WO2018107883A1 - 离心风叶及离心风机 - Google Patents

离心风叶及离心风机 Download PDF

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Publication number
WO2018107883A1
WO2018107883A1 PCT/CN2017/106028 CN2017106028W WO2018107883A1 WO 2018107883 A1 WO2018107883 A1 WO 2018107883A1 CN 2017106028 W CN2017106028 W CN 2017106028W WO 2018107883 A1 WO2018107883 A1 WO 2018107883A1
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WIPO (PCT)
Prior art keywords
blade
interference
centrifugal fan
centrifugal
groove
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.)
Ceased
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PCT/CN2017/106028
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English (en)
French (fr)
Inventor
田雅颂
李建建
熊军
吴俊鸿
李大伟
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.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to EP17881703.7A priority Critical patent/EP3557075B1/en
Priority to US16/468,470 priority patent/US11204040B2/en
Publication of WO2018107883A1 publication Critical patent/WO2018107883A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F04D29/26—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
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • 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
    • F05D2240/303—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 leading edge of a rotor blade
    • 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
    • F05D2250/294—Three-dimensional machined; miscellaneous grooved

Definitions

  • the invention relates to the field of centrifugal fans, and in particular to a centrifugal fan blade and a centrifugal fan.
  • the gas dynamics simulation of the blade shows that the maximum broadband noise is at the leading edge of the blade.
  • the structure is thin and pointed, and it is easy to generate large broadband noise after being impacted by high-speed airflow.
  • the present invention aims to provide a centrifugal vane and a centrifugal fan capable of reducing noise.
  • the present invention provides a centrifugal blade comprising a plurality of blades, at least a portion of which is provided with an interference groove on a leading edge of the blade, the interference groove extending in a width direction of the blade.
  • the interference groove is a V-shaped groove.
  • the apex angle of the V-shaped groove is ⁇ , wherein 30° ⁇ ⁇ ⁇ 85°.
  • the groove depth of the V-shaped groove along the radial direction of the centrifugal blade is h, wherein 0 mm ⁇ h ⁇ 3 mm
  • a plurality of interference grooves are provided on each of the blades.
  • the distance between two adjacent interference grooves is d, wherein 0 mm ⁇ d ⁇ 1 mm.
  • interference slots are three, and the three interference slots are evenly distributed on the leading edge of the blade.
  • the present invention also provides a centrifugal fan comprising the aforementioned centrifugal vane.
  • the interference groove extending along the width direction of the blade on the leading edge of the blade, when the blade is running, the interference groove changes the noise frequency, thereby preventing the front edge of the blade from being impacted by the high-speed airflow. Produces large broadband noise, which in turn reduces noise.
  • Figure 1 is a perspective view showing the structure of a centrifugal blade according to the present invention.
  • Figure 2 is a schematic perspective view of a blade according to the present invention.
  • Figure 3 is a front elevational view showing the centrifugal vane according to the present invention.
  • Figure 4 is a partial enlarged view of the reference numeral A in Figure 3;
  • Figure 5 is a schematic illustration of the size of the enlarged view of the portion shown in Figure 4.
  • the centrifugal vane according to the present invention includes a plurality of vanes 10, and the vane leading edge 11 of at least a portion of the vanes 10 is provided with an interference groove 11a extending in the width direction of the vane 10.
  • all the blades 10 may be provided with interference grooves 11a; or only portions may be provided, for example, spaced; or different numbers or types of interference grooves 11a may be disposed on different blades 10, and arranged according to a certain regularity.
  • the interference groove 11a extending in the width direction of the blade 10 is provided on the leading edge 11 of the blade, and the interference groove 11a is a groove structure which is arranged according to a certain shape or regularity.
  • the interference groove 11a is a V-shaped groove, which can more effectively prevent the generation of wide-screen noise, thereby more effectively reducing the noise decibel.
  • the apex angle 0 of the V-shaped groove is ⁇ , and when the value of ⁇ ranges from 30° ⁇ ⁇ ⁇ 85°, the effect of reducing noise is more obvious.
  • the groove depth of the V-shaped groove is h, and when the value range of h is 0 mm ⁇ h ⁇ 3 mm, the noise reduction effect is ensured, and the processing is convenient.
  • a plurality of interference grooves 11a may be disposed on each of the blades, and the plurality of interference grooves 11a are arranged to form a zigzag structure, which is more favorable for reducing noise.
  • the distance between two adjacent interference grooves 11a is d, wherein 0 mm ⁇ d ⁇ 1 mm, and the noise reduction effect is better.
  • the interference grooves 11a are three, and the three interference grooves 11a are evenly distributed on the leading edge 11 of the blade.
  • the center of the rear disc is provided with a through hole 21, that is, a wheel center structure.
  • the hub 20 is upwardly raised, so that a sufficient space can be secured to the discharge machine.
  • the maximum broadband noise of conventional centrifugal blades is mostly distributed at the tip of the fine tip. At a certain speed, the maximum broadband noise is 65.0 dB. With the design of the above embodiment, At the same speed, the maximum frequency noise is 61.2dB, which is 3.8dB lower than that of conventional centrifugal blades.
  • the present invention also provides a centrifugal fan comprising the aforementioned centrifugal vane to effectively reduce noise.
  • the interference groove 11a extending in the width direction of the blade 10 on the leading edge 11 of the blade, the interference groove 11a changes the noise frequency when the blade is operated, thereby preventing the leading edge 11 of the blade It is subjected to high-speed airflow and generates large broadband noise, which effectively reduces noise.

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

Abstract

一种离心风叶及离心风机，包括多个叶片（10），至少部分叶片（10）的叶片前缘（11）上设置有干扰槽（11a），干扰槽（11a）沿叶片（10）的宽度方向延伸。通过在叶片前缘（11）上设置沿叶片（10）的宽度方向延伸的干扰槽（11a），风叶运行时，干扰槽（11a）改变噪音频率，从而防止叶片前缘（11）处受高速气流冲击后产生较大的宽频噪声，进而有效降低噪音。

Description

离心风叶及离心风机 技术领域
本发明涉及离心风机领域，具体而言，涉及一种离心风叶及离心风机。
背景技术
具有离心风叶的装置在运行时，气体流动过程中会发生相互碰撞，气体与物体亦会发生碰撞，从而产生空气动力噪声，影响人们日常的工作、学习等。
对风叶进行气体动力学仿真计算，可发现其宽频噪声最大值在叶前缘处。该处结构呈细尖状，受高速气流冲击后容易产生较大的宽频噪声。
发明内容
本发明旨在提供一种能够降低噪音的离心风叶及离心风机。
本发明提供了一种离心风叶，包括多个叶片，至少部分叶片的叶片前缘上设置有干扰槽，干扰槽沿叶片的宽度方向延伸。
进一步地，干扰槽为V形槽。
进一步地，V形槽的顶角为α，其中，30°≤α≤85°。
进一步地，V形槽的沿离心风叶的径向的槽深为h，其中，0mm＜h≤3mm
进一步地，每个叶片上设置有多个干扰槽。
进一步地，相邻两个干扰槽之间的距离为d，其中，0mm＜d≤1mm。
进一步地，干扰槽为三个，三个干扰槽均匀分布在叶片前缘上。
本发明还提供了一种离心风机，包括前述的离心风叶。
根据本发明的离心风叶及离心风机，通过在叶片前缘上设置沿叶片的宽度方向延伸的干扰槽，风叶运行时，干扰槽改变噪音频率，从而防止叶片前缘处受高速气流冲击后产生较大的宽频噪声，进而有效降低噪音。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限 定。在附图中：
图1是根据本发明的离心风叶的立体结构示意图；
图2是根据本发明的叶片的立体结构示意图；
图3是根据本发明的离心风叶的主视结构示意图；
图4是图3中标号A处的局部放大图；
图5是图4所示局部放大图的尺寸标示示意图。
附图标记说明：
10、叶片；11、叶片前缘；11a、干扰槽；
20、轮毂；21、通孔。
具体实施方式
下面将参考附图并结合实施例来详细说明本发明。
如图1至5所示，根据本发明的离心风叶，包括多个叶片10，至少部分叶片10的叶片前缘11上设置有干扰槽11a，干扰槽11a沿叶片10的宽度方向延伸。在具体设置过程中，可以所有叶片10均设置干扰槽11a；也可以只设置部分，例如间隔设置；也可以不同的叶片10上设置不同数量或种类的干扰槽11a，并按照一定规律排列。本发明通过在叶片前缘11上设置沿叶片10的宽度方向延伸的干扰槽11a，干扰槽11a即为按照一定形状或者规律设置的槽结构，在风叶运行时，气流在干扰槽11a处受到干扰，从而改变噪音频率，进而防止叶片前缘11处受高速气流冲击后产生较大的宽频噪声，有效降低噪音。
优选地，干扰槽11a为V形槽，能够更有效地防止产生宽屏噪音，从而更有效地降低噪音分贝。优选地，V形槽的顶角0为α，当α的取值范围为30°≤α≤85°时，降低噪音的效果更明显。另外，V形槽的槽深为h，当h的取值范围为0mm＜h≤3mm，既能保证降噪效果，又方便加工。
结合图4和图5所示，每个叶片上可以设置多个干扰槽11a，多个干扰槽11a相互排列形成锯齿状结构，更有利于降低噪音。优选地，相邻两个干扰槽11a之间的距离为d，其中，0mm＜d≤1mm，降噪效果更优。在图4所示的具体实施例中，干扰槽11a为三个，三个干扰槽11a均匀分布在叶片前缘11上。
在本发明实施例中，后盘中心开有通孔21，即轮心结构，如图1所示，轮毂20向上凸起，这样能保证足够的空间安放电机。
根据气体动力学进行仿真计算，常规离心风叶的宽频噪声最大值大多分布在细尖形前缘部位，在特定转速下，其宽频噪声最大值达到了65.0dB；采用上述实施例的设计，在相同转速下，频噪声最大值为61.2dB，较常规离心风叶下降3.8dB。
本发明还提供了一种离心风机，包括前述的离心风叶，从而有效降低噪音。
从以上的描述中，可以看出，本发明上述的实施例实现了如下技术效果：
根据本发明的离心风叶及离心风机，通过在叶片前缘11上设置沿叶片10的宽度方向延伸的干扰槽11a，风叶运行时，干扰槽11a改变噪音频率，从而防止叶片前缘11处受高速气流冲击后产生较大的宽频噪声，进而有效降低噪音。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (8)

  1. 一种离心风叶，包括多个叶片(10)，其特征在于，至少部分所述叶片(10)的叶片前缘(11)上设置有干扰槽(11a)，所述干扰槽(11a)沿所述叶片(10)的宽度方向延伸。
  2. 根据权利要求1所述的离心风叶，其特征在于，
    所述干扰槽(11a)为V形槽。
  3. 根据权利要求2所述的离心风叶，其特征在于，
    所述V形槽的顶角为α，其中，30°≤α≤85°。
  4. 根据权利要求2所述的离心风叶，其特征在于，
    所述V形槽的沿所述离心风叶的径向的槽深为h，其中，0mm＜h≤3mm。
  5. 根据权利要求1所述的离心风叶，其特征在于，
    每个所述叶片(10)上设置有多个所述干扰槽(11a)。
  6. 根据权利要求5所述的离心风叶，其特征在于，
    相邻两个所述干扰槽(11a)之间的距离为d，其中，0mm＜d≤1mm。
  7. 根据权利要求5所述的离心风叶，其特征在于，
    所述干扰槽(11a)为三个，三个所述干扰槽(11a)均匀分布在叶片前缘(11)上。
  8. 一种离心风机，其特征在于，包括权利要求1至7中任一项所述的离心风叶。
PCT/CN2017/106028 2016-12-16 2017-10-13 离心风叶及离心风机 Ceased WO2018107883A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17881703.7A EP3557075B1 (en) 2016-12-16 2017-10-13 Centrifugal fan blade and centrifugal fan
US16/468,470 US11204040B2 (en) 2016-12-16 2017-10-13 Centrifugal fan blade assembly and centrifugal fan

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CN201611169462.1A CN106762816A (zh) 2016-12-16 2016-12-16 离心风叶及离心风机
CN201611169462.1 2016-12-16

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US20200072233A1 (en) 2020-03-05

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