US20030123988A1 - Fan blades - Google Patents

Fan blades Download PDF

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Publication number
US20030123988A1
US20030123988A1 US10/160,785 US16078502A US2003123988A1 US 20030123988 A1 US20030123988 A1 US 20030123988A1 US 16078502 A US16078502 A US 16078502A US 2003123988 A1 US2003123988 A1 US 2003123988A1
Authority
US
United States
Prior art keywords
blades
fan blades
present
fan
noise
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.)
Abandoned
Application number
US10/160,785
Other languages
English (en)
Inventor
Jason Wen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20030123988A1 publication Critical patent/US20030123988A1/en
Abandoned 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
    • F04D29/66—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
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • 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
    • F05D2240/307—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 tip of a rotor blade

Definitions

  • the present invention relates to a set of fan blades, particularly to a set of fan blades delivering increased air pressure at reduced noise for better usability.
  • a fan has blades 10 moving through air 20 .
  • air 20 splits into an upper stream 21 and a lower stream 22 , which are combined again at a rear edge 12 of the blade 10 . Since the way from the front edge 11 to a rear edge 12 is longer for the upper stream 11 than for the lower stream 22 , the upper stream 11 flows faster than the lower stream 22 , according to Bernoulli's law generating under pressure on the upper side of the fan blade 10 and consequently a dynamic lift.
  • FIG. 1 is a perspective view of the set of fan blades of the present invention.
  • FIG. 2 is a top view of the set of fan blades of the present invention.
  • FIG. 3 is a sectional view along line 3 - 3 of FIG. 2.
  • FIG. 4 is diagram illustrating experimental data with regard to static pressure with respect to airflow rate for the present invention and two conventional fan blades respectively.
  • FIG. 5 is a schematic illustration of air currents around a conventional fan blade.
  • FIG. 6 is a perspective schematic illustration of vortices at a conventional set of fan blades.
  • the present invention is a set of fan blades 30 comprising a plurality of blades 32 evenly distributed around a hub case 31 .
  • Each of the blades 32 has an outer edge 321 from which a projection 322 extends away at an angle ⁇ . Since the projection 322 points upward, no vortices are generated at the outer edge 321 so that more effective operation at a lower noise is achieved.
  • the present invention achieves the object of lower noise and more effective operation for better dissipation of heat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US10/160,785 2001-12-31 2002-06-03 Fan blades Abandoned US20030123988A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW090224133 2001-12-31
TW090224133U TW585227U (en) 2001-12-31 2001-12-31 Improved structure for fan blade

Publications (1)

Publication Number Publication Date
US20030123988A1 true US20030123988A1 (en) 2003-07-03

Family

ID=21688003

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/160,785 Abandoned US20030123988A1 (en) 2001-12-31 2002-06-03 Fan blades

Country Status (3)

Country Link
US (1) US20030123988A1 (zh)
DE (1) DE20208410U1 (zh)
TW (1) TW585227U (zh)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060200445A1 (en) * 2005-03-03 2006-09-07 Google, Inc. Providing history and transaction volume information of a content source to users
US20060257251A1 (en) * 2005-05-10 2006-11-16 Carlson Jeremy S Rotary axial fan assembly
US20070154309A1 (en) * 2005-12-29 2007-07-05 Minebea Co., Ltd. Cooling fan with integral housing and impeller
US20070237656A1 (en) * 2006-04-11 2007-10-11 Pipkorn Nicholas T Rotary fan with encapsulated motor assembly
US20080093860A1 (en) * 2004-11-30 2008-04-24 Masahiko Suzuki Propeller And Horizontal-Axis Wind Turbine
US20080253896A1 (en) * 2007-04-13 2008-10-16 Walls Gary C High efficiency fan blades with airflow-directing baffle elements
US7438522B2 (en) 2003-04-19 2008-10-21 Ebm-Papst St. Georgen Gmbh & Co. Kg Fan
EP2199620A2 (en) 2008-12-22 2010-06-23 Sanyo Denki Co., Ltd. Axial flow fan
DE102010034604A1 (de) * 2010-08-13 2012-02-16 Ziehl-Abegg Ag Flügelrad für einen Ventilator
US20170257007A1 (en) * 2014-09-08 2017-09-07 Siemens Aktiengesellschaft Generator for a power plant
CN108087327A (zh) * 2017-12-12 2018-05-29 无锡市盛源汽车配件厂 高强度加固型汽车水泵叶轮
US20180258947A1 (en) * 2017-03-10 2018-09-13 Nidec Corporation Axial fan

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11965522B2 (en) 2015-12-11 2024-04-23 Delta Electronics, Inc. Impeller
USD804647S1 (en) 2016-02-02 2017-12-05 Delta Electronics, Inc. Fan blade
CN112459962B (zh) * 2020-11-23 2021-11-02 重庆交通大学绿色航空技术研究院 一种带有叶尖端板的风电叶片

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222710A (en) * 1976-12-20 1980-09-16 Kabushiki Kaisha Toyota Chuo Kenkyusho Axial flow fan having auxiliary blade
US5193983A (en) * 1991-08-05 1993-03-16 Norm Pacific Automation Corp. Axial-flow fan-blade with profiled guide fins
US5445215A (en) * 1992-12-22 1995-08-29 Herbert; Edward Fan assembly with heat sink
US5564901A (en) * 1993-12-14 1996-10-15 The Moore Company Low noise fan
US6352408B1 (en) * 2000-10-16 2002-03-05 Robert B. Kilian Slip inhibiting boat propeller
US6375427B1 (en) * 2000-04-14 2002-04-23 Borgwarner Inc. Engine cooling fan having supporting vanes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222710A (en) * 1976-12-20 1980-09-16 Kabushiki Kaisha Toyota Chuo Kenkyusho Axial flow fan having auxiliary blade
US5193983A (en) * 1991-08-05 1993-03-16 Norm Pacific Automation Corp. Axial-flow fan-blade with profiled guide fins
US5445215A (en) * 1992-12-22 1995-08-29 Herbert; Edward Fan assembly with heat sink
US5564901A (en) * 1993-12-14 1996-10-15 The Moore Company Low noise fan
US6375427B1 (en) * 2000-04-14 2002-04-23 Borgwarner Inc. Engine cooling fan having supporting vanes
US6352408B1 (en) * 2000-10-16 2002-03-05 Robert B. Kilian Slip inhibiting boat propeller

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7438522B2 (en) 2003-04-19 2008-10-21 Ebm-Papst St. Georgen Gmbh & Co. Kg Fan
US8128338B2 (en) * 2004-11-30 2012-03-06 Kabushiki Kaisha Bellsion Propeller and horizontal-axis wind turbine
US20080093860A1 (en) * 2004-11-30 2008-04-24 Masahiko Suzuki Propeller And Horizontal-Axis Wind Turbine
EP1832744B1 (en) * 2004-11-30 2019-09-18 NTN Corporation Propeller and horizontal-shaft windmill
US20060200445A1 (en) * 2005-03-03 2006-09-07 Google, Inc. Providing history and transaction volume information of a content source to users
US20060257251A1 (en) * 2005-05-10 2006-11-16 Carlson Jeremy S Rotary axial fan assembly
US7484925B2 (en) 2005-05-10 2009-02-03 Emp Advanced Development, Llc Rotary axial fan assembly
US20070154309A1 (en) * 2005-12-29 2007-07-05 Minebea Co., Ltd. Cooling fan with integral housing and impeller
US20070237656A1 (en) * 2006-04-11 2007-10-11 Pipkorn Nicholas T Rotary fan with encapsulated motor assembly
US20080253896A1 (en) * 2007-04-13 2008-10-16 Walls Gary C High efficiency fan blades with airflow-directing baffle elements
EP2199620A2 (en) 2008-12-22 2010-06-23 Sanyo Denki Co., Ltd. Axial flow fan
US8770943B2 (en) 2008-12-22 2014-07-08 Sanyo Denki Co., Ltd. Axial flow fan
US20100158677A1 (en) * 2008-12-22 2010-06-24 Sanyo Denki Co., Ltd. Axial flow fan
DE102010034604A1 (de) * 2010-08-13 2012-02-16 Ziehl-Abegg Ag Flügelrad für einen Ventilator
US8915717B2 (en) 2010-08-13 2014-12-23 Ziehl-Abegg Ag Impeller wheel for a ventilator
US20170257007A1 (en) * 2014-09-08 2017-09-07 Siemens Aktiengesellschaft Generator for a power plant
US20180258947A1 (en) * 2017-03-10 2018-09-13 Nidec Corporation Axial fan
CN108087327A (zh) * 2017-12-12 2018-05-29 无锡市盛源汽车配件厂 高强度加固型汽车水泵叶轮

Also Published As

Publication number Publication date
TW585227U (en) 2004-04-21
DE20208410U1 (de) 2002-10-02

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Legal Events

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STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION