CN103674228A - Sound damping and vibration reducing system - Google Patents
Sound damping and vibration reducing system Download PDFInfo
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- CN103674228A CN103674228A CN201210363883.3A CN201210363883A CN103674228A CN 103674228 A CN103674228 A CN 103674228A CN 201210363883 A CN201210363883 A CN 201210363883A CN 103674228 A CN103674228 A CN 103674228A
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- elastic shaft
- steel plate
- noise elimination
- damping system
- vibration
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Abstract
The invention relates to the technical field of mechanical noise test and particularly relates to a sound damping and vibration reducing system. The invention provides a sound damping and vibration reducing system which includes a muffler and an elastic shaft, wherein the muffler is sleeved on the elastic shaft. Thus, noise generated due to high-speed rotation of the elastic shaft can be eliminated, and the muffler can absorb the noise generated by the elastic shaft, namely, the noise generated due to high-speed rotation of a shafting is reduced and eliminated, and meanwhile, reflection of the shafting on noise in a semi-anechoic chamber or an anechoic chamber can be eliminated, and the influence of a transmission system to the free sound field characteristics of the anechoic chamber can be reduced or eliminated.
Description
Technical field
The present invention relates to mechanical noise technical field of measurement and test, relate in particular to a kind of silencing vibration-damping system.
Background technology
In semianechoic room or anechoic room, the kinematic train that dynamometer machine or motor are connected with testpieces, under High Rotation Speed, easily produce vibration and hum, and these vibrations and hum can disturb the free found field characteristic of semianechoic room or anechoic room, affect the needs of the noise testings such as engine, wheel box, power assembly (engine, wheel box and back axle), motor.
Therefore,, for above deficiency, the invention provides a kind of silencing vibration-damping system.
Summary of the invention
(1) technical matters that will solve
The object of the invention is to solve the kinematic train that existing dynamometer machine or motor are connected with testpieces, under High Rotation Speed, easily produce vibration and hum, thereby affect the problem of noise testing.
(2) technical scheme
For achieving the above object, the invention provides a kind of silencing vibration-damping system, this vibration insulating system comprises sound suppressor and elastic shaft, described sound suppressor is set on elastic shaft.
Wherein, described sound suppressor is three-decker, comprises interior entrant sound noise elimination punched steel plate, absorbent treatment and outer entrant sound noise elimination punched steel plate; Described absorbent treatment is filled between interior entrant sound noise elimination punched steel plate and outer entrant sound noise elimination punched steel plate.
Wherein, in the Thickness Ratio of described absorbent treatment, the thickness of entrant sound noise elimination punched steel plate and outer entrant sound noise elimination punched steel plate is thick.
Wherein, described absorbent treatment is made by acoustic absorbant.
Wherein, one or more in described acoustic absorbant employing polyfoam, softboard, flax board, compression glass silk floss, felt are made.
Wherein, described elastic shaft is double layer hollow circular shaft, and internal layer adopts sheet steel to make, and the outer carbon fiber that adopts is made.
Wherein, described elastic shaft two ends connect diaphragm coupling or coupling flange.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: silencing vibration-damping system provided by the invention, this vibration insulating system is set in sound suppressor on elastic shaft, can eliminate the noise being produced by elastic shaft High Rotation Speed like this, and sound suppressor can absorb the noise that elastic shaft produces, reducing and having eliminated axle is the noise that High Rotation Speed produces, can eliminate the reflection of axle system to semianechoic room or noise elimination room noise simultaneously, play and reduce or eliminate the impact of kinematic train on the free found field characteristic of anechoic room.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram of embodiment of the present invention silencing vibration-damping system;
Fig. 2 is the structural sheet schematic diagram of embodiment of the present invention silencing vibration-damping system.
In figure: 1: sound suppressor; 2: elastic shaft; 3: interior entrant sound noise elimination punched steel plate; 4: silencing plate; 5: outer entrant sound noise elimination punched steel plate; 6: elastic shaft is outer; 7: elastic shaft internal layer.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, the vibration insulating system that the embodiment of the present invention provides, this vibration insulating system comprises sound suppressor 1 and elastic shaft 2, described sound suppressor 1 is set on elastic shaft 2.
Be illustrated in figure 2 the structural sheet schematic diagram of silencing vibration-damping system, described sound suppressor 1 is three-decker, comprises interior entrant sound noise elimination punched steel plate 3, absorbent treatment 4 and outer entrant sound noise elimination punched steel plate 5; Described absorbent treatment 4 is filled between interior entrant sound noise elimination punched steel plate 3 and outer entrant sound noise elimination punched steel plate 5; In the Thickness Ratio of absorbent treatment 4, the thickness of entrant sound noise elimination punched steel plate 3 and outer entrant sound noise elimination punched steel plate 5 is all thick.Described absorbent treatment 4 is made by acoustic absorbant, and described acoustic absorbant can adopt one or more in polyfoam, softboard, flax board, compression glass silk floss, felt to make.Described elastic shaft 2 is double layer hollow circular shaft, and internal layer 7 adopts sheet steel to make, and outer 6 adopt carbon fiber to make.Described sheet steel refers to that thickness is not more than the steel plate of 3 millimeters, and conventional sheet steel thickness is 0.5mm-2mm.Described elastic shaft 2 two ends connect diaphragm coupling or coupling flange conventionally.
In sum, sound deadening shock absorption system provided by the invention can be eliminated the noise being produced by elastic shaft High Rotation Speed, and sound suppressor can absorb the noise that elastic shaft produces, reducing and having eliminated axle is the noise that High Rotation Speed produces, can eliminate the reflection of axle system to semianechoic room or noise elimination room noise simultaneously, play and reduce or eliminate the impact of kinematic train on the free found field characteristic of anechoic room.
The above is only a kind of preferred implementation of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (7)
1. a silencing vibration-damping system, is characterized in that: comprise sound suppressor (1) and elastic shaft (2), described sound suppressor (1) is set on elastic shaft (2).
2. silencing vibration-damping system according to claim 1, is characterized in that: described sound suppressor (1) is three-decker, comprises interior entrant sound noise elimination punched steel plate (3), absorbent treatment (4) and outer entrant sound noise elimination punched steel plate (5); Described absorbent treatment (4) is filled between interior entrant sound noise elimination punched steel plate (3) and outer entrant sound noise elimination punched steel plate (5).
3. silencing vibration-damping system according to claim 2, is characterized in that: in the Thickness Ratio of described absorbent treatment (4), the thickness of entrant sound noise elimination punched steel plate (3) and outer entrant sound noise elimination punched steel plate (5) is thick.
4. according to the silencing vibration-damping system described in claim 2 or 3, it is characterized in that: described absorbent treatment (4) is made by acoustic absorbant.
5. silencing vibration-damping system according to claim 4, is characterized in that: one or more in described acoustic absorbant employing polyfoam, softboard, flax board, compression glass silk floss, felt are made.
6. silencing vibration-damping system according to claim 1, is characterized in that: described elastic shaft (2) is double layer hollow circular shaft, and internal layer (7) adopts sheet steel to make, and outer (6) adopt carbon fiber to make.
7. silencing vibration-damping system according to claim 6, is characterized in that: described elastic shaft (2) two ends connect diaphragm coupling or coupling flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210363883.3A CN103674228A (en) | 2012-09-26 | 2012-09-26 | Sound damping and vibration reducing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210363883.3A CN103674228A (en) | 2012-09-26 | 2012-09-26 | Sound damping and vibration reducing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103674228A true CN103674228A (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210363883.3A Pending CN103674228A (en) | 2012-09-26 | 2012-09-26 | Sound damping and vibration reducing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103674228A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832625A (en) * | 2014-12-18 | 2015-08-12 | 北汽福田汽车股份有限公司 | Muffler device for transmission shaft of anechoic chamber |
| CN105223018A (en) * | 2015-09-29 | 2016-01-06 | 北汽福田汽车股份有限公司 | Pilot system |
| CN111207942A (en) * | 2020-02-27 | 2020-05-29 | 重庆大学 | NVH rack test system of air condition compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993649Y (en) * | 2006-12-30 | 2007-12-19 | 中国舰船研究设计中心 | Sound insulation performance measuring device |
| 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 |
| CN202157992U (en) * | 2011-07-27 | 2012-03-07 | 施建昌 | Cooling tower fan transmission shaft |
| CN202215573U (en) * | 2011-09-15 | 2012-05-09 | 程显军 | Novel carbon fiber composite material transmission roll shaft |
-
2012
- 2012-09-26 CN CN201210363883.3A patent/CN103674228A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993649Y (en) * | 2006-12-30 | 2007-12-19 | 中国舰船研究设计中心 | Sound insulation performance measuring device |
| 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 |
| CN202157992U (en) * | 2011-07-27 | 2012-03-07 | 施建昌 | Cooling tower fan transmission shaft |
| CN202215573U (en) * | 2011-09-15 | 2012-05-09 | 程显军 | Novel carbon fiber composite material transmission roll shaft |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832625A (en) * | 2014-12-18 | 2015-08-12 | 北汽福田汽车股份有限公司 | Muffler device for transmission shaft of anechoic chamber |
| CN104832625B (en) * | 2014-12-18 | 2018-09-14 | 北汽福田汽车股份有限公司 | Anechoic room transmission shaft silencing apparatus |
| CN105223018A (en) * | 2015-09-29 | 2016-01-06 | 北汽福田汽车股份有限公司 | Pilot system |
| CN111207942A (en) * | 2020-02-27 | 2020-05-29 | 重庆大学 | NVH rack test system of air condition compressor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |
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| RJ01 | Rejection of invention patent application after publication |