CN113682090B - Tire noise reduction system - Google Patents
Tire noise reduction systemInfo
- Publication number
- CN113682090B CN113682090B CN202110497711.4A CN202110497711A CN113682090B CN 113682090 B CN113682090 B CN 113682090B CN 202110497711 A CN202110497711 A CN 202110497711A CN 113682090 B CN113682090 B CN 113682090B
- Authority
- CN
- China
- Prior art keywords
- sound
- absorbing cotton
- tire
- cavity
- strip
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
本申请涉及轮胎制造技术领域，尤其涉及一种轮胎噪音降低系统。一种轮胎噪音降低系统，包括具有空腔的充气轮胎，充气轮胎具有胎面部、胎圈部、胎侧部，所述胎面部的内壁通过胶黏剂粘结设置有带状吸音棉，带状吸音棉沿圆周方向设置有一个以上连续的环形孔，带状吸音棉首尾相连接，环形孔也首尾相连形成一个不与轮胎内腔相通的环形大消音腔；所述的带状吸音棉为高分子材料发泡制得海绵状多孔材料，表观密度在5kg/m3‑50kg/m3，环形孔的侧壁与带状吸音棉的多孔相连通，使环形大消音腔和大量多孔消音腔相连通。通过本发明的实施发现，这种大主体消音腔配合无数小的消音腔设计，可以抑制较宽频率范围下的空腔噪音。
The present application relates to the field of tire manufacturing technology, and in particular to a tire noise reduction system. A tire noise reduction system includes an inflatable tire with a cavity, the inflatable tire having a tread portion, a bead portion, and a sidewall portion. The inner wall of the tread portion is provided with a strip of sound-absorbing cotton bonded with an adhesive. The strip of sound-absorbing cotton is provided with one or more continuous annular holes along the circumferential direction. The strip of sound-absorbing cotton is connected end to end, and the annular holes are also connected end to end to form a large annular sound-absorbing cavity that is not connected to the inner cavity of the tire. The strip of sound-absorbing cotton is a sponge-like porous material made by foaming a polymer material, with an apparent density of 5kg/ m3-50kg / m3 . The sidewalls of the annular holes are connected to the porous portions of the strip of sound-absorbing cotton, so that the large annular sound-absorbing cavity is connected to a large number of porous sound-absorbing cavities. Through the implementation of the present invention, it was found that this large main body sound-absorbing cavity combined with countless small sound-absorbing cavities can suppress cavity noise over a wide frequency range.
Description
Technical Field
The application relates to the technical field of tire manufacturing, in particular to a tire noise reduction system.
Background
The noise generated when the tire is driven is generally composed of external noise such as pattern noise, road noise, and internal cavity noise. Wherein the tire cavity noise is excited by the road surface input and is caused by the resonance of an ultra-low pressure acoustic system consisting of a tire and a disc wheel, and is also commonly called tire resonance.
The cavity noise frequency is between 200-300Hz, determined by the tire cavity structure.
In the cavity inside the tire, a muffler made of a spongy material is adhered, which is a well-known method for reducing the noise of the cavity. The spongy sound-absorbing cotton is used as the action mechanism of the silencer, and is provided with a plurality of micropores formed by air inside the sound-absorbing cotton, so that sound waves can be buffered and absorbed, and the sound waves are difficult to reflect out on the plane of the sound-absorbing cotton. Therefore, in the prior art, the density of the sound absorbing cotton is strictly regulated, and if the density of the sound absorbing cotton is regulated to be 40g/m3-50kg/m3 in the patent CN110395976A, the effective effect cannot be obtained. However, the method has a great room for improvement in the degree of attenuation of cavity noise. Because the cavity noise is generated at a frequency of 200-300Hz, and the pore diameter of polyurethane which is used as a sound absorbing cotton material after foaming is generally fixed, the sound waves are difficult to eliminate in the whole frequency range.
The Chinese patent application (publication No. CN110733298A, publication No. 20200131) discloses a tire noise reducing device, which is mainly characterized in that a noise reducing structure is arranged on the inner surface of a tire cavity in the tire, at least one sound absorbing material is arranged on the noise reducing structure, the sound absorbing material penetrates through to form a hollow air chamber, the sound absorbing material comprises a bonding surface adhered to the inner surface of the tire, and a through surface, a channel is arranged on the through surface and used for communicating the air chamber and facing the center of the tire, and due to the design of arranging the air chamber on the sound absorbing material, the energy generated by sound waves is counteracted and attenuated, so that the resonance sound of the tire cavity is effectively reduced. However, in the through passage communicating with the air chamber in the patent of the invention, reflection and superposition of sound waves are formed, and the sound deadening effect is weakened. Therefore, the structure still has room for further optimization in noise attenuation.
Disclosure of Invention
In order to solve the technical problems, the application aims to provide a tire noise reduction system, which is characterized in that more than one larger cylindrical hole which is not communicated with the inner cavity of a tire is designed in the sound-absorbing cotton and is used as a main silencing cavity, and secondly, the specific gravity of the sound-absorbing cotton material is increased, namely the volume of countless small sound-absorbing cavities is reduced. Through the implementation of the application, the large main body silencing cavity is matched with countless small silencing cavity designs, so that cavity noise in a wider frequency range can be restrained.
In order to achieve the above purpose, the present application adopts the following technical scheme:
A tire noise reduction system comprises a pneumatic tire with a cavity, wherein the pneumatic tire is provided with a tread part, a tire bead part and a tire side part, the inner wall of the tread part is adhered by an adhesive to form a strip-shaped sound absorbing cotton, and the tire noise reduction system is characterized in that more than one continuous annular hole is formed in the strip-shaped sound absorbing cotton along the circumferential direction, the strip-shaped sound absorbing cotton is connected end to end, the annular holes are also connected end to form an annular large silencing cavity which is not communicated with an inner cavity of the tire, the strip-shaped sound absorbing cotton is made of a high polymer material through foaming to obtain a spongy porous material, the apparent density is at 5kg/m 3-50kg/m3, and the side wall of the annular hole is communicated with the multiple holes of the strip-shaped sound absorbing cotton to enable the annular large silencing cavity to be communicated with a large number of porous silencing cavities.
Preferably, the connection line between the center of gravity of the annular hole and the center of the tread of the tire is perpendicular to the auxiliary line of the center where the section width of the tire is located. The dynamic balance adjustment of the tire can be favorably assisted by the setting position of the gravity center.
Preferably, the cross section of the annular hole accounts for 10-40% of the positive cross section area of the strip-shaped sound-absorbing cotton, and the apparent density of the strip-shaped sound-absorbing cotton is 5kg/m 3-20kg/m3.
Preferably, the circular hole has a circular, square, regular triangle, regular pentagon, regular hexagon or pentagram shape in regular cross section. Of course, the annular aperture of the present application may also comprise a variety of cross-sections, including shaped, non-equilateral polygons, and the like.
Preferably, the radius of the circumcircle of the positive section of the annular hole is Rs, the thickness Hs of the sound absorbing cotton is more than or equal to 2mm and less than or equal to 0.5Hs-1mm. If Rs is less than 2mm, the whole main silencing cavity has a small volume, and the inhibition effect on cavity noise is weakened, and if Rs is more than 0.5Hs-1mm, the whole sound-absorbing cotton material has a small volume, and the inhibition effect on cavity noise is weakened as well due to the insufficient number of small cavities.
Preferably, the height of the tire cavity is Hc, the thickness Hs of the sound absorbing cotton is more than or equal to 5mm and less than or equal to 0.8Hc. If Hs is less than 20mm, the number of small silencing cavities in the sound absorbing cotton is insufficient, and the effect of reducing cavity noise cannot be achieved, and if Hs is more than 0.8Hc, the weight of the whole sound absorbing cotton is large, so that the weight of a tire can be increased, and the possibility of falling off from the inner wall of the tire during running can be increased.
Preferably, the front section of the strip-shaped sound absorbing cotton is square or isosceles trapezoid.
Preferably, the polymer material is one of low-density polyether, polyurethane and polyester. Most preferred is polyurethane metamaterial.
Preferably, the adhesive is a self-repairing adhesive coating with the functions of puncture resistance, repair prevention and adhesion of sound absorbing cotton, the width of the self-repairing adhesive coating is set to be 50% -130% of the tread width, and the thickness is 0.5-3.5 mm. The self-repairing sizing material coating adopted by the application has good adhesion performance, can firmly adsorb the banded sound-absorbing cotton on the inner surface of the tire, contains self-repairing components, and can quickly permeate into the leakage part to block and repair the leakage hole when the tire is punctured.
Preferably, the width of the self-repairing adhesive coating is set to be 100% -200% of the width of the contact surface between the self-repairing adhesive coating and the sound-absorbing cotton, and the impregnation depth of the self-repairing adhesive coating impregnated in the sound-absorbing cotton is set to be 1% -3 mm.
By adopting the technical scheme, the sound absorbing cotton system is provided with more than one larger cylindrical hole which is not communicated with the inner cavity of the tire and is used as the main silencing cavity, and secondly, the specific gravity of the sound absorbing cotton material is increased, namely the volumes of countless small sound absorbing cavities are reduced. Through the implementation of the application, the large main body silencing cavity is matched with countless small silencing cavity designs, so that cavity noise in a wider frequency range can be restrained.
Drawings
Fig. 1 is a schematic structural view of the present application.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the drawings.
The tire noise reduction system shown in fig. 1 comprises a pneumatic tire with a cavity, the pneumatic tire is provided with a tread part 1, a bead part 3 and a sidewall part 2, the inner wall of the tread part 1 is adhered and provided with a strip-shaped sound absorbing cotton 4 through an adhesive 5, the strip-shaped sound absorbing cotton 4 is made of a spongy porous material by foaming polyurethane, the apparent density of the strip-shaped sound absorbing cotton 4 is 5kg/m 3-20kg/m3, the positive section of the strip-shaped sound absorbing cotton 4 is square, the cavity height of the tire is Hc, the thickness Hs of the sound absorbing cotton is more than or equal to 5mm and less than or equal to 0.8Hc. The strip-shaped sound-absorbing cotton 4 is provided with a continuous annular hole 6 along the circumferential direction, the positive section of the annular hole 6 is circular, the section of the annular hole accounts for 10-40% of the positive section area of the strip-shaped sound-absorbing cotton, the radius of the circle is Rs, and the thickness Hs of the sound-absorbing cotton is more than or equal to 2mm and less than or equal to 0.5Hs-1mm. The connection line between the center of gravity of the annular hole 6 and the center of the tread of the tire is perpendicular to the auxiliary line of the center where the section width of the tire is located. The strip-shaped sound absorbing cotton 4 is connected end to end, the annular holes 6 are also connected end to form an annular main silencing cavity which is not communicated with the inner cavity of the tire, and the side walls of the annular holes 6 are communicated with the multiple holes of the strip-shaped sound absorbing cotton 4, so that the annular main silencing cavity is communicated with a large number of the multiple holes silencing cavities.
The adhesive 5 is a self-repairing sizing material coating with the functions of puncture resistance, repair prevention and adhesion of sound absorbing cotton, the width of the self-repairing sizing material coating is set to be 50% -130% of the tread width, and the thickness is 0.5-3.5 mm. The width of the self-repairing sizing material coating is set to be 100% -200% of the width of the contact surface of the self-repairing sizing material coating and the sound-absorbing cotton, and the soaking depth of the self-repairing sizing material coating soaked in the sound-absorbing cotton is set to be 1% -3 mm. The self-repairing sizing material coating adopted by the application has good adhesion performance, can firmly adsorb the banded sound-absorbing cotton on the inner surface of the tire, contains self-repairing components, and can quickly permeate into the leakage part to block and repair the leakage hole when the tire is punctured.
With a 205/55R16 gauge tire as an embodiment, all the formulations, materials and structural designs of the tire are the same, only the material density of the sound absorbing cotton, the radius Rs of the cylindrical sound attenuation chamber, and the thickness Hs of the sound absorbing cotton are changed. The cavity height of this specification is 60mm. Wherein, examples 1-3 and comparative examples 1-4 have sound-absorbing cotton structures, comparative example 5 does not have sound-absorbing cotton, comparative example 4 does not have an annular main silencing cavity, and the annular main silencing cavity of comparative example 3 is communicated with the tire cavity.
And the performance test shows that the sound-absorbing cotton does not fall off after the GB 4502 test.
And the noise test comprises a BBM data acquisition system, a three-way acceleration sensor and a microphone (microphone). For the detected tires of different schemes, on smooth road surfaces and rough road surfaces, automobiles pass through at 80km/h, and the noise level DB is measured at the frequency of 200-300 Hz.
The specific results are as follows:
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The tire noise reduction system comprises a pneumatic tire with a cavity, wherein the pneumatic tire is provided with a tread part (1), a bead part (3) and a sidewall part (2), the inner wall of the tread part (1) is adhered with a strip-shaped sound absorbing cotton (4) through an adhesive (5), and the tire noise reduction system is characterized in that the strip-shaped sound absorbing cotton (4) is provided with more than one continuous annular hole (6) along the circumferential direction, the annular holes (6) are connected end to form an annular main silencing cavity which is not communicated with the inner cavity of the tire, the strip-shaped sound absorbing cotton (4) is made of a high polymer material by foaming to obtain a spongy porous material, the apparent density is at 5kg/m 3-50kg/m3, the strip-shaped sound absorbing cotton (4) is provided with a large number of porous silencing cavities, and the side wall of the annular hole (6) is communicated with the porous of the strip-shaped sound absorbing cotton (4) to enable the annular main silencing cavity to be communicated with the large number of porous silencing cavities;
The connecting line of the center of gravity of the annular hole (6) and the center of the tread of the tire is vertical to the auxiliary line of the center where the section width of the tire is positioned, and the annular hole (6) accounts for 10-40% of the positive section area of the belt-shaped sound absorbing cotton (4);
The positive cross section of the strip-shaped sound-absorbing cotton (4) is square or isosceles trapezoid, the positive cross section of the annular hole (6) is round, the radius of a circumcircle of the positive cross section of the annular hole (6) is Rs, the thickness Hs of the sound-absorbing cotton is more than or equal to 2mm and less than or equal to 0.5Hs-1mm, the height of the tire cavity is Hc, and the thickness Hs of the sound-absorbing cotton is more than or equal to 5mm and less than or equal to 0.8Hc.
2. A tire noise reduction system according to claim 1, wherein the belt-like sound absorbing cotton has an apparent density of 5kg/m 3-20kg/m3.
3. The tire noise reduction system of claim 1, wherein the polymeric material is one of a low density polyether, polyurethane and polyester.
4. A tyre noise reduction system according to any one of claims 1-3, wherein the adhesive (5) is a self-repairing glue coating having both anti-puncture repair-free and sound-absorbing cotton adhesion functions, the width of the self-repairing glue coating being set to 50% -130% of the tread width and the thickness being 0.5-3.5 mm.
5. The system according to claim 4, wherein the width of the coating of the self-repairing adhesive is set to 100% -200% of the width of the contact surface with the sound-absorbing cotton, and the impregnation depth of the coating of the self-repairing adhesive impregnated in the sound-absorbing cotton is set to 1% -3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110497711.4A CN113682090B (en) | 2021-05-08 | 2021-05-08 | Tire noise reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110497711.4A CN113682090B (en) | 2021-05-08 | 2021-05-08 | Tire noise reduction system |
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| CN113682090A CN113682090A (en) | 2021-11-23 |
| CN113682090B true CN113682090B (en) | 2025-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110497711.4A Active CN113682090B (en) | 2021-05-08 | 2021-05-08 | Tire noise reduction system |
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| CN (1) | CN113682090B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114456744A (en) * | 2022-01-19 | 2022-05-10 | 中策橡胶集团股份有限公司 | Tire self-repairing sealant adhered with mute cotton, tire and tire manufacturing method |
| CN115042565A (en) * | 2022-08-01 | 2022-09-13 | 青岛森麒麟轮胎股份有限公司 | Mute tire, quality control method of mute tire and control system |
| CN115635804A (en) * | 2022-11-01 | 2023-01-24 | 重庆金康赛力斯新能源汽车设计院有限公司 | Tire silencing device convenient to install and dismantle |
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|---|---|---|---|---|
| DE102016222345A1 (en) * | 2016-11-15 | 2018-05-17 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| CN110857014A (en) * | 2018-08-22 | 2020-03-03 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN111016549A (en) * | 2019-12-31 | 2020-04-17 | 江苏通用科技股份有限公司 | A kind of anti-puncture self-repair and repair-free silent tire and processing method |
| CN215552363U (en) * | 2021-05-08 | 2022-01-18 | 中策橡胶集团有限公司 | Tire noise reduction system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239809A (en) * | 1999-12-21 | 2001-09-04 | Bridgestone Corp | Pneumatic low-noise tire |
| WO2005012008A1 (en) * | 2003-08-04 | 2005-02-10 | The Yokohama Rubber Co.,Ltd. | Low noise pneumatic tire |
| KR101365969B1 (en) * | 2011-12-14 | 2014-02-28 | 한국타이어 주식회사 | Low noise tire |
| JP6277111B2 (en) * | 2014-11-17 | 2018-02-07 | 東洋ゴム工業株式会社 | Pneumatic tire |
| CN112659819A (en) * | 2021-01-07 | 2021-04-16 | 万力轮胎股份有限公司 | Structure for reducing noise of tire cavity |
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2021
- 2021-05-08 CN CN202110497711.4A patent/CN113682090B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016222345A1 (en) * | 2016-11-15 | 2018-05-17 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| CN110857014A (en) * | 2018-08-22 | 2020-03-03 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN111016549A (en) * | 2019-12-31 | 2020-04-17 | 江苏通用科技股份有限公司 | A kind of anti-puncture self-repair and repair-free silent tire and processing method |
| CN215552363U (en) * | 2021-05-08 | 2022-01-18 | 中策橡胶集团有限公司 | Tire noise reduction system |
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| CN113682090A (en) | 2021-11-23 |
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Address after: 310008 No. 1, No. 1 Street, Qiantang District, Hangzhou, Zhejiang Applicant after: Zhongce Rubber Group Co.,Ltd. Address before: 310008 No. 1, Baiyang street, Qiantang District, Hangzhou City, Zhejiang Province Applicant before: ZHONGCE RUBBER GROUP Co.,Ltd. |
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