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EP2599976A1 - Dispositif de transmission du mouvement vers les ventilateurs pour moteurs de refroidissement avec arrêt du ventilateur dans une condition de ralenti - Google Patents

Dispositif de transmission du mouvement vers les ventilateurs pour moteurs de refroidissement avec arrêt du ventilateur dans une condition de ralenti Download PDF

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Publication number
EP2599976A1
EP2599976A1 EP11191671.4A EP11191671A EP2599976A1 EP 2599976 A1 EP2599976 A1 EP 2599976A1 EP 11191671 A EP11191671 A EP 11191671A EP 2599976 A1 EP2599976 A1 EP 2599976A1
Authority
EP
European Patent Office
Prior art keywords
armature
fan
flange
generating means
clutch
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Withdrawn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
EP11191671.4A
Other languages
German (de)
English (en)
Inventor
Erminio Depoli
Piercarlo Boffelli
Fabio Natale
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.)
Baruffaldi SpA
Original Assignee
Baruffaldi SpA
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 Baruffaldi SpA filed Critical Baruffaldi SpA
Priority to EP11191671.4A priority Critical patent/EP2599976A1/fr
Publication of EP2599976A1 publication Critical patent/EP2599976A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
    • F01P7/081—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches
    • F01P7/082—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches using friction clutches
    • F01P7/084—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches using friction clutches actuated electromagnetically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/022—Units comprising pumps and their driving means comprising a yielding coupling, e.g. hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/026—Units comprising pumps and their driving means with a magnetic coupling

Definitions

  • the present invention relates to a device for transmitting the movement to a fan for cooling the coolant in a motor vehicle, able to keep the fan at a standstill in the idle position thereof.
  • said fan must be made to rotate only when a certain predefined temperature of the water has been reached, said temperature being detected by means of a thermostat which activates an electromagnetic clutch, closing of which causes the fan to start rotating.
  • said fan must be able to rotate:
  • couplings of the mixed type comprising electromagnetically controlled friction clutches and drive couplings which use the eddy currents generated by the rotation of a conducting part in the vicinity of permanent magnets.
  • the technical problem which is posed, therefore, is to provide a device for transmitting the rotational movement to a fan for cooling the coolant in motor vehicles, which is able to allow the fan to rotate at a number of revolutions which can be controlled and adjusted depending on the actual need for cooling of the engine and which also allows the fan to be kept at a standstill in its idle condition.
  • the device should have compact dimensions, that it should not require means for braking the fan which, although able to stop the fan, would nevertheless result in an increased power consumption, and that it should be able to be controlled by means of direct sensing of the coolant temperature.
  • the device for transmitting the movement to a fan 1 for cooling motor vehicles comprises:
  • the hollow sleeve 21 has, keyed thereon, a first bearing 11 seating a pulley 3 connected to the crankshaft of the vehicle by means of a belt 3a and forming the means for generating the movement of the device.
  • a first friction clutch 100 and a second eddy current or Foucault clutch 200 are arranged between the fan 1 and the pulley 3.
  • the friction clutch 100 comprises a first armature 110 provided with friction material 110a and connected by means of a resilient element 111 to a flange 101 axially connected to the pulley 3 with which it rotates integrally.
  • the resilient element 111 allows movements of the armature in the axial direction, but prevents relative rotation thereof with respect to the flange 101.
  • the flange 101 also has an associated bearing 102, the inner race of which, towards the axis of rotation, supports a flat member 201 made of magnetic material and carrying permanent magnets 202 arranged in a suitable radial position so as to be situated axially opposite a conducting disc 203 inserted in the flange 101; said magnets 202 and conducting disc 203 forming the linking elements of the said Foucault or eddy-current induction clutch 200.
  • Said disc 201 in turn has a second armature 120 which is concentric with the first armature and provided with respective friction material 120a and connected to the disc by means of a resilient element 121 which allows movements of the armature in the axial direction, but prevents the relative rotation thereof with respect to the said disc.
  • Said armatures 110 and 120 form the driving element of the clutch 100 comprising a first annular electromagnet 132 and a second annular electromagnet 133 which are fixed onto the sleeve 21 and electrically connected to a thermostat (not shown) for example for sensing the temperature of the cooling water via cables 132a.
  • the two electromagnets 132,133 are situated radially opposite the respective armature 110 and 120.
  • a rotor 140 with a suitable C-shaped cross-section for concentrically containing the two electromagnets 132,133 is arranged between the electromagnets 132,133 and the armatures 110,120; said rotor is mounted on a second bearing 15 keyed onto the fixed support 21.
  • the rotor 140 therefore forms the driven part of the device and carries the fan 1 which is made to rotate in the manner described below.
  • the transmission device which comprises: a driven rotor mounted on a fixed support via an associated bearing separate from the movement generating means (pulley) and a pair of driving armatures, one of which is directly connected to the movement generating means and the other one of which is connected to the latter via an associated bearing mounted on the driving flange, it is possible to neutralize the bearing driving effects due to the relative friction within them, therefore reducing the torque acting on the crankshaft and therefore the power consumption due to the free rotation of the fan in the idle condition, as occurs in the devices of the prior art.
  • Fig. 2 shows a variation of embodiment of the transmission device according to the invention which comprises in this case a permanent magnet 300 arranged opposite the second electromagnet 133; in this configuration the permanent magnet 300 constantly recalls the second armature 120 which is released only upon excitation of the electromagnet which eliminates the magnetic field of the magnet 300.
  • the fan 1 is therefore kept rotating slowly also in the event of faults affecting the electrical system, ensuring in any case cooling of the engine fluid (fail safe operation).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
EP11191671.4A 2011-12-02 2011-12-02 Dispositif de transmission du mouvement vers les ventilateurs pour moteurs de refroidissement avec arrêt du ventilateur dans une condition de ralenti Withdrawn EP2599976A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11191671.4A EP2599976A1 (fr) 2011-12-02 2011-12-02 Dispositif de transmission du mouvement vers les ventilateurs pour moteurs de refroidissement avec arrêt du ventilateur dans une condition de ralenti

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11191671.4A EP2599976A1 (fr) 2011-12-02 2011-12-02 Dispositif de transmission du mouvement vers les ventilateurs pour moteurs de refroidissement avec arrêt du ventilateur dans une condition de ralenti

Publications (1)

Publication Number Publication Date
EP2599976A1 true EP2599976A1 (fr) 2013-06-05

Family

ID=45418364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11191671.4A Withdrawn EP2599976A1 (fr) 2011-12-02 2011-12-02 Dispositif de transmission du mouvement vers les ventilateurs pour moteurs de refroidissement avec arrêt du ventilateur dans une condition de ralenti

Country Status (1)

Country Link
EP (1) EP2599976A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518269A (zh) * 2018-04-02 2018-09-11 浙江耐士伦机械有限公司 一种电磁风扇离合器
WO2019097465A1 (fr) * 2017-11-20 2019-05-23 Baruffaldi S.P.A. Dispositif d'entraînement à trois vitesses de ventilateurs pour le refroidissement du liquide de refroidissement dans des véhicules automobiles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886047A2 (fr) * 1997-06-19 1998-12-23 Baruffaldi S.P.A. Dispositif pour transmettre un mouvement à un embrayage électromagnétique et un engrenage planétaire pour des ventilateurs de véhicule
EP1130232A2 (fr) * 2000-02-29 2001-09-05 Baruffaldi S.p.A. Système d'embrayage pour ventilateur de véhicule
EP1640582A1 (fr) * 2004-09-22 2006-03-29 Baruffaldi S.p.A. Dispositif pour transmettre le mouvement aux ventilateurs pour refroidir des moteurs
DE102008047158A1 (de) * 2007-09-17 2009-04-30 Baruffaldi S.P.A. Vorrichtung zum Übertragen des Antriebs auf Flügelräder zum Kühlen von Fahrzeugen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886047A2 (fr) * 1997-06-19 1998-12-23 Baruffaldi S.P.A. Dispositif pour transmettre un mouvement à un embrayage électromagnétique et un engrenage planétaire pour des ventilateurs de véhicule
EP1130232A2 (fr) * 2000-02-29 2001-09-05 Baruffaldi S.p.A. Système d'embrayage pour ventilateur de véhicule
EP1640582A1 (fr) * 2004-09-22 2006-03-29 Baruffaldi S.p.A. Dispositif pour transmettre le mouvement aux ventilateurs pour refroidir des moteurs
DE102008047158A1 (de) * 2007-09-17 2009-04-30 Baruffaldi S.P.A. Vorrichtung zum Übertragen des Antriebs auf Flügelräder zum Kühlen von Fahrzeugen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019097465A1 (fr) * 2017-11-20 2019-05-23 Baruffaldi S.P.A. Dispositif d'entraînement à trois vitesses de ventilateurs pour le refroidissement du liquide de refroidissement dans des véhicules automobiles
CN108518269A (zh) * 2018-04-02 2018-09-11 浙江耐士伦机械有限公司 一种电磁风扇离合器
CN108518269B (zh) * 2018-04-02 2024-01-30 浙江耐士伦机械有限公司 一种电磁风扇离合器

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