CN102086887A - 轴流风扇 - Google Patents

轴流风扇 Download PDF

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Publication number
CN102086887A
CN102086887A CN2009103110623A CN200910311062A CN102086887A CN 102086887 A CN102086887 A CN 102086887A CN 2009103110623 A CN2009103110623 A CN 2009103110623A CN 200910311062 A CN200910311062 A CN 200910311062A CN 102086887 A CN102086887 A CN 102086887A
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China
Prior art keywords
axial fan
flabellum
boss
outer end
fan
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CN2009103110623A
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Inventor
叶东昌
杨之亚
索雪连
李应良
叶松林
林永彬
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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Application filed by Hong Jun Precision Industry Co ltd, Fuzhun Precision Industry Shenzhen Co Ltd filed Critical Hong Jun Precision Industry Co ltd
Priority to CN2009103110623A priority Critical patent/CN102086887A/zh
Priority to US12/697,305 priority patent/US8251669B2/en
Publication of CN102086887A publication Critical patent/CN102086887A/zh
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades
    • F04D29/384Blades characterised by form
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps

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

Abstract

一种轴流风扇,包括一转子,该转子包括一轮毂及环设于该轮毂外围的若干扇叶,每一扇叶包括一远离轮毂的一外端,该扇叶的外端的端面上朝向轴流风扇的旋转方向的前一扇叶凸设一凸台。该凸台于转子旋转时,可阻挡部分气流从扇叶的压力面侧泄漏至扇叶的外围,防止泄漏的气流于扇叶的外围形成涡流而成为噪音的重要来源。

Description

轴流风扇
技术领域
本发明涉及一种轴流风扇,特别涉及一种适用于发热电子元件散热的轴流风扇。
背景技术
随着电脑产业的迅速发展,CPU追求高速度化,多功能化及小型化所衍生的散热问题越来越严重,若不将热量及时有效地散发出去,则会极大地影响电子元件的工作性能,同时还会缩减电子元件的使用寿命。因此,业界通常在发热电子元件上贴设散热器并采用一轴流风扇对散热器吹风产生强制气流以加速散热,或直接采用一风扇对发热电子元件进行风冷散热。然而风扇在工作时会产生较大的噪音,且风扇的转速越高,噪音越大。有时为了控制风扇噪音而不得不牺牲风扇的转速,这样,使得风扇的散热性能相应地受到限制。
发明内容
有鉴于此,有必要提供一种可减小噪音的轴流风扇。
一种轴流风扇,包括一转子,该转子包括一轮毂及环设于该轮毂外围的若干扇叶,每一扇叶包括一远离轮毂的一外端,该扇叶的外端的端面上朝向轴流风扇的旋转方向的前一扇叶凸设一凸台。
与传统的轴流风扇相比,该轴流风扇的扇叶的外端上形成有凸台,该凸台于转子旋转时,可阻挡部分气流从扇叶的压力面侧泄漏至扇叶的外围,防止泄漏的气流于扇叶的外围形成涡流而成为噪音的重要来源。
附图说明
图1为本发明轴流风扇较佳实施方式的立体组合图。
图2为图1所示轴流风扇的立体分解图。
图3为图2所示轴流风扇的转子处于倒置状态的立体图。
图4为图3所示转子的扇叶的端面示意图。
主要元件符号说明
Figure G200910311062320091208D000011
具体实施方式
请参阅图1及图2,该轴流风扇100包括一扇框10及设于该扇框10内的定子20及转子30。该扇框10包括一方形中空框体12及设于该框体12一端的中央的一固定部14。该定子20安装于该固定部14上。该转子30可旋转地固定于该定子20上。该扇框10的轴向两端分别形成一入风口17及一出风口18,其中该出风口18形成于该框体12设有该固定部14的一端,该入风口17设于相对的另一端。
该转子30包括一轮毂32及自轮毂32外围呈放射状向外延伸的若干扇叶34。每一扇叶34相对该轮毂32中心的轴线倾斜设置,每一扇叶34包括一面朝入风口17的吸力面341及面朝出风口18的一压力面342。每一扇叶34包括与轮毂32的外侧面连接的一内端343及远离轮毂32的一外端344。所有扇叶34的外端344的端面348共同位于一假想的圆周上,该假想的圆周与轮毂32共轴心。该转子30装配于该扇框10内后,该扇叶34的外端344与扇框10的框体12内壁之间形成一间隙19。
请同时参阅图3及图4,该扇叶34的外端344的端面348沿轴向呈翼型。从该扇叶34的外端344的端面348可以看出,沿轮毂32的轴向上,该扇叶34的厚度从其中间向上下两端逐渐减小。该扇叶34于入风口17侧形成一光滑的上缘345,该上缘345为每一扇叶34中气流从入风口17进入扇框10后最先接触的部分。该扇叶34于出风口18侧形成一尖锐的下缘346,该下缘346为每一扇叶34中气流从扇框10流出时最后接触的部分。每一扇叶34的上缘345的厚度大于其下缘346的厚度。
每一扇叶34的外端344的端面348上于靠近下缘346处沿轴流风扇100的旋转方向朝前方的一扇叶34凸设一凸台349,该凸台349为一弧形片状体,从该外端344的端面348向相邻前方的一扇叶34所在方向延伸形成,该凸台349与该外端344的端面348相垂直。该凸台349位于所述外端344的端面348所在的假想圆周上,并顺沿该圆周方向朝向轴流风扇100的旋转方向的前一扇叶34凸伸。该凸台349凸出的宽度沿扇叶34轴向从中间向两端逐渐减小。该凸台349位于该扇叶34厚度最大的中间与下缘346之间,其长度小于或等于该扇叶34中间与下缘346之间的长度。本实施例中,该凸台349的长度小于该扇叶34厚度最大的中间与下缘346之间的长度,该凸台349设于该外端344的端面348接近下缘346的位置上。本实施例中,该凸台349呈弧形,事实上,该凸台349的形状不限于弧形,其也可为半圆形、方形或其他形状。
工作时,转子30相对定子20和扇框10高速旋转,所述扇叶34高速旋转将入风口17处进入的气流向下压并排向出风口18,如此便造成每一扇叶34的吸力面341侧的空气压力下降,而扇叶34的压力面342侧的空气压力上升,造成扇叶34的吸力面341和压力面342之间形成一气压差,使得压力面342侧的一部分气流有泄漏至所述吸力面341和压力面342的交界处,即泄漏至每一扇叶34的外端344与扇框10之间的间隙19处而形成涡流的趋势,一旦涡流在间隙19处形成,便会成为风扇运转时噪音的重要来源。该扇叶34的外端344上凸台349的设置一方面可以起到阻挡气流自扇叶34的压力面342侧泄漏至外端344与框体12之间的间隙19中,从而可以较好地阻止涡流的产生,达到减小噪音的目的;另一方面,在气流行进过程中从压力面342侧向吸力面341侧泄漏通常会在两侧之间气压差最大的地方更强,也就是每一扇叶34的外端344靠近下缘346处的地方,该凸台349可以补强该外端344靠近下缘346处的厚度,加长气流从压力面342泄漏至吸力面341的路径,将泄漏的气流分为相位不同的两部分气流,该两部分相位不同的气流相互抵消,从而抑制涡流的产生,进而降低转子30旋转时产生的噪音。

Claims (8)

1.一种轴流风扇,包括一转子,该转子包括一轮毂及环设于该轮毂外围的若干扇叶,每一扇叶包括一远离轮毂的一外端,其特征在于:该扇叶的外端的端面上朝向轴流风扇的旋转方向的前一扇叶凸设一凸台。
2.如权利要求1所述的轴流风扇,其特征在于:该凸台呈片状。
3.如权利要求2所述的轴流风扇,其特征在于:所有扇叶的外端的端面位于一假想的圆周上,所述凸台位于该圆周上并顺沿该圆周方向延伸。
4.如权利要求1所述的轴流风扇,其特征在于:该凸台凸出的宽度沿中间向两端逐渐减小。
5.如权利要求4所述的轴流风扇,其特征在于:该凸台为一弧形片状体。
6.如权利要求1所述的轴流风扇,其特征在于:该凸台与该扇叶的外端的端面相垂直。
7.如权利要求1至6任意一项所述的轴流风扇,其特征在于:该轴流风扇的轴向两侧分别形成一入风口及一出风口,该扇叶于该入风口侧的一端形成一上缘,该扇叶于该出风口侧的一端形成一下缘,沿轴流风扇的轴向上,该外端的厚度从中间分别向上缘和下缘逐渐减小,所述凸台设于该外端厚度最大的中间与下缘之间。
8.如权利要求7所述的轴流风扇,其特征在于:所述凸台设于该外端的端面接近下缘的位置上。
CN2009103110623A 2009-12-08 2009-12-08 轴流风扇 Pending CN102086887A (zh)

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CN2009103110623A CN102086887A (zh) 2009-12-08 2009-12-08 轴流风扇
US12/697,305 US8251669B2 (en) 2009-12-08 2010-02-01 Cooling fan

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CN2009103110623A CN102086887A (zh) 2009-12-08 2009-12-08 轴流风扇

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244438A (zh) * 2011-06-14 2011-11-16 许晓华 一种转子绝缘片
CN103775354A (zh) * 2012-10-23 2014-05-07 建准电机工业股份有限公司 散热风扇
CN113803279A (zh) * 2020-06-12 2021-12-17 日本电产株式会社 轴流风扇

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215441A (en) * 1991-11-07 1993-06-01 Carrier Corporation Air conditioner with condensate slinging fan
US20020182071A1 (en) * 2001-05-29 2002-12-05 Belady Christian L. Enhanced performance fan with the use of winglets
CN2533305Y (zh) * 2002-01-31 2003-01-29 谢新茂 一种轴流电扇
US20050180849A1 (en) * 2004-02-18 2005-08-18 Te-Fu Chen Axial flow fan

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017226A1 (de) * 1979-05-12 1980-11-20 Papst Motoren Kg Ventilatorlaufrad

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215441A (en) * 1991-11-07 1993-06-01 Carrier Corporation Air conditioner with condensate slinging fan
US20020182071A1 (en) * 2001-05-29 2002-12-05 Belady Christian L. Enhanced performance fan with the use of winglets
CN2533305Y (zh) * 2002-01-31 2003-01-29 谢新茂 一种轴流电扇
US20050180849A1 (en) * 2004-02-18 2005-08-18 Te-Fu Chen Axial flow fan

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244438A (zh) * 2011-06-14 2011-11-16 许晓华 一种转子绝缘片
CN103775354A (zh) * 2012-10-23 2014-05-07 建准电机工业股份有限公司 散热风扇
CN103775354B (zh) * 2012-10-23 2016-08-31 建准电机工业股份有限公司 散热风扇
CN113803279A (zh) * 2020-06-12 2021-12-17 日本电产株式会社 轴流风扇

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US8251669B2 (en) 2012-08-28

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Application publication date: 20110608