieur à 45° par rapport à l'axe de rotation (X).
  8. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce que le clapet (30, 30', 30") et le corps de pompe (6) sont configurés de telle manière qu'au moins une section du clapet (30, 30', 30") vient s'appliquer dans la position appliquée à une paroi intérieure du corps de pompe (6).
  9. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce que le clapet (30, 30', 30") est configuré de telle manière qu'une pression régnant dans la zone périphérique de la roue (18) agit sur le clapet (30, 30', 30") de telle sorte que tout le clapet (30, 30', 30") est déplacé dans la position appliquée.
  10. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un moyen générateur de force est un ressort (42, 72).
  11. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un élément de guidage d'écoulement (76) menant à au moins une ouverture de fonctionnement (48), constitué de préférence en forme de spirale, est placé sur la périphérie intérieure de la paroi annulaire (32).
  12. Ensemble de pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisé par un élément de rappel (78) agissant sur le clapet (30") dans sa direction de rotation (B), lequel est constitué de telle manière qu'à l'arrêt de la roue, le clapet (30'') se déplace dans une position de sortie prédéterminée, sachant que l'élément de rappel est de préférence un poids (78) disposé sur le clapet (30'').
EP19710408.6A 2018-03-13 2019-03-12 Groupe pompe centrifuge avec valve rotative Active EP3765747B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18161524.6A EP3540233A1 (fr) 2018-03-13 2018-03-13 Groupe pompe centrifuge avec valve rotative
PCT/EP2019/056079 WO2019175133A1 (fr) 2018-03-13 2019-03-12 Ensemble pompe centrifuge

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EP3765747A1 EP3765747A1 (fr) 2021-01-20
EP3765747B1 true EP3765747B1 (fr) 2025-12-03

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EP19710408.6A Active EP3765747B1 (fr) 2018-03-13 2019-03-12 Groupe pompe centrifuge avec valve rotative

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US (1) US11460031B2 (fr)
EP (2) EP3540233A1 (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
US11982279B2 (en) 2022-01-27 2024-05-14 Cooper-Standard Automotive Inc. Pump with rotary valve
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
US12092115B2 (en) * 2022-05-26 2024-09-17 Cooper-Standard Automotive Inc. Pump with rotary valve and fluid submersible motor
US12297843B2 (en) * 2022-06-08 2025-05-13 Cooper-Standard Automotive Inc. Multiport fluid pump with integrated valve
US20240068481A1 (en) * 2022-08-24 2024-02-29 Cooper-Standard Automotive Inc Multiport fluid pump with reserve capacity impeller
DE102023207225A1 (de) * 2023-07-28 2025-01-30 Robert Bosch Gesellschaft mit beschränkter Haftung Pumpe zur Förderung eines Fluids
US12085081B1 (en) * 2023-09-23 2024-09-10 Cooper-Standard Automotive Inc. Fluid pump and valve switch

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Publication number Publication date
WO2019175133A1 (fr) 2019-09-19
US20210003133A1 (en) 2021-01-07
EP3765747A1 (fr) 2021-01-20
CN111919029A (zh) 2020-11-10
CN111919029B (zh) 2022-04-29
US11460031B2 (en) 2022-10-04
EP3540233A1 (fr) 2019-09-18

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