EP2622226A1 - Propeller for ventilator, with a variable blade angle - Google Patents
Propeller for ventilator, with a variable blade angleInfo
- Publication number
- EP2622226A1 EP2622226A1 EP11749125.8A EP11749125A EP2622226A1 EP 2622226 A1 EP2622226 A1 EP 2622226A1 EP 11749125 A EP11749125 A EP 11749125A EP 2622226 A1 EP2622226 A1 EP 2622226A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- rope
- length
- head
- blade
- 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
- 230000007423 decrease Effects 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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 invention relates to a fan hinge comprising a hub and blades extending radially outwardly from the hub.
- Such propellers are used in particular for cooling the drive motor of motor vehicles, the propeller producing a flow of air through a heat exchanger.
- the hub of the propeller also called “bowl”
- the hub of the propeller is adapted to be wedged on the shaft of a motor, which can be an electric motor driven by a control electronics.
- the blades are made, in a known manner, with a wedging angle which increases with the radius.
- Stalling is defined by the angle between the chord and the axis of rotation, where the chord is defined as the straight segment connecting the leading edge and the trailing edge of the payroll on the flattened cross-section.
- Propellers are typically known having a pitch angle of 65 ° in the foot and increasing up to 75 ° at the head.
- the invention aims to provide such a propeller whose shape allows to limit the secondary flows at the head and foot of the pay but also generally on the entire span of the blade.
- the invention proposes a fan propeller, in particular for cooling the drive motor of a motor vehicle, comprising a hub, a shell and blades extending radially between the hub and the shell, each blade having a foot at its junction with the hub and a head at the junction with the ferrule, each blade having a leading edge and a trailing edge between which, at each flattened cross section, is defined a rope.
- the wedging angle between the rope and the axis of rotation of the helix varies and that the variation of the wedging angle between the foot and the party has a point of inflection between a first landing and a second landing.
- the disturbances induced by the bowl and the ferrule are taken into account for the secondary flows and are limited to the foot and the level of the head and on all the span of the pay the secondary flows.
- the pitch angle increases abruptly with the radius to the first bearing and the pitch angle increases again with the radius between the first bearing and the second bearing.
- the wedge angle decreases abruptly between the second bearing and the head.
- the pitch angle decreases abruptly with the radius to the first bearing and the pitch angle decreases again with the radius between the first bearing and the second bearing.
- the length of the rope varies and that the variation of the rope length between the foot and the head has a point of inflection between two bearings.
- the variation of the string length has three levels with a point of inflection between two consecutive levels.
- the length of the chord decreases with the radius to a first level, the chord length increases with the radius to a second level, and the chord length decreases again with the radius to a second third tier.
- the rope length increases abruptly between the third landing and the payroll head.
- the length of the rope increases with the radius to a first step, the length of rope decreases with the radius to a second level and the length of rope increases again with the radius up to a third landing.
- At least one of the leading edge and the trailing edge has a concave undulation and is prolonged by a convex undulation;
- the convex undulation is disposed between two concave undulations; and / or the concave corrugation is disposed between two convex corrugations; and or each blade has a face extending between the leading edge and the trailing edge, which has a recess and which is extended by a bump; and or
- Figure 1 is a front view of a propeller of the prior art
- Figure 2 is a partial sectional view of the helix of Figure 1 with a blade cut in a cross section;
- Figure 3 is a sectional view of the pay of the propeller of Figure 2 according to the flattened cross section;
- Figure 4 is a perspective view of the front face of a propeller according to the invention.
- FIG. 5 is a perspective view of the rear face of the helix of FIG.
- Figures 6, 7 and 8 are perspective views from three different angles of a pay according to the invention.
- Figures 9 and 10 are graphs showing curves respectively representing the variation of the setting and the variation of the length of the rope as a function of the distance to the foot of the blade;
- FIGs 1 1 and 12 are graphs similar to those of Figures 8 and 9 for a blade variant.
- the propeller 1 shown in the figures conventionally comprises a plurality of blades 2 extending generally radially from the central hub 3 and connected together, at the periphery of the propeller 1, by a ferrule 4.
- the hub 3 , the blades 2 and the shell 4 are formed of a piece by molding plastic material.
- the hub 3 has a cylindrical annular wall of revolution 5, to which the feet 6 of blades 2 are connected, and a flat front wall 7, facing upstream.
- the terms upstream and downstream here refer to the direction of the air flow produced by the rotation of the helix 1.
- the front walls 7 and annular 5 are interconnected by a rounded profile in an arc.
- the front wall 7 is connected to a central sleeve molded onto a metal annular insert 8 for the connection of the propeller 1 to the shaft of a drive motor not represent.
- Reinforcing ribs are provided inside the hub 3.
- the shell 4 also has a cylindrical annular wall of revolution 10, which is connected to the heads 1 1 at the ends of the blades 2, and which is extended, on the upstream side, by a rounded flare.
- a cylindrical annular wall of revolution 10 is connected to the heads 1 1 at the ends of the blades 2, and which is extended, on the upstream side, by a rounded flare.
- the expression "flattened transverse section 13" is defined as the plane closed curve obtained by cutting the blade by a cylindrical surface of revolution about the axis of the helix 1, and by unrolling this cylindrical surface flat.
- the cross section 13 of the prior art, shown in FIGS. 2 and 3 has an aerodynamically profiled shape such as an airplane wing profile.
- the rope 15 is then defined as the straight segment connecting the leading edge 16 and the trailing edge 17 on the flattened cross section.
- Propeller 1 rotates in a direction defined by the direction "trailing edge to leading edge”.
- the wedging a, or wedging angle is defined by the angle that exists between the rope 15 and the axis of rotation 9. As seen in Figure 3, there is shown the angle of wedge a between the rope 15 and an axis 20 parallel to the axis of rotation 9 of the helix 1.
- the propeller 1 differs from the propeller of the prior art by the shape of the blades 2.
- the pay 2 of the helix 1 comprises seven identical blades 2 which extend from the hub 3 to the shell 4 and are evenly distributed angularly around the hub 3.
- Each blade 2 has an upstream face 22 and a downstream face 23, the upstream faces 22 being visible in FIG. 4 while the downstream faces 23 are visible in FIG. As the blades 2 are identical to each other, only one is described with reference to FIGS. 4 to 10.
- the shape of the blade 2 is obtained by varying the foot 6 to the head 1 1, the length of rope 15 on the one hand and the wedging angle a.
- the variation of the length of rope 15 has an effect on the width of the blade 2. It results in a presence of corrugations on the edge here of attack.
- the variation of the wedging has an effect on the relief of the blade 2 by creating bumps and hollows.
- the blade 2 has a leading edge 16 which undulates. Starting from the foot 6, the edge 16 begins with a corrugation or concave curve 25.
- the concave curve 25 is extended by a convex curve 26 which itself is prolonged by a concave curve 27.
- the curve 27 has its end opposite to the foot 6 at the level of the head 1 1 at the junction between the blade 2 and the ferrule 4.
- Three defined points 30, 31, 32 are defined on the leading edge 16 of the payroll 2.
- the point 30 is located near the foot 6.
- the point 31 is located in an area halfway between the payroll foot 6 and the head 11.
- the point 32 is located near the head 1 1.
- Point 30 is located on the top of the concave curve 25; point 31 is located on the top of curve 26; point 32 is located on the top of curve 27.
- the trailing edge 17 has a curve having a single concavity, flatter, that is to say, it has a large central bearing 28 approximately flat.
- FIG 10 shows the evolution of the length of the rope 15 relative to the span of the pay 2 that is to say with respect to the distance to the foot 6.
- L30, L31 and L32 which correspond to the distance of the points 30, 31 and 32 to the foot 6 of the blade 2.
- the graph shows that between the foot 6 and the point 30, that is to say the length L30, the length of the rope decreases. At this point it reaches a first minimum. And around this point 30, the evolution of the length of rope is on a bearing 33 where the length of rope hardly changes.
- the length does not change when the span of 10% span of the blade, the length of rope does not evolve more than 5%. According to a variant, it is possible to provide a bearing for which the rope evolution is not more than 3%.
- the rope length increases.
- This length of rope reaches a maximum at point 31, and around this point 31, the evolution of the length of rope is on a bearing 34 where the length of rope hardly changes, Between the two bearings 33, 34 and therefore between the minimum corresponding to the point 30 and the maximum corresponding to the point 31, the curve of the evolution of the string has a first point of inflection 36.
- the curve of the evolution of the rope has a second point of inflection 37.
- the length of the rope decreases abruptly.
- abruptly means that in absolute value, the slope is much greater on this segment than on a segment where the variation is not described as abrupt.
- the value of the wedging angle ⁇ varies between the foot 6 and the edge 1 1. This is reflected in particular by the presence of reliefs on the faces of the blade 12.
- the upstream face 22 of the blade 2 has on the side of the foot 6 a recess 40. In the middle of the face 22, the latter has a boss 41.
- the surface again has a recess 42 so that the face 22 has a boss 41 with on either side a recess 40, 42.
- the boss 41 and the recesses 40, 42 s extend approximately the entire width of the face 22 even if the peaks or minimums of these hollows or hump are not here on the edges 16, 17.
- FIG. 9 shows the evolution of the wedging angle ⁇ with respect to the span of the blade 12, that is to say with respect to the distance to the foot 6.
- FIG. 9 also reported L30, L31 and L32.
- the wedging has increased abruptly from the foot 6 over the entire length L30 and continues to increase sharply to a level 43 which is between the points 30 and 31.
- a level 43 which is between the points 30 and 31.
- the wedging a is maintained at a constant value and then increases again from the point 31.
- the increase continues and passes through an inflection point 45.
- the wedging has further increased to a second bearing 44.
- the second bearing 44 is located between the point 31 and the point 32, a little before point 32. After the bearing 44 and more clearly after point 32, the wedging has decreased sharply to the head 1 1.
- the calibration value a decreases to a minimum and then increases.
- the evolution of the length of rope is on a bearing 53 where the length of rope hardly changes.
- the length of rope increases. This length of rope reaches a maximum.
- the evolution of the length of rope is on a bearing 54 where the length of rope hardly changes.
- the curve of the evolution of the rope presents a first point of inflection 56.
- the curve of the evolution of the rope has a second point of inflection 57.
- the leading edge 16 ripples towards and away from the leading edge 17.
- the edge 16 starts with a ripple or convex curve.
- the convex curve is prolonged by a concave curve which itself is prolonged by a concave curve.
- the curve has its end opposite to the foot 6 at the level of the head 11 at the junction between the blade 2 and the wall 5 of the hub 3.
- the value of the wedging angle a varies between the foot 6 and the head 1 1. This is reflected in particular by the presence of relief on the faces of the blade 12, so although has not represented in perspective the blade 2 from which we drew the graphs of Figures 1 1 and 12, it has the side of the foot 6 a bump. In mid-span of face 22, it has a hollow. And on the side of the head 1 1, the surface again has a bump so that the face 22 has a hollow with on either side a bump. The hollow and the bumps extend approximately over the entire width of the face 22. The downstream face has opposite reliefs.
- FIG. 1 1 shows the evolution of the wedge angle a with respect to the span of the blade 12 that is to say with respect to the distance to the foot 6.
- the values L30, L31 and L32 have also been reported.
- Stalling has decreased abruptly from the foot 6 over the entire length L30 and continues to decrease sharply to a bearing 63 which is between the points 30 and 31.
- the wedging a is maintained at a constant value then decreases again from point 31.
- the decrease continues and passes through an inflection point 65.
- the stall has decreased further to a second level 64.
- the second level 64 is located between point 31 and point 32, just before point 32.
- the wedging has increased sharply to the head 1 1.
- Blades 2 are shown with wavy edges reflecting the variation of the string length. Within the scope of the invention, blades may be provided which do not have these corrugated edges but only the variations of the wedging angle.
- the trailing edge also has a profile with two concave curves surrounding a convex curve or inversely depending on the profile of the leading edge.
- the leading edge has or not an equivalent profile.
- the evolution of the wedging angle has only one point of inflection between two levels.
- only some blades are formed according to the invention while the other blades have a more conventional rope distribution or setting such as in Figure 1.
- paydays according to the invention are distributed angularly regularly or not.
- the variation of the wedging angle a between the foot and the head has two inflection points, one of the two points of inflection is disposed between a first bearing and a second bearing.
- each point of inflection being arranged between two consecutive levels.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11749125T PL2622226T3 (en) | 2010-09-29 | 2011-07-28 | Propeller for ventilator, with a variable blade angle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1057871A FR2965315B1 (en) | 2010-09-29 | 2010-09-29 | FAN PROPELLER WITH CALIBRATION ANGLE VARIE |
PCT/EP2011/063045 WO2012041564A1 (en) | 2010-09-29 | 2011-07-28 | Propeller for ventilator, with a variable blade angle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2622226A1 true EP2622226A1 (en) | 2013-08-07 |
EP2622226B1 EP2622226B1 (en) | 2020-03-25 |
Family
ID=43969391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11749125.8A Active EP2622226B1 (en) | 2010-09-29 | 2011-07-28 | Propeller for ventilator, with a variable blade angle |
Country Status (8)
Country | Link |
---|---|
US (1) | US9841032B2 (en) |
EP (1) | EP2622226B1 (en) |
JP (1) | JP6121329B2 (en) |
CN (1) | CN103328826B (en) |
ES (1) | ES2804273T3 (en) |
FR (1) | FR2965315B1 (en) |
PL (1) | PL2622226T3 (en) |
WO (1) | WO2012041564A1 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2965314B1 (en) * | 2010-09-29 | 2017-01-27 | Valeo Systemes Thermiques | FAN PROPELLER HAVING ROPE LENGTH VARIE |
TWD160897S (en) * | 2013-10-09 | 2014-06-01 | 訊凱國際股份有限公司 | Cooling fan (1) |
TWD160896S (en) * | 2013-10-09 | 2014-06-01 | 訊凱國際股份有限公司 | Cooling fan (2) |
US10093152B2 (en) | 2014-06-09 | 2018-10-09 | Dometic Sweden Ab | Shrouded roof vent for a vehicle |
FI126594B (en) * | 2014-11-06 | 2017-02-28 | Outotec Finland Oy | propeller |
FR3033845B1 (en) * | 2015-03-19 | 2018-04-27 | Valeo Systemes Thermiques | AERODYNAMICALLY AND ACOUSTICALLY ENHANCED AUTOMOBILE FAN |
US10400783B1 (en) * | 2015-07-01 | 2019-09-03 | Dometic Sweden Ab | Compact fan for a recreational vehicle |
USD787037S1 (en) | 2015-07-01 | 2017-05-16 | Dometic Sweden Ab | Fan |
USD849797S1 (en) * | 2015-12-01 | 2019-05-28 | Ge Global Sourcing Llc | Blower assembly |
JP1555680S (en) * | 2016-03-01 | 2016-08-08 | ||
TWD182168S (en) * | 2016-07-27 | 2017-04-01 | 鑫賀精密電子(東莞)有限公司; | fan |
USD832987S1 (en) | 2016-10-13 | 2018-11-06 | Dometic Sweden Ab | Roof fan shroud |
US11027595B2 (en) | 2016-10-13 | 2021-06-08 | Dometic Sweden Ab | Roof fan assembly |
GB2555429B (en) * | 2016-10-27 | 2020-04-01 | Ge Aviation Systems Llc | Propeller assembly |
US11085415B1 (en) * | 2017-12-22 | 2021-08-10 | Star Sailor Energy, Inc. | Wind generator system having a biomimetic aerodynamic element for use in improving the efficiency of the system |
EP3816454A4 (en) * | 2018-05-09 | 2022-01-26 | York Guangzhou Air Conditioning and Refrigeration Co., Ltd. | Blade and axial flow impeller using same |
DE202019100367U1 (en) * | 2019-01-23 | 2020-04-24 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Fan wheel of a motor vehicle |
US11187083B2 (en) | 2019-05-07 | 2021-11-30 | Carrier Corporation | HVAC fan |
CN113653671B (en) * | 2021-08-06 | 2024-04-05 | 佛山市南海九洲普惠风机有限公司 | Impeller and negative pressure fan |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US632740A (en) * | 1898-09-09 | 1899-09-12 | Emerson Electric Mfg Co | Ventilating-fan. |
US2160467A (en) * | 1937-09-22 | 1939-05-30 | Edgar T Ward | Propeller |
US4900229A (en) * | 1989-05-30 | 1990-02-13 | Siemens-Bendix Automotive Electronic Limited | Axial flow ring fan |
DE69328212T2 (en) * | 1992-05-15 | 2000-09-07 | Siemens Canada Ltd., Mississauga | Flat axial fan |
US5320493A (en) * | 1992-12-16 | 1994-06-14 | Industrial Technology Research Institute | Ultra-thin low noise axial flow fan for office automation machines |
US5906179A (en) * | 1997-06-27 | 1999-05-25 | Siemens Canada Limited | High efficiency, low solidity, low weight, axial flow fan |
US6065937A (en) * | 1998-02-03 | 2000-05-23 | Siemens Canada Limited | High efficiency, axial flow fan for use in an automotive cooling system |
US6368061B1 (en) * | 1999-11-30 | 2002-04-09 | Siemens Automotive, Inc. | High efficiency and low weight axial flow fan |
JP3978083B2 (en) * | 2001-06-12 | 2007-09-19 | 漢拏空調株式会社 | Axial fan |
KR100820857B1 (en) | 2003-03-05 | 2008-04-10 | 한라공조주식회사 | Axial Flow Fan |
KR100820856B1 (en) * | 2003-03-05 | 2008-04-11 | 한라공조주식회사 | Axial flow fan |
US6902377B2 (en) * | 2003-04-21 | 2005-06-07 | Intel Corporation | High performance axial fan |
KR101018925B1 (en) * | 2004-03-19 | 2011-03-02 | 한라공조주식회사 | Axial flow fan |
KR100663965B1 (en) * | 2005-09-27 | 2007-01-02 | 동양기전 주식회사 | Axial flow fan |
CN101331057A (en) * | 2005-12-29 | 2008-12-24 | 美蓓亚株式会社 | Fan blade with non-varying stagger and camber angles |
KR101328559B1 (en) * | 2006-02-03 | 2013-11-13 | 한라비스테온공조 주식회사 | Axial flow fan |
FR2965314B1 (en) * | 2010-09-29 | 2017-01-27 | Valeo Systemes Thermiques | FAN PROPELLER HAVING ROPE LENGTH VARIE |
-
2010
- 2010-09-29 FR FR1057871A patent/FR2965315B1/en not_active Expired - Fee Related
-
2011
- 2011-07-28 CN CN201180057286.1A patent/CN103328826B/en active Active
- 2011-07-28 PL PL11749125T patent/PL2622226T3/en unknown
- 2011-07-28 JP JP2013530644A patent/JP6121329B2/en active Active
- 2011-07-28 WO PCT/EP2011/063045 patent/WO2012041564A1/en active Application Filing
- 2011-07-28 EP EP11749125.8A patent/EP2622226B1/en active Active
- 2011-07-28 ES ES11749125T patent/ES2804273T3/en active Active
- 2011-07-28 US US13/876,874 patent/US9841032B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012041564A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2804273T3 (en) | 2021-02-05 |
US20130323062A1 (en) | 2013-12-05 |
WO2012041564A1 (en) | 2012-04-05 |
CN103328826A (en) | 2013-09-25 |
CN103328826B (en) | 2016-01-20 |
JP6121329B2 (en) | 2017-04-26 |
JP2013538975A (en) | 2013-10-17 |
US9841032B2 (en) | 2017-12-12 |
PL2622226T3 (en) | 2020-11-02 |
FR2965315B1 (en) | 2012-09-14 |
FR2965315A1 (en) | 2012-03-30 |
EP2622226B1 (en) | 2020-03-25 |
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