EP0703367A2 - Air conveying system for internal combustion engine radiators - Google Patents

Air conveying system for internal combustion engine radiators Download PDF

Info

Publication number
EP0703367A2
EP0703367A2 EP95202453A EP95202453A EP0703367A2 EP 0703367 A2 EP0703367 A2 EP 0703367A2 EP 95202453 A EP95202453 A EP 95202453A EP 95202453 A EP95202453 A EP 95202453A EP 0703367 A2 EP0703367 A2 EP 0703367A2
Authority
EP
European Patent Office
Prior art keywords
radiator
fan
hole
edge
internal combustion
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.)
Granted
Application number
EP95202453A
Other languages
German (de)
French (fr)
Other versions
EP0703367B1 (en
EP0703367A3 (en
Inventor
Giorgio Lombardini
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.)
Lombardini SRL
Original Assignee
Lombardini Fabbrica Italiana Motori 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 Lombardini Fabbrica Italiana Motori SpA filed Critical Lombardini Fabbrica Italiana Motori SpA
Publication of EP0703367A2 publication Critical patent/EP0703367A2/en
Publication of EP0703367A3 publication Critical patent/EP0703367A3/en
Application granted granted Critical
Publication of EP0703367B1 publication Critical patent/EP0703367B1/en
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts

Definitions

  • This invention relates to a system for conveying the air flow generated by a fan and directed against a cooling radiator, such as the cooling radiator of an internal combustion engine.
  • the fan is positioned generally downstream of or behind the radiator with reference to the vehicle running direction, in order to enhance the air flow spontaneously generated by the vehicle movement.
  • fans which draw air through the radiator are of poor efficiency, this being remedied by encasing them and at least partly tube-enveloping them by providing a cylindrical tube portion fixed to the ends of the fan blades.
  • the fan draws peripheral external air through the space defined between the edge of the channel and the edge of the tube rigid with the fan blades, this air obviously not having passed through the radiator so that not only is the noise reduced, but also the fan efficiency.
  • the object of the present invention is to provide a conveying system for the fan-generated cooling air of a radiator, which has high efficiency and noiseless operation.
  • a tube-enveloped and encased fan directing its air flow towards the radiator, its blades being rigid with an outer tube having that edge on the suction side of the fan contained in a stationary circular channel of U cross-section facing the fan.
  • Figure 1 is a partial vertical section through the invention.
  • Figure 2 shows an enlarged detail of Figure 1.
  • the figures show a normal radiator 1 of the type used in internal combustion engines, its peripheral edge being provided with a casing 2 which converges in usual manner, not shown, into a hole 3.
  • a fan 4 the blades 5 of which are fixed to a hub 6, is partly inserted into the hole 3.
  • the outer edge of the channel 8 is conveniently spaced from the edge of the hole 3 of the casing 2 to create a cylindrical aperture 9.
  • the direction of rotation of the blades 5 is such that they convey air towards the radiator 1.
  • the air conveyed by the blades is drawn partly from the central space of the channel in accordance with the arrows 10, and partly through the cylindrical aperture 9 in accordance with the arrows 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

An air conveying system for internal combustion engine radiators, comprising a radiator, a casing connecting the edge of this latter to a circular hole, and a tube-enveloped fan partly inserted into said hole, its direction of rotation being such that it generates an air flow directed towards the radiator, that edge of the fan-surrounding tube which is distant from the radiator extending into a portion not containing blades and partly inserted into the cavity of a stationary circular channel positioned at a distance from the hole in the casing which receives the fan.

Description

  • This invention relates to a system for conveying the air flow generated by a fan and directed against a cooling radiator, such as the cooling radiator of an internal combustion engine.
  • To increase the efficiency of the air flow produced by the normal fans coupled to the cooling radiators of internal combustion engines, it has been usual for some time to channel said flow by means of suitable casings.
  • The fan is positioned generally downstream of or behind the radiator with reference to the vehicle running direction, in order to enhance the air flow spontaneously generated by the vehicle movement.
  • This arrangement, by which the fan draws air through the radiator, has also generally been used for industrial engines, which being stationary are unable to benefit from any air flow spontaneously traversing the radiator.
  • As stated, fans which draw air through the radiator are of poor efficiency, this being remedied by encasing them and at least partly tube-enveloping them by providing a cylindrical tube portion fixed to the ends of the fan blades.
  • This arrangement, which is very efficient from the efficiency viewpoint, has the drawback of being noisy to the point of encountering serious limitations on its application.
  • This has been remedied by providing a circular channel in proximity to the tube edge to receive the fan, this having largely solved the problem.
  • The fan draws peripheral external air through the space defined between the edge of the channel and the edge of the tube rigid with the fan blades, this air obviously not having passed through the radiator so that not only is the noise reduced, but also the fan efficiency.
  • The object of the present invention is to provide a conveying system for the fan-generated cooling air of a radiator, which has high efficiency and noiseless operation.
  • This object is attained according to the invention by a tube-enveloped and encased fan directing its air flow towards the radiator, its blades being rigid with an outer tube having that edge on the suction side of the fan contained in a stationary circular channel of U cross-section facing the fan.
  • The operational and constructional merits and characteristics of the invention will be more apparent from the detailed description given hereinafter with reference to the figures of the accompanying drawings, which illustrate a preferred embodiment thereof by way of non-limiting example.
  • Figure 1 is a partial vertical section through the invention.
    Figure 2 shows an enlarged detail of Figure 1.
  • The figures show a normal radiator 1 of the type used in internal combustion engines, its peripheral edge being provided with a casing 2 which converges in usual manner, not shown, into a hole 3.
  • A fan 4, the blades 5 of which are fixed to a hub 6, is partly inserted into the hole 3.
  • To the outer edge of the blades 5 there is fixed, for example by welding or formed integrally with the blades, a tube 7 having that edge more distant from the radiator 1 extending into a portion which is partly inserted into a stationary circular channel 8 having its concavity facing the fan 4.
  • The outer edge of the channel 8 is conveniently spaced from the edge of the hole 3 of the casing 2 to create a cylindrical aperture 9.
  • The direction of rotation of the blades 5 is such that they convey air towards the radiator 1.
  • The air conveyed by the blades is drawn partly from the central space of the channel in accordance with the arrows 10, and partly through the cylindrical aperture 9 in accordance with the arrows 11.
  • All the air conveyed by the blades is therefore directed against the radiator, from which the efficiency of the invention mainly derives.
  • It has also been surprisingly found that the presence of the secondary air flow conveyed through the channel 8 in accordance with the arrows 11 reduces air turbulence in the region close to the end of the blades, further increasing the system efficiency.

Claims (4)

  1. An air conveying system for internal combustion engine radiators, comprising a radiator, a casing connecting the edge of this latter to a circular hole, and a tube-enveloped fan partly inserted into said hole, its direction of rotation being such that it generates an air flow directed towards the radiator, characterised in that that edge of the fan-surrounding tube which is distant from the radiator extends into a portion not containing blades and partly inserted into the cavity of a stationary circular channel positioned at a distance from the hole in the casing which receives the fan.
  2. A system as claimed in claim 1, characterised in that said radiator is of square shape.
  3. A system as claimed in claim 1, characterised in that said radiator is of rectangular shape.
  4. A system as claimed in claim 1, characterised in that the channel is of C cross-section.
EP95202453A 1994-09-21 1995-09-11 Air conveying system for internal combustion engine radiators Expired - Lifetime EP0703367B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE940078A IT1269656B (en) 1994-09-21 1994-09-21 AIR CONVEYING SYSTEM FOR C.I. ENGINE RADIATORS
ITRE940078 1994-09-21

Publications (3)

Publication Number Publication Date
EP0703367A2 true EP0703367A2 (en) 1996-03-27
EP0703367A3 EP0703367A3 (en) 1997-01-08
EP0703367B1 EP0703367B1 (en) 2001-11-28

Family

ID=11398657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95202453A Expired - Lifetime EP0703367B1 (en) 1994-09-21 1995-09-11 Air conveying system for internal combustion engine radiators

Country Status (4)

Country Link
EP (1) EP0703367B1 (en)
DE (1) DE69524169T2 (en)
ES (1) ES2168332T3 (en)
IT (1) IT1269656B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040443A1 (en) * 2006-10-04 2008-04-10 Behr Gmbh & Co. Kg Axial fan for conveying cooling air for a cooling device of a motor vehicle
EP2180194A1 (en) * 2008-10-24 2010-04-28 Punker GmbH Fan device
FR3075324A1 (en) * 2017-12-20 2019-06-21 Valeo Systemes Thermiques ACOUSTIC MASK AND SUPPORT FOR CORRESPONDING VENTILATION DEVICE

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049076B4 (en) 2006-10-13 2019-09-26 Mahle International Gmbh Axial fan arranged to promote cooling air for a cooling device of a motor vehicle
DE102012207552A1 (en) * 2011-05-13 2012-11-15 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Cooling fan module

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156609A (en) * 1955-09-01 1958-05-19 Paul Pollrich & Comp Suction cover for radial and axial fans
US3903960A (en) * 1973-12-26 1975-09-09 Int Harvester Co Fan shroud entrance structure
DE3304297A1 (en) * 1982-03-15 1984-03-15 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Axial fan, especially for a cooler of a water-cooled internal combustion engine
DE3804217A1 (en) * 1988-02-11 1989-08-24 Bosch Gmbh Robert AXIAL FAN
DE4014496C1 (en) * 1990-05-07 1991-07-18 Audi Ag, 8070 Ingolstadt, De Cooling system between radiator and engine of motor vehicle - includes plastic section fixed to radiator and guide collar made of soft elastic elastomer which surrounds fan blades
FR2683599B1 (en) * 1991-11-07 1994-03-04 Ecia IMPROVED FAIRING FOR FAN AND ITS APPLICATION TO A MOTOR FAN GROUP OF AUTOMOBILE.

Non-Patent Citations (1)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040443A1 (en) * 2006-10-04 2008-04-10 Behr Gmbh & Co. Kg Axial fan for conveying cooling air for a cooling device of a motor vehicle
US8277180B2 (en) 2006-10-04 2012-10-02 Behr Gmbh & Co. Kg Axial fan for conveying cooling air for a cooling device of a motor vehicle
EP2180194A1 (en) * 2008-10-24 2010-04-28 Punker GmbH Fan device
FR3075324A1 (en) * 2017-12-20 2019-06-21 Valeo Systemes Thermiques ACOUSTIC MASK AND SUPPORT FOR CORRESPONDING VENTILATION DEVICE
WO2019122764A1 (en) * 2017-12-20 2019-06-27 Valeo Systemes Thermiques Acoustic mask and support comprising same for a ventilation device

Also Published As

Publication number Publication date
DE69524169D1 (en) 2002-01-10
ES2168332T3 (en) 2002-06-16
DE69524169T2 (en) 2002-07-18
ITRE940078A1 (en) 1996-03-21
EP0703367B1 (en) 2001-11-28
ITRE940078A0 (en) 1994-09-21
EP0703367A3 (en) 1997-01-08
IT1269656B (en) 1997-04-08

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