EP3019751B1 - Pompe de refroidissement réglable pour moteur à combustion interne - Google Patents

Pompe de refroidissement réglable pour moteur à combustion interne Download PDF

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Publication number
EP3019751B1
EP3019751B1 EP14738622.1A EP14738622A EP3019751B1 EP 3019751 B1 EP3019751 B1 EP 3019751B1 EP 14738622 A EP14738622 A EP 14738622A EP 3019751 B1 EP3019751 B1 EP 3019751B1
Authority
EP
European Patent Office
Prior art keywords
pump
obturator
rotor
cartridge
entry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14738622.1A
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German (de)
English (en)
Other versions
EP3019751A1 (fr
Inventor
Pietro Piccini
Marco MILAZZO
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.)
Industrie Saleri Italo SpA
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Industrie Saleri Italo SpA
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Application filed by Industrie Saleri Italo SpA filed Critical Industrie Saleri Italo SpA
Publication of EP3019751A1 publication Critical patent/EP3019751A1/fr
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Publication of EP3019751B1 publication Critical patent/EP3019751B1/fr
Active 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
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
    • 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
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes

Definitions

  • the present invention relates to an adjustable cooling pump for a cooling circuit of an internal combustion engine and the cooling circuit comprising it.
  • the purpose of the present invention is thus to provide an adjustable pump which resolves the problems of the prior art.
  • reference numeral 1 globally denotes an adjustable cooling pump according to a preferred embodiment variant of the invention.
  • the adjustable cooling pump 1 is suitable to place in circulation a predefined quantity of coolant liquid in a cooling circuit of an internal combustion engine, for example of a motor vehicle or motorcycle.
  • the adjustable cooling pump 1 which the present invention relates to is suitable to regulate the transit of coolant liquid to the engine and in particular is suitable to move a predetermined quantity of liquid according to need; in other words, the cooling pump 1 depending on the temperature of the coolant liquid and the phase of the motor (for example, if this is in the starting phase, or if it is already fully operational) permits the adjustment of the quantity of coolant liquid in circulation.
  • the pump 1 comprises a pump body 2 comprising upstream at least one entry channel 21, 21' and downstream an exit channel 22; from the entry channel 21, 21' a predefined quantity of fluid enters the pump body 2 to then exit from the exit channel 22.
  • the pump 1 further comprises a rotor 3 placed in a rotor chamber 20 made in the pump body 2 between said channels, suitable for moving said coolant liquid through the exit channel 22.
  • the rotor 3 is of the radial type, the entry channel 21, 21' reaches the front of the radial rotor 3, while the output channel 22 is positioned circumferentially tangentially thereto.
  • the cooling circuit also comprises a differentiated cooling circuit, for example specifically for cooling different components other than the combustion engine cooled by the primary circuit; consequently between the entry channels 21 a by-pass channel 21' is also comprised, part of said differentiated cooling circuit.
  • a differentiated cooling circuit for example specifically for cooling different components other than the combustion engine cooled by the primary circuit; consequently between the entry channels 21 a by-pass channel 21' is also comprised, part of said differentiated cooling circuit.
  • a shaft 5 is connected to the rotor 3 suitable for placing said rotor 3 in rotation.
  • the rotor 3 is connected to one end of the shaft 5 while at the other end, the drive means are connected, for example a pulley 50 and a belt, as in the appended drawings, and/or an electric motor (not shown), or the electric motor with adjustable rotation (not shown) directly.
  • the pump 1 comprises regulation means 10 to regulate the flow towards the rotor 3 suitable to regulate the flow of coolant liquid to the rotor, and thus the circulation in the cooling circuit, depending on the temperature of the coolant liquid.
  • the regulation means 10 comprise an obturator cartridge 100 specifically for the aforesaid purpose.
  • said cartridge 100 is axially translatable and depending on its axial position is suitable to regulate the passage of coolant liquid, for example reducing or obstructing it.
  • the cartridge 100 is placed on the opposite side of the rotor 3, in other words on the opposite side to the shaft 5, at least partially in the entry channel 21.
  • the cartridge 100 is composed of a single integral piece partially housed in the rotor chamber 20 and partially housed in the entry channel 21.
  • the cartridge 100 has an obturator portion 110 interacting with the coolant liquid substantially housed in the rotor chamber 20 and a guide portion 120 substantially housed in the entry channel 21 and engaged therewith to guide the translation of the obturator cartridge 100.
  • the guide portion 120 in fact, is suitable to engage the inner rims 210 of the entry, channel 21 as a guide in translation.
  • the rotor chamber 20 has an entry mouth 20' for the fluidic communication with the entry channel 21; in other words the rotor chamber 20 has an entry mouth of the incoming liquid from the entry channel.
  • the obturator cartridge 100 is suitable to obstruct said entry mouth 20' or suitable, moved on command, to reduce the through cross-section.
  • the cartridge 100 is translatable between a fully closed position in which the obturator portion 110 substantially obstructs the entry mouth 20', a plurality of intermediate positions in which the obturator portion 110 is distanced from the entry mouth 20' and a fully open position corresponding to the maximum distance of the obturator portion 110 from the entry mouth 20'.
  • the obturator portion 110 has greater dimensions than the entry channel 21 and in particular the entry mouth 20', so that depending on its axial position the obturator 110 is suitable to obstruct the through cross-section of the entry channel 21 engaging the rims of the entry mouth 20'.
  • the guide portion 120 instead has substantially complementary dimensions to the entry channel 21 extending close to an inner surface thereof.
  • the obturator cartridge 100 extends in length.
  • the obturator cartridge 100 extends with an axial-symmetric extension, for example around a cartridge axis X-X.
  • the guide portion 120 has an annular extension.
  • the guide portion 120 is preferably joined to the obturator portion 110 by ribs 122 which extend along the cartridge axis X-X. Between two consecutive ribs 122, the obturator portion 110 and the guide portion 120 identify a through space 101 through which the coolant liquid is suitable to pass when the cartridge 100 is not in the fully closed position.
  • a plurality of through spaces 101 are present interspersed by the ribs 122.
  • said through space 101 overlooks the side surface of the entry channel 21 or is partially or completely in the rotor chamber 20.
  • the rotor 3 has a front cavity 30, central thereto, suitable for housing the obturator portion 110 of the cartridge 100.
  • the front cavity 30 is suitable to contain the obturator portion 110, partially when the cartridge 100 is placed in the intermediate positions, while it is suitable to contain it in its entirety when the cartridge 100 is instead placed in the open position.
  • the side rims of the front cavity 30 are also suitable to be engaged by the sides of the obturator portion 110 so as to act as an axial guide.
  • the obturator portion 110 is shaped so as to facilitate the flow of liquid to the rotor 3 towards the exit channel 22, in the intermediate and fully open configurations of the obturator cartridge 100.
  • the obturator portion 110 is suitable to act as a stopper, but also to act as a flow conveyor being suitable to direct the coolant liquid toward the rotor 3 and specifically towards the blades 35 of the rotor.
  • the obturator portion 110 comprises a diverter surface 115 which faces the entry mouth 20', suitable to direct the liquid to the rotor.
  • the diverter surface 115 is inclined to the imaginary cross-section surface of the entry channel 21 or the area delimited by the entry mouth 20' in such a way that the liquid flows over it and is directed toward the rotor 3.
  • the diverter surface 115 has an angle of inclination ⁇ equal to the angle of attachment ⁇ ' of the blades 35 of the rotor 3.
  • said diverter surface 115 is conical or a truncated-cone shape.
  • the regulation means 10 comprise detection means 200 sensitive to the temperature of the liquid and command means 300 operatively connected to said detection means and to the obturator cartridge 100 so as to move it depending on the temperature on the detection means 200.
  • the detection means 200 are suitable to have at least a portion thereof in contact with the coolant liquid to be influenced by the temperature thereof.
  • the positioning of the obturator cartridge 100 is controlled by means of the command means 300 in a preferred position among those which said cartridge 100 is suitable to assume, and thus permit the reduction or obstruction of the transit of coolant liquid towards the rotor 3.
  • the command means 300 comprise a command rod 310, movable in translation and attached to the obturator cartridge 100 in such a way that the movement of the rod 310 corresponds to a movement of the obturator cartridge 100.
  • said command rod 310 has one end connected to the cartridge 100 while the other end is operatively connected to the detection means 200.
  • said command rod 310 connected to the cartridge 100, extends along said cartridge axis X-X; preferably, the command rod 310 is suitable to be attached facing the diverter surface 115.
  • the detection means 200 comprise elastic return means 210, such as compression springs, coil springs or one or more cup springs, suitable to act on the command rod 310 to keep the command means 300 active, i.e. to keep the cartridge 100 in the closed position.
  • elastic return means 210 such as compression springs, coil springs or one or more cup springs, suitable to act on the command rod 310 to keep the command means 300 active, i.e. to keep the cartridge 100 in the closed position.
  • the detection means 200 are suitable to overcome the force of the elastic return means 210 moving the command rod 310.
  • the adjustment means 10 comprise a thermostat 500.
  • the thermostat is suitable to act as the detection means 200 so as to move the command rod 310 preferably connected to it.
  • the regulation means 10 are housed inside the pump body 2, preferably in the entry channel 21 and in the rotor chamber 20.
  • the obturator cartridge 100 has a portion housed in the entry channel 21 and another portion housed in the rotor chamber 20, while the other components, i.e., the detection means 200 (also in the embodiment comprising a thermostat) and the command means 300 are housed inside the entry channel 21 (see the figures showing the cross-section of the pump body by way of example).
  • the coolant liquid is suitable to act directly on said components.
  • the detection means 200 are placed in other positions of the pump body 2, or even in other positions of the cooling circuit.
  • the command means 300 have shapes and geometries different from those described above and are positioned differently in the pump body 2 or in generic forms in the cooling circuit; according to some embodiments, the detection 200 and command means 300 may be replaced by electrical or vacuum systems.
  • the present invention also relates to a cooling circuit of an internal combustion engine comprising a cooling pump 1 according to the above description.
  • the regulation of the flow of liquid does not affect the operation of the rotor, which proves entirely disconnected and independent therefrom.
  • a further advantageous aspect is moreover due to the fact that in the cooling pump which the present invention relates to, the leakage phenomena of the coolant liquid are minimised, which instead typically afflict the solutions of the prior art.
  • Another advantage lies in the fact that, thanks to the cooling pump according to the present invention, the energy dispersion of all the components is substantially reduced and minimised; this way the dispersion of pollutants, such as carbon dioxide, are controllable and are minimisable.
  • pollutants such as carbon dioxide
  • the operation of the rotor may be achieved in multiple ways, for example by means of a pulley, or with one or more electric motors, thus making it possible to control the rotation efficiently and thus realising further energy savings.
  • the pump which the present invention relates to has a more compact shape and limited overall dimensions.
  • a further advantageous aspect lies in the simplicity and economy of the pump according to the present invention.
  • obturator cartridge and in general the regulation means do not rotate together with the rotor and therefore do not increase its inertia and in general the inertia of the cooling pump.
  • the cartridge proves extremely durable thus improving the life span of the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (16)

  1. Pompe de refroidissement ajustable (1) pour un circuit de refroidissement d'un moteur à combustion interne, adaptée pour le déplacement d'une quantité prédéfinie de liquide réfrigérant, comprenant :
    - un corps de pompe (2) comprenant en amont au moins un canal d'entrée (21, 21') et en aval un canal de sortie (22) ;
    - un rotor (3) placé dans une chambre de rotor (20) réalisée dans le corps de pompe (2) entre lesdits canaux, adapté pour déplacer ledit liquide réfrigérant vers le canal de sortie (22);
    - un arbre (5) relié au rotor (3) adapté pour le déplacer en rotation;
    - des moyens de régulation (10) adaptés pour réguler le flux de liquide au rotor (3) dépendant de sa température, comprenant une cartouche d'obturateur (100), mobile en translation, positionnée sur le côté en regard de l'arbre (5) comprenant une portion d'obturateur (110) interagissant avec le liquide sensiblement logé dans la chambre de rotor (20) et une portion de guidage (120) logée sensiblement dans le canal d'entrée (21) et engagée avec celui-ci pour guider la translation de la cartouche d'obturateur (100).
  2. Pompe (1) selon la revendication 1, dans laquelle la cartouche d'obturateur (100) est réalisée en une pièce.
  3. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle la chambre de rotor (20) présente une bouche d'entrée (20') pour la communication fluidique avec le canal d'entrée (21), dans laquelle la cartouche d'obturateur (100) est mobile en translation entre une position de fermeture totale, dans laquelle la portion d'obturateur (110) obstrue sensiblement la bouche d'entrée (20'), une pluralité de positions intermédiaires dans lesquelles la portion d'obturateur (110) est espacée de la bouche d'entrée (20') et une position ouverte correspondant à la distance maximum de la portion d'obturateur (110) par rapport à la bouche d'entrée (20').
  4. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle la portion d'obturateur (110) présente des dimensions plus grandes que le canal d'entrée (21) et en particulier que la bouche d'entrée (20') alors que la portion de guidage (120) présente des dimensions sensiblement complémentaires au canal d'entrée (21) s'étendant près d'une surface intérieure de celui-ci.
  5. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle la cartouche d'obturateur (100) s'étend en longueur, de préférence avec une extension à symétrie axiale.
  6. Pompe (1) selon les revendications 4 et 5, dans laquelle la partie de guidage (120) présente une extension annulaire.
  7. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle le rotor (3) présente une cavité avant (30), centrale à celui-ci, adaptée pour loger la portion d'obturateur (110).
  8. Pompe (1) selon la revendication 7, dans laquelle la portion d'obturateur (110) est formée de sorte à faciliter le flux de liquide du rotor (3) vers le canal de sortie (22) dans les configurations d'ouverture intermédiaire et totale de la cartouche d'obturateur (100).
  9. Pompe (1) selon la revendication 8, dans laquelle la portion d'obturateur (110) comprend une surface de déviation (115) tournée vers la bouche d'entrée (20'), adaptée pour diriger le liquide au rotor, dans laquelle ladite surface de déviation (115) présente le même angle d'inclinaison que l'angle d'attache des ailettes (35) du rotor (3).
  10. Pompe (1) selon la revendication 9, dans laquelle la surface de déviation (115) est conique.
  11. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle les moyens de régulation (10) comprennent un moyen de détection (200) sensible à la température du liquide et un moyen de commande (300) relié en fonctionnement auxdits moyens de détection et à la cartouche d'obturateur (100) de sorte à la déplacer selon la température sur les moyens de détection (200).
  12. Pompe (1) selon la revendication 11, dans laquelle les moyens de commande (300) comprennent une tige de commande (310) mobile en translation et attachée à la cartouche d'obturateur (100) de telle manière que le mouvement de la tige (310) corresponde à un mouvement de la cartouche d'obturateur (100).
  13. Pompe (1) selon les revendications 11 et 12, dans laquelle les moyens de détection (200) comprennent des moyens de rappel élastique (210) adaptés pour agir sur la tige de commande (310) pour maintenir les moyens de commande (300) actifs, à savoir pour maintenir la cartouche (100) dans la position fermée.
  14. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle les moyens de régulation (10) comprennent un thermostat (500).
  15. Pompe (1) selon l'une quelconque des revendications précédentes, dans laquelle les moyens de régulation (10) sont logés dans le corps de pompe (2), de préférence dans le canal d'entrée (21) et dans la chambre de rotor (20).
  16. Circuit de refroidissement d'un moteur à combustion interne comprenant une pompe de refroidissement (1) selon l'une quelconque des revendications précédentes.
EP14738622.1A 2013-07-09 2014-06-12 Pompe de refroidissement réglable pour moteur à combustion interne Active EP3019751B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000100A ITBS20130100A1 (it) 2013-07-09 2013-07-09 Pompa di raffreddamento regolabile per motore a combustione interna
PCT/IB2014/062175 WO2015004548A1 (fr) 2013-07-09 2014-06-12 Pompe de refroidissement réglable pour moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP3019751A1 EP3019751A1 (fr) 2016-05-18
EP3019751B1 true EP3019751B1 (fr) 2017-07-19

Family

ID=49118610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14738622.1A Active EP3019751B1 (fr) 2013-07-09 2014-06-12 Pompe de refroidissement réglable pour moteur à combustion interne

Country Status (4)

Country Link
EP (1) EP3019751B1 (fr)
CN (1) CN105408633B (fr)
IT (1) ITBS20130100A1 (fr)
WO (1) WO2015004548A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB201571309U1 (it) 2015-09-24 2017-03-24 Ind Saleri Italo Spa Gruppo pompa ad azionamento elettrico ed azionamento meccanico
IT201700010400A1 (it) 2017-01-31 2018-07-31 Ind Saleri Italo Spa Gruppo pompa ad azionamento elettrico ed azionamento meccanico
DE102017203928A1 (de) * 2017-03-09 2018-09-13 Mahle International Gmbh Axialkolbenmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB983831A (en) * 1960-06-15 1965-02-17 Dowty Fuel Syst Ltd Improved liquid pressure supply system
GB974958A (en) * 1962-09-03 1964-11-11 Dowty Fuel Syst Ltd Fluid metering device
DK139989B (da) * 1973-07-03 1979-05-28 Smedegaard As Centrifugalpumpe med reguleringsmekanisme.
US3867060A (en) * 1973-09-27 1975-02-18 Gen Electric Shroud assembly
DE10247424A1 (de) * 2002-10-11 2004-04-22 Daimlerchrysler Ag Verstellbares Pumpenlaufrad
FR2869370B1 (fr) * 2004-04-23 2008-08-22 Mark Iv Systemes Moteurs Sa Dispositif de pompe a debit variable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN105408633B (zh) 2017-09-22
WO2015004548A1 (fr) 2015-01-15
EP3019751A1 (fr) 2016-05-18
CN105408633A (zh) 2016-03-16
ITBS20130100A1 (it) 2015-01-10

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