CN201177561Y - Frequency adjustable type air inlet silencing apparatus test device - Google Patents
Frequency adjustable type air inlet silencing apparatus test device Download PDFInfo
- Publication number
- CN201177561Y CN201177561Y CNU200820097864XU CN200820097864U CN201177561Y CN 201177561 Y CN201177561 Y CN 201177561Y CN U200820097864X U CNU200820097864X U CN U200820097864XU CN 200820097864 U CN200820097864 U CN 200820097864U CN 201177561 Y CN201177561 Y CN 201177561Y
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Abstract
The utility model relates to a frequency-adjustable intake silencer test device, which comprises a resonant cavity and a connection pipe connected with an intake manifold of an engine, wherein the resonant cavity is composed of a resonant cavity housing and an adjustable partition sealing plate hermetically matched with the inner wall of the resonant cavity housing; a screw-nut adjusting mechanism is further arranged; and the front end of the screw of the adjusting mechanism is connected with the adjustable partition sealing plate to drive the adjustable partition sealing plate to make reciprocating movement. When the device is in use, a nut fastening mechanism is used for fixing a limit plate of the adjusting mechanism, and the adjusting screw makes left-right displacement by rotating the adjusting nut so as to drive the adjustable partition sealing plate to make left-right movement in the resonant cavity, thereby adjusting the cavity of the resonant cavity and finally changing the resonant frequency of the silencer to meet the requirement of a silencing frequency. The device has the advantages of simple structure, easy manufacture, easily-ensured accuracy and convenient resonant frequency adjustment, and can greatly reduce the workload for the trial-manufacture of test samples, and improve the work efficiency.
Description
Technical field
The utility model relates to car engine air admittance noise control experimental technique field, particularly a kind of car engine air admittance noise control test unit.
Background technology
The car engine air admittance noise is one of automobile overriding noise source, and it is bigger with a certain single-frequency noise contribution, common noise-reduction method is to make one or more single-cavity resonance type sound suppressors at this single-frequency noise, reduces the induction noise of automobile by the noise that reduces main frequency.The resonance type muffler device is that a kind of linking by pipeline tapping and Helmholtz acoustic resonance device forms noise elimination structure, and its noise-cancelling theory is to utilize Helmholtz acoustic resonance device sound vibrating system, when the resonant frequency of acoustic resonance device is required frequency of noise elimination, reaches the effect of preferably eliminating the noise.The resonant frequency of acoustic resonance device is
In the formula: f
0Be resonant frequency; L
0Be resonator short tube length, in practicality, generally get effective length and calculate that for the circular section short tube, desirable effective length is L
c+ π d
c/ 4; d
cBe diameter of section, A
cBe the short tube sectional area; V is the resonant cavity volume; L
cLength for neck.The principle sketch of resonance type muffler device as shown in Figure 1.
From following formula as can be known, can determine resonant frequency by regulating resonant cavity volume, short tube length and short tube sectional area, the resonant frequency size is inversely proportional to resonator short tube length and resonant cavity volume, is directly proportional with the short tube sectional area.In induction noise control process of the test, usual way is by making resonance type muffler device exemplar certain single-frequency noise to be carried out major control, but make by hand or the exemplar of rapid shaping is difficult to the requirement of all promising policy frequency of noise elimination, need repetition test test and exemplar to make, increased cost of manufacture and noise control cycle like this.
Summary of the invention
The purpose of this utility model is in the induction noise control process of the test, the resonance type muffler device of trial-production is difficult to the requirement of all promising policy frequency of noise elimination, a kind of frequency-adjustable intake silencer tester is provided, resonance frequency can be regulated, reach good noise reduction, reduce the trial-production of exemplar, both can reduce the noise control cycle, also reduce and control cost.
The technical solution adopted in the utility model is as follows:
The frequency-adjustable intake silencer tester includes resonant cavity and the connecting pipe that is connected with engine aspirating system; Described resonant cavity is made of resonant cavity housing and adjustable isolating seal plate, and adjustable isolating seal plate is that hermetic seal cooperates with resonance cavity shell inwall; Other is provided with the screw-and-nut governor motion, and the screw front end of governor motion connects adjustable isolating seal plate, drives adjustable isolating seal plate and moves back and forth in resonant cavity.
Described screw-and-nut governor motion includes adjusting screw(rod), setting nut and fixed support structure, and setting nut cooperates with adjusting screw(rod), and is installed on the fixed support structure, and fixed support structure and resonant cavity are connected and fixed.
Limiting plate and nut lock mechanism before and after described fixed support structure comprises, limiting plate before and after adjusting screw(rod) passes, setting nut is assemblied between the limiting plate of front and back by rear position margining plate is spacing, nut lock mechanism is connected with resonant cavity, it is how right that nut lock mechanism is provided with, and locks the front limit plate from the side relatively.
Described nut lock mechanism is made up of set nut and double-screw bolt, and nut sleeve is on double-screw bolt, and double-screw bolt is perpendicular to the face that is locked of front limit plate, and the upper end is weldingly fixed on the resonant cavity, and being locked of lower end and front limit plate leaves the gap between the face.
Described adjustable isolating seal plate is made up of two division board intermediate adhesion sealing gaskets, and the center is connected by the adjusting screw(rod) front end of division board set nut and governor motion.
During use, with nut lock mechanism the limiting plate of governor motion is fixed, by the turn setting nut, make adjusting screw(rod) generation left and right displacement, thereby drive adjustable isolating seal plate move left and right in resonant cavity, adjust the volume size of resonant cavity, finally change the resonant frequency of sound suppressor, to reach the requirement of frequency of noise elimination.Connecting pipe is linked to each other with motor intake manifold, promptly formed resonance type muffler device with a certain resonant frequency.
This resonance frequency adjustable single-cavity resonance type intake silencer tester has the adjustable effect of resonance frequency, simple in structure, manufacturing handling ease, and precision is easy to guarantee that resonance frequency is easy to adjust.This device is used for automotive air intake Noise Control strong operability, has greatly reduced the development work of exemplar, has improved work efficiency.
Description of drawings
Fig. 1 Helmholtz resonator schematic diagram
The structural representation of Fig. 2 frequency-adjustable intake silencer tester
Wherein, 1-resonant cavity, 2-housing, 3-division board check nut, 4-division board, 5-sealing gasket, 6-set nut, 7-1-front limit piece, limited block behind the 7-2-, 9-limited block coupling bolt, 10-connecting pipe, 11-adjusting screw(rod), 12-double-screw bolt, 13-setting nut
Embodiment
Shown in accompanying drawing 2, the resonant cavity 1 of this frequency-adjustable intake silencer tester is formed by resonant cavity housing 2 and adjustable insulating seal pad, and an end of resonant cavity 1 has the connecting pipe 10 that is connected with engine aspirating system.The adjustable insulating seal pad by about two division boards 4 and the sealing gasket 5 that is bonded between them constitute, adjustable isolating seal plate is that hermetic seal cooperates with the inwall of resonance cavity shell 2, can about under the drive of governor motion, move back and forth, change the volume size of resonant cavity 1.Governor motion adopts screw-and-nut, by adjusting screw(rod) 11, setting nut 13 and fixed support structure are formed, before fixed support structure comprises, rear position margining plate 7-1,7-2 and set nut 6 and double-screw bolt 12 are formed nut lock mechanism, limiting plate 7-1 before and after adjusting screw(rod) 11 passes, the 7-1 center, front end is by division board check nut 3 and adjustable isolating seal plate center fixation, it is driven, setting nut 13 is enclosed within on the adjusting screw(rod) 11, and be assemblied between front and back limiting plate 7-1 and the 7-2, setting nut 13 is carried out spacing, front and back limiting plate 7-1 and 7-2 are connected and fixed by bolt 9.It is how right that nut lock mechanism is provided with, lock front limit plate 7-1 from the side relatively, its nut 6 is enclosed within on the double-screw bolt 12, and double-screw bolt 12 is perpendicular to the face that is locked of front limit plate 7-1, the upper end is weldingly fixed on the resonant cavity housing 2, and being locked of lower end and front limit plate 7-1 leaves the gap between the face.
Claims (5)
1, frequency-adjustable intake silencer tester includes resonant cavity and the connecting pipe that is connected with engine aspirating system; It is characterized in that: described resonant cavity is made of resonant cavity housing and adjustable isolating seal plate, and adjustable isolating seal plate is that hermetic seal cooperates with resonance cavity shell inwall; Other is provided with the screw-and-nut governor motion, and the screw front end of governor motion connects adjustable isolating seal plate, drives adjustable isolating seal plate and moves in resonant cavity.
2, frequency-adjustable intake silencer tester according to claim 1, it is characterized in that: described screw-and-nut governor motion includes adjusting screw(rod), setting nut and fixed support structure, setting nut cooperates with adjusting screw(rod), and be installed on the fixed support structure, fixed support structure is connected and fixed with the resonance cavity shell.
3, frequency-adjustable intake silencer tester according to claim 2, it is characterized in that: limiting plate and nut lock mechanism before and after described fixed support structure comprises, limiting plate before and after adjusting screw(rod) passes, setting nut is assemblied between the limiting plate of front and back by rear position margining plate is spacing, nut lock mechanism is connected with the resonance cavity shell, it is how right that nut lock mechanism is provided with, and locks the front limit plate from the side relatively.
4, frequency-adjustable intake silencer tester according to claim 3, it is characterized in that: described nut lock mechanism is made up of set nut and double-screw bolt, nut sleeve is on double-screw bolt, double-screw bolt is perpendicular to the face that is locked of front limit plate, the upper end is weldingly fixed on the resonant cavity housing, and being locked of lower end and front limit plate leaves the gap between the face.
5, frequency-adjustable intake silencer tester according to claim 2, it is characterized in that: described adjustable isolating seal plate is made up of two division board intermediate adhesion sealing gaskets, and the center is connected by the adjusting screw(rod) front end of division board set nut and governor motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820097864XU CN201177561Y (en) | 2008-03-24 | 2008-03-24 | Frequency adjustable type air inlet silencing apparatus test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820097864XU CN201177561Y (en) | 2008-03-24 | 2008-03-24 | Frequency adjustable type air inlet silencing apparatus test device |
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| Publication Number | Publication Date |
|---|---|
| CN201177561Y true CN201177561Y (en) | 2009-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820097864XU Expired - Fee Related CN201177561Y (en) | 2008-03-24 | 2008-03-24 | Frequency adjustable type air inlet silencing apparatus test device |
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| CN (1) | CN201177561Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003286A (en) * | 2009-09-01 | 2011-04-06 | 通用电气公司 | Acoustically stiffened gas turbine combustor supply |
| CN102434337A (en) * | 2011-09-28 | 2012-05-02 | 奇瑞汽车股份有限公司 | Resonance silencer with dynamically adjusted silencing frequency |
| CN102678401A (en) * | 2012-05-28 | 2012-09-19 | 奇瑞汽车股份有限公司 | Air intake manifold with auxiliary resonant cavity |
| CN104712470A (en) * | 2013-12-13 | 2015-06-17 | 北汽福田汽车股份有限公司 | Testing device for determining resonant cavity structure of air inlet pipe of air filter |
| CN104832327A (en) * | 2014-11-25 | 2015-08-12 | 北汽福田汽车股份有限公司 | Air inlet pipe assembly for vehicle engine air inlet system and vehicle adopting air inlet pipe assembly |
-
2008
- 2008-03-24 CN CNU200820097864XU patent/CN201177561Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003286A (en) * | 2009-09-01 | 2011-04-06 | 通用电气公司 | Acoustically stiffened gas turbine combustor supply |
| CN102003286B (en) * | 2009-09-01 | 2015-11-25 | 通用电气公司 | The gas turbine combustor supply acoustically strengthened |
| CN102434337A (en) * | 2011-09-28 | 2012-05-02 | 奇瑞汽车股份有限公司 | Resonance silencer with dynamically adjusted silencing frequency |
| CN102678401A (en) * | 2012-05-28 | 2012-09-19 | 奇瑞汽车股份有限公司 | Air intake manifold with auxiliary resonant cavity |
| CN104712470A (en) * | 2013-12-13 | 2015-06-17 | 北汽福田汽车股份有限公司 | Testing device for determining resonant cavity structure of air inlet pipe of air filter |
| CN104832327A (en) * | 2014-11-25 | 2015-08-12 | 北汽福田汽车股份有限公司 | Air inlet pipe assembly for vehicle engine air inlet system and vehicle adopting air inlet pipe assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090107 Termination date: 20120324 |