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EP1801422A2 - Ventilateur et aube de ventilateur - Google Patents

Ventilateur et aube de ventilateur Download PDF

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Publication number
EP1801422A2
EP1801422A2 EP06003819A EP06003819A EP1801422A2 EP 1801422 A2 EP1801422 A2 EP 1801422A2 EP 06003819 A EP06003819 A EP 06003819A EP 06003819 A EP06003819 A EP 06003819A EP 1801422 A2 EP1801422 A2 EP 1801422A2
Authority
EP
European Patent Office
Prior art keywords
fan
edge
fan blade
wing
outer edge
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
EP06003819A
Other languages
German (de)
English (en)
Other versions
EP1801422A3 (fr
EP1801422B1 (fr
Inventor
Ralf Neumeier
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.)
Ziehl Abegg SE
Original Assignee
Ziehl Abegg SE
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
Priority claimed from EP05028264A external-priority patent/EP1801421A1/fr
Application filed by Ziehl Abegg SE filed Critical Ziehl Abegg SE
Priority to EP06003819.7A priority Critical patent/EP1801422B1/fr
Priority to US11/614,598 priority patent/US20070201982A1/en
Publication of EP1801422A2 publication Critical patent/EP1801422A2/fr
Publication of EP1801422A3 publication Critical patent/EP1801422A3/fr
Application granted granted Critical
Publication of EP1801422B1 publication Critical patent/EP1801422B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/26—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
    • 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
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/10—Two-dimensional
    • F05D2250/18—Two-dimensional patterned
    • F05D2250/183—Two-dimensional patterned zigzag

Definitions

  • the invention relates to a fan and a fan blade.
  • fluidically shaped fan blades provide high performance, e.g. with regard to the achieved flow-through volume or the discharge pressure.
  • a problem is often a strong noise during operation of the fan.
  • the DE 199 480 75 used to reduce the running noise an axial fan with wings having an S-shaped, leading edge of the wing with a protruding outer corner.
  • the EP 887 558 B1 proposes fan blades with an S-shaped leading edge and a trailing edge mirrored to the leading edge.
  • the US 3 416 725 shows a wing shape with a double-angled leading edge and a slightly simply sickled trailing edge.
  • the DE 103 26 637 B3 describes a fan with alternating direction of rotation, which has wings with S-shaped, outwardly strongly receding leading edge.
  • the WO 1998005868 discloses a numerical method for aeroacoustic optimization of an axial fan or its blade geometry.
  • the US 2,649,921 provides a fan with very short and wide blades and triple-curved inflow and outflow edges.
  • the FR 27 280 28 represents wings with convex edge areas with large winglets.
  • the invention deals with the problem of providing a low-noise fan or fan blades.
  • the invention solves this problem with a fan or a fan blade according to the independent claims.
  • the dependent claims contain advantageous embodiments.
  • a fan with usually a plurality of star blades arranged on a hub by means of fastening devices (a fan according to the invention uses fan blades according to the invention, as described below) for moving the material surrounding the fan, such as air or another gas or else a liquid.
  • the hub forms the center of the fan.
  • a radial jet is defined which extends as a straight line from the center of the hub centrally through the respective blade root of the fan blade to the outside.
  • Each fan blade has a leading edge which, in operation, advances in the normal direction of travel and a trailing edge which lags in operation in the normal direction of travel.
  • an operation of the device described in the opposite direction is possible. Nevertheless, the inflow and outflow are usually optimally shaped only for one direction; operating in the opposite direction can not deliver optimal performance.
  • “Inside” is the hub for a ventilator described, “out” the housing or the shaft (if any, which is usually the case).
  • the outer edge of the fan blade is therefore the edge furthest away from the hub; it is often shorter than the inflow and outflow edges.
  • the fan blade sheet has a suction side, which sucks the incoming air, etc., during operation, and an opposite pressure side, on which the pressure for ejecting the air, etc. builds up.
  • a fan according to the invention uses at least one fan blade according to the invention, which it arranges around a hub (in the case of several fan blades, preferably at equal intervals).
  • the fan comprises corresponding fastening devices;
  • a device on the hub receives a counterpart attached to the wing.
  • the fan has a controllable motor, which provides for its operation, ie the rotation of the at least one fan blade about an imaginary axis through the center of the hub.
  • the fan is in a shaft or housing.
  • the at least one fan blade according to the invention used by a fan according to the invention, achieves a reduced noise during operation due to a special edge shape, compared with comparable conventional fans.
  • the leading edge of a wing according to the invention in the vane blade plane S-shaped has So two sheets with a turning point on.
  • the reversal point is preferably located approximately in the middle of the leading edge; the arc lying outwardly from the turning point preferably bulges concavely into the wing surface, ie in the direction of the radial jet, while the arc lying inwardly from the turning point preferably convexly bulges away from the radial jet.
  • the term "in the blade plane” is intended merely to clarify that the S-shape of the leading edge causes a bulge in the wing surface in and out of her and not about a vertical curvature. It should be noted, however, that in most embodiments the individual points of the leaflet do not lie in one plane in the geometric sense; also the individual points of the leading edge are usually not on a straight line. In this respect, strictly geometrically speaking, a "leaf-blade plane" is present in the rarest cases.
  • a fan according to the invention avoids certain limitations that may arise due to a curved edge shape of the fan blades.
  • fans are attempted to minimize the flow of air from the pressure side to the suction side of the fan blades over their outer edges.
  • preferably only the narrowest possible gap between the outer edge of a fan blade and a housing is preferably provided.
  • the adaptation usually takes place before the fan is put into operation, if the performance profile of the system is adapted to the specific application.
  • the fan is equipped with a control unit and sensors or an operator display as well as actuators. Then, the control unit, for example, depending on the sensor signals or operator inputs with the help of the actuators constantly set an optimal angle of attack.
  • center point refers to the intersection of two outer-edge lines on the outer edge.
  • One of these lines is defined as extending from the leading edge of the outer edge (ie where the leading and trailing edges meet) to the trailing edge (where the outer and trailing edge meet), at the same distance at each point adheres to the one long side edge of the outer edge (where the suction side or pressure side of the blade and the outer edge meet) as to the other.
  • the other line is defined as connecting the middle of the long side edges of the outer edge, also at each point midway between the inflow and outflow ends.
  • the maximum allowable distance of the center from the radial beam depends in particular on the range of rotation of the angle of attack to be achieved and the tolerable gap width between outer edge and inner wall of the housing. Usually, a smaller distance to the center is permissible in the longitudinal direction of the outer edge than in the direction perpendicular thereto. Ideally, the intersection of the radial with the outer edge is as close as possible to the midpoint.
  • a fan according to the invention therefore combines the advantage of noise reduction with the advantage of variable adjustability.
  • Some embodiments of the fan blade achieve additional noise reduction by an at least partially fringed trailing edge.
  • a non-negligible proportion of the noise emission in fan operation is produced regularly by an interaction of the trailing edge with a turbulent boundary layer extending at the surface
  • the trailing edge scatters and diffracts the flow passing over it, producing sound.
  • the fringes of the trailing edge break up the eddies swept over the trailing edge, so to speak, and thus ensure a significant reduction in noise.
  • for a wing with a fringed trailing edge up to 3 dB lower noise was measured than for an identical except for the shape of the trailing edge with the first wing wings.
  • the fringe shape of the trailing edge between two and several dozen up to several hundred fringes.
  • the fringes are serrated and comprise two edges which converge in a point.
  • the inner edge is approximately perpendicular to the radial beam.
  • the inner edge deviates from the vertical, for example, it falls inwards relative to the Lot on the radial jet.
  • the outer edge is perpendicular to the radial jet or falls outward relative to the solder.
  • the two edges enclose an angle between 10 and 80 degrees. In most cases, the tip formed by the edges is rounded.
  • the fringes have an ellipsoidal, circular, or sinusoidal contour.
  • the individual fringes of the trailing edge are formed differently.
  • the tips located inwardly are slightly inward, while the tips located farther outward point in a direction perpendicular to the radial jet or directed outward.
  • the size of the individual fringes depends on the flow velocity of the fluid and / or a limit frequency to be preset, above which the noise reduction is to be achieved.
  • the inflow velocity for individual points on the trailing edge of the fan blade is determined inter alia by their distances from the hub and the rotational speed calculated from the fan or determined by measurements with comparable blades (with or without fringed trailing edge). As the flow velocity for out-of-flow points increases toward the outside, the fringes also become larger toward the outside. For this embodiment, particularly good results can be demonstrated in experiments.
  • an inflow velocity is determined for the location of each individual fringe, for example by determining the average of several inflow velocities determined for different points of a fringe.
  • fringe size is determined.
  • the dependence of the fringe size on the flow velocity for each fringe or groups of fringes may be different. Fringes of the same fringe group can also have the same fringe size, with then adjacent fringe groups having significantly different fringe sizes.
  • Other designs include fringes whose size does not depend on the flow velocity and / or the cutoff frequency. For example, shorter and longer fringes alternate along the trailing edge.
  • a trailing edge is defined without a fringe shape.
  • the fringes are quasi placed on this trailing edge without fringe shape or at least extend beyond them and thus widen the wing; in other embodiments, the fringes add nothing to the width of the wing, but rather wing material is removed as compared to the fringed wing to form the fringes.
  • the trailing edge without fringe shape defines the location of the peaks. Often, a portion of the trailing edge near the inner and / or outer edge is not fringed. The outer and inner edge is thus not shortened compared to the wing without fringe shape. Other embodiments have no such sections and may thereby shorten the outer and / or inner edge. In addition, there are embodiments with non-fringed sections in the middle or at other locations of the trailing edge.
  • one of the transitions of the fringe edges to the pressure and the suction side is rounded and the other sharp-edged.
  • the trailing edge with or without fringes is fluidically adapted to the S-shaped leading edge and the specified position of the outer edge.
  • the trailing edge also forms at least one sheet in the "sheet plane", but in most embodiments, two or three sheets, but often only one arc is curved in a similar strong manner as in the leading edge.
  • the highly developed arc lies in the outer third of the trailing edge and has a curvature parallel to the outer arc of the leading edge.
  • the inner half of the trailing edge are, for example, two flat arches with a reversal point. The second arc then goes over very flat and with another reversal point in the outer, parallel to the leading edge arc.
  • the widest point of the fan blade so the point at which the inflow and outflow edge are furthest apart, in its inner fifth.
  • the innermost point of the leading and trailing edge marks the widest point.
  • the outer edge represents the narrowest point of the wing.
  • the inventive S-shape of the leading edge influences the flow during fan operation: for example, the radial velocities and thus the distribution of wing loading along the radius change, etc.
  • a special structure of the fan blade in which the fan blade along of the radial jet has a longitudinal curvature.
  • the wing thus bulges convexly on its suction side, concave on the pressure side.
  • This longitudinal curvature is usually particularly pronounced in the outer half of the wing.
  • usually a further transverse curvature is over the width of the wing available, so that the individual points of the inner and outer edge (viewed from inside or outside) are not on a straight line.
  • the wing area in the vicinity of the leading edge over its entire length of the sucked air is curved away, so that the inner and outer edge in the direction of its inflow end have such a transverse curvature.
  • the transverse curvature can vary in size along the wing.
  • the outer edge is preferably conformed to the shape of the mostly round shaft or housing around the fan (if it is in one) by having approximately the same curvature as the inner wall of the housing. If one looks at the outer edge from the outside in the direction of the radial jet, it usually has a "wing shape": their front, the leading edge and the rear end meet the trailing edge preferably have a rounded shape between the suction and the pressure side, wherein the Radius of the rounding at the front of the upstream end is greater than the rear outflow end. From the inflow end in the direction of the outflow end, the outer edge width in the region of the first third of the outer edge first increases and then decreases more slowly.
  • the increase in the outer edge width is achieved mainly by the bulging of a (mostly the striking with the suction side of the fan blade) long side edge of the outer edge.
  • This wing shape with convex curvature enhances the speed difference between the suction and pressure sides and the extent of the air deflection.
  • the profiles of parallel to the outer edge of the wing sections have a wing shape.
  • a crosspiece or winglet is mounted over the entire length of the outer edge or even beyond it.
  • a crosspiece helps to reduce or eliminate air vortices that often form at the end of the wing. It is preferably perpendicular to the radial jet on both sides, the two angles to the wing surface depending on their curvature along the radial jet often differ considerably from 90 °, but together give approximately 180 °.
  • Another embodiment provides an obliquely outward and the sucked air opposing crosspiece.
  • the crosspiece doubles or triples - as viewed from the outside - the width of the outer edge.
  • the crosspiece is usually the same distance in both directions beyond the width of the outer edge.
  • the width changes from one vertex of the outer edge to the other, with an increase up to the middle of the outer edge and then a decrease in the width.
  • the smallest width of the cross piece is present, which, however, usually exceeds the width of the outer edge.
  • Another embodiment does not provide for exceeding the width of the outer edge at its ends.
  • the variants with decreasing width of the cross piece to the ends of the outer edge prove to be particularly favorable for the allowable adjustment of the angle of attack.
  • a fan blade measures 1.5 to 4 times its maximum width in length.
  • the width varies considerably in some embodiments; For example, the width differs by a factor of 2 at different positions of the wing.
  • the absolute wing size is scaled depending on the desired delivery volume.
  • FIG. 1 shows the pressure side of an embodiment of a fan 9.
  • the fan 9 has four star-shaped arranged around the hub 7 fan blades 1, of which according to the viewing direction in each case the pressure side can be seen.
  • the wing feet 5 of the fan blades 1 For attachment to the hub mounted fasteners 8, the wing feet 5 of the fan blades 1 on.
  • the wing feet 5 are placed in the fasteners 8 and then rotated by the radial until they have reached the desired rotational position.
  • the fixing in the selected position for example, by screws, clamps such as springs or by between fan blade 5 and fastening device 8 inserted, adjustable or adapted spacers (which are not shown) reached.
  • the (sometimes considerable) centrifugal forces are to be considered, which act on the fan blades 1 during operation.
  • the motor which sets the fan 9 in a rotational movement about an axis projecting through the center N of the hub 7 from the image plane axis.
  • the normal direction of movement of the fan 9 indicates arrow B.
  • the shape of the wings 1 is optimized. However, if necessary, a movement in the other direction is possible.
  • a fan 9 may comprise any other even or odd number of fan blades 1, which are usually arranged at the same distance from each other.
  • the housing of the fan 9 is not shown.
  • a gap measuring, for example, six parts per thousand of the fan outside diameter.
  • the angle of attack of the wing 1 of the fan 9 shown by about 10 to 12 degrees adjustable.
  • the leading edge 2 shows the pressure side of a true-to-scale embodiment of a fan blade 1.
  • the leading edge 2, which voraneilt in operation, has a flat S-shape, with the turning point seen from the inside is not quite in the middle of the leading edge 2.
  • the trailing edge 3 is curved. In the outer third, it runs parallel to the leading edge 3; in the two inner thirds it shows two small, hardly pronounced bends with two reversal points.
  • the corners of the inner edge 6 are opposite to the other Edge points slightly pulled down, so that the inner edge 6 describes a total in the picture downwardly open curvature, which interrupts the wing base 5 in the middle.
  • the blade root 5 is designed to connect the fan blade 1 to the fastening device 8 (see FIG. 1) attached to the hub 7 and to set the desired angle of attack.
  • the radial jets x of the individual wings 1 extend from the center of the hub N of the fan 9 centrally through the wing base 5 of the respective wing 1 star-shaped outward.
  • the center M of the outer edge 4 of the fan blade 1 falls on the radial beam x as a rotation axis for the wing adjustment.
  • the ends of the outer edge 4 move in rotation about the rotation axis x on a circle with the distance of the end of the center M as a radius.
  • the outer edge 4 also has a slight curvature so that it conforms to the shape of the housing (not shown).
  • the length of the fan blade 1 shown in Figure 2 is without the blade base 5, for example, 13 cm.
  • the width of the fan blade decreases on the whole from the inside to the outer edge 4 to the outside.
  • the widest wing point is not at the innermost point, but slightly shifted outwards; it measures about 7 cm.
  • the wing 1 has a width of about 5.5 cm.
  • the ratio of the length of the fan blade 1 moves to its width in the order of 1.8 to 2.4.
  • the ratio of the wing length for wing width for the entire wing or in places smaller than 1, for example, then the outer edge 4 is longer than the leading edge 2 and the trailing edge.
  • Figure 3 illustrates a further embodiment of a fan blade 1 according to the invention in a side view of the trailing edge 3; in the picture, the suction side of the wing 1 is right.
  • the curvature of the wing 1 along the radial beam x is clearly visible: the suction side of the wing bulges convex, the opposite pressure side concave.
  • the inner edge 6 is significantly curved in comparison to the outer edge 4 of the sucked air.
  • the wing 1 shown also has a crosspiece (winglet) 10. It is placed on the outer edge 4 and is equal to the suction and the pressure side beyond this.
  • the angle between the protruding to the pressure side crosspiece part and the blade is significantly more than 90 ° due to the wing curvature, while the angle between the protruding to the suction side crosspiece part and the blade is significantly lower.
  • FIG. 4 shows the suction side of a further embodiment of a fan blade 1 from a slightly lateral perspective. Also, this wing 1 has a crosspiece 10, which - as can be seen here - terminates with the length of the outer edge 4 and does not protrude beyond this. In this figure, a slot 11 is shown on the leading edge 2, which serves as a recording for balancing weights when needed.
  • Figure 5 presents a section of the wing 1 of Figure 4 along the axis A-A.
  • the material thickness remains approximately constant in this embodiment over most of the wing length. Only in the outer third does it decrease significantly, since there lower forces act as in the inner wing part. Preferably, the material thickness compared to other, parallel to the section shown sectional profiles not constant.
  • FIG. 6 which shows a wing 1 seen from the hub to the outside, once again illustrates the complex structure of the wing 1. Not only does the leading edge 2 an S-shape, but the wing 1 is also in the direction of the radial jet x curved inside out. Furthermore, the wing 1 also shows a curvature over its width, as can be seen on the inner edge 6. The end of the inner edge 6, which meets the trailing edge 3, projects slightly in this embodiment.
  • the crosspiece 10 extends over the entire length of the outer edge 4, but closes off with the leading edge 2 and is not beyond this. In order to create a fluidically favorable conclusion, the width of the cross piece 10 is slow back to the width of the leading edge. At the location of its protruding width, the crosspiece 10 multiplies the width of the outer edge, for example by a factor of 3. In the embodiment shown, the crosspiece part protruding toward the suction side is wider than the transverse piece part projecting towards the pressure side.
  • the blade base 5 in this embodiment has a partially perforated circular ring on which, for example, a matching (not shown) adapter can be placed.
  • a fastening device 8 on the hub 7 in turn receives the intermediate piece and thus ensures a firm hold of the wing 1.
  • the choice or setting of the intermediate piece specifies the angle of attack of the wing 1.
  • Figure 7 shows the suction side of another embodiment of a fan blade.
  • the curvature of the wing 1 along the radial ray x is clearly visible, which is convex visible on the suction side.
  • This embodiment also has a wing base 5 described with reference to FIG. 6 and a crosspiece 10.
  • FIG. 8 shows the outer edge 4 of an embodiment of a fan blade 1.
  • the wing shape of the outer edge 4 can be seen from this viewing direction.
  • the inflow end 15 of the outer edge, at which the leading edge meets the outer edge, as well as the opposite outflow end 16 has a rounded shape.
  • the suction side of the wing 1 and the outer edge 4 meet at the side edge 17, the pressure side and the outer edge 4.
  • the wing shape of the outer edge 4 is the side edge 18 is longer than the side edge 17. Due to the longer travel along the side edge 18, in the fan mode, air flowing along the side edge 18 must flow faster than air flowing along the shorter side edge 17. This forms a negative pressure or suction on the suction side of the wing 1, which sucks air from the environment of the fan 9, and pressure on the pressure side, which distributes the air away from the fan 9.
  • FIG. 9 shows an embodiment of a ventilator blade 1 whose outflow edge 3 is fringed.
  • Two portions of the trailing edge 3 in the vicinity of the outer edge 4 and the inner edge 6 are not fringed, so that the outer and inner edges are not shortened compared to a wing without fringe shape.
  • the trailing edge 3 has twenty-three differently sized serrated fringes 25, each comprising an inner edge 23, an outer edge 21 and a tip 22. From the inside to the outside, the innermost four, the following seven, the next six and the following six fringes 25 each form groups with equal fringes. The fringe size of a group increases from the innermost to the outermost group.
  • f is a cutoff frequency above which the noise reduction occurs. It can be specified by the operator (taking into account other design parameters).
  • w ⁇ is the inflow velocity, which is individually calculated for each fringe 25 in this embodiment. It depends inter alia on the distance of the fringe from the hub and the rotational speed of the fan.
  • the fringes differ from inside to outside. While the inner edges 23 of the inner and outer fringes 25 point slightly inward with respect to the solder y on the radial ray x, the inner edge 23 of the central fringes 25 is at right angles to the radial ray x, such as the plotted lot y makes clear on the radial ray x. In this case, the inboard edge 23 forms an angle of approximately 45 degrees with the outboard edge 21. This angle decreases continuously in the more outward and inward fringes 25.
  • All tips 22 are located on an imaginary unrestrained trailing edge, which is shown in Figure 9 by a dashed line 24.
  • the embodiment shown has material recesses relative to an unfrozen wing.
  • the non-continuous trailing edge 24 also has a favorable shape in terms of flow mechanics.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP06003819.7A 2005-12-22 2006-02-24 Ventilateur et aube de ventilateur Active EP1801422B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06003819.7A EP1801422B1 (fr) 2005-12-22 2006-02-24 Ventilateur et aube de ventilateur
US11/614,598 US20070201982A1 (en) 2005-12-22 2006-12-21 Ventilator and ventilator blade

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05028264A EP1801421A1 (fr) 2005-12-22 2005-12-22 Ventilateur et pale de ventilateur
EP06003819.7A EP1801422B1 (fr) 2005-12-22 2006-02-24 Ventilateur et aube de ventilateur

Publications (3)

Publication Number Publication Date
EP1801422A2 true EP1801422A2 (fr) 2007-06-27
EP1801422A3 EP1801422A3 (fr) 2009-10-14
EP1801422B1 EP1801422B1 (fr) 2013-06-12

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EP06003819.7A Active EP1801422B1 (fr) 2005-12-22 2006-02-24 Ventilateur et aube de ventilateur

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US (1) US20070201982A1 (fr)
EP (1) EP1801422B1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009054815A1 (fr) * 2007-10-24 2009-04-30 Hidria Rotomatika D.O.O. Pale de soufflante axiale à surfaces ondulées de pression et de succion
DE102009035689A1 (de) * 2009-07-30 2011-02-03 Eads Deutschland Gmbh Fluiddynamisch wirksamer Rotor
WO2013131641A3 (fr) * 2012-03-06 2013-12-12 Ziehl-Abegg Ag Ventilateur axial
CN109424582A (zh) * 2017-09-05 2019-03-05 博泽沃尔兹堡汽车零部件有限公司 风扇叶轮
EP3655664A1 (fr) * 2017-07-18 2020-05-27 Ziehl-Abegg SE Pale pour rotor de ventilateur, rotor et ventilateur axial, ventilateur diagonal ou ventilateur radial
DE102021105225A1 (de) 2020-03-10 2021-09-16 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator und Ventilatorflügel
US11746796B1 (en) 2022-11-10 2023-09-05 SmithGroup Companies, Inc. Plenum fan with telescoping blades
EP4283135A1 (fr) 2022-05-24 2023-11-29 ebm-papst Mulfingen GmbH & Co. KG Dispositif de guidage et ventilateur doté d'un dispositif de guidage
DE102022113142A1 (de) 2022-05-24 2023-11-30 Ebm-Papst Mulfingen Gmbh & Co. Kg Nachleiteinrichtung sowie Ventilator mit Nachleiteinrichtung
DE102022113141A1 (de) 2022-05-24 2023-11-30 Ebm-Papst Mulfingen Gmbh & Co. Kg Nachleiteinrichtung sowie Ventilator mit Nachleiteinrichtung

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EP3655664A1 (fr) * 2017-07-18 2020-05-27 Ziehl-Abegg SE Pale pour rotor de ventilateur, rotor et ventilateur axial, ventilateur diagonal ou ventilateur radial
EP3655664B1 (fr) * 2017-07-18 2025-12-24 Ziehl-Abegg SE Pale pour rotor de ventilateur, rotor et ventilateur axial, ventilateur diagonal ou ventilateur radial
CN109424582A (zh) * 2017-09-05 2019-03-05 博泽沃尔兹堡汽车零部件有限公司 风扇叶轮
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WO2021180559A1 (fr) 2020-03-10 2021-09-16 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilateur et pales de ventilateur
WO2021180560A1 (fr) 2020-03-10 2021-09-16 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilateur et aubes de ventilateur
EP4083433A1 (fr) 2020-03-10 2022-11-02 ebm-papst Mulfingen GmbH & Co. KG Ventilateur et aubes de ventilateur
EP4083432A1 (fr) 2020-03-10 2022-11-02 ebm-papst Mulfingen GmbH & Co. KG Ventilateur et aubes de ventilateur
US11965521B2 (en) 2020-03-10 2024-04-23 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan and fan blades
US11988224B2 (en) 2020-03-10 2024-05-21 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan and fan blades
DE102021105225A1 (de) 2020-03-10 2021-09-16 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator und Ventilatorflügel
EP4283135A1 (fr) 2022-05-24 2023-11-29 ebm-papst Mulfingen GmbH & Co. KG Dispositif de guidage et ventilateur doté d'un dispositif de guidage
DE102022113142A1 (de) 2022-05-24 2023-11-30 Ebm-Papst Mulfingen Gmbh & Co. Kg Nachleiteinrichtung sowie Ventilator mit Nachleiteinrichtung
DE102022113141A1 (de) 2022-05-24 2023-11-30 Ebm-Papst Mulfingen Gmbh & Co. Kg Nachleiteinrichtung sowie Ventilator mit Nachleiteinrichtung
US11746796B1 (en) 2022-11-10 2023-09-05 SmithGroup Companies, Inc. Plenum fan with telescoping blades

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