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EP3376037A1 - Groupe pompe centrifuge - Google Patents

Groupe pompe centrifuge Download PDF

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Publication number
EP3376037A1
EP3376037A1 EP17160836.7A EP17160836A EP3376037A1 EP 3376037 A1 EP3376037 A1 EP 3376037A1 EP 17160836 A EP17160836 A EP 17160836A EP 3376037 A1 EP3376037 A1 EP 3376037A1
Authority
EP
European Patent Office
Prior art keywords
valve element
movable
wall
flow
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17160836.7A
Other languages
German (de)
English (en)
Other versions
EP3376037B1 (fr
Inventor
Thomas Blad
Christian BLAD
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 EP17160836.7A priority Critical patent/EP3376037B1/fr
Priority to PCT/EP2018/056187 priority patent/WO2018167031A1/fr
Priority to CN201880018332.9A priority patent/CN110418893B/zh
Priority to US16/493,125 priority patent/US11073161B2/en
Publication of EP3376037A1 publication Critical patent/EP3376037A1/fr
Application granted granted Critical
Publication of EP3376037B1 publication Critical patent/EP3376037B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal 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
    • F04D29/426—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
    • 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
    • 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
    • F04D13/0686—Mechanical details of the pump control unit
    • 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
    • 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
    • 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
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F04D29/40—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
    • F04D29/4293—Details of fluid inlet or outlet
    • 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

Definitions

  • the invention relates to a hydraulic unit with a centrifugal pump unit and at least one valve element, which is movable by a liquid flow caused by the centrifugal pump unit.
  • centrifugal pump units which have valve elements which are moved by the flow in the pump unit.
  • centrifugal pump units are known in which by reversing the direction of rotation of the drive motor, the flow in the interior of the pump housing can be directed in two different directions, so that a switching element between two outputs or two inputs of the centrifugal pump unit can be moved to the flow either through one of them promote.
  • a disadvantage of these known centrifugal pump units is a relatively complex mechanism or the occurrence of efficiency losses due to the switching elements required in the flow path or the required direction of rotation reversal.
  • the hydraulic unit according to the invention has a centrifugal pump unit which has an electric drive motor and at least one impeller driven in rotation therefrom.
  • the electric drive motor is preferably a wet-running motor, that is, a drive motor with a split tube or split pot between the stator and rotor, so that the rotor can rotate in the liquid to be conveyed.
  • the hydraulic unit according to the invention has at least one valve element, which is arranged and configured such that it can be moved by a liquid flow caused by the impeller, in particular between at least two different switching positions is movable.
  • the hydraulic unit preferably comprises at least those flow channels or flow paths which are required for connection of the centrifugal pump assembly to external elements, for example pipelines of a heating circuit. More preferably, the hydraulic unit comprises at least a portion of the flow paths, which are required for connection between the centrifugal pump unit and the valve element, wherein particularly preferably the valve element forms an integrated unit with the centrifugal pump unit. So z. B. the valve element in the pump housing, in which the impeller rotates, may be arranged.
  • the hydraulic unit is designed for use in a heating and / or air conditioning, that is, the centrifugal pump unit is preferably designed for use as Umisselzpumpenaggregat to a liquid heat carrier such as especially water, to circulate in a cycle of a heating or air conditioning.
  • the hydraulic unit can be designed as an integrated hydraulic unit for a heating system, in particular a compact heating system.
  • Such integrated units usually include all major flow paths and hydraulic components of the compact heating system.
  • a secondary heat exchanger for heating service water can be integrated into the hydraulic unit.
  • Such a hydraulic unit then essentially has only the connections for one or more heating circuits, for at least one heat source and optionally an input for cold process water and an outlet for heated service water.
  • Required valves, sensors and the Kreiselpumpenaggregot are preferably integrated into the hydraulic unit, more preferably at least a portion of the required flow paths in one-piece components made of cast, in particular plastic injection molded, may be formed.
  • At least a portion of a wall defining a flow path in the hydraulic unit is designed to be movable.
  • This is preferably a flow path through which the liquid conveyed by the centrifugal pump assembly flows.
  • the liquid flows along the wall and thus also along the at least one movable section.
  • This movable portion of the wall is part of the valve element or coupled or connected to the valve element for its movement.
  • the movable wall can transmit a force or kinetic energy directly to the valve element to its movement.
  • the movable section is movable by the fluid flow along the wall.
  • the liquid flow over the movable portion of the wall cause a movement of the coupled with this portion of the wall valve element.
  • the transfer of kinetic energy from the flow to the movable portion of the wall is carried out according to the invention at least partially by frictional forces between the liquid flow and the wall. Particularly preferably, the entire force or energy transfer takes place by a friction of the liquid flow at the movable portion of the wall.
  • Such an embodiment has the advantage that essentially only one energy loss is utilized for the movement of the valve element, which would occur anyway in the interior of the flow path due to the friction occurring.
  • the surface of the movable portion of the wall has a surface roughness which does not substantially deviate from the properties of the surfaces of the remaining wall of the flow path. Additional elements which project into the flow and cause resistance are preferably not provided.
  • the valve element may be, for example, a switching or mixing valve.
  • the valve element is preferably movable between two switching positions or end positions, wherein it can be moved back and forth between these end positions by the flow.
  • the direction reversal can be achieved, for example, by changing the direction of the flow, be achieved for example by changing the direction of rotation of the impeller.
  • an additional return element such as a spring or a weight could be provided, which ensures when switching off the flow that the valve element moves back into a predetermined starting position.
  • the at least one movable section of the wall is preferably arranged such that it is movable parallel to the liquid flow running along the wall. This means that the flow can flow along this movable section of the wall as on adjacent wall parts, without being slowed down or impaired by the movable section of the wall.
  • the flow preferably carries the movable section of the wall solely by frictional forces in the direction of flow and thus moves the coupled valve element.
  • the at least one movable section of the wall may delimit a flow path extending from the pressure side of the centrifugal pump unit or a flow path extending from the suction side of the centrifugal pump unit.
  • a suction side flowing toward the centrifugal pump unit flow or a pressure side flowing away from the centrifugal pump assembly flow to move the movable portion and thus the valve element.
  • two movable sections are provided in two flow paths, which are both part of the valve element or are coupled to the valve element for its drive.
  • the movable portion of the wall is, as described above, preferably designed and arranged such that it is movable together with the at least one valve element by a loss energy, which is caused by the frictional forces on the wall of the flow path.
  • a loss energy which is caused by the frictional forces on the wall of the flow path.
  • the at least one section of the wall is rotatably mounted in a pump housing and preferably mounted rotatably in the pump housing together with the at least one valve element.
  • the impeller rotates in the pump housing.
  • the impeller generates a likewise rotating flow in the peripheral region. If the portion of the wall and preferably also the valve element are rotatable, this rotating flow can be very easily converted into a movement of the valve element, since the rotating flow can move the rotatable movable portion of the wall in the flow direction by frictional forces.
  • the axis of rotation of the at least one movable portion of the wall is aligned with the axis of rotation of the drive motor and the at least one impeller. More preferably, the axis of rotation of a rotatable valve element is aligned with the axis of rotation of the drive motor and the impeller.
  • the at least one movable portion of the wall is configured such that the frictional forces acting on it by the liquid flow are greater than those frictional forces which occur in a bearing or the bearings of the movable portion of the wall and of the at least one valve element.
  • This can be achieved for example by a correspondingly large surface of the movable portion of the wall become.
  • the surface of the movable wall could be textured to cause higher friction. It is essential that the configuration is such that the forces transmitted by the flow to the movable wall section are greater than the holding or friction forces which act on the movable section of the wall and of the at least one valve element. Thus, a movement of the valve element can be caused by the flow.
  • the movable portion of the wall has a disc-shaped and in particular circular outer contour, wherein the outer diameter of the disc is preferably at least as large as the diameter of the impeller in the pump housing.
  • a movable separating element which separates a suction chamber in the interior of a pump housing of the centrifugal pump assembly from a pressure chamber surrounding the impeller, wherein a pressure chamber facing surface and / or a suction chamber facing surface of the separating element, the at least one movable portion of Wall forms or has.
  • the entire separating element is movable, in particular rotatable, as described above.
  • the separating element may preferably be rotatable about an axis of rotation, which is aligned with the axis of rotation of the impeller. More preferably, the separating element is formed directly from the valve element, that is, the separating element is part of the valve element.
  • the separating element surrounds a suction mouth of the impeller ring-shaped, wherein the separating element may have a central opening which is aligned with the suction mouth, in particular with this sealingly engaged.
  • the separating element forms a conventional deflector plate between the suction chamber and the pressure chamber of the pump unit and is simultaneously movable to drive the valve element when the separating element is moved by the flow acting on it or the flow flowing along it.
  • the valve element is preferably rotatably mounted on a central bearing, wherein the axis of rotation of the valve element, as described, preferably extends in alignment with the axis of rotation of the drive motor.
  • the central bearing has the advantage that the bearing diameter can be made very small, so that the friction losses on the bearing surfaces can be minimized.
  • the movable portion of the wall when it is part of the valve member, it may be located radially outward of the bearing, preferably radially spaced from the bearing so as to cause greater torque to move the valve member through the flow engaging the movable portion.
  • the valve element is movable between at least two switching positions, these switching positions can be limited or defined for example by stops. However, it is also conceivable that the valve element can occupy more than two switching positions.
  • the valve element can act according to a first embodiment of the invention as a switching valve between two flow paths, in which case in a first switching position, a first flow path is opened and a second flow path is closed. Conversely, in a second switching position, the first flow path is closed and the second flow path is opened.
  • the valve element may alternatively or additionally act as a mixing valve.
  • the valve element can cooperate with at least two valve openings of two flow channels such that the valve openings of the flow channels are opened differently depending on the switching position of the valve element.
  • the valve element is preferably designed such that it further closes one of the valve openings during its movement and at the same time further opens the other valve opening. This is preferably done by the same amount. It can be achieved particularly simply by providing a one-piece valve element which can cover both valve openings.
  • a valve element also means an arrangement of two valve elements, which are coupled to one another in a suitable manner for common movement.
  • the at least two valve openings each span a surface which extends parallel to a direction of movement of the valve element between the at least two switching positions. That is, preferably, the valve element for opening and closing the valve openings is moved in parallel with these or the areas spanned by the valve openings and not approached and removed from the valve openings for opening and closing.
  • This allows a very simple structural design of two valve openings to be opened and closed alternately by a valve element.
  • the valve element is designed and arranged such that it is movable by the liquid flow along a first movement path or a first movement path between at least two switching positions and additionally by a pressure generated by the impeller along a second movement path or along a second movement path Force is acted upon or movable, wherein the second movement path is angled to the first movement path.
  • This makes it possible to perform the change between the switching positions very low friction, since in this state, preferably, the valve element is not applied to required valve seats and / or contact surfaces or rests against these relatively low friction.
  • the valve element can be subjected to a force such that it comes into contact with the valve seats or is pressed with greater force sealingly against the valve seats and / or contact surfaces. In this state, then there is a greater friction or holding force between the valve element and the valve seats or other contact surfaces, which can simultaneously serve to keep the valve element in the achieved switching position.
  • the valve element is preferably movable along the second movement path between a first released position, in which the valve element is movable between the at least two switching positions, and an abutting position, on which it bears against at least one contact surface.
  • first position may also optionally abut against the contact surface, but so that it can slide along the contact surface relatively low friction.
  • the valve element In the second position, however, the valve element is pressed against the contact surface so that a stronger Friction occurs between the valve element and the system, which generates a holding force which prevents further movement of the valve element via the liquid flow, as described above.
  • a pressure can be achieved by increasing the speed and in particular very fast speed increase of the drive motor, so that the valve element can then be kept targeted in an reached switching position.
  • the pressure at which the valve element comes to rest on the contact surface is chosen so that it is lower than the lowest operating pressure during normal operation of the centrifugal pump assembly.
  • the pressure may be adjusted by a return element, such as a return spring, which is arranged to move the valve element to the released first position at lower pressure.
  • valve element and the contact surface are preferably designed so that they engage with each other positively and / or positively in the adjacent position, wherein a larger force is preferably transferable via this engagement than between the liquid flow and the at least one movable portion of the wall. This ensures that the valve element, when it is in contact with the contact surface, is held in the achieved switching position and can not be moved further by the liquid flow. The liquid flow can then continue to flow along the movable portion of the wall, wherein this is no longer moved.
  • centrifugal pump assembly according to the invention described in the following description relate to applications in heating and / or air conditioning systems, in which of the centrifugal pump unit, a liquid heat carrier, in particular water, is circulated.
  • the centrifugal pump unit according to the first embodiment of the invention has a motor housing 2, in which an electric drive motor is arranged.
  • This has in known manner a stator 4 and a rotor 6, which is arranged on a rotor shaft 8.
  • the rotor 6 rotates in a rotor space, which is separated from the stator space in which the stator 4 is arranged by a split tube or a split pot 10. That is, it is a wet-running electric drive motor.
  • the motor housing 2 is connected to a pump housing 12, in which a rotatably connected to the rotor shaft 8 impeller 14 rotates.
  • an electronics housing 16 is arranged, which includes a control electronics or control device for controlling the electric drive motor in the pump housing 2.
  • the electronics housing 16 could also be arranged in a corresponding manner on another side of the stator housing 2.
  • a movable valve element 18 is arranged in the pump housing 12.
  • This valve element 18 is rotatably mounted on an axis 20 in the interior of the pump housing 12, in such a way that the axis of rotation of the valve element 18 is aligned with the axis of rotation X of the impeller 14.
  • the axis 20 is rotatably fixed to the bottom of the pump housing 12.
  • the valve element 18 is not only rotatable about the axis 20, but by a certain amount in the longitudinal direction X movable. In One direction, this linear mobility is limited by the pump housing 12, against which the valve element 18 abuts with its outer periphery. In the opposite direction, the mobility is limited by the nut 22, with which the valve element 18 is mounted on the axle 20. It should be understood that instead of the nut 22, another axial attachment of the valve member 18 to the axle 20 could be selected.
  • the valve element 18 forms a separating element, which separates a suction chamber 24 from a pressure chamber 26 in the pump housing 12.
  • the impeller 14 rotates.
  • the pressure chamber 26 is connected to the pressure port or discharge port 28 of the centrifugal pump assembly, which forms the outlet of the centrifugal pump assembly.
  • the suction chamber 24 open two suction-side inputs 28 and 30, of which the input 28 is connected to a first suction port 32 and the input 30 to a second suction port 34 of the pump housing 12.
  • the valve element 18 is disc-shaped and at the same time performs the function of a conventional deflector plate, which separates the suction chamber 24 from the pressure chamber 26. That is, it serves in the region of the pressure space of the flow guide and forms part of the wall of the pressure chamber 26.
  • the valve element 18 has a central suction opening 36 which has a protruding circumferential collar which is in engagement with the suction mouth 38 of the impeller 14 and essentially in close contact with the suction mouth 38. Facing the impeller 14, the valve member 18 is formed substantially smooth.
  • the valve element On the side facing away from the impeller 14, the valve element has two annular sealing surfaces 40, which are located in this embodiment on closed tubular nozzle.
  • the two annular sealing surfaces 40 are at two diametrically opposite positions on the sealing element 18 with respect to the Rotary axis X arranged so that they can in the peripheral region of the inputs 28 and 30 at the bottom of the pump housing 12 in sealing contact with each other to close the inputs 28 and 30.
  • support members 42 are arranged, which can also come to rest on the peripheral portion of the inputs 28, 30, but are spaced apart so that they do not close the inputs 28, 30 then.
  • the inputs 28 and 30 are not on a diameter line with respect to the axis of rotation X, but on a radially offset straight line, so that upon rotation of the valve member 18 about the rotation axis X in a first switching position, the input 38 is closed by a sealing surface 40, while the support elements 42 are located at the entrance 30 and open this. In a second switching position, the input 30 is closed by a sealing surface 40, while the support elements 42 abut in the peripheral region of the input 28 and open it.
  • the first switching position, in which the input 38 is closed and the input 30 is opened, is in Fig. 5 shown.
  • the second switching position, in which the input 30 is closed and the input 28 is open is in Fig. 6 shown. This means, by a rotation of the valve element by 90 ° about the axis of rotation X can be switched between the two switching positions.
  • the two switching positions are limited by a stop element 44 which abuts alternately on two stops 46 in the pump housing 12.
  • a spring 48 pushes the valve member 18 in a disengaged position in which the outer periphery of the valve member 18 is not close to the pump housing 12 and the sealing surfaces 40 not tight in the peripheral region of the inputs 28 and 30 abut, so that the valve element 18 can rotate about the axis 20.
  • the drive motor is rotated by the control device 17 in the electronics housing 16, so that the impeller 14 rotates, is in the pressure chamber 26 generates a circulating flow which rotates by friction on the end face of the valve element 18 in the direction of rotation of the flow.
  • the valve element 18 thus forms a movable portion of the wall of the pressure chamber 26, which is moved by the flow.
  • the control device 17 is designed so that it can selectively drive the drive motor in two directions of rotation.
  • the valve element 18 about the rotational axis X depending on the direction of rotation of the impeller 14 via the offset from the impeller 14 in rotation flow can also be moved in two directions, since the flow in the peripheral region of the impeller 14 always runs in the direction of rotation.
  • the valve element 18 can be rotated between the two limited by the stops 46 switching positions.
  • the support members 42 come to rest, so that this input remains open and a flow path from this input 28, 30 is given to the suction port 36 and from there into the interior of the impeller 14.
  • a frictional engagement between the valve element 18 and the pump housing 12 is simultaneously created. This frictional engagement ensures that the valve element 18 is held in the achieved switching position. This allows the drive motor briefly to take out of service again and take in the opposite direction of rotation again to operate without the valve element 18 is rotated.
  • the described centrifugal pump assembly according to the first embodiment of the invention can be used, for example, in a heating system as shown in FIG Fig. 7 is shown.
  • a heating system is commonly used in homes or homes and is used to heat the building and to provide heated service water.
  • the heating system has a heat source 52, for example in the form of a gas boiler.
  • a heating circuit 54 is present, which leads, for example, by different radiators of a building.
  • a secondary heat exchanger 56 is provided, via which service water can be heated.
  • a switching valve is required, which selectively directs the heat transfer stream through the heating circuit 54 or secondary heat exchanger 56.
  • this valve function is taken over by the valve element 18, which is integrated in the centrifugal pump unit 1.
  • the control is carried out by the control device 17 in the electronics housing 16.
  • the heat source 52 is connected.
  • a flow path 58 is connected, while to the suction port 34, a flow path 60 through the Heating circuit 54 is connected.
  • the second embodiment according to Fig. 8 to 10 differs from the first embodiment in the construction of the valve element 18 '. Also in this embodiment separates the valve element 18 'as a separating element the pressure chamber 26 of a suction chamber 24 of the pump housing 12 and forms a movable portion of the flow-carrying wall of the pressure chamber 26.
  • the valve element 18 has a central suction opening 36', in which the suction port 38 of Impeller 14 sealingly engages. Opposite the suction opening 36, the valve element 18 'has an opening 62 which, depending on the switching position of the valve element 18', can optionally be brought to coincide with one of the inputs 28, 30.
  • the inputs 28 ', 30' in this embodiment differ in their shape from the inputs 28, 30 according to the previous embodiment.
  • the valve element 18 ' has a central projection 64, which engages in a central hole 60 in the bottom of the pump housing 12 and is rotatably mounted there about the axis of rotation X.
  • the projection 64 in the hole 66 also allows axial movement along the axis of rotation X, which is limited in one direction by the bottom of the pump housing 12 and in the other direction by the impeller 14.
  • the valve element 18 ' On its outer circumference, the valve element 18 'has a pin 68 which engages in a semicircular groove 70 at the bottom of the pump housing 12.
  • the ends of the groove 70 serve as abutment surfaces for the pin 68 in the two possible switching positions of the valve element 18 ', wherein in a first switching position, the opening 62 via the input 28' and in a second switching position the opening 62 on the input 30 'and the other entrance is closed by the bottom of the valve element 18 '.
  • the rotational movement of the valve element 18 'between the two switching positions also takes place in this embodiment by the flow caused in the pressure chamber 26 by the impeller 14.
  • projections 72 directed in the pressure space 26.
  • the third embodiment according to Fig. 11 to 13 shows a further possible embodiment of the valve element 18 ".
  • This embodiment differs from the preceding embodiments in the construction of the valve element 18".
  • This is designed as a valve drum.
  • the pump housing 12 substantially corresponds to the structure according to Fig. 1 to 6
  • the arrangement of the inputs 28 and 30 corresponds to the arrangement described with reference to the first embodiment.
  • the valve drum of the valve element 18 " consists of a pot-shaped lower part, which is closed by a cover 78.
  • the cover 78 faces the pressure chamber 26 and has the central suction opening 36, which engages with its axially directed collar in the suction mouth 38 of the impeller 14
  • the cover 78 thus forms a movable section
  • On the opposite side of the bottom of the lower part 36 has an inlet opening 80, which is brought depending on the switching position with one of the inputs 28, 30, while the other input 28, 30 through the bottom of the Lower part 26 is closed.
  • the valve member 18 "is rotatably supported on an axle 20 which is fixed in the bottom of the pump housing 12, wherein the axis of rotation defined by the axis 20 corresponds to the axis of rotation X of the impeller 14.
  • valve element 18 (along the axis 20 to a certain extent axially displaceable, whereby also a spring 48 is provided, which in the rest position the valve element 18" in his in Fig. 13 shown released position presses.
  • This axial position is limited in this embodiment by the nut 22.
  • the valve element 18 " in the released position, the valve element 18 ", as described above, by the flow, which is caused by the impeller 14, rotatable, that is, there is a hydraulic coupling between the impeller 14 and valve element 18" made.
  • the adjacent position which in Fig. 12 is shown, depending on the switching position to one of the inputs 28, 30 sealed.
  • the bearing of the valve element 18 "on the axis 20 is further encapsulated by two sleeves 82 and 84, so that these areas are protected from contamination by the pumped fluid and can optionally be pre-lubricated in order to ensure the easy rotation of the valve element 18 "by the flow caused by the impeller 14. It should be understood that even with the other embodiments described herein, the storage could be suitably encapsulated.
  • Fig. 14 and 15 show a fourth embodiment in which the structure of the pump housing 12 corresponds to the structure of the pump housing 12 according to the first and the third embodiment.
  • the rotational movement of the valve element 18c by the suction-side flow that is, the entering into the suction port 38 of the impeller 14, supported flow.
  • the valve element 18c is formed substantially drum-shaped and has a pressure chamber 26 facing the cover 28 with the central suction opening 36, which with the suction mouth 38, as described above, is engaged.
  • the lower part shown here 76b has two inlet openings 80, which can be brought to cover depending on the switching position with one of the inputs 28, 30, wherein the respective other input 28, 30 is sealed by the bottom of the lower part 46b, as in the preceding Embodiment has been described.
  • a guide wheel 86 is arranged with blades, in which the flow from the inlet openings 80 enters radially and axially to the central suction opening 36 exits.
  • the stator 86 is a flow-guiding member which serves with its walls of the flow guide and can be moved by the flow as a movable part of the flow-guiding walls.
  • a torque is also generated about the axis 20, through which the valve element 18c can be moved between the switching positions.
  • a spring 48 as described above, may also be provided to move the valve element 18c to a released position. Since the shape of the blades of the stator 86 always generates a torque in the same direction, regardless of which direction the impeller 14 rotates, in this embodiment, the return movement is performed by a weight 88. In operation, there is the centrifugal pump unit always in the installation position, which in Fig. 15 is shown, in which the rotation axis X extends horizontally.
  • valve member 18c When the centrifugal pump assembly is turned off, the valve member 18c always rotates about the axis 20 so that the weight 88 is below. By the torque generated by the stator 86, the valve element 18c can be rotated against this restoring force generated by the weight 88, whereby by rapid commissioning of the drive motor in the pressure chamber 26 so quickly a pressure can be built up that the valve element 18c in its adjacent position occurs, as described above, in which it is non-positively rotatably held on the pump housing 12 without being moved out of its rest position. It should be understood that a provision of the valve member by gravity or other restoring force regardless of the drive could also be used in the other embodiments described herein.
  • the fifth embodiment according to Fig. 16 to 18 differs from the preceding embodiments again in the construction of the valve element.
  • the valve element 18d is conical.
  • the valve element 18d has a conical cup-shaped lower part 76d, which is closed by a cover 78d, wherein in the lid 78d in turn a central suction opening 36 is formed, which in the manner described above with the suction port 38 of the impeller 14 is engaged.
  • the lid 78d adjoins the pressure chamber 26 and forms there a movable portion of the flow-guiding wall.
  • entrance ports 90 which can be selectively made to overlap by rotating the valve element 18d having entrances connected to the suction ports 32 and 34 to a flow path through the inside of the valve element 18d to the suction port 36 produce. Between the inlet openings 90 are at the conical bottom sealing surfaces 92 formed, which can close the other entrance.
  • the valve element 18d has a pin-shaped projection 64, which engages in a recess at the bottom of the pump housing 12 and there rotatably supports the valve element 18d about the axis of rotation X.
  • a pin-shaped projection 64 which engages in a recess at the bottom of the pump housing 12 and there rotatably supports the valve element 18d about the axis of rotation X.
  • valve element 18 is shown, and an adjacent position, as in Fig. 17 shown is possible.
  • the lower part 76d of the valve element 18d is substantially not abutted on the pump housing 12, so that it is rotatable by the flow in the pressure chamber 26, as described in the embodiments described above.
  • a reciprocating movement of the valve element 18d can be achieved, wherein the rotational movement of the valve element 18d can also be limited here by stops, not shown.
  • valve element 18d there is a tight contact of the valve element 18d, on the other hand it is frictionally held, so that it again, as long as the pressure in the pressure chamber 26 is sufficiently large, even with a change of direction of the impeller 14 is not moved between the switching positions.
  • the pump housing 12 serves as a combined valve and pump housing, which is integrally formed.
  • the pump housing 12 could be formed in a corresponding manner in several parts.
  • Such a pump housing and valve housing could be suitably connected to one another by flow paths or also be placed directly against each other, so that in total essentially a shape is achieved, as in the one-piece pump housing according to the foregoing description.

Landscapes

  • 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)
EP17160836.7A 2017-03-14 2017-03-14 Groupe pompe centrifuge Active EP3376037B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17160836.7A EP3376037B1 (fr) 2017-03-14 2017-03-14 Groupe pompe centrifuge
PCT/EP2018/056187 WO2018167031A1 (fr) 2017-03-14 2018-03-13 Ensemble pompe centrifuge
CN201880018332.9A CN110418893B (zh) 2017-03-14 2018-03-13 离心泵机组
US16/493,125 US11073161B2 (en) 2017-03-14 2018-03-13 Centrifugal pump assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17160836.7A EP3376037B1 (fr) 2017-03-14 2017-03-14 Groupe pompe centrifuge

Publications (2)

Publication Number Publication Date
EP3376037A1 true EP3376037A1 (fr) 2018-09-19
EP3376037B1 EP3376037B1 (fr) 2021-01-27

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EP17160836.7A Active EP3376037B1 (fr) 2017-03-14 2017-03-14 Groupe pompe centrifuge

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US (1) US11073161B2 (fr)
EP (1) EP3376037B1 (fr)
CN (1) CN110418893B (fr)
WO (1) WO2018167031A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3376051B1 (fr) * 2017-03-14 2022-08-24 Grundfos Holding A/S Groupe motopompe
EP3904689A1 (fr) * 2020-04-28 2021-11-03 Grundfos Holding A/S Ensemble pompe centrifuge
EP4487063A1 (fr) 2022-03-01 2025-01-08 Grundfos Holding A/S Procédé de commande de système hydronique
EP4591008A1 (fr) 2022-09-21 2025-07-30 Grundfos Holding A/S Procédé de commande pour un système hydronique
US20240227502A9 (en) * 2022-10-20 2024-07-11 Cooper-Standard Automotive Inc Pump with integrated valve and temperature sensor and a thermal management system including such a pump
CN117514834A (zh) * 2023-11-08 2024-02-06 深圳麦格米特电气股份有限公司 一种一进两出水泵
EP4621243A1 (fr) * 2024-03-19 2025-09-24 Volvo Car Corporation Système de soupape

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Publication number Priority date Publication date Assignee Title
EP0394140A1 (fr) * 1989-04-21 1990-10-24 I.C.F., S.A.R.L. Appareil de circulation et de distribution de fluide
DE4418153A1 (de) * 1994-05-25 1995-11-30 Wilo Gmbh Kreiselpumpe
US5924432A (en) * 1995-10-17 1999-07-20 Whirlpool Corporation Dishwasher having a wash liquid recirculation system
EP1403521A1 (fr) * 2002-09-26 2004-03-31 Nidec Shibaura Corporation Pompe à une entreé et à deux sorties

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Publication number Priority date Publication date Assignee Title
US5261786A (en) * 1991-03-05 1993-11-16 A. R. Wilfley & Sons, Inc. Actuator mechanism for pump sealing apparatus
DE102011086934A1 (de) * 2011-11-23 2013-05-23 Schaeffler Technologies AG & Co. KG Regelbare Kühlmittelpumpe mit einer elektro-hydraulischen Leitblechverstellung
EP2818726B1 (fr) * 2013-06-27 2017-08-23 Grundfos Holding A/S Pompe centrifuge avec roue à aubes déplaçable axialement pour l'alimentation de circuits différents
EP3150923B2 (fr) * 2015-10-02 2022-06-08 Grundfos Holding A/S Systeme hydraulique
EP3156659B1 (fr) * 2015-10-12 2020-09-16 Grundfos Holding A/S Pompe et système hydraulique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0394140A1 (fr) * 1989-04-21 1990-10-24 I.C.F., S.A.R.L. Appareil de circulation et de distribution de fluide
DE4418153A1 (de) * 1994-05-25 1995-11-30 Wilo Gmbh Kreiselpumpe
US5924432A (en) * 1995-10-17 1999-07-20 Whirlpool Corporation Dishwasher having a wash liquid recirculation system
EP1403521A1 (fr) * 2002-09-26 2004-03-31 Nidec Shibaura Corporation Pompe à une entreé et à deux sorties

Also Published As

Publication number Publication date
CN110418893B (zh) 2021-10-22
CN110418893A (zh) 2019-11-05
US11073161B2 (en) 2021-07-27
US20200116161A1 (en) 2020-04-16
WO2018167031A1 (fr) 2018-09-20
EP3376037B1 (fr) 2021-01-27

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