CN102620104B - Flow induction noise isolating and muffling device - Google Patents
Flow induction noise isolating and muffling device Download PDFInfo
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- CN102620104B CN102620104B CN201210075502.1A CN201210075502A CN102620104B CN 102620104 B CN102620104 B CN 102620104B CN 201210075502 A CN201210075502 A CN 201210075502A CN 102620104 B CN102620104 B CN 102620104B
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- tank body
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- inlet tube
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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 be a kind of eliminate the noise, sound arrester, be applicable to the measurement research of sound source characteristic in water circulation system, while refering in particular to a certain device hydrodynamic noise sound source characteristic in Study system, in isolated system, other parts produce the device of noise interference.
Background technique
In pipe-line system noise control technique, the sound source characteristic that accurately measures each parts is the key that realizes whole pipe-line system " calm type " design.Taking pump flow-induction measurement system of noise as example, it is generally made up of parts such as pump, pipeline, turbine flowmeter, valves, the flowing noise signal measuring at delivery side of pump is the synthetic of pump noise and other parts noise of system, and the impact of eliminating turbine flowmeter and valve noise is that the sound source characteristic of Measurement accuracy pump is necessary.Because sound is fast in water transmission speed, wavelength is longer, traditional muffler desing generally bulky, make trouble, and can only for design several frequency noise reductions, 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 research water circulation system.
Through retrieval, the pot type sound insulation, the silencer that during about measurement flow-induction noise, adopt herein do not have relevant report.
Summary of the invention
The object of the invention is provides a kind of sound insulation, silencer for measuring flow-induction noise source characteristic, interference, resonance, the frequency conversion problem of the sounding (turbine flowmeter, valve) that solves water circulation system downstream unit to part mobile noise to be measured, thus the Measurement accuracy of sound source characteristic completed.
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 as example, tank body import connects the water outlet of pump, and outlet is connected with pond by turbine flowmeter, valve.Inlet/outlet flange is all processed the flange surviving, and direction is the tangential of water pot cross circular section.Water tangentially enters water pot from water pot cross circular section, then along under water pot wall spiral flow, flows out after entering sandwich plate rectification from outlet.Pump noise and turbine flowmeter, valve noise are spaced in tank.Tank body top is provided with exhaust port, can be used for controlling the air section height on tank body top.
Working procedure is: containing noisy current, from import enters tank body, change has occurred for the flow direction of water and sonic propagation direction.The two all moves, but intensity difference, speed difference, noise is a kind of motion of energy, it turns to main by reflection, and flow direction-changing leans on resistance.Current, along under water pot wall spiral flow, flow out from outlet after sandwich plate rectification.Sound is through multiple reflections in tank, and acoustic energy is absorbed by water, and frequency conversion in tank, decay are until disappear.The noise that circulation downstream turbine flowmeter, valve produce enters jar from the outlet of jar, most sound is reflected back jar bottom by sandwich plate, and in tank, through multiple reflections, acoustic energy is absorbed by water, in tank, decay or interfere with former sound wave, until dyingout.Hole on porous slab is that equilateral triangle is uniformly distributed, porous slab establish have three layers above, the hole of the different layers 5-10 ° of angle that stagger, sound also can be absorbed major part passing through in multiple-plate process.The sound of trace is through after sandwich plate, owing to belonging to two kinds of different noises from pump noise, can produce new interference, resonance, frequency conversion until dyingout.The height of jar top adjustable air post in system 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 jar can not pass in pipeline substantially, thereby has completed the basic isolated of pump noise and downstream components noise.
The invention has the advantages that: sound insulation is reliable, and circulation downstream noise is little to the measurements interference of upstream noise; Soundproof effect is good, integrated use interfere eliminate the noise, the multinomial technology such as frequency conversion decay noise reduction, sandwich plate sound absorption; Easy to process, volume is little.
Brief description of the drawings
Fig. 1: sound insulation, noise elimination jar structure figure.
The plan view of Fig. 2: Fig. 2.
Fig. 3: sandwich plate schematic diagram.
Fig. 4: centrifugal pump flow-induction noise testing platform schematic diagram.
In 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, noise elimination tank (10), 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), after sound insulation, noise elimination tank (10), turbine flowmeter (11), gate valve (12), again flow into pond (13).The height of relief opening (3) adjustable air post, to avoid system under a certain gas content that strong vibration occurs.Inlet tube (1), outer pipe (2) manufacture loose flange pipeline.In the border circular areas that the hole of sandwich plate (5) is R at radius, be equilateral triangle and be uniformly distributed, leg-of-mutton high h is calculated by the number in hole.Hole between the two-ply angle of 5-10 ° that staggers.The noise that test pump (15) produces is separated by the tank (10) that insulates against sound, eliminates the noise with the noise that turbine flowmeter (11), gate valve (12) produce, and has ensured 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); Described tank body (4) is cylindrical container, it is tangent that described inlet tube (1) is arranged at the top of tank body (4) outer wall and the outer wall of inlet tube (1) and tank body (4) outer wall, and it is tangent that described outer pipe (2) is arranged at the bottom of tank body (4) outer wall and the outer wall of outer pipe (2) and tank body (4) outer wall; Described inlet tube (1) and outer pipe (2) inversion symmetry are arranged; Described porous slab (5) is arranged between the interior inlet tube of described tank body (4) (1) and outer pipe (2), described porous slab (5) establish have three layers above, the hole of the different layers 5-10 ° of angle that stagger; The top of described tank body (4) is provided with the relief opening (3) of adjustable air post height.
2. a kind of flow-induction noise acoustical insulation sound-deadening device according to claim 1, is characterized in that, the flange of described 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 described porous slab (5) is that equilateral triangle is uniformly distributed.
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 CN102620104A (en) | 2012-08-01 |
| CN102620104B true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404749B (en) * | 2021-06-24 | 2023-01-03 | 哈尔滨工程大学 | Underwater jet vortex generator generating device |
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 |
-
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 |
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| CN102620104A (en) | 2012-08-01 |
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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 |