CN104832625A - Muffler device for transmission shaft of anechoic chamber - Google Patents
Muffler device for transmission shaft of anechoic chamber Download PDFInfo
- Publication number
- CN104832625A CN104832625A CN201410796200.2A CN201410796200A CN104832625A CN 104832625 A CN104832625 A CN 104832625A CN 201410796200 A CN201410796200 A CN 201410796200A CN 104832625 A CN104832625 A CN 104832625A
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- anechoic room
- noise elimination
- room transmission
- silencer according
- Prior art date
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/0018—Shaft assemblies for gearings
Abstract
The present invention discloses a muffler device for a transmission shaft of an anechoic chamber. The muffler device comprises a hollow columnar muffling part (100), wherein the muffling part (100) comprises a first sound absorption layer (101), a sound insulation layer (102) and a second sound absorption layer (103); and the first sound absorption layer (101), the sound insulation layer (102) and the second sound absorption layer (103) are sequentially arranged from inside to outside in the radial direction of the muffling part (100). According to the muffler device disclosed by the present invention, the muffling part (100) comprises two sound absorption layers and the sound insulation plate (102) is clamped between the two sound absorption layers, so that design that a conventional muffler device simply adopts the sound absorption layer is broken through, the muffling strategy of sound absorption, sound insulation and sound absorption is realized, and the muffling performance is greatly improved; and the muffler device effectively guarantees that noises of the transmission shaft are not transferred into the anechoic chamber.
Description
Technical field
The present invention relates to noise control technique field, particularly, relate to a kind of anechoic room transmission shaft silencer.
Background technique
Anechoic room sets up free field exactly in a closed space, and in this space, the homogeneous media ground of conduct acoustic waves infinitely extends to all directions, the acoustic energy of sound source radiation is freely propagated, i.e. the reflection of clear, also without the interference of ambient noise.
A special experimental laboratory of acoustical testing is not only by anechoic room, and is the important component part of test system, and in fact it is also one of acoustic test equipment.Noise floor value is the most important acoustical behavior index of anechoic room, the precision of directly impact test.In the anechoic room construction of electronic product noise testing, the next door of anechoic room is the power house being provided with motor and relevant device, by the transmission of transmission shaft for the tested electronic product in anechoic room provides power.When the motor of power house and relevant device work, its noise enters in anechoic room by transmission shaft and wall hole, directly affects the noise floor value of anechoic room.If the noise transmission of transmission shaft can not be intercepted, will greatly affect the acoustics index of electronic product noise testing.
Summary of the invention
The object of this invention is to provide the better anechoic room transmission shaft silencer of a kind of acoustic attenuation performance.
To achieve these goals, the invention provides a kind of anechoic room transmission shaft silencer, comprise the noise elimination portion in hollow columnar, wherein, described noise elimination portion comprises the first absorbent treatment, Sound insulating layer and the second absorbent treatment, and this first absorbent treatment, Sound insulating layer and the second absorbent treatment are from inside to outside arranged successively along the radial direction in described noise elimination portion.
In silencer of the present invention, because noise elimination portion comprises two-layer absorbent treatment, and accompany sound insulationg board between this two-layer absorbent treatment, breach the design that traditional silencer adopts merely absorbent treatment, achieve the noise elimination strategy of sound absorption-sound insulation-sound absorption, drastically increase acoustic attenuation performance, effectively ensure that the noise of transmission shaft can not be delivered in anechoic room.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the stereogram be arranged on according to the anechoic room transmission shaft silencer of one embodiment of the present invention on transmission shaft, and wherein, noise elimination portion is in closed state;
Fig. 2 is the stereogram be arranged on according to the anechoic room transmission shaft silencer of one embodiment of the present invention on transmission shaft, and wherein, noise elimination portion is in open mode;
Fig. 3 is the plan view be arranged on according to the anechoic room transmission shaft silencer of one embodiment of the present invention on transmission shaft, and wherein, noise elimination portion is in closed state;
Fig. 4 is the sectional view intercepted along the A-A line in Fig. 3;
Fig. 5 is the sectional view intercepted along the B-B line in Fig. 3;
Fig. 6 is the partial enlarged drawing of Fig. 4.
Description of reference numerals
100 noise elimination portion 110 upper half part 120 lower half portions
101 first absorbent treatment 102 Sound insulating layer 103 second absorbent treatments
200 support 300 base 400 gears
500 tooth bar 600 roller 700 fitting seats
800 installation shaft 900 handlebar 1000 transmission shafts
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality of use is upper and lower under normal operating condition of anechoic room transmission shaft silencer of the present invention as " upper and lower " typically refers to, specifically can with reference to the page of accompanying drawing.
The invention provides a kind of anechoic room transmission shaft silencer, as shown in Figures 3 to 5, comprise the noise elimination portion 100 in hollow columnar, this noise elimination portion 100 comprises the first absorbent treatment 101, Sound insulating layer 102 and the second absorbent treatment 103, and this first absorbent treatment 101, Sound insulating layer 102 and the second absorbent treatment 103 are from inside to outside arranged successively along the radial direction in noise elimination portion 100.
In silencer of the present invention, because noise elimination portion 100 comprises two-layer absorbent treatment, and accompany sound insulationg board 102 between this two-layer absorbent treatment, breach the design that traditional silencer adopts merely absorbent treatment, achieve the noise elimination strategy of sound absorption-sound insulation-sound absorption, drastically increase acoustic attenuation performance, effectively ensure that the noise of transmission shaft 1000 can not be delivered in anechoic room.
First absorbent treatment 101 and the second absorbent treatment 103 can have various suitable structure respectively.As a kind of mode of execution, the first absorbent treatment 101 and the second absorbent treatment 103 can have identical structure, and comprise the hollow shell be made up of expanded metal respectively, and are filled in the sound-absorbing material in this hollow shell.
Here, sound-absorbing material can be the material of arbitrarily suitably type, such as, sound-absorbing material can be selected from the group be made up of foamed plastics, softboard, flax board, compression glass silk floss, felt one or more.
Sound insulating layer 102 can have various suitable structure.As a kind of mode of execution, Sound insulating layer 102 can be steel plate, stereotype or rubber plate.Here, in order to ensure the defening effect of Sound insulating layer 102, Sound insulating layer 102 should be solid plate, but not it forms pertusate plate.
For the ease of noise elimination portion 100 is sleeved on transmission shaft 1000, preferably, noise elimination portion 100 can comprise upper half part 110 and lower half portion 120, form hollow columnar when this upper half part 110 and lower half portion 120 close, upper half part 110 and lower half portion 120 can by together with the chain connections that are arranged on its radial edges.In order to support lower half portion 120, silencer of the present invention can also comprise base 300, and this base 300 is supported on the below of lower half portion 120.
In order to the transmission shaft 1000 of different heights can be adapted to, preferably, noise elimination portion 100 is Height Adjustable.
The Height Adjustable of noise elimination portion 100 can be realized by various structures.As a kind of mode of execution, the bottom in noise elimination portion 100 can be provided with support 200, and the one in base 300 and support 200 is provided with gear 400, and another one is provided with the tooth bar 500 of downward-extension, gear 400 is engaged on tooth bar 500.Here, actuation gear 400 rotates the lifting that can realize noise elimination portion 100.
Can rotate by actuation gear 400 in several ways, such as, the motor being used for actuation gear 400 can be set on base 300.
In the embodiment that is shown in figure 6, support 200 is provided with fitting seat 700, gear 400 is fixed in installation shaft 800, the two ends of installation shaft 800 are installed in rotation on fitting seat 700, silencer also comprises handlebar 900, handlebar 900 is connected with installation shaft 800 or is integrally formed, and can be rotated by driven gear 400 by handle with sleeve bar 900.In this case, between gear 400 and tooth bar 500, should self-locking mechanism be set, rolls downwards under gravity to prevent gear 400.
In order to make noise elimination portion 100 more stably be supported on base 300, preferably, as shown in Figure 3, silencer can comprise two supports, 200, two supports 200 and arranges along the axially spaced-apart in noise elimination portion 100.Preferably, two supports 200 can between two tooth bars 500, to limit base 300 moving axially along noise elimination portion 100.
Because the volume of silencer is large, weight large, the conveniently movement of silencer, improve utilization efficiency, preferably, the below of base 300 can be provided with roller 600.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. an anechoic room transmission shaft silencer, comprise the noise elimination portion (100) in hollow columnar, it is characterized in that, described noise elimination portion (100) comprises the first absorbent treatment (101), Sound insulating layer (102) and the second absorbent treatment (103), and this first absorbent treatment (101), Sound insulating layer (102) and the second absorbent treatment (103) are from inside to outside arranged successively along the radial direction of described noise elimination portion (100).
2. anechoic room transmission shaft silencer according to claim 1, it is characterized in that, described first absorbent treatment (101) is identical with the second absorbent treatment (103) structure, comprise the hollow shell be made up of expanded metal respectively, and be filled in the sound-absorbing material in this hollow shell.
3. anechoic room transmission shaft silencer according to claim 2, is characterized in that, described sound-absorbing material be selected from the group be made up of foamed plastics, softboard, flax board, compression glass silk floss, felt one or more.
4. anechoic room transmission shaft silencer according to claim 1, is characterized in that, described Sound insulating layer (102) is steel plate, stereotype or rubber plate.
5. anechoic room transmission shaft silencer according to claim 1, described noise elimination portion (100) comprises upper half part (110) and lower half portion (120) of being connected through the hinge, this upper half part (110) and lower half portion (120) closed formation hollow columnar, described silencer also comprises base (300), and this base (300) is supported on the below of described lower half portion (120).
6. anechoic room transmission shaft silencer according to claim 5, is characterized in that, described noise elimination portion (100) Height Adjustable.
7. anechoic room transmission shaft silencer according to claim 6, it is characterized in that, the bottom of described noise elimination portion (100) is provided with support (200), one in described base (300) and support (200) is provided with gear (400), another one is provided with the tooth bar (500) of downward-extension, described gear (400) is engaged on described tooth bar (500).
8. anechoic room transmission shaft silencer according to claim 7, it is characterized in that, described silencer comprises two described supports (200), two described supports (200) are arranged along the axially spaced-apart of described noise elimination portion (100), described base (300) are provided with two described tooth bars (500).
9. anechoic room transmission shaft silencer according to claim 8, is characterized in that, two described supports (200) are positioned between two described tooth bars (500).
10. anechoic room transmission shaft silencer according to claim 8, is characterized in that, the below of described base (300) is provided with roller (600).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796200.2A CN104832625B (en) | 2014-12-18 | 2014-12-18 | Anechoic room transmission shaft silencing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796200.2A CN104832625B (en) | 2014-12-18 | 2014-12-18 | Anechoic room transmission shaft silencing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104832625A true CN104832625A (en) | 2015-08-12 |
| CN104832625B CN104832625B (en) | 2018-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410796200.2A Active CN104832625B (en) | 2014-12-18 | 2014-12-18 | Anechoic room transmission shaft silencing apparatus |
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| Country | Link |
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| CN (1) | CN104832625B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738057A (en) * | 2019-01-24 | 2019-05-10 | 吉孚动力技术(中国)有限公司 | New-energy automobile electric drive assembly noise test equipment and its test method |
| CN109741726A (en) * | 2018-12-27 | 2019-05-10 | 西安交通大学 | A kind of super surface apparatus of collaboration coupled double-layer sheet-type acoustics |
| CN110987472A (en) * | 2019-12-16 | 2020-04-10 | 中国汽车工程研究院股份有限公司 | Bearing seat noise processing system for NVH test of pure electric vehicle electric drive system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2590122Y (en) * | 2002-12-23 | 2003-12-03 | 中原石油勘探局钻井二公司 | Celotex board for petroleum drilling |
| CN201134247Y (en) * | 2007-06-15 | 2008-10-15 | 王磊 | Construction of composite layer for sound insulating and absorbing |
| CN201315153Y (en) * | 2008-12-19 | 2009-09-23 | 哈尔滨太阳岛船艇科技开发有限责任公司 | Sound insulation device made of composite materials in engine compartment |
| CN201804554U (en) * | 2010-07-20 | 2011-04-20 | 海信（山东）空调有限公司 | Sound insulating pad and household electrical appliance |
| CN202141522U (en) * | 2011-06-07 | 2012-02-08 | 北汽福田汽车股份有限公司 | Power assembly test room with silencing and sound-insulating system |
| CN103674228A (en) * | 2012-09-26 | 2014-03-26 | 北汽福田汽车股份有限公司 | Sound damping and vibration reducing system |
-
2014
- 2014-12-18 CN CN201410796200.2A patent/CN104832625B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2590122Y (en) * | 2002-12-23 | 2003-12-03 | 中原石油勘探局钻井二公司 | Celotex board for petroleum drilling |
| CN201134247Y (en) * | 2007-06-15 | 2008-10-15 | 王磊 | Construction of composite layer for sound insulating and absorbing |
| CN201315153Y (en) * | 2008-12-19 | 2009-09-23 | 哈尔滨太阳岛船艇科技开发有限责任公司 | Sound insulation device made of composite materials in engine compartment |
| CN201804554U (en) * | 2010-07-20 | 2011-04-20 | 海信（山东）空调有限公司 | Sound insulating pad and household electrical appliance |
| CN202141522U (en) * | 2011-06-07 | 2012-02-08 | 北汽福田汽车股份有限公司 | Power assembly test room with silencing and sound-insulating system |
| CN103674228A (en) * | 2012-09-26 | 2014-03-26 | 北汽福田汽车股份有限公司 | Sound damping and vibration reducing system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741726A (en) * | 2018-12-27 | 2019-05-10 | 西安交通大学 | A kind of super surface apparatus of collaboration coupled double-layer sheet-type acoustics |
| CN109738057A (en) * | 2019-01-24 | 2019-05-10 | 吉孚动力技术(中国)有限公司 | New-energy automobile electric drive assembly noise test equipment and its test method |
| CN110987472A (en) * | 2019-12-16 | 2020-04-10 | 中国汽车工程研究院股份有限公司 | Bearing seat noise processing system for NVH test of pure electric vehicle electric drive system |
| CN110987472B (en) * | 2019-12-16 | 2021-02-02 | 中国汽车工程研究院股份有限公司 | Bearing seat noise processing system for NVH test of pure electric vehicle electric drive system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104832625B (en) | 2018-09-14 |
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Address after: 102206, Beijing, Shahe, Changping District Town, Sha Yang Road, Lao Wan Village North Patentee after: Beiqi Futian Automobile Co., Ltd. Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Patentee before: Beiqi Futian Automobile Co., Ltd. |