WO2004111520A1 - Appareil attenuateur de bruit monte sur des conduites de liquide et procede d'utilisation - Google Patents

Appareil attenuateur de bruit monte sur des conduites de liquide et procede d'utilisation Download PDF

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Publication number
WO2004111520A1
WO2004111520A1 PCT/CN2004/000659 CN2004000659W WO2004111520A1 WO 2004111520 A1 WO2004111520 A1 WO 2004111520A1 CN 2004000659 W CN2004000659 W CN 2004000659W WO 2004111520 A1 WO2004111520 A1 WO 2004111520A1
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WO
WIPO (PCT)
Prior art keywords
outlet
inlet
rotor
fluid
casing
Prior art date
Application number
PCT/CN2004/000659
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English (en)
Chinese (zh)
Inventor
Hongze Wang
Original Assignee
Hongze Wang
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hongze Wang filed Critical Hongze Wang
Publication of WO2004111520A1 publication Critical patent/WO2004111520A1/fr

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts

Definitions

  • the invention relates to a muffler device and a method thereof, and in particular to a device and a method for reducing the noise of a fluid in a pipeline. Background technique
  • the traditional muffler is generally a noise reduction device installed in the air flow channel of aerodynamic equipment (such as a blower or an air compressor) or in the intake and exhaust systems.
  • mufflers can be divided into six main types, namely resistive mufflers, resistive mufflers, impedance composite mufflers, micro-perforated plate mufflers, small hole mufflers and active mufflers.
  • the resistive muffler is made of sound absorbing material.
  • the sound wave When the sound wave enters the resistive muffler, the sound wave causes the air and small fibers in the gap of the sound-absorbing material to vibrate. Due to the effects of friction and viscous resistance, the sound energy is converted into thermal energy, thereby achieving the purpose of sound attenuation.
  • This type of muffler can mute over a wide range of medium and high frequencies.
  • the resistant muffler is a combination of tubes and chambers with abrupt interfaces. It looks like an acoustic filter. Similar to an electric filter, each cell with a tube is a mesh of the filter and has its own natural frequency. When sound waves containing various frequency components enter the first short tube, only certain frequency sound waves near the natural frequency of the first mesh can reach the second short tube mouth through the mesh, while other frequencies Sound waves cannot pass through the mesh. Can only be reflected back and forth in the cell. Resistive muffler is suitable for eliminating middle and low frequency noise.
  • a resistive composite muffler is formed.
  • Micro-perforated plate muffler is generally made of a pure metal sheet with a thickness of less than 1mm.
  • the sheet is perforated with a drill with a hole diameter of less than 1mm.
  • the perforation rate is 1% -3%.
  • the structure of the small hole muffler is a straight pipe with a closed end, and many small holes are drilled in the pipe wall.
  • the principle of the small hole muffler is based on the frequency spectrum of the jet noise. If the total area of the small holes is maintained and the number of small holes is increased, the area of each small hole is reduced. When passing through a small hole, the frequency spectrum of the jet noise will move to high frequency or ultra high frequency, so that the audible component of the human ear in the frequency spectrum is significantly reduced, thereby reducing interference and harm to people.
  • the basic principle of an active muffler is that in the original sound field, electronic equipment is used to generate a sound wave of the same magnitude and opposite phase as the original sound pressure, so that it cancels out the original sound field within a certain range.
  • the muffler has limited muffler effect and the equipment used is complicated, which limits its application.
  • the traditional muffling method by forming different cavities or using sound-absorbing materials or manufacturing a sound field with the same phase as the original sound field, is used to mute the sound. It has low muffler efficiency, or a narrow muffler band. Or it has the disadvantages of complex structure, large volume, high cost, etc., and the large pressure loss caused to the fluid due to the complicated structure of the traditional muffler device reduces the power of the muffled device (such as an internal combustion engine).
  • an object of the present invention is to provide a noise reduction muffler which is installed on a fluid pipeline and has a reduced reflection cross section to reduce the noise transmitted along the fluid in the pipeline.
  • Device. 1
  • Sound can propagate in solid, liquid, and gas media.
  • properties of the two media such as density, speed of sound propagation, etc.
  • Most (or even most) sounds will be reflected, thereby reducing the effect of sound transmission.
  • the muffler of the present invention includes a housing.
  • the housing has an inlet to allow fluid to flow into the muffler, and an outlet to allow fluid to flow out of the muffler.
  • the muffler contains a sound insulation member.
  • the sound-absorbing device containing the sound-insulating member is installed on a fluid pipe that needs to be silenced, so that the fluid can flow through the sound-absorbing device.
  • the sound-absorbing member of the present invention uses solid or gas as the sound-insulating member.
  • the muffler of the present invention uses solid or liquid as a sound insulation member, and the sound insulation member always separates the fluid at the inlet of the muffler from the fluid at the outlet, so that the fluid in the fluid The noise propagating in the pipe is reflected by the sound insulation member to achieve the purpose of reducing noise.
  • the solid sound insulation member can be rotated, so that the fluid flowing into the muffler flows with the rotation of the sound insulation member from the inlet of the muffler to its outlet, and then Flow out from the outlet, or separately set the switch as a sound insulation member at the entrance and exit of the muffler, so that the two switches are not turned on at the same time, so that at any time, the sound insulation member in the muffler blocks its entrance.
  • the fluid and the fluid at the outlet serve to reduce the noise by reflecting the noise propagating along the fluid, while allowing the fluid to flow through the muffler.
  • the muffler of the present invention interrupts the liquid (or a gas), ⁇ P, so that the liquid (or a gas) is divided into several parts by the gas (or a liquid), Noise is reflected at the gas-liquid interface, thereby achieving the effect of reducing noise.
  • FIG. 1A shows a cross-sectional view of a muffler using a rotor as a solid sound insulation member according to a first embodiment of the present invention.
  • the state of the rotor in the figure allows fluid to flow into the inner cavity of the muffler;
  • FIG. 1B shows a cross-sectional view of a muffler using a rotor as a solid sound insulation member according to a first embodiment of the present invention.
  • the state of the rotor in the figure allows fluid to flow out of the inner cavity of the muffler;
  • FIG. 1C shows an enlarged cross-sectional view of the rotor and the inlet 1 and the outlet 4 in the muffler device according to the first embodiment of the present invention, and shows an included angle between the inlet 1 and the outlet 4 in a normal direction.
  • Figure 2 shows a cross-sectional view of a noise reduction device using a rotor as a solid sound insulation member according to a second embodiment of the present invention
  • FIG. 3 shows a cross-sectional view of a noise reduction device using two switches as a solid sound insulation member according to a third embodiment of the present invention
  • FIG. 4A shows a cross-sectional view of a muffler using two switches as solid sound insulation members according to a fourth embodiment of the present invention.
  • the state of the two switches in the figure allows fluid to flow into the inner cavity of the muffler;
  • FIG. 4B is a cross-sectional view of a muffler using two switches as solid sound insulation members according to a fourth embodiment of the present invention.
  • the state of the two switches in the figure allows fluid to flow out of the inner cavity of the muffler;
  • Fig. 5A shows a rotor using three blades according to a fifth embodiment of the present invention Sectional view of a muffler as a solid sound insulation member;
  • 5B shows a cross-sectional view of a muffler using a rotor with three blades as a solid sound insulation member according to a fifth embodiment of the present invention, where the fluid entering from the inlet can push the rotor blades to rotate;
  • FIG. 6 shows a cross-sectional view of a muffler using a cylindrical rotor with two retractable blades mounted therein as a solid sound insulation member according to a sixth embodiment of the present invention
  • FIG. 7A shows a third embodiment of the present invention.
  • FIG. 7B shows a cross-sectional view of the muffler in which a sieve is added to the muffler in FIG. 7A to ensure that the inflowing gas becomes a bubble;
  • Fig. 7C shows the configuration of the screen in Fig. 7B.
  • FIG. 7D shows a cross-sectional view after a heat sink is mounted on a muffler device in a seventh embodiment according to the present invention
  • FIG. 8A shows a cross-sectional view of a muffler using a liquid sound-insulating member to muffle gas in a pipe according to an eighth embodiment of the present invention, and in this embodiment a float is used;
  • FIG. 8B shows a float according to the present invention A cross-sectional view of a muffler using a liquid sound-insulating member to muffle a gas in a pipe according to an eighth embodiment. In this embodiment, two floats are used;
  • Fig. 9 shows a cross-sectional view of a muffler device for muffling a liquid in a pipe using a gas sound-insulating member according to a ninth embodiment of the present invention.
  • FIG. 1 shows a cross-sectional view of a sound attenuation device using a solid sound insulation member according to a first embodiment of the present invention.
  • the muffler has a sealed housing 2 with an inlet 1 and an outlet 4 connected to a fluid pipeline on the housing 2 and a guide hole in the housing 2 which is fixed on the housing 2 and includes a diameter penetrating a transverse interface thereof.
  • the cylindrical rotor 3, the inlet 1 and outlet 4 on the housing 2, and the guide holes on the rotor are located on the same cross section of the rotor. When the guide holes are not in communication with the inlet and outlet, the cylindrical surface of the rotor 3 is blocked at the same time.
  • the included angle in the line direction is oc.
  • the rotor 3 is controlled by an external power device (not shown) to rotate around the longitudinal center axis of the circle center passing through its cross section. When the rotor 3 is turned to a certain position, as shown in FIG. 1A, the guide hole 5 is connected to the inlet 1. At the same time, the rotor 3 closes the outlet 4.
  • the fluid can enter the cavity A inside the housing 2 through the inlet 1 and the guide hole 5, but cannot flow out of the muffler through the outlet 4, so that the noise transmitted along the fluid is blocked by the rotor 3 reflects and cannot continue to propagate forward along the outlet 4.
  • the guide hole 5 communicates with the outlet 4, and the fluid in the cavity A flows out through the guide hole 5 and the outlet 4.
  • the rotor 3 closes the inlet 1 so that the noise propagating along the fluid is reflected by the rotor 3, so the noise flowing from the fluid flowing out of the outlet 4 is reduced.
  • the rotor 3 is continuously switched between the position where the inlet 1 is closed and the outlet 4 is closed, and the position where the outlet 4 is closed is closed by the external power device, so that the fluid continuously flows through the muffler, and the rotor 3 is a solid at the same time.
  • the sound insulation member always blocks the transmission of noise in the fluid, thereby achieving the effect of sound attenuation.
  • the housing 2 of the muffler device in this embodiment may be made of a rigid material, or may be made of a deformable material, such as an elastic material, or deformed by external force.
  • the housing 2 may be along the arrow shown in FIG. 1A. In the direction shown in the figure, it compresses and stretches, so that its inner cavity A becomes smaller or larger.
  • Fig. 2 shows a cross-sectional view of a noise reduction device using a solid sound insulation member in a second embodiment of the present invention.
  • the same components as those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and a description thereof will be omitted.
  • This embodiment differs from the first embodiment only in the rotor The structure of 3 and the relative position with the inlet 1 and the outlet 4 have changed.
  • the rotor 3 is still cylindrical, and its cylindrical surface blocks the inlet 1 and the outlet 4, but the inlet 1 is located at one end of the rotor 3.
  • the outlet 4 is located at the other end of the rotor 3.
  • two guide holes 6 and 7 passing through the rotor 3 along the diameter of the rotor cross section are located at the inlet 1 and the outlet 4, respectively.
  • the central axis of the guide holes 6 and 7 has an included angle ⁇ .
  • the rotor 3 is driven by an external power device (not shown) to rotate about its longitudinal center axis.
  • the noise reduction device of this embodiment can pass fluid through the noise reduction device, and at the same time, the solid sound insulation member 3 is used to block the propagation of noise.
  • Fig. 3 shows a sectional view of a muffler device in a third embodiment of the present invention.
  • the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and descriptions thereof are omitted.
  • the rotor 3 in the first embodiment is replaced with two switches 8 and 9 in this embodiment.
  • the opening and closing of the two switches 8 and 9 are controlled by an external power unit (not shown) so that when one of the two switches is in an open state, the other switch is in a closed state.
  • the switches 8 and 9 are continuously switched between on and off, so that fluid can continuously flow through the cavity A of the muffler, and one of the switches 8 and 9 as the sound insulation member will always The fluid in the fluid pipes at both ends of the muffler is separated, and the propagation of noise is blocked to achieve the effect of muffler.
  • FIGS. 4A and 4B are cross-sectional views of a muffler using a solid sound insulation member according to another embodiment of the present invention, in which arrows indicate the direction of fluid flow.
  • the inlet 1 and the outlet 4, and the switches 8 and 9 as sound insulation members have the same functions as the corresponding components in the third embodiment, and the cavity A is reduced to a tubular shape approximately the same as the diameter of the fluid pipe. Therefore, it is the same as the third embodiment.
  • the muffler device of this embodiment has a small volume and a simpler structure.
  • Example 5 Example 5
  • Fig. 5A shows a cross-sectional view of a noise reduction device using a solid sound insulation member according to another embodiment of the present invention.
  • the housing 2 of the muffler is cylindrical, and has an inlet 1 and an outlet 4 on a cylindrical side wall of the housing 2, and its function is the same as that of the above embodiment.
  • the rotor 10 in the housing 2 includes three rectangular blades of the same size and shape. These three blades are arranged radially outward from the center axis of the rotor, and the planes where the three blades intersect with the rotor. For the central axis, the included angle of each two blades is equal to 120 °, and the three blades are fixed to each other at the center of the rotor.
  • the rotor can rotate around its central axis, which passes through the center of the circular cross-section of the housing 2 vertically, from the central axis of the rotor 10 to the outermost of each blade
  • the length of the end is exactly equal to the inner diameter of the circular cross section of the casing 2.
  • the length of each blade is equal to the length of the casing 2.
  • the inner cavity of the body 2 is divided into three space portions of equal size, B, C, which are isolated from each other.
  • the inlet 1 and the outlet 4 divide the circumference of the cross section of the housing 2 into two arcs DE and FG.
  • the inlet 1 and the outlet 4 are set such that the included angle of the two arcs DE and FG to the central axis of the rotor 10 is larger than the included angle of any two blades by 120 °, so that the inlet 1 and the outlet 4 will be at any time They are in different parts of space A, B and C, respectively.
  • the rotor 10 rotates, the fluid flows from the inlet 1 through the inner cavity of the housing 2 and flows out from the outlet 4, and between the inlet 1 and the outlet 4 there is always a blade of the rotor 10 as the rotor of the solid sound insulation member
  • the blade of 10 plays a role in preventing noise from traveling along the fluid, thereby reducing the noise.
  • FIG. 5B shows a modification of the embodiment in FIG. 5A.
  • the direction of the fluid pipeline connected to the inlet 1 is substantially tangent to the casing 2. After the fluid enters the casing 2 and flows in a direction substantially perpendicular to the radial direction, the blade is pushed. Rotation, therefore, without an external driving device, the rotor 10 can also be rotated to allow fluid to flow through the muffler.
  • the number of rotor blades may be more than three, so that the included angle between any two adjacent blades is equal.
  • the inlet 1 and the outlet 4 divide the circle of the cross section of the housing 2 into two arcs.
  • the opening angle to the center of the circle is greater than the included angle of the adjacent blades. In this way, the blade as a solid sound insulation member can prevent the noise from spreading.
  • Fig. 6 is a cross-sectional view of a sound insulation device for a solid sound insulation member for concrete according to another embodiment of the present invention.
  • the same components as those in the fifth embodiment are denoted by the same reference numerals, and a description thereof will be omitted.
  • the cross section of the rotor 3 in the casing 2 is circular, and its radius is smaller than the radius of the internal cavity of the casing 2 and tangent to the internal cavity of the casing 2 at D.
  • the rotor 3 is rotatable about a rotation axis that passes through the center of the cross-section perpendicular to it, and is always tangent to the housing 2 at D. As shown in FIG.
  • the rotor 3 has a flat groove passing through its diameter, and two blades 12 are inserted in the flat groove.
  • the two blades are connected by a spring.
  • the maximum of the two blades is The distance at the outer end is larger than the diameter of the inner cavity of the housing 2, and when the blade is radially squeezed, it can be completely pressed into the rotor 3. In this way, during the rotation of the rotor, the two outer ends of the blade 12 are always in close contact with the inner cavity wall of the casing 2, so the rotor 3 and the blade 12 divide the inner cavity of the casing 2 into three isolated parts A, 8 with. .
  • the inlet 1 and the outlet 4 are located on both sides of the tangent point D of the rotor and the inner wall of the housing, and are close to the tangent point D.
  • the rotor 3 can be rotated by an external driving device, so that the blade rotates from the tangent point D to the inlet direction, as shown in FIG. 6. In this way, the fluid that enters the inner cavity of the casing 2 from the inlet 1 flows in the casing 2 with the rotation of the rotor 3 and the blades 12, and finally flows out from the outlet 4.
  • the rotor 3 and the two blades 12 as the sound insulation member always separate the fluid at the inlet 1 and the outlet 4, thereby preventing the propagation of noise in the fluid.
  • FIG. 7 shows a cross-sectional view of a sound attenuation device using a liquid as a sound insulation member in another embodiment according to the present invention.
  • the casing 2 contains a liquid 25, such as water, as a sound insulation member, and the liquid does not fill the entire cavity of the casing 2.
  • the gas inlet 1 is below the surface of the liquid such that All the gas flowing into the muffler enters the liquid, and a part of the pipeline communicating with the inlet 1 is higher than the liquid surface so that the liquid in the casing 2 does not flow out of the casing.
  • the outlet 4 is above the liquid level. After the gas enters the liquid from the inlet 1, it becomes a bubble 24, and each of the bubbles is blocked by a liquid 25. Therefore, the noise in the gas is reflected by the gas-liquid interface and cannot be transmitted along the air flow channel, thereby achieving the effect of reducing noise. After the bubbles rise to the liquid surface, they flow out from the outlet 4.
  • a sieve 27 is provided below the liquid surface and above the inlet 1, and there are multiple small The holes 28 (FIG. 7C) make the air flow or air bubbles from the outlet 1 become small air bubbles after passing through the sieve.
  • the liquid is relatively volatile
  • the liquid is water
  • the surface of the liquid may be covered with a layer of non-volatile liquid, such as oil, so as to reduce the volatilization rate of the liquid and extend the use time of the liquid sound insulation member.
  • a heat dissipation device 32 can be installed on the pipe and the casing 2 before the gas enters the muffler, as shown in FIG. 7D, to make the airflow temperature Lowering and lowering the temperature of the liquid in the casing 2 extends the usage time of the sound insulation member 25.
  • FIG. 8A is a cross-sectional view of a muffler using a liquid sound insulation member according to another embodiment of the present invention.
  • the same components as those of the previous embodiment are denoted by the same reference numerals, and their description is omitted.
  • the housing 2 has a float 33 that can float on the liquid 25, and a weight 36 is fixed at a position on the inner wall of the cavity of the float 33. Therefore, when the float 33 floats on the liquid 25, the float is fixed with a weight One side of 36 is always at the lower end.
  • the gas pipelines connecting the inlet 1 and the outlet 4 in the casing 2 are all hoses.
  • the inlet 1 is fixed on the lower side of the float 33, and the outlet 4 is fixed on the upper side of the float 33.
  • the inlet 1 In a state of severe bumps, or even upside down (for example, when used on an airplane), the inlet 1 is always located in the liquid 25, and the outlet 4 is always located above the liquid 25, so that the liquid 25 can always transfer the gas at the inlet and the gas at the outlet Divided to reduce noise.
  • Example 9 Example 9
  • Fig. 9 shows a cross-sectional view of a muffler using a gas-insulating member to muffle liquid flowing in a pipe in another embodiment of the present invention.
  • the inlet is located at or near the top of the housing 2, and the outlet 4 is located at the bottom of the housing 2.
  • the shell of the muffler and the rotor and the rotor blades can be made of double-layer plates.
  • the enclosed space between the double-layer plates can be evacuated or filled with sound-insulating materials, so as to achieve better results. Sound insulation effect. ⁇
  • the end of the blade contacting the inner side wall of the casing may be formed by an elastic device, for example, made of an elastic rubber material to make the blade closely contact the inner side of the casing to achieve a good sealing effect.
  • an elastic device for example, made of an elastic rubber material to make the blade closely contact the inner side of the casing to achieve a good sealing effect.
  • the prior art muffler is generally only suitable for eliminating noise in a gas, and the muffler using the solid sound insulation member or the gas sound insulation member of the present invention may be suitable for removing noise in a liquid.
  • the present invention uses a solid sound insulation Mufflers of components or liquid-insulating components are also suitable for removing noise in gases.
  • the prior art muffler Due to the structure and other characteristics of the prior art muffler, it only has a good muffler effect on noise in a specific frequency band, and the muffler frequency band is narrow. It is suitable for eliminating middle and low frequency noise, and the muffler of the present invention uses the principle of sound reflection on different material interfaces to prevent the propagation of noise by increasing the reflection interface of noise in the noise propagation channel. Low-frequency noise is also reflected on the reflection interface, so the muffler device of the present invention can achieve a good muffling effect in a wider frequency band range.
  • Existing mufflers use sound-absorbing materials or form different-sized cavities or small holes to mute the sound.
  • the muffler of the present invention has a simple structure and a small volume, and at the same time as muffling, the pressure loss caused to the fluid is small.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention se fonde sur le principe selon lequel le bruit peut se transmettre à travers les solides, les liquides et les gaz, mais être réfléchi à l'interface entre deux matériaux différents. L'invention concerne un appareil atténuateur de bruit comprenant un composant isolateur de bruit réalisé dans un matériau d'une nature qui diffère de celle du liquide circulant dans les conduites, de façon qu'il atténue le bruit du liquide sans entraver son écoulement. L'appareil atténuateur de bruit de l'invention possède une construction simple, une large fréquence d'atténuation de bruit, un encombrement réduit, et néanmoins il n'entraîne qu'une faible perte de pression du liquide.
PCT/CN2004/000659 2003-06-19 2004-06-21 Appareil attenuateur de bruit monte sur des conduites de liquide et procede d'utilisation WO2004111520A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03143179.8 2003-06-19
CN 03143179 CN1566734A (zh) 2003-06-19 2003-06-19 阻隔着流体通道的声波传播途径使流体通过的方法及其装置

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2375029A1 (fr) 2010-04-06 2011-10-12 Peugeot Citroën Automobiles SA Dispositif d'isolation d'un circuit de refroidissement
CN113571034A (zh) * 2021-08-31 2021-10-29 大连理工大学 一种低通声滤波器组宽频吸声体

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105139842A (zh) * 2015-07-28 2015-12-09 合肥科启环保科技有限公司 噪音吸收器
CN108837651B (zh) * 2018-06-24 2020-11-13 江苏兰丰环保科技有限公司 一种脱硫脱硝除尘协同处理装置

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US3148745A (en) * 1962-05-23 1964-09-15 Newport News S & D Co Noise attenuation apparatus for liquid conducting conduits
CN85104467A (zh) * 1985-06-11 1986-12-31 唐纳森有限公司 消声器装置和制造方法
DE19500450A1 (de) * 1994-01-14 1995-07-20 Gillet Heinrich Gmbh Vorrichtung zur Reduzierung von Resonanzeffekten in Rohrleitungen
DE4412517A1 (de) * 1994-04-12 1995-10-19 Bbm Technik Ges Fuer Die Verwe Ausblaseschalldämpfer
CN2238372Y (zh) * 1995-11-22 1996-10-23 陈家贤 多管道式消音器
CN2289122Y (zh) * 1997-06-16 1998-08-26 广东美的集团股份有限公司 流体管路的消声装置
CN2311611Y (zh) * 1997-08-22 1999-03-24 寿国伟 回旋形消声器
CN2350617Y (zh) * 1998-07-13 1999-11-24 中国科学技术大学 低流量缓冲消振器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148745A (en) * 1962-05-23 1964-09-15 Newport News S & D Co Noise attenuation apparatus for liquid conducting conduits
CN85104467A (zh) * 1985-06-11 1986-12-31 唐纳森有限公司 消声器装置和制造方法
DE19500450A1 (de) * 1994-01-14 1995-07-20 Gillet Heinrich Gmbh Vorrichtung zur Reduzierung von Resonanzeffekten in Rohrleitungen
DE4412517A1 (de) * 1994-04-12 1995-10-19 Bbm Technik Ges Fuer Die Verwe Ausblaseschalldämpfer
CN2238372Y (zh) * 1995-11-22 1996-10-23 陈家贤 多管道式消音器
CN2289122Y (zh) * 1997-06-16 1998-08-26 广东美的集团股份有限公司 流体管路的消声装置
CN2311611Y (zh) * 1997-08-22 1999-03-24 寿国伟 回旋形消声器
CN2350617Y (zh) * 1998-07-13 1999-11-24 中国科学技术大学 低流量缓冲消振器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2375029A1 (fr) 2010-04-06 2011-10-12 Peugeot Citroën Automobiles SA Dispositif d'isolation d'un circuit de refroidissement
CN113571034A (zh) * 2021-08-31 2021-10-29 大连理工大学 一种低通声滤波器组宽频吸声体

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