CN102818711A - Silencer performance testing device - Google Patents
Silencer performance testing device Download PDFInfo
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- CN102818711A CN102818711A CN2012100106435A CN201210010643A CN102818711A CN 102818711 A CN102818711 A CN 102818711A CN 2012100106435 A CN2012100106435 A CN 2012100106435A CN 201210010643 A CN201210010643 A CN 201210010643A CN 102818711 A CN102818711 A CN 102818711A
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Abstract
The invention discloses a silencer performance testing device which comprises a testing pipeline, a control device and a measuring device. The testing pipeline is connected with a fan, a sound source generating device, an inlet microphone group and an outlet microphone group, the inlet microphone group and the outlet microphone group are used for measuring sound pressure at an inlet and an outlet of a silencer, the testing pipeline is provided with a gas flow rate measuring device at the position of an air outlet of the fan, the gas flow rate measuring device is used for measuring gas flow rates, the control device is used for controlling rotation speeds of the fan and controlling the sound source generating device, the measuring device is used for collecting and measuring data, an output end of the gas flow rate measuring device, an input end of the fan and an input end of the sound source generating device are connected with the control device, and output ends of the inlet microphone group and the outlet microphone group are connected with the measuring device. According to the silencer performance testing device, the control device controls the fan to generate a gas flow, the gas flow rate measuring device measures the gas flow rate, the control device controls the sound source generating device to generate noises when the gas flow is stabilized, and a total system can be controlled only by the control device without being simultaneously operated by multiple operators in prior art so that the measuring efficiency and the measuring accuracy are improved.
Description
Technical field
The invention belongs to sound suppressor performance test technical field, relate generally to a kind of acoustic attenuation performance of sound suppressor and device of regenerated noise test measured.
Background technology
Pollution from environmental noise; Be meant that the neighbourhood noise that is produced surpasses the neighbourhood noise emission standard of national regulation; And disturb the phenomenon of other people normal life, working and learning; Along with the raising of industrialization degree, the noise hazard scope enlarges day by day, and adopting sound suppressor is the most effectively noise reduction means that equipment exhaust noises such as Control of Automobile engine, blower fan, air compressor machine generally adopt; Sound suppressor can produce the air-flow regenerated noise in the high velocity air condition; Can reduce the power output of equipment simultaneously, the sound suppressor design is directly connected to power loss, energy resource consumption, the noise elimination effect of equipment, and test is the main method of carrying out the sound suppressor design; The sound suppressor performance test apparatus becomes key; Aspect the research of existing sound suppressor performance test apparatus, what have representative is the internal-combustion engine engineering periodical, the 25th the 4th phase of volume of August in 2004; Chapter numbering: 03 of 1000-0925 (2004) 04-039-is called and discloses a kind of sound suppressor performance test apparatus in " development of internal combustion engine exhaust silencer characteristic test apparatus and application " content and comprise blower fan, noise generation device, heating arrangement, air-flow velocity and temperature control equipment, measuring system, try a sound suppressor and an outlet sound absorption section composition; The outlet air end of blower fan is provided with the blower fan sound suppressor, and blower fan is provided with variable valve and variable-frequence governor, and said measuring system is made up of pitot tube assembly (being with miniature differential manometer), thermopair, temperature indicator, upstream and downstream microphone, microphone amplifier and signal analyzer; Respectively through the sound transmission loss before and after differential static pressure and the sound suppressor before and after the gas velocity in the measuring channel, gas flow temperature, the sound suppressor; Performance to sound suppressor is studied, and this device has been studied air flow status and gas flow temperature to the sound suppressor Effect on Performance, but when testing because noise source and air flow source are not synchro control; Need that many people are artificial simultaneously to participate in, automaticity is low and influence efficiency of measurement and precision.
Summary of the invention
The object of the present invention is to provide a kind of sound suppressor performance test apparatus that can improve test efficiency.
For realizing above-mentioned purpose; The present invention adopts following technical scheme: a kind of sound suppressor performance test apparatus; Comprise the test pipeline; Be connected with blower fan, sound source generation device on the test pipeline, be used to measure the import and export microphone group that sound suppressor is imported and exported the two ends acoustic pressure; The test pipeline also is provided with the air-flow speed measuring device of the gas flow rate that is used in the experiment with measuring pipeline in the air outlet place of blower fan; This device comprises also and is used to control the control device of rotation speed of fan, sound source generation device and is used to collect the also measurement mechanism of measurement data that the input end of the output terminal of air-flow speed measuring device, the input end of blower fan and sound source generation device all is connected with control device, and the output terminal of import and export microphone group is connected with measurement mechanism.
Be provided with the blower fan sound suppressor in the air outlet place of blower fan on the test pipeline.
The endpiece of test pipeline is provided with outlet sound absorption section, and the exit that outlet sound absorption section has by the test pipeline expands outwardly into the bell mouth shape structure.
Described import and export microphone group comprises at least three 1/4th inches microphone respectively.
The test pipeline that is connected between fan outlet place and the air-flow speed measuring device is provided with one section blower fan and is flexible coupling.
Junction between described sound source generation device and the test pipeline is provided with one section sound source and is flexible coupling.
The test pipeline is provided with the two ends that are used for sound suppressor and is connected in the ring flange on the test pipeline.
Described control device and measurement mechanism all adopt PLC control.
A kind of sound suppressor performance test apparatus of the present invention; The air-flow speed measuring device configures gas velocity signal is transferred to control device, by the certain air-flow of rotating speed generation of control device control blower fan, when stablizing through air-flow speed measuring device measurement gas velocity again; Control device guide sound source generating device produces noise; Total system is only controlled by control device and is got final product, and does not need operated simultaneously by many people in the prior art, obviously improves efficiency of measurement and precision.
Further, the microphone group comprises three microphones at least, can realize adopting in the different frequency range two transaudient methods effectively to measure simultaneously, further raises the efficiency.
Further, being flexible coupling of fan outlet can reduce the vibration that is produced by blower fan.
Further, sound source is flexible coupling and can reduces the vibration that is produced by the sound source generation device.
Further, adopt ring flange to connect, make test with sound suppressor can be more firm connection.
Description of drawings
Fig. 1 is the structural representation of embodiments of the invention.
Embodiment
A kind of embodiment of sound suppressor performance test apparatus; As shown in Figure 1; Comprise the test pipeline; Test is connected with the blower fan 1 that has frequency converter 9, sound source generation device 18, tested sound suppressor 7 on the pipeline, be used to measure the import microphone group 19 of sound suppressor 7 import acoustic pressures, be used to measure the outlet microphone group 20 of sound suppressor 7 outlet acoustic pressures; Import and export microphone group comprises three 1/4th inches microphone respectively; The test pipeline that is connected between blower fan 1 air outlet place and the air-flow speed measuring device 10 is provided with one section blower fan and is flexible coupling 3; Blower fan 1 air outlet place is provided with sound insulation vibration damping wall 2, is provided with the air-flow speed measuring device 10 and the blower fan sound suppressor 22 of the gas flow rate that is used in the experiment with measuring pipeline on the test pipeline in the air outlet place of blower fan, sound source generation device 18 with test junction between the pipeline and be provided with one section sound source and be flexible coupling 17; The endpiece of test pipeline is provided with outlet sound absorption section 21; The exit that outlet sound absorption section 21 has by the test pipeline expands outwardly into the bell mouth shape structure, and sound suppressor 7 is communicated on the test pipeline through the import and export ring flange 6,8 that is provided with on the test pipeline, and the ring flange junction is provided with sealing gasket; This device also comprises the control device 15 of the rotating speed that is used to control blower fan 1, sound source generation device 18 and is used to collect and the measurement mechanism 16 of measurement data; The input end of the frequency converter on the output terminal of air-flow speed measuring device 10, the blower fan 1 and the input end of sound source generation device 18 all are connected with control device 15, and the output terminal of import and export microphone group 19,20 is connected with measurement mechanism 16, and control device 15 and measurement mechanism 16 adopt PLC control.
The foregoing description after the speed through air-flow speed measuring device setting air-flow, passes to control device to regulating the frequency converter transmission signals with signal in use at present; Make the flow velocity of regulating the air flow source that Frequency Converter Control produces by blower fan, sound insulation vibration damping wall 2, blower fan are flexible coupling and 3 are used for reducing the vibration that comes from blower fan, and the blower fan sound suppressor is used for reducing the interference noise that comes from blower fan and the test pipe; By the gas velocity in the air-flow speed measuring device experiment with measuring pipeline, behind steady air current in the test pipeline, signal is passed to control device again; Produce noise by control device guide sound source generating device; Sound source is flexible coupling and is used for eliminating the vibration that comes from the sound source generation device, after sound source is stable, obtains sound suppressor turnover, mouthful interior acoustic pressure respectively through the import and export microphone group of testing with sound suppressor import and export place; The value of measuring is transferred to measurement mechanism; Outlet sound absorption section is used for reducing the noise of test with the outlet internal reflection of sound suppressor, because synchro control and measurement can obviously improve efficiency of measurement and precision; Realize two transaudient methods measurements through measurement mechanism, can further obtain the relation of sound suppressor sound transmission loss and sound suppressor air-flow regenerated noise.
In other embodiment, can also blower fan be set on the test pipeline at fan outlet place and be flexible coupling, directly through the test pipeline connection.
In other embodiment, can sound source be set on sound source generation device and the test pipeline and be flexible coupling, directly through the test pipeline connection.
In other embodiment, on the test pipeline ring flange can also be set, adopt the seal sealing in the pipeline through plugging.
In other embodiment, the number of the microphone that comprises in the described microphone group is not limited to above-mentioned three, so those skilled in the art can be arranged to more than three according to the test needs.
Claims (8)
1. sound suppressor performance test apparatus; Comprise the test pipeline; Be connected with blower fan, sound source generation device on the test pipeline, be used to measure the import and export microphone group that sound suppressor is imported and exported the two ends acoustic pressure; It is characterized in that; The test pipeline also is provided with the air-flow speed measuring device of the gas flow rate that is used in the experiment with measuring pipeline in the air outlet place of blower fan; This device comprises also and is used to control the control device of rotation speed of fan, sound source generation device and is used to collect the also measurement mechanism of measurement data that the input end of the output terminal of air-flow speed measuring device, the input end of blower fan and sound source generation device all is connected with control device, and the output terminal of import and export microphone group is connected with measurement mechanism.
2. sound suppressor performance test apparatus according to claim 1 is characterized in that, is provided with the blower fan sound suppressor in the air outlet place of blower fan on the test pipeline.
3. sound suppressor performance test apparatus according to claim 1 is characterized in that, the endpiece of test pipeline is provided with outlet sound absorption section, and the exit that outlet sound absorption section has by the test pipeline expands outwardly into the bell mouth shape structure.
4. sound suppressor performance test apparatus according to claim 1 is characterized in that, described import and export microphone group comprises at least three 1/4th inches microphone respectively.
5. sound suppressor performance test apparatus according to claim 1 is characterized in that, the test pipeline that is connected between fan outlet place and the air-flow speed measuring device is provided with one section blower fan and is flexible coupling.
6. sound suppressor performance test apparatus according to claim 1 is characterized in that, the junction between described sound source generation device and the test pipeline is provided with one section sound source and is flexible coupling.
7. sound suppressor performance test apparatus according to claim 1 is characterized in that, the test pipeline is provided with the two ends that are used for sound suppressor and is connected in the ring flange on the test pipeline.
8. sound suppressor performance test apparatus according to claim 1 is characterized in that, described control device and measurement mechanism all adopt PLC control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210010643.5A CN102818711B (en) | 2012-01-15 | 2012-01-15 | A kind of Muffler Performance test unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210010643.5A CN102818711B (en) | 2012-01-15 | 2012-01-15 | A kind of Muffler Performance test unit |
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| CN102818711A true CN102818711A (en) | 2012-12-12 |
| CN102818711B CN102818711B (en) | 2015-11-04 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277370A (en) * | 2015-11-25 | 2016-01-27 | 山东大学 | Engine exhaust noise off-line simulation test table and test method |
| CN106289753A (en) * | 2016-09-26 | 2017-01-04 | 上海声望声学科技股份有限公司 | A kind of acoustic filter detecting system |
| CN106383035A (en) * | 2016-11-18 | 2017-02-08 | 华晨汽车集团控股有限公司 | Muffler transmission loss testing system and muffler transmission loss testing method for aiming at aerodynamic noise |
| CN106802238A (en) * | 2017-03-15 | 2017-06-06 | 上汽通用汽车有限公司 | The device and measuring method of measurement muffler transmission loss |
| CN106949957A (en) * | 2017-02-14 | 2017-07-14 | 同济大学 | It is a kind of to have the measurement apparatus for flowing silencer element acoustic characteristic and flow behavior under environment |
| CN108535018A (en) * | 2018-04-12 | 2018-09-14 | 天津职业技术师范大学 | A kind of internal combustion engine exhaust silencer case noise radiation test system |
| CN109324119A (en) * | 2018-09-13 | 2019-02-12 | 哈尔滨工程大学 | Muffler Performance test experiments pipeline section |
| CN109448690A (en) * | 2018-09-28 | 2019-03-08 | 天津职业技术师范大学 | Noise impedance test macro and test method in a kind of airflow line |
| CN110823615A (en) * | 2019-10-16 | 2020-02-21 | 中国人民解放军92578部队 | Performance test evaluation system for active and passive composite muffler of ventilation pipeline |
| CN113108895A (en) * | 2021-04-06 | 2021-07-13 | 绍兴市质量技术监督检测院 | High-accuracy complete-elimination detection system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277370A (en) * | 2015-11-25 | 2016-01-27 | 山东大学 | Engine exhaust noise off-line simulation test table and test method |
| CN106289753A (en) * | 2016-09-26 | 2017-01-04 | 上海声望声学科技股份有限公司 | A kind of acoustic filter detecting system |
| CN106383035A (en) * | 2016-11-18 | 2017-02-08 | 华晨汽车集团控股有限公司 | Muffler transmission loss testing system and muffler transmission loss testing method for aiming at aerodynamic noise |
| CN106949957A (en) * | 2017-02-14 | 2017-07-14 | 同济大学 | It is a kind of to have the measurement apparatus for flowing silencer element acoustic characteristic and flow behavior under environment |
| CN106802238A (en) * | 2017-03-15 | 2017-06-06 | 上汽通用汽车有限公司 | The device and measuring method of measurement muffler transmission loss |
| CN108535018A (en) * | 2018-04-12 | 2018-09-14 | 天津职业技术师范大学 | A kind of internal combustion engine exhaust silencer case noise radiation test system |
| CN109324119A (en) * | 2018-09-13 | 2019-02-12 | 哈尔滨工程大学 | Muffler Performance test experiments pipeline section |
| CN109448690A (en) * | 2018-09-28 | 2019-03-08 | 天津职业技术师范大学 | Noise impedance test macro and test method in a kind of airflow line |
| CN110823615A (en) * | 2019-10-16 | 2020-02-21 | 中国人民解放军92578部队 | Performance test evaluation system for active and passive composite muffler of ventilation pipeline |
| CN113108895A (en) * | 2021-04-06 | 2021-07-13 | 绍兴市质量技术监督检测院 | High-accuracy complete-elimination detection system |
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| CN102818711B (en) | 2015-11-04 |
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Inventor after: Zhao Haijun Inventor after: Li Hongliang Inventor before: Zhao Haijun |
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Effective date of registration: 20180420 Address after: 300222 Dagu South Road, Jinnan District, No. 1310, No. Patentee after: Tianjin University of Technology and Education Address before: 471023 Jianxi District Zhujianglu Road, Luoyang, Henan Patentee before: Luoyang Institute Of Science And Technology |
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