EP3376036A1 - Groupe motopompe - Google Patents

Groupe motopompe Download PDF

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Publication number
EP3376036A1
EP3376036A1 EP17160835.9A EP17160835A EP3376036A1 EP 3376036 A1 EP3376036 A1 EP 3376036A1 EP 17160835 A EP17160835 A EP 17160835A EP 3376036 A1 EP3376036 A1 EP 3376036A1
Authority
EP
European Patent Office
Prior art keywords
valve element
centrifugal pump
drive motor
valve
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.)
Withdrawn
Application number
EP17160835.9A
Other languages
German (de)
English (en)
Inventor
Thomas 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 EP17160835.9A priority Critical patent/EP3376036A1/fr
Priority to PCT/EP2018/056213 priority patent/WO2018167047A1/fr
Publication of EP3376036A1 publication Critical patent/EP3376036A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • 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
    • 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
    • F04D13/028—Units comprising pumps and their driving means the driving means being a planetary gear
    • 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 centrifugal pump assembly with a drive motor, at least driven by this impeller and a valve device which has a movable by the drive motor valve element.
  • a centrifugal pump unit is known in the pump housing, a valve element is integrated to switch the conveying path of the centrifugal pump assembly between two possible flow paths.
  • the valve element is rotatable via the drive motor by means of a releasable coupling.
  • an additional locking device is required in order to position the valve element accurately. More precise control tasks are difficult to implement with such a valve element.
  • the centrifugal pump unit according to the invention has a drive motor, in particular an electric drive motor, which drives at least one impeller rotationally.
  • the drive motor is preferably designed as a wet-running electric drive motor with a split tube or containment shell between the stator and the rotor space, so that the rotor rotates in the liquid to be conveyed.
  • Such a centrifugal pump unit can be designed in particular for use as a circulation pump unit and more preferably as a heating circulation pump unit.
  • the centrifugal pump assembly according to the invention also has a valve device with a valve element, which is movable by the drive motor, which also drives the impeller.
  • the valve device is preferably integrated into the pump housing of the centrifugal pump assembly, in which also the impeller rotates.
  • a transmission is provided which is designed such that a movement speed and / or a movement direction between the drive motor and the valve element is changed.
  • the valve element is moved slower and / or in a different direction than the drive motor, resulting in improved opportunities for accurate adjustment of the valve element and thus improved and new switching functions of the valve element.
  • valve element can be moved much more precise. This is advantageous for control tasks in which a flow is to be regulated by a flow path.
  • the transmission is designed such that it converts a rotational movement of the drive motor into a linear movement of the valve element, wherein the linear movement is preferably carried out in the direction of the axis of rotation of the drive motor.
  • the direction of movement from a rotary movement into a linear movement has the advantage that significantly longer adjustment paths for the valve element can be realized, which in turn allow other or more switching functions and / or enable a more accurate positioning of the valve element in its various switching positions.
  • the transmission can be further preferably designed so that it generates a linear movement in addition to the rotational movement, so that the valve element rotates and moves linearly.
  • the transmission may for example be a spindle drive, wherein more preferably the valve element via a thread with a fixed spindle is engaged. Ie. the valve element rotates on the spindle. Conversely, a spindle could turn in a fixed nut.
  • the valve element can be driven in rotation by the drive motor and then moves linearly during its rotational movement on the spindle or with the spindle.
  • the valve element is further preferably designed so that the switching or setting functions, which is to accomplish the valve element, are ideally caused by the linear movement.
  • the spindle can be firmly anchored in the pump housing.
  • the spindle preferably extends in the direction of rotation of the drive motor in alignment with the axis of rotation of the drive motor.
  • valve element is particularly preferably movable linearly between at least two switching positions. This allows a longer Verstellweg between the different switching positions and / or better controllability of the positioning of the valve element in comparison to switching positions, which would be defined by different angular positions of the valve element.
  • the transmission can be designed such that it converts a rotational movement of the drive motor into a rotational movement of the valve element with preferably reduced speed.
  • This embodiment also allows a more accurate positioning of the valve element in its switching position, since it can be achieved via such a transmission that the drive motor has to perform a plurality of revolutions, for example, to cause a rotational movement of the valve element, which is smaller than 360 °. This simplifies the control of the drive motor and at the same time allows good control or regulation of the positioning of the valve element.
  • the valve element is rotatable about an axis of rotation between at least two switching positions, wherein this axis of rotation is preferably aligned with the axis of rotation of the drive motor.
  • Such rotation between two switching positions may alternatively be provided in addition to a linear mobility between two switching positions or in addition to this.
  • a precise control or regulation of the position of the valve element is possible even with a rotational movement between two switching positions.
  • a bearing of the valve element and / or the transmission is encapsulated, wherein the elements are preferably surrounded by a sleeve, in particular an elastic sleeve.
  • a cuff may be formed, for example, as a bellows.
  • the encapsulation has the advantage that the transmission and / or the storage can basically be arranged in the region of the flow paths of the pump unit or the valve device in the liquid to be conveyed, but at the same time be protected from contamination in this liquid.
  • the bearings and / or the gearbox can be prelubricated or also permanently lubricated.
  • the storage and / or the transmission are lubricated by the fluid to be pumped itself, in which case the enclosure can be designed so that the liquid, preferably free of impurities penetrate into the bearing and / or gear compartment can and there, for example, long-term dilute or replace a previously filled lubricant.
  • the spindle is surrounded by an elastic sleeve, such as a bellows, which encapsulates the spindle and protects against contamination in the fluid to be delivered.
  • the elasticity or the folds make it possible for the sleeve to change in length as a function of the linear positioning of the valve element.
  • the valve device may preferably be designed as a switching valve and / or as a mixing valve.
  • a switching valve can for example be used in a heating system to direct the flow path for the heating medium or the heat carrier either by heating circuits for space heating or a heat exchanger for domestic water heating.
  • a switching valve could also be designed as a distributor valve in order to selectively open or close various heating circuits, ie to distribute the heat carrier to different heating circuits.
  • the valve device can be designed so that a plurality of valve openings can be opened simultaneously in order to supply several heating circuits targeted simultaneously with a heat carrier can.
  • valve device may have the functionality of a mixing valve, for example in order to mix two liquid flows and thereby be able to change the mixing ratio.
  • a mixing valve for example in order to mix two liquid flows and thereby be able to change the mixing ratio.
  • Such applications are used, for example, in heating systems Application to adjust the temperature of a heat carrier.
  • it is customary to mix heat transfer medium from the return line, ie, cold heat transfer medium, with the heat transfer medium in order to be able to purposefully lower the flow temperature.
  • the valve element of the valve device may be located in the centrifugal pump assembly according to the invention in a flow path through the centrifugal pump assembly upstream or downstream of the impeller, d. H. Perform switching functions on the pressure side or the suction side of the impeller. According to particular embodiments, it is also possible to arrange the valve element so that it communicates with a flow path upstream and a flow path downstream of the valve element and thus can take over switching functions both on the suction side and on the pressure side.
  • the valve device may according to another preferred embodiment, for example, have two inputs and one output, wherein the valve element between at least two switching positions is movable, in which the two inputs are opened differently.
  • This is an embodiment of a mixing valve.
  • the switching positions By changing the switching positions, the ratio of the free cross sections of the two inputs to each other can be varied so that the flows through the two inputs in different mixing ratios can be mixed together and then fed to the output.
  • more than two switch positions are preferably provided.
  • the valve element can be moved continuously between two switching positions acting as end positions. In one of the two end positions, a first input can be opened and a second input can be closed and in the second end position, conversely, a first input closed and the second entrance to be open.
  • both inputs are opened in changeable relationship to each other.
  • a valve device can be arranged on the pressure side or alternatively also on the suction side of the impeller, depending on where in the heating circuit such a centrifugal pump unit is to be positioned.
  • the valve element is further preferably coupled to the drive motor via a magnetic, mechanical and / or hydraulic clutch, wherein preferably the transmission between the clutch and the valve element is arranged or the valve element is mounted in a transmission.
  • a mechanical coupling can be realized by a positive and / or positive engagement of two coupling elements.
  • a hydraulic coupling can be realized in particular via the liquid to be delivered itself. In a pressure chamber of the pump housing, which surrounds the impeller, the fluid flow is also set in rotation during rotation of the impeller. This rotational movement of the liquid can be transmitted to a rotatable valve element or a rotatable drive of a valve element, so that the valve element or its drive is rotated.
  • valve element itself is rotated, this can for example be mounted on a spindle, so that it rotates on the spindle while doing a linear movement.
  • a separate drive element is provided, which in this way is hydraulically or also magnetically or mechanically coupled to the drive motor
  • the transmission can be arranged between the drive element and the valve element in order to change the movement speed and / or the direction of movement from the drive element to the valve element ,
  • the valve element can rotate slower than the drive element and thus the drive motor.
  • the transmission could be designed so that the valve element performs a linear movement, while the drive element and the drive motor only perform a rotary motion.
  • the combination of a transmission with a hydraulic coupling between the valve element and the drive motor, as described above, is particularly advantageous.
  • a precise positioning of the valve element may be difficult.
  • the positioning is improved via the transmission, since the transmission can be designed so that only a relatively small distance of the valve element is covered with a plurality of revolutions of the drive motor.
  • the coupling described is further preferably designed to be detachable so that it is rotational direction dependent, speed-dependent, pressure-dependent and / or by slip solvable.
  • a releasability of the coupling has the advantage that after reaching a certain switching position of the valve element, the clutch can be released and the drive motor can then drive only the impeller to go into the normal pump operation. This can then be done for example by changing the direction of rotation or speed change, in particular speed increase. By increasing the number of revolutions, the output-side pressure of the impeller can also be increased, so that the release of the clutch can then be caused by this pressure increase.
  • the drive motor is preferably provided with a control device, via which the drive motor can be adjusted in its rotational speed and preferably regulated. More preferably, the control device is designed so that it can accelerate or decelerate the drive motor also different degrees. Alternatively or additionally, the control device may be designed so that the drive motor can rotate selectively in different directions of rotation. The control device is designed so that it by appropriate control the drive motor thus controls or regulates the switching function of the valve device.
  • the control device can have at least one sensor connection via which a sensor signal, for example a temperature sensor, is received as the basis for regulating the valve position.
  • the centrifugal pump assembly on a holding device which cooperates with the valve element and is adapted to hold the valve element in an achieved switching position, wherein the holding device is preferably formed depending on pressure in and disengageable.
  • the holding device thus acts as a second clutch, which serves to hold the valve element in a desired switching position.
  • Such functionality can be achieved, for example, in that the valve element is movable between a released and an adjacent position, in which the valve element rests on at least one contact surface in such a way that it is held positively and / or positively. In the released position, this holding force is canceled and the valve element preferably spaced from the contact surface or it can slide along the contact surface.
  • Such a movement can, for example, be realized as a function of pressure by selecting the direction of movement between the released and the adjacent position so that the movement can be caused by a pressure force which is caused by the pressure prevailing in the pressure chamber. Contrary to the pressure force preferably acts a restoring force, which presses the valve element in the rest position in the released position.
  • This can be realized for example by a compression spring.
  • the valve element has a pressure area, which surrounds the impeller, facing pressure surface on which the pressure in the pressure chamber acts.
  • This pressure surface may be an annular surface surrounding a suction opening which engages the suction mouth of the impeller.
  • the contact surface As has been described, further preferably serves as a sealing surface, which forms, for example, the valve seats, so that the valve element can preferably be simultaneously pressed sealingly against these valve seats.
  • the valve element further preferably has an engagement surface or is connected to an engagement surface which delimits a pressure space surrounding the impeller and to which a pressure prevailing in the pressure chamber and / or a flow prevailing in the pressure space acts.
  • the attack surface can be moved together with the flow, so that the valve element or a drive element on which the attack surface is formed, are moved by the flow and in particular rotated. This rotational movement is then optionally transmitted via a transmission to the valve element in order to move this specifically between its switching positions. If the pressure acts on this or another attack surface, this can be used in the manner described, for example, to selectively move the valve element in the sense of a second clutch between a dissolved and an adjacent position.
  • the valve element can be held in an reached switching position by pressure increase, which can be caused by speed increase of the drive motor.
  • the drive motor is preferably first driven at a lower speed to move the valve member. After reaching the switching position, the pressure is then increased to keep the valve element in the achieved switching position, for example, by abutment against a contact surface.
  • the function of the holding device can also be caused by a blocking of the transmission or the spindle drive.
  • the valve member rotatably on a Spindle is arranged and acts on the valve element via a pressure surface an axial force in the longitudinal direction of the spindle, this leads to higher contact forces in the spindle drive, which lead with an appropriate choice of the pitch and the configuration of the spindle drive to an inhibition in the spindle drive and thus for fixing the valve element can.
  • the engagement surface on which a pressure acts in the pressure chamber further preferably extends transversely to a movement path along which the valve element is movable between the described applied and the released position. If, as described, a restoring element or pretensioning element is provided which generates a prestressing force or restoring force, then this also preferably acts in a direction opposite to the engagement surface of the pressure force acting on the engagement surface.
  • the centrifugal pump unit according to Fig. 1 has a stator or motor housing 2 with an electric drive motor arranged therein.
  • the electric drive motor has a stator 4 with a rotating rotor 6 therein, which is fixed to a rotor shaft 8.
  • the drive motor is designed as a wet-running motor with a can 10 between the stator and the rotor space.
  • a pump housing 12 Connected to the motor housing 2 is a pump housing 12, which simultaneously forms a valve housing for a valve device described below.
  • the impeller 14 is arranged, which is non-rotatably attached to the rotor shaft, so that it rotates together with the rotor 6.
  • an electronics housing 16 is arranged with control electronics or control device 18 arranged therein for controlling the drive motor.
  • the impeller 14 is surrounded in the pump housing by a pressure chamber 20, which opens into a pressure port 22 of the pump housing.
  • the pump housing 12 has four further connections 24, 26, 28 and 30, which each open into an opening on the inner circumferential wall of the pump housing 12.
  • a drum-shaped valve member 32 is arranged, which is formed from a cup-shaped lower part 34 and a lid 36 which closes this at its open axial end.
  • the cover 36 has a central suction opening 38 into which the impeller 14 engages with its suction mouth 40.
  • the peripheral surface surrounding the suction opening 38 forms a pressure or attack surface which limits the pressure chamber 20 on an axial side in the peripheral region of the suction mouth 40. Ie. on this surface of the lid 36 can prevail in the peripheral region of the impeller 14 Flow and the pressure in the pressure chamber 20 act.
  • the cover 36 also has in the mentioned pressure surface on a pressure port 42, to which a pressure channel 44 connects in the interior of the lower part 34.
  • This pressure channel 44 opens to the outer circumference of the valve element 32 in a first circumferential groove 46.
  • the circumferential groove 46 extends fully around the outer circumference of the valve element 32 and its lower part 34.
  • Axially staggered extends around the outer periphery of the valve element 32 and its lower part 34 a second annular circumferential groove 48, which is open via an opening 50 to the interior of the valve element 32 and thus fluidly connected to the suction port 38.
  • the lower part 34 of the valve element 32 also has an inlet opening 52 at its bottom, which is also open to the interior.
  • the bottom is the end 36 of the cover facing away from the valve element 32, which faces a bottom at the axial end of the pump housing 12.
  • the valve member 32 is rotatably disposed in the interior of the pump housing 12 about the rotational axis X of the impeller 14. From the bottom of the pump housing 12, a fixed spindle 54 extends in the direction of the longitudinal axis X into the interior of the pump housing 12. The spindle 54 engages in a central threaded hole 56 in the bottom of the lower part 34 of the valve element 32 a. A rotation of the valve element 32 about the longitudinal axis X leads to a rotation of the threaded hole 56 on the spindle 54, so that the valve member 32 simultaneously displaced in the axial direction X. By changing the direction of rotation, a reciprocating movement of the valve element 32 can be achieved.
  • the spindle 54 is surrounded on the outside of the valve element 32 by a first bellows 58 and in the interior of the valve element 32 by a second bellows 60, which has a closed end face.
  • the spindle 54 is encapsulated or by the bellows 58 and 60 of the liquid in the interior of the valve element 32 and separated inside the pump housing 12 and in particular protected from contamination in the liquid.
  • a lubricant for lubricating the spindle drive can be arranged inside the sleeves or bellows 58, 60.
  • a first hydraulic coupling between the drive motor and the valve element 32 is provided for driving or for movement of the valve element 32, which acts such that in the pressure chamber 20 in the vicinity of the impeller 14 rotating flow to the cover 36 of the valve element 32 in such a way acts, that this is rotated by friction.
  • the control device 18 is designed so that it can drive the drive motor in two directions of rotation.
  • the valve element 32 can be rotated so that it moves on the spindle 54 along the longitudinal axis X to the impeller 14 to or from this.
  • the pressure in the pressure chamber 20 may rise to such an extent that it generates on the cover 36 a compressive force acting in the direction of the longitudinal axis X, which extends via the valve element 32 and the threaded hole 36 transmits to the threads of the spindle 54.
  • the valve element 32 is held in its reached switching position.
  • the coupling formed by the impeller 14 and the cover 36 disengages by slip.
  • the heating system has the described centrifugal pump unit 1, which in Fig. 6 is indicated by the dashed line and includes two valve means, which are realized by the valve element 32 includes.
  • the heating system also has a heat source 62, which may be, for example, a gas boiler.
  • a first heating circuit 64 and a second heating circuit in the form of a floor heating circuit 66 are provided.
  • a secondary heat exchanger 58 is arranged, which serves to heat domestic water.
  • the output of the heat source 62 opens via the node 70 directly into the first heating circuit 64, which has, for example, normal radiators or radiators.
  • the return of the heating circuit 64 opens into the port 24 on the pump housing 12.
  • the pressure port 22 of the pump housing 12 is connected to the input of the heat source 62, so that the circulating pump unit 1 via the pressure port 22, the heating medium, for example water, by the heat source 62, the heating circuit 64 and back into the terminal 24.
  • the underfloor heating circuit 66 also opens with its outlet into the return line, which is connected to the connection 24.
  • the entrance of the underfloor heating circuit 66 is connected to the connection 30 on the pump housing.
  • the return of the secondary heat exchanger, the flow diverging from the node 70 opens at the port 26 of the pump housing. Another connection from node 70 leads to port 28 on the pump housing.
  • valve element 32 can now take over the function in this system to switch the heating medium flow between the two heating circuits 64 and 66 on the one hand and the secondary heat exchanger 58 on the other side.
  • the valve member 32 may function as a mixer to regulate the temperature for the flow of the underfloor heating circuit 66 by heating medium from the return with heating medium from the flow, that is, the output side of the heat source 62 is mixed.
  • valve element 32 is in a first end position in abutment with the bottom of the pump housing 12, so that the inlet opening 52 of the valve element 32 is closed and thus a flow path from the port 24 into the interior of the valve element 32 and thus to the suction opening 38 is closed.
  • the second circumferential groove 48 is located above the opening of the port 26 so that communication is provided from the port 26 via the circumferential groove 48 and the port 50 into the interior of the valve element 32.
  • the impeller 14 through the suction port 18 suck liquid from the port 26.
  • Fig. 4 shows a switching position in which the valve member 32 is moved further towards the impeller 14.
  • the second circumferential groove 48 is no longer in register with the opening of the terminal 26, so that it is now blocked by a peripheral wall of the lower part 34 of the valve element 32.
  • the flow path through the secondary heat exchanger 68 is closed.
  • the inlet opening 52 is lifted off the bottom of the pump housing 12, so that a connection is created from the connection 24 via the inlet opening 52 into the interior of the valve element 32 and thus to the suction opening 38.
  • first circumferential groove 46 covers the opening of the port 28, through which heated water from the node 70 enters. Ie. in the first circumferential groove 46 cold water from the return and hot water from the flow are mixed.
  • the opening to the terminal 28 can also be completely closed, so that only not heated water would be promoted by the underfloor heating circuit 66 in a circle.
  • a temperature control can be effected by the control device 18, by corresponding drive of the drive motor, moving the valve element 32 back and forth in the direction of the longitudinal axis X. This is preferably done at a lower speed than the usual operating speed of the impeller 14. Via the spindle 54, the rotational movement of the valve element 32 is simultaneously converted into a linear movement, wherein the speed can be reduced by the thread pitch on the spindle at the same time.
  • FIGS. 7 and 8 show a second embodiment of the invention, which differs from the first embodiment in that the valve means only provides a mixing function.
  • the pump housing 12 ' only three ports, namely the pressure port 22 and two terminals acting as inputs 24' and 26 '.
  • the pressure port 22 also branches off from pressure chamber 20, which is in the sectional plane according to Fig. 8 but not visible.
  • a valve element 32 ' is provided, which is hollow and is closed at its pressure chamber 20 side facing by a lid 36', wherein the lid 36 'again serves as an attack surface for the flow and the pressure in the pressure chamber 20.
  • the opposite axial end of the valve member 32 is open and forms in the in Fig.
  • a spindle 72 Inside the valve element, a spindle 72 is arranged, which engages in a threaded hole 74 at the bottom of the pump housing 12 '.
  • the spindle 72 is surrounded by a bellows 76 having the same function as the bellows 58 and 60.
  • an annular groove 78 is formed, which opens via an opening 80 in the interior of the valve element 32'.
  • the valve shown acts as a mixing valve. In the in Fig. 8 shown switching position covers the peripheral wall of the valve element 32 'the opening to the terminal 24' largely. If the rotation of the valve element 32 with the spindle 72 in the threaded hole 74 moves the valve element 32 'even further towards the impeller 14, the circumferential wall of the valve element 32' would completely cover the opening to the port 74 'so that it is closed and a flow path only the connection 26 'would be in the interior of the valve element 32 and from there via the suction port 38 in the suction port 40 would be given in.
  • valve element 32 ' when the valve element 32 'is moved by rotation to the bottom of the pump housing 12', the peripheral edge of the valve housing 32 'abuts the bottom of the pump housing 12' so that the flow path from the port 26 'is closed while the circumferential groove 78 closes the opening the port 74 'completely covers and the flow path from the port 74' into the interior of the valve element 32 'and from there through the suction port 38 to the suction port 40 completely releases. In intermediate positions are different mixing ratios possible.
  • the drive and the displacement of the valve element 32 is carried out as described with reference to the first embodiment.
  • a valve element is provided, which is rotationally moved between different switching positions.
  • the centrifugal pump assembly according to the third embodiment has a drive motor, which is arranged in a motor housing 2 and in its structure corresponds to the description according to the first two embodiments, so reference is made to this description at this point.
  • the impeller 14 is rotatably connected to the rotor shaft 8 and the impeller surrounding the pressure chamber 20 opens into a pressure port 22.
  • a valve element 32 is provided, which is also drum-shaped with a cup-shaped lower part 82 and this on a
  • the cover 85 has centrally the suction opening 38, which is in engagement with the suction mouth 40 by an axially projecting collar of the suction opening 38 engages in this embodiment in the interior of the suction mouth 40th Die Saugö réelle 38 surrounding annular surface of the lid 84 forms an attack or pressure surface on which the pressure in the pressure chamber 20 can act.
  • a drive shaft 86 Central through the valve element 32 'and the lower part 32 therethrough, extends a drive shaft 86, which carries a coupling part 88 at its axial end facing the impeller 14. This meshes with a corresponding coupling part 90 on the axial end face of the rotor shaft 8.
  • the two coupling parts 88 and 90 are designed so that they act only in one direction of rotation, that is, the coupling part 90 preferably has a sawtooth in the circumferential direction, which the Clutch part 88 entrains in a rotational direction.
  • the drive shaft 86 is rotatably mounted in a blind hole 92 in the bottom of the pump housing 12 'about the axis of rotation X, about which the rotor shaft 8 is rotatable. Axially, the drive shaft 86 is acted upon in the blind hole 92 by a spring force of a compression spring 94.
  • the compression spring 94 pushes the drive shaft 86 with the coupling part 88 into engagement with the coupling part 90 at the axial end of the rotor shaft 8.
  • the drive shaft 86 can move axially.
  • the lower part 82 of the valve element 32 "is axially fixed on, but rotatable about, the drive shaft 86.
  • the valve element 32" is coupled to the drive shaft 86 via a planetary gear 96.
  • the planetary gear 96 has a planetary gear 98, which is also rotatably mounted in the bottom of the pump housing 12 ', wherein it meshes with a toothing on the outer circumference of the drive shaft 86 so that it is driven in rotation by the drive shaft 86.
  • the axis of rotation of the planetary gear 98 extends parallel to the axis of rotation of the drive shaft 86 and thus the aligned axis of rotation X of the rotor shaft 8.
  • the valve element 32 "and the lower part 82 has at its bottom a recess or recess 100, which by an invagination in the Inner of the valve element 32 'is formed and has on its inner periphery a toothing, which meshes with the planetary gear 98th
  • This planetary gear 96 forms a reduction gear, which ensures that upon rotation of the rotor shaft 8, the valve element 32 "at a lower speed about the rotation axis X. rotates. This allows a more accurate adjustment.
  • the valve element 32 is also axially movable together with the drive shaft 86 to a certain extent along the longitudinal axis X. Such a movement can take place in the manner described above via the coupling parts 88, 90, but also by the pressure in the pressure chamber 20, which acts on the cover 84.
  • the entire valve element 32 ' is displaced towards the bottom 94 of the pump housing 12 "against the spring 94 so that the coupling parts 88, 90 are disengaged
  • the coupling formed by the coupling parts 88, 90 thus releases not only rotational directionally dependent but also pressure-dependent , ie, depending on the pressure in the pressure chamber 20.
  • the pump housing 12 "has two suction ports 24" and 26 '', which respectively open into a connection opening 102 and 104 in the bottom of the pump housing 2 '.
  • the lower part 82 of the valve element 32 “has an arcuate switching opening 106 at its bottom in the peripheral area of the planetary gear 96. Depending on the angle of rotation of the valve element 32 'about the axis of rotation X, the switching opening 106 covers one or both of the connection openings 102, 104.
  • a mixing ratio of the liquid flows supplied through the ports 24 "and 26" can be changed, and then through the interior of the valve element 32 ", the flow flows through the suction port 38 into the impeller 14.
  • the rotation of the valve element 32" is preferably in a first rotational direction of the drive motor, so that no turning back and forth takes place, but always a turn must be performed to move back.
  • the pump housing 12, 12 ', 12 forms a combined pump and valve housing which accommodates both the valve element 32, 32', 32" and the impeller 14.
  • the pump housing In particular, it would be possible to form a separate pump housing and a separate valve housing, wherein the pump housing would accommodate only the impeller 14 and the valve housing the valve element 32, 32 ', 32 ", wherein a Such pump housing could then be connected to such a valve housing in a suitable manner.

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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)
EP17160835.9A 2017-03-14 2017-03-14 Groupe motopompe Withdrawn EP3376036A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17160835.9A EP3376036A1 (fr) 2017-03-14 2017-03-14 Groupe motopompe
PCT/EP2018/056213 WO2018167047A1 (fr) 2017-03-14 2018-03-13 Ensemble pompe centrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17160835.9A EP3376036A1 (fr) 2017-03-14 2017-03-14 Groupe motopompe

Publications (1)

Publication Number Publication Date
EP3376036A1 true EP3376036A1 (fr) 2018-09-19

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EP (1) EP3376036A1 (fr)
WO (1) WO2018167047A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110129929A (zh) * 2019-05-29 2019-08-16 合肥经新纺织科技有限公司 一种单锭可控集聚纺纱装置和集聚方法
WO2019175135A1 (fr) * 2018-03-13 2019-09-19 Grundfos Holding A/S Unité de pompe centrifuge et procédé de déplacement d'un élément de soupape dans une telle unité de pompe centrifuge
WO2023166180A1 (fr) * 2022-03-04 2023-09-07 Vitesco Technologies GmbH Unité de pompe à clapet
WO2023166127A1 (fr) * 2022-03-04 2023-09-07 Vitesco Technologies GmbH Unité de pompe à soupape
WO2023217769A1 (fr) * 2022-05-12 2023-11-16 Woco Industrietechnik Gmbh Soupape de régulation et réseau de conduites

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019202975A1 (de) * 2019-03-05 2020-09-10 Hanon Systems Efp Deutschland Gmbh Elektrisch angetriebene Fluidmaschine

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Publication number Priority date Publication date Assignee Title
CH463896A (de) * 1963-09-21 1968-10-15 Louis Dipl Ing Siber Misch- und Temperaturregelvorrichtung in einem Gehäuse mit mehreren Anschluss-Stutzen für Warmwasserheizungs- und -bereitungsanlagen
DE1958277B1 (de) 1969-11-20 1971-02-25 Karl Schichl Umwaelzpumpe fuer warmwasser heizungsanlagen mit einem im pumpengehaeuse angeordneten vierwegemischerventil
DE10207653C1 (de) * 2002-02-22 2003-09-25 Gpm Geraete Und Pumpenbau Gmbh Elektrische Kühlmittelpumpe mit integriertem Ventil, sowie Verfahren zu dessen Steuerung
US20160258340A1 (en) * 2013-11-16 2016-09-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg Electromotive coolant pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463896A (de) * 1963-09-21 1968-10-15 Louis Dipl Ing Siber Misch- und Temperaturregelvorrichtung in einem Gehäuse mit mehreren Anschluss-Stutzen für Warmwasserheizungs- und -bereitungsanlagen
DE1958277B1 (de) 1969-11-20 1971-02-25 Karl Schichl Umwaelzpumpe fuer warmwasser heizungsanlagen mit einem im pumpengehaeuse angeordneten vierwegemischerventil
DE10207653C1 (de) * 2002-02-22 2003-09-25 Gpm Geraete Und Pumpenbau Gmbh Elektrische Kühlmittelpumpe mit integriertem Ventil, sowie Verfahren zu dessen Steuerung
US20160258340A1 (en) * 2013-11-16 2016-09-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg Electromotive coolant pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019175135A1 (fr) * 2018-03-13 2019-09-19 Grundfos Holding A/S Unité de pompe centrifuge et procédé de déplacement d'un élément de soupape dans une telle unité de pompe centrifuge
US11680571B2 (en) 2018-03-13 2023-06-20 Grundfos Holding A/S Centrifugal pump unit and method for moving a valve element in a pump unit
CN110129929A (zh) * 2019-05-29 2019-08-16 合肥经新纺织科技有限公司 一种单锭可控集聚纺纱装置和集聚方法
WO2023166180A1 (fr) * 2022-03-04 2023-09-07 Vitesco Technologies GmbH Unité de pompe à clapet
WO2023166127A1 (fr) * 2022-03-04 2023-09-07 Vitesco Technologies GmbH Unité de pompe à soupape
WO2023217769A1 (fr) * 2022-05-12 2023-11-16 Woco Industrietechnik Gmbh Soupape de régulation et réseau de conduites

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