WO2021120457A1 - 一种引风机 - Google Patents

一种引风机 Download PDF

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Publication number
WO2021120457A1
WO2021120457A1 PCT/CN2020/084037 CN2020084037W WO2021120457A1 WO 2021120457 A1 WO2021120457 A1 WO 2021120457A1 CN 2020084037 W CN2020084037 W CN 2020084037W WO 2021120457 A1 WO2021120457 A1 WO 2021120457A1
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WO
WIPO (PCT)
Prior art keywords
blade
induced draft
draft fan
volute
rear wheel
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PCT/CN2020/084037
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English (en)
French (fr)
Inventor
林炎虎
张淼
郭烈维
王鸿彬
Original Assignee
中山大洋电机股份有限公司
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Application filed by 中山大洋电机股份有限公司 filed Critical 中山大洋电机股份有限公司
Publication of WO2021120457A1 publication Critical patent/WO2021120457A1/zh
Priority to US17/523,892 priority Critical patent/US11988220B2/en

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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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • 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

Definitions

  • the utility model relates to an induced draft fan.
  • the existing induced draft fan includes a volute, a wind wheel, a motor, and a capacitor.
  • a cavity is opened in the middle of the volute and an air inlet and an air outlet communicating with the cavity are provided.
  • the motor is installed On the volute, the wind wheel includes a front wind disk 1a, a rear wind disk 2a, and a number of blades 3a installed and connected between the front wind disk 1a and the rear wind disk 2a.
  • An air inlet 11a is provided in the middle of the front wind disk 1a.
  • An air duct 4a is formed between the two adjacent blades 3a. Each blade 3a is the same and is evenly distributed on the circumference.
  • the blade 3a includes an outer side surface 31a and an inner side surface 32a, and the axial direction of the outer side surface 31a and the inner side surface 32a
  • the sections are parallel, that is, both are perpendicular to the rear wind disc 2a.
  • the gas pressure and flow rate on the outer surface 31a of the blade 3a of the wind wheel with such a structure are much greater than the pressure and flow rate on the inner surface 32a of the blade 3a of the wind wheel, so that the pressure and flow rate at the air outlet of the entire wind wheel are not uniform.
  • the airflow damage is large and it is easy to produce surging.
  • the uneven airflow is easily lost in the volute, which makes the induced draft fan low in efficiency and the induced draft fan is prone to noise and vibration.
  • the purpose of the utility model is to provide an induced draft fan, which can solve the problem of uneven pressure and flow rate of the air outlet of the wind wheel in the prior art, large airflow damage, easy to generate surging, low operation efficiency of the whole machine and easy noise generation of the whole machine And vibration technical issues.
  • the purpose of the utility model is to provide an induced draft fan, which 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 form one
  • the inner cavity of the wind wheel can be installed, the middle of the cover plate is provided with an air inlet, and the side of the volute is provided with an air outlet.
  • 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 to interact with the wind.
  • the wheels are installed together.
  • the wind wheel includes a rear wheel disc and blades. The bottom surface of the rear wheel disc protrudes from the shaft mounting seat, and the middle of the rear wheel disc is provided with a shaft hole.
  • the shaft hole extends into the mounting seat, and the bottom surface of the rear wheel disc protrudes Several blades, several blades are circumferentially spaced around the mounting seat, and an air duct is formed between two adjacent blades.
  • the feature is that the blade includes an inner side surface and an outer side surface, and at least part of the inner side surface and the outer side surface of the same blade The space is inclined, at least part of the inner side and the bottom surface of the rear wheel are inclined.
  • the outer side is perpendicular to the rear wheel.
  • the inner side surface includes a parallel surface and an inclined surface, the parallel surface is parallel to the outer side surface, and a V shape is formed between the outer side surface and the inclined surface, and an included angle a is formed between the outer side surface and the inclined surface, and the included angle a is an acute angle.
  • the included angle a satisfies: 30° ⁇ a ⁇ 45°.
  • the inner diameter D1 of the starting point of the inclination of the inner surface is larger than the inner diameter D2 of the blade.
  • the blade includes a main blade and an auxiliary blade, the end of the auxiliary blade is connected to the middle section of the main blade, the main blade and the rear wheel disc are perpendicular, the auxiliary blade and the rear disc are inclined, and the inner surface of the auxiliary blade forms an inclined surface.
  • a V-shaped groove is dug between the main blade and the auxiliary blade.
  • the depth H1 of the V-shaped groove gradually becomes deeper from the end of the auxiliary blade to the air outlet of the blade.
  • the width L1 of the V-shaped groove is from the end of the auxiliary blade to the air outlet of the blade. Gradually widen.
  • top ends of a plurality of blades are connected with an annular connecting plate at the air outlet of the blades.
  • the inner surface of the cover is wave-shaped, and the wave-shaped trough depth H2 gradually becomes shallower from the air inlet to the outer edge of the cover.
  • 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 an inner cavity in which the wind wheel can be installed.
  • An air inlet is opened in the middle of the cover, and an air outlet is provided on the side of the volute.
  • 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 shaft mounting seat protrudes from the middle of the bottom surface of the rear wheel disc.
  • a shaft hole is arranged in the middle of the rear wheel disc. The shaft hole extends into the mounting seat.
  • the bottom surface of the rear wheel disc protrudes several blades, and several blades are installed around The seat is spaced apart in the circumferential direction, and an air duct is formed between two adjacent blades. It is characterized in that the blade includes an inner side surface and an outer side surface. In the same blade, at least part of the inner side surface and the outer side surface are inclined, at least partly The inner side of the rear wheel is inclined to the bottom surface of the rear wheel disc, which can increase the pressure generated by the induced draft fan in an effective space.
  • the pressure and flow rate are more uniform to reduce surging, which can reduce the loss of uneven air flow in the volute, thereby increasing the suction Fan operating efficiency and reduce the noise and vibration of induced draft fan;
  • Figure 1 is a perspective view of the prior art
  • Fig. 2 is a schematic diagram of a partial structure of the prior art
  • Figure 3 is a perspective view of the first embodiment
  • Figure 4 is a front view of the first embodiment
  • Figure 5 is a cross-sectional view of A-A in Figure 4.
  • Fig. 6 is a schematic diagram of the structure of the cover plate in the first embodiment
  • Figure 7 is a perspective view of the wind wheel in the first embodiment
  • Figure 8 is another perspective view of the wind wheel in the first embodiment
  • Figure 9 is a partial enlarged view of D in Figure 8.
  • Figure 10 is a side view of the wind wheel in the first embodiment
  • Figure 11 is a cross-sectional view of Figure 9 B-B;
  • Figure 12 is a front view of the wind wheel in the first embodiment
  • Fig. 13 is a cross-sectional view of C-C in Fig. 12.
  • 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 is mounted on the bottom of the volute shell 11.
  • the cover plate 12, the volute shell 11 and the cover plate 12 enclose an inner cavity 10 in which the wind wheel 2 can be installed.
  • the cover plate 12 is provided with an air inlet 121 in the middle, and an air outlet 13 is provided on the side of the volute 1,
  • the motor 3 includes a rotating shaft 31.
  • the front end of the rotating shaft 31 of the motor 3 extends into the inner cavity 10 of the volute casing 11 and is installed with the wind wheel 2.
  • the wind wheel 2 includes a rear wheel disc 21 and blades 22.
  • the rear wheel disc A shaft mounting seat 211 protrudes from the bottom surface of the rear wheel 21.
  • a shaft hole 212 is provided in the middle of the rear wheel disk 21.
  • the shaft hole 212 extends into the mounting seat 211.
  • the bottom surface 213 of the rear wheel disk 21 protrudes a number of blades 22.
  • the seats 211 are distributed at intervals in the circumferential direction, and an air duct 23 is formed between two adjacent blades 22, which is characterized in that the blade 22 includes an inner side surface 221 and an outer side surface 222.
  • At least part of the inner side surface 221 and the outer side surface 222 is inclined, at least part of the inner side surface 221 and the bottom surface 213 of the rear wheel disc 21 are inclined, which can increase the pressure generated by the induced draft fan in an effective space, and the pressure and flow rate are more uniform to reduce surging, and can reduce airflow Uneven loss in the volute, thereby improving the operating efficiency of the induced draft fan and reducing the noise and vibration of the induced draft fan.
  • the outer surface 222 is perpendicular to the rear wheel 21.
  • the inner side surface 221 includes a parallel surface 2211 and an inclined surface 2212.
  • the parallel surface 2211 is parallel to the outer side surface 222.
  • the outer side surface 222 and the inclined surface 2212 form a V shape.
  • the outer side surface 222 and the inclined surface 2212 form an angle a, the included angle a is an acute angle, and the wind wheel structure with V-shaped blades is strong, which can increase the pressure generated by the fan in an effective space.
  • the included angle a satisfies: 30° ⁇ a ⁇ 45°. This setting makes the pressure and flow rate of the air outlet of the entire wind wheel more uniform, which can reduce surging. When the wind wheel is applied to the induced draft fan, it can reduce the uneven air flow in the volute. In order to improve the operating efficiency of the induced draft fan and reduce the noise and vibration of the induced draft fan, the effect is better.
  • the inner diameter D1 of the starting point of the inclination of the inner side surface 221 is greater than the inner diameter D2 of the blade 22.
  • the blade 22 includes a main blade 223 and an auxiliary blade 224.
  • the end 2240 of the auxiliary blade 224 is connected to the middle section of the main blade 223.
  • the main blade 223 is perpendicular to the rear disc 21, and the auxiliary blade 224 and the rear disc 21 are inclined.
  • the inner surface of the auxiliary blade 224 forms an inclined surface 2212, and the structural arrangement is reasonable, which can reduce the loss of uneven air flow in the volute.
  • a V-shaped groove 220 is dug between the main blade 223 and the auxiliary blade 224.
  • the depth H1 of the V-shaped groove 220 gradually becomes deeper from the end of the auxiliary blade to the air outlet of the blade.
  • the width L1 of the V-shaped groove 220 is changed from that of the auxiliary blade 224.
  • the end 2240 gradually widens toward the air outlet of the blade, and the structural arrangement is reasonable, so that the air outlet cross-sectional area of the auxiliary blade gradually increases from the inner circle to the outer circle.
  • top ends of a plurality of blades 22 are connected with an annular connecting plate 24 at the air outlet of the blades to improve the overall structural strength of the wind wheel.
  • the inner surface 122 of the cover 12 is wave-shaped, and the depth H2 of the wave-shaped trough 123 gradually becomes shallower from the air inlet 122 to the outer edge of the cover 12, which can effectively reduce the leakage of high-pressure gas in the volute to the air inlet 122. , And can weaken the impact of the airflow of the blade 22 on the volute 1 and reduce the vibration.

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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)，盖板(12)中间开设有进风口(121)，电机(3)包括转轴(31)，电机(3)的转轴(31)的前端部伸入到蜗壳壳体(11)的内腔(10)里面与风轮(2)安装在一起，风轮(2)包括后轮盘(21)和叶片(22)，后轮盘(21)的底面(213)凸出若干叶片(22)，若干叶片(22)围绕安装座(211)周向间隔分布，相邻两个叶片(22)之间形成风道(23)，叶片(22)包括内侧面(221)和外侧面(222)，在同一片叶片(22)中至少部分的内侧面(221)与外侧面(222)之间是倾斜的，至少部分的内侧面(221)与后轮盘(21)的底面(213)是倾斜的，可以在有效的空间内提高引风机产生的压力，压力和流速较为均匀减少喘流，可以减少气流不均匀在蜗壳内的损失，从而提高引风机运行效率及减小引风机噪音和振动。

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：
如图1和图2所示，现有的引风机包括蜗壳、风轮、电机和电容，在蜗壳中间开设有空腔并且设置有与空腔连通的进风口和排风口，电机安装在蜗壳上，所述风轮包括前风盘1a、后风盘2a以及安装连接在前风盘1a和后风盘2a之间的若干叶片3a，前风盘1a中间设置进风口11a，相邻两叶片3a之间形成风道4a，所述每一个叶片3a都是一样的，且圆周均匀分布，所述叶片3a包括外侧面31a和内侧面32a，外侧面31a和内侧面32a的轴向截面之间是平行的,即两者与后风盘2a都是垂直的。这样结构的风轮的叶片3a的外侧面31a的气体压力和流速比风轮的叶片3a的内侧面32a的压力和流速要大得多，使整个风轮的出风口的压力和流速不均匀，气流损伤较大，容易产生喘流，当风轮应用到引风机时，不均匀的气流在蜗壳内容易损失，从而使得引风机运行效率低及引风机容易产生噪音和振动。
实用新型内容：
本实用新型的目的是提供一种引风机，解决现有技术中风轮的出风口的压力和流速不均匀，气流损伤较大，容易产生喘流，使整机运行效率低及整机容易产生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。
本实用新型的目的是提供一种引风机，包括蜗壳、风轮和电机，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，盖板中间开设有进风口，蜗壳的侧面上设置有排风口，电机包括转轴,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，风轮包括后轮盘和叶片，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，后轮盘的底面凸出若干叶片，若干叶片围绕安装座周向间隔分布，相邻两个叶片之间形成风道，其特征在于：叶片包括内侧面和外侧面，在同一片叶片中至少部分的内侧面与外侧面之间是倾斜的，至少部分的内侧面与后轮盘的底面是倾斜的。
外侧面与后轮盘是垂直的。
内侧面包括平行面和倾斜面，平行面与外侧面平行，外侧面与倾斜面之间构成V形，外侧面与倾斜面之间形成夹角a,夹角a为锐角。
夹角a满足：30°≤a≤45°。
夹角a满足：a＝35°。
内侧面的倾斜起点的内径D1大于叶片的内径D2。
叶片包括主叶片和副叶片，副叶片的末端连接在主叶片的中段部分，主叶片与后轮盘是垂直的，副叶片与后轮盘是倾斜的，副叶片的内侧面形成倾斜面。
主叶片和副叶片之间挖设有V形槽，V型槽的深度H1由副叶片的末端往叶片出风口处逐渐变深，V型槽的宽度L1由副叶片的末端往叶片出风口处逐渐变宽。
若干叶片的顶端部位于叶片出风口处设有环形连接板连接。
盖板的内表面呈波浪型，波浪型的波谷深度H2由进风口往盖板的外侧边缘逐渐变浅。
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，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，盖板中间开设有进风口，蜗壳的侧面上设置有排风口，电机包括转轴,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，风轮包括后轮盘和叶片，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，后轮盘的底面凸出若干叶片，若干叶片围绕安装座周向间隔分布，相邻两个叶片之间形成风道，其特征在于：叶片包括内侧面和外侧面，在同一片叶片中至少部 分的内侧面与外侧面之间是倾斜的，至少部分的内侧面与后轮盘的底面是倾斜的，可以在有效的空间内提高引风机产生的压力，压力和流速较为均匀减少喘流，可以减少气流不均匀在蜗壳内的损失，从而提高引风机运行效率及减小引风机噪音和振动；
2)其它优点在具体实施例中作详细说明。
附图说明：
图1是现有技术的立体图；
图2是现有技术的局部结构示意图；
图3是实施例一的立体图；
图4是实施例一的正视图；
图5是图4中A-A的剖视图；
图6是实施例一中盖板的结构示意图；
图7是实施例一中风轮的立体图；
图8是实施例一中风轮的另一角度立体图；
图9是图8中D的局部放大图；
图10是实施例一中风轮的侧视图；
图11是图9中B-B的剖视图；
图12是实施例一中风轮的正视图；
图13是图12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3至图13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，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10，盖板12中间开设有进风口121，蜗壳1的侧面上设置有排风口13，电机3包括转轴31,电机3的转轴31 的前端部伸入到蜗壳壳体11的内腔10里面与风轮2安装在一起，风轮2包括后轮盘21和叶片22，后轮盘21的底面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，后轮盘21的底面213凸出若干叶片22，若干叶片22围绕安装座211周向间隔分布，相邻两个叶片22之间形成风道23，其特征在于：叶片22包括内侧面221和外侧面222，在同一片叶片22中至少部分的内侧面221与外侧面222之间是倾斜的，至少部分的内侧面221与后轮盘21的底面213是倾斜的，可以在有效的空间内提高引风机产生的压力，压力和流速较为均匀减少喘流，可以减少气流不均匀在蜗壳内的损失，从而提高引风机运行效率及减小引风机噪音和振动。
外侧面222与后轮盘21是垂直的。
内侧面221包括平行面2211和倾斜面2212，平行面2211与外侧面222平行，外侧面222与倾斜面2212之间构成V形，外侧面222与倾斜面2212之间形成夹角a,夹角a为锐角，V形叶片的风轮结构强度好，可以在有效的空间内提高风机产生的压力。
夹角a满足：30°≤a≤45°，这样设置使整个风轮出风口的压力和流速更均匀，可以减少喘流，当风轮应用到引风机时，可以减少气流不均匀在蜗壳内的损失，从而提高引风机运行效率及减小引风机噪音和振动，效果更好。
夹角a满足：a＝35°，这样设置使整个风轮出风口的压力和流速更均匀，可以减少喘流，当风轮应用到引风机时，可以减少气流不均匀在蜗壳内的损失，从而提高引风机运行效率及减小引风机噪音和振动，效果最佳。
内侧面221的倾斜起点的内径D1大于叶片22的内径D2，当风轮应用在引风机时，这样的设置使得引风机运行效率最高，噪音和振动最低。
叶片22包括主叶片223和副叶片224，副叶片224的末端2240连接在主叶片223的中段部分，主叶片223与后轮盘21是垂直的，副叶片224与后轮盘21是倾斜的，副叶片224的内侧面形成倾斜面2212，结构布置合理，可以减少气流不均匀在蜗壳内的损失。
主叶片223和副叶片224之间挖设有V形槽220，V型槽220的深度H1由副叶片的末端往叶片出风口处逐渐变深，V型槽220的宽度L1由副叶片224的末端2240往叶片出风口处逐渐变宽，结构布置合理，使得副叶片出风截面积从内圈向外圈逐渐增大。
若干叶片22的顶端部位于叶片出风口处设有环形连接板24连接，提高风轮整体结构强度。
盖板12的内表面122呈波浪型，波浪型的波谷123深度H2由进风口122往盖板12的外侧边缘逐渐变浅，可以有效的减小蜗壳内高压气体向进风口122处的泄露，且可以削弱叶片22气流对蜗壳1的冲击从而减小振动。
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 (10)

  1. 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(10)，盖板(12)中间开设有进风口(121)，蜗壳(1)的侧面上设置有排风口(13)，电机(3)包括转轴(31),电机(3)的转轴(31)的前端部伸入到蜗壳壳体(11)的内腔(10)里面与风轮(2)安装在一起，风轮(2)包括后轮盘(21)和叶片(22)，后轮盘(21)的底面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)，后轮盘(21)的底面(213)凸出若干叶片(22)，若干叶片(22)围绕安装座(211)周向间隔分布，相邻两个叶片(22)之间形成风道(23)，其特征在于：叶片(22)包括内侧面(221)和外侧面(222)，在同一片叶片(22)中至少部分的内侧面(221)与外侧面(222)之间是倾斜的，至少部分的内侧面(221)与后轮盘(21)的底面(213)是倾斜的。
  2. 根据权利要求1所述的一种引风机，其特征在于：外侧面(222)与后轮盘(21)是垂直的。
  3. 根据权利要求1或2所述的一种引风机，其特征在于：内侧面(221)包括平行面(2211)和倾斜面(2212)，平行面(2211)与外侧面(222)平行，外侧面(222)与倾斜面(2212)之间构成V形，外侧面(222)与倾斜面(2212)之间形成夹角a,夹角a为锐角。
  4. 根据权利要求3所述的一种引风机，其特征在于：夹角a满足：30°≤a≤45°。
  5. 根据权利要求4所述的一种引风机，其特征在于：夹角a满足：a＝35°。
  6. 根据权利要求5所述的一种引风机，其特征在于：内侧面(221)的倾斜起点的内径D1大于叶片(22)的内径D2。
  7. 根据权利要求3所述的一种引风机，其特征在于：叶片(22)包括主叶片(223)和副叶片(224)，副叶片(224)的末端(2240)连接在主叶片(223)的中段部分，主叶片(223)与后轮盘(21)是垂直的，副叶片(224)与后轮盘(21)是倾斜的，副叶片(224)的内侧面形成倾斜面(2212)。
  8. 根据权利要求7所述的一种引风机，其特征在于：主叶片(223)和副叶片(224)之间挖设有V形槽(220)，V型槽(220)的深度H1由副叶片的末端往叶片出风口处逐渐变深，V型槽(220)的宽度L1由副叶片(224)的末端(2240)往叶片出风口处逐渐变宽。
  9. 根据权利要求7所述的一种引风机，其特征在于：若干叶片(22)的顶端部位于叶片出风口处设有环形连接板(24)连接。
  10. 根据权利要求3所述的一种引风机，其特征在于：盖板(12)的内表面(122)呈波浪型，波浪型的波谷(123)深度H2由进风口(122)往盖板(12)的外侧边缘逐渐变浅。
PCT/CN2020/084037 2019-12-17 2020-04-09 一种引风机 WO2021120457A1 (zh)

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CN206830525U (zh) * 2017-04-10 2018-01-02 中山大洋电机股份有限公司 一种风机蜗壳
CN207018245U (zh) * 2017-08-02 2018-02-16 新力净化科技(深圳)有限公司 一种低阻力叶轮结构
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Publication number Priority date Publication date Assignee Title
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
JP5353864B2 (ja) * 2010-11-18 2013-11-27 パナソニック株式会社 送風装置
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