EP2386764A2 - Fan assembly for vehicles - Google Patents
Fan assembly for vehicles Download PDFInfo
- Publication number
- EP2386764A2 EP2386764A2 EP11165462A EP11165462A EP2386764A2 EP 2386764 A2 EP2386764 A2 EP 2386764A2 EP 11165462 A EP11165462 A EP 11165462A EP 11165462 A EP11165462 A EP 11165462A EP 2386764 A2 EP2386764 A2 EP 2386764A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- axis
- rotation
- fan
- toothed ring
- radiator
- 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
Links
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
Images
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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
- F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
-
- 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
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
- F04D29/526—Details of the casing section radially opposing blade tips
-
- 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
- F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
Definitions
- the present invention relates to a fan assembly for cooling a radiator, a radiator-condenser assembly, or a radiator-condenser-intercooler assembly of a vehicle.
- a fan assembly for cooling a radiator or a radiator-condenser assembly of a vehicle comprises a casing, having a through opening, and a motor-fan assembly, carried by the casing and designed to generate a flow of air through said opening.
- the fan is generally of an axial type and comprises a hub, rotatable about an axis of rotation parallel to the direction of the flow, and a plurality of blades, which extend radially from said hub.
- the object of the present invention is to provide an improved geometry of the toothed ring surrounding the fan that, as compared to solutions of a known type, will reduce the tonal component of the noise generated by the fan without altering the efficiency of the system in terms of air-delivery capacity and head.
- the fan assembly 10 is a fan assembly designed to perform cooling of a radiator, of a radiator-condenser assembly, or of a radiator-condenser-intercooler assembly of a vehicle.
- the fan assembly 10 comprises a casing 12 preferably made of injection-moulded plastic material having a shape designed to convey a flow of air through a radiator, a radiator-condenser assembly, or a radiator-condenser-intercooler assembly.
- the casing 12 has a through opening 14 and a support 16 located at the centre of the opening 14.
- the support 16 is connected to the edges of the opening 14 by means of radial arms 18.
- the support 16 carries a motor-fan assembly designated by 20 in Figure 1 .
- the motor-fan assembly 20 comprises an axial fan 22 made of injection-moulded plastic material.
- the fan 22 comprises a hub 24, extending from which is a plurality of blades 26.
- the fan 22 is rotatable with respect to the support 16 about an axis of rotation designated by X in Figure 4 .
- the fan 22 can be provided with an external ring 28 fixed with respect to the outer end of the blades 26.
- the external ring 28, if present, is constituted by a cylindrical wall 30 sharing the axis of rotation X and a radial wall 32 contained in a plane orthogonal with respect to the axis of rotation X.
- the casing 12 comprises a toothed ring 34 fixed or else formed integrally with the casing and located along the edge of the opening 14.
- the toothed ring 34 surrounds the fan 22 and is provided with a plurality of teeth 36 that follow one another with a constant pitch in a circumferential direction.
- the teeth 36 can extend in a uniform way along a circumference or else can extend on arcs of circumference that are set at angular distances apart.
- the toothed ring 34 has a front surface 38 that is cylindrical or shaped like a truncated cone, shares the axis of rotation X, and defines the walls of the teeth 36 facing the fan.
- the wall 38 is set at a constant or variable distance in the direction of the axis X from the outer end of the fan 22 or, if present, from the cylindrical wall 30 of the external ring 28.
- the toothed ring 34 moreover has a side wall 40 that forms the sides of the teeth 36.
- the distance in a direction parallel to the axis of rotation X between the side wall 40 and a plane orthogonal to the axis of rotation X varies in a periodic way in the circumferential direction.
- the teeth 36 project in a direction parallel to the axis of rotation X with respect to a radial plane passing through the base of said teeth.
- the teeth 36 can have an undulated profile as illustrated in the figures or else can have a sawtooth shape or a shape of some other type.
- the length L of an arc of a circle with centre on the axis of rotation X of the fan 22 and passing through each tooth 36 remains constant for each radius comprised between the radii R1 and R2, where R1 and R2 are the internal radius and the external radius of the circumferential surfaces of the teeth 36.
- the axial arrangement of the teeth 36 enables provision of a periodic sequence of cavities.
- the purpose of the toothed ring 34 is to provide a circumferential coupling to the fan of a sequence of volumes designed to dissipate the radial component of the fluctuations of lift generated by the blades.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
- a casing (12), having a through opening (14) and a support (16) , which is located at the centre of said opening (14);
- a motor-fan assembly (20) carried by said support (16), which includes an axial fan (22) rotatable with respect to said support (16) about an axis of rotation (X); and
- a toothed ring (34), which is fixed with respect to the casing (12) and surrounds said fan (22) said toothed ring (34) having a plurality of teeth (36) that follow one another in a circumferential direction,
wherein said toothed ring (34) has a front surface (38) sharing the axis of rotation (X) and a side wall (40) that forms sides of said teeth (36), where the distance in a direction parallel to the axis of rotation (X) between said side wall (40) and a plane orthogonal to the axis of rotation (X) varies periodically in a circumferential direction.
Description
- The present invention relates to a fan assembly for cooling a radiator, a radiator-condenser assembly, or a radiator-condenser-intercooler assembly of a vehicle.
- A fan assembly for cooling a radiator or a radiator-condenser assembly of a vehicle comprises a casing, having a through opening, and a motor-fan assembly, carried by the casing and designed to generate a flow of air through said opening. The fan is generally of an axial type and comprises a hub, rotatable about an axis of rotation parallel to the direction of the flow, and a plurality of blades, which extend radially from said hub.
- The documents Nos.
US6863496 andUS7481615 describe fan assemblies for vehicles in which the casing comprises a toothed ring that surrounds the fan. Said toothed ring has the purpose of reducing the vortices that are generated in the gap between the outer end of the fan and the casing. These documents describe solutions in which the toothed ring that surrounds the fan is provided with projections with sawtooth or undulated profile, which project towards the fan in a plane orthogonal to the axis of rotation of the fan. - The object of the present invention is to provide an improved geometry of the toothed ring surrounding the fan that, as compared to solutions of a known type, will reduce the tonal component of the noise generated by the fan without altering the efficiency of the system in terms of air-delivery capacity and head.
- According to the present invention, the above purpose is achieved by a fan assembly having the characteristics forming the subject of
Claim 1. - The claims form an integral part of the teaching provided herein in relation to the invention.
- The present invention will now be described in detail with reference to the attached drawings, which are provided purely by way of non-limiting example and in which:
-
Figure 1 is a perspective view of a fan assembly according to the present invention; -
Figure 2 is a perspective view of the casing indicated by the arrow II inFigure 1 ; -
Figure 3 is an enlarged detail of the part indicated by the arrow III inFigure 1 ; -
Figure 4 is a cross section according to the line IV-IV ofFigure 1 ; and -
Figure 5 is a schematic cross section according to the line V-V ofFigure 4 . - With reference to
Figure 1 , designated by 10 is a fan assembly designed to perform cooling of a radiator, of a radiator-condenser assembly, or of a radiator-condenser-intercooler assembly of a vehicle. Thefan assembly 10 comprises acasing 12 preferably made of injection-moulded plastic material having a shape designed to convey a flow of air through a radiator, a radiator-condenser assembly, or a radiator-condenser-intercooler assembly. - With reference in particular to
Figure 2 , thecasing 12 has a through opening 14 and asupport 16 located at the centre of the opening 14. Thesupport 16 is connected to the edges of theopening 14 by means ofradial arms 18. Thesupport 16 carries a motor-fan assembly designated by 20 inFigure 1 . The motor-fan assembly 20 comprises anaxial fan 22 made of injection-moulded plastic material. Thefan 22 comprises ahub 24, extending from which is a plurality ofblades 26. Thefan 22 is rotatable with respect to thesupport 16 about an axis of rotation designated by X inFigure 4 . - As may be seen in particular in
Figure 3 , thefan 22 can be provided with anexternal ring 28 fixed with respect to the outer end of theblades 26. Theexternal ring 28, if present, is constituted by acylindrical wall 30 sharing the axis of rotation X and aradial wall 32 contained in a plane orthogonal with respect to the axis of rotation X. - The
casing 12 comprises atoothed ring 34 fixed or else formed integrally with the casing and located along the edge of theopening 14. Thetoothed ring 34 surrounds thefan 22 and is provided with a plurality ofteeth 36 that follow one another with a constant pitch in a circumferential direction. Theteeth 36 can extend in a uniform way along a circumference or else can extend on arcs of circumference that are set at angular distances apart. - With reference to
Figures 3 and4 , thetoothed ring 34 has afront surface 38 that is cylindrical or shaped like a truncated cone, shares the axis of rotation X, and defines the walls of theteeth 36 facing the fan. Thewall 38 is set at a constant or variable distance in the direction of the axis X from the outer end of thefan 22 or, if present, from thecylindrical wall 30 of theexternal ring 28. - The
toothed ring 34 moreover has aside wall 40 that forms the sides of theteeth 36. The distance in a direction parallel to the axis of rotation X between theside wall 40 and a plane orthogonal to the axis of rotation X varies in a periodic way in the circumferential direction. In practice, theteeth 36 project in a direction parallel to the axis of rotation X with respect to a radial plane passing through the base of said teeth. Theteeth 36 can have an undulated profile as illustrated in the figures or else can have a sawtooth shape or a shape of some other type. - With reference to
Figure 5 , the length L of an arc of a circle with centre on the axis of rotation X of thefan 22 and passing through eachtooth 36 remains constant for each radius comprised between the radii R1 and R2, where R1 and R2 are the internal radius and the external radius of the circumferential surfaces of theteeth 36. - The axial arrangement of the
teeth 36 enables provision of a periodic sequence of cavities. - The purpose of the
toothed ring 34 is to provide a circumferential coupling to the fan of a sequence of volumes designed to dissipate the radial component of the fluctuations of lift generated by the blades. - The irregularity of the coupled surface has two effects:
- 1) it favours effects of diffraction and diffusion of the pressure waves in a plane perpendicular to the axis of the fan (X) that render the spatial distribution of the waves of acoustic pressure random; this reduces the tonal component of the noise generated;
- 2) it induces formation of vortices within the compartments, which have the effect of reducing the cross section from the fluid-dynamic standpoint, thus preserving the fluid-dynamic performance(capacity/head).
Claims (4)
- A fan assembly for cooling a radiator, a radiator-condenser assembly, or a radiator-condenser-intercooler assembly of a vehicle, comprising:- a casing (12), having a through opening (14) and a support (16), which is located at the centre of said opening (14),- a motor-fan assembly (20) carried by said support (16), which includes an axial fan (22) rotatable with respect to said support (16) about an axis of rotation (X), and- a toothed ring (34), fixed with respect to the casing (12) and surrounding said fan (22), said toothed ring (34) having a plurality of teeth (36) that follow one another in a circumferential direction,
said fan assembly being characterized in that said toothed ring (34) has a front surface (38) that is cylindrical or shaped like a truncated cone, sharing the axis of rotation (X) and set at a constant or variable distance in the direction of the axis of rotation (X) with respect to a radially outer end of said fan (22), and a side wall (40) that forms sides of said teeth (36), wherein the distance in a direction parallel to the axis of rotation (X) between said side wall (40) and a plane orthogonal to the axis of rotation (X) varies periodically in the circumferential direction. - The fan assembly according to Claim 1, characterized in that said side wall (40) has an undulated or a sawtooth profile.
- The fan assembly according to Claim 1, characterized in that said fan (22) has an external circumferential collar (28) having a cylindrical wall (30), sharing said axis of rotation (X), and a radial wall (32), contained in a plane orthogonal to said axis of rotation (X), and in that the distance in a radial direction between the cylindrical wall (30) of the external circumferential collar (28) and said front wall (38) of said toothed ring (34) is constant and the distance in a direction parallel to the axis of rotation (X) between the radial wall (32) of the external circumferential collar (28) and said side wall (40) of said toothed ring (34) varies periodically in the circumferential direction.
- The fan assembly according to Claim 1, characterized in that the width (L) of an arc of a circle centred on the axis of rotation (X) of the fan (22) and passing through each tooth (36) remains constant for each radius comprised between the radii (R1, R2) of the internal and external circumferential surfaces of the teeth (36).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO2010A000393A IT1399992B1 (en) | 2010-05-11 | 2010-05-11 | FAN ASSEMBLY FOR VEHICLES |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2386764A2 true EP2386764A2 (en) | 2011-11-16 |
EP2386764A3 EP2386764A3 (en) | 2017-11-15 |
EP2386764B1 EP2386764B1 (en) | 2019-12-04 |
Family
ID=43301980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11165462.0A Active EP2386764B1 (en) | 2010-05-11 | 2011-05-10 | Fan assembly for vehicles |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2386764B1 (en) |
IT (1) | IT1399992B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012207552A1 (en) * | 2011-05-13 | 2012-11-15 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Cooling fan module |
WO2020169546A1 (en) * | 2019-02-18 | 2020-08-27 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Cooling fan of a motor vehicle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6863496B2 (en) | 2002-02-27 | 2005-03-08 | Halla Climate Control Corporation | Fan and shroud assembly |
US7481615B2 (en) | 2005-03-26 | 2009-01-27 | Halla Climate Control Corp. | Fan and shroud assembly |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6874990B2 (en) * | 2003-01-29 | 2005-04-05 | Siemens Vdo Automotive Inc. | Integral tip seal in a fan-shroud structure |
EP1515000B1 (en) * | 2003-09-09 | 2016-03-09 | Alstom Technology Ltd | Blading of a turbomachine with contoured shrouds |
-
2010
- 2010-05-11 IT ITTO2010A000393A patent/IT1399992B1/en active
-
2011
- 2011-05-10 EP EP11165462.0A patent/EP2386764B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6863496B2 (en) | 2002-02-27 | 2005-03-08 | Halla Climate Control Corporation | Fan and shroud assembly |
US7481615B2 (en) | 2005-03-26 | 2009-01-27 | Halla Climate Control Corp. | Fan and shroud assembly |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012207552A1 (en) * | 2011-05-13 | 2012-11-15 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Cooling fan module |
US9714666B2 (en) | 2011-05-13 | 2017-07-25 | Brose Fahrzeugteile Gmbh & Co. Kg | Cooling fan module |
WO2020169546A1 (en) * | 2019-02-18 | 2020-08-27 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Cooling fan of a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
ITTO20100393A1 (en) | 2011-11-12 |
EP2386764A3 (en) | 2017-11-15 |
IT1399992B1 (en) | 2013-05-09 |
EP2386764B1 (en) | 2019-12-04 |
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