WO2024253816A1 - Ventilateur modulaire à haut rendement et procédé associé - Google Patents

Ventilateur modulaire à haut rendement et procédé associé Download PDF

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Publication number
WO2024253816A1
WO2024253816A1 PCT/US2024/029413 US2024029413W WO2024253816A1 WO 2024253816 A1 WO2024253816 A1 WO 2024253816A1 US 2024029413 W US2024029413 W US 2024029413W WO 2024253816 A1 WO2024253816 A1 WO 2024253816A1
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WO
WIPO (PCT)
Prior art keywords
fastener holes
blade
array
blades
leg
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.)
Pending
Application number
PCT/US2024/029413
Other languages
English (en)
Inventor
Nick Hansen
Nicholas HEYMER
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.)
Horton Inc
Original Assignee
Horton Inc
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
Application filed by Horton Inc filed Critical Horton Inc
Priority to KR1020257041822A priority Critical patent/KR20260016641A/ko
Priority to AU2024286668A priority patent/AU2024286668A1/en
Priority to CN202480033665.4A priority patent/CN121175497A/zh
Publication of WO2024253816A1 publication Critical patent/WO2024253816A1/fr
Priority to MX2025014406A priority patent/MX2025014406A/es
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D29/34—Blade mountings
    • 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
    • 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
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/31—Retaining bolts or nuts
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to fans, and more specifically to axial flow cooling fans having a modular design, their component blade and hub parts, and associated methods of making and using the same.
  • Large format axial flow fans are used for a variety of cooling needs. For example, they can be used to cool power generators and large mining trucks.
  • the diameter range of these fans are typically between 60 and 100 inches (152.4 to 254 cm) in diameter.
  • the duty cycle of the equipment dictates the need for very durable, long-lasting components.
  • similar' equipment may be used very intermittently in other applications, allowing for more design choices in the material, design, and life targets.
  • a good example of this is a stand-by generator as compared to a prime power generator.
  • the stand-by generator is only used for short time durations and only when needed.
  • the prime power generator needs to run nearly all the time. Thus, the prime power generator accumulates running time much more rapidly. Because of this difference in usage, it is not economically efficient to use the same components for both applications. In the case of the cooling fan, this opens up design and material choices.
  • fans are molded to a set diameter and trimmed to smaller diameters in order to accommodate space constraints. Such trimming reduces the blade lengths. However, such trimming also can affect the blade shape, particularly where the blades have profiles that vary along their lengths.
  • the HTEC® fan blades are attached to the center discs by a two-piece riveting system (involving two- piece fasteners with pins and collars) such as those sold under the huckbolt® brand name, although it is possible to use other types of mechanical fasteners with these types of fans.
  • a two-piece riveting system involving two- piece fasteners with pins and collars
  • the center discs of the fan can be made to different diameters, which allows for differently sized fans without having to trim the lengths of the blades. This is important in that the shape of the HTEC® fan blades is very important to the fan’s performance.
  • Another known fan design available from Horton, Inc.
  • WindMasterTM composite nylon fans which feature plastic fan blades attached to a single metal spider at one side of each fan blade. Different spiders can be substituted to provide desired blade counts, diameters, and blade pitches.
  • a modular axial flow fan includes a plurality of blades each having a working portion and a root with an attachment pad, each attachment pad having a plurality of blade fastener holes arranged in an array (FA), a spider assembly including a front spider and a rear spider with each of the front and rear spiders having a center hub and a plurality of legs extending from the center hub and each leg having a plurality of leg fastener holes arranged in an array (SA), and a plurality of mechanical fasteners securing each of the plurality of blades to a corresponding one of the legs of each of the front and rear spiders such that one of the plurality of mechanical fasteners is secured at each and every one of the plurality of blade fastener holes in the array (FA) of each of the plurality of blades.
  • FA array
  • SA plurality of mechanical fasteners
  • the front and rear spiders have the same structural configuration.
  • Each array (FA) of the plurality of blade fastener holes of each of the plurality of blades is circumferentially asymmetrical.
  • the plurality of mechanical fasteners are secured at a subset (SAI) of the leg fastener holes of the array (SA) in each of the legs of the front and rear spiders, the subset (SAI) of the leg fastener holes of the array (SA) of each of the legs being aligned with the array (FA) of the plurality of blade fastener holes of a corresponding one of the plurality of blades, and at least two of the plurality of leg fastener holes of each of the legs of the front and rear spiders are circumferentially offset from the subset (SAI) of the leg fastener holes and arc obstructed by the root of the corresponding one of the plurality of blades so as to be unused for any of the plurality of mechanical fasteners.
  • a modular fan in another aspect, includes a plurality of blades each having a working portion and a root with an attachment pad that is substantially planar, each attachment pad having a plurality of blade fastener holes arranged in an array (FA) bounded by a perimeter having a parallelogram shape that is either a rhomboid or a rhombus with no right angles, a spider assembly including a front spider and a rear spider that have the same structural configuration with a center hub and a plurality of legs extending from the center hub and each leg having a plurality of leg fastener holes arranged in an array (SA), each of the plurality of legs having an attachment portion that is substantially planar and a connecting portion that is twisted, the array (SA) including leg fastener holes constituting a subset (SAI) of the plurality of leg fastener holes plus at least one additional fastener hole on opposite sides of the subset (SAI) in a circumferential direction, and a plurality of mechanical fasteners
  • One of the plurality of mechanical fasteners extends through each and every one of the plurality of blade fastener holes in the array (FA) of each of the plurality of blades and also through every fastener hole in the subset (SAI).
  • the at least one additional fastener holes on opposite sides of the subset (SAI) in a circumferential direction are obstructed by the root of the corresponding one of the plurality of blades and unused by any of the plurality of mechanical fasteners, and a first of the at least one additional fastener hole on one side of the subset (SAI) is radially offset from a second of the at least one additional fastener hole on the other side of the subset (SAI).
  • a method of making an axial flow fan includes (a) arranging a front spider adjacent to a rear spider flipped front-to-back relative to each other, the front spider and the rear spider having the same structural configuration with a plurality of legs extending radially and each leg having a plurality of leg fastener holes arranged in an array (SA) that includes leg fastener holes constituting a subset (SAI) of the plurality of leg fastener holes plus at least one additional fastener hole on each side of the subset (SAI) in a circumferential direction, (b) arranging a blade in between a first of the plurality of legs of the front spider and a first of the plurality of legs of the rear spider, the blade having a plurality of blade fastener holes arranged in an array (FA) through an attachment pad, the blade arranged such that the subset (SAI) of the plurality of leg fastener holes align with the plurality of blade fastener holes of the array (FA), and with each
  • FIG. 1 is a front perspective view of a modular fan according to an embodiment of the present invention.
  • FIG. 2 is a sectional view of a portion of the modular fan, taken along line 2-2 of FIG. 1.
  • FIG. 3A is a rear elevation view of a blade of the modular fan, shown in isolation.
  • FIG. 3B is a bottom perspective view of the blade.
  • FIG. 4A is a front perspective view of a spider of the modular fan, shown in isolation.
  • FIG. 4B is a bottom plan view of the spider.
  • FIGS. 5 A and 5B are front and rear perspective views, respectively, of a portion of the modular fan.
  • disclosed embodiments of the present invention provide a relatively high efficiency axial flow fan with a modular construction, which is suitable for large format cooling applications.
  • blades of the modular fan can be made of injection molded polymer or composite materials suitable for lower demand cooling applications.
  • Embodiments of the modular fan can also utilize blade attachments with improved modularity.
  • the modular fan can provide for modular adjustment of fan diameter, blade count, and blade pitch while preserving fan blade shapes that are capable of relatively high efficiency operation (e.g., without requiring blade length trimming). Associated methods of making and using such fans are also provided.
  • Some cooling fan applications have low load or intermittent duty cycles, whereas other applications require very durable, long-lasting components.
  • Such desired flexibility can be achieved with a fan according to the present invention through the use of molded blades (e.g., a set of molded blades all having a single identical configuration) that are attached to a spider hub in a modular manner, in which the blade count, spider diameter, and blade pitch can be adjusted as designed for particular applications in order to customize the resultant fan while using, minimally modifying, and/or repurposing a number of common modular starting components.
  • relatively high efficiency fan blades can be utilized, and overall fan diameter can be adjusted without the need to trim the lengths of the fan blades.
  • FIGS. 1 to 5B One embodiment of a modular fan 20 according to the present invention, and individual components thereof, is shown in FIGS. 1 to 5B.
  • the fan 20 includes a plurality of blades 22 and a spider assembly 24.
  • the spider assembly 24 as shown includes a plurality of individual spiders (or center discs) 24A and 24B.
  • a spacer and/or bushing 26 can optionally be provided as well, in some embodiments.
  • the blades 22 can be configured as discrete, separate fan blades.
  • the blades 22 can each include a working portion 22-1 and a root or heel portion 22-2.
  • the working portion 22-1 is used to interact with fluids and perform work to generate axial cooling flows from rotation of the fan 20, while the root or heel portion 22-2 is used to mechanically connect each blade 22 to the rest of the modular fan 20.
  • the working portion 22-1 extends between leading and trailing edges LE and TE in a chordwise direction and from the root 22-2 to a tip in a lengthwise (or spanwise) direction, and has opposite pressure and suction sides.
  • Each blade 22 can be integrally formed, with the working portion 22-1 integrally formed with the root 22-2, in some embodiments.
  • the blade roots 22-2 are configured to include substantially flat attachment pads 22-2A having fastener openings or holes 22-2F passing between opposite front and back sides 22-2S and 22-2P.
  • the fastener openings or holes 22-2F can each be generally cylindrical, with a generally circular perimeter, in typical embodiments.
  • the fastener holes 22-2F can be arranged substantially normal to the front and back sides 22-2S and 22-2P, in some embodiments, or alternatively canted.
  • individual blades 22 are made of composite material, although, in alternate embodiments, the blades 22 could be made of metal or other suitable materials.
  • the blades 22 of the illustrated embodiment can all have a relatively high- efficiency blade profile (e.g., in the working portion 22-1), and all of the blades 22 can have a substantially identical configuration.
  • the shape of the blades 22 can be generally similar to that of HTEC® fan blades available from Horton, Inc. (Roseville, MN, USA) and/or generally similar to that of blades disclosed in PCT International Pat. App. Pub. No. WO20 15/171446A1.
  • the blades 22 can have other shapes and sizes in further embodiments, depending on the needs for the desired application or cooling system.
  • the blades 22 need not have a reduced thickness or gap at an outer edge of the spider assembly 24 like that discussed in PCT International Pat. App. Pub. No.
  • the blades 22 can be injection molded from a polymer material like a thermoplastic material such as nylon, in some embodiments.
  • the nylon can optionally include stiffening fillers such as glass or carbon fiber in order to increase the stiffness and strength of the material and the resultant blades 22.
  • Injection molding of the blades 22 is a much less time-consuming process than compression molding of a thermoset composite material.
  • the thermoplastic also has a lower density, thus allows for a lighter fan assembly.
  • other blade materials and/or manufacturing methods can be utilized.
  • the modular fan 20 further includes the spider assembly 24 made up of multiple individual spiders (or center discs) 24A and 24B. hr the illustrated embodiment, there are two spiders 24A and 24B, with a front spider 24A and a rear spider 24B on opposite sides of the blades 22, and each spider 24A and 24B is substantially identical, such as being structurally the same. However, the use of spiders having different configurations is possible in further embodiments.
  • Each spider 24A and 24B has a center hub 24H, which can be configured as a substantially planar disc, and which can optionally include a center opening 24C.
  • the spacer and/or bushing 26 can be provided in between the spiders 24A and 24B at the center opening 24C to help provide structural support and/or to facilitate attachment of the modular fan 20 to a drive shaft or other mounting location structure.
  • Each spider 24A and 24B further includes a plurality of anus or legs 24L that extend outward from an outer diameter of the hub 24H in a generally radial direction.
  • Each spider leg 24L can include an attachment portion 24L-1 and a connecting portion 24L-2.
  • the attachment portion 24L-1 can be generally planar and can be located at a distal (or outer) end of each leg 24L. In the illustrated embodiment, the attachment portions 24L-1 have generally rectangular perimeter shapes.
  • a plurality of fastener holes or openings 24L-1F are provided in each of the attachment portions 24L- 1 to facilitate attachment of one of the blades 22 to each spider leg 24L with suitable mechanical fasteners 28 (e.g., rivets, two-part pin and collar fasteners, bolts, or the like), as explained further below.
  • the fastener openings or holes 24L-1F can each be generally cylindrical, with a generally circular perimeter, in typical embodiments.
  • the fastener holes 24L-1F can be arranged substantially parallel to each other in some embodiments.
  • the fastener holes 24L-1F can be arranged substantially normal to opposite front and back sides of the attachment portion 24L-1, in some embodiments, or alternatively can be canted.
  • Each of the connecting portions 24L-2 extends between a corresponding one of the attachment portions 24L- 1 and the hub 24H, such that the connecting portions 24L-2 can be located generally radially in between the attachment portions 24L-1 and the hub 24H to structurally connect them.
  • the connecting portions 24L-2 are twisted, which allows the attachment portion 24L-1 (which can be generally planar) to be twisted relative to the center hub 24H (which can also be generally planar) and the axial direction.
  • a twist angle established by the connecting portions 24L-2 of the spider legs 24L sets a twist angle 0 of the attachment portion 24L- 1 as well as for the corresponding blade 22 (at least at the root 22-2).
  • the twist angle 0 is measured relative to the center hub 24H and/or relative to a plane perpendicular to the axis of rotation. Typically, the twist angle 0 is greater than 0° and less than 90°. In this way, the orientation of the attachment portion 24L-1 and the orientations of the fastener holes 24L-1F relative to the axis of rotation of the fan 20 can be modified by adjusting the twist angle 0, and the front and rear spiders 24A and 24B can both have legs 24L that are twisted to a desired manner for a given application while the same basic spider piece parts can have legs 24L twisted to different angles for different applications, thus allowing the basic spider piece parts to be utilized for a range of different final fan configurations.
  • the fastener holes 22-2F through the attachment pad 22-2A of a given blade root 22-2 of the illustrated embodiment are arranged in an array FA that is bounded by a perimeter P with a parallelogram shape in the form of a rhomboid or non-square rhombus (indicated schematically with dashed lines, for reference purposes only).
  • the pattern of the array FA of fastener holes 22-2F in the attachment pad 22-2A can be asymmetrical relative to a radial line RA passing through a middle portion of the array FA, that is, the array FA can be circumferentially asymmetrical. More specifically, as shown in the embodiment of FIG.
  • fastener holes 22-2F through the attachment pad 22-2A arranged in two parallel and substantially linear rows FRI and FR2 (indicated schematically with dashed lines, for reference purposes only) that are positioned diagonally with respect to a radial direction or the blade length or spanwise direction, on the one hand, and also with respect to a chordwise or circumferential or tangential direction (or an axis perpendicular to the radial direction), on the other hand.
  • the rows FRI and FR2 of the fastener holes 22-2F in the attachment pad 22-2A are arranged at an angle D relative to an axis that is perpendicular to the radial (or blade length) direction, with the angle D being greater than 0° and less than 90°, such as approximately 45°.
  • FIG. 3A which depicts the back side or pressure side of the illustrated blade 22, the angle D is angled toward the leading edge LE of the blade 22.
  • the blade length direction might be the same as the radial direction, as it is in the illustrated embodiment, in alternate embodiments a blade length (or stacking line) might be oriented non-radially, such as if blades were attached to the spider assembly 24 in a non-radial manner. Additionally, as shown in FIG.
  • the fastener holes 22-2F in the parallel, diagonal rows FRI and FR2 arc arranged to be aligned with each other in the radial or blade length direction; that is, the fastener holes 22-2F in each diagonal row FRI or FR2 can align with parallel projected lines PL (for example, three parallel projected lines PL) extending perpendicular to the blade length or radial direction that pass through a corresponding fastener hole 22-2F in another row FRI or FR2.
  • the arrangement of the fastener holes 22-2F in the illustrated embodiment is suitable to accommodate loading forces on the blade 22 and the fasteners 28 (e.g., rivets) during use.
  • a circumferentially asymmetrical configuration of the pattern of the array FA of fastener holes 22-2F helps to confirm the desired orientation of the blades 22, which can assist with fabrication of the fan 20 in situations where the leading and trailing edges LE and TE may otherwise be difficult to distinguish.
  • larger or smaller numbers of fastener holes 22-2F can be used, and they can be arranged in a larger number of diagonal rows (along the same parallel projected lines PL) and/or be arranged along a larger or smaller number of parallel projected lines PL, and the angle D can vary as desired for particular applications.
  • the fastener holes 22- 2F can have a non-linear arrangement relative to each other in the circumferential direction, such as being arranged along arc segments, chevron- shaped segments, etc. that are circumferentially symmetrical relative to the radial line RA passing through a middle portion of the array FA.
  • the fastener holes 24L-1F through the attachment portion 24L-1 of a given spider leg 24L of the illustrated embodiment are arranged in an array SA having a greater number of attachment or fastener holes 24L-1F than in the array FA in the attachment pads 22-2A of the blades 22 (for example, eight fastener holes 24L-1F and six fastener holes 22-2F), which allows the fastener holes 22-2F in the attachment pads 22-2A of the blades 22 to align with fastener holes 24L-1F in the attachment portions 24L-1 of the spider legs 24L regardless of the front/back orientation of the blades 22 and the spider 24A or 24B relative to each other and also where multiple identical spiders 24A and 24B are arranged differently with respect to each other.
  • the fastener hole array SA of each spider leg 24L when arranged in a given front/back orientation includes a subset SAI of fastener holes 24L-1F arranged in the same array pattern as the fastener holes 22-2F in the attachment pads 22-2A of the blades 22 (e.g., with a rhomboid or rhombus parallelogram perimeter shape) but with one additional fastener hole or opening 24L-1F’ and 24L-1F” at each side (in the circumferential direction), such as at opposing corners of the resultant attachment portion array SA.
  • the resultant pattern of the array SA of the fastener holes 24L-1F in the attachment portion 24L-1 of a given spider leg 24L appears like a repeating quincunx pattern.
  • Mechanical fasteners 28 such as rivets, two-piece fasteners with pins and collars (e.g., huckbolt® brand fasteners), bolts, or the like — are used to secure individual blades 22 to corresponding legs 24L of the spiders 24A and 24B.
  • the mechanical fasteners 28 can be made of a metallic material.
  • the mechanical fasteners 28 each have a shaft, pin, or shank portion with head or collar portions at opposite ends (at least when fully installed and engaged). As shown in FIGS.
  • the patterns of the arrays SA of the fastener holes 24L-1F in the attachment portions 24L-1 of the spider legs 24L allow the use of two identical spiders 24A and 24B to make the modular’ fan 20, with front and rear spiders 24A and 24B arranged with one of the spiders 24A or 24B flipped over front-to-back relative to the other 24A or 24B.
  • the extra fastener holes 24L-1F’ and 24L-1F” in the attachment portions 24L-1A of the spider legs 24L mean that the subset SAI of the fastener holes 24L-1F in corresponding legs 24L of each of the front and back spiders 24 A and 24B align with the array FA of fastener holes 22-2F in the attachment pad 22-2A of a corresponding blade 22.
  • all of the fastener holes 22-2F in the attachment pads 22-2A of the blades 22 can align with corresponding fastener holes 24L-1F in identically-configured front and back spiders 24A and 24B arranged in a flipped relationship to each other, with each spider 24A and 24B having additional or extra fastener holes 24L-1F’ and 24L-1F” that are not aligned with any corresponding fastener hole 22-2F in the attachment pad 22-2A of the corresponding blade 22 (for example, arranged outside of the perimeter P of the array FA) and are circumferentially offset from the array subset SAI.
  • corner fastener holes 24L-1F’ and 24L-1F” at the outer right and inner left of the array SA in the front side spider’s 24A spider legs 24L are obstructed or blocked by material of the blade root 22-2 at the attachment pad 22-2A and unused for fasteners 28 (see FIG. 5A), and corner fastener holes 24L-1F’ and 24L-1F” at the outer left and inner right of the array SA in the rear spider’s 24B spider legs 24L are similarly obstructed and unused for fasteners 28 (sec FIG.
  • the obstructed fastener holes 24L-1F’ and 24L-1F” of a given one of the spider legs 24L can include at least one fastener hole 24L-1F’ or 24L-1F” located on each circumferential side of the subset SAI of the array SA and on circumferentially opposite sides of the radial line RA, and at least some of those obstructed fastener holes 24L-1F’ and 24L-1F” at spaced-apart circumferential locations can be radially offset relative to each other.
  • Use of multiple spiders 24 A and 24B in the modular fan 20 can help provide improved strength, rigidity, and durability compared to the use of a single spider, with a relatively small size and weight penalty, which can be useful for large fans.
  • Use of identical spiders 24A and 24B in different orientations also helps to reduce distinct/unique part count and the associated cost of manufacturing the modular fan 20.
  • a modular axial flow fan can include a plurality of blades each having a working portion and a root with an attachment pad, each attachment pad having a plurality of blade fastener holes arranged in an array (FA), a spider assembly including a front spider and a rear spider, the front and rear spiders having the same structural configuration, each of the front and rear spiders having a center hub and a plurality of legs extending from the center hub and each leg having a plurality of leg fastener holes arranged in an array (SA), and a plurality of mechanical fasteners securing each of the plurality of blades to a corresponding one of the legs of each of the front and rear spiders, such that one of the plurality of mechanical fasteners is secured at each and every one of the plurality of blade fastener holes in the array (FA) of each of the plurality of blades.
  • FA array
  • SA plurality of mechanical fasteners
  • Each array (FA) of the plurality of blade fastener holes of each of the plurality of blades is circumferentially asymmetrical.
  • the plurality of mechanical fasteners are secured at a subset (SAI) of the leg fastener holes of the array (SA) in each of the legs of the front and rear spiders, the subset (SAI) of the leg fastener holes of the array (SA) of each of the legs being aligned with the array (FA) of the plurality of blade fastener holes of a corresponding one of the plurality of blades.
  • At least two of the plurality of leg fastener holes of each of the legs of the front and rear spiders are circumferentially offset from the subset (SAI) of the leg fastener holes and are obstructed by the root of the corresponding one of the plurality of blades so as to be unused for any of the plurality of mechanical fasteners.
  • SAI subset
  • the plurality of blades can each be made of a polymer
  • the front and rear spiders can each be made of a metallic material
  • At least two of the plurality of leg fastener holes in each of the legs of the front and rear spiders that are obstructed and unused can be radially offset from each other; [0040] the array (FA) of the plurality of blade fastener holes of each of the plurality of blades is bounded by a perimeter with a parallelogram shape in the form of either a rhomboid or nonsquare rhombus;
  • the plurality of blade fastener holes of the array (FA) of each of the plurality of blades can be arranged in parallel rows positioned diagonally with respect to both a blade length direction and a chordwise direction;
  • the plurality of blade fastener holes in the parallel rows can be arranged to be linearly aligned with each other in the blade length direction;
  • the array (SA) of the plurality of leg fastener holes of each of the legs of the front and rear spiders can include exactly eight leg fastener holes;
  • the attachment pad of the root of each blade can be planar
  • the legs of the front and rear spiders can have an attachment portion that is planar and a connecting portion that is twisted, and for each leg the connecting portion can be located radially in between the attachment portion and the center hub;
  • the center hub of each of the front and rear spiders can have a center opening
  • the spider assembly can further include a spacer positioned in between the front and rear spiders, such as along the center opening; and/or
  • the front and rear spiders can be arranged so as to be flipped front-to-back relative to each other.
  • the at least one additional fastener holes on the opposite sides of the subset (SAI) in a circumferential direction are obstructed by the root of the corresponding one of the plurality of blades and unused by any of the plurality of mechanical fasteners.
  • a first of the at least one additional fastener hole on one side of the subset (SAI) is radially offset from a second of the at least one additional fastener hole on the opposite side of the subset (SAI).
  • the modular fan of the preceding paragraph can optionally include, additionally and/or alternatively, any one or more of the following features, configurations, and/or additional components:
  • the plurality of blades can each be made of a polymer
  • the front and rear spiders can each be made of a metallic material
  • the plurality of blade fastener holes of the array (FA) of each of the plurality of blades can be arranged in parallel rows positioned diagonally with respect to both a blade length direction and a chordwise direction;
  • the plurality of blade fastener holes (in the parallel rows) can be arranged to be linearly aligned with each other in the blade length direction; and/or
  • the array (FA) of the plurality of blade fastener holes of each of the plurality of blades can include at least six blade fastener holes arranged in multiple rows.
  • a method of making an axial flow fan can include: (a) arranging a front spider adjacent to a rear spider flipped front-to-back relative to each other, the front spider and the rear spider having the same structural configuration with a plurality of legs extending radially and each leg having a plurality of leg fastener holes arranged in an array (SA), the array (SA) including leg fastener holes constituting a subset (SAI) of the plurality of leg fastener holes plus at least one additional fastener hole on each side of the subset (SAI) in a circumferential direction, (b) arranging a blade in between a first of the plurality of legs of the front spider and a first of the plurality of legs of the rear spider, the blade having a plurality of blade fastener holes arranged in an array (FA) through an attachment pad, the blade arranged such that the subset (SAI) of the plurality of leg fastener holes align with the plurality of blade fastener holes of the array (FA), and each of
  • step (d) can optionally include, additionally and/or alternatively, any one or more of the following features, configurations, and/or additional steps: [0059] the repetition of steps (b) and (c) pursuant to step (d) can occur either concurrently or sequentially;
  • each of the plurality of legs relative to a hub of the respective front or rear spider, with each leg having a planar attachment portion arranged at a twist angle;
  • any relative terms or terms of degree used herein should be interpreted in accordance with and subject to any applicable definitions or limits expressly stated herein.
  • any relative terms or terms of degree used herein should be interpreted to broadly encompass any relevant disclosed embodiments as well as such ranges or variations as would be understood by a person of ordinary skill in the art in view of the entirety of the present disclosure, such as to encompass ordinary manufacturing tolerance variations, incidental alignment variations, transient alignment or shape variations induced by thermal, rotational or vibrational operational conditions, transitory signal fluctuations, and the like.
  • any relative terms or terms of degree used herein should be interpreted to encompass a range that expressly includes the designated quality, characteristic, parameter, or value, without variation, as if no qualifying relative term or term of degree were utilized in the given disclosure or recitation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un ventilateur à flux axial modulaire (20) comprenant des pales (22) ayant chacune des trous de fixation de pale (22-2F) agencées en un réseau (FA) qui est asymétrique de manière circonférentielle, un croisillon avant (24A) et un croisillon arrière (24B) ayant la même configuration structurale avec des pieds (24L) s'étendant à partir d'un moyeu central (24H) et chaque pied ayant des trous de fixation de pied (24L-1F) agencés en un réseau (SA), et des éléments de fixation mécaniques (28) fixant les pales à des pieds correspondants. Un élément de fixation mécanique (28) est fixé au niveau de chacun des trous de fixation de pale et au niveau d'un sous-ensemble (SA1) des trous de fixation de pied, chaque sous-ensemble de pied (SA1) de trous de fixation de pied étant aligné avec des trous de fixation de pale du réseau (FA) de la pale correspondante. Au moins deux trous de fixation de pied (24L -1F'et 24L -1F ") de chaque pied sont décalés de lanière circonférentielle par rapport au sous-ensemble (SA1) et sont obstrués par les pales de façon à être inutilisés pour les dispositifs de fixation mécaniques.
PCT/US2024/029413 2023-06-05 2024-05-15 Ventilateur modulaire à haut rendement et procédé associé Pending WO2024253816A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020257041822A KR20260016641A (ko) 2023-06-05 2024-05-15 고효율 모듈식 팬 및 관련 방법
AU2024286668A AU2024286668A1 (en) 2023-06-05 2024-05-15 High efficiency modular fan and associated method
CN202480033665.4A CN121175497A (zh) 2023-06-05 2024-05-15 高效模块化风扇及相关方法
MX2025014406A MX2025014406A (es) 2023-06-05 2025-12-01 Ventilador modular de alta eficiencia y metodo asociado

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363506269P 2023-06-05 2023-06-05
US63/506,269 2023-06-05

Publications (1)

Publication Number Publication Date
WO2024253816A1 true WO2024253816A1 (fr) 2024-12-12

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KR (1) KR20260016641A (fr)
CN (1) CN121175497A (fr)
AU (1) AU2024286668A1 (fr)
MX (1) MX2025014406A (fr)
WO (1) WO2024253816A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05321894A (ja) * 1992-03-18 1993-12-07 Daikin Ind Ltd 軸流ファン
KR100888633B1 (ko) * 2005-03-14 2009-03-12 가부시키가이샤 고마쓰 세이사쿠쇼 블레이드 및 이 블레이드를 구비한 팬
CN203348132U (zh) * 2013-06-21 2013-12-18 江苏富丽华通用设备有限公司 一种双面夹持叶片的轴流通风机支架结构
WO2015171446A1 (fr) * 2014-05-05 2015-11-12 Horton, Inc. Ventilateur composite
CN107171467A (zh) * 2017-07-19 2017-09-15 广东泛仕达机电有限公司 一种电机包铝转子结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05321894A (ja) * 1992-03-18 1993-12-07 Daikin Ind Ltd 軸流ファン
KR100888633B1 (ko) * 2005-03-14 2009-03-12 가부시키가이샤 고마쓰 세이사쿠쇼 블레이드 및 이 블레이드를 구비한 팬
CN203348132U (zh) * 2013-06-21 2013-12-18 江苏富丽华通用设备有限公司 一种双面夹持叶片的轴流通风机支架结构
WO2015171446A1 (fr) * 2014-05-05 2015-11-12 Horton, Inc. Ventilateur composite
CN107171467A (zh) * 2017-07-19 2017-09-15 广东泛仕达机电有限公司 一种电机包铝转子结构

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MX2025014406A (es) 2026-01-07
AU2024286668A1 (en) 2025-11-13
CN121175497A (zh) 2025-12-19
KR20260016641A (ko) 2026-02-03

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