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WO2018166969A1 - Groupe motopompe - Google Patents

Groupe motopompe Download PDF

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Publication number
WO2018166969A1
WO2018166969A1 PCT/EP2018/056080 EP2018056080W WO2018166969A1 WO 2018166969 A1 WO2018166969 A1 WO 2018166969A1 EP 2018056080 W EP2018056080 W EP 2018056080W WO 2018166969 A1 WO2018166969 A1 WO 2018166969A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive motor
pump unit
valve element
control device
unit according
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.)
Ceased
Application number
PCT/EP2018/056080
Other languages
German (de)
English (en)
Inventor
Thomas 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 CN201880018500.4A priority Critical patent/CN110418895B/zh
Priority to US16/493,211 priority patent/US20200072227A1/en
Publication of WO2018166969A1 publication Critical patent/WO2018166969A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F04D15/0066—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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • 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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0207—Pumps

Definitions

  • the invention relates to a pump unit with an electric drive motor, at least one impeller rotatably driven by the electric drive motor and a control device which controls the drive motor.
  • a control device which controls the drive motor.
  • it is known to drive the drive motor via a control device with a frequency converter, so that the drive motor can be adjusted in its speed and regulated.
  • the speed range over which the speed is variable is limited.
  • the pump unit according to the invention has an electric drive motor and at least one impeller driven in rotation therewith.
  • the impeller may be connected in a known manner with the rotor of the drive motor.
  • the rotor is particularly preferably a permanent magnet rotor.
  • the drive motor as a wet-running electric drive motor with a split tube or split pot, which separates the rotor space from the stator, is formed. That is, the rotor preferably rotates in the fluid to be delivered by the pump unit.
  • the pump unit may preferably be designed as a circulating pump unit and more preferably as a heating circulation pump unit.
  • the control device of the drive motor which controls the drive motor and in particular controls the energization of stator coils in the stator of the drive motor, is designed such that it selectively drives the drive motor in at least one first or in a second operating mode.
  • the first mode is a conventional mode in which the drive motor is controlled by the controller such that the rotor of the drive motor rotates continuously over a plurality of revolutions. In this mode, the impeller is driven to produce the pressure and flow desired to operate the pump set.
  • the control device controls the drive motor in such a way that the rotor of the drive motor is moved only stepwise in at least one selected, in particular adjustable angle step, wherein these angular steps are preferably less than 360 degrees.
  • This rotation in at least one selected angular step serves to rotate the rotor to a desired angular position.
  • the drive motor in the second operating mode to take on additional drive functions and, in particular, actuating functions, as might otherwise be assumed, for example, by stepper motors.
  • the drive motor in the pump unit in addition to the drive of the impeller other functions, in particular control functions for moving other components take over, which only need to be moved over smaller ways.
  • the control device is designed such that the drive motor in the first operating mode rotates at a higher angular speed than in the second operating mode. This is advantageous for drive and positioning functions in which smaller movements are to be carried out with greater accuracy.
  • the control device is further preferably configured such that in the first operating mode, the drive motor is adjustable in its rotational speed and preferably controllable.
  • the drive motor in its control device preferably have a frequency converter, via which the speed of the drive motor is variable.
  • the control device is also preferably designed so that the drive motor is controlled in the second mode by the control device in an open loop, that is in the so-called open-loop operation, in which no position control is performed in the energization of the stator coils.
  • the induced reverse voltage (back-EMF) is not used in the control or regulation in open loop operation.
  • This control makes it possible to turn the drive motor at specific angles in a targeted manner by energizing the coils in the stator.
  • the stator can be provided in a known manner with a plurality of stator poles and associated stator coils, which are designed, for example, for three-phase operation.
  • the control device is designed such that in the second operating mode, the drive motor is controlled by the control device with a frequency ⁇ 10 hertz. That is, the stator coils are supplied with voltage or current with a frequency ⁇ 10 Hertz. Alternatively or additionally, a higher motor current than in the first mode is used. Thus, in the operating mode, a motor current can be used or For example, the stator coils can be supplied with a current which corresponds to two to four times the nominal current for which the drive motor is designed. Optionally, the current may also be higher than four times the nominal current. It is essentially only limited by the fact that no demagnetization of the rotor may occur.
  • control device is designed such that the number and / or the size of the individual angular steps in which the rotor is moved in the second operating mode are selectable. So it is possible to rotate the rotor targeted to a desired angular position.
  • control device selectively energizes the individual stator coils.
  • control device can be configured such that it controls the drive motor so that its direction of rotation in the second operating mode is opposite to the direction of rotation in the first operating mode. This makes it easier to use the different operating modes for different applications, since, in addition to the impeller, for example, further components could be coupled to the rotor via a direction-dependent coupling, so that in one direction of rotation only the rotor is driven, while in the other direction of rotation , which is preferably used in the second mode, even a further coupled component could be moved.
  • the pump unit preferably has a further movable component, which is coupled in addition to the at least one rotor via a releasable coupling with the rotor of the drive motor.
  • the coupling can act directly on the rotor, on a rotor shaft connected to the rotor or on the impeller, which is arranged rotationally fixed on the rotor shaft.
  • the at least one further movable component may for example be a valve element, wherein the valve element is preferably part of a mixing and / or switching valve.
  • Such a changeover valve can be, for example, a changeover valve which is used in a heating system in order to switch over the flow path between a heating circuit and a service water heat exchanger.
  • a mixing valve may for example be a mixing valve, as used in a heating system for the application to regulate the flow temperature of the heating medium by mixing in cooled heating medium.
  • the described coupling for coupling the at least one further movable component is preferably detachable depending on the direction of rotation, so that in one direction of rotation the additional component can be moved in the manner described while in the opposite direction of rotation, which is preferably used in the first mode, the
  • the impeller can rotate in normal operation and can perform a pumping function without being disturbed.
  • the impeller may have blades, which are adapted to these preferred for normal operation direction of rotation.
  • the mentioned coupling can be further preferably formed on a front end of the rotor shaft of the rotor.
  • the component to be moved then has a corresponding mating coupling, which can engage with this coupling.
  • the additional movable component is preferably also rotatable and more preferably rotatable about the same axis as the rotor shaft.
  • the coupling at the front end of the rotor shaft may in particular have a sawtooth profile, that is to say have a sawtooth profile in a development in the circumferential direction.
  • this profile has two slopes whose axially projecting end edges extend transversely to the axis of rotation of the rotor shaft along a diameter line.
  • engagement surfaces are created which lie in a plane parallel to the axis of rotation and to the diameter of the rotor shaft. extend. Facing away from these engagement surfaces, starting from the end edges of the profile, the bevels or wedge surfaces may extend, which in the opposite direction of rotation cause the clutch is pressed out of engagement. This disengagement occurs then by an axial displacement of the counter-coupling and / or the coupling on the rotor shaft.
  • the additionally rotationally moving component is a valve element, which is designed and arranged such that it can be moved in rotation between at least two switching positions.
  • the axis of rotation of the valve element is preferably aligned with the axis of rotation of the drive motor. This allows a simple construction of the coupling described.
  • the valve element is preferably additionally axially displaceable along its axis of rotation, wherein the axial displacement of the valve element, for example, a coupling, as described above, can be disengaged.
  • the valve element is arranged in the pump unit such that it has a pressure surface on which an output side of the at least one impeller prevails pressure. That is, the pressure surface preferably adjoins the pressure space in which the impeller rotates. Furthermore, the valve element is preferably movably mounted in a direction transverse to the pressure surface between an abutment position in which it bears against at least one abutment surface and a released position in which it is detached or spaced from the abutment surface.
  • the movement path, along which the valve element is movable between the adjacent position and the released position preferably differs from the movement path between the at least two switching positions of the valve element.
  • Switzerland ⁇ is the valve element along the axis of rotation about which it is movable between the switching positions, axially movable.
  • a restoring or biasing element which generates a restoring force, which is directed opposite to the pressure force generated by the pressure on the pressure surface.
  • a return element may for example be a spring.
  • the return element is preferably arranged so that the restoring force generated presses the valve element in the released position.
  • the valve element In the released position, the valve element is preferably substantially freely movable and in particular rotatable, so that it can be moved easily between its switching positions. In the adjacent position, however, the valve element is preferably held non-positively and / or positively on the contact surface, so that it is fixed in its assumed switching position.
  • the at least one contact surface may preferably be a sealing surface at the same time.
  • the pump unit according to the invention makes it possible to drive the drive motor according to a novel method, which is also the subject of the invention.
  • the second operating mode is preferably used to move an additional component, in particular a valve element, into a desired position, in particular a desired angular position with respect to a rotation axis.
  • the open-loop operation is used to control the drive motor.
  • the rotor and the rotatable valve Elemen ⁇ provided a direction-dependent coupling, as described above.
  • the coupling is designed so that it engages in at least one angular position, in the embodiment described above in two angular positions offset by 180 °. Since, in normal operation in the first operating mode, the clutch is disengaged in the manner described above by the pressure prevailing in the pressure chamber, it is not certain when changing to the second operating mode that the valve element has not shifted slightly.
  • the drive motor is not rotated exactly in the angular position in which he was at the last time the end of the second mode of operation, but in an angular position moves, which is set back by a certain amount.
  • this orientation of the rotor initially takes place in an angular position slightly before the angular position in which the rotor was located when the second operating mode was last taken out of operation. This ensures that in the further rotation, the clutch engages in any case and the valve element is moved in the desired manner.
  • the rotor is then rotated by the control device by corresponding energization of the stator coils in the manner described above in exactly the desired new angular position.
  • This is preferably time-controlled in that the stator is supplied with a predetermined frequency for a period of time determined by the control device, the frequency preferably being in the very low range mentioned above.
  • the valve element in the achieved Switch position is held.
  • FIG. 1 is an exploded view of the centrifugal pump assembly according to a ninth embodiment of the invention.
  • FIG. 2 is a perspective view of the Kreiselpumpenaggrega- tes of FIG. 1 with removed pump housing and valve element,
  • FIG. 3 shows a perspective view of the motor shaft of the centrifugal pump assembly according to FIGS. 1 and 2 and of the coupling part of the valve element
  • FIG. 4 shows a sectional view of the centrifugal pump assembly according to FIG
  • FIG. 5 shows a sectional view according to FIG. 4 with the valve element in a second position
  • FIG. 7 shows a view according to FIG. 6 with the valve element in a second switching position
  • FIG. 8 shows a view according to FIGS. 6 and 7 with the valve element in a third switching position
  • FIG. 9 schematically shows the hydraulic construction of a heating system with a centrifugal pump assembly according to FIGS. 1 to 8, FIG.
  • FIG. 10 is an exploded view of a centrifugal pump assembly according to a second embodiment of the invention.
  • Hg. 1 1 is a perspective view of the open valve element of the centrifugal pump assembly of FIG. 10,
  • FIG. 12 is a perspective view of the closed valve element of FIG. 1 1,
  • Fig. 13 is a sectional view of the centrifugal pump assembly according to
  • FIG. 14 shows a sectional view according to FIG. 13 with the valve element in a second position
  • Fig. 15 is a plan view of the open pump housing of
  • FIGS. 10 to 14 Centrifugal pump assemblies according to FIGS. 10 to 14 with the valve element in a first switching position
  • FIG. 16 a view according to FIG. 15 with the valve element in a second switching position
  • 17 shows a view according to FIGS. 15 and 16 with the valve element in a third switching position
  • FIG. 18 is a view according to FIGS. 15 to 17 with the valve element in a fourth switching position and FIG. 19 is a schematic view of the hydraulic structure of a heating system with a centrifugal pump assembly according to FIGS
  • centrifugal pump assembly according to the invention described in the following description relate to applications in heating and / or air conditioning systems in which a liquid heat carrier, in particular water, is circulated by the centrifugal pump unit.
  • the centrifugal pump assembly 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 controls an electronic control device 17 for controlling the electric drive motor in the pump housing 2 includes.
  • the electronics housing 1 6 could be arranged in a corresponding manner also 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 circumference.
  • the valve element 18 separates in the pump housing 12 a suction chamber 24 from a pressure chamber 26.
  • a suction chamber 24 In the pressure chamber 26 rotates the impeller 14.
  • the pressure chamber 26 is connected to the pressure port or discharge nozzle 27 of the centrifugal pump assembly, which forms the outlet of the centrifugal pump assembly.
  • a mechanical coupling between the drive motor and the valve element is provided, wherein in these embodiments, the drive motor of the control device 1 7 in two different operating modes or operating modes can be controlled.
  • a first operating mode which corresponds to the normal operation of the circulating pump unit
  • the drive motor rotates in a conventional manner with a desired speed, which can be set in particular by the control device 17.
  • the second operating mode the drive motor is activated in open-loop mode, so that the rotor can be rotated stepwise in individual predetermined by the controller 17 angular steps, which are smaller than 360 °, can be rotated.
  • the drive motor in the manner of a stepping motor can be moved in individual steps, which is used in these embodiments, the valve element targeted to move in small angular increments in a defined position, as will be described below.
  • a mixing valve is integrated in the pump housing 2, as can be used, for example, to set the temperature for underfloor heating.
  • the motor housing 2 with the electronics housing 16 corresponds to the embodiment described above.
  • the pump housing 12 has, in addition to the pressure port 27, two suction-side ports 32 and 34 which open at the bottom of the pump housing 12 in inputs 28 and 30, which are located in a plane transverse to the axis of rotation X.
  • the valve element 18 is drum-shaped and consists of a pot-shaped lower part 76, which is closed on its side facing the impeller 14 by a cover 78. In the central region of the lid 78, a suction opening 36 is formed. The suction opening 36 is in engagement with the suction mouth 38 of the impeller 14.
  • the valve element 18 is rotatably mounted on an axle 20, which is arranged in the bottom of the pump housing 12. The axis of rotation of the valve element 18 corresponds to the axis of rotation X of the rotor shaft 8.
  • the valve element 18 is also axially displaceable along the axis X and is pressed by a spring 48 in the rest position shown in Fig.
  • valve element 18 in a dissolved Position is in which the lower part 76 is not applied to the bottom of the pump housing 12, so that the valve element 18 is substantially free to the axis 20 is rotatable.
  • the front end of the rotor shaft 8 which is designed as a coupling 108.
  • the clutch 108 engages with a counter-coupling 1 10, which is arranged non-rotatably on the valve element 18 in engagement.
  • the coupling 108 has tapered coupling surfaces, which essentially describe a sawtooth profile along a circumferential line in such a way that torque transmission from the coupling 108 to the counter-coupling 110 is possible only in one direction of rotation, namely in the direction of rotation A in FIG. 3.
  • the direction of rotation B is the direction of rotation in which the pump unit is driven in normal operation.
  • the direction of rotation A is used for targeted adjustment of the valve element 18. That is, here is a direction of rotation dependent coupling is formed.
  • the counter-coupling 1 10 of the clutch 108 by the pressure in the pressure chamber 26 is disengaged. If the pressure in the pressure chamber 26 increases, a pressure force acting on the cover 78 which opposes and exceeds the spring force of the spring 48, so that the valve element 18 is pressed into the abutting position, which is shown in Fig. 4.
  • the lower part 76 rests on the bottom side of the pump housing 12, so that on the one hand the valve element 18 is frictionally held and on the other hand a tight contact is achieved, which seals the pressure and the suction side against each other in the manner described below.
  • the suction port 32 opens at the inlet 28 and the suction port 34 opens at the inlet 30 in the bottom of the pump housing 12 in the interior, that is, the suction chamber 24 into it.
  • the lower part 76 of the valve element 18 has in its bottom a bow-shaped opening 1 12, which extends substantially over 90 °.
  • Fig. 6 shows a first switching position, in which the opening 1 12th only the input 30 is covered, so that a flow path is given only from the suction port 34 to the suction port 36 and thus to the suction port 38 of the impeller 14.
  • the second input 28 is sealed by the voltage applied in its peripheral region bottom of the valve element 18.
  • Fig. 8 shows the second switching position in which the opening 1 12 covers only the input 28, while the input 30 is closed.
  • FIG. 7 now shows an intermediate position in which the opening 1 12 covers both inputs 28 and 30, wherein the input 30 is only partially released.
  • a mixing ratio between the flows from the inputs 28 and 30 can be changed.
  • about the stepwise adjustment of the rotor shaft 8 and the valve element 18 can be adjusted in small steps to change the mixing ratio.
  • Such functionality may be used, for example, in a hydraulic system as shown in FIG.
  • the centrifugal pump assembly with the integrated valve, as described above, characterized by the dashed line 1 is marked.
  • the hydraulic circuit has a heat source 1 14 in the form of, for example, a gas boiler, whose output opens into, for example, the suction port 34 of the pump housing 12.
  • a floor heating circuit 1 1 6 connects to the pressure port 27 of the centrifugal pump assembly 1, whose return is connected both to the input of the heat source 1 14 and to the suction port 32 of the centrifugal pump unit.
  • a further heating circuit 120 can be supplied with a heat carrier, which has the output-side temperature of the heat source 1 14.
  • the floor heating circuit 1 1 6, however, can be regulated in its flow temperature in such a way that cold water from the return to the hot water on the output side of the heat 14 is mixed by changing the opening ratios of the inputs 28 and 30 in the manner described above, the mixing ratio can be changed by rotation of the valve element 18h.
  • the second embodiment according to FIGS. 10 to 19 shows a centrifugal pump unit which, in addition to the above-described mixer functionality, also has a switching functionality for the additional supply of a secondary heat exchanger for heating service water.
  • the bearing and the drive of the valve element 18i in this embodiment are the same as in the ninth embodiment.
  • valve element 18i in addition to the opening 1 12 a passage 122 which extends from an opening 124 in the lid 78i to an opening in the bottom of the lower part 76i and thus connects the two axial ends of the valve element 18i together , Furthermore, in the valve element 18i, an arcuate bypass opening 126, which is open only to the underside, that is, to the bottom of the lower part 76i and thus to the suction chamber 24, is formed, which is closed to the pressure chamber 26 by the cover 78i.
  • the pump housing 12 has, in addition to the pressure port 27 and the two previously described suction ports 34 and 32, a further port 128.
  • the connection 128 opens into an inlet 130 in the bottom of the circulating pump unit 12 in addition to the inputs 28 and 30 into the suction chamber 24.
  • the opening 12 lies above the inlet 130, so that a flow connection is created from the connection 128 to the suction opening 36 and via this into the suction mouth 38 of the impeller 14.
  • a further switching position which shows Fig. 17, the opening 1 12 is located above the input 30, so that in turn a flow connection from the suction port 34 is given to the suction port 38 of the impeller 14.
  • a partial overlap of the opening 124 and the through hole 122 with the input 28 takes place, so that a connection between the pressure chamber 26 and the suction port 32 is made, which acts as a pressure port.
  • the bypass opening 126 simultaneously covers the input 130 and a part of the input 28, so that a connection is also provided from the terminal 128 via the input 130, the bypass opening 126 and the input 28 to the terminal 32.
  • FIG. 18 shows a fourth switching position in which the through-channel 122 completely covers the input 28, so that the connection 32 is connected to the pressure space 26 via the through-channel 122 and the opening 124.
  • the bridging opening 126 only covers the entrance 130.
  • the opening 12 also covers the entrance 30.
  • Such a centrifugal pump unit can be used, for example, in a heating system as shown in FIG. There, the dashed line bounds the centrifugal pump unit 1, as has just been described with reference to FIGS. 10 to 18.
  • the heating system in turn has a primary heat exchanger or a heat source 1 14, which may be, for example, a gas boiler.
  • the flow path runs in a first heating circuit 120, which may be formed for example by conventional radiators or radiators.
  • a flow path branches off to a secondary heat exchanger 56 for heating service water.
  • the heating system further comprises a floor heating circuit 1 1 6.
  • the returns of the heating circuit 120 and the floor heating circuit 1 1 6 open into the suction port 34 on the pump housing 12.
  • the return from the secondary heat exchanger 56 opens into the port 128, which, as will be described below, offers two functionalities.
  • the connection 32 of the pump housing 12 is connected to the flow of the floor heating circuit 1 1 6.
  • valve element 18i When the valve element 18i is in the first switching position shown in FIG. 15, the impeller 14 conveys liquid from the suction port 34 via the pressure port 27 through the heat source 140 and the heating circuit 120 and back to the suction port 34 If the valve element 18i in the second switching position, which is shown in FIG. 16, the system is switched to service water operation, in this state, the pump unit or the impeller 14 delivers fluid from the port 128, which serves as a suction port, through the pressure port 27 , Via the heat source 1 14 through the secondary heat exchanger 56 and back to the terminal 128. If the valve element 18i in the third switching position, which is shown in Fig. 1 7, in addition the floor heating circuit 1 1 6 is supplied.
  • the water flows into the suction mouth 38 of the impeller 14 and is conveyed via the pressure connection 27 via the heat source 14 in the manner described by the first heating circuit 120.
  • the liquid emerges on the output side of the impeller 14 from the pressure chamber 26 into the opening 124 and through the through-passage 122 and thus flows to the terminal 32 and via this into the underfloor heating circuit 16.
  • liquid flows via the connection 128 and the inlet 130 into the connection 32 at the same time via the bridging opening 126. That is to say, water flows through the heat exchanger 14 through the secondary heat exchanger 26 and the connection 128 to the terminal 32.
  • Fig. 18 shows a switching position in which the admixture is switched off and the terminal 32 is exclusively in communication with the pressure chamber 26 directly. In this condition, the water in the floor circle 1 1 6 is conveyed in a circle without heat supply.
  • the rotor 6 is preferably initially positioned in the second operating mode when the control unit 17 is changed again so that the control device 17 Rotor 6 by appropriate control of the stator 4 is not quite up to the stored angular position rotates, but preferably shortly before stops. Ie. In a first step, when the second operating mode is started, the rotor 6 is rotated into a previously stored angular position or into an angular position which is slightly ahead of the last stored angular position in the direction of rotation.
  • the rotor can be rotated together with the valve element 18, 18i into a desired second angular position, wherein the control device 17 controls the stator 6 in such a way that the rotor 6 rotates exactly at the desired angle in this second mode of operation.
  • the counter coupling 1 10 is taken over the clutch 108, so that the valve element 18, 18i is then rotated to the desired angular position.
  • the rotor 6 is stopped and the controller 17 switches back to the first mode or the first mode of operation and starts the rotor 6 in the opposite direction of rotation, so that the clutch 108 of the counter-clutch 1 10 can disengage and incidentally by the axial displacement of the valve element 18, 18i by the pressure generated in the pressure chamber 26, the clutch 108 and the counter-coupling 1 10 completely disengage and the valve element 18, 18i is held by engagement with the bottom of the pump housing 12 in the switching position reached.
  • the coupling 108 has two slopes or wedge surfaces 132 which extend from two end edges 134, which in Substantially in the diametrical direction with respect to the axis of rotation X run.
  • engagement surfaces 136 extend, which extend essentially in a plane which is spanned by the rotation axis X and a diameter line to this rotation axis X.
  • the mating coupling 10 has a web-shaped projection 138 extending in the diameter direction with respect to the axis of rotation X, which protrudes in the axial direction and has two substantially mutually parallel side surfaces, which in turn extend in planes which are essentially of the diameter line and the axis of rotation X. or be clamped to these parallel axes.
  • the side surfaces of the projection 138 engage the engagement surfaces 136 when the clutch is engaged.
  • the pump housing 12 is integrally formed.
  • the pump housing can also be designed in several parts.
  • a separate from the pump housing valve housing may be provided, in which the valve element described is arranged, while in the pump housing, only the impeller is arranged.
  • Such a valve and pump housing can be connected to each other in a suitable manner.

Landscapes

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

Abstract

L'invention concerne un groupe motopompe comprenant un moteur d'entraînement électrique, au moins une roue mobile (14) entraînée en rotation par le moteur d'entraînement électrique ainsi qu'un dispositif de commande (17) qui pilote le moteur d'entraînement. Le dispositif de commande (17) est réalisé de telle manière qu'il pilote le moteur d'entraînement au choix dans au moins un premier ou un deuxième mode de fonctionnement. Dans le premier mode de fonctionnement, le moteur d'entraînement est commandé par le dispositif de commande (17) de telle manière qu'un rotor (6) du moteur d'entraînement tourne en continu. Dans le deuxième mode de fonctionnement, le moteur d'entraînement est commandé par le dispositif de commande (17) de telle manière que le rotor (6) du moteur d'entraînement continue à se déplacer progressivement selon des pas angulaires choisis de préférence inférieurs à 360°.
PCT/EP2018/056080 2017-03-14 2018-03-12 Groupe motopompe Ceased WO2018166969A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880018500.4A CN110418895B (zh) 2017-03-14 2018-03-12 泵机组
US16/493,211 US20200072227A1 (en) 2017-03-14 2018-03-12 Pump assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17160832.6 2017-03-14
EP17160832.6A EP3376040B1 (fr) 2017-03-14 2017-03-14 Groupe motopompe

Publications (1)

Publication Number Publication Date
WO2018166969A1 true WO2018166969A1 (fr) 2018-09-20

Family

ID=58347143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/056080 Ceased WO2018166969A1 (fr) 2017-03-14 2018-03-12 Groupe motopompe

Country Status (4)

Country Link
US (1) US20200072227A1 (fr)
EP (1) EP3376040B1 (fr)
CN (1) CN110418895B (fr)
WO (1) WO2018166969A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3719326A1 (fr) * 2019-04-05 2020-10-07 Perkins Engines Company Limited Pompe à eau comportant deux ports de retour

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12311324B2 (en) 2022-02-25 2025-05-27 Grundfos Holding A/S Pump device with a centrifugal pump and a mixing unit
US12297843B2 (en) * 2022-06-08 2025-05-13 Cooper-Standard Automotive Inc. Multiport fluid pump with integrated valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1958277B1 (de) * 1969-11-20 1971-02-25 Karl Schichl Umwaelzpumpe fuer warmwasser heizungsanlagen mit einem im pumpengehaeuse angeordneten vierwegemischerventil
EP3067564A1 (fr) * 2015-03-09 2016-09-14 Grundfos Holding A/S Groupe motopompe de circulation
US20160268937A1 (en) * 2013-11-12 2016-09-15 Denso Corporation Drive control device and fuel pump drive system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103953542B (zh) * 2014-05-17 2017-08-08 王洪继 一种叶片泵
CN105464919B (zh) * 2016-01-20 2017-12-26 江苏雷利电机股份有限公司 泵及应用该泵的自动投放系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1958277B1 (de) * 1969-11-20 1971-02-25 Karl Schichl Umwaelzpumpe fuer warmwasser heizungsanlagen mit einem im pumpengehaeuse angeordneten vierwegemischerventil
US20160268937A1 (en) * 2013-11-12 2016-09-15 Denso Corporation Drive control device and fuel pump drive system
EP3067564A1 (fr) * 2015-03-09 2016-09-14 Grundfos Holding A/S Groupe motopompe de circulation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3719326A1 (fr) * 2019-04-05 2020-10-07 Perkins Engines Company Limited Pompe à eau comportant deux ports de retour
US11060441B2 (en) 2019-04-05 2021-07-13 Perkins Engines Company Limited Water pump with twin return ports

Also Published As

Publication number Publication date
CN110418895A (zh) 2019-11-05
CN110418895B (zh) 2020-11-20
EP3376040B1 (fr) 2019-10-30
EP3376040A1 (fr) 2018-09-19
US20200072227A1 (en) 2020-03-05

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