CN202545352U - 叶片穿孔小型轴流风扇 - Google Patents

叶片穿孔小型轴流风扇 Download PDF

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Publication number
CN202545352U
CN202545352U CN2012201850086U CN201220185008U CN202545352U CN 202545352 U CN202545352 U CN 202545352U CN 2012201850086 U CN2012201850086 U CN 2012201850086U CN 201220185008 U CN201220185008 U CN 201220185008U CN 202545352 U CN202545352 U CN 202545352U
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fan
motor
blade
fixing frame
perforation
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Expired - Fee Related
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CN2012201850086U
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金英子
吴泳敏
张立
李博
张广星
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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    • 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
    • F04D29/26—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
    • 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

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

Abstract

本实用新型公开了一种叶片穿孔小型轴流风扇。现有的风扇虽比较好，但风扇叶片上升力脉动仍旧不稳定性。本实用新型包括机匣、电机固定架、电机、轮毂、穿孔叶片，穿孔叶片沿周向等间距安装在轮毂上，轮毂通过旋转轴与电机相连接，电机固定在电机固定架上，电机固定架固定在机匣内，穿孔叶片上开有三排圆孔，每排圆孔分别是4个、3个、4个，圆孔的分布区域位于风扇压力面压力较高且吸力面压力较低的区域，且第一排圆孔处于分离点前，圆孔的直径D与相邻两个圆孔之间的距离L的比值的取值范围为0.3～0.8。本实用新型能使出口区的涡流分离点向下游移动，减弱紊流强度，改进风扇气动性能、叶片上升力脉动的不稳定性，气动噪声辐射增加等缺点。

Description

叶片穿孔小型轴流风扇
技术领域
本实用新型属于散热风扇技术领域，尤其涉及一种叶片穿孔小型轴流风扇。 
背景技术
目前，计算机、电子仪器仪表等电子元器件通常采用小型轴流风扇作为散热部件。随着电气设备功率的不断增大，对高通风量低噪声的散热风扇需求越来越大。风扇叶片上升力脉动的不稳定性，增加气动噪声辐射，不仅浪费了能源也污染了环境。为此，迫切需要设计一种小型轴流风扇，使得在工况点处，不但没有导致风扇压升降低，而且使得噪声降低。 
发明内容
本实用新型的目的是针对现有技术的不足，提供一种叶片穿孔小型轴流风扇，来克服风扇叶片上升力脉动的不稳定性，气动噪声辐射增加的缺点。 
本实用新型包括机匣、电机固定架、电机、轮毂、穿孔叶片，穿孔叶片沿周向等间距安装在轮毂上，轮毂通过旋转轴与电机相连接，电机固定在电机固定架上，电机固定架固定在机匣内。 
所述的穿孔叶片上开有三排圆孔，每排圆孔分别是4个、3个、4个，圆孔的分布区域位于风扇压力面压力较高且吸力面压力较低的区域，且第一排圆孔处于分离点前，圆孔的直径D与相邻两个圆孔之间的距离L的比值的取值范围为0.3～0.8； 
本实用新型有益效果如下：
本实用新型能使出口区的涡流分离点向下游移动，减弱紊流强度，从而达到对小型轴流风扇气动性能改进，克服风扇叶片上升力脉动的不稳定性，气动噪声辐射增加的缺点。
附图说明
图1是本实用新型安装示意图； 
图2是原型叶片风扇与本实用新型P-Q性能曲线对比示意图；
图3是原型叶片风扇与本实用新型η-Q效率曲线对比示意图；
图4是原型叶片风扇与本实用新型在叶片顶端间隙和出口区离转子中心50mm处两个监测点处的声压值；
图中，机匣1、电机固定架2、电机3、轮毂4、穿孔叶片5。
具体实施方式
下面结合附图对本实用新型作进一步说明。 
如图1所示，一种叶片穿孔小型轴流风扇，包括机匣1、电机固定架2、电机3、轮毂4、穿孔叶片5，穿孔叶片5沿周向等间距安装在轮毂4上，轮毂4通过旋转轴与电机3相连接，电机3固定在电机固定架2上，电机固定架2固定在机匣1内。 
所述的穿孔叶片5上开有三排圆孔，每排圆孔分别是4个、3个、4个，圆孔的分布区域位于风扇压力面压力较高且吸力面压力较低的区域，且第一排圆孔处于分离点前，圆孔的直径D与相邻两个圆孔之间的距离L的比值的取值范围为0.3～0.8，在该范围内涡流消失点向下游移动，流场的紊流强度下降，出口处涡量减弱； 
所述的圆孔的排数、数量、直径及相邻两个圆孔之间距离大小可根据实际叶片上压力分布设计；
所述的叶片穿孔后，穿孔叶片5顶端间隙处和出口区的噪声都减小，涡脱落减少且脱落位置更靠近穿孔叶片5顶端，在出口区涡流消失点向下游移动，流场的紊流强度下降，在出口处涡量减弱，使噪声整体减小。如图2、图3所示，分别为原型叶片与穿孔叶片小型轴流风扇P-Q性能曲线和η-Q效率曲线。
在设计工况流量下，频率在27.5kHz～35kHz范围内，本实用新型的A级声压值比原型风扇的高；在其他的频率范围内，本实用新型的A级声压值都比原型风扇底。随着频率的增大，A级声压值的每个频率范围也增大，本实用新型和原型风扇两个风扇模型的每个频段范围都相同；在整个频率范围内，本实用新型的声压级范围比原型风扇的声压级范围小。本实用新型在不同频段的噪声降低幅度都不相同，在35kHz～45kHz频率范围内，噪声降低幅度最大，具体可参照图4，图4为原型叶片风扇与本实用新型在叶片顶端间隙和出口区离转子中心50mm处两个监测点处的声压值。 

Claims (1)

1. 叶片穿孔小型轴流风扇，包括机匣、电机固定架、电机、轮毂、穿孔叶片，其特征在于：
穿孔叶片沿周向等间距安装在轮毂上，轮毂通过旋转轴与电机相连接，电机固定在电机固定架上，电机固定架固定在机匣内；
所述的穿孔叶片上开有三排圆孔，每排圆孔分别是4个、3个、4个，圆孔的分布区域位于风扇压力面压力较高且吸力面压力较低的区域，且第一排圆孔处于分离点前，圆孔的直径D与相邻两个圆孔之间的距离L的比值的取值范围为0.3～0.8。
CN2012201850086U 2012-04-27 2012-04-27 叶片穿孔小型轴流风扇 Expired - Fee Related CN202545352U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635572A (zh) * 2012-04-27 2012-08-15 浙江理工大学 一种叶片穿孔小型轴流风扇
CN111043078A (zh) * 2019-12-31 2020-04-21 宁波奥克斯电气股份有限公司 一种轴流风叶和空调器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635572A (zh) * 2012-04-27 2012-08-15 浙江理工大学 一种叶片穿孔小型轴流风扇
CN111043078A (zh) * 2019-12-31 2020-04-21 宁波奥克斯电气股份有限公司 一种轴流风叶和空调器

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121121

Termination date: 20160427