US20100150731A1 - Fan blades - Google Patents

Fan blades Download PDF

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Publication number
US20100150731A1
US20100150731A1 US12/635,665 US63566509A US2010150731A1 US 20100150731 A1 US20100150731 A1 US 20100150731A1 US 63566509 A US63566509 A US 63566509A US 2010150731 A1 US2010150731 A1 US 2010150731A1
Authority
US
United States
Prior art keywords
blade
edge portion
pressure balance
holes
back edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/635,665
Other languages
English (en)
Inventor
Da Zhang
Yuqi Chen
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.)
Zhongshan Broad Ocean Motor Co Ltd
Original Assignee
Zhongshan Broad Ocean Motor Co Ltd
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 Zhongshan Broad Ocean Motor Co Ltd filed Critical Zhongshan Broad Ocean Motor Co Ltd
Assigned to ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD. reassignment ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, YUQI, ZHANG, DA
Publication of US20100150731A1 publication Critical patent/US20100150731A1/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
    • F04D29/26—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
    • 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
    • F04D29/289—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps having provision against erosion or for dust-separation
    • 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
    • F04D29/30—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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/682—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid extraction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/684—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid injection

Definitions

  • the invention relates to a blade for an axial fan and a blade for a centrifugal fan.
  • a conventional blade for an axial fan comprises a front edge portion and a back edge portion.
  • the front edge portion operates to blow air from the outside of the blade
  • the back edge portion operates to blow air to the outside of the blade.
  • problems with the blade as the blade rotates, the airflow at the back edge portion is affected with increase of rotary kinetic energy, as a result, separation of boundary layer airflow causes a backflow phenomena when the airflow is discharged from the back edge portion, which increases power consumption and noise, and a great deal of dust is settled on the back edge portion on a windward side of the blade.
  • a blade for an axial fan comprising a front edge portion, a back edge portion, and multiple pressure balance holes.
  • the front edge portion operates to blow air from the outside of the blade
  • the back edge portion operates to blow air to the outside of the blade
  • the pressure balance hole is disposed on the back edge portion.
  • the pressure balance holes are distributed in an array, uniformly or randomly.
  • the pressure balance holes are straight through holes or inclined through holes.
  • the pressure balance holes form a hole net whereby adjusting pressure on both side of the blade.
  • a diameter of the pressure balance hole ranges from 0.1 mm to 100 mm.
  • the pressure balance hole is a circular hole or a non-circular hole.
  • a blade for a centrifugal fan comprising a front edge portion, a back edge portion, and multiple pressure balance holes.
  • the front edge portion operates to blow air from the outside of the blade
  • the back edge portion operates to blow air to the outside of the blade
  • the pressure balance hole is disposed on the back edge portion.
  • the pressure balance holes are distributed in an array, uniformly or randomly.
  • the pressure balance holes are straight through holes or inclined through holes.
  • the pressure balance holes form a hole net whereby adjusting pressure on both side of the blade.
  • a diameter of the pressure balance hole ranges from 0.1 mm to 100 mm.
  • the pressure balance hole is a circular hole or a non-circular hole.
  • the blade for an axial fan of the invention comprise: 1) the pressure balance holes disposed on the back edge portion are capable of balancing pressure and reducing pressure difference between a front side and a back side of the blade; 2) the pressure balance holes are capable of eliminating a backflow phenomena caused by separation of boundary layer airflow at the back edge portion on a windward side of the blade and thus reducing power consumption and noise; 3) the pressure balance holes are capable of preventing dust from being settled on a back edge portion on a windward side of the blade.
  • the blade for a centrifugal fan of the invention comprise: 1) the pressure balance holes disposed on the back edge portion are capable of balancing pressure and reducing pressure difference between a front side and a back side of the blade; 2) the pressure balance holes are capable of eliminating a backflow phenomena caused by separation of boundary layer airflow at the back edge portion on a windward side of the blade and thus reducing power consumption and noise; 3) the pressure balance holes are capable of preventing dust from being settled on a back edge portion on a windward side of the blade.
  • FIG. 1 is a schematic view of an axial fan in the prior art
  • FIG. 2 is a schematic view of a blade for an axial fan of an exemplary embodiment of the invention
  • FIG. 3 illustrates an application of an axial fan of an exemplary embodiment of the invention
  • FIG. 4 is a schematic view of a centrifugal fan of another exemplary embodiment of the invention.
  • FIG. 5 is a schematic view of a blade for a centrifugal fan of another exemplary embodiment of the invention.
  • a blade for an axial fan of the invention comprises a front edge portion 1 , a back edge portion 2 , and multiple pressure balance holes 3 .
  • the front edge portion 1 operates to blow air from the outside of the blade
  • the back edge portion 2 operates to blow air to the outside of the blade
  • the pressure balance hole 3 is disposed on the back edge portion 2 .
  • the pressure balance holes 3 are distributed in an array, uniformly or randomly.
  • the pressure balance holes 3 are circular holes, non-circular holes, straight through holes or inclined through holes, and a diameter of each of the pressure balance holes 3 ranges from 0.1 mm to 100 mm.
  • the pressure balance holes 3 form a hole net whereby adjusting pressure on both side of the blade.
  • the pressure balance holes 3 are capable of balancing pressure and reducing pressure difference between a front side and a back side of the blade, eliminating a backflow phenomena caused by separation of boundary layer airflow at the back edge portion 2 on a windward side 4 of the blade and thus reducing power consumption and noise, and preventing dust from being settled on the back edge portion 2 on the windward side 4 of the blade.
  • a blade for a centrifugal fan of the invention comprises a front edge portion 1 , a back edge portion 2 , and multiple pressure balance holes 3 .
  • the front edge portion 1 operates to blow air from the outside of the blade
  • the back edge portion 2 operates to blow air to the outside of the blade
  • the pressure balance hole 3 is disposed on the back edge portion 2 .
  • the pressure balance holes 3 are distributed in an array, uniformly or randomly.
  • the pressure balance holes 3 are circular holes, non-circular holes, straight through holes or inclined through holes, and a diameter of each of the pressure balance holes 3 ranges from 0.1 mm to 100 mm.
  • the pressure balance holes 3 form a hole net whereby adjusting pressure on both side of the blade.
  • the pressure balance holes 3 are capable of balancing pressure and reducing pressure difference between a front side and a back side of the blade, eliminating a backflow phenomena caused by separation of boundary layer airflow at the back edge portion 2 on a windward side 4 of the blade and thus reducing power consumption and noise, and preventing dust from being settled on the back edge portion 2 on the windward side 4 of the blade.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US12/635,665 2008-11-28 2009-12-10 Fan blades Abandoned US20100150731A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200810219647 2008-11-28
CN200810187034.0 2008-12-11
CNA2008101870340A CN101440822A (zh) 2008-11-28 2008-12-11 一种轴流风扇及离心风扇的风叶

Publications (1)

Publication Number Publication Date
US20100150731A1 true US20100150731A1 (en) 2010-06-17

Family

ID=40725382

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/635,665 Abandoned US20100150731A1 (en) 2008-11-28 2009-12-10 Fan blades

Country Status (3)

Country Link
US (1) US20100150731A1 (it)
CN (1) CN101440822A (it)
IT (1) IT1396643B1 (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705264A (zh) * 2012-06-15 2012-10-03 美的集团有限公司 一种轴流风轮
CN103527516A (zh) * 2013-11-01 2014-01-22 赵瑞华 无噪声倍效节能轴流系列风机
US20140271286A1 (en) * 2013-03-14 2014-09-18 William McNeill Noise Producing Fan
US20140301860A1 (en) * 2013-04-09 2014-10-09 MTU Aero Engines AG Airfoil having a profiled trailing edge for a fluid flow machine, blade, and integrally blade rotor
WO2018158226A1 (de) * 2017-03-03 2018-09-07 Convotherm-Elektrogeräte Gmbh Lüfterrad
US11391282B2 (en) * 2019-02-28 2022-07-19 Ebm-Papst St. Georgen Gmbh & Co. Kg Axial ventilator having noise reducing fan wheel blades

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010066140A1 (zh) * 2008-12-11 2010-06-17 中山大洋电机股份有限公司 一种轴流风扇及离心风扇的风叶
CN102536898B (zh) * 2010-12-29 2014-10-22 台达电子工业股份有限公司 风扇及其叶轮
CN102003409A (zh) * 2010-12-30 2011-04-06 上海交通大学 用于络筒机离心风机的波纹状结构叶片
CN102644623A (zh) * 2012-04-16 2012-08-22 广东美的制冷设备有限公司 一种轴流风轮
CN102678586A (zh) * 2012-05-23 2012-09-19 浙江理工大学 一种叶片穿孔式无叶风扇涡轮装置
US20140124231A1 (en) 2012-11-06 2014-05-08 Milwaukee Electric Tool Corporation Electric motor for a power tool
US10432045B2 (en) 2012-11-06 2019-10-01 Milwaukee Electric Tool Corporation Electric motor for a power tool
CN103867468B (zh) * 2014-03-21 2015-12-16 宁波高新区金杉新能源科技有限公司 带空气净化的冷热型风扇
CN104454641B (zh) * 2014-11-13 2017-06-16 中国北车集团大连机车研究所有限公司 高速电力机车冷却系统用低噪轴流风机叶轮
CN107061357B (zh) * 2017-01-20 2019-10-18 美的集团股份有限公司 叶片、离心风机叶轮、离心风机和吸油烟机
CN107044442A (zh) * 2017-04-26 2017-08-15 朱晓义 一种产生更大推动力的风扇
KR102092293B1 (ko) * 2018-01-11 2020-03-23 엘지전자 주식회사 축류팬

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524949A (en) * 1975-07-02 1977-01-14 Hitachi Ltd Pump runner
US4714408A (en) * 1985-06-06 1987-12-22 Nissan Motor Co., Ltd. Radiator fan

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524949A (en) * 1975-07-02 1977-01-14 Hitachi Ltd Pump runner
US4714408A (en) * 1985-06-06 1987-12-22 Nissan Motor Co., Ltd. Radiator fan

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705264A (zh) * 2012-06-15 2012-10-03 美的集团有限公司 一种轴流风轮
US20140271286A1 (en) * 2013-03-14 2014-09-18 William McNeill Noise Producing Fan
US20140301860A1 (en) * 2013-04-09 2014-10-09 MTU Aero Engines AG Airfoil having a profiled trailing edge for a fluid flow machine, blade, and integrally blade rotor
EP2789798A3 (de) * 2013-04-09 2015-01-21 MTU Aero Engines GmbH Schaufelblatt für eine Strömungsmaschine mit Hinterkantenprofilierung, Schaufel und integral beschaufelter Rotor
US9657576B2 (en) * 2013-04-09 2017-05-23 MTU Aero Engines AG Airfoil having a profiled trailing edge for a fluid flow machine, blade, and integrally blade rotor
CN103527516A (zh) * 2013-11-01 2014-01-22 赵瑞华 无噪声倍效节能轴流系列风机
WO2018158226A1 (de) * 2017-03-03 2018-09-07 Convotherm-Elektrogeräte Gmbh Lüfterrad
US11391282B2 (en) * 2019-02-28 2022-07-19 Ebm-Papst St. Georgen Gmbh & Co. Kg Axial ventilator having noise reducing fan wheel blades

Also Published As

Publication number Publication date
CN101440822A (zh) 2009-05-27
ITMI20092129A1 (it) 2010-06-12
IT1396643B1 (it) 2012-12-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD.,CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZHANG, DA;CHEN, YUQI;REEL/FRAME:023658/0228

Effective date: 20090624

STCB Information on status: application discontinuation

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