US3627445A - Ventilating device for cooling a heat engine - Google Patents

Ventilating device for cooling a heat engine Download PDF

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Publication number
US3627445A
US3627445A US815975A US3627445DA US3627445A US 3627445 A US3627445 A US 3627445A US 815975 A US815975 A US 815975A US 3627445D A US3627445D A US 3627445DA US 3627445 A US3627445 A US 3627445A
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US
United States
Prior art keywords
fan
heat
armature
driven
cooling
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
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US815975A
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English (en)
Inventor
Francois Andriussi
Pierre Rouques
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S E R M A G SOC D ETUDES ET
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S E R M A G SOC D ETUDES ET
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Filing date
Publication date
Priority claimed from FR148308A external-priority patent/FR95154E/fr
Application filed by S E R M A G SOC D ETUDES ET filed Critical S E R M A G SOC D ETUDES ET
Application granted granted Critical
Publication of US3627445A publication Critical patent/US3627445A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • This device comprises in combination with a driven fan rotor and a generally coaxial driving shaft driven by the engine to be cooled, two magnetic elements associated without mechanical contact, one of said elements being integral with the driving shaft and the other. with the driven rotor, one of said elements constituting an inductor and the other element an induced element or armature which also has the property of a permanent magnet and is of such shape and size that it is subjected to the magnetization of the inductor.
  • the drive is through magnetic means whose principle of operation is'known as a .hysteresis drive,” that is, a drive with an automatic slip beyond a maximum transmissible torque.
  • the inductor is preferably multipolar and electromagnetic or preferably has a permanent magnet.
  • the armature As concerns the armature, it is of a permanent magnet material, in particular of the type of those generally known as hysteretic alloys in which iron can receive isolated or combined additions of carbon, chromium, tungsten, cobalt etc., or of the nickel-aluminum-iron type.
  • the dimensions and magnetic properties of the armature are so arranged that the armature is subjected to the magnetization of the inductor.
  • the hysteresis drive must, when slip occurs, dissipate power equal to the torque transmitted multiplied by the relative slip speed.
  • the energy is dissipated exclusively in the hysteretic armature material all the elements of which are, during slip, magnetized alternately in one direction and the other in passing through a hysteresis cycle which is characteristic of the material.
  • the energy lost in each element of the induced material is proportional to the area of the hysteresis cycle.
  • the object of the invention is to provide a device of the type described in said patent specification which is so improved as to enhance the cooling conditions.
  • the invention provides a device in which the part which constitutes the armature and must dissipate the heat is located at the end of the device facing the stream of air created by the fan.
  • this part constituting the armature is the driving part of the device and provided with cooling fins whereas the inductor, which is driven, is integral with the fan, which may be of plastics material.
  • the part constituting the armature is driven and integral with the fan, which is of a material which is a good heat conductor, the inductor constituting the driving part and being connected to the drive shaft.
  • FIGS. 1-3 are diametral axial sectional views of three embodiments of the invention.
  • hysteretic armature 4 has the shape of a flat ring and is incorporated in the part 24, by moulding it therein or mechanically,
  • the part 24 being of a material which is a good conductor of heat and carries projecting portions in the form of fins 25 whose function is to facilitate the heat exchange therewith.
  • This part is advantageously of aluminum alloy.
  • the driving armature 4 cooperates with a driven inductor 5 integral with the hub 7 which is freely mounted on the shaft 1 through a bearing 9 and carries fan blading l3.
  • FIG. 2 shows a modification of the same arrangement in which the hysteretic armature 4 has its own cooling fins 25, the assembly (4,25) being connected through radial arms 26 to a'hub 27 for fixing to the shaft 1.
  • the driven elements related to the inductor 5 and in particular the fan blading 13 undergo no heating due to the dissipation of energy which occurs entirely in the driving part 4 and are therefore very sensitive to the surrounding temperature.
  • This property enables the driven parts, and mainly the blading 13, to be made of a synthetic material having a low softening temperature such as a thermoplastic material.
  • a synthetic material having a low softening temperature such as a thermoplastic material.
  • propylene, polyamide or acetal can be employed.
  • FIG. 2 shows a blading l3 integral with the hub 7 which is made of synthetic material in the same way as the blading. This results in a remarkably simple, robust and practical construction.
  • FIG. 3 shows another arrangement in which the hysteretic armature 4 is also located in the front of the device, but is driven as described in the above-referred patent application. It is incorporated with the fan blading 13 by moulding it therein or mechanically; in which case the blading 13 must be of a material which is a good conductor of heat. In this arrangement, the whole of the fan blading performs the function of a radiator by ofiering a large area of contact with the air of the atmosphere which it puts into motion.
  • the inductor 5 is, in this modification, the driving element and is integral with the shaftl.
  • a ventilating device for cooling a heat engine comprising in combination with a driven fan rotor and a generally coaxial driving shaft driven by the engine to be cooled, a coupling comprising two magnetic elements associated to each other without mechanical contact, said elements being fixed to the driving shaft and to the driven rotor respectively and constituting an inductor element and an induced element, the latter being of a ferromagnetic permanent magnet material and subjected the magnetization of the inductor element, said inductor element having at least two complementary poles, thereby to permit an hysteretic slip coupling drive of said driven fan rotor with said driving shaft beyond a maximal predetermined torque, the improvement wherein said induced element which must dissipate heat is located at the end of the device adjacent the fan, the material of said induced element having good heat conducting property and having a surface to be encountered by said air stream created by the driven fan so that heat will dissipate.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US815975A 1968-04-17 1969-04-14 Ventilating device for cooling a heat engine Expired - Lifetime US3627445A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR148308A FR95154E (fr) 1966-06-27 1968-04-17 Dispositif de ventilation destiné au refroidissement d'un moteur thermique.

Publications (1)

Publication Number Publication Date
US3627445A true US3627445A (en) 1971-12-14

Family

ID=8649045

Family Applications (1)

Application Number Title Priority Date Filing Date
US815975A Expired - Lifetime US3627445A (en) 1968-04-17 1969-04-14 Ventilating device for cooling a heat engine

Country Status (6)

Country Link
US (1) US3627445A (nl)
BE (1) BE731585A (nl)
DE (1) DE1919272A1 (nl)
GB (2) GB1272050A (nl)
NL (1) NL158888B (nl)
SE (1) SE351008B (nl)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049985A (en) * 1975-06-18 1977-09-20 Vdo Adolf Schindling Ag Damping device for a stepper motor
US4153389A (en) * 1978-01-20 1979-05-08 Boyd Keith A Fan-fan drive assembly
US4643644A (en) * 1983-10-26 1987-02-17 F.F. Seeley Nominees Pty., Ltd. Shaft and pulley assembly
US4645432A (en) * 1986-02-14 1987-02-24 General Motors Corporation Magnetic drive vehicle coolant pump
US5096024A (en) * 1990-08-10 1992-03-17 Wu Hung Chi Adjustable magnetic brake
FR2819119A1 (fr) * 2000-10-30 2002-07-05 Valeo Equip Electr Moteur Machine electrique comportant un ventilateur entraine par couplage magnetique, et alternateur de vehicule automobile
US6468163B1 (en) * 1998-11-19 2002-10-22 Baruffaldi S.P.A. Device for transmitting the movement for motor-vehicle fans with a front-linkage induction coupling
US6548929B2 (en) * 2000-05-03 2003-04-15 Horton, Inc. Eddy current fan drive
US6634476B2 (en) * 2000-10-20 2003-10-21 Usui Kokusai Sangyo Kaisha, Limited Magnet type fan clutch apparatus
US20040202539A1 (en) * 2001-05-09 2004-10-14 Andreas Blank Rotor disk

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5775545A (en) * 1980-10-24 1982-05-12 Mitsubishi Electric Corp Rotary electric machine
DE3145947A1 (de) * 1981-11-20 1983-06-01 Bayerische Motoren Werke AG, 8000 München Kuehlvorrichtung fuer einen stromgenerator
US5613586A (en) * 1994-02-25 1997-03-25 Horton, Inc. Rotational control apparatus
US5636719A (en) * 1994-02-25 1997-06-10 Horton, Inc. Rotational control apparatus
WO1998035169A1 (en) * 1997-02-12 1998-08-13 Horton, Inc. Integral steel-aluminum ring for eddy current activated friction clutch
AU2009314030B2 (en) 2008-11-12 2014-03-06 Horton, Inc. Two-speed clutch and retro-fit kit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2053425A (en) * 1933-12-16 1936-09-08 Westinghouse Electric & Mfg Co Electric motor
US2527237A (en) * 1949-11-30 1950-10-24 Gen Electric Temperature compensation for hysteresis clutch drives
US3220484A (en) * 1963-04-11 1965-11-30 Dowty Hydraulic Units Ltd Cooling fans

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2053425A (en) * 1933-12-16 1936-09-08 Westinghouse Electric & Mfg Co Electric motor
US2527237A (en) * 1949-11-30 1950-10-24 Gen Electric Temperature compensation for hysteresis clutch drives
US3220484A (en) * 1963-04-11 1965-11-30 Dowty Hydraulic Units Ltd Cooling fans

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049985A (en) * 1975-06-18 1977-09-20 Vdo Adolf Schindling Ag Damping device for a stepper motor
US4153389A (en) * 1978-01-20 1979-05-08 Boyd Keith A Fan-fan drive assembly
US4643644A (en) * 1983-10-26 1987-02-17 F.F. Seeley Nominees Pty., Ltd. Shaft and pulley assembly
US4645432A (en) * 1986-02-14 1987-02-24 General Motors Corporation Magnetic drive vehicle coolant pump
US5096024A (en) * 1990-08-10 1992-03-17 Wu Hung Chi Adjustable magnetic brake
US6468163B1 (en) * 1998-11-19 2002-10-22 Baruffaldi S.P.A. Device for transmitting the movement for motor-vehicle fans with a front-linkage induction coupling
US6548929B2 (en) * 2000-05-03 2003-04-15 Horton, Inc. Eddy current fan drive
US6634476B2 (en) * 2000-10-20 2003-10-21 Usui Kokusai Sangyo Kaisha, Limited Magnet type fan clutch apparatus
US6811009B2 (en) * 2000-10-20 2004-11-02 Usui Kokusai Sangyo Kaisha Limited Magnet type fan clutch apparatus
FR2819119A1 (fr) * 2000-10-30 2002-07-05 Valeo Equip Electr Moteur Machine electrique comportant un ventilateur entraine par couplage magnetique, et alternateur de vehicule automobile
US20040202539A1 (en) * 2001-05-09 2004-10-14 Andreas Blank Rotor disk

Also Published As

Publication number Publication date
NL158888B (nl) 1978-12-15
GB1268444A (en) 1972-03-29
SE351008B (nl) 1972-11-13
DE1919272A1 (de) 1970-09-03
BE731585A (nl) 1969-10-01
NL6905891A (nl) 1969-10-21
GB1272050A (en) 1972-04-26

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