CN102620104A - Flow induction noise isolating and muffling device - Google Patents
Flow induction noise isolating and muffling device Download PDFInfo
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- CN102620104A CN102620104A CN2012100755021A CN201210075502A CN102620104A CN 102620104 A CN102620104 A CN 102620104A CN 2012100755021 A CN2012100755021 A CN 2012100755021A CN 201210075502 A CN201210075502 A CN 201210075502A CN 102620104 A CN102620104 A CN 102620104A
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Abstract
The invention discloses a flow induction noise isolating and muffling device, relates to the field of noise control, and in particular relates to an isolation device for two flow water noise sources. The flow induction noise isolating and muffling device comprises an inlet pipe (1), an outlet pipe (2), an air exhaust port (3), a pot body (4) and a multipore plate (5). An interference muffling technology, a variable-frequency attenuation muffling technology and a multipore noise absorption technology are comprehensively used, so that mutual interference between the two noise sources is isolated; and aiming at a multi-frequency noise muffling situation, a good noise reduction effect is achieved. The flow induction noise isolating and muffling device is high in muffling and noise isolation performance, is convenient to process and has a small volume.
Description
Technical field
The present invention is a kind of noise elimination, sound arrester, is applicable to the measurement Research of sound source characteristic in the water circulation system, when refering in particular to a certain device hydrodynamic noise sound source characteristic in the research system in the isolation system other parts produce the device of noise interference.
Background technique
In the pipe-line system noise control technique, the sound source characteristic that accurately measures each parts is to realize whole pipe-line system " calm type " key for design.With pump flow-induction measurement system of noise is example; Form by parts such as pump, pipeline, turbine flowmeter, valves as the one of which; The flowing noise signal that measures at delivery side of pump is the synthetic of pump noise and other parts noise of system, and it is necessary to eliminate turbine flowmeter and valve The noise and be the sound source characteristic of accurately measuring pump.Because sound is fast in water transmission speed, wavelength is longer, and traditional muffler design is generally bulky, make trouble, and can only be to several kinds of frequency noise reductions of design, and defening effect is not good enough.Therefore, developing convenient and reliable noise elimination, sound arrester, is to provide reliable laboratory data necessary for a certain parts sound source characteristic measurement in the research water circulation system.
Through retrieval, this paper is adopted during about measurement flow-induction noise pot type sound insulation, silencer do not have relevant report.
Summary of the invention
The objective of the invention is provides a kind of sound insulation, silencer for measuring flow-induction noise source characteristic; Solve interference, resonance, the frequency conversion problem of the sounding (turbine flowmeter, valve) of water circulation system downstream unit, thereby accomplish the accurate measurement of sound source characteristic the UUT hydrodynamic noise.
The technical solution adopted for the present invention to solve the technical problems is: comprise import, outlet, tank body, sandwich plate, relief opening.To measure pump flow-induction noise source characteristic is example, and the tank body import connects the water outlet of pump, and outlet links to each other with the pond through turbine flowmeter, valve.The inlet/outlet flange all is processed into flange alive, and direction is the tangential of water pot cross circular section.Water gets into water pot from the tangential of water pot cross circular section, then along under the water pot wall spiral flow, flow out from outlet after advancing the sandwich plate rectification.Pump noise and turbine flowmeter, valve noise are spaced in jar.Tank body top is provided with exhaust port, can be used for controlling the air section height on tank body top.
Working procedure is: the current that contain noise are behind import entering tank body, and change has taken place for the flow direction of water and sonic propagation direction.The two all moves, but intensity is different, speed is different, and noise is a kind of motion of energy, and it turns to main by reflection, and flow direction-changing leans on resistance.Current flow out from outlet after the sandwich plate rectification along under the water pot wall spiral flow.Through repeatedly reflection, acoustic energy is absorbed by water sound in jar, and frequency conversion in jar, decay are up to disappearance.The noise that circulation downstream turbine flowmeter, valve produce is behind the outlet entering jar of jar; Most sound is by sandwich plate reflected back jar bottom, and through repeatedly reflection, acoustic energy is absorbed by water in jar; Decay or interfere with former sound wave in jar is until dyingout.Hole on the porous slab is that equilateral triangle evenly distributes, and porous slab is provided with more than 3 layers, the hole of the different layers 5-10 ° of angle that stagger, and sound also can be absorbed major part in passing through multiple-plate process.After the sound of trace passes sandwich plate,, can produce new interference, resonance, frequency conversion until dyingout owing to belong to two kinds of different noises with pump noise.The height of jar top adjustable air post in system's running; Because water is more much bigger than the acoustic impedance of air; The surface of contact of water and air belongs to bounds, and the sound in the jar can not pass in the pipeline basically, thereby has accomplished the basic isolated of pump noise and downstream components noise.
The invention has the advantages that: sound insulation is reliable, and circulation downstream noise disturbs little to the measurement of upper reaches noise; It is effective to eliminate the noise, integrated use interfere to eliminate the noise, multinomial technology such as frequency conversion decay noise reduction, sandwich plate sound absorption; Easy to process, volume is little.
Description of drawings
Fig. 1: sound insulation, noise elimination jar structure figure.
The plan view of Fig. 2: Fig. 2.
Fig. 3: sandwich plate schematic representation.
Fig. 4: centrifugal pump flow-induction noise testing platform schematic representation.
Among the figure: inlet tube (1), outer pipe (2), relief opening (3), tank body (4), porous slab (5), motor (6), vibration acceleration sensor (7), outlet pressure tap (8), hydrophorce (9), sound insulation, eliminate the noise jar (10), a turbine flowmeter (11), gate valve (12), pond (13), import pressure tap (14), test pump (15).
Embodiment
Test pump (15) operation is extracted out water by pond (13), behind sound insulation, eliminate the noise jar (10), a turbine flowmeter (11), gate valve (12), flow into pond (13) again.The height of relief opening (3) adjustable air post, strong vibration takes place in system under a certain gas content to avoid.Inlet tube (1), outer pipe (2) manufacture the loose flange pipeline.The hole of sandwich plate (5) is equilateral triangle and evenly distributes in radius is the border circular areas of R, leg-of-mutton high h is calculated by the number in hole.Hole between two-ply 5-10 ° the angle that staggers.The noise that test pump (15) produces is separated by sound insulation, eliminate the noise jar (10) with the noise that turbine flowmeter (11), gate valve (12) produce, and has guaranteed that the acoustic signal that hydrophorce (9) records is that test pump (15) produces.
Claims (3)
1. a flow-induction noise acoustical insulation sound-deadening device is characterized in that, comprises inlet tube (1), outer pipe (2), relief opening (3), tank body (4), porous slab (5); Said tank body (4) is a cylindrical container; Said inlet tube (1) is arranged at top and inlet tube (1) axially tangent with tank body (4) outer wall of tank body (4) outer wall, and it is tangent that said outer pipe (2) is arranged at axial and tank body (4) outer wall of bottom and outer pipe (2) of tank body (4) outer wall; Said inlet tube (1) and outer pipe (2) inversion symmetry are arranged; Said porous slab (5) is arranged between interior inlet tube of said tank body (4) (1) and the outer pipe (2); The relief opening (3) of the adjustable air post height of the top design of said tank body (4).
2. a kind of flow-induction noise acoustical insulation sound-deadening device according to claim 1 is characterized in that the flange of said inlet tube (1), outer pipe (2) is loose flange.
3. a kind of flow-induction noise acoustical insulation sound-deadening device according to claim 1 and 2 is characterized in that the hole on the said porous slab (5) is that equilateral triangle evenly distributes, and said porous slab (5) is provided with more than 3 layers, the hole of the different layers 5-10 ° of angle that stagger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210075502.1A CN102620104B (en) | 2012-03-21 | 2012-03-21 | Flow induction noise isolating and muffling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210075502.1A CN102620104B (en) | 2012-03-21 | 2012-03-21 | Flow induction noise isolating and muffling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102620104A true CN102620104A (en) | 2012-08-01 |
| CN102620104B CN102620104B (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210075502.1A Active CN102620104B (en) | 2012-03-21 | 2012-03-21 | Flow induction noise isolating and muffling device |
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| CN (1) | CN102620104B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404749A (en) * | 2021-06-24 | 2021-09-17 | 哈尔滨工程大学 | Underwater jet vortex generator generating device |
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| EP1701084A1 (en) * | 2005-02-03 | 2006-09-13 | Aldes Aeraulique | Box structure for linking between horizontal and vertical ducts of a mechanical ventilation installation of a building |
| CN201628048U (en) * | 2009-12-23 | 2010-11-10 | 厦门建霖工业有限公司 | Water passage silencer |
| CN101975326A (en) * | 2010-10-29 | 2011-02-16 | 太原重工股份有限公司 | Pipe type hydraulic fluid muffler |
| CN202056460U (en) * | 2011-03-23 | 2011-11-30 | 浙江中财管道科技股份有限公司 | Rotary adherence fluid director |
| CN102322935A (en) * | 2011-08-22 | 2012-01-18 | 江苏大学 | Flowing noise measuring device |
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2012
- 2012-03-21 CN CN201210075502.1A patent/CN102620104B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1701084A1 (en) * | 2005-02-03 | 2006-09-13 | Aldes Aeraulique | Box structure for linking between horizontal and vertical ducts of a mechanical ventilation installation of a building |
| CN201628048U (en) * | 2009-12-23 | 2010-11-10 | 厦门建霖工业有限公司 | Water passage silencer |
| CN101975326A (en) * | 2010-10-29 | 2011-02-16 | 太原重工股份有限公司 | Pipe type hydraulic fluid muffler |
| CN202056460U (en) * | 2011-03-23 | 2011-11-30 | 浙江中财管道科技股份有限公司 | Rotary adherence fluid director |
| CN102322935A (en) * | 2011-08-22 | 2012-01-18 | 江苏大学 | Flowing noise measuring device |
Non-Patent Citations (1)
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| 韩宝坤等: "多孔金属材料吸声性能优化分析", 《山东科技大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404749A (en) * | 2021-06-24 | 2021-09-17 | 哈尔滨工程大学 | Underwater jet vortex generator generating device |
| CN113404749B (en) * | 2021-06-24 | 2023-01-03 | 哈尔滨工程大学 | Underwater jet vortex generator generating device |
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| Publication number | Publication date |
|---|---|
| CN102620104B (en) | 2014-10-29 |
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Effective date of registration: 20160608 Address after: 212009 Jiangsu province Zhenjiang new Dingmao Road No. 99 by fifteen University of science and Technology Park 43 Patentee after: Zhenjiang Institute of fluid engineering technology, Jiangsu University Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: Jiangsu University |