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NZ758350B2 - Cooling tower axial fan in a hollowed disc/ring configuration - Google Patents
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NZ758350B2 - Cooling tower axial fan in a hollowed disc/ring configuration - Google Patents

Cooling tower axial fan in a hollowed disc/ring configuration Download PDF

Info

Publication number
NZ758350B2
NZ758350B2 NZ758350A NZ75835018A NZ758350B2 NZ 758350 B2 NZ758350 B2 NZ 758350B2 NZ 758350 A NZ758350 A NZ 758350A NZ 75835018 A NZ75835018 A NZ 75835018A NZ 758350 B2 NZ758350 B2 NZ 758350B2
Authority
NZ
New Zealand
Prior art keywords
disc
annular
ring
cooling tower
annular ring
Prior art date
Application number
NZ758350A
Other versions
NZ758350A (en
Inventor
Araujo Pereira Andrade Ricardo De
Luigi Martini
Daniel Strauss
Original Assignee
Evapco Inc
Filing date
Publication date
Application filed by Evapco Inc filed Critical Evapco Inc
Priority claimed from PCT/US2018/028884 external-priority patent/WO2018195539A1/en
Publication of NZ758350A publication Critical patent/NZ758350A/en
Publication of NZ758350B2 publication Critical patent/NZ758350B2/en

Links

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
    • F04D19/00—Axial-flow 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
    • 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
    • F04D29/26—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
    • 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
    • F05D2250/20—Three-dimensional
    • F05D2250/29—Three-dimensional machined; miscellaneous
    • F05D2250/291—Three-dimensional machined; miscellaneous hollowed
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

Disclosed is an improved fan hub for a cooling tower having a first disc with radially extending spokes for reduced fan natural frequencies and an annular seal disc to cover an open area, including a V-shaped hollow space of a second disc, in order to avoid flow return. A cooling tower axial fan hub comprising of a first disc [9] configured to connect to a central boss [7], a second disc [11] bolted to said first disc through connecting elements of a plurality of fan blades, said connecting elements sandwiched between said first disc and said second disc and a seal disc [31] comprising an annular ring having an outer diameter and an inner diameter attached to said second disc to inhibit flow return, the said first disc comprising two concentric annular rings [21; 23] connected to one-another via a plurality of radially extending spokes, a central axis of each of said plurality of radially extending spokes [25] extending along a radius of said first disc, wherein said spokes define a plurality of hollow spaces [26] in said first disc, said two concentric annular rings comprising an annular outer ring and an annular inner ring, said annular inner ring configured to connect to said central boss whereas the said second disc comprising only an annular ring having an inner diameter and an outer diameter, said annular ring of said seal disc dimensioned to cover an open area between said second disc annular ring inner diameter and said central boss.

Claims (6)

Claims:
1. A cooling tower axial fan hub comprising: a first disc configured to connect to a central boss; a second disc bolted to said first disc through connecting elements of a plurality of fan blades, said connecting elements sandwiched between said first disc and said second disc; a seal disc comprising an annular ring having an outer diameter and an inner diameter attached to said second disc to inhibit flow return; said first disc comprising two concentric annular rings connected to one-another via a plurality of radially extending spokes, a central axis of each of said plurality of radially extending spokes extending along a radius of said first disc, wherein said spokes define a plurality of hollow spaces in said first disc, said two concentric annular rings comprising an annular outer ring and an annular inner ring, said annular inner ring configured to connect to said central boss; said second disc comprising only an annular ring having an inner diameter and an outer diameter, said annular ring of said seal disc dimensioned to cover an open area between said second disc annular ring inner diameter and said central boss.
2. A cooling tower axial fan hub according to claim 1, wherein said first and second discs have constant outer diameters having outer perimeter edges with no indentations or recesses.
3. A cooling tower axial fan hub according to claim 2, wherein said second disc annular ring has a constant inner diameter having an inner perimeter edge with no indentations or recesses.
4. A cooling tower axial fan hub according to claim 1, wherein said first disc has an outer perimeter edge having regularly spaced indentations.
5. A cooling tower axial fan hub according to claim 4, wherein said second disc comprising only an annular ring has a constant outer diameter and an outer perimeter edge with no indentations or recesses, and an inner perimeter edge having regularly spaced indentations.
6. A cooling tower axial fan hub comprising: a first disc configured to connect to a central boss, and the first disc is planar; a second disc bolted to said first disc through connecting elements of a plurality of fan blades, said connecting elements sandwiched between said first disc and said second disc, and the second disc is planar; a seal disc comprising an annular ring having an outer diameter and an inner diameter attached to said second disc; said first disc comprising a plurality of corresponding and regularly spaced first disc fan blade connecting segments, said second disc comprising a plurality of corresponding and regularly spaced second disc fan blade connecting segments, said first disc fan blade connecting segments each extending radially along a radius of said first disc, an equal distance from a central boss connection, and said second disc fan blade connecting segments each extending radially, parallel with a radius of said second disc, an equal distance from an open center core, each pair of adjacent first disc fan blade connecting segments defining a V- shaped hollow space, and each pair of adjacent second disc fan blade connecting segments defining a V-shaped hollow space, said annular ring of said seal disc dimensioned to cover each said V-shaped hollow space defined by said each pair of second disc fan blade connecting segments.
NZ758350A 2018-04-23 Cooling tower axial fan in a hollowed disc/ring configuration NZ758350B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201762488303P 2017-04-21 2017-04-21
PCT/US2018/028884 WO2018195539A1 (en) 2017-04-21 2018-04-23 Cooling tower axial fan in a hollowed disc/ring configuration
US15/959,998 US10808717B2 (en) 2017-04-21 2018-04-23 Cooling towers axial fan in a hollowed disc/ring configuration

Publications (2)

Publication Number Publication Date
NZ758350A NZ758350A (en) 2024-03-22
NZ758350B2 true NZ758350B2 (en) 2024-06-25

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