CN203337365U - Automobile muffler transmission loss testing system - Google Patents
Automobile muffler transmission loss testing system Download PDFInfo
- Publication number
- CN203337365U CN203337365U CN2013202358341U CN201320235834U CN203337365U CN 203337365 U CN203337365 U CN 203337365U CN 2013202358341 U CN2013202358341 U CN 2013202358341U CN 201320235834 U CN201320235834 U CN 201320235834U CN 203337365 U CN203337365 U CN 203337365U
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- China
- Prior art keywords
- muffler
- transmission loss
- guide pipe
- automobile
- end cover
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Exhaust Silencers (AREA)
Abstract
The utility model provides an automobile muffler transmission loss testing system. The system is provided to solve the problems that currently a software simulation analysis means and an on-vehicle testing means are mainly adopted for performance evaluation of an intake muffler or an exhaust muffler; and a transmission loss testing device characterized by simple rapid and repeatable contrast is still not existent. The technical points of the automobile muffler transmission loss testing system are that a power amplifier is connected with a loudspeaker; the loudspeaker is corresponding to a front end cover; the front end cover is in threaded connection of the input port of a front guide pipe; The output port of the front guide pipe is provided with a front docking pipe connected with one end of the muffler; the input port of a rear guide pipe is provided with a rear docking pipe connected with the other end of the muffler; the output port of the rear guide pipe is in threaded connection with a rear end cover; a noise reduction layer is fixed inside the rear end cover; and both the front guide pipe and the rear guide pipe are arranged on a guide pipe support. The automobile muffler transmission loss testing system achieves transmission loss measurement of the automobile intake muffler or the automobile exhaust muffler by adopting standing wave pipes and data acquisition equipment.
Description
Technical field
The utility model relates to automobile power acoustical behavior test macro, especially a kind of automotive muffler transmission loss test macro.
Background technology
Along with social development, automobile has become an indispensable part in people's daily life, and the automobile noise pollution problem is following, and corresponding the automobile noise control rules are also more and more stricter.The engine breathing noise is the Main Noise Sources of automobile, adopt sound suppressor rational in infrastructure be reduce in the car load car external noise the most effectively, the simplest approach.
Eliminating noise is one of topmost function of silencer element, when gas handling system of design or exhaust system, must select silencer element according to the noisiness at air intake opening and exhaust tail mouth of pipe place.A silencer element is often used for reducing the noise of certain frequency or certain frequency range, so it is extremely important to understand the soundproof effect of discrete component.
Mainly use at present the means of software simulation analysis and entrucking test for the performance evaluation of intake and exhaust sound suppressor, lack a kind of transmission loss test macro that can carry out simple and fast, can repeat contrast.
Summary of the invention
The purpose of this utility model is to provide a kind of automotive muffler transmission loss test macro.
The technical solution of the utility model is: it comprises dummy pipe, rear tube, microphone, data collector, power amplifier and loudspeaker, it is characterized in that: power amplifier is connected with loudspeaker, loudspeaker is corresponding with front end end cover, front end end cover is threaded with the input port of dummy pipe, the equipped at outlet port of dummy pipe is with the front butt tube be connected with sound suppressor one end, the place, input port of rear tube is with the rear butt tube be connected with the sound suppressor other end, the delivery outlet of rear tube is threaded with rear end cap, is fixed with the noise reduction layer in rear end cap; Dummy pipe and rear tube all are erected on conductor bracing, and described conductor bracing is comprised of bearing and support, and support is threaded with bearing by screw rod; The tandem docking pipe is provided with adjustment ring, is provided with two microphones on the conduit of front and back, and microphone is connected with data collector.Data collector records the microphone test figure, by the data analysis software of writing, calculates the transmission loss of unit under test.Described sound suppressor is air inlet or exhaust silencer.
The beneficial effects of the utility model are: adopt standing wave tube and data acquisition equipment to realize the measurement of automobile intake and exhaust sound suppressor transmission loss, this testing apparatus is simple in structure, simple operation, measuring accuracy is high, production and processing is easy, with low cost, the hommization of system operation interface, easy operating, can be widely used in exploitation and the performance evaluation of automobile industry air inlet system and exhaust system.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the dummy pipe structural drawing;
Fig. 3 is the rear tube structural drawing;
Fig. 4 is the support front view;
Fig. 5 is the bracket side view.
Embodiment
Referring to Fig. 1, power amplifier 14 is connected with loudspeaker 1, referring to Fig. 2, loudspeaker is corresponding with front end end cover 101, and front end end cover is threaded with the input port of dummy pipe 2, and an end of the delivery outlet of dummy pipe and air inlet or exhaust silencer 7 inserts in front butt tube 6, insert in rear butt tube 8 input port of the other end of air inlet or exhaust silencer and rear tube 9, referring to Fig. 3, at the delivery outlet of rear tube, with rear end cap 11, be threaded, fixing noise reduction layer 10 in rear end cap; Dummy pipe and rear tube all are erected on conductor bracing, and described conductor bracing is comprised of bearing 3 and support 4; The tandem docking pipe is provided with adjustment ring 8, is provided with two microphones 13 on the conduit of front and back, and microphone is connected with data collector 12.Referring to Fig. 4 ~ 5, bearing 3 is connected with support 4 by screw rod 303, and screw rod 303 can move up and down along support slideway 301, and screw rod 303 is fixedly connected with support 4 by set nut 302.
Conduit should be straight, and its cross-sectional area should be even, and tube wall is answered surface smoothing, firm, avoids producing resonance in standing wave tube frequency of operation section, therefore advises that wall thickness is taken as 5% left and right of caliber.
According to the characteristics of automobile air inlet system and exhaust system, the frequency of operation lower limit of test macro is not higher than 125Hz, and the upper limit is not less than 4000Hz.
Pipe carrier is connected by threaded rod with support, and the support both sides are provided with slideway, by regulating the position of threaded rod in slideway, can adapt to different intake and exhaust sound suppressor installation site requirements.
Rear tube and rear end cap are threaded connection, and are convenient to dismounting and change the sound-absorbing packing material.Front end end cover adopts and is threaded with dummy pipe.
Before and after conduit with air inlet system and exhaust system, by butt tube, be connected, butt tube is furnished with the adjustment ring of different size, and passes through being connected of the fastening butt tube of snap ring and air inlet system and exhaust system, to adapt to the intake and exhaust sound suppressor of different pore size.
During test, tested intake and exhaust sound suppressor is connected with the front and back conduit, conduit setting height(from bottom) before and after adjusting by support 3, regulating the sound suppressor port by adjustment ring coordinates with butt tube, fastening by snap ring, send white noise by loudspeaker, form the plane standing-wave sound field through acoustic conducting pipe, microphone by 4 diverse locations is gathered voice signal, obtains the transmission loss of tested sound suppressor by analysis software.
Claims (2)
1. an automotive muffler transmission loss test macro, it comprises dummy pipe, rear tube, microphone, data collector, power amplifier and loudspeaker, it is characterized in that: power amplifier is connected with loudspeaker, loudspeaker is corresponding with front end end cover, front end end cover is threaded with the input port of dummy pipe, the equipped at outlet port of dummy pipe is with the front butt tube be connected with sound suppressor one end, the place, input port of rear tube is with the rear butt tube be connected with the sound suppressor other end, the delivery outlet of rear tube is threaded with rear end cap, is fixed with the noise reduction layer in rear end cap; Dummy pipe and rear tube all are erected on conductor bracing, and described conductor bracing is comprised of bearing and support, and support is threaded with bearing by screw rod; The tandem docking pipe is provided with adjustment ring, is provided with two microphones on the conduit of front and back, and microphone is connected with data collector.
2. automotive muffler transmission loss test macro according to claim 1, it is characterized in that: described sound suppressor is air inlet or exhaust silencer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202358341U CN203337365U (en) | 2013-05-03 | 2013-05-03 | Automobile muffler transmission loss testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202358341U CN203337365U (en) | 2013-05-03 | 2013-05-03 | Automobile muffler transmission loss testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203337365U true CN203337365U (en) | 2013-12-11 |
Family
ID=49706034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202358341U Expired - Fee Related CN203337365U (en) | 2013-05-03 | 2013-05-03 | Automobile muffler transmission loss testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203337365U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969071A (en) * | 2014-05-09 | 2014-08-06 | 同济大学 | Method and device for measuring noise reduction amount and pressure loss of silencer |
| CN105203316A (en) * | 2015-10-22 | 2015-12-30 | 清华大学苏州汽车研究院（相城） | Testing device and testing method of transmission loss of high-precision double-discharge-opening silencer |
| 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 |
| CN109752151A (en) * | 2018-12-30 | 2019-05-14 | 珠海市广源信科技有限公司 | A kind of muffler measuring device |
| CN109765041A (en) * | 2019-01-07 | 2019-05-17 | 珠海市广源信科技有限公司 | A kind of muffler measuring system |
-
2013
- 2013-05-03 CN CN2013202358341U patent/CN203337365U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969071A (en) * | 2014-05-09 | 2014-08-06 | 同济大学 | Method and device for measuring noise reduction amount and pressure loss of silencer |
| CN103969071B (en) * | 2014-05-09 | 2016-06-29 | 同济大学 | The measuring method of acoustic filter sound deadening capacity and the pressure loss and measurement apparatus thereof |
| CN105203316A (en) * | 2015-10-22 | 2015-12-30 | 清华大学苏州汽车研究院（相城） | Testing device and testing method of transmission loss of high-precision double-discharge-opening silencer |
| CN105203316B (en) * | 2015-10-22 | 2018-11-13 | 清华大学苏州汽车研究院（相城） | A kind of double mouth silencer of high-precision transmits loss experimental rig and test method |
| 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 |
| CN109752151A (en) * | 2018-12-30 | 2019-05-14 | 珠海市广源信科技有限公司 | A kind of muffler measuring device |
| CN109765041A (en) * | 2019-01-07 | 2019-05-17 | 珠海市广源信科技有限公司 | A kind of muffler measuring system |
| CN109765041B (en) * | 2019-01-07 | 2021-03-30 | 珠海市广源信科技有限公司 | Silencer measurement system |
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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: 20131211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |