WO2008146155A2 - Unité de ventilation - Google Patents

Unité de ventilation Download PDF

Info

Publication number
WO2008146155A2
WO2008146155A2 PCT/IB2008/001409 IB2008001409W WO2008146155A2 WO 2008146155 A2 WO2008146155 A2 WO 2008146155A2 IB 2008001409 W IB2008001409 W IB 2008001409W WO 2008146155 A2 WO2008146155 A2 WO 2008146155A2
Authority
WO
WIPO (PCT)
Prior art keywords
blades
unit according
hub
motor
flow
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.)
Ceased
Application number
PCT/IB2008/001409
Other languages
English (en)
Other versions
WO2008146155A3 (fr
Inventor
Pietro De Filippis
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.)
SPAL Automotive SRL
Original Assignee
SPAL Automotive SRL
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 SPAL Automotive SRL filed Critical SPAL Automotive SRL
Publication of WO2008146155A2 publication Critical patent/WO2008146155A2/fr
Publication of WO2008146155A3 publication Critical patent/WO2008146155A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F01P2005/046—Pump-driving arrangements with electrical pump drive

Definitions

  • This invention relates to a ventilation unit for cooling systems.
  • the invention relates in particular to a ventilation unit of the type comprising an axial fan connected by its hub to an electric motor that drives the fan itself.
  • This specification relates in particular to ventilation units driven by open electric motors, that is to say electric motors whose outside casing has a plurality of through holes for aeration.
  • the motor is at least partly housed in the hub and is suitably positioned and supported by a mounting ring that peripherally surrounds the casing.
  • the hub shields the motor and partly protects it from dirt, dust and other airborne particles, but at the same time reduces cooling efficiency.
  • both shields have respective pluralities of through holes for aeration, allowing air to flow through the motor from the back towards the front thereby cooling the windings, the magnetic circuit, the built-in electronic control components and any other sources of heat inherent in electric motors in general.
  • forced air flows sucked into the motor from the outside atmosphere are produced in several different ways, all based on negative pressure generated inside the hub relative to the pressure of the outside atmosphere.
  • the negative pressure is produced by the Venturi effect created in the air space between the fan hub and the motor mounting ring by the air flow generated by the fan blades.
  • the forced air circulation created by the Venturi effect is usually combined with a forced air circulation directed against the inside face of the hub by the radial stiffening spokes on the front wall of the hub.
  • the air circulation through the motor is generated by the pressure difference at the ends of the fan.
  • the holes in the hub together with those in the front and rear shields provide a fluid dynamic return path for the air flow created by the fan blades.
  • the main technical purpose of the present invention is to propose a ventilation unit capable of more effectively dissipating the heat produced by the electric motor that drives it and by any electronic components built into the motor.
  • Another aim of the invention is to propose a ventilation unit that enables the range of power ratings of the fan drive motors to be extended.
  • a further aim of the invention is to provide a ventilation unit that can be used at much higher temperatures than prior art ventilation units.
  • FIG. 1 illustrates a first preferred embodiment of a ventilation unit according to the invention in a schematic side view not in proportion and partly in cross section, with some parts cut away for greater clarity;
  • FIG. 2 illustrates a second preferred embodiment of a ventilation unit according to the invention in a schematic side view not in proportion and partly in cross section, with some parts cut away for greater clarity;
  • FIG. 3 is a schematic perspective view of a rotary member forming part of the ventilation unit of Figure 1;
  • FIG. 4 is a schematic perspective view of a detail of the rotary member of Figure 3;
  • FIG. 5 illustrates the detail of Figure 4 in a schematic perspective view different from that of Figure 4.
  • the numeral 1 denotes in its entirety a ventilation unit according to this invention.
  • the ventilation unit 1 can be advantageously applied to a cooling system 2, for example, for extracting heat from a radiator 3 of a vehicle (not illustrated).
  • the ventilation unit 1 comprises an electric motor 4 whose drive shaft 5 rotates about an axis of rotation R substantially at right angles to the large faces of the radiator 3.
  • the motor 4 is of the open type, that is to say, equipped with an outer casing 6 having a plurality of through holes 6f for aeration. More specifically, the casing 6 extends around the axis R according to a substantially cylindrical shape and is axially delimited by a front shield 7 and a rear shield 8, both at right angles to the axis R.
  • the shaft 5 extends towards the outside of the casing 6 on the side of the radiator 3, through the front shield 7.
  • the aeration through holes 6f are made both in the front shield 7 and in the rear shield 8 and, in both cases, are distributed uniformly around the axis R.
  • each hole 6f in the front shield 7 is axially aligned with a corresponding hole 6f in the rear shield 8.
  • the unit 1 comprises electronic means 14 for controlling the motor 4 and preferably housed in the casing 6, in the rear shield 8, in a position such as not to obstruct the holes 6f in the latter.
  • the electrical and magnetic characteristics of the motor 4 are of known type and are outside the scope of this invention.
  • the ventilation unit 1 comprises mounting means 9, associated with the motor 4 at the rear shield 8 of the casing 6 and structured in such a way as to connect the unit 1 to external mounting structures falling outside the scope of the invention.
  • the mounting means 9 comprise an annular member 10 for supporting the motor 4.
  • the annular member 10 surrounds and is fixed to the rear shield 8 of the casing 6.
  • a rotary member 11, better illustrated in Figure 3, is connected to the shaft 5 and is driven by the motor 4.
  • the rotary member 11 comprises a plurality of primary blades 12 mounted radially on a central, cup-shaped hub 13 fixed coaxially to the shaft 5 in such a way as to enclose the casing 6 except for the rear shield 8.
  • the blades 12 driven by the motor 4 generate a main air flow F for dissipating heat from the radiator 3.
  • the flow F is directed from the radiator 3 towards the ventilation unit 1.
  • the hub 13 comprises a first substantially tubular cylindrical element 16 and a second element 17, also substantially tubular and cylindrical, positioned outside the first tubular element 16.
  • the first and second tubular elements 16, 17 are coaxial with each other and rotatable about the axis R.
  • a wall 18 closes the first tubular element 16 at the front and makes the hub 13 integral with the drive shaft 5.
  • the hub 13 comprises a plurality of secondary blades 19, not illustrated in Figure 1 but only in Figures 3, 4 and 5, located between the first tubular element 16 and the second tubular element 17 to produce a flow Fl for cooling the motor 4.
  • first tubular element 16 and the second tubular element 17 form an annular duct 20 in which the blades 19 are mounted.
  • the blades 19 extend preferably radially between the first tubular element 16 and the second tubular element 17 inside the annular duct 20.
  • the first tubular element 16, the second tubular element 17 and the blades 19 form an axial fan 21 that is thus contained between two cylindrical surfaces.
  • the annular duct 20 and the air space 15 at least partially form a fluid dynamic circuit 22 for the motor 4 cooling flow Fl.
  • the blades 19 extend radially to an extent that is a function of the total diameter of the rotary member 11, or of the radial size of the blades 12.
  • the blades 19 extend radially for between approximately 20% and 10%, respectively, of the radial size of the blades 12.
  • the blades 19 are of the type known as "slotted split blades" to operate at high head.
  • the blades 19 are shaped to generate high head by minimizing the separation of the fluid vein from the blade and the consequent generation of vortices.
  • the fan 21 is dimensioned to generate a tangential output component of the flow Fl of the same order of magnitude as its axial component.
  • each blade 19 is composed of a plurality of blade sections 23, three in the embodiment illustrated.
  • the blade sections 23 have different inclination angles that increase according to the axial distance from the front wall 18.
  • the blade sections 23 are completely axially offset from each other so as to avoid undercuts and thus enabling the rotary member 11 to be made by die casting.
  • the ventilation unit 1 comprises a flow deflector 24.
  • the deflector 24 contributes to closing the fluid dynamic circuit 22 and is positioned relative to the fan 21 in such a way that the cooling flow Fl is deflected by the whole of the deflector 24.
  • the deflector 24 is suitably positioned to channel into the annular duct 20 the flow Fl that the blades 19 force out of the air space 15.
  • the flow deflector 24 is made at least partially in the rear shield 8 of the casing 6 and at least partially in the mounting means 9 of the unit 1.
  • the deflector 24 comprises an annular baffle 25 substantially curved in cross section, made in the rear shield 8 and axially facing the air space 15.
  • the flow deflector 24 also comprises a second annular baffle 26 having a substantially curved cross section joined to the baffle 25 and substantially facing the annular duct 20, that is to say, the blades 19.
  • the baffle 26 is formed on the annular mounting member 10 of the motor 4.
  • the baffle 25 turns the flow Fl by approximately 90 degrees and the baffle 26 turns it by a further 90 degrees since the annular duct 20 and the air space 15 extend substantially parallel to one another.
  • the casing 6 has on its outside surface a plurality of ribs (not illustrated) that optimize the cooling effect.
  • the ribs run preferably lengthways along the casing 6 creating discontinuity that breaks the laminar motion of the cooling flow around the motor 4, thereby increasing heat exchange.
  • the outside air flows through the motor 4, flowing into the casing 6 through the holes 6f in the rear shield 8 and flowing out of the casing 6 through the holes 6f in the front shield 7, under the action of the fan 21 through the air space 15 and the flow deflector 24.
  • the fluid dynamic circuit 22 for the flow Fl is closed outside the hub 13 between the front outlet of the annular duct 20 and the holes 6f in the rear shield 8. Outside the hub 13, the flow Fl mixes with the larger air flow F that has crossed the radiator 3 and moves towards the blades 12.
  • the ventilation unit 1 is positioned differently relative to the radiator 3.
  • the radiator 3, the rotary member 11 and the motor 4 are positioned in that order from left to right.
  • the ventilation unit 1 is mirrored about a plane at right angles to the axis R, but the rotary member 11 rotates in opposite direction to that described above so that the flow F that extracts heat from the radiator 3 is, in this case too, directed from the radiator 3 towards the ventilation unit 1.
  • the flow direction Fl in the duct 20 is also reversed. Li particular, in the duct 20, the flow Fl comes from the outside of the hub 13 and is directed towards the flow deflector 24.
  • the rotation of the member 11 generates at the flow deflector 24 and in the air space 15 a positive pressure that pushes the flow Fl into the motor 4 through the holes 6f in the shield 7, the rear shield in this case.
  • V is the direction of travel of the vehicle (not illustrated)
  • the direction of the flow F is opposite to the direction V
  • the direction of the flow Fl is the same as the direction V in the annular duct 20 and opposite to the direction V in the air space 15.
  • the outside air flows through the motor 4, flowing into the casing 6 through the holes 6f in the shield 7 and flowing out of the casing 6 through the holes 6f in the shield 8, under the action of the fan 21 through the flow deflector 24 and the air space 15.
  • the fluid dynamic circuit 22 for the flow Fl is closed outside the hub 13 between the holes 6f in the shield 8 and the rear inlet of the annular duct 20. Outside the hub 13, the flow Fl mixes with the larger air flow F that has crossed the radiator 3 and moves towards the blades 12.
  • the fan 21 can generate a cooling flow Fl of considerable volume and velocity capable of highly effectively dissipating the heat produced by the electric motor and its built-in electronic components. This not only enables the range of power ratings of the fan drive motors to be extended but, compared to prior art ventilation units, also allows the ventilation unit according to the invention to operate under conditions of very high ambient temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Catching Or Destruction (AREA)
  • Compressor (AREA)

Abstract

Unité de ventilation (1) dans laquelle un moteur ouvert (4) entraîne de façon rotative un moyeu (13) équipé, à l'extérieur, d'une première série de plusieurs pales (12) formant un ventilateur axial (27); le moteur (4) est logé au moins en partie dans le moyeu (13) et définit avec celui-ci un espace d'air (15) qui fait partie intégrante d'un circuit dynamique de fluide (22) pour l'établissement d'un flux (F1) de refroidissement du moteur (4); le flux de refroidissement (F1) est produit par un ventilateur secondaire (21) comprenant une seconde série de pales (19), à l'intérieur du moyeu (13) proprement dit, et en position coaxiale avec le ventilateur (27) constitué par les pales (12) de la première série.
PCT/IB2008/001409 2007-05-30 2008-05-28 Unité de ventilation Ceased WO2008146155A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2007A000379 2007-05-30
IT000379A ITBO20070379A1 (it) 2007-05-30 2007-05-30 Unita' di ventilazione.

Publications (2)

Publication Number Publication Date
WO2008146155A2 true WO2008146155A2 (fr) 2008-12-04
WO2008146155A3 WO2008146155A3 (fr) 2009-06-04

Family

ID=40316855

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/001409 Ceased WO2008146155A2 (fr) 2007-05-30 2008-05-28 Unité de ventilation

Country Status (2)

Country Link
IT (1) ITBO20070379A1 (fr)
WO (1) WO2008146155A2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012163402A3 (fr) * 2011-05-30 2013-02-21 Valeo Klimasysteme Gmbh Refroidissement du moteur d'un ventilateur
ITTO20120765A1 (it) * 2012-09-05 2014-03-06 Johnson Electric Asti S R L Gruppo di ventilazione, particolarmente per uno scambiatore di calore di un veicolo
ITBO20130272A1 (it) * 2013-05-29 2014-11-30 Spal Automotive Srl Macchina elettrica, ventola, ventilatore.
CN108757525A (zh) * 2018-07-13 2018-11-06 株洲联诚集团控股股份有限公司 一种轴流风机
DE202021001378U1 (de) 2021-04-15 2021-06-16 Brian Havel Luftgekühlter elektrischer Motor mit integrierter Elektronik zum Antrieb eines Gebläses, mit einer Anordnung wo die Elektronik ganz vorne direkt unter der Gebläsenabe positioniert ist um damit die Elektronik wirksamer zu kühlen
WO2024061395A1 (fr) * 2022-09-19 2024-03-28 Hanon Systems Efp Deutschland Gmbh Dispositif pour diriger de l'air de refroidissement vers un support de moteur pour un moteur de ventilateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401462C3 (de) * 1974-01-12 1979-09-06 Sueddeutsche Kuehlerfabrik Julius Fr. Behr, 7000 Stuttgart Lüfter mit Flüssigkeitsreibungskupplung
IT1194156B (it) * 1982-03-15 1988-09-14 Sueddeutsche Kuehler Behr Ventilatore assiale,particolarmente per radiatori di raffreddamento di motori termici raffreddati ad acqua
DE3324076A1 (de) * 1983-03-17 1984-09-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Geblaese fuer die luftumwaelzung in backoefen
EP1657448A1 (fr) * 2004-10-28 2006-05-17 Asmo Co., Ltd. Ventilateur
DE102005006183A1 (de) * 2005-02-10 2006-08-24 Asia Vital Component Co., Ltd., Hsin-Chuan Rotor mit zwangsläufiger Kühlung
DE102005006184A1 (de) * 2005-02-10 2006-08-24 Asia Vital Component Co., Ltd., Hsin-Chuan Rotor mit Kühlwirkung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012163402A3 (fr) * 2011-05-30 2013-02-21 Valeo Klimasysteme Gmbh Refroidissement du moteur d'un ventilateur
ITTO20120765A1 (it) * 2012-09-05 2014-03-06 Johnson Electric Asti S R L Gruppo di ventilazione, particolarmente per uno scambiatore di calore di un veicolo
ITBO20130272A1 (it) * 2013-05-29 2014-11-30 Spal Automotive Srl Macchina elettrica, ventola, ventilatore.
WO2014191902A3 (fr) * 2013-05-29 2016-01-07 Spal Automotive S.R.L. Machine électrique, soufflante, ventilateur
US20160146210A1 (en) * 2013-05-29 2016-05-26 Spal Automotive S.R.L. Electrical machine, fan, ventilator
JP2016524894A (ja) * 2013-05-29 2016-08-18 スパル オートモーティブ ソチエタ レスポンサビリタ リミテ 電気機械、ファン、換気器
RU2655644C2 (ru) * 2013-05-29 2018-05-29 Спаль Аутомотиве С.Р.Л. Электрическая машина, крыльчатка и вентилятор
US10288078B2 (en) 2013-05-29 2019-05-14 Spal Automotive S.R.L. Electrical machine, fan, ventilator
CN108757525A (zh) * 2018-07-13 2018-11-06 株洲联诚集团控股股份有限公司 一种轴流风机
DE202021001378U1 (de) 2021-04-15 2021-06-16 Brian Havel Luftgekühlter elektrischer Motor mit integrierter Elektronik zum Antrieb eines Gebläses, mit einer Anordnung wo die Elektronik ganz vorne direkt unter der Gebläsenabe positioniert ist um damit die Elektronik wirksamer zu kühlen
WO2024061395A1 (fr) * 2022-09-19 2024-03-28 Hanon Systems Efp Deutschland Gmbh Dispositif pour diriger de l'air de refroidissement vers un support de moteur pour un moteur de ventilateur
DE102022123882B4 (de) 2022-09-19 2024-09-26 Hanon Systems Efp Deutschland Gmbh Vorrichtung zum Leiten von Kühlluft an einer Motoraufnahme für einen Ventilatormotor

Also Published As

Publication number Publication date
WO2008146155A3 (fr) 2009-06-04
ITBO20070379A1 (it) 2008-11-30

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