CN109488833B - A plate type muffler - Google Patents

A plate type muffler Download PDF

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Publication number
CN109488833B
CN109488833B CN201811523227.9A CN201811523227A CN109488833B CN 109488833 B CN109488833 B CN 109488833B CN 201811523227 A CN201811523227 A CN 201811523227A CN 109488833 B CN109488833 B CN 109488833B
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Prior art keywords
windward
sheet
plate
muffler
thickness
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CN201811523227.9A
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CN109488833A (en
Inventor
赵迎九
邱兆国
魏普
江腾武
郭江海
任玉凤
于雅楠
钟振茂
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Huadian Technology Co ltd
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Huadian Heavy Industries Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/20—Reflecting arrangements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Exhaust Silencers (AREA)
  • Duct Arrangements (AREA)

Abstract

本发明涉及消声器技术领域，具体涉及一种片式消声器。其包括座体和消声片，消声片，安装在所述座体的内腔中，具有位于所述座体入口处的迎风面，所述迎风面包括迎风部，和与所述迎风部连接的倾斜部，所述倾斜部相对所述消声片的延伸方向具有设定的倾斜角度；气流从所述座体入口处进入内腔中时，与所述迎风面发生撞击；气流与迎风部的中部撞击，反弹后在所述消声片的侧壁外侧流入内腔中；气流与所述倾斜部的远离所述迎风部的一端撞击，反弹后经所述消声片的侧壁外侧流入内腔中。本发明的片式消声器具有迎风面局部阻力小，消声效果好，适用范围广的优点。

The present invention relates to the technical field of silencers, and specifically to a plate-type silencer. It includes a seat body and a silencer plate. The silencer plate is installed in the inner cavity of the seat body and has a windward surface located at the entrance of the seat body. The windward surface includes a windward portion and an inclined portion connected to the windward portion. The inclined portion has a set inclination angle relative to the extension direction of the silencer plate. When the airflow enters the inner cavity from the entrance of the seat body, it collides with the windward surface. The airflow collides with the middle of the windward portion, and after rebounding, it flows into the inner cavity from the outside of the side wall of the silencer plate. The airflow collides with the end of the inclined portion away from the windward portion, and after rebounding, it flows into the inner cavity through the outside of the side wall of the silencer plate. The plate-type silencer of the present invention has the advantages of small local resistance on the windward surface, good silencer effect, and wide application range.

Description

Sheet type muffler
Technical Field
The invention relates to the technical field of silencers, in particular to a sheet type silencer.
Background
The muffler means that for the air flow pipeline with noise transmission, the noise in the pipeline can be attenuated or reflected back by using the pipeline with sound absorption lining and elbow or using the noise reduction devices such as the pipeline with suddenly changed sectional area and other discontinuous acoustic impedance. The sheet type muffler is characterized in that the shape of the muffler sheet is a sheet type muffler, and the resistance of the muffler is mainly concentrated at the inlet of the muffler and mainly the local resistance of the muffler sheet. In the prior art, the inlet end of the silencing sheet of the sheet type silencer is of a semicircular structure, when air flow enters the sheet type silencer, the air flow collides with the semicircular structure, the impacted air flow collides with the semicircular structure again, the area of the outer wall of the semicircular structure is larger, and the local resistance of the windward side of the silencing sheet is larger, so that the silencer is only suitable for occasions with large air flow and has limited application range; meanwhile, when the air flow overcomes the resistance and enters the inner cavity of the sheet type muffler, the flow speed of the air flow in the sheet type muffler is correspondingly larger, and the time for absorbing noise by the sound absorption lining is short, so that the silencing effect of the sheet type muffler is poor.
Disclosure of Invention
Therefore, the invention provides the sheet type muffler with small local resistance on the windward side, good noise elimination effect and wide application range.
In order to solve the problems, the invention provides a sheet type muffler, which comprises a seat body and a muffler sheet, wherein the muffler sheet is arranged in an inner cavity of the seat body and is provided with a windward surface positioned at an inlet of the seat body, the windward surface comprises a windward part and an inclined part connected with the windward part, and the inclined part has a set inclined angle relative to the extending direction of the muffler sheet; when the air flow enters the inner cavity from the inlet of the seat body, the air flow collides with the windward surface; the air flow collides with the middle part of the windward part, and after rebound, flows into the inner cavity at the outer side of the side wall of the silencing sheet; the air flow collides with one end of the inclined part far away from the windward part, and after rebound, the air flow flows into the inner cavity through the outer side of the side wall of the silencing sheet.
The thickness of the windward part perpendicular to the extension direction of the silencing sheet is 1/5-5/2 of the thickness of the silencing sheet.
The thickness of the windward part perpendicular to the extension direction of the silencing sheet is 1/3 of the thickness of the silencing sheet.
The windward part is a plane perpendicular to the extending direction of the silencing sheet.
The projection of the inclined part in the extension direction of the silencing sheet is 0.9-1.1 times of the thickness of the silencing sheet.
The projection length of the inclined part in the extension direction of the silencing sheet is the same as the thickness of the silencing sheet.
The silencing sheets are arranged in parallel, and the side walls of the silencing sheets are parallel to the extending square of the silencing sheets.
The device also comprises a mounting part arranged at the inlet of the seat body, and one end, far away from the seat body, of the mounting part is connected with the air flow output piece.
The technical scheme of the invention has the following advantages:
1. The invention relates to a sheet type muffler, which comprises a seat body and a silencing sheet, wherein the silencing sheet is arranged in an inner cavity of the seat body and is provided with a windward surface positioned at an inlet of the seat body, the windward surface comprises a windward part and an inclined part connected with the windward part, and the inclined part has a set inclined angle relative to the extending direction of the silencing sheet; when the air flow enters the inner cavity from the inlet of the seat body, the air flow collides with the windward surface; the air flow collides with the middle part of the windward part, and after rebound, flows into the inner cavity at the outer side of the side wall of the silencing sheet; the air flow collides with one end of the inclined part far away from the windward part, and after rebound, the air flow flows into the inner cavity through the outer side of the side wall of the silencing sheet. After the airflow collides with the windward side, the airflow enters the inner cavity through the outer side of the side wall of the silencing sheet, and does not collide with the windward side again, so that the resistance of the airflow entering the inner cavity is reduced; moreover, because the windward side comprises the inclined part, the outer wall area of the windward side is smaller than the outer wall wind-blocking area of the semicircular structure, and the local resistance when the air flow enters the inner cavity can be correspondingly reduced, so that the sheet type muffler is also suitable for occasions with small air flow, namely, suitable for air flow output pieces with small power, and the application range is wider. In addition, the air flow can be crossed with the air flow directly entering the inner cavity after rebound of the windward side to form mixed flow, so that the flow speed of the air flow in the inner cavity is reduced, and the silencing effect of the sheet type silencer is better.
2. According to the sheet type muffler, the thickness of the windward side perpendicular to the extending direction of the muffler sheet is 1/3 of the thickness of the muffler sheet, and the projection of the inclined part in the extending direction of the muffler sheet is 1 time of the thickness of the muffler sheet, so that the muffler effect of the sheet type muffler is best.
3. According to the sheet type muffler, the mounting part is arranged, so that the sheet type muffler is conveniently connected with the airflow output piece, the airflow output by the airflow output piece is ensured to flow into the sheet type muffler, noise caused by overflow of the airflow is prevented, and the silencing effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a sectional view of a sheet-type muffler of the present invention, taken in a section parallel to the width direction and the length direction of the muffler sheet;
FIG. 2 is an enlarged view of the sound damping fin of FIG. 1;
reference numerals illustrate:
1-a base; 2-a sound damping sheet; 3-inner cavity; 41-windward part; 42-inclined portion; 5-side walls; 6-an installation part; 7-avoiding part; 71-avoiding the side walls.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The sheet type muffler of the present embodiment, as shown in fig. 1 and 2, includes a base body 1, a muffler sheet 2, and a mounting portion 6.
The silencing sheets 2 are arranged in the inner cavity 3 of the base body 1 and are arranged in parallel, and the side walls 5 of the silencing sheets 2 are parallel to the extending square of the silencing sheets 2. The silencing sheet 2 is provided with a windward surface positioned at the inlet of the seat body 1 and an avoidance part 7 positioned at the outlet of the seat body 1.
The windward side includes a windward portion 41 and an inclined portion 42 connected to the windward portion 41, and the inclined portion 42 has a set inclination angle with respect to the extending direction of the muffler sheet 2. In this embodiment, the windward portion 41 is a plane perpendicular to the extending direction of the muffler plate 2, that is, the windward surface is an isosceles trapezoid with an upper bottom facing the inlet of the base 1.
In the sheet muffler of this embodiment, as shown in fig. 2, when the air flow enters the inner cavity 3 from the inlet of the seat body 1, the air flow collides with the windward surface; the air flow collides with the middle part of the windward part 41, the rebound track is A, and after rebound, the air flow flows into the inner cavity 3 outside the side wall 5 of the silencing sheet 2; the air flow collides with one end of the inclined part 42 far away from the windward part 41, the rebound track is B, and the air flow flows into the inner cavity 3 through the outer side of the side wall 5 of the silencing sheet 2 after rebound.
One end of the avoidance portion 7 is located at the outlet of the seat body 1, the other end of the avoidance portion 7 is located at a position where turbulence can be generated in the inner cavity 3, and the thickness of the avoidance portion 7 is smaller than that of the silencing sheet 2. In this embodiment, the evacuation portion 7 is formed by inwardly shrinking the muffler sheet 2 in the thickness direction, and two evacuation side walls 71 of the evacuation portion 7 in the thickness direction are parallel to the center line of the muffler sheet 2. As shown in fig. 1, the projection of the relief portion on the plane of the muffler sheet in the thickness direction and the longitudinal direction is rectangular.
The structural resistance and the silencing amount of the sheet type silencer are simulated and predicted, and when the thickness of the avoidance part 7 is 1/3 of the thickness of the silencing sheet 2, the length of the avoidance part 7 is 2 to 4 times of the thickness of the silencing sheet 2; and the thickness of the windward portion 41 perpendicular to the extending direction of the sound damping sheet 2 is 1/3 of the thickness of the sound damping sheet 2, and the projection of the inclined portion 42 in the extending direction of the sound damping sheet 2 is 1 time of the thickness of the sound damping sheet 2, the sound damping effect of the sheet type muffler is best.
The installation department 6 sets up pedestal 1 entrance, the one end of keeping away from of installation department 6 pedestal 1 is connected with the air current output piece to guarantee that the air current that exports from the air current output piece flows into the pan silencer in whole, make the noise cancelling effect of piece formula silencer better.
In the sheet type muffler of the embodiment, after the airflow collides with the windward side at the airflow inlet, the airflow enters the inner cavity 3 through the outer side of the side wall 5 of the muffler sheet 2, and does not collide with the windward side again, so that the resistance of the airflow entering the inner cavity is reduced; moreover, because the windward side comprises the inclined part 42, the outer wall area of the windward side is smaller than the outer wall wind-blocking area of the semicircular structure, and the local resistance when the air flow enters the inner cavity 3 can be correspondingly reduced, so that the sheet type muffler is also suitable for occasions with small air flow, namely suitable for air flow output pieces with small power, and the application range is wider. In addition, the air flow can be crossed with the air flow directly entering the inner cavity 3 after rebound of the windward side to form mixed flow, so that the flow speed of the air flow in the inner cavity 3 is reduced, and the silencing effect of the sheet type silencer is better. At the air flow outlet, the arrangement of the avoiding part can prevent the air flow from generating turbulence in the inner cavity, reduce noise generated again due to the turbulence and enable the silencing effect of the sheet type silencer to be better.
As an alternative embodiment, the thickness of the relief portion 7 is 1/5 to 5/2 of the thickness of the sound damping sheet 2.
As an alternative embodiment, the thickness of the windward side perpendicular to the extension direction of the sound damping sheet 2 is between 1/5 and 5/2 of the thickness of the sound damping sheet 2, and the projection of the inclined portion 42 in the extension direction of the sound damping sheet 2 is 0.9 to 1.1 times the thickness of the sound damping sheet 2, and this size arrangement of the windward side has the advantage of small local resistance as well.
As an alternative embodiment, the windward portion 41 has an arc shape, and two ends of the arc shape are respectively connected to the inclined portions 42. When the air flow enters the inner cavity 3 from the inlet of the seat body 1, the air flow collides with the windward part 41; the air flow collides with the middle part of the windward part 41, and flows into the inner cavity 3 outside the side wall 5 of the silencing sheet 2 after rebounding; the air flow collides with one end of the inclined part 42 far away from the windward part 41, and after rebound, the air flow flows into the inner cavity 3 through the outer side of the side wall 5 of the silencing sheet 2.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (4)

1.一种片式消声器，其特征在于，包括，1. A plate-type muffler, characterized in that it comprises: 座体(1)；A seat body (1); 消声片(2)，安装在所述座体(1)的内腔(3)中，具有位于所述座体(1)入口处的迎风面，所述迎风面包括迎风部(41)，和与所述迎风部(41)连接的倾斜部(42)，所述倾斜部(42)相对所述消声片(2)的延伸方向具有设定的倾斜角度；A sound-absorbing sheet (2) is installed in the inner cavity (3) of the seat body (1), and has a windward surface located at the entrance of the seat body (1), the windward surface comprising a windward portion (41) and an inclined portion (42) connected to the windward portion (41), the inclined portion (42) having a set inclination angle relative to the extension direction of the sound-absorbing sheet (2); 气流从所述座体(1)入口处进入内腔(3)中时，与所述迎风面发生撞击；气流与迎风部(41)的中部撞击，反弹后在所述消声片(2)的侧壁(5)外侧流入内腔(3)中；气流与所述倾斜部(42)的远离所述迎风部(41)的一端撞击，反弹后经所述消声片(2)的侧壁(5)外侧流入内腔(3)中；When the airflow enters the inner cavity (3) from the entrance of the seat body (1), it collides with the windward surface; the airflow collides with the middle part of the windward portion (41), and after rebounding, it flows into the inner cavity (3) from the outside of the side wall (5) of the muffler plate (2); the airflow collides with the end of the inclined portion (42) away from the windward portion (41), and after rebounding, it flows into the inner cavity (3) from the outside of the side wall (5) of the muffler plate (2); 所述迎风部(41)为垂直于所述消声片(2)延伸方向的平面；The windward portion (41) is a plane perpendicular to the extension direction of the muffler sheet (2); 所述消声片(2)还具有位于所述座体(1)出口处的避让部(7)；所述避让部(7)的一端位于所述座体(1)的出口处，另一端位于所述内腔(3)中产生湍流的位置处，所述避让部(7)的厚度小于所述消声片(2)的厚度；The muffler sheet (2) further comprises a relief portion (7) located at the outlet of the seat body (1); one end of the relief portion (7) is located at the outlet of the seat body (1), and the other end is located at a position where turbulence is generated in the inner cavity (3); the thickness of the relief portion (7) is less than the thickness of the muffler sheet (2); 所述消声片(2)在厚度方向上向内收缩形成所述避让部(7)，所述避让部(7)在厚度方向上的两避让侧壁(71)与所述消声片(2)的中线平行；避让部(7)在消声片(2)厚度方向和长度方向所在平面的投影为矩形；The muffler sheet (2) shrinks inwardly in the thickness direction to form the avoidance portion (7); two avoidance side walls (71) of the avoidance portion (7) in the thickness direction are parallel to the center line of the muffler sheet (2); the projection of the avoidance portion (7) on the plane where the muffler sheet (2) is located in the thickness direction and the length direction is a rectangle; 所述倾斜部(42)在所述消声片(2)延伸方向上的投影的长度与消声片(2)厚度相同；The length of the projection of the inclined portion (42) in the extension direction of the sound-absorbing sheet (2) is the same as the thickness of the sound-absorbing sheet (2); 所述消声片(2)相互平行设置，且所述消声片(2)的侧壁(5)与所述消声片(2)的延伸方向平行；The sound-absorbing sheets (2) are arranged parallel to each other, and the side walls (5) of the sound-absorbing sheets (2) are parallel to the extension direction of the sound-absorbing sheets (2); 还包括设置在所述座体(1)入口处的安装部(6)，所述安装部(6)的远离所述座体(1)的一端与气流输出件连接。It also comprises a mounting portion (6) arranged at the inlet of the seat body (1), and an end of the mounting portion (6) away from the seat body (1) is connected to an airflow output member. 2.根据权利要求1所述的片式消声器，其特征在于，所述迎风部(41)的垂直于所述消声片(2)延伸方向的厚度为所述消声片(2)厚度的1/5－5/2之间。2. The plate-type silencer according to claim 1, characterized in that the thickness of the windward portion (41) perpendicular to the extension direction of the silencer plate (2) is between 1/5 and 5/2 of the thickness of the silencer plate (2). 3.根据权利要求2所述的片式消声器，其特征在于，所述迎风部(41)的垂直于所述消声片(2)延伸方向的厚度为所述消声片(2)厚度的1/3。3. The plate-type silencer according to claim 2 is characterized in that the thickness of the windward portion (41) perpendicular to the extension direction of the silencer plate (2) is 1/3 of the thickness of the silencer plate (2). 4.根据权利要求1－3中任一项所述的片式消声器，其特征在于，所述倾斜部(42)的在所述消声片(2)延伸方向上的投影为消声片(2)厚度的0.9－1.1倍。4. The plate-type silencer according to any one of claims 1 to 3, characterized in that the projection of the inclined portion (42) in the extension direction of the silencer plate (2) is 0.9 to 1.1 times the thickness of the silencer plate (2).
CN201811523227.9A 2018-12-12 2018-12-12 A plate type muffler Active CN109488833B (en)

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GB984817A (en) * 1960-03-11 1965-03-03 Colchester Woods Silencing device for gas currents
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CN2270838Y (en) * 1995-04-15 1997-12-17 铁道部隧道工程局科学研究所 Noise silencer of axial flow fan for tunnel
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KR20030037506A (en) * 2001-11-06 2003-05-14 현대자동차주식회사 Muffler apparatus
CN202090995U (en) * 2011-06-20 2011-12-28 四川正升声学科技有限公司 Slice-type silencer
CN104008748A (en) * 2014-05-06 2014-08-27 北京绿创声学工程设计研究院有限公司 Shuttle type sheet silencer
CN205559373U (en) * 2016-04-16 2016-09-07 南方风机股份有限公司 Shock -resistant pipeline formula silencer
CN207993474U (en) * 2018-01-24 2018-10-19 北京万讯达声学设备有限公司 A kind of resistive diversion muffler of chip
CN109488832A (en) * 2018-12-12 2019-03-19 华电重工股份有限公司 A kind of strip-type silencer
CN209540300U (en) * 2018-12-12 2019-10-25 华电重工股份有限公司 A chip muffler
CN209540301U (en) * 2018-12-12 2019-10-25 华电重工股份有限公司 A chip muffler

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984817A (en) * 1960-03-11 1965-03-03 Colchester Woods Silencing device for gas currents
WO1992009988A1 (en) * 1990-11-21 1992-06-11 Sound Attenuators Limited Improvements in attenuators
CN2270838Y (en) * 1995-04-15 1997-12-17 铁道部隧道工程局科学研究所 Noise silencer of axial flow fan for tunnel
US6419576B1 (en) * 2001-03-22 2002-07-16 Air Handling Engineering Ltd. Sound attenuating inlet silencer for air supplying fan
KR20030037506A (en) * 2001-11-06 2003-05-14 현대자동차주식회사 Muffler apparatus
CN202090995U (en) * 2011-06-20 2011-12-28 四川正升声学科技有限公司 Slice-type silencer
CN104008748A (en) * 2014-05-06 2014-08-27 北京绿创声学工程设计研究院有限公司 Shuttle type sheet silencer
CN205559373U (en) * 2016-04-16 2016-09-07 南方风机股份有限公司 Shock -resistant pipeline formula silencer
CN207993474U (en) * 2018-01-24 2018-10-19 北京万讯达声学设备有限公司 A kind of resistive diversion muffler of chip
CN109488832A (en) * 2018-12-12 2019-03-19 华电重工股份有限公司 A kind of strip-type silencer
CN209540300U (en) * 2018-12-12 2019-10-25 华电重工股份有限公司 A chip muffler
CN209540301U (en) * 2018-12-12 2019-10-25 华电重工股份有限公司 A chip muffler

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