CN203604186U - Double-layer serial micro-perforated pipe muffler - Google Patents

Double-layer serial micro-perforated pipe muffler Download PDF

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Publication number
CN203604186U
CN203604186U CN201320763233.8U CN201320763233U CN203604186U CN 203604186 U CN203604186 U CN 203604186U CN 201320763233 U CN201320763233 U CN 201320763233U CN 203604186 U CN203604186 U CN 203604186U
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China
Prior art keywords
micropunch
pipe
micro
inner tube
perforated pipe
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Expired - Lifetime
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CN201320763233.8U
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Chinese (zh)
Inventor
杜松泽
刘志恩
张焰
田翠翠
侯献军
颜伏伍
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Abstract

The utility model relates to the field of mufflers, in particular to a double-layer serial micro-perforated pipe muffler. An air intake end is directly communicated with an air exhaust end through a muffler body. The muffler body is a multi-layer cylindrical body formed by coaxially connecting a shell (4), an outer micro-perforated pipe (3) and an inner micro-perforated pipe (2) from outside to inside in a sleeved mode, wherein the central axis shared by the shell (4), the outer micro-perforated pipe (3) and the inner micro-perforated pipe (2), the central axis of the air intake end and the central axis of the air exhaust end are located in the same straight line, micro holes in the outer micro-perforated pipe (3) and micro holes in the inner micro-perforated pipe (2) are straight-through micro holes which are perpendicular to the central axis and distributed in the wall of the outer micro-perforated pipe (3) and the wall of the inner micro-perforated pipe (2) respectively, and cavities are formed between the inner micro-perforated pipe (2) and the outer micro-perforated pipe (3) and between the outer micro-perforated pipe (3) and the shell (4) respectively and not filled with any filling material. When the muffler works, airflow moves through the pipes directly, and therefore backpressure loss is small. The muffler has an excellent muffling effect in a whole spectral range, particularly in a high-frequency section, and the muffling amount ranges from 10 dB to 20 dB.

Description

A kind of double-deck series connection micropunch muffler pipe
Technical field
The utility model relates to silencing apparatus field, and a kind of bilayer series connection micropunch muffler pipe that the intake and exhaust of barrier film extraction pump are eliminated the noise that is applied to is specifically provided.
Background technique
When the work of barrier film extraction pump, intake and exhaust noise is mainly made up of gas flow noise and diaphragm vibration percussion noise, and noise spectrum is take high-frequency noises as main.For the elimination of high frequency noise, dissipative muffler can have good effect, but its inside needs filling sucting sound material, be not suitable for relative closure environmental work, because the washing away for a long time the thin filiform of lower sound-absorbing material and inevitably can swim in working room of exhaust stream, thereby operator's health is had a negative impact; The long-term sound-absorbing material making in silencing apparatus that washes away reduces, and soundproof effect reduces, and therefore its working life is not long.Reactive muffler can be produced impedance mismatching and reached by labyrinth the effect of noise elimination, but complicated cavity or resonant cavity design make muffler volume larger, and the pressure loss is larger, has affected the pumping efficiency of pump.
Model utility content
The technical problems to be solved in the utility model is, providing a kind of can use for a long time in relative closure working environment, tool is high temperature resistant, corrosion-resistant, resistance to gas shock, long service life, soundproof effect are good, exhaust pressure loss is little, simple in structure, it is easy to process, utilize smaller size smaller to reach larger soundproof effect, lower-cost silencing apparatus, is particularly useful for the noise elimination of medium-high frequency section.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
A kind of double-deck series connection micropunch muffler pipe, comprise inlet end (6), exhaust end (7) and the muffler body between described inlet end (6), exhaust end (7), it is characterized in that: described inlet end, exhaust end are by the direct conducting of muffler body, muffler body is coaxially socketed and is formed multi-layer barrel main body by shell (4), micropunch outer tube (3), micropunch inner tube (2) three parts from outside to inside, and the central axis of the central axis of three partial commons and inlet end and exhaust end is located along the same line; Micropore on micropunch outer tube (3), the each pipe layer of micropunch inner tube (2) is perpendicular to central axis and is dispersed throughout the straight-through micropore of tube wall separately; Between micropunch pipe inner tube (2) and micropunch pipe outer tube (3) and between micropunch pipe outer tube (3) and shell (4), be that cavity and each cavity are all without any packing material; Inlet end (6) is connected by front cover (1) sealing with one end of muffler body, and exhaust end (7) is connected by rear end cover (5) sealing with the other end of muffler body; The center of front cover (1) and rear end cover (5) arranges central through bore, and central through bore diameter is identical with the diameter of micropunch inner tube (2), inlet end (6), exhaust end (7); Micropunch inner tube (2) is directly communicated with one end of inlet end (6), exhaust end (7) or micropunch inner tube (2) and directly stretches out and form exhaust end (7) from the central through bore of rear end cover (5).
By technique scheme, micropunch pipe outer tube, between micropunch pipe inner tube and shell, is separated into volume two-part cavity not etc. by the cavity between micropunch pipe inner tube and shell.
By technique scheme, in multi-layer barrel main body, the cross section of shell (4) and micropunch pipe outer tube (3) is square, and the cross section of micropunch pipe inner tube (2) is circular.
By technique scheme, the micropore size of micropunch pipe inner tube (2) and micropunch pipe outer tube (3) is identical or different, but the porosity ratio that on two-layer pipe, micropore distributes is not identical.
By technique scheme, the micropore size separately of micropunch pipe inner tube (2) and micropunch pipe outer tube (3) is 0.1-0.5mm, and porosity ratio is less than 5%.
By technique scheme, the pipe thickness of micropunch outer tube (3), the each pipe layer of micropunch inner tube (2) is identical or different.
The utility model muffler body adopts double-deck micropunch pipe, between two-layer micropunch pipe, there is space, without packing material, internal layer micropunch pipe and outer microtube perforated pipe thickness of slab, aperture, porosity ratio and cavity depth Proper Match, realize the elimination to different frequency range noise.When silencing apparatus work, air-flow directly flows by pipeline, and back pressure loss is little.This exhaust silencer is simple in structure, it is easy, with low cost to process, and pure metal structure can high temperature resistant, corrosion-resistant, resistance to gas shock, long service life.Within the scope of high frequency, have fine soundproof effect, sound deadening capacity can reach 10-20dB.When double-deck series connection micropunch muffler pipe work, the inlet end (6) of air-flow from front cover (1) axially flows into, flows through the exhaust end 7 from rear end cover 5 after the radial pore noise elimination of double-deck series connection micropunch pipe (2,3) and discharges vertically.Air-flow is when through silencing apparatus runner, and micro-pore diameter and porosity ratio on each layer of microporous pipe tube wall are little, and surface is relatively smooth, less to air current flow resistance, and main gas flows along tube axis direction, and therefore the pressure loss is little.When sound wave passes through micropore, be converted into heat energy because the rubbing action of air and micropore makes acoustic energy, thereby realize the object of eliminating the noise.In micropunch tubular construction, pore size can affect the frequency of noise elimination; Under identical aperture, porosity ratio increases frequency of noise elimination meeting toward high-frequency mobile; Change cavity depth, the distance also changing between two-layer micropunch pipe can improve deadening frequency band width, and improves sound deadening capacity.Reasonably design porosity ratio, aperture and the plate rear chamber degree of depth can obtain wider frequency of noise elimination and larger sound deadening capacity.
As deformation design of the present utility model, also can design three layers and the multilayer series connection micropunch muffler pipe of four layers of similar structure, but exceed four layers substantially without soundproof effect.
The beneficial effects of the utility model are: in the situation that buffer chamber not being set, only use double-deck series connection micropunch pipe just can reach good soundproof effect, compared with prior art the volume of silencing apparatus reduces; Inlet end and exhaust end directly communicate, and air-flow, substantially without any turning and buffering, has farthest reduced flow resistance when air-flow passes through silencing apparatus; Pure metal structure, can high temperature resistant, corrosion-resistant, resistance to gas shock, long service life; Do not adopt inflammable, the easy inhalation (inhalatio)s such as acoustical cotton, guaranteed the safety of people when silencing apparatus is worked in relative closure environment.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is double-deck series connection micropunch muffler pipe structural representation of the present utility model;
Fig. 2 is A-A schematic cross-section of Fig. 1;
Fig. 3 is micropore inner tube micropore alignment placement schematic diagram;
Fig. 4 is that micropore outer tube micropore is arranged partial schematic diagram;
In Fig. 1-4, each reference character is as follows: front cover 1, micropore inner tube 2, micropore outer tube 3, shell 4, rear end cover 5, inlet end 6, exhaust end 7, runner I 8, cavity II 9, cavity III 10; Micropore inner tube micropore 11; Micropore outer tube micropore 12.
Embodiment
Embodiment one:
As Fig. 1-4, double-deck series connection micropunch muffler pipe of the present utility model, comprise inlet end 6, exhaust end 7 and the muffler body between described inlet end 6, exhaust end 7, it is characterized in that: described inlet end, exhaust end are by the direct conducting of muffler body, muffler body is coaxially socketed and is formed multilayer main body by shell 4, micropunch outer tube 3, micropunch inner tube 2 three parts from outside to inside, and the central axis of the central axis of three partial commons and inlet end and exhaust end is located along the same line; Micropore on micropunch outer tube 3, the each pipe layer of micropunch inner tube 2 is perpendicular to central axis and is dispersed throughout the straight-through micropore of tube wall separately; Between micropunch pipe inner tube 2 and micropunch pipe outer tube 3 and between micropunch pipe outer tube 3 and shell 4, be that cavity and each cavity are all without any packing material.
As shown in Figure 2, muffler body cross section is circular; The arrangement that adopts inlet end directly to communicate by suppressor case with exhaust end, described inlet end and exhaust end are positioned at the center at cylinder two ends; In suppressor case, arrange double-deck micropunch pipe along axial direction, described enclosure interior spatial separation is become to runner I 8, cavity II 8, cavity III 10; Described double-deck micropunch pipe cross section is rounded.Internal layer microporous pipe is identical with exhaust end diameter with inlet end, directly inlet end and exhaust end described in conducting.Outer microporous pipe, between interior microporous pipe and housing, is separated into volume two-part not etc. by the cavity between described interior microporous pipe and housing along housing axial direction; The micropore (aperture also can be different) that is equipped with same apertures in described interior microporous pipe and outer microporous pipe, the micropore that in two-layer microporous pipe, micropore adopts is arranged different.
Described micropore inner tube 2 and micropore outer tube 3 adopt the sheetmetal punching of same thickness to make, film thickness 0.5mm.As shown in Figure 3-4, described micropore inner tube micropore 11 diameters are 0.5mm, along axial adjacent micropore 11 distance of center circle of silencing apparatus from being 1.6mm, along adjacent two row micropore 11 distance of center circle of silencing apparatus cross-sectional circumferential direction from being 1mm.Described micropore outer tube micropore 12 diameters are 0.5mm, along axial adjacent micropore 12 distance of center circle of silencing apparatus from being 2mm, along adjacent two row micropore 12 distance of center circle of silencing apparatus cross-sectional circumferential direction from being 1.6mm.
Embodiment two:
Basic structure is identical with embodiment one Fig. 1 and 3-4, and difference is that shell 4 cross sections are square, and micropunch outer tube 3 cross sections are square, and micropunch inner tube 2 cross sections are circular.
Certainly in other embodiments, shell 4 cross sections and micropunch outer tube 3 cross sections can be also equilateral polygon, as rhombus or pentagon.
In above-described embodiment, when double-deck series connection micropunch muffler pipe work of the present utility model, the inlet end 6 of air-flow from front cover 1 flows into, and flows through shell 4 and double-deck series connection micropunch pipe 2,3, and the exhaust end 7 after double-deck micropunch pipe is eliminated the noise from rear end cover 5 is discharged.Air-flow when the silencing apparatus without any turning and buffering course, thereby farthest reduce exhaust back pressure.
The foregoing is only the restriction the utility model that is preferably not used in of the present utility model; those skilled in the art can carry out various changes and not depart from spirit and scope of the present utility model the utility model, and all these change the protection domain that all should belong to the utility model claims.

Claims (6)

1. a double-deck series connection micropunch muffler pipe, comprise inlet end (6), exhaust end (7) and the muffler body between described inlet end (6), exhaust end (7), it is characterized in that: described inlet end, exhaust end are by the direct conducting of muffler body, muffler body is coaxially socketed and is formed multi-layer barrel main body by shell (4), micropunch outer tube (3), micropunch inner tube (2) three parts from outside to inside, and the central axis of the central axis of three partial commons and inlet end and exhaust end is located along the same line; Micropore on micropunch outer tube (3), the each pipe layer of micropunch inner tube (2) is perpendicular to central axis and is dispersed throughout the straight-through micropore of tube wall separately; Between micropunch pipe inner tube (2) and micropunch pipe outer tube (3) and between micropunch pipe outer tube (3) and shell (4), be that cavity and each cavity are all without any packing material; Inlet end (6) is connected by front cover (1) sealing with one end of muffler body, and exhaust end (7) is connected by rear end cover (5) sealing with the other end of muffler body; The center of front cover (1) and rear end cover (5) arranges central through bore, and central through bore diameter is identical with the diameter of micropunch inner tube (2), inlet end (6), exhaust end (7); Micropunch inner tube (2) is directly communicated with one end of inlet end (6), exhaust end (7) or micropunch inner tube (2) and directly stretches out and form exhaust end (7) from the central through bore of rear end cover (5).
2. silencing apparatus according to claim 1, is characterized in that: micropunch pipe outer tube, between micropunch pipe inner tube and shell, is separated into volume two-part cavity not etc. by the cavity between micropunch pipe inner tube and shell.
3. silencing apparatus according to claim 1 and 2, is characterized in that: in multi-layer barrel main body, the cross section of shell (4) and micropunch pipe outer tube (3) is square, and the cross section of micropunch pipe inner tube (2) is circular.
4. silencing apparatus according to claim 3, is characterized in that: the micropore size of micropunch pipe inner tube (2) and micropunch pipe outer tube (3) is identical or different, but the porosity ratio that on two-layer pipe, micropore distributes is not identical.
5. according to the silencing apparatus described in claim 1 or 2 or 4, it is characterized in that: the micropore size separately of micropunch pipe inner tube (2) and micropunch pipe outer tube (3) is 0.1-0.5mm, and porosity ratio is less than 5%.
6. silencing apparatus according to claim 5, is characterized in that: the pipe thickness of micropunch outer tube (3), the each pipe layer of micropunch inner tube (2) is identical or different.
CN201320763233.8U 2013-11-28 2013-11-28 Double-layer serial micro-perforated pipe muffler Expired - Lifetime CN203604186U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103671071A (en) * 2013-11-28 2014-03-26 武汉理工大学 Double-layer series silencer with miniature perforated pipes
CN105089813A (en) * 2015-08-26 2015-11-25 成都博世德能源科技股份有限公司 Rotating vane type efficient noise reduction air filtering device used for gas turbine
CN107816595A (en) * 2017-12-13 2018-03-20 武汉理工大学 A kind of not even depth back of the body chamber micropunch muffler pipe in parallel
CN107917302A (en) * 2017-12-13 2018-04-17 武汉理工大学 A kind of high-efficient wide-frequency micropunch muffler pipe
CN109199218A (en) * 2018-09-28 2019-01-15 江苏美的清洁电器股份有限公司 Cleaning equipment and silencing means for cleaning equipment
CN109386505A (en) * 2017-08-09 2019-02-26 开利公司 For the muffler and refrigerating plant in refrigerating plant
CN110017266A (en) * 2019-04-04 2019-07-16 瑞安市乐登汽车部件有限公司 A kind of pneumatic silencer
CN113251405A (en) * 2021-05-13 2021-08-13 中国船舶重工集团公司第七一九研究所 Steam bubbling device and steam power system
CN113658574A (en) * 2021-09-01 2021-11-16 江苏亚星波纹管有限公司 Multifunctional environment-friendly energy-saving silencer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103671071A (en) * 2013-11-28 2014-03-26 武汉理工大学 Double-layer series silencer with miniature perforated pipes
CN105089813A (en) * 2015-08-26 2015-11-25 成都博世德能源科技股份有限公司 Rotating vane type efficient noise reduction air filtering device used for gas turbine
CN109386505A (en) * 2017-08-09 2019-02-26 开利公司 For the muffler and refrigerating plant in refrigerating plant
CN109386505B (en) * 2017-08-09 2022-02-11 开利公司 Silencer for refrigerating device and refrigerating device
CN107917302A (en) * 2017-12-13 2018-04-17 武汉理工大学 A kind of high-efficient wide-frequency micropunch muffler pipe
CN107816595A (en) * 2017-12-13 2018-03-20 武汉理工大学 A kind of not even depth back of the body chamber micropunch muffler pipe in parallel
CN107816595B (en) * 2017-12-13 2024-04-09 武汉理工大学 Parallel unequal-depth sub-back cavity micro-perforated pipe muffler
CN107917302B (en) * 2017-12-13 2024-04-09 武汉理工大学 Broadband efficient micro-perforated pipe muffler
CN109199218A (en) * 2018-09-28 2019-01-15 江苏美的清洁电器股份有限公司 Cleaning equipment and silencing means for cleaning equipment
CN110017266A (en) * 2019-04-04 2019-07-16 瑞安市乐登汽车部件有限公司 A kind of pneumatic silencer
CN110017266B (en) * 2019-04-04 2024-03-22 瑞安市乐登汽车部件有限公司 Pneumatic muffler
CN113251405A (en) * 2021-05-13 2021-08-13 中国船舶重工集团公司第七一九研究所 Steam bubbling device and steam power system
CN113251405B (en) * 2021-05-13 2022-05-20 中国船舶重工集团公司第七一九研究所 Steam bubbling device and steam power system
CN113658574A (en) * 2021-09-01 2021-11-16 江苏亚星波纹管有限公司 Multifunctional environment-friendly energy-saving silencer

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