EP0293825A1 - Axial fan rotor for cooling the radiator of the cooling system of an internal combustion engine for motor vehicles - Google Patents
Axial fan rotor for cooling the radiator of the cooling system of an internal combustion engine for motor vehicles Download PDFInfo
- Publication number
- EP0293825A1 EP0293825A1 EP88108677A EP88108677A EP0293825A1 EP 0293825 A1 EP0293825 A1 EP 0293825A1 EP 88108677 A EP88108677 A EP 88108677A EP 88108677 A EP88108677 A EP 88108677A EP 0293825 A1 EP0293825 A1 EP 0293825A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- radiator
- axial fan
- internal combustion
- motor vehicles
- 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
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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
Definitions
- the present invention relates in general to axial fans intended to be used for cooling the radiator of the cooling system of internal combustion engines for motor vehicles.
- the invention concerns an axial fan rotor of the type comprising a hub carrying a ring of radial blades.
- the object of the present invention is to produce an axial fan rotor of the above-specified type, having a conformation which provides improved performance in terms of efficiency and quietness of operation.
- each blade has the following combination of characteristics: - the leading edge is curved backwardly and has a hyperbolic profile when viewed both from the front and from the side; - the trailing edge is straight, and - the angle of keying is a hyperbolic function of the radial co-ordinate of the blade.
- an axial fan rotor for cooling the radiator of the cooling system of an internal combustion engine for motor vehicles is generally indicated 1.
- the rotor 1 which is conveniently made in one piece from moulded plastics material, comprises a central hub 2 from which a circumferential ring of curved radial blades 3 extends.
- each blade 3 has a leading edge 3a which, as can clearly be seen in Figures 3 and 4, is curved backwardly and has a hyperbolic profile when viewed both from the side ( Figure 3) and from the front ( Figure 4).
- the trailing edge 3b of each blade 3 is straight.
- the angle at which each blade is keyed to the hub 2 varies hyperbolically in dependence on the radial co-ordinate of the blade.
- the fan according to the invention enables a better performance and quieter operation to be achieved in use, compared with conventional rotors.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- The present invention relates in general to axial fans intended to be used for cooling the radiator of the cooling system of internal combustion engines for motor vehicles.
- More particularly, the invention concerns an axial fan rotor of the type comprising a hub carrying a ring of radial blades.
- The object of the present invention is to produce an axial fan rotor of the above-specified type, having a conformation which provides improved performance in terms of efficiency and quietness of operation.
- According to the invention, this object is achieved by virtue of the fact that each blade has the following combination of characteristics:
- the leading edge is curved backwardly and has a hyperbolic profile when viewed both from the front and from the side;
- the trailing edge is straight, and
- the angle of keying is a hyperbolic function of the radial co-ordinate of the blade. - The invention will now be described in detail with reference to the appended drawings, provided purely by way of non-limiting example, in which:
- Figure 1 is a schematic perspective view of an axial fan rotor according to the invention,
- Figure 2 is a view taken on the arrow II of Figure 1, on an enlarged scale,
- Figure 3 is a view taken on the arrow III of Figure 1, on an enlarged scale, and
- Figure 4 is a view taken on the arrow IV of Figure 1, on an enlarged scale.
- With reference to the drawings, an axial fan rotor for cooling the radiator of the cooling system of an internal combustion engine for motor vehicles is generally indicated 1.
- The rotor 1, which is conveniently made in one piece from moulded plastics material, comprises a
central hub 2 from which a circumferential ring of curvedradial blades 3 extends. According to the invention, eachblade 3 has a leadingedge 3a which, as can clearly be seen in Figures 3 and 4, is curved backwardly and has a hyperbolic profile when viewed both from the side (Figure 3) and from the front (Figure 4). Thetrailing edge 3b of eachblade 3 is straight. - Furthermore, the angle at which each blade is keyed to the
hub 2 varies hyperbolically in dependence on the radial co-ordinate of the blade. - By virtue of the above-described conformation, the fan according to the invention enables a better performance and quieter operation to be achieved in use, compared with conventional rotors.
Claims (1)
- An axial fan rotor for cooling the radiator of the cooling system of an internal combustion engine for motor vehicles, including a hub carrying a ring of radial blades, characterised in that each blade (3) has the following combination of characteristics:
- the leading edge (3a) is curved backwardly and has a hyperbolic profile when viewed both from the front and from the side;
- the trailing edge (3b) is straight, and
- the angle of keying is a hyperbolic function of the radial co-ordinate of the blade (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT5337287U IT210736Z2 (en) | 1987-06-03 | 1987-06-03 | AXIAL FAN IMPELLER FOR COOLING THE RADIATOR OF THE REFRIGERATION CIRCUIT OF AN INTERNAL COMBUSTION ENGINE FOR MOTOR VEHICLES |
IT5337287U | 1987-06-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0293825A1 true EP0293825A1 (en) | 1988-12-07 |
EP0293825B1 EP0293825B1 (en) | 1991-09-25 |
Family
ID=11282223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880108677 Expired EP0293825B1 (en) | 1987-06-03 | 1988-05-31 | Axial fan rotor for cooling the radiator of the cooling system of an internal combustion engine for motor vehicles |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0293825B1 (en) |
DE (1) | DE3865098D1 (en) |
ES (1) | ES2024590B3 (en) |
IT (1) | IT210736Z2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104005992A (en) * | 2013-02-22 | 2014-08-27 | 珠海格力电器股份有限公司 | Axial flow fan blade |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB388991A (en) * | 1932-07-09 | 1933-03-09 | Rene De Mey | Improvements in or relating to screw fan blades |
US2390879A (en) * | 1940-09-21 | 1945-12-11 | B F Sturtevant Co | Propeller fan |
DE2029021A1 (en) * | 1970-06-12 | 1971-12-16 | SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim | Low-noise impeller for a blower |
-
1987
- 1987-06-03 IT IT5337287U patent/IT210736Z2/en active
-
1988
- 1988-05-31 DE DE88108677T patent/DE3865098D1/en not_active Expired - Lifetime
- 1988-05-31 EP EP19880108677 patent/EP0293825B1/en not_active Expired
- 1988-05-31 ES ES88108677T patent/ES2024590B3/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB388991A (en) * | 1932-07-09 | 1933-03-09 | Rene De Mey | Improvements in or relating to screw fan blades |
US2390879A (en) * | 1940-09-21 | 1945-12-11 | B F Sturtevant Co | Propeller fan |
DE2029021A1 (en) * | 1970-06-12 | 1971-12-16 | SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim | Low-noise impeller for a blower |
Also Published As
Publication number | Publication date |
---|---|
IT8753372V0 (en) | 1987-06-03 |
IT210736Z2 (en) | 1989-01-11 |
ES2024590B3 (en) | 1992-03-01 |
EP0293825B1 (en) | 1991-09-25 |
DE3865098D1 (en) | 1991-10-31 |
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