CN202420891U - Performance test device of silencer - Google Patents
Performance test device of silencer Download PDFInfo
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- CN202420891U CN202420891U CN2012200158539U CN201220015853U CN202420891U CN 202420891 U CN202420891 U CN 202420891U CN 2012200158539 U CN2012200158539 U CN 2012200158539U CN 201220015853 U CN201220015853 U CN 201220015853U CN 202420891 U CN202420891 U CN 202420891U
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- pipeline
- blower fan
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Abstract
The utility model discloses a performance test device of a silencer, and the performance test device comprises a test pipeline, wherein the test pipeline is connected with a fan, a sound source generating device and an inlet/outlet microphone group for measuring sound pressures of two ends of the inlet and outlet of the silencer; the part, at the air outlet of the fan, of the test pipeline is further provided with an air flow speed measuring device for measuring the air flow speed; the device further comprises a control device for controlling the rotating speed of the fan and the sound source generating device, and collecting and measuring data; the output end of the air flow speed measuring device, the input end of the fan and the input end of the sound source generating device are connected with the control device; and the output end of the inlet/outlet microphone group is connected with the measuring device. The performance test device of the silencer controls the fan to generate an air flow by virtue of the control device and the speed of the air flow is measured by the air flow speed measuring device; after the air flow is stable, the control device controls the sound source generating device to generate noises and the whole system is only controlled by the control device; and compared with the prior art, the performance test device does not need to be simultaneously operated by a plurality of people, so that the measuring efficiency and the measuring precision are obviously improved.
Description
Technical field
The utility model belongs to sound suppressor performance test technical field, relates 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.
The utility model content
The purpose of the utility model is to provide the sound suppressor that can improve test efficiency performance test apparatus.
For realizing above-mentioned purpose; The utility model adopts following technical scheme: the 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.
The sound suppressor performance test apparatus of the utility model; 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 the embodiment of the utility model.
Embodiment
The 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 |
|---|---|---|---|
| CN2012200158539U CN202420891U (en) | 2012-01-15 | 2012-01-15 | Performance test device of silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200158539U CN202420891U (en) | 2012-01-15 | 2012-01-15 | Performance test device of silencer |
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| Publication Number | Publication Date |
|---|---|
| CN202420891U true CN202420891U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200158539U Expired - Fee Related CN202420891U (en) | 2012-01-15 | 2012-01-15 | Performance test device of silencer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818711A (en) * | 2012-01-15 | 2012-12-12 | 洛阳理工学院 | Silencer performance testing device |
| CN102928230A (en) * | 2012-10-31 | 2013-02-13 | 芜湖市顺昌汽车配件有限公司 | Bench test device of automobile engine air intake system |
| CN103048153A (en) * | 2012-12-10 | 2013-04-17 | 中国飞机强度研究所 | Experiment system for cylindrical structure acoustic performance test |
| CN107490473A (en) * | 2017-08-31 | 2017-12-19 | 哈尔滨工程大学 | A kind of silencer test device based on gas flow temperature and flow matches |
| 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 |
| IT201800003242A1 (en) * | 2018-03-02 | 2019-09-02 | Assing S P A | MICROPHONE QUALITY CONTROL SYSTEM FOR DETECTION OF ANOMALIES ON MECHANICAL ASSEMBLIES IN PRODUCTION ENVIRONMENTS |
| 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 |
-
2012
- 2012-01-15 CN CN2012200158539U patent/CN202420891U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818711A (en) * | 2012-01-15 | 2012-12-12 | 洛阳理工学院 | Silencer performance testing device |
| CN102818711B (en) * | 2012-01-15 | 2015-11-04 | 洛阳理工学院 | A kind of Muffler Performance test unit |
| CN102928230A (en) * | 2012-10-31 | 2013-02-13 | 芜湖市顺昌汽车配件有限公司 | Bench test device of automobile engine air intake system |
| CN103048153A (en) * | 2012-12-10 | 2013-04-17 | 中国飞机强度研究所 | Experiment system for cylindrical structure acoustic performance test |
| CN107490473A (en) * | 2017-08-31 | 2017-12-19 | 哈尔滨工程大学 | A kind of silencer test device based on gas flow temperature and flow matches |
| CN107490473B (en) * | 2017-08-31 | 2020-02-14 | 哈尔滨工程大学 | Silencer testing arrangement based on air current temperature and flow match |
| IT201800003242A1 (en) * | 2018-03-02 | 2019-09-02 | Assing S P A | MICROPHONE QUALITY CONTROL SYSTEM FOR DETECTION OF ANOMALIES ON MECHANICAL ASSEMBLIES IN PRODUCTION ENVIRONMENTS |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20150115 |
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| EXPY | Termination of patent right or utility model |