EP1471260B1 - Pompe de circulation avec dispositif de soupape - Google Patents

Pompe de circulation avec dispositif de soupape Download PDF

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Publication number
EP1471260B1
EP1471260B1 EP20040003128 EP04003128A EP1471260B1 EP 1471260 B1 EP1471260 B1 EP 1471260B1 EP 20040003128 EP20040003128 EP 20040003128 EP 04003128 A EP04003128 A EP 04003128A EP 1471260 B1 EP1471260 B1 EP 1471260B1
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EP
European Patent Office
Prior art keywords
valve
circulation pump
control
pump according
valve arrangement
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.)
Expired - Lifetime
Application number
EP20040003128
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German (de)
English (en)
Other versions
EP1471260A2 (fr
EP1471260A3 (fr
Inventor
Thomas Materne
Holger Sommer
Berd-Thorsten Stock
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.)
Wilo SE
Original Assignee
Wilo AG
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
Priority claimed from DE10331973A external-priority patent/DE10331973A1/de
Application filed by Wilo AG filed Critical Wilo AG
Publication of EP1471260A2 publication Critical patent/EP1471260A2/fr
Publication of EP1471260A3 publication Critical patent/EP1471260A3/fr
Application granted granted Critical
Publication of EP1471260B1 publication Critical patent/EP1471260B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—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

Definitions

  • the invention relates to a circulating pump, in particular for heating systems, with a, in particular temperature-dependent, operable valve means for varying the cross section of a suction port, in particular to close this, wherein the valve means and a control / regulating means are provided for actuating the valve means within the pump housing.
  • One in the DE-OS-2134649 disclosed circulating pump has an arranged outside the pump housing actuator to make by means of a frictional connection between the actuator and the actuator of the valve means a flow adjustment that the effective cross section, the pump impeller associated with the intake port is variable. It is particularly disadvantageous that the overall arrangement of pump and actuator reaches a very large design and, moreover, special sealing measures are to be taken in order to move the inner valve actuator in front of the suction opening via the externally arranged actuator.
  • Circulating pumps with a control / regulating device within the pump housing are for example from the publications GB 24516A . US-A-4 643 635 . DE 10 56 877 and EP-A-0 148 583 known. However, these structures disclosed herein are bulky and expensive.
  • the object of the invention is to provide a structurally simplified circulation pump, which has a valve device for changing the cross section of a suction opening, in particular to completely close the suction opening.
  • This object is achieved in that extends an actuating element for moving the valve actuator of the control / regulating device by a hollow motor shaft.
  • valve device and a control / regulating device within one and the same pump housing problems with respect to the tightness are avoided because no transitions between the control / regulating device and the valve device are to be realized by the housing. In this respect, additional sealing measures are avoided by this construction.
  • At least one temperature sensor or temperature sensitive element may also be provided within the pump when a valve setting e.g. should take place depending on the fluid and / or the engine temperature.
  • the construction according to the invention is very compact, since the control / regulating device can still be realized in the engine compartment of the engine of a circulating pump.
  • An actuation of the valve actuator of the valve device is achieved in this design in that an actuating element for movement of the valve actuator is provided, which extends from the control / regulating device by a hollow motor shaft.
  • the actuating element by means of the control / regulating device temperature-dependent operated, that is, moved, wherein the actuation by the hollow motor shaft passes through into a movement of the valve actuator.
  • the effective intake opening can be reduced or enlarged in its cross-section, or closed or opened.
  • valve device and the control / regulating device are arranged on opposite sides of the drive motor in the circulating pump.
  • the valve device can be arranged directly in front of the pump impeller, whereas the control / regulating device can be arranged on the opposite side of the pump impeller of the drive motor.
  • valve actuator of the valve device is movable coaxially with the motor shaft.
  • the valve actuator which is designed, for example, as a valve disk, can be moved in the direction of the longitudinal axis of the motor shaft toward the suction mouth of the impeller and / or an intake opening of the impeller or a valve seat arranged in front of it or can be moved away therefrom in order to vary the effective cross-section of the suction mouth / the suction opening, optionally to close or to open completely.
  • the valve actuator within the suction chamber which is upstream of the impeller of a circulating pump, is arranged so that there is no increase in the design due to the already existing suction space.
  • thermoelectric device For this purpose it may e.g. be provided in a first alternative to the control / regulation of the valve device that temperatures are detected at any point of the pump or in the circulating fluid and the control / regulating device these temperatures are supplied as a measured variable.
  • the temperature within the housing, in particular within the engine compartment is detected, since then additional measures for transmitting the measured variables to the control / regulating device can be omitted, in particular if these measured variables are detected directly within the control / regulating device , In this respect, it is possible in a simple manner to regulate the fluid flow rate or to open or shut off the fluid as a function of the fluid temperature and particularly simply as a function of the engine temperature.
  • a preferred construction is when the actuator is formed as a rod, e.g. at one end carries the valve actuator or whose end is provided for actuating the valve means, in particular of the valve actuator.
  • the valve actuator in particular a valve disk, relative to the suction mouth of the impeller or a suction port arranged in front are positioned.
  • the linear displacement of the actuating element designed as a rod in the direction of the motor shaft can be achieved by any mechanism within the control / regulating device.
  • a mechanical and / or electrical actuator is provided within the control / regulating device in order to actuate the rod.
  • the control / regulating device is designed as a fluid-filled expansion vessel.
  • a fluid-filled expansion vessel is characterized in that it contains a fluid, for example a gas, a wax or a liquid, which has a high expansion coefficient, so that at different temperatures greatly different volumes within the Set expansion vessel, causing a movement of a pressure compensation mechanism whose movement is transmitted to the example formed as a rod actuator.
  • a conventional mechanical training can be realized, as is known from thermostatic valves ago to move the adjusting pin.
  • a further particularly small-sized particularly short design of a circulating pump according to the invention is obtained when the control / regulating device, stator and rotor of the drive motor are arranged coaxially with each other, wherein the order of interlocking arrangement is irrelevant.
  • control device in particular the said expansion vessel, can be arranged coaxially inside the stator, and furthermore the rotor can be arranged around the stator.
  • a regulation of the flow rate or the shut-off of the conveying fluid e.g. at falling temperatures or temperatures below an operating temperature in the engine compartment is particularly useful when a stationary circulating pump circulation through a heat consumer, which is supplied by the respective circulating pump with fluid to be prevented. As a result, energy can be saved to a considerable extent.
  • An essential application of such a temperature-controlled circulating pump is the use as a decentralized heating pump, where each radiator is assigned in each case a circulating pump, which replaces a thermostat valve usually arranged there.
  • it makes sense after a shutdown of the motor of the circulating pump a possible
  • an opening, such as the suction port in the fluid path of the pump is closed.
  • this is advantageously achieved by reducing the temperature in the engine compartment below the operating temperature, e.g. due to the cooling of the fluid in the expansion vessel, a displacement of the rod formed as an actuating element is automatically carried out in the direction that the valve actuator completely closes the suction port of the circulation pump.
  • the operation of the motor will produce an opening, e.g. the suction opening in the fluid path of the pump opened.
  • the motor of the circulating pump is energized and thereby generates a waste heat, which leads to an expansion of the fluid in the expansion vessel, whereby automatically the valve actuator is pushed out of the valve seat and releases the suction port.
  • This squeezing out is preferably carried out against a force directed into the valve seat, so that at falling temperatures and contracting expansion fluid, the valve actuator is automatically pressed into the valve seat.
  • a heat generator is arranged with the targeted heating of the fluid in the expansion vessel can take place.
  • a heat generator may be designed as an energizable coil or as a resistor to achieve an artificially initiated heating of the fluid, whereby the valve actuator from the valve seat is pushed out.
  • the valve device can not be actuated in this way not only for temperature-dependent control / regulation.
  • valve actuator of the valve device may also be provided in a second alternative to the control / regulation to selectively adjust the valve actuator by the control / regulating device , Especially only in two end positions, in which the valve device is either open or closed.
  • the valve device comprises a two-way latching mechanism, in particular the valve actuator is connected to a two-way latching mechanism.
  • a two-way latching mechanism is understood to mean a mechanism which alternately passes through two different working paths with an always identical type of actuating movement, and thus alternately transfers the associated valve actuator into one or the other end position, ie the open or closed position.
  • valve actuator upon actuation of the above-described actuating element, the valve actuator is transferred to the open position and remains there, in particular by latching. It requires no further actuation of the actuating element in order to hold the valve actuator in this position, since the catch carries this care.
  • valve actuator In a next identical manner of operation of the actuator (e.g., by heating the expansion vessel), the valve actuator is released from the first detent position by the two-way detent mechanism and transferred to a second detent position corresponding to the closed position. Also in this position, it requires no further operation to hold the valve. In a renewed operation, the valve device is again transferred to the open position and so on.
  • valve means may be transferred from one position of the valve actuator to another.
  • valve actuator In the case of the two-way detent mechanism mentioned above, provision may also be made for the valve actuator to be acted upon by a force permanently in a direction which is e.g. is generated by a spring. As a result, it is reliably achieved that the valve actuator is reliably transferred upon actuation of the actuating element in one of the two possible end positions.
  • the two-way latching mechanism can be realized in a known manner, by Kippsprungwerke, stepping, running on inclined surfaces cams running in the cam grooves cams, gears, etc.
  • FIG. 1 shows a typical circulating pump 1, which in the present case is designed as a gap tube centrifugal pump.
  • the centrifugal pump has an integral or as shown here a two-part housing 2, within which a drive motor with a typical arrangement of stator 3 and rotor 4 is arranged.
  • the rotor 4 By energizing the stator 3, the rotor 4 is set in rotation, which equally drives the impeller 5 with the rotor 4 via a hollow shaft 7 mounted in the two bearings 6.
  • the impeller 5 has a suction mouth 8, which is directly opposite a suction opening 9 in the inner housing portion of the circulation pump.
  • a suction mouth 8 which is directly opposite a suction opening 9 in the inner housing portion of the circulation pump.
  • the circulating pump shown has both a valve device 13 and a control / regulating device 14 within the housing 2.
  • valve device 13 essentially comprises a plate-shaped valve actuator 15 which is adapted in its shape to a valve seat 16 adjoining the intake opening 9.
  • valve disk 5 is disposed at one end of an actuating rod 17 extending from the suction chamber 10 through the suction port 9, the impeller 10 and the Hollow shaft 7 of the drive motor extends into the control / regulating device 14 and can be moved by means of this in the axial direction.
  • the displacement of the valve disk 15 takes place with increasing temperature in the engine compartment against a force which is applied in the present case by a spring 18 on the valve disk 15 in order to press this directed into the valve seat 16.
  • the spring 18 is mounted both on the valve plate 15 and on a housing-side region of the inner wall of the suction chamber 10.
  • the control / regulating device 14 in the form of an expansion vessel 19 is formed in the present case, which is completely realized in the interior of the pump housing in the engine compartment.
  • a fluid 20 for example a gas or a liquid, which has a high expansion coefficient.
  • FIG. 2 shows a particularly small circulating pump 1 according to the invention.
  • a basic element of this circulating pump 1 forms the control / regulating unit realized as an expansion vessel 19.
  • the left-side end face 19a of the expansion vessel 19 merges into a hollow shaft 7, which can preferably also be formed in one piece with the expansion vessel 19 in order to avoid seals.
  • a housing element 2 can be placed during assembly of the circulation pump 1, which has a split pot 22 in its inner region, the pot bottom rests against the left-side end face 19a of the expansion vessel 19 and the pot wall surrounds the expansion vessel 19 at a distance.
  • This distance is selected such that the stator 3 of the motor of the circulating pump 1 can be arranged around the expansion vessel 19.
  • This stator can be inserted with reference to the figure 2 during assembly from the right into the containment shell.
  • the expansion vessel 19 is arranged coaxially inside the stator 3 as a special embodiment of the control / regulating device.
  • a valve plate 15 Extending through the hollow shaft 7, starting from the expansion vessel 19, is an actuating rod 17 at the other end of which a valve plate 15 is fastened.
  • the valve plate 15 is pulled by a spring 18, which is designed in this embodiment as a tension spring 18 in the valve seat 16 and pushed out at an expansion of the fluid in the expansion vessel 19 via the then compressed bellows 21 and the actuating rod 17 from the valve seat 16 against the spring force ,
  • the fluid path of the pumped fluid can be formed by an inner pump portion 23, which can be inserted into the housing 2 on the left side, after the impeller 5 has been positioned on the hollow shaft 7.
  • an inner pump portion 23 By the shaping of this inner region 23, the suction and pressure chambers and the valve seat 16 are formed.
  • FIG. 3 shows an embodiment of a circulating pump according to the invention with a two-way latching mechanism 25.
  • valve disk 15 of a valve device can be actuated via an actuating element 17 by means of a control device 20, which can also be designed here as an expansion vessel, i. be moved.
  • the actuator 17 is moved by driving the control unit to the left or right.
  • the left end of the actuating element 17 in this case does not directly support the valve disk 15 but is connected via an intermediate two-way latching mechanism 25 with this.
  • this latching mechanism comprises a cylindrical projection 26 which is realized on the valve disk is and whose front side has a toothing 27 with successively different deep teeth, which are formed as inclined running surfaces. On these running surfaces run cam 28 which are arranged on the actuating element and project radially from this.
  • a cam 28 is pressed against an inclined running surface 27 and thereby the actuator 17 is rotated, as it is known from a ballpoint pen mechanism.
  • the cam lingers in the lower tip of a toothing and presses the valve plate out of its seat against the force of the spring 18.
  • the valve actuator 15 is alternately reciprocated between the open and closed positions.
  • the two-way detent can be performed in any manner.
  • the illustrated embodiment is not limiting. It is particularly advantageous in all constructions shown that there is no need for special sealing measures, since the entire valve device and also the control / control device are arranged completely within the housing of the circulating pump, in which case in particular the expansion vessel can adjoin the split pot bottom of the engine.
  • expansion vessel and containment shell or canned and / or hollow shaft are integrally formed in order to avoid additional seals.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (10)

  1. Pompe de recirculation, notamment pour des installations de chauffage, dotée d'un dispositif à soupapes actionnable en particulier en fonction de la température, destiné à modifier la section d'un orifice d'aspiration, plus particulièrement pour le refermer, le dispositif à soupapes (13) et un dispositif de commande/réglage (14) destiné à actionner le dispositif à soupapes (13) étant prévus au sein du carter de pompe (2), caractérisée en ce qu'un élément d'actionnement (17) destiné à déplacer l'organe de réglage de soupape (15) du dispositif de commande/réglage (14) s'étend au travers d'un arbre du moteur (7) conçu de manière creuse.
  2. Pompe de recirculation selon la revendication 1, caractérisée en ce que le dispositif à soupapes (13) et le dispositif de commande/réglage (14) sont disposés sur les côtés opposés du moteur d'entraînement (3, 4).
  3. Pompe de recirculation selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un organe de réglage de soupape (15) du dispositif à soupapes (13) peut être déplacé de manière coaxiale par rapport à l'arbre du moteur (7).
  4. Pompe de recirculation selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un élément d'actionnement (17) est conçu comme une barre qui porte sur l'une de ses extrémités l'organe de réglage de soupape (15).
  5. Pompe de recirculation selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de commande/réglage (14) est conçu comme un vase d'expansion (19) rempli de fluide.
  6. Pompe de recirculation selon la revendication (5), caractérisée en ce que dans le vase d'expansion (19) est disposé un générateur de chaleur, en particulier une bobine pouvant être activée et/ou une résistance.
  7. Pompe de recirculation selon l'une quelconque des revendications précédentes, caractérisée en ce qu'en cas de chute de la température dans le compartiment moteur, en particulier lorsque le moteur d'entraînement (3, 4) est éteint, l'orifice d'aspiration (9) peut être fermé automatiquement au moyen du dispositif à soupapes (13).
  8. Pompe de recirculation selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de commande/réglage (14) est disposé de manière coaxiale au sein du stator (3) de l'arbre d'entraînement.
  9. Pompe de recirculation selon la revendication 8, caractérisée en ce que le stator (3) est disposé de manière coaxiale au sein du rotor (4).
  10. Pompe de recirculation selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend un mécanisme d'encliquetage à deux voies (25), au moyen duquel le dispositif à soupapes, notamment l'organe de réglage de soupape (15) peut être maintenu en alternance à la position ouverte ou fermée lors de/après l'actionnement de l'élément d'actionnement (17).
EP20040003128 2003-04-24 2004-02-12 Pompe de circulation avec dispositif de soupape Expired - Lifetime EP1471260B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10318701 2003-04-24
DE10318701 2003-04-24
DE10331973A DE10331973A1 (de) 2003-04-24 2003-07-14 Umwälzpumpe mit Ventileinrichtung
DE10331973 2003-07-14

Publications (3)

Publication Number Publication Date
EP1471260A2 EP1471260A2 (fr) 2004-10-27
EP1471260A3 EP1471260A3 (fr) 2005-09-14
EP1471260B1 true EP1471260B1 (fr) 2007-09-05

Family

ID=32963537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040003128 Expired - Lifetime EP1471260B1 (fr) 2003-04-24 2004-02-12 Pompe de circulation avec dispositif de soupape

Country Status (2)

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EP (1) EP1471260B1 (fr)
DE (1) DE502004004841D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015224448A1 (de) * 2015-12-07 2017-06-08 Mahle International Gmbh Kühlmittelpumpe für einen Motorkühlkreis

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191324516A (en) * 1913-10-29 1914-07-30 John Taylor Improvements in and relating to Centrifugal Pumps.
GB842354A (en) * 1956-08-07 1960-07-27 Dowty Fuel Syst Ltd Improvements in variable liquid supply systems
GB8334146D0 (en) * 1983-12-22 1984-02-01 Lucas Ind Plc Fuel pumps
US4643635A (en) * 1984-07-02 1987-02-17 Chandler Evans Inc. Vapor core centrifugal pump having main and low flow impellers

Also Published As

Publication number Publication date
DE502004004841D1 (de) 2007-10-18
EP1471260A2 (fr) 2004-10-27
EP1471260A3 (fr) 2005-09-14

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