CN102529820A - Flow perturbation component for reducing eddy noise of automobile rear view mirror - Google Patents
Flow perturbation component for reducing eddy noise of automobile rear view mirror Download PDFInfo
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- CN102529820A CN102529820A CN2012100011469A CN201210001146A CN102529820A CN 102529820 A CN102529820 A CN 102529820A CN 2012100011469 A CN2012100011469 A CN 2012100011469A CN 201210001146 A CN201210001146 A CN 201210001146A CN 102529820 A CN102529820 A CN 102529820A
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Abstract
The invention discloses a flow perturbation component for reducing eddy noise of an automobile rear view mirror, which comprises a mirror frame and a plurality of flow perturbation strips integrated with the mirror frame and is characterized in that the front parts and the tail parts of the flow perturbation strips are smooth curved surfaces; an included angle Theta between the windward side at the front part of each flow perturbation strip and the vertical direction is 30 degrees and 60 degrees; at least 5 flow perturbation strips are distributed at the upper part of the mirror frame at equal intervals; and at least 2 flow perturbation strips are distributed at the side of the mirror frame, which is close to a vehicle body, at equal intervals. The flow perturbation component has a simple structure and low cost and can be used for minimizing the aerodynamic noise generated when a vehicle operates at a high speed; the flow perturbation component has a wide practical range, and after the rear view mirror with poor aerodynamic performance adopts the flow perturbation component, the aerodynamic noise can be improved; the flow perturbation component can be used for the shaping phase of the rear view mirror and can also be applied to the noise rectification process in the last period of development; and the flow perturbation component is simple to install and a station of making the rear view mirror cannot be increased.
Description
Technical field
The present invention relates to automobile component, be specifically related to a kind of flow-disturbing member that reduces the automobile rearview mirror eddy noise.
Background technology
The noise level of automobile is one of its important performance characteristic, is the principal element that influences traveling comfort in the car, and the car of purchasing of affect people's is selected.Air and auto body and annex (like back mirror and antenna etc.) mutual friction and produce noise mutually when the aerodynamic noise of automobile is meant running car.Aerodynamics noise is owing to the outer unsettled flow field of car produces, and therefore must on the basis of knowing each regional flow field characteristic of vehicle, study aerodynamics noise characteristic and mechanism of production.Reach 100km/h or when higher, aerodynamics noise will become main noise source, appreciable impact occupant traveling comfort to the speed of a motor vehicle.Aerodynamics noise is along with 6 powers of speed increase (be 1 times of the every increase of speed, aerodynamics noise will increase 18dB), so the aerodynamics noise during high speed is more and more outstanding.For driving over a long distance, aerodynamics noise can increase the driving fatigue sense, to safety traffic and unfavorable.Therefore how reducing aerodynamics noise has obtained concern more and more widely.
At present, the international automobile industry competitively strengthens the investment that is used for the noise aspect, attracts client to improve product quality.Through researchist effort for many years, obtained comparatively significant achievement at aspects such as reducing motor noise, transmission system noise and squeal of tire, so the aerodynamics noise during high speed just becomes the more and more main component part of internal car noise.Domesticly starting late aspect the research of aerodynamics noise, the concern to aerodynamics noise has also been ignored by enterprise in product development, and therefore all there is the big problem of aerodynamics noise in a large amount of car loads, has influenced the quality of product.The automaker reduces the leakage noise through the method that improves the sealing property of automobile commonly used at present; Though can reduce levels of aerodynamic noise in the car to a certain extent; But obviously the work of this respect is limited to the later stage that new model is designed and developed usually, even after the sample car manufacturing, just can carry out, and this not only can cause the noise reduction cost to improve; And very little because of the modification that can make in the later stage of designing and developing, so the noise reduction that often can't realize ideal.Therefore the commitment of designing and developing process at new model becomes a kind of inexorable trend with regard to the research of carrying out aspect the aerodynamics noise.The generation of aerodynamics noise mainly is because air-flow that the time-dependent pressure pulsation of car body surface causes and the automobile of running at high speed produces and car surface protruded object (like back mirror, antenna, Windshield Wiper and baggage rack etc.) effect produce eddy noise, need research and solve respectively.
Summary of the invention
The objective of the invention is the flow-disturbing member in order to provide to reduce the automobile rearview mirror eddy noise, it can improve the air-flow of the rear-view mirror body of flowing through, and changes the air current flow direction, and broken bigger eddy current reduces the aerodynamics noise at back mirror place.
Analyze discovery through CFD (computational fluid mechanics), all there is bigger burble zone in various vehicles at the back mirror place, and the relatively poor back mirror stall spot of part moulding directly extends to the vehicle window position.Bigger stall spot is accompanied by the disengaging of eddy current, and will produce bigger aerodynamics noise this moment.Therefore, on back mirror, increase bumper/spoiler, change the air flow direction here, less stall spot, broken bigger separation eddy, thereby improve the flow field at back mirror place through bumper/spoiler.When stall spot reduces, when flow field, back mirror place improves, can reach the purpose that reduces aerodynamics noise.
A kind of flow-disturbing member that reduces the automobile rearview mirror eddy noise of the present invention; Comprise that picture frame and a plurality of and picture frame are the one trouble flow strip; It is characterized in that: the front portion of said trouble flow strip and afterbody are smooth surface, and any corner angle or wedge angle can not be arranged, otherwise can produce bigger aerodynamics noise; The angle theta of anterior windward side and vertical direction is between 30 °-60 °, to guarantee to fall the wind effect of making an uproar.
Further, the top of said picture frame equidistantly distributes 5 trouble flow strip at least, has equidistantly distributed 2 trouble flow strip at least near a side of vehicle body.For bigger back mirror, the quantity of trouble flow strip can suitably increase.
The present invention compares with prior art and has the following advantages:
(1) of the present invention simple in structure, excellent noise reduction effect, cost is low, the aerodynamics noise in the time of reducing automobile high-speed to greatest extent;
(2) analyze through CFD (computational fluid mechanics), can clearly fall the make an uproar optimum structure of back mirror trouble flow strip of wind, can on different automobile types, carry out the most tiny optimization to reach the higher wind effect of making an uproar of falling;
(3) usage range of the present invention is wide, adopt the present invention for the relatively poor back mirror of aerodynamic performance after, all can improve aerodynamics noise;
(4) the present invention can be used for the back mirror moulding stage, also can be applicable to the noise rectification process of development late stage;
(5) the present invention installs simply and can not increase the station of back mirror making.
Description of drawings
Fig. 1 is the structural representation of trouble flow strip;
Fig. 2 adopts back mirror scheme drawing of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment one: referring to Fig. 1 and Fig. 2, described a kind of flow-disturbing member that reduces the automobile rearview mirror eddy noise comprises that picture frame 3 and a plurality of and picture frame are one trouble flow strip 1; Equidistantly distribute 5 trouble flow strip 1 on the top of picture frame 3, equidistantly distributed 2 trouble flow strip 1 near a side of vehicle body.The front portion of said trouble flow strip 1 and afterbody are smooth surface, and the angle theta of anterior windward side and vertical direction is at 45 °, to guarantee to fall the wind effect of making an uproar.
Embodiment two: described a kind of flow-disturbing member that reduces the automobile rearview mirror eddy noise comprises that picture frame 3 and a plurality of and picture frame are one trouble flow strip 1; Equidistantly distribute 6 trouble flow strip 1 on the top of picture frame 3, equidistantly distributed 3 trouble flow strip 1 near a side of vehicle body.The front portion of said trouble flow strip 1 and afterbody are smooth surface, and the angle theta of anterior windward side and vertical direction is at 30 °, to guarantee to fall the wind effect of making an uproar.
Trouble flow strip 1 of the present invention is main noise reduction parts, and the front portion must remain smooth surface, and the angle of anterior windward side and vertical direction should remain between 30 ° ~ 60 °; Afterbody also will carry out suitable rounding off; In a word, be that front portion or afterbody will guarantee that all any corner angle or wedge angle can not be arranged.Distribution for bigger back mirror trouble flow strip can suitably increase.
Trouble flow strip 1 is as a whole with picture frame 3, and the overlap joint through picture frame 3 fixes.Because the partitioned mode of back mirror is indefinite, the overlapping mode of picture frame 3 is just different.Mainly be divided into following several kinds:
(1) picture frame 3 is one with mirror body 2;
(2) picture frame 3 the latter halfs and mirror body 2 one, the first half and 2 clampings of mirror body;
(3) picture frame 3 is independent parts, outward flange and 2 clampings of mirror body, and inward flange is connected with screw on the inner skeleton of back mirror in mirror body 2 inside;
No matter overlap joint adopts the sort of form, all is to link to each other with car body through back mirror bearing 5, by minute surface 4 back mirror is sealed.
Claims (2)
1. flow-disturbing member that reduces the automobile rearview mirror eddy noise; Comprise that picture frame (3) and a plurality of and picture frame are one trouble flow strip (1); It is characterized in that: the front portion of said trouble flow strip (1) and afterbody are smooth surface, and the angle theta of anterior windward side and vertical direction is between 30 °-60 °.
2. a kind of flow-disturbing member that reduces the automobile rearview mirror eddy noise according to claim 1 is characterized in that: the top of said picture frame (3) equidistantly distributes 5 trouble flow strip (1) at least, has equidistantly distributed 2 trouble flow strip (1) at least near a side of vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100011469A CN102529820A (en) | 2012-01-05 | 2012-01-05 | Flow perturbation component for reducing eddy noise of automobile rear view mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100011469A CN102529820A (en) | 2012-01-05 | 2012-01-05 | Flow perturbation component for reducing eddy noise of automobile rear view mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102529820A true CN102529820A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100011469A Pending CN102529820A (en) | 2012-01-05 | 2012-01-05 | Flow perturbation component for reducing eddy noise of automobile rear view mirror |
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| CN (1) | CN102529820A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105398390A (en) * | 2015-11-23 | 2016-03-16 | 天津华夏联盛汽车部件有限公司 | Novel outer rear view mirror for vehicle |
| CN106882121A (en) * | 2017-03-28 | 2017-06-23 | 吉林大学 | A kind of pneumatic vibration damping connection device of car exterior mirror |
| CN109911019A (en) * | 2019-04-01 | 2019-06-21 | 吉林大学 | A kind of pneumatic noise reduction automobile A column device and its control method based on active vortex control |
| CN110414030A (en) * | 2018-04-27 | 2019-11-05 | 丰田自动车株式会社 | Wind noise resolver and wind noise analytic method |
| CN110816412A (en) * | 2018-08-07 | 2020-02-21 | 大众汽车有限公司 | Exterior mirror device for a motor vehicle, motor vehicle |
| WO2020115564A1 (en) | 2018-12-04 | 2020-06-11 | Mervo Zoltan | Rear-view mirror device for vehicles |
| CN114523903A (en) * | 2021-12-01 | 2022-05-24 | 浙江零跑科技股份有限公司 | Low noise rear-view mirror |
Citations (4)
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| US20030026008A1 (en) * | 2001-08-02 | 2003-02-06 | Murakami Corporation | Door mirror for automobile |
| CN1621284A (en) * | 2003-11-26 | 2005-06-01 | 三菱自动车工业株式会社 | Vehicle door rearview mirror device |
| JP3132090U (en) * | 2007-03-14 | 2007-05-31 | 英夫 福山 | Wheel arch air splitter |
| CN101815643A (en) * | 2007-10-03 | 2010-08-25 | 丰田自动车株式会社 | Vehicle and vehicle substructure |
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2012
- 2012-01-05 CN CN2012100011469A patent/CN102529820A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030026008A1 (en) * | 2001-08-02 | 2003-02-06 | Murakami Corporation | Door mirror for automobile |
| CN1621284A (en) * | 2003-11-26 | 2005-06-01 | 三菱自动车工业株式会社 | Vehicle door rearview mirror device |
| JP3132090U (en) * | 2007-03-14 | 2007-05-31 | 英夫 福山 | Wheel arch air splitter |
| CN101815643A (en) * | 2007-10-03 | 2010-08-25 | 丰田自动车株式会社 | Vehicle and vehicle substructure |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105398390A (en) * | 2015-11-23 | 2016-03-16 | 天津华夏联盛汽车部件有限公司 | Novel outer rear view mirror for vehicle |
| CN106882121A (en) * | 2017-03-28 | 2017-06-23 | 吉林大学 | A kind of pneumatic vibration damping connection device of car exterior mirror |
| CN106882121B (en) * | 2017-03-28 | 2023-09-08 | 吉林大学 | Pneumatic vibration reduction connecting device for car exterior rearview mirror |
| CN110414030A (en) * | 2018-04-27 | 2019-11-05 | 丰田自动车株式会社 | Wind noise resolver and wind noise analytic method |
| CN110816412A (en) * | 2018-08-07 | 2020-02-21 | 大众汽车有限公司 | Exterior mirror device for a motor vehicle, motor vehicle |
| CN110816412B (en) * | 2018-08-07 | 2023-04-07 | 大众汽车有限公司 | Exterior mirror device for a motor vehicle, motor vehicle |
| WO2020115564A1 (en) | 2018-12-04 | 2020-06-11 | Mervo Zoltan | Rear-view mirror device for vehicles |
| CN109911019A (en) * | 2019-04-01 | 2019-06-21 | 吉林大学 | A kind of pneumatic noise reduction automobile A column device and its control method based on active vortex control |
| CN109911019B (en) * | 2019-04-01 | 2024-02-06 | 吉林大学 | Active vortex control-based pneumatic noise reduction automobile A column device and control method thereof |
| CN114523903A (en) * | 2021-12-01 | 2022-05-24 | 浙江零跑科技股份有限公司 | Low noise rear-view mirror |
| CN114523903B (en) * | 2021-12-01 | 2024-04-19 | 浙江零跑科技股份有限公司 | Low-noise rearview mirror |
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Application publication date: 20120704 |