WO2021051789A1 - 一种引风机 - Google Patents

一种引风机 Download PDF

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Publication number
WO2021051789A1
WO2021051789A1 PCT/CN2020/084029 CN2020084029W WO2021051789A1 WO 2021051789 A1 WO2021051789 A1 WO 2021051789A1 CN 2020084029 W CN2020084029 W CN 2020084029W WO 2021051789 A1 WO2021051789 A1 WO 2021051789A1
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WIPO (PCT)
Prior art keywords
volute
blade
rear wheel
top surface
edge portion
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PCT/CN2020/084029
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English (en)
French (fr)
Inventor
林炎虎
张淼
王鸿彬
郭烈维
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中山大洋电机股份有限公司
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Publication of WO2021051789A1 publication Critical patent/WO2021051789A1/zh

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • 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

Definitions

  • the utility model relates to an induced draft fan.
  • the structure of the existing induced draft fan is shown in Figure 1.
  • the inner wall surface 1 of the volute and the inner wall surface 2 of the volute are both flat.
  • the inner wall surface 3 of the volute is basically perpendicular to the inner wall surface 1 and has a circular cross section. The distance between them is constant, and the air outlet area of the wind wheel is also the same, resulting in low efficiency during the operation of the fan, and the air outlet area of the air flow from the outlet of the wind wheel suddenly increases, which will cause a large loss of airflow, and also cause airflow. Sudden changes in flow rate and pressure will cause surging and large rotating noise, the overall efficiency is low, and the noise and vibration of the whole machine will be caused.
  • the purpose of the utility model is to provide an induced draft fan, which solves the problem of the sudden increase in the air exit area of the air flow from the outlet of the wind wheel in the prior art, which will cause a large loss of air flow, and also cause sudden changes in the flow rate and pressure of the air flow.
  • causes surging and large rotating noise the overall efficiency is low, and causes technical problems of noise and vibration of the whole machine.
  • An induced draft fan includes a volute, a wind wheel and a motor.
  • the volute includes a volute shell and a cover plate installed at the bottom of the volute shell.
  • the volute shell and the cover plate enclose a wind wheel mountable In the inner cavity, the cover plate is provided with an air inlet, the side of the volute shell extends out of the exhaust duct, and the tail of the exhaust duct forms the volute exhaust outlet, which is recessed inward in the middle of the top of the volute shell to install the motor.
  • a volute tongue is arranged in the inner cavity near the exhaust duct, and the motor includes a rotating shaft. The front end of the rotating shaft of the motor extends into the inner cavity of the volute shell and is installed with the wind wheel.
  • the volute shell The middle of the top of the body is recessed inward so that the inner cavity forms a first top surface and a second top surface.
  • a flow channel is formed between the first top surface, the side surface and the cover plate.
  • the first top surface and the second top surface are both flat surfaces.
  • the tongue begins to turn along the wind wheel until the width L of the first top surface at the exhaust port of the volute gradually increases, so that the cross-sectional area of the flow channel gradually increases.
  • the above-mentioned wind wheel includes a rear wheel disc and a blade group.
  • a shaft mounting seat protrudes from the middle of the bottom surface of the rear wheel disc, and a shaft hole is arranged in the middle of the rear wheel disc.
  • the shaft hole extends into the mounting seat, and is located on the bottom surface of the rear wheel disc.
  • Several blade groups protrude, the blade groups are circumferentially spaced around the mounting seat, and an air duct is formed between two adjacent blade groups. The height of the air duct gradually changes from the center of the rear wheel to the edge of the rear wheel. Becomes high.
  • the aforementioned blade set includes a main blade and an auxiliary blade, the end of the auxiliary blade is connected to the middle section of the main blade, and the height of the air duct gradually increases from the end of the auxiliary blade to the air outlet of the blade.
  • the height H1 of the main blade of the above-mentioned blade group changes, gradually increasing from the middle section connecting the auxiliary blades to the air outlet of the blade.
  • the distance H2 from the bottom end of the above-mentioned blade group to the top surface of the rear wheel disc changes, and the distance H2 gradually increases from the center of the rear wheel disc to the edge of the rear wheel disc.
  • the rear disc between the main blades and auxiliary blades of the blade group is provided with a gap, and the area of the rear disc is larger than that of the second top.
  • the area of the face is provided with a gap.
  • the above-mentioned main blades protrude from the rear wheel disc to form a first outer edge portion, and the auxiliary blades protrude from the rear wheel disc to form a second outer edge portion.
  • the height H3 of the first outer edge portion and the second outer edge portion gradually increases.
  • the first outer edge portion and the second outer edge portion are located inside the flow channel.
  • the bottoms of the first outer edge portion and the second outer edge portion described above are also connected with a front baffle plate, and the front baffle plate and the rear wheel disc are respectively located on both sides of the blade group.
  • the utility model includes a volute, a wind wheel and a motor.
  • the volute includes a volute shell and a cover plate installed at the bottom of the volute shell.
  • the volute shell and the cover plate enclose a wind wheel that can be installed.
  • the cover plate is provided with an air inlet
  • the side of the volute shell extends out of the exhaust duct
  • the tail of the exhaust duct forms the volute exhaust outlet, which is recessed inward in the middle of the top of the volute shell to install the motor.
  • a volute tongue is arranged in the inner cavity near the exhaust duct, and the motor includes a rotating shaft. The front end of the rotating shaft of the motor extends into the inner cavity of the volute shell and is installed with the wind wheel.
  • volute shell The middle of the top of the body is recessed inward so that the inner cavity forms a first top surface and a second top surface.
  • a flow channel is formed between the first top surface, the side surface and the cover plate.
  • the first top surface and the second top surface are both flat surfaces.
  • the tongue begins to turn along the wind wheel until the width L of the first top surface at the exhaust outlet of the volute gradually increases, so that the cross-sectional area of the flow channel gradually becomes larger, that is, the cross-sectional area of the flow channel of the induced draft fan gradually becomes larger, so that The flow rate and pressure of the air flow are uniformly increased, reducing the pressure diffusion loss and vortex loss, improving the operating efficiency of the induced draft fan, reducing the rotating noise, reducing the impact of the air flow on the volute and reducing the vibration.
  • Figure 1 is a schematic diagram of the structure in the prior art
  • Figure 2 is a perspective view of the utility model
  • Figure 3 is another perspective view of the utility model
  • Figure 4 is a top view of the utility model
  • Figure 5 is a cross-sectional view of A-A in Figure 4.
  • Figure 6 is a schematic diagram of the structure between the volute and the wind wheel in the present utility model
  • Figure 7 is a side view of the volute in the utility model
  • Figure 8 is a cross-sectional view of B-B in Figure 7;
  • Figure 9 is a partial structural diagram of the utility model
  • Figure 10 is a perspective view of the wind wheel of the utility model
  • Figure 11 is another perspective view of the wind wheel of the present invention.
  • Figure 12 is a schematic diagram of the structure of the wind wheel of the present utility model
  • Figure 13 is a front view of the wind wheel of the utility model
  • Fig. 14 is a cross-sectional view of C-C in Fig. 13.
  • this embodiment provides an induced draft fan, which includes a volute 1, a wind wheel 2, and a motor 3.
  • the volute 1 includes a volute shell 11 and a volute shell. 11
  • the cover plate 12 at the bottom, the volute shell 11 and the cover plate 12 enclose an inner cavity 13 in which the wind wheel 2 can be installed, the cover plate 12 is provided with an air inlet 14, and the side 111 of the volute shell 11 extends out to exhaust air
  • the tail of the duct 15 and the exhaust duct 15 forms a volute exhaust outlet 18, which is recessed inward in the middle of the top of the volute shell 11 for installing the motor 2, and a volute tongue 16 is provided in the inner cavity 13 near the exhaust duct 15
  • the motor 3 includes a rotating shaft 31, and the front end of the rotating shaft 31 of the motor 3 extends into the inner cavity 13 of the volute housing 11 to be installed with the wind wheel 2.
  • the top of the volute housing 11 faces the middle
  • the inner recess makes the inner cavity 13 form a first top surface 112 and a second top surface 113, a flow channel 17 is formed between the first top surface 112, the side surface 111 and the cover plate 12, and the first top surface 112 and the second top surface 113 are both
  • the width L of the first top surface 112 at the outlet 18 of the volute gradually increases from the volute tongue 16 to the first top surface 112 at the exhaust port 18 of the volute, so that the cross-sectional area of the flow passage 17 gradually increases, that is, the draft fan
  • the cross-sectional area of the flow channel gradually increases, so that the flow rate and pressure of the air flow are uniformly increased, reducing the pressure diffusion loss and vortex loss, improving the operating efficiency of the induced draft fan, reducing the rotating noise, and reducing the impact of the air flow on the volute. Thereby reducing vibration.
  • the wind wheel includes a rear wheel disc 21 and a blade group 22.
  • a shaft mounting seat 211 protrudes from the bottom surface 210 of the rear wheel disk 21.
  • a shaft hole 212 is provided in the middle of the rear wheel disk 21, and the shaft hole 212 extends into the mounting seat 211.
  • a number of blade groups 22 protrude from the bottom surface 210 of the rear wheel disc 21.
  • the blade groups 22 are circumferentially spaced around the mounting seat 211, and an air duct 23 is formed between two adjacent blade groups 22.
  • the air duct 23 The height of the rear wheel 21 gradually increases from the center of the rear wheel 21 to the edge of the rear wheel 21, effectively preventing the generation of peeling loss caused by the sudden increase of the cross-sectional area of the airflow, and effectively reducing the surging flow, and finally improving the whole The machine operation efficiency and the effect of reducing the noise and vibration of the whole machine.
  • the blade set 22 includes a main blade 22A and an auxiliary blade 22B.
  • the end 22B0 of the auxiliary blade 22B is connected to the middle section of the main blade 22A.
  • the height of the air duct 23 is from the end 22B0 of the auxiliary blade 22B to the air outlet of the blade.
  • the height H1 of the main blade 22A of the blade group 22 changes, and it gradually increases from the middle part of the connecting auxiliary blade 22B to the blade air outlet 221, effectively preventing the generation of peeling loss caused by the sudden increase in the cross-sectional area of the air flow. , And effectively reduce the surge, and finally achieve the effect of improving the operating efficiency of the whole machine and reducing the noise and vibration of the whole machine.
  • the distance H2 from the bottom end 220 of the blade set 22 to the top surface 213 of the rear wheel disc 21 is variable, and the distance H2 gradually increases from the center of the rear wheel disc 21 to the edge of the rear wheel disc 21, effectively preventing airflow from passing through.
  • the peeling loss caused by the sudden increase of the area can effectively reduce the surge, and finally achieve the effect of improving the operating efficiency of the whole machine and reducing the noise and vibration of the whole machine.
  • the rear disc The area of 21 is greater than the area of the second top surface 113.
  • the main blade 22A protrudes from the rear wheel disc 21 to form a first outer edge portion 22A1
  • the auxiliary blade 22B protrudes from the rear wheel disc 21 to form a second outer edge portion 22B1.
  • the height H3 gradually increases, and the first outer edge portion 22A1 and the second outer edge portion 22B1 are located in the flow channel 17, which can increase the air outlet area of the wind wheel and make the flow velocity and pressure of the air flow uniformly larger.
  • the bottoms of the first outer edge portion 22A1 and the second outer edge portion 22B1 are also connected to a front baffle 24, and the front baffle 24 and the rear wheel disc 21 are respectively located on both sides of the blade group 22.

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

Abstract

一种引风机，包括蜗壳（1）、风轮（2）和电机（3），蜗壳（1）包括蜗壳壳体（11）和安装在蜗壳壳体（11）底部的盖板（12），蜗壳壳体（11）与盖板（12）围成一个可安装风轮（2）的内腔（13），蜗壳壳体（11）的侧面（111）伸出排风管道（15），排风管道（15）的尾部形成蜗壳排风口（18），在蜗壳壳体（11）顶部中间向内凹陷用于安装电机（3），在内腔（13）里面靠近排风管道（15）的位置设置蜗舌（16），蜗壳壳体（11）顶部中间向内凹陷使得内腔（13）形成第一顶面（112）和第二顶面（113），第一顶面（112）、侧面（111）和盖板（12）之间形成流道（17），第一顶面（112）和第二顶面（113）均为平面，从蜗舌（16）开始沿着风轮（2）转向至蜗壳排风口（18）处第一顶面（112）的宽度L逐渐变大，从而使流道（17）横截面积逐渐变大。

Description

一种引风机 技术领域：
本实用新型涉及一种引风机。
背景技术：
现有的引风机的结构如图1所示，蜗壳内壁面1和蜗壳内壁面2都为平面，蜗壳内壁面3基本垂直于内壁面1且截面为圆型，三个面和风轮之间距离不变，风轮的出风面积也不变导致风机运行过程中效率低，且气流从风轮出口处出来出风面积突然增大，会造成气流的剥离损失很大，另外导致气流流速以及压力突然变化，会引起喘流以及较大的旋转噪声，总体效率较低并引起整机的噪音和振动。
发明内容：
本实用新型的目的是提供一种引风机，解决现有技术中气流从风轮出口处出来出风面积突然增大，会造成气流的剥离损失很大，另外导致气流流速以及压力突然变化，会引起喘流以及较大的旋转噪声，总体效率较低并引起整机的噪音和振动的技术问题。
本实用新型的目的是通过下述技术方案予以实现的。
一种引风机，包括蜗壳、风轮和电机，所述蜗壳包括蜗壳壳体和安装在蜗壳壳体底部的盖板，蜗壳壳体与盖板围成一个可安装风轮的内腔，盖板上设置进风口，蜗壳壳体的侧面伸出排风管道，排风管道的尾部形成蜗壳排风口，在蜗壳壳体顶部中间向内凹陷用于安装电机，在内腔里面靠近排风管道的位置设置蜗舌，电机包括转轴,所述电机的转轴的前端部伸入到蜗壳壳体的内腔里面与风轮安装在一起，其特征在于：蜗壳壳体顶部中间向内凹陷使得内腔形成第一顶面和第二顶面，第一顶面、侧面和盖板之间形成流道，第一顶面和第二顶面均为平面，从蜗舌开始沿着风轮转向至蜗壳排风口处第一顶面的宽度L逐渐变大，从而使流道横截面积逐渐变大。
上述所述的的风轮包括后轮盘和叶片组，后轮盘的底面中间凸出转轴安装 座，后轮盘中间设置有轴孔，轴孔伸入到安装座，在后轮盘的底面凸出若干叶片组，所述的叶片组围绕安装座周向间隔分布，相邻两个叶片组之间形成风道，所述风道的高度由后轮盘的中心往后轮盘的边缘逐渐变高。
上述所述的叶片组包括主叶片和副叶片，所述副叶片的末端连接在主叶片的中段部分，所述风道的高度由副叶片的末端往叶片出风口处逐渐变高。
上述所述的叶片组的主叶片高度H1是变化的，从连接副叶片的中段部分往叶片出风口处逐渐变高。
上述所述的叶片组的底端至后轮盘的顶面的距离H2是变化的，距离H2从后轮盘中心往后轮盘的边缘逐渐变高。
上述所述的主叶片和副叶片往叶片出风口处的距离逐渐增大，所述叶片组的主叶片和副叶片之间的后轮盘上带有缺口，后轮盘的面积大于第二顶面的面积。
上述所述的主叶片凸出后轮盘形成第一外缘部，副叶片凸出后轮盘形成第二外缘部，第一外缘部和第二外缘部的高度H3逐渐增大，第一外缘部和第二外缘部处于流道里面。
上述所述的第一外缘部和第二外缘部的最高点凸出后轮盘。
上述所述的第一外缘部和第二外缘部的底部还连接有前挡板，前挡板和后轮盘分别位于叶片组的两侧。
本实用新型与现有技术相比，具有如下效果：
1)本实用新型包括蜗壳、风轮和电机，所述蜗壳包括蜗壳壳体和安装在蜗壳壳体底部的盖板，蜗壳壳体与盖板围成一个可安装风轮的内腔，盖板上设置进风口，蜗壳壳体的侧面伸出排风管道，排风管道的尾部形成蜗壳排风口，在蜗壳壳体顶部中间向内凹陷用于安装电机，在内腔里面靠近排风管道的位置设置蜗舌，电机包括转轴,所述电机的转轴的前端部伸入到蜗壳壳体的内腔里面与风轮安装在一起，其特征在于：蜗壳壳体顶部中间向内凹陷使得内腔形成第一顶面和第二顶面，第一顶面、侧面和盖板之间形成流道，第一顶面和第二顶面 均为平面，从蜗舌开始沿着风轮转向至蜗壳排风口处第一顶面的宽度L逐渐变大，从而使流道横截面积逐渐变大，即引风机的流道横截面积逐渐变大，使气流的流速和压力均匀变大，减小了扩压损失和涡流损失，可提高引风机运行效率，并降低旋转噪声，减小了气流对蜗壳的冲击从而减小振动。
2)本实用新型的其它优点在实施例部分展开详细描述。
附图说明：
图1是现有技术中的结构示意图；
图2是本实用新型的立体图；
图3是本实用新型的另一角度立体图；
图4是本实用新型的俯视图；
图5是图4中A-A的剖视图；
图6是本实用新型中蜗壳与风轮之间的结构示意图；
图7是本实用新型中蜗壳的侧视图；
图8是图7中B-B的剖视图；
图9是本实用新型的局部结构示意图；
图10是本实用新型中风轮的立体图；
图11是本实用新型中风轮的另一角度立体图；
图12是本实用新型中风轮的结构示意图；
图13是本实用新型中风轮的主视图；
图14是图13中C-C的剖视图。
具体实施方式：
下面通过具体实施例并结合附图对本实用新型作进一步详细的描述。
实施例一：
如图2至图14所示，本实施例提供的是一种引风机，包括蜗壳1、风轮2和电机3，所述蜗壳1包括蜗壳壳体11和安装在蜗壳壳体11底部的盖板12，蜗壳壳体11与盖板12围成一个可安装风轮2的内腔13，盖板12上设置进风口 14，蜗壳壳体11的侧面111伸出排风管道15，排风管道15的尾部形成蜗壳排风口18，在蜗壳壳体11顶部中间向内凹陷用于安装电机2，在内腔13里面靠近排风管道15的位置设置蜗舌16，电机3包括转轴31,所述电机3的转轴31的前端部伸入到蜗壳壳体11的内腔13里面与风轮2安装在一起，其特征在于：蜗壳壳体11顶部中间向内凹陷使得内腔13形成第一顶面112和第二顶面113，第一顶面112、侧面111和盖板12之间形成流道17，第一顶面112和第二顶面113均为平面，从蜗舌16开始沿着风轮2转向至蜗壳排风口18处第一顶面112的宽度L逐渐变大，从而使流道17横截面积逐渐变大，即引风机的流道横截面积逐渐变大，使气流的流速和压力均匀变大，减小了扩压损失和涡流损失，可提高引风机运行效率，并降低旋转噪声，减小了气流对蜗壳的冲击从而减小振动。
所述的风轮包括后轮盘21和叶片组22，后轮盘21的底面210中间凸出转轴安装座211，后轮盘21中间设置有轴孔212，轴孔212伸入到安装座211，在后轮盘21的底面210凸出若干叶片组22，所述的叶片组22围绕安装座211周向间隔分布，相邻两个叶片组22之间形成风道23，所述风道23的高度由后轮盘21的中心往后轮盘21的边缘逐渐变高，有效防止气流通过的截面积突然增大而导致的剥离损失的产生，并有效的减小喘流，最终达到提高整机运行效率及减小整机噪音和振动的效果。
所述叶片组22包括主叶片22A和副叶片22B，所述副叶片22B的末端22B0连接在主叶片22A的中段部分，所述风道23的高度由副叶片22B的末端22B0往叶片出风口处逐渐变高，有效防止气流通过的截面积突然增大而导致的剥离损失的产生，并有效的减小喘流，最终达到提高整机运行效率及减小整机噪音和振动的效果。
所述叶片组22的主叶片22A高度H1是变化的，从连接副叶片22B的中段部分往叶片出风口221处逐渐变高，有效防止气流通过的截面积突然增大而导致的剥离损失的产生，并有效的减小喘流，最终达到提高整机运行效率及减小 整机噪音和振动的效果。
所述叶片组22的底端220至后轮盘21的顶面213的距离H2是变化的，距离H2从后轮盘21中心往后轮盘21的边缘逐渐变高，有效防止气流通过的截面积突然增大而导致的剥离损失的产生，并有效的减小喘流，最终达到提高整机运行效率及减小整机噪音和振动的效果。
所述主叶片22A和副叶片22B往叶片出风口221处的距离逐渐增大，所述叶片组22的主叶片22A和副叶片22B之间的后轮盘21上带有缺口214，后轮盘21的面积大于第二顶面113的面积。
所述主叶片22A凸出后轮盘21形成第一外缘部22A1，副叶片22B凸出后轮盘21形成第二外缘部22B1，第一外缘部22A1和第二外缘部22B1的高度H3逐渐增大，第一外缘部22A1和第二外缘部22B1处于流道17里面，可以增加风轮出风面积，使气流的流速和压力均匀变大。
第一外缘部22A1和第二外缘部22B1的最高点凸出后轮盘21。
第一外缘部22A1和第二外缘部22B1的底部还连接有前挡板24，前挡板24和后轮盘21分别位于叶片组22的两侧。
以上实施例为本实用新型的较佳实施方式，但本实用新型的实施方式不限于此，其他任何未背离本实用新型的精神实质与原理下所作的改变、修饰、替代、组合、简化，均为等效的置换方式，都包含在本实用新型的保护范围之内。

Claims (9)

  1. 一种引风机，包括蜗壳(1)、风轮(2)和电机(3)，所述蜗壳(1)包括蜗壳壳体(11)和安装在蜗壳壳体(11)底部的盖板(12)，蜗壳壳体(11)与盖板(12)围成一个可安装风轮(2)的内腔(13)，盖板(12)上设置进风口(14)，蜗壳壳体(11)的侧面(111)伸出排风管道(15)，排风管道(15)的尾部形成蜗壳排风口(18)，在蜗壳壳体(11)顶部中间向内凹陷用于安装电机(2)，在内腔(13)里面靠近排风管道(15)的位置设置蜗舌(16)，电机(3)包括转轴(31),所述电机(3)的转轴(31)的前端部伸入到蜗壳壳体(11)的内腔(13)里面与风轮(2)安装在一起，其特征在于：蜗壳壳体(11)顶部中间向内凹陷使得内腔(13)形成第一顶面(112)和第二顶面(113)，第一顶面(112)、侧面(111)和盖板(12)之间形成流道(17)，第一顶面(112)和第二顶面(113)均为平面，从蜗舌(16)开始沿着风轮(2)转向至蜗壳排风口(18)处第一顶面(112)的宽度L逐渐变大，从而使流道(17)横截面积逐渐变大。
  2. 根据权利要求1所述的一种引风机，其特征在于：所述的风轮包括后轮盘(21)和叶片组(22)，后轮盘(21)的底面(210)中间凸出转轴安装座(211)，后轮盘(21)中间设置有轴孔(212)，轴孔(212)伸入到安装座(211)，在后轮盘(21)的底面(210)凸出若干叶片组(22)，所述的叶片组(22)围绕安装座(211)周向间隔分布，相邻两个叶片组(22)之间形成风道(23)，所述风道(23)的高度由后轮盘(21)的中心往后轮盘(21)的边缘逐渐变高。
  3. 根据权利要求2所述的一种引风机，其特征在于：所述叶片组(22)包括主叶片(22A)和副叶片(22B)，所述副叶片(22B)的末端(22B0)连接在主叶片(22A)的中段部分，所述风道(23)的高度由副叶片(22B)的末端(22B0)往叶片出风口处逐渐变高。
  4. 根据权利要求3所述的一种引风机，其特征在于：所述叶片组(22)的主叶片(22A)高度H1是变化的，从连接副叶片(22B)的中段部分往叶片出风 口(221)处逐渐变高。
  5. 根据权利要求4所述的一种引风机，其特征在于：所述叶片组(22)的底端(220)至后轮盘(21)的顶面(213)的距离H2是变化的，距离H2从后轮盘(21)中心往后轮盘(21)的边缘逐渐变高。
  6. 根据权利要求4所述的一种引风机，其特征在于：所述主叶片(22A)和副叶片(22B)往叶片出风口(221)处的距离逐渐增大，所述叶片组(22)的主叶片(22A)和副叶片(22B)之间的后轮盘(21)上带有缺口(214)，后轮盘(21)的面积大于第二顶面(113)的面积。
  7. 根据权利要求4所述的一种引风机，其特征在于：所述主叶片(22A)凸出后轮盘(21)形成第一外缘部(22A1)，副叶片(22B)凸出后轮盘(21)形成第二外缘部(22B1)，第一外缘部(22A1)和第二外缘部(22B1)的高度H3逐渐增大，第一外缘部(22A1)和第二外缘部(22B1)处于流道(17)里面。
  8. 根据权利要求7所述的一种引风机，其特征在于：第一外缘部(22A1)和第二外缘部(22B1)的最高点凸出后轮盘(21)。
  9. 根据权利要求8所述的一种引风机，其特征在于：第一外缘部(22A1)和第二外缘部(22B1)的底部还连接有前挡板(24)，前挡板(24)和后轮盘(21)分别位于叶片组(22)的两侧。
PCT/CN2020/084029 2019-09-18 2020-04-09 一种引风机 WO2021051789A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6210109B1 (en) * 1998-12-18 2001-04-03 Echo Incorporated Portable fluid blower
JP2002138991A (ja) * 2000-11-06 2002-05-17 Ebara Corp 両吸込渦巻ポンプ
CN1757932A (zh) * 2005-10-27 2006-04-12 陈瑜 用于离心泵和离心式风机的叶轮
CN203641103U (zh) * 2013-11-12 2014-06-11 珠海格力电器股份有限公司 离心风机蜗壳及空调器
CN106015038A (zh) * 2015-03-30 2016-10-12 日本电产株式会社 离心风扇

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6210109B1 (en) * 1998-12-18 2001-04-03 Echo Incorporated Portable fluid blower
JP2002138991A (ja) * 2000-11-06 2002-05-17 Ebara Corp 両吸込渦巻ポンプ
CN1757932A (zh) * 2005-10-27 2006-04-12 陈瑜 用于离心泵和离心式风机的叶轮
CN203641103U (zh) * 2013-11-12 2014-06-11 珠海格力电器股份有限公司 离心风机蜗壳及空调器
CN106015038A (zh) * 2015-03-30 2016-10-12 日本电产株式会社 离心风扇

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