WO2021258416A1 - 风机用降噪消音器 - Google Patents

风机用降噪消音器 Download PDF

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Publication number
WO2021258416A1
WO2021258416A1 PCT/CN2020/099808 CN2020099808W WO2021258416A1 WO 2021258416 A1 WO2021258416 A1 WO 2021258416A1 CN 2020099808 W CN2020099808 W CN 2020099808W WO 2021258416 A1 WO2021258416 A1 WO 2021258416A1
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cylinder
sound
noise reduction
absorbing
silencer
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French (fr)
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蒋伟
池俭
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Jiangsu Yongyi Environmental Protection Technology Co Ltd
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Jiangsu Yongyi Environmental Protection Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • 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 the technical field of fan accessories, in particular to a noise reduction and noise reduction device used for various fans and air inlet and outlet ducts.
  • the noise reduction of the fan mainly uses fan mufflers.
  • the existing fan mufflers mainly use to reduce the aerodynamic noise of the air inlet of the air duct.
  • the air inlet is divided into several sections to eliminate wind resistance and separate the noise inside the fan.
  • the noise reduction effect is good, but There are also some problems: many anti-noise plates are designed inside the fan muffler, which hinder the flow of wind speed; the internal design of the muffler is complicated, which brings certain difficulties to processing and installation, and increases the manufacturing cost; it is bulky, heavy, and inconvenient to carry.
  • some existing mufflers have a simple structure, including a casing, an inner pipe is arranged in the casing, a porous sound-absorbing material is filled between the casing and the inner pipe, and a damper is fixed at the air inlet end of the casing by screws.
  • a number of perforated plates are also installed in the inner pipe. There are only a few through holes in the inner pipe. Since there is no block when the noise passes through the inner pipe, most of the noise will pass through the inner pipe to the outside, and only a small part of the noise will be absorbed by the sound-absorbing material from the through hole. absorb. Therefore, the noise reduction effect of this structure is not ideal.
  • the main technical problem solved by the utility model is to provide a noise-reducing silencer for a fan.
  • the noise enters through the air inlet, and the noise first bounces back to the middle cylinder through the lower cone cap, and passes through the perforated plate, the sound-absorbing plate and the sound-absorbing layer arranged in staggered parallel. After silencing and absorbing the sound, it is bounced back to the upper cone cap again and discharged through the air outlet. In this process, the noise can be bounced, muffled, and reduced repeatedly, and the noise can be reduced from more than 100 dB to 20-30 dB.
  • the sound and noise reduction effect is ideal.
  • a technical solution adopted by the present utility model is to provide a noise reduction muffler for a fan, comprising an upper cylinder, a middle cylinder and a lower cylinder, the upper cylinder and the middle cylinder
  • the cross section of the lower cylinder and the lower cylinder are both rectangular, and the diameter of the upper cylinder is reduced from bottom to top, the diameter of the lower cylinder is tapered from top to bottom, and the lower end of the lower cylinder is connected to the air inlet , The upper end of the upper cylinder is connected to the air outlet;
  • the cylinder wall of the intermediate cylinder includes an outer cylinder wall and an inner cylinder wall located inside the outer cylinder wall.
  • a sound-absorbing layer is provided between the inner cylinder wall and the outer cylinder wall, and the thickness of the sound-absorbing layer is 7- 9cm, the inner cylinder wall is a porous plate;
  • the inner cylinder wall of the middle cylinder is provided with a plurality of sound-absorbing plates, the sound-absorbing plates are perpendicular to the inner cylinder wall, and the sound-absorbing plates are arranged in parallel and spaced apart in the height direction of the middle cylinder.
  • the board includes a left sound-absorbing board and a right sound-absorbing board, and the right side of the left sound-absorbing board and the left side of the right sound-absorbing board are interlaced with each other, and the distance between adjacent sound-absorbing boards is 1/4 of the length of the sound-absorbing board -1/3; the length of the intersecting section of the left and right silencers is 1/3-1/2 of the length of the silencer;
  • the lower surface of the muffler board is a concave-convex surface formed by concave portions and convex portions;
  • the sound-absorbing board is a composite board filled with sound-absorbing cotton in the middle;
  • An upper cone cap is mounted on the inner side of the upper cylinder, a lower cone cap is mounted on the inner side of the lower cylinder, and the upper cone cap and the lower cone cap are symmetrically arranged.
  • the thickness of the sound-absorbing plate is 4-6 mm, and the height of the convex portion protruding from the lower surface is 0.6-1.0 mm.
  • the height of the upper cone cap and the lower cone cap are both 18-22 cm, and the taper of the upper cone cap and the lower cone cap are both 45-55°.
  • the lower surface of the muffler board is also covered with muffler holes for muffling.
  • the perforated plate is a galvanized plate with through holes evenly covered, the hole diameter of the through hole is 3-4 mm, and the hole spacing between adjacent through holes is 2-3 mm.
  • the upper cone cap is fixedly connected to the upper cylinder, and the structure for realizing the fixed connection is a bolt and a screw hole matching the bolt;
  • the lower cone cap is fixedly connected to the lower cylinder, and the structure for realizing the fixed connection is also a bolt and a screw hole matching the bolt.
  • one side of the muffler plate is welded to the inner cylinder wall of the intermediate cylinder.
  • the sound-absorbing plate is a galvanized metal plate filled with sound-absorbing cotton.
  • the cylinder wall of the intermediate cylinder of the present invention includes an outer cylinder wall and an inner cylinder wall.
  • a sound-absorbing layer is provided between the inner cylinder wall and the outer cylinder wall.
  • the upper cone cap is installed on the inner side, and the lower cone cap is installed on the inner side of the lower cylinder.
  • the noise enters through the air inlet.
  • the noise first bounces back to the middle cylinder through the lower cone cap, and passes through the perforated plate, multiple staggered parallel mufflers and silencers. After the sound-absorbing layer, it is bounced back to the upper cone cap again and discharged through the air outlet.
  • the sound-absorbing cotton filled with the sound-absorbing board and the sound-absorbing cotton form the concave-convex lower surface, which can improve the noise reduction effect, especially
  • the sound-absorbing panels arranged in staggered parallel can greatly increase the frequency of noise absorption and bounce, so that the noise can be bounced, muffled, and reduced by multiple times, and the noise can be reduced from more than 100 dB to 20-30 dB.
  • the effect is ideal;
  • the muffler of the present invention is equipped with an upper cone cap and a lower cone cap, which increases the number of noise bounces, absorbs noise to the greatest extent, and has a noise reduction effect;
  • the height and taper of the upper and lower cone caps of the present utility model are reasonably set, which will not hinder the flow of wind speed, and can ensure that the fan obtains sufficient air intake; it can also maximize the rebound and silencing of noise, and the effect of noise reduction is good. ;
  • the lower surface of the muffler board of the present invention is also covered with muffler holes for noise reduction, and part of the noise enters the muffler cotton through the muffler holes, further improving the noise reduction effect;
  • the perforated plate of the utility model adopts galvanized plate, which is resistant to flue gas impact, strong corrosion resistance, long life, and simple maintenance.
  • Figure 1 is a schematic diagram of the overall structure of the utility model
  • Figure 2 is a bottom view of the upper cylinder part of the utility model
  • a noise reduction muffler for a fan as shown in Figures 1 and 2, comprising an upper cylinder 1, a middle cylinder 2 and a lower cylinder 3, the upper cylinder, the middle cylinder and the The cross section of the lower cylinder is rectangular, and the diameter of the upper cylinder is reduced from bottom to top, the diameter of the lower cylinder is tapered from top to bottom, and the lower end of the lower cylinder is connected to the air inlet 4, The upper end of the upper cylinder is connected to the air outlet 5;
  • the cylinder wall of the intermediate cylinder includes an outer cylinder wall 21 and an inner cylinder wall 22 located inside the outer cylinder wall.
  • a sound-absorbing layer 23 is provided between the inner cylinder wall and the outer cylinder wall.
  • the thickness of the sound-absorbing layer It is 7-9cm, and the wall of the inner cylinder is a porous plate;
  • the inner cylinder wall of the middle cylinder is provided with a plurality of sound-absorbing plates, the sound-absorbing plates are perpendicular to the inner cylinder wall, and the sound-absorbing plates are arranged in parallel and spaced apart in the height direction of the middle cylinder.
  • the board includes a left sound-absorbing board 6 and a right sound-absorbing board 7, and the right side of the left sound-absorbing board and the left side of the right sound-absorbing board are interlaced with each other, and the distance between adjacent sound-absorbing boards is 1% of the length of the sound-absorbing board. /4-1/3;
  • the length of the intersecting section of the left and right silencers is 1/3-1/2 of the length of the silencer;
  • the lower surface of the muffler board is a concave-convex surface formed by concave portions and convex portions;
  • the sound-absorbing board is a composite board filled with sound-absorbing cotton in the middle;
  • An upper cone cap 8 is mounted on the inner side of the upper cylinder
  • a lower cone cap 9 is mounted on the inner side of the lower cylinder
  • the upper cone cap and the lower cone cap are symmetrically arranged.
  • the distance between adjacent sound-absorbing panels and the length of the intersecting sections of the left and right sound-absorbing panels are set reasonably, which will not hinder the flow of wind speed, can ensure that the fan obtains sufficient air intake; and can maximize the noise The rebound, noise reduction and noise reduction effect are good
  • the thickness of the sound-absorbing plate is 4-6 mm, and the height of the convex portion protruding from the lower surface is 0.6-1.0 mm.
  • the height H of the upper cone cap and the lower cone cap are both 18-22 cm, and the taper ⁇ of the upper cone cap and the lower cone cap are both 45-55°.
  • the lower surface of the muffler board is also covered with muffler holes for muffling.
  • the perforated plate is a galvanized plate with through holes evenly covered, the hole diameter of the through hole is 3-4 mm, and the hole spacing between adjacent through holes is 2-3 mm.
  • the upper cone cap and the upper cylinder are fixedly connected to the upper cylinder, and the structure for realizing the fixed connection is a bolt 10 and a screw hole matching the bolt;
  • the lower cone cap is fixedly connected to the lower cylinder, and the structure for realizing the fixed connection is also a bolt 10 and a screw hole matching the bolt.
  • Other fixed connection structures can also be used, for example, one end of the bolt is welded to the upper cone cap (lower cone cap), and the other end is welded to the upper cylinder (lower cylinder).
  • the way to realize the fixed connection is four-point fixation.
  • One side of the muffler board is welded to the inner cylinder wall of the middle cylinder.
  • the sound-absorbing board is a galvanized metal plate filled with sound-absorbing cotton.
  • the height of the upper cone cap and the lower cone cap are both 20 cm, and the taper of the upper cone cap and the lower cone cap are both 45°.
  • the noise reduction muffler is installed at the air outlet of the fan.
  • the air in the fan passes through the air inlet of the noise reduction muffler, and the noise enters through the air inlet.
  • multiple parallel-arranged sound-absorbing panels and sound-absorbing layers absorb sound, they are bounced back to the upper cone cap again and discharged through the air outlet.
  • the surface can improve the noise reduction effect, especially the multiple staggered parallel sound-absorbing panels, which can greatly increase the number of noise absorption and bounce, so that the noise can be reduced by more than 100 dB, down to 20-30dB, the effect of noise reduction and noise reduction is ideal.

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

Abstract

一种风机用降噪消音器，包括上筒体（1）、中间筒体（2）和下筒体（3），中间筒体（2）的筒壁包括外筒壁（21）和位于外筒壁（21）内侧的内筒壁（22），内筒壁（22）和外筒壁（21）之间设有消音层（23），消音层（23）的厚度为7-9cm，内筒壁（22）为多孔板；中间筒体（2）的内筒壁（22）处设有多块消音板，消音板在中间筒体（2）的高度方向平行且间隔设置，消音板包括左消音板和右消音板，且左消音板的右侧和右消音板的左侧相互交错，消音板的下表面为由凹部和凸部形成的凹凸面，消音板为中间填充有消音棉的复合板；上筒体（1）的内侧安装有上锥帽（8），下筒体（3）的内侧安装有下锥帽（9）。噪音通过多次反弹、消声、减燥，可将噪音由100多dB，降至20-30dB，消声降噪效果理想。

Description

风机用降噪消音器 技术领域
本实用新型涉及风机配件技术领域，尤其是涉及一种用于各类风机和进出风管道等的一种消音降噪装置。
背景技术
对风机的降噪主要是采用风机消声器，现有风机消声器主要利用降低风道进风口空气动力性噪声，将进风口分割成几段进行消除风阻以及分离风机内部的噪声，消声效果好，但是也存在一些问题：风机消声器内部设计了很多抗噪板，阻碍了风速的流动；消声器内部设计复杂，给加工安装带来一定难度，提高了制造成本；体积大，笨重，不便于搬运等。
另，部分现有消声器的结构简单，包括罩壳，罩壳内设置有内管道，罩壳与内管道之间填充有多孔吸声材料，罩壳的进风端处经螺钉固定设置有风门，所述内管道内还安装有若干穿孔板。其仅是在内管道内开有数个通孔，噪声在经过内管道时由于没有任何阻挡，大部分噪声会从通过内管道传到外部，仅有小部分噪声会从通孔内被吸声材料吸收。故此结构的消声效果不理想。
实用新型内容
本实用新型主要解决的技术问题是提供一种风机用降噪消音器，噪音通过进风口进入，噪音先经过下锥帽反弹至中间筒体，通过多孔板、交错平行设置的消音板和消音层消音吸声后，再次被反弹至上锥帽，并通过出风口排出，在此过程中，噪音通过多次反弹、消声、减燥，可将噪音由100多dB，降至20-30dB，消声降噪效果理想。
为解决上述技术问题，本实用新型采用的一个技术方案是：提供一种风机用降噪消音器，包括上筒体、中间筒体和下筒体，所述上筒体、所述中间筒体和所述下筒体的横截面均为矩形，且所述上筒体的口径从下向上减缩，所述下筒体的口径从上向下渐缩，所述下筒体的下端连接进风口，所述上筒 体的上端连接出风口；
所述中间筒体的筒壁包括外筒壁和位于所述外筒壁内侧的内筒壁，所述内筒壁和外筒壁之间设有消音层，所述消音层的厚度为7-9cm，所述内筒壁为多孔板；
所述中间筒体的内筒壁处设有多块消音板，所述消音板垂直于所述内筒壁，所述消音板在所述中间筒体的高度方向平行且间隔设置，所述消音板包括左消音板和右消音板，且所述左消音板的右侧和所述右消音板的左侧相互交错，相邻消音板之间的间距为所述消音板的长度的1/4-1/3；所述左消音板和所述右消音板交错段的长度为所述消音板的长度的1/3-1/2；
所述消音板的下表面为由凹部和凸部形成的凹凸面；
所述消音板为中间填充有消音棉的复合板；
所述上筒体的内侧安装有上锥帽，所述下筒体的内侧安装有下锥帽，所述上锥帽和所述下锥帽对称设置。
进一步地说，所述消音板的厚度为4-6mm，所述凸部凸出于所述下表面的高度为0.6-1.0mm。
进一步地说，所述上锥帽和所述下锥帽的高度皆为18-22cm，所述上锥帽和所述下锥帽的锥度皆为45-55°。
进一步地说，所述消音板的下表面还布满用于消音的消音孔。
进一步地说，所述多孔板为均匀布满通孔的镀锌板，所述通孔的孔径为3-4mm，相邻所述通孔的孔间距为2-3mm。
进一步地说，所述上锥帽和固定连接于所述上筒体，且实现所述固定连接的结构为螺栓和与螺栓匹配的螺孔；
所述下锥帽固定连接于所述下筒体，且实现所述固定连接的结构也为螺栓和与螺栓匹配的螺孔。
进一步地说，实现所述固定连接的方式为四点固定。
进一步地说，所述消音板的一侧焊接于所述中间筒体的内筒壁。
进一步地说，所述消音板为内部填充消音棉的镀锌金属板。
本实用新型的有益效果是：
一、本实用新型的中间筒体的筒壁包括外筒壁和内筒壁，内筒壁和外筒壁之间设有消音层，中间筒体具有交错平行设置的消音板，上筒体的内侧安装有上锥帽，下筒体的内侧安装有下锥帽，噪音通过进风口进入，噪音先经过下锥帽反弹至中间筒体，通过多孔板、多块交错平行设置的消音板和消音层消音吸声后，再次被反弹至上锥帽，并通过出风口排出，在此过程中，消音板填充的消音棉和消音棉成凹凸面的下表面，都能提高降噪效果，特别是多块交错平行设置的消音板，能大大提高噪音本吸收和反弹的次数，使得噪音通过多次反弹、消声、减燥，可将噪音由100多dB，降至20-30dB，消声降噪效果理想；
二、本实用新型的消声器内设有上锥帽和下锥帽，增加了噪音反弹次数，极大限度吸收噪音，起到降噪作用；
三、本实用新型的上、下锥帽的高度和锥度设置合理，既不会阻碍风速的流动，能够保证风机获取足够的进风量；又能使噪音最大程度的反弹、消音，降噪效果佳；
四、本实用新型的消音板的下表面还布满用于消音的消音孔，部分噪音通过消音孔进入消音棉，进一步提高降噪效果；
五、本实用新型的多孔板采用镀锌板，耐烟气冲击，耐腐蚀性强，寿命长，维护简单。
上述说明仅是本实用新型技术方案的概述，为了能够更清楚了解本实用新型的技术手段，并可依照说明书的内容予以实施，以下以本实用新型的较佳实施例并配合附图详细说明如后。
附图说明
图1是本实用新型的整体结构示意图；
图2是本实用新型的上筒体部分的仰视图；
附图中各部分标记如下：
上筒体1、中间筒体2、外筒壁21、内筒壁22、消音层23、下筒体3、进风口4、出风口5、左消音板6、右消音板7、上锥帽8、下锥帽9、螺栓10、 所述上锥帽和所述下锥帽的高度H、所述上锥帽和所述下锥帽的锥度α。
具体实施方式
以下通过特定的具体实施例说明本实用新型的具体实施方式，本领域技术人员可由本说明书所揭示的内容轻易地了解本实用新型的优点及功效。本实用新型也可以其它不同的方式予以实施，即，在不背离本实用新型所揭示的范畴下，能予不同的修饰与改变。
实施例：一种风机用降噪消音器，如图1和图2所示，包括上筒体1、中间筒体2和下筒体3，所述上筒体、所述中间筒体和所述下筒体的横截面均为矩形，且所述上筒体的口径从下向上减缩，所述下筒体的口径从上向下渐缩，所述下筒体的下端连接进风口4，所述上筒体的上端连接出风口5；
所述中间筒体的筒壁包括外筒壁21和位于所述外筒壁内侧的内筒壁22，所述内筒壁和外筒壁之间设有消音层23，所述消音层的厚度为7-9cm，所述内筒壁为多孔板；
所述中间筒体的内筒壁处设有多块消音板，所述消音板垂直于所述内筒壁，所述消音板在所述中间筒体的高度方向平行且间隔设置，所述消音板包括左消音板6和右消音板7，且所述左消音板的右侧和所述右消音板的左侧相互交错，相邻消音板之间的间距为所述消音板的长度的1/4-1/3；所述左消音板和所述右消音板交错段的长度为所述消音板的长度的1/3-1/2；
所述消音板的下表面为由凹部和凸部形成的凹凸面；
所述消音板为中间填充有消音棉的复合板；
所述上筒体的内侧安装有上锥帽8，所述下筒体的内侧安装有下锥帽9，所述上锥帽和所述下锥帽对称设置。
本实施例中，相邻消音板的间距、以及左、右消音板的交错段的长度均设置合理，既不会阻碍风速的流动，能够保证风机获取足够的进风量；又能使噪音最大程度的反弹、消音，降噪效果佳
所述消音板的厚度为4-6mm，所述凸部凸出于所述下表面的高度为0.6-1.0mm。
所述上锥帽和所述下锥帽的高度H皆为18-22cm，所述上锥帽和所述下锥 帽的锥度α皆为45-55°。
所述消音板的下表面还布满用于消音的消音孔。
所述多孔板为均匀布满通孔的镀锌板，所述通孔的孔径为3-4mm，相邻所述通孔的孔间距为2-3mm。
本实施例中，所述上锥帽和固定连接于所述上筒体，且实现所述固定连接的结构为螺栓10和与螺栓匹配的螺孔；
所述下锥帽固定连接于所述下筒体，且实现所述固定连接的结构也为螺栓10和与螺栓匹配的螺孔。也可以采用其它的固定连接的结构，比如将螺栓的一端焊接于所述上锥帽(下锥帽)，且另一端焊接于上筒体(下筒体)。
本实施例中，实现所述固定连接的方式为四点固定。
所述消音板的一侧焊接于所述中间筒体的内筒壁。
所述消音板为内部填充消音棉的镀锌金属板。
本实施例中，优选的，所述上锥帽和所述下锥帽的高度皆为20cm，所述上锥帽和所述下锥帽的锥度皆为45°。
本实用新型的工作原理和工作过程如下：
降噪消音器安装在风机的出风口处，当风机运行时，风机内的气体通过降噪消音器的进风口，噪音通过进风口进入，噪音先经过下锥帽反弹至中间筒体，通过多孔板、多块交错平行设置的消音板和消音层消音吸声后，再次被反弹至上锥帽，并通过出风口排出，在此过程中，消音板填充的消音棉和消音棉成凹凸面的下表面，都能提高降噪效果，特别是多块交错平行设置的消音板，能大大提高噪音本吸收和反弹的次数，使得噪音通过多次反弹、消声、减燥，可将噪音由100多dB，降至20-30dB，消声降噪效果理想。
以上所述仅为本实用新型的实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构，或直接或间接运用在其他相关的技术领域，均同理包括在本实用新型的专利保护范围内。

Claims (9)

  1. 一种风机用降噪消音器，其特征在于：包括上筒体(1)、中间筒体(2)和下筒体(3)，所述上筒体、所述中间筒体和所述下筒体的横截面均为矩形，且所述上筒体的口径从下向上减缩，所述下筒体的口径从上向下渐缩，所述下筒体的下端连接进风口(4)，所述上筒体的上端连接出风口(5)；
    所述中间筒体的筒壁包括外筒壁(21)和位于所述外筒壁内侧的内筒壁(22)，所述内筒壁和外筒壁之间设有消音层(23)，所述消音层的厚度为7-9cm，所述内筒壁为多孔板；
    所述中间筒体的内筒壁处设有多块消音板，所述消音板垂直于所述内筒壁，所述消音板在所述中间筒体的高度方向平行且间隔设置，所述消音板包括左消音板(6)和右消音板(7)，且所述左消音板的右侧和所述右消音板的左侧相互交错，相邻消音板之间的间距为所述消音板的长度的1/4-1/3；所述左消音板和所述右消音板交错段的长度为所述消音板的长度的1/3-1/2；
    所述消音板的下表面为由凹部和凸部形成的凹凸面；
    所述消音板为中间填充有消音棉的复合板；
    所述上筒体的内侧安装有上锥帽(8)，所述下筒体的内侧安装有下锥帽(9)，所述上锥帽和所述下锥帽对称设置。
  2. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述消音板的厚度为4-6mm，所述凸部凸出于所述下表面的高度为0.6-1.0mm。
  3. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述上锥帽和所述下锥帽的高度(H)皆为18-22cm，所述上锥帽和所述下锥帽的锥度(α)皆为45-55°。
  4. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述消音板的下表面还布满用于消音的消音孔。
  5. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述多孔板为均匀布满通孔的镀锌板，所述通孔的孔径为3-4mm，相邻所述通孔的孔间距为2-3mm。
  6. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述上锥帽和固定连接于所述上筒体，且实现所述固定连接的结构为螺栓(10)和与螺 栓匹配的螺孔；
    所述下锥帽固定连接于所述下筒体，且实现所述固定连接的结构也为螺栓(10)和与螺栓匹配的螺孔。
  7. 根据权利要求6所述的风机用降噪消音器，其特征在于：实现所述固定连接的方式为四点固定。
  8. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述消音板的一侧焊接于所述中间筒体的内筒壁。
  9. 根据权利要求1所述的风机用降噪消音器，其特征在于：所述消音板为内部填充消音棉的镀锌金属板。
PCT/CN2020/099808 2020-06-22 2020-07-02 风机用降噪消音器 Ceased WO2021258416A1 (zh)

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