EP3561309B1 - Ventilateur, son procédé de fabrication et procédé de distribution d'un fluide - Google Patents

Ventilateur, son procédé de fabrication et procédé de distribution d'un fluide Download PDF

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Publication number
EP3561309B1
EP3561309B1 EP19181992.9A EP19181992A EP3561309B1 EP 3561309 B1 EP3561309 B1 EP 3561309B1 EP 19181992 A EP19181992 A EP 19181992A EP 3561309 B1 EP3561309 B1 EP 3561309B1
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EP
European Patent Office
Prior art keywords
fan
blades
rotating element
contour
fan blades
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.)
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Application number
EP19181992.9A
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German (de)
English (en)
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EP3561309A1 (fr
Inventor
Sebastian Wissmann
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.)
MDEXX GmbH
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Mdexx GmbH
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Publication date
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Priority to PL19181992T priority Critical patent/PL3561309T3/pl
Publication of EP3561309A1 publication Critical patent/EP3561309A1/fr
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Publication of EP3561309B1 publication Critical patent/EP3561309B1/fr
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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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • F05D2240/303—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 leading 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
    • 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

Definitions

  • Fan method for its construction and method for dispensing medium
  • the present invention relates to the field of sucking in gaseous medium and its pressurized discharge and in particular to the field of fans such as centrifugal fans, axial fans and diagonal fans.
  • U.S. 2,238,749 discloses a fan having a plurality of fan blades, in each of which different deformations or deformations are alternately provided with no deformations at the trailing edge in order to reduce noise.
  • a fan with a fan wheel which comprises suction blades extending in the radial and axial direction with a leading edge facing an axial inlet direction of the fan wheel, at least one suction blade having a swirl device for generating microturbulence in the area of its leading edge.
  • a fan wheel in a design as a radial or diagonal fan consisting of a cover disk with an inlet opening, a bottom disk and several fan blades distributed over the circumference of the inlet opening and around an axis of rotation as well as with blade channels formed in the circumferential direction between the adjacent fan blades, which lead radially or diagonally outward from the area of the inlet opening and form blow-out openings in the outer area, the blade channels being designed to be so large in terms of their effective flow cross-section that a turbulent flow with a Reynolds number significantly greater than 2300 is achieved during operation, and the cover disk and / or the bottom disk have / has a non-rotationally symmetrical geometry, the respective non-rotationally symmetrical geometry having a continuous, point-continuous course viewed in the axial or axially parallel direction.
  • US 2012/321495 A1 discloses a centrifugal fan in an electronic device cooling system with asymmetrical blade spacing with acceptable balance.
  • the asymmetrical blade spacing is determined according to a set of desired acoustic artifacts that are favorable and a balance similar to that for the same fan blade spacing.
  • the fan impeller may include sixty-one fan blades.
  • a starting point of the present invention is explained below with reference to an exemplary application of a radial fan for cooling converters by means of an air flow.
  • f D. n ⁇ z 60 describe, where f D is the fundamental frequency of the rotating sound, n is the speed and z is the number of blades.
  • a fan as defined in claim 1 is proposed according to first aspects.
  • a method for constructing a fan as defined in claim 8 is proposed according to second aspects.
  • the specifically provided asymmetry thus allows an improved noise behavior, which is due to the fact that the respective individual impulses of the individually designed blades differ from one another, so that the rotational sound occurring in known solutions is to a certain extent "smeared" in its frequency spectrum.
  • the asymmetry includes that when the rotating element is imagined to be rotated by one or two fractions of a full revolution corresponding to the number of blades, the rotating element is rotated with regard to at least one property of an blade that influences the operation of the respective blade a component of the fan has media impulse exerted, differs from the rotating element that is not rotated.
  • the design of the airfoil cannot be mapped onto itself by rotating one or two angular sections between two adjacent airfoils.
  • an image on itself results for every (imaginary) rotation of 60 °.
  • only one full (imaginary) revolution preferably results in the rotating element being mapped onto itself.
  • the property that has an influence on a media pulse exerted by the respective blade during operation on a component of the fan includes a contour and / or inclination of a trailing edge of the blade, and an offset of an arrangement of the blade with respect to a rotational symmetry of the rotating element given output arrangement, the rotational symmetry corresponding to a number of blades of the rotating element.
  • the property which has an influence on a media pulse exerted by the respective blade during operation on a component of the fan includes, a contour and / or inclination of a leading edge of the airfoil, and / or a surface contour of the airfoil.
  • the surface contours of an airfoil are already modified in known solutions with respect to a comparatively simply curved surface.
  • all of the airfoils are modified in the same way, for example by providing depressions, raised areas, deviations in curvature and the like.
  • this deviation can also consist in the fact that one of the blades has a well-known surface contour without modification, while the other blade or blades have modified surface contours have, as consist in the fact that the affected blades each have their own, differing modifications.
  • the outflow edges are arranged parallel to the axis of rotation.
  • An inclined position of the discharge cross section results in a delay in the angle of impact the current.
  • the inclination - with a modified contour of the edge, possibly averaged over the extension of the edge - is preferably in a range from 5 ° to 15 °, particularly preferably in a range from 8 ° to 12 °.
  • the airfoil can also be differentiated in the leading edge.
  • the property that has an influence on a media pulse exerted by the respective blade during operation on a component of the fan comprises the contour of the trailing edge of the blade, with the at least two blades differing in terms of a deviation in the contour of their respective Differentiate the trailing edge from a given exit trailing contour.
  • exit outflow contour i.e. as a reference for quantifying a deviation or differentiation between blades
  • a linear edge with a straight course parallel to the axis of rotation can be assumed in a radial fan, possibly also an inclined linear edge.
  • the exit outflow contour only serves as a benchmark, without such an exit outflow contour having to have been present, for example, during the manufacture of the airfoil.
  • the initial contour is, however, not limited to a linear shape, in particular in view of the blade-blade contours that predominate in the respective fan designs.
  • the property that has an influence on a media pulse exerted by the respective blade during operation on a component of the fan comprises the contour of the leading edge of the blade, with the at least two blades differing in terms of a deviation in their contour differentiate the respective leading edge from a given exit entry contour.
  • the deviation of the contour of the trailing edge and / or the leading edge of at least one airfoil from the exit trailing contour or the exit inflow contour varies over the extension the trailing edge or the leading edge, a maximum deviation in one direction being at least 1/150 of the airfoil length and a maximum deviation in a direction opposite to the direction being at least 1/150 of the airfoil length.
  • the deviation of the contour of the edge (s) can in turn be regular (for example in the form of a wavy line or zigzag shape), although an irregularity is preferred.
  • the size of the deviation is provided in such a way that there is a relevant effect on the media pulse, so that a microscopic roughness (e.g.
  • the edge is not yet to be understood as a deviation.
  • the maximum deviation in the direction is less than 1/15 of the airfoil length and the maximum deviation in the opposite direction is less than 1/15 of the airfoil length.
  • the contour preferably deviates from the initial contour, which is used as a reference, in such a way that the maximum deviation lies in the range determined by the above values. Particularly in the case of an irregular configuration of the edge (s), it can be provided that the deviation from an inclined starting contour tends to zero on average.
  • the offset of the arrangement comprises an orientation and / or a positioning of the blade.
  • An arrangement of the blades that breaks the symmetry can also influence the media impulses in the desired manner, which are caused by the blades when they pass through another component of the fan.
  • an arrangement of a blade can be changed compared to a (conceptually assumed) conventional arrangement, for example in the case of a radial fan, on the one hand by rotating the blade about an axis that is parallel to the axis of rotation, i.e. deviates in its orientation.
  • Another change can be described by the fact that the airfoil in the Impeller of the radial fan defined level is arranged offset.
  • the offset in the plane and a change in the orientation are preferably combined with one another.
  • each airfoil of the plurality of airfoils differs from every other airfoil of the plurality of airfoils in a contour and / or inclination of the trailing edge of the airfoils.
  • the fan is a radial fan or a diagonal fan and the rotating element comprises a support disk and / or a cover disk, an outer contour of the support disk and / or the cover disk having a deviation that varies over the circumference compared to a circle , with a maximum outward deviation of at least 1/150 of the disk diameter and a maximum inward deviation of at least 1/150 of the disk diameter.
  • the support disk and the cover disk of a radial fan impeller also contribute to the rotary sound, so that the invention here can include influencing the rotary sound by appropriately designing the contour.
  • the cover disk and / or the support disk compensation for an imbalance of the blade arrangement that occurs due to deviations of the blade blades from one another can be achieved.
  • the differences with regard to the trailing edge and the arrangement are dimensioned such that a center of mass of the rotating element coincides with an axis of rotation of the rotating element.
  • the variations of the dimensioning used for this, that the center of gravity of the rotating element coincides with the axis of rotation (i.e. that no imbalance occurs), are not due to the previously mentioned deviations, for example of the blades limited against each other.
  • Fig. 1 shows a schematic representation of a radial fan to illustrate noise development during operation.
  • Figures 1a and 1b show the velocity profile in the casing and after the blade outlet.
  • Fig. 2 shows a schematic side view of an impeller as an aspect of a first embodiment of a fan according to the invention.
  • the fan is a radial fan, the impeller 10 having a support disk 12 and a cover disk 14, between which blades 16a, 16b, 16c, 16d, 16e are attached.
  • the person skilled in the art is familiar with the basic complexity of an impeller and also the other elements of a fan (here radial fan), so that no further explanation is necessary in this regard.
  • the blades each have a trailing edge 16a ', 16b', 16c ', 16d'.
  • FIG. 3 illustrates views of blades of the impeller shown in Fig. 2 is illustrated.
  • the airfoils 16a-16g point to the one shown in FIG Fig. 3 left side the respective trailing edge 16a'-16g '.
  • the edges facing the support disk and the cover disk are of conventional design.
  • the leading edges 16a "-16g" (each in the illustration of FIG Fig. 3 right) conventionally executed.
  • trailing edges 16a'-16g 'of the airfoils 16a-16g each have a contour which differs for each trailing edge from all trailing edges of the other airfoils. In other words, all trailing edges 16a'-16g 'are different from one another in pairs.
  • the contours are different in an order of magnitude above (preferably significantly above) inherently unavoidable fluctuations in a component geometry (on a sufficiently small scale, differences can always be identified for otherwise supposedly identical components, in particular due to the manufacturing process) that, for example, when the contour lines of two trailing edges are superimposed, these lines cannot, or at least not completely, be brought into congruence.
  • the contour can preferably be designed so that the edge from the support disk to the cover disk represents random or at least pseudo-random projections or recesses in relation to an imaginary "center line" within the scope of the continuity of the edge.
  • an edge profile can be described by a rule or a mathematical function, in which case, however, all blade edges still differ from one another, either by applying different rules or functions and / or by applying different parameters for one same rule or function.
  • FIG. 4 Illustrated further views of the impeller shown in Fig. 2 is illustrated.
  • Figure 4a shows a top view of the impeller 10 with the cover disk removed, so that the position and orientation of the blades 16a-16g on the support disk 12 can be seen.
  • the airfoils also have a mass distribution that differs from one another. In order to nevertheless achieve that the center of mass coincides with the axis of rotation of the impeller 10 in a manner sufficient for a person skilled in the art (i.e.
  • the blades 16a-16g are each essentially perpendicular a plane defined by the support disk and a respective outer end at corresponding interval positions each pivoted about an axis parallel to the axis of rotation of the impeller 10, so that the center of gravity of the impeller 10 (then with cover plate 14) is at a desired position.
  • the design of the contour of the trailing edge 16a "-16g" and the arrangement of the respective airfoil are related to one another.
  • the blades 16a-16g and the support plate 12 or the cover plate 14 if the blades are to be attached to the cover plate 14 first) are coded with one another. This can be achieved, for example, in that the blade blades have clearly arranged and / or combined extensions and the support disk is provided with suitable slots for receiving the extensions at the corresponding positions (see also Fig. 7 ).
  • FIG. 5 shows to Fig. 4 comparable views of a conventional impeller.
  • the conventional impeller has a symmetry with respect to a rotation of 60 °.
  • Figure 5b The same applies to Figure 5b .
  • Fig. 6 shows a trailing edge of an airfoil of a fan according to an embodiment of the invention in detail and in comparison with a conventional airfoil.
  • the blade 16 shown which is arranged between the support disk 12 and the cover disk 14 of the rotating element of the fan, has a trailing edge 16a 'which initially extends from a corresponding trailing edge of an airfoil of a conventional fan ( Figure 6b ) differs by its irregularity.
  • a center line 18, which represents a straight averaging of the contour of the trailing edge 16a 'from its contact with the support disk 12 to its contact with the cover disk 14, compared to a vertical connection between support disk 12 and cover disk 14 (parallel to the axis of rotation of the impeller) is inclined. Even if it can be provided that this center line and the contour coincide with one another at the respective ends, this feature is not necessary for the invention.
  • Fig. 7 shows a plan view of a support disk of an impeller of an embodiment of a fan according to the invention.
  • the support disk 12 'of this embodiment has an irregular circumference, which is shown in FIG Fig. 7 is illustrated in comparison to an approximately circular perimeter 20. On the basis of this regular circumference 22, the irregularity of the support disk 12 'can be easily recognized.
  • Such a design of the outer contour of the support plate 12 ' leads to the fact that a media impulse caused by the support disk 12 'during the rotation of the impeller with this support disk loses continuity and / or regularity, so that less disturbing noises are produced.
  • mounting slots 20 provided in the support disk 12 ' can be seen, which are used to accommodate corresponding extensions of the blades during the assembly of the impeller, whereby these mounting slots 20, with a corresponding arrangement, extension and / or shape, can serve to ensure that the blades are only in one can be mounted in a predetermined manner and arrangement. In this way it can be avoided, for example, that an imbalance is introduced into the impeller by mistakenly interchanging two irregular blades.
  • Fig. 8 shows an impeller of an embodiment of a fan according to the invention with the support disk from FIG Fig. 7 .
  • the support disk 12 'as part of an impeller 10' together with blades is comparable to Fig. 2 and Fig. 3 and a cover plate 14 is shown.
  • Fig. 9 illustrates a blade according to a further embodiment of a fan according to the invention.
  • the airfoil 16h is similar to the airfoil 16a-16g discussed above, with an irregularly shaped contour of a trailing edge 16h 'and projections 24 (matching the corresponding assembly slots of a support disk, see e.g. Fig. 7 ) Mistake.
  • the leading edge 26 of the airfoil 16h is also equipped with an irregular contour, which also helps to reduce the development of disruptive noise.
  • Fig. 10 illustrated the shovel blade Fig. 9 in an installed state in an impeller.
  • the blade 16h which is shown in FIG Fig. 9 is illustrated, shown in the assembled state between the support plate 12 and the cover plate 14 of the impeller 10 ′′.
  • Fig. 11 shows views of a cover plate of an embodiment of a fan according to the invention.
  • Figure 11a shows the cover plate 14 'in a plan view
  • Figure 11b shows the cover plate 14 'in a perspective view.
  • a regular circumference 22 ' is also shown here as a reference.
  • FIG. 11 shows a view of an impeller with the cover disk from FIG Fig. 11 .
  • the impeller 10 '" has, like that in Fig. 8
  • the illustrated impeller 10 ′′ has the support disk 12 ′ with an irregular circumference, the impeller 10 ′ ′′ also having blade blades with irregular trailing edge contours and at least one blade 16g with an irregular trailing edge and an irregular leading edge (see Fig. 9 ) is provided.
  • the impeller 10 '" also has the cover plate 14', which in FIG Figures 11a and 11b is shown.
  • Fig. 13 shows another illustration of the impeller shown in Fig. 2 is illustrated.
  • the impeller 10 comprises the support disk 12, several blades 16a-16g (the blade 16d is shown in FIG Fig. 13 covered by the cover plate 14) and the cover plate 14.
  • the illustrated contours of the trailing edges, the leading edge, the support disk and the cover disk are only intended to serve as an illustration, without the invention being restricted to the specific shapes.
  • Fig. 14 shows schematically a flowchart which illustrates an embodiment of a method according to the invention for constructing a fan.
  • two blades are first designed, in which step the trailing edges and, if applicable, the leading edges and / or the surface contours are each designed in such a way that they differ from one another.
  • step 103 a further airfoil is first designed, this airfoil in turn being designed in such a way that it differs from all previously designed airfoils with regard to at least the trailing edge contour and / or inclination. This step is repeated until the intended number of blades has been laid out.
  • step 105 the positions and orientations of the airfoils are initially determined provisionally, with these positions and / or orientations being iteratively adapted in step 107 until a desired reduction in an imbalance possibly caused by the different configurations of the airfoil is achieved and thus the construction of the fan can be regarded as completed in this regard.
  • the method described above represents only one embodiment of the method according to the invention.
  • An adaptation of the orientation and / or positioning of the blade blades may possibly be unnecessary or supplemented by adapting the outer contours of the support disk and / or the cover disk, this adaptation advantageously being an irregular adaptation, as is shown, for example, in FIGS Fig.
  • Fig. 15 shows schematically a flow diagram which illustrates an embodiment of a method according to the invention for the pressurized delivery of gaseous medium.
  • step 111 the fan is put into operation and begins to suck in medium and to release it under the application of pressure.
  • the rotating element of the fan rotates so that the various blades of the rotating element pass one component of the fan one after the other.
  • steps 113, 115 and 117 these sequence of steps being repeated until the fan is switched off (step 119).
  • the media impulses that are connected to the component with passages 113, 115 and 117 are different, so that these media impulses do not interrelate can combine together to form an annoying noise.

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Claims (9)

  1. Ventilateur avec un élément rotatif (10, 10', 10", 10"'), par lequel un milieu gazeux est aspiré et est redistribué soumis à l'action d'une pression,
    dans lequel l'élément rotatif (10, 10', 10", 10"') présente plusieurs aubes (16a - 16h),
    dans lequel au moins deux des plusieurs aubes (16a - 16h) se distinguent l'une de l'autre dans une caractéristique qui exerce une incidence sur une impulsion de milieu exercée en fonctionnement sur un composant du ventilateur par l'aube (16a - 16h) respective,
    caractérisé en ce que
    chaque aube (16a - 16h) des plusieurs aubes (16a - 16h) se distingue de chaque autre aube (16a - 16h) des plusieurs aubes (16a - 16h) au moins au niveau d'un contour et/ou d'une inclinaison d'un bord de fuite (16a' - 16h') des aubes (16a - 16h), et
    chaque aube (16a - 16h) des plusieurs aubes (16a - 16h) se distingue de chaque autre aube (16a - 16h) des plusieurs aubes (16a - 16h) en outre au moins au niveau d'un décalage d'un agencement des aubes (16a - 16h) par rapport à un agencement de départ donné par une symétrie de rotation de l'élément rotatif (10, 10', 10", 10"'), dans lequel la symétrie de rotation correspond à un nombre d'aubes de l'élément rotatif (10, 10', 10", 10"'),
    dans lequel les différences eu égard au bord de fuite et à l'agencement sont dimensionnées de telle sorte qu'un centre de gravité de masse de l'élément rotatif (10, 10', 10", 10"') coïncide avec un axe de rotation de l'élément rotatif (10, 10', 10", 10"').
  2. Ventilateur selon la revendication 1,
    dans lequel en outre au moins deux des plusieurs aubes (16a - 16h) se distinguent l'une de l'autre au niveau d'une autre caractéristique qui a une incidence sur une impulsion de milieu exercée en fonctionnement sur un composant du ventilateur par l'aube (16a - 16h) respective, dans lequel l'autre caractéristique qui a une incidence sur une impulsion de milieu exercée en fonctionnement sur un composant du ventilateur par l'aube (16a - 16h) respective comprend en outre
    - un contour et/ou une inclinaison d'un bord d'entrée (26) de l'aube (16a - 16h) et/ou
    - un contour de surface de l'aube (16a - 16h).
  3. Ventilateur selon la revendication 1,
    dans lequel le décalage de l'agencement comprend une orientation et/ou un positionnement de l'aube (16a - 16h).
  4. Ventilateur selon la revendication 1,
    dans lequel les aubes (16a - 16h) se distinguent eu égard à un écart du contour de leur bord de fuite (16a' - 16h') respectif par rapport à un contour de fuite de départ donné,
    dans lequel l'écart du contour du bord de fuite (16a' - 16h') d'au moins une aube (16a - 16h) varie de manière irrégulière du contour de fuite de départ sur l'extension du bord de fuite (16a' - 16h'), dans lequel un écart maximal dans une direction est d'au moins 1/150 d'une longueur d'aube et un écart maximal dans une direction opposée à la direction est d'au moins 1/150 de la longueur d'aube.
  5. Ventilateur selon la revendication 2,
    dans lequel l'autre caractéristique qui a une incidence sur l'impulsion de milieu exercée en fonctionnement sur un composant du ventilateur par l'aube (16a - 16h) respective comprend un contour d'un bord d'entrée (26) de l'aube (16a - 16h),
    dans lequel les au moins deux aubes (16a - 16h) se distinguent eu égard à un écart du contour de leur bord d'entrée (26) respectif par rapport à un contour d'entrée de départ donné,
    dans lequel
    l'écart du contour du bord d'entrée (26) d'au moins une aube (16a - 16h) varie de manière irrégulière du contour d'arrivée de départ sur l'extension du bord d'entrée (26), dans lequel un écart maximal dans une direction est d'au moins 1/150 d'une longueur d'aube et un écart maximal dans une direction opposée à la direction est d'au moins 1/150 de la longueur d'aube.
  6. Ventilateur selon la revendication 4 ou 5,
    dans lequel l'écart maximal dans la direction est inférieur à 1/15 de la longueur d'aube et l'écart maximal dans la direction opposée est inférieur à 1/15 de la longueur d'aube.
  7. Ventilateur selon l'une quelconque des revendications précédentes,
    dans lequel le ventilateur est un ventilateur radial ou un ventilateur diagonal et l'élément rotatif (10, 10', 10", 10"') comprend un disque de support (12, 12') et/ou un disque de recouvrement (14, 14'),
    dans lequel un contour extérieur du disque de support (12, 12') et/ou du disque de recouvrement (14, 14') présente par rapport à un cercle un écart variant sur la périphérie,
    dans lequel un écart maximal vers l'extérieur est d'au moins 1/150 d'un diamètre de disque et un écart maximal vers l'intérieur est d'au moins 1/150 du diamètre de disque.
  8. Procédé de fabrication d'un ventilateur avec un élément rotatif (10, 10', 10", 10"') par lequel un milieu gazeux est aspiré et est redistribué soumis à l'action d'une pression, dans lequel l'élément rotatif (10, 10', 10", 10"') présente plusieurs aubes (16a - 16h), dans lequel le procédé comprend :
    la configuration (101, 103, 105, 107) des aubes (16a - 16h) d'une telle manière qu'au moins deux des plusieurs aubes (16a - 16h) se distinguent l'une de l'autre au niveau d'une caractéristique qui a une incidence sur une impulsion de milieu exercée en fonctionnement sur un composant du ventilateur par l'aube (16a - 16h) respective,
    caractérisé en ce que la configuration (101, 103, 105, 107) est effectuée de telle sorte que
    chaque aube (16a - 16h) des plusieurs aubes (16a - 16h) se distingue de chaque autre aube (16a - 16h) des plusieurs aubes (16a - 16h) au moins au niveau d'un contour et/ou d'une inclinaison d'un bord de fuite (16a' - 16h') des aubes (16a - 16h), et
    chaque aube (16a - 16h) des plusieurs aubes (16a - 16h) se distingue de chaque autre aube (16a - 16h) des plusieurs aubes (16a - 16h) en outre au moins au niveau d'un décalage d'un agencement des aubes (16a - 16h) par rapport à un agencement de départ donné par une symétrie de rotation de l'élément rotatif (10, 10', 10", 10"'), dans lequel la symétrie de rotation correspond à un nombre d'aubes de l'élément rotatif (10, 10', 10", 10"'),
    dans lequel les différences eu égard au bord de fuite et à l'agencement sont dimensionnées de telle sorte qu'un centre de gravité de masse de l'élément rotatif (10, 10', 10", 10"') coïncide avec un axe de rotation de l'élément rotatif (10, 10', 10", 10'").
  9. Procédé de distribution soumise à l'action d'une pression de milieu gazeux, avec :
    l'aspiration du milieu avec un élément rotatif (10, 10', 10", 10'") d'un ventilateur, dans lequel l'élément rotatif (10, 10', 10", 10"') présente plusieurs aubes (16a - 16h),
    dans lequel une aube (16a - 16h) respective exerce une impulsion de milieu sur le composant lors d'un passage (113, 115, 117) d'un composant du ventilateur lors de la rotation de l'élément rotatif (10, 10', 10", 10"'),
    dans lequel le procédé comprend que les impulsions de milieu respectives d'au moins deux des plusieurs aubes (16a - 16h) se distinguent de ce fait en ce que les au moins deux aubes (16a - 16h) se distinguent l'une de l'autre au niveau d'une caractéristique qui a une incidence sur l'impulsion de milieu respectivement exercée,
    caractérisé en ce que
    chaque aube (16a - 16h) des plusieurs aubes (16a - 16h) se distingue de l'autre aube (16a - 16h) des plusieurs aubes (16a - 16h) au moins au niveau d'un contour et/ou d'une inclinaison d'un bord de fuite (16a' - 16h') des aubes (16a - 16h), et
    chaque aube (16a - 16h) des plusieurs aubes (16a - 16h) se distingue de chaque autre aube (16a- 16h) des plusieurs aubes (16a - 16h) en outre au moins au niveau d'un décalage d'un agencement des aubes (16a - 16h) par rapport à un agencement de départ donné par une symétrie de rotation de l'élément rotatif (10, 10', 10", 10"'), dans lequel la symétrie de rotation correspond à un nombre d'aubes de l'élément rotatif (10, 10', 10", 10"'),
    dans lequel les différences eu égard au bord de fuite et l'agencement sont dimensionnées de telle sorte qu'un centre de gravité de masse de l'élément rotatif (10, 10', 10", 10"') coïncide avec un axe de rotation de l'élément rotatif (10, 10', 10", 10'").
EP19181992.9A 2018-04-24 2019-06-24 Ventilateur, son procédé de fabrication et procédé de distribution d'un fluide Active EP3561309B1 (fr)

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PL19181992T PL3561309T3 (pl) 2018-04-24 2019-06-24 Wentylator, sposób jego konstruowania i sposób aplikacji medium

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Publication number Priority date Publication date Assignee Title
US2238749A (en) * 1939-01-30 1941-04-15 Clarence B Swift Fan blade
DE3832026A1 (de) * 1988-09-21 1990-03-22 Bosch Gmbh Robert Luefterrad
JP2002054596A (ja) * 2000-08-10 2002-02-20 Japan Servo Co Ltd 軸流フアン
JP4976791B2 (ja) * 2006-09-08 2012-07-18 東プレ株式会社 遠心ファン用羽根車
DE102009028125A1 (de) * 2009-07-30 2011-02-03 Robert Bosch Gmbh Eintrittsgeometrie für halbaxiale Lüfterräder
US9046109B2 (en) * 2009-09-02 2015-06-02 Apple Inc. Centrifugal blower with asymmetric blade spacing
DE102010009566A1 (de) * 2010-02-26 2011-09-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial- oder Diagonal-Ventilatorrad
DE102014102311A1 (de) * 2014-02-21 2015-08-27 Ebm-Papst St. Georgen Gmbh & Co. Kg Lüfter mit einem mit Laufschaufeln versehenen Laufrad
CN207122440U (zh) * 2017-09-04 2018-03-20 华硕电脑股份有限公司 离心式风扇

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PL3561309T3 (pl) 2022-01-17
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