CN2926528Y - Composite shielding board with vibration-absorbing and noise-lowering functions for engine of automobile - Google Patents
Composite shielding board with vibration-absorbing and noise-lowering functions for engine of automobile Download PDFInfo
- Publication number
- CN2926528Y CN2926528Y CN 200620026589 CN200620026589U CN2926528Y CN 2926528 Y CN2926528 Y CN 2926528Y CN 200620026589 CN200620026589 CN 200620026589 CN 200620026589 U CN200620026589 U CN 200620026589U CN 2926528 Y CN2926528 Y CN 2926528Y
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- shield plates
- heat insulation
- noise
- baffle
- damping
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Abstract
A compound damping and noise reduction baffle used for vehicle engines relates to the damping and noise reduction technology of vibration source and the baffle comprises a surface sheathing, a one-or-two-layer heat insulation interlayer and a baffle base; wherein the surface sheathing, one-or-two-layer heat insulation interlayer and the baffle base are integrated into a whole, and the surface sheathing is sealed into the baffle base, some fastening bolt holes are arranged on the surface sheathing and the baffle base which are stamped into a concavo convex structure and the heat insulation interlayer is provided with some polycrystalline fibers. The damping and noise reduction method put forward by this utility model is based on the two-layer heat insulation and the polycrystalline fibers in the heat insulation interlayer and the polycrystalline fibers could be used for heat insulation and damping material. The test shows that after adopting the compound damping and noise reduction baffle the noise could be reduced by 1 d B, and the effect of noise reduction and heat insulation is rather good; in addition, the surface temperature of the baffle will further decrease in a driving vehicle.
Description
Technical field
The utility model belongs to the internal-combustion engine manufacturing, is specifically related to the noise reduction technology to vehicular engine.
Background technique
Along with improving constantly of diesel engine power, the heat that gives out by outlet pipe is also in continuous rising, and outlet pipe can be at 600-700 ℃ in its surface temperature of normal operation, sometimes even higher.After adopting turbocharging technology, exhaust also can make its temperature up to 500-600 ℃ by turbosupercharger.Therefore to outside outlet pipe, coat thermal-protective coating, the simple sheet iron that adopts of man of general engine shop coats, initial stage surface temperature under this kind coating form is everlasting between 130-180 ℃, but after using not oversize a period of time, surface temperature can reach 300-400 ℃ or higher.The local appearance of thermal-protective coating is damaged, and effect of heat insulation obviously reduces, and ambient temperature rises, and the red-hot bright people of outlet pipe is easy to cause and scalds and fire.In addition, on internal-combustion engine, be used for heat insulation barrier thin-wall part simple structure, be energized easily and produce resonance, the noise that radiation is very strong.For analyzing and head it off, shield plates to be installed on motor it has been carried out noise testing, test result can find that obviously the position noise of shield plates is higher.It is overheated that ignition wire above the while motor also occurs, the phenomenon that rubber is easily aging.The result of test will consider in design for design and the adjustment of installing shield plates additional provides foundation: increasing its quality of stiffening plate can not be too big; Structurally can not influence the installation of other parts etc.Because the existence of above-mentioned constraint conditio will be so will have bigger difficulty to the concrete enforcement of vehicular engine noise reduction technology.But proposition of the present utility model can effectively reduce the vibration and the noise of motor.
Summary of the invention
The purpose of this utility model is, proposes a kind of vehicular engine combined vibration-damping noise-reducing shield plates, not only can satisfy heat insulation requirement but also can reduce the radiated noise of shield plates itself.
Below in conjunction with accompanying drawing the technical solution of the utility model is illustrated.Vehicular engine combined vibration-damping noise-reducing shield plates is made up of surperficial cladding plate 1, insulating sandwich 2 and shield plates matrix 3.According to different situations with require also and can form by surperficial cladding plate 1, two (layer) insulating sandwich 2 and shield plates matrix 3.Surface cladding plate 1, insulating sandwich 2 and 3 impact briquettings of shield plates matrix are an integral body, and the outward edge of shield plates matrix 3 wraps surperficial cladding plate 1, and surperficial cladding plate 1 is packaged in the shield plates matrix 3.Surface cladding plate 1 and shield plates matrix 3 strike out concaveconvex structure, are to design for gaining in strength and preventing resonance.Break away from for preventing two-ply, cladding plate 1 and shield plates matrix 3 are provided with fastening screw keyhole 4, in parts installation processes such as shield plates and outlet pipe, adopt bolton to connect.Also can not add clamping bolt if vibration damping position area is less.Insulating sandwich 2 has heat insulating function, and polycrystalline fibre is good damping material, and therefore filling polycrystalline fibre material can play the damping-constraining function between cladding plate 1 and 3 two kinds of sheet metals of shield plates matrix in insulating sandwich 2, reduces the vibration of biside plate.Surface cladding plate 1 mainly act as the restriction thermal-protective coating and takes place to break away from or layering, plays effect attractive in appearance simultaneously.The material of shield plates matrix 3 is good iron plate of heat-conducting property or steel plate.
The utility model and traditional shield plates have in essence different.The traditional screen baffle is that single layer board is heat insulation, and its capacity of heat transmission and heat-insulating capability are all poor.And the absorption vibration denoise method that the utility model proposes is based on double thermal insulation, adds heat insulation fiber between two-layer shield plates, and heat insulation fiber itself has double action, both can be used for heat insulationly, can be used as damping material again.
Description of drawings
Fig. 1 is the utility model structural principle sectional drawing.
Fig. 2 is not for the combined vibration-damping noise-reducing shield plates structural principle sectional drawing of clamping bolt.
Fig. 3 is the combined vibration-damping noise-reducing shield plates structural principle sectional drawing with double thermal insulation interlayer.
Embodiment
By the following examples the utility model is further described.Vehicular engine combined vibration-damping noise-reducing shield plates is selected individual layer insulating sandwich or double thermal insulation sandwich structure for use according to actual conditions.Present embodiment adopts individual layer insulating sandwich structure (as Fig. 1) to be installed on tested test engine outlet pipe top.Surface cladding plate 1 adopts the individual layer steel plate, and plate thickness is 0.8mm.Shield plates matrix 3 adopts the individual layer steel plate, and plate thickness is 1.2mm.Surface cladding plate 1 and shield plates matrix 3 pass through mould-forming.Polycrystalline fibre material in the insulating sandwich 2 is an asbestos cloth.In the shield plates forming process, reserve the backrush limit, treat to carry out roll bending technology after polycrystalline fibre and surperficial cladding plate 1 are installed, polycrystalline fibre is coated between the laminate fully.
The noise of single, double layer combined vibration-damping noise-reducing shield plates being installed and do not install under three kinds of situations of shield plates is tested respectively.Take 9 methods to measure the motor average sound pressure level at semianechoic room, the data after the test are relatively listed in the table.Noise testing result under three kinds of situations
| The test operating mode | Each measuring point sound pressure level dB (A) | Sound pressure level dB (A) | ||||||||
| 1 | ?2 | ?3 | ?4 | ?5 | ?6 | ?7 | ?8 | ?9 | ||
| The individual layer baffle plate | 93.30 | ?89.15 | ?91.67 | ?87.54 | ?92.75 | ?88.70 | ?92.34 | ?87.42 | ?90.30 | 90.85 |
| No baffle plate | 90.39 | ?87.38 | ?90.68 | ?87.26 | ?90.34 | ?87.9 | ?92.24 | ?85.82 | ?90.33 | 89.58 |
| Double-deck baffle plate | 90.55 | ?87.29 | ?90.94 | ?86.81 | ?89.82 | ?86.52 | ?89.69 | ?3 ?86.84 | ?88.63 | 88.87 |
From table, can find, reach 90.85dB (A) for the motor that the individual layer baffle plate is installed at the calibration point noise, and after baffle plate that will be wherein removed, sound pressure level had descended on the contrary, illustrate that baffle plate has caused the rising of total noise of centrifuge just, so must improve to this shield plates.In the 3rd time is measured is that the utility model is applied in the reality, measure and to find by actual noise, after adopting the combined vibration-damping noise-reducing shield plates, noise level and individual layer shield plates with do not install the shield plates state compare descended a lot, improve shield plates and can make noise decline 1dB (A), illustrate that vibration and noise reducing shield plates of the present utility model has played tangible effect.
Test for heat-shielding performance of the present utility model: when adopting the individual layer shield plates,, can find when rotating speed and duty ratio are higher that kermesinus appears in shield plates, illustrate that the shield plates self-temperature may reach 300-400 ℃ owing to do not have cooling air at semianechoic room.When adopting the combined vibration-damping noise-reducing shield plates, under same state, the restricting plate loses any variable color of generation, illustrates that effect of heat insulation is fine, if on traveling automobile, surface temperature can further reduce.
Claims (3)
1. vehicular engine combined vibration-damping noise-reducing shield plates, it is characterized in that shield plates is made up of surperficial cladding plate (1), insulating sandwich (2) and shield plates matrix (3), or form by surperficial cladding plate (1), two insulating sandwich (2) and shield plates matrix (3), surface cladding plate (1), insulating sandwich (2) and shield plates matrix (3) impact briquetting are an integral body, and surperficial cladding plate (1) is packaged in the shield plates matrix (3).
2. according to the described vehicular engine combined vibration-damping noise-reducing of claim 1 shield plates, it is characterized in that described surperficial cladding plate (1) and shield plates matrix (3) strike out concaveconvex structure, are provided with fastening screw keyhole (4) on described cladding plate (1) and shield plates matrix (3).
3. according to the described vehicular engine combined vibration-damping noise-reducing of claim 1 shield plates, it is characterized in that filling polycrystalline fibre material in the described insulating sandwich (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620026589 CN2926528Y (en) | 2006-07-03 | 2006-07-03 | Composite shielding board with vibration-absorbing and noise-lowering functions for engine of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620026589 CN2926528Y (en) | 2006-07-03 | 2006-07-03 | Composite shielding board with vibration-absorbing and noise-lowering functions for engine of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2926528Y true CN2926528Y (en) | 2007-07-25 |
Family
ID=38280772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620026589 Expired - Fee Related CN2926528Y (en) | 2006-07-03 | 2006-07-03 | Composite shielding board with vibration-absorbing and noise-lowering functions for engine of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2926528Y (en) |
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2006
- 2006-07-03 CN CN 200620026589 patent/CN2926528Y/en not_active Expired - Fee Related
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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: 20070725 |