CN208953233U - A kind of wind tunnel test platform that supporting wheel diameter is variable - Google Patents
A kind of wind tunnel test platform that supporting wheel diameter is variable Download PDFInfo
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- CN208953233U CN208953233U CN201821983085.XU CN201821983085U CN208953233U CN 208953233 U CN208953233 U CN 208953233U CN 201821983085 U CN201821983085 U CN 201821983085U CN 208953233 U CN208953233 U CN 208953233U
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- supporting wheel
- disk
- wind tunnel
- diameter
- tunnel test
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Abstract
The utility model discloses the wind tunnel test platforms that a kind of supporting wheel diameter can be changed, the support frame of supporting wheel is lifted including supporting wheel and from bottom, supporting wheel includes that the centrally located drive disk annular different with a plurality of outer diameters expands disk, annular expands disk internal diameter and matches with driving disk diameter, various outer diameter annular expands disk and can be socketed and be fixed on outside drive disk, form the supporting wheel of different-diameter, the diameter control of supporting wheel can effectively reduce boundary layer, control the cost of layout of equipment and the energy consumption of operation, wheelbase and wheel tread adjusting mechanism are installed on the supporting wheel of variable-diameter, so that testing stand is suitable for the research of different type auto model, improve the versatility of equipment.
Description
Technical field
The utility model relates to a kind of vehicle test devices, and in particular to a kind of to meet sizes auto model test need
The variable wind tunnel test platform of the supporting wheel diameter asked.
Background technique
Wind tunnel test is the conventional means that current vehicle manufacturing industry is used to study and improve aerodynamics of vehicle characteristic,
The flow field change for understanding vehicle periphery complexity can be more intuitively observed with let us by this test.In vehicle wind tunnel test,
Key equipment of the testing stand with supporting wheel as model support not only wants that support auto model can be stablized, simultaneously also
It wants energy band to move auto model and completes high-precision rotary, to obtain the test data of different yaw angle operating conditions.
Existing wind tunnel test platform will generally spend nearly million to buy a large amount of relevant devices and assembled, such as turntable
System (including supporting wheel), boundary layer suction arrangement etc., wherein supporting wheel front end often opens up row's suction hole, suction
It is connected inside hole with boundary layer suction arrangement, makes to form negative pressure in suction hole by suction unit, using negative pressure by supporting wheel
The boundary layer (air-flow for acting on test platform can generate velocity gradient and then form boundary layer) of front end is taken away, and boundary layer is eliminated
It influences.Although suction unit can solve Boundary Layer Problem, buys suction unit and processing is customized to supporting wheel and build
If higher cost, on the other hand, existing supporting wheel size is fixed, can not be changed, and when carrying out large scale vehicle test, needs
Attachment device is re-worked, may cause suction effect variation, when test, which is also likely to be present, forgets that suction unit is arranged in turn
Lead to problems such as test determination data inaccurate.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of structure is simple, boundary layer suction arrangement cloth is reduced
Setting but can equally eliminate the wind tunnel test platform that the supporting wheel diameter in boundary layer can be changed, and further, the supporting wheel diameter is variable
Wind tunnel test platform may also adapt to various sizes of auto model, auto model Study on Flow Field process is because being not installed with suction dress
It sets, the energy consumption of equipment operation can be reduced, control equipment cost of layout.
In order to solve the above technical problems, the technical solution of the utility model is:
A kind of variable wind tunnel test platform of supporting wheel diameter, including supporting wheel and the supporting wheel is lifted from bottom
Support frame, the supporting wheel include a centrally located drive disk it is different with a plurality of outer diameters annular expand disk, it is described
Annular expands disk internal diameter and matches with the driving disk diameter, and the annular expands disk and can be socketed and be fixed on the driving
Outside disk, the annular expands face of trying to get to the heart of a matter and is equipped with circuit orbit with one heart, and support frame as described above includes can be radially flat along the supporting wheel
The complex root support column of shifting, the support column top are slidably connected on the circuit orbit.
Preferably, being equipped on the supporting wheel upper surface for different type auto model to be fixed on the support
Wheelbase and wheel tread adjusting mechanism on turntable.
Preferably, the wheelbase and wheel tread adjusting mechanism include the Wheel mounting bracket being slidably connected on the supporting wheel
The fixed frame guide rail of limit is provided with for Wheel mounting bracket sliding, the fixed frame guide rail includes in the supporting wheel center of circle
Heart guide rail and the side rails for being symmetrically distributed in the center rail two sides, the Wheel mounting bracket are installed by a plane four-bar linkage
On the fixed frame guide rail.
Preferably, support frame as described above further includes the telescopic arm group for being horizontally arranged at ground, the telescopic arm group is stretched by more
The radial combination of contracting arm is formed, and the outer end correspondence of the telescopic arm is fixedly connected on the support column lower end.
Preferably, being fixedly installed with the driving motor for driving the drive disk rotation, the drive below the supporting wheel
The output end of dynamic motor upward and is fixedly connected with a driving gear vertically, and the drive disk lower surface is fixedly connected with a driving cog
Wheel, the transmission gear and the driving gear are intermeshed.
Preferably, the upper end of support column is fixedly connected with sliding block, the sliding block is embedded in the circuit orbit.
Preferably, the length of the annular expansion dish external diameter is 2.6 times of auto model length of wagon to be studied.
Preferably, the driving disk diameter is 1.6m, mating there are three annular expansion disks to be used cooperatively with drive disk, described
Annular expands dish external diameter length and is respectively as follows: 2.8m, 3.0m and 7.5m.
Preferably, it is 0.5m that the supporting wheel is lifted away from ground level by support frame as described above.
Preferably, the cross section of the support column is drops, to reduce support column to the interference of air-flow and influence.
After adopting the above scheme, the utility model has the advantage that
1. testing stand is supported auto model to be studied using the supporting wheel diameter of specific dimensions, pumping is not arranged
Inhaling device but equally can reduce the influence of supporting surface boundary layer airflow, reduces the energy consumption of equipment operation, controls equipment
Cost of layout；
2. testing stand is needed for different automobile types using different-diameter supporting wheel, inappropriate supporting wheel be will affect
Test is carried out, therefore can avoid because forgetting to lead to the inaccurate generation of determination data due to suction unit is arranged；
3. be supported to auto model to be studied using variable-diameter supporting wheel, and combined axis is away from adjusting machine with wheelspan
Structure, so that improving the versatility of equipment the utility model relates to the research that device is suitable for different type auto model.
Detailed description of the invention
Fig. 1 is the utility model perspective view；
Fig. 2 is the utility model supporting wheel sectional view；
Fig. 3 is Fig. 1 part-structure detail view；
Fig. 4 is the utility model top view；
Fig. 5 is the utility model bottom view
Another angle perspective view of Fig. 6 the utility model.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
Revealed the utility model is a kind of wind tunnel test platform that supporting wheel diameter is variable, as shown in figures 1 to 6, for this
The preferred embodiment of utility model, as shown in Figure 1, testing stand includes supporting wheel 1 and lifts the support of supporting wheel 1 from bottom
Frame 2, auto model are placed on supporting wheel 1, by control auto model Windward angle and wind-force size, are obtained and are studied difference
Auto model surrounding fluid data under ambient condition.For the test demand for meeting different size automobile models, supporting wheel 1 is designed
Disk 12 is expanded including a centrally located drive disk 11 annular different with a plurality of outer diameters, annular is expanded 12 internal diameter of disk and driven
11 diameter of Moving plate matches, select any annular expand disk 12 can be socketed and be fixed on outside drive disk 11 formed it is different size of
Supporting wheel 1, and then meet the test demand of different type auto model.Specifically, as shown in Fig. 2, 11 side of drive disk can
To select step-like or inclined-plane, it is the step-like or inclined-plane to match with 11 side of drive disk that annular, which expands 12 internal diameter side of disk,
Docking composition supporting wheel 1 is carried out using inclined-plane both in the present embodiment.Since boundary layer suction arrangement investment is higher, and in order to
Solve the problems, such as that 1 boundary layer airflow of supporting wheel influences, inventor proposes can be by raising 1 height of supporting wheel and controlling support
The ratio of 1 diameter of turntable and auto model length of wagon to be studied realizes effect identical with suction unit.Inventor's research
Auto model windward when around the discovery of kinetic energy distribution cloud atlas, it is because of branch why boundary layer, which can interfere test result,
It is smaller compared to actual ground to support turntable, when supporting wheel diameter is smaller, the wake flow of support frame will seriously affect auto model
Tail wind, the interaction of auto model trailing vortex and support frame trailing vortex and interferes and can all change automobile tail flow field, into
And aerodynamic force is caused to change.Inventor further analyzes, and when changing supporting wheel diameter, will affect auto model front end
Airflow direction, vehicle bottom velocity flow profile and trailing vortex form, by comparison, it was found that, there are a reasonable supporting wheel diameter, supports
Frame is minimum to the interference in flow field around auto model, and flow field is consistent with actual conditions around auto model, and aerodynamic coefficient connects
Nearly actual value, and this reasonable supporting wheel diameter is 2.6 times of auto model length of wagon, at this time aerodynamic coefficient calculated value
And wind tunnel test value deviation is minimum, can be controlled within 5%.For current common type vehicle, for example, the general vehicle of pony car
The general vehicle commander of a length of 4.2-4.5m, SUV is 4.6-4.8m, and the general vehicle commander of motorbus is 11-13m, is converted by model scale 1:4
Afterwards, the general vehicle commander of pony car 1.05-1.125m, SUV is 1.15-1.2m, and the general vehicle commander of motorbus is 2.75-3.25m.
The outer diameter length that annular expands disk 12 can choose 2.725m-2.925m then to meet the Research Requirements of pony car, select
2.975m-3.125m selects 7.15m-8.45m to meet the Research Requirements of SUV to meet the Research Requirements of motorbus.It is based on
The demand research, the present embodiment determine drive disk 11 diameter be 1.6m, and it is mating there are three annular expand disk 12 and driving
Disk 11 is used cooperatively, and it is respectively 2.8m, 3.0m and 7.5m that annular, which expands dish external diameter length, meets pony car, SUV, big respectively
The Research Requirements of type Passenger Vehicle.Above-mentioned listed annular expand 12 outer diameter of disk be only the present embodiment according to common type vehicle and
Setting, and the annular of various outer diameter can be selected to expand disk during actual implementation according to actual needs.
Further, it also requires for supporting wheel 1 to be lifted away from ground when installation, it is too low that supporting wheel 1 is lifted away from ground, even if increasing
The annular outer diameter for expanding disk 12, the effect realized is possible to or is unable to reach requirement, and if supporting wheel 1 is lifted away from ground
Excessively high, then support frame 2 occupies space in a large amount of wind-tunnel, and inventor is lifted away from ground when supporting wheel by comparative study, discovery
When distance is greater than 0.5m, influence very little caused by boundary layer can be neglected, even and if supporting wheel be further lifted away from ground
Face, result is almost the same, therefore supporting wheel 1 is selected to be lifted away from ground level as 0.5m in the present embodiment.
In order to which different size automobile models are fixed on supporting wheel 1, vehicle mould when supporting wheel 1 being avoided to rotate
Type is slippery on supporting wheel 1, and shown as shown in Figure 1, Figure 3 and Figure 4, supporting wheel is also equipped with wheelbase and wheelspan tune on 1 upper surface
Section mechanism 3 is fixed with the auto model to different wheelbases or different wheelspans.As shown in Figure 1, wheelbase and wheel tread adjusting mechanism 3
The fixation of limit is provided including two groups of Wheel mounting brackets 31 being slidably connected on supporting wheel 1 and for the sliding of Wheel mounting bracket 31
Frame guide rail 32, as shown in figure 4, fixed frame guide rail 32 include across 1 center of circle of supporting wheel center rail 321 and be symmetrically distributed in
The side rails 322 of 321 two sides of center rail, center rail 321 and side rails 322 have part to be distributed in table on drive disk 11
Face is partially distributed in annular and expands 12 upper surface of disk, and drive disk 11 and annular expand when disk 12 is socketed the alignment it is noted that guide rail,
And be fixed between drive disk 11 and annular expand disk 12 using fixinig plate 13, avoid the two from relatively rotating, fixinig plate
13 are separately fixed on drive disk 11 and annular expansion disk 12 by bolt.As shown in figure 4, every group of Wheel mounting bracket 31 is logical
A plane four-bar linkage is crossed to be mounted on fixed frame guide rail 32.Plane four-bar linkage includes that two adjacent support arms 33 and two are adjacent
Installing arm 34, a vertex 35 of plane four-bar linkage is fixed on supporting wheel 1, and two adjacent support arms 33 are articulated with simultaneously
The vertex 35, support arm 33 different from vertex 35 the other end be equipped with protrusion 331, two adjacent installing arms 34 respectively with two branch
33 component movement pair of brace, installing arm 34, which is equipped with, adjusts sliding slot with raised 331 matched adjusting sliding slots 341,331 insertion of protrusion
It is slided in 341 and along sliding slot 341 is adjusted.One end of two installing arms 34 is hinged in a central slider 36 simultaneously, installing arm 34
The other end be then inserted into hinged wheel fixed jaw 38 after sleeve 37 respectively, casing 37 is then respectively hinged at a side slide 39
On, central slider 36 is slidably mounted in center rail 321 and can slide along center rail 321, and side slide 39 then slides respectively
It is mounted in side rails 322 and can be slided along side rails 322.Plane four-bar linkage is by the effect along 321 direction force of center rail
When, central slider 36 and side slide 39 slide the translation that plane four-bar linkage can be achieved simultaneously, and then meet different length vehicle mould
The fixed demand of type wheel；When opposite slide occurs for central slider 36 and side slide 39, plane four-bar linkage can occur to compress or draw
It stretches, at this point, the adjusting sliding slot 341 of installing arm 34 is that support arm 33 provides sliding space, installing arm 34 can be slided in casing 37
It is flexible, and then the spacing between two wheel fixed jaws 38 of same group of Wheel mounting bracket 31 is adjustable, can meet different in width vehicle
The fixed demand of model wheel.Specifically, installing arm 34 is stretched in casing 37 to two Slideslips when the compression of plane four-bar linkage
Out, two 38 spacing of wheel fixed jaw increase, and when plane four-bar linkage stretches, installing arm 34 is slided to center in casing 37 and received
Contracting, two 38 spacing of wheel fixed jaw reduce.Wheel fixed jaw 38 is rotatably coupled on side slide 39, can easily be adjusted
The direction of claw opening is to adapt to wheel.As shown in figure 3, plane four-bar linkage compression and tension operation can by screw rod 30 come
It realizes, fixed block 351 is equipped on vertex 35, and fixed block 351 is equipped with horizontal through hole, and 30 one end of screw rod can by bearing 301
Rotation is mounted in horizontal through hole, and drive block 361 is then equipped in central slider 36, and drive block 361 is again provided with horizontal logical
Hole is equipped in the horizontal through hole of drive block 361 and the matched internal screw thread of 30 screw thread of screw rod, when rotary screw rod, screw rod 30 and driving
The interaction of 361 screw threads of block drives central slider 36 close to or far from fixed block 351, and then realizes the pressure of plane four-bar linkage
Contracting and stretched operation.
Stablizing for supporting wheel 1 is supported to realize, it is desirable that the radius variable of part support frame 2, and then adapt to difference
The supporting wheel 1 of radius.As shown in Figure 5 and Figure 6,11 bottom surface of drive disk is equipped with central circular track 14 with one heart, and annular expands disk
12 bottom surfaces are equipped with circuit orbit 15 with one heart, and support frame 2 includes center bearing bracket 21, can be along the complex root branch of supporting wheel radial translation
Dagger 22 and the telescopic arm group 23 for being horizontally arranged at ground, center bearing bracket 21 and central circular track 14 cooperate to drive disk 11 into
Row support, and support column 22 is then expanded disk to annular with the cooperation of circuit orbit 15 and is supported.Telescopic arm group 23 is flexible by more
The radial combination of arm is formed, and the outer end of telescopic arm is corresponding to be fixedly connected on 22 lower end of support column, support column 22 and telescopic arm 23
Being fixedly connected can be using welding or integrated molding.Bifurcated is formed at the top of center bearing bracket 21 and is slidably connected at central circular track
On 14,22 top of support column is slidably connected on circuit orbit 15, specifically, center bearing bracket 21 and 22 upper end of support column are solid
Surely it is connected with sliding block 24, sliding block 24 is respectively embedded into central circular track 14 and circuit orbit 15, or can be with to reduce friction
Idler wheel is set between center bearing bracket 21, support column 22 and supporting wheel 1.When supporting wheel 1 rotates, center bearing bracket 21, support
22 top of column can not only provide supporting wheel 1 upward support force, while sliding block 24 is in central circular track 14, circular rail
Sliding does not influence the rotation of supporting wheel 1 in road 15.Further, to reduce support frame 2 to the drag effect of wind, support column is designed
22 cross section is drops, and the circular arc cylinder of more support columns 22 is unified towards at the downstream of wind, and arrow shows wind in Fig. 5
The direction entered.
As shown in Figure 2 and Figure 6, the driving motor 4 that driving drive disk 11 rotates is fixedly installed with below supporting wheel 1, by
Driving motor 4 drives supporting wheel 1 to rotate.Specifically, the output end of driving motor 4 upward and is fixedly connected with a sliding tooth vertically
Wheel 41,11 lower surface of drive disk are fixedly and coaxially connected the transmission gear 42 of an annular, can choose and be welded on transmission gear 42
11 lower surface of drive disk, transmission gear 42 and driving gear 41 are intermeshed, and directly driving gear 41 rotates driving motor 4, into
And rotated with nutating gear 42, transmission gear 42 rotates and then drives drive disk 11 and entire supporting wheel 1 to rotate.This
Two driving gears 41 are symmetrically arranged in 42 side of transmission gear in selection in embodiment, drive gear 41 by two synchronously controls
Driving motor 4 driven, two driving gears 41 be arranged can be improved to supporting wheel 1 drive stability.Driving motor 4
Dextrorotation, derotation and turn over angle can on accurate control supporting wheel 1 auto model different Windward angles, to obtain various researchs
Data.
The above descriptions are merely preferred embodiments of the present invention, not makees to the technical scope of the utility model
Any restrictions, therefore any changes or modifications made in the claims and specifications of the utility model all should belong to practical
Within the scope of new patent is covered.
Claims (10)
1. a kind of variable wind tunnel test platform of supporting wheel diameter, lifts the supporting wheel including supporting wheel and from bottom
Support frame, it is characterised in that: the supporting wheel includes that the centrally located drive disk annular different with a plurality of outer diameters is opened up
Disk is opened up, the annular expands disk internal diameter and matches with the driving disk diameter, and the annular expands disk and can be socketed and fix
Outside the drive disk, the annular expands face of trying to get to the heart of a matter and is equipped with circuit orbit with one heart, and support frame as described above includes can be along the support
The complex root support column of turntable radial translation, the support column top are slidably connected on the circuit orbit.
2. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the support
Wheelbase and wheelspan for being fixed on different type auto model on the supporting wheel are installed to adjust on disk upper surface
Mechanism.
3. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 2, it is characterised in that: the axis
Away from wheel tread adjusting mechanism include the Wheel mounting bracket being slidably connected on the supporting wheel and for Wheel mounting bracket sliding mention
For the fixed frame guide rail of limit, the fixed frame guide rail include across the supporting wheel center of circle center rail and be symmetrically distributed in institute
The side rails of center rail two sides are stated, the Wheel mounting bracket is mounted on the fixed frame guide rail by a plane four-bar linkage.
4. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the support
Frame further includes the telescopic arm group for being horizontally arranged at ground, and the telescopic arm group is formed by the radial combination of more telescopic arms, described
The outer end correspondence of telescopic arm is fixedly connected on the support column lower end.
5. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the support
It is fixedly installed with the driving motor for driving the drive disk rotation below turntable, the output end of the driving motor is vertically upward simultaneously
It is fixedly connected with a driving gear, the drive disk lower surface is fixedly connected with a transmission gear, the transmission gear and the driving
Gear intermeshing.
6. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the support
Column upper end is fixedly connected with sliding block, and the sliding block is embedded in the circuit orbit.
7. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the annular
The length for expanding dish external diameter is 2.6 times of auto model length of wagon to be studied.
8. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the driving
Disk diameter is 1.6m, and mating there are three annular expansion disks to be used cooperatively with drive disk, and the annular expands dish external diameter length difference
Are as follows: 2.8m, 3.0m and 7.5m.
9. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the support
It is 0.5m that the supporting wheel is lifted away from ground level by frame.
10. a kind of variable wind tunnel test platform of supporting wheel diameter according to claim 1, it is characterised in that: the branch
The cross section of dagger is drops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821983085.XU CN208953233U (en) | 2018-11-29 | 2018-11-29 | A kind of wind tunnel test platform that supporting wheel diameter is variable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821983085.XU CN208953233U (en) | 2018-11-29 | 2018-11-29 | A kind of wind tunnel test platform that supporting wheel diameter is variable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208953233U true CN208953233U (en) | 2019-06-07 |
Family
ID=66745354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821983085.XU Expired - Fee Related CN208953233U (en) | 2018-11-29 | 2018-11-29 | A kind of wind tunnel test platform that supporting wheel diameter is variable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208953233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556822A (en) * | 2018-11-29 | 2019-04-02 | 厦门理工学院 | Reduce the method and vehicle wind tunnel test platform that supporting surface boundary layer airflow influences |
| CN111530523A (en) * | 2020-06-25 | 2020-08-14 | 窦晓梅 | Laboratory bench base for college physics experiments |
-
2018
- 2018-11-29 CN CN201821983085.XU patent/CN208953233U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556822A (en) * | 2018-11-29 | 2019-04-02 | 厦门理工学院 | Reduce the method and vehicle wind tunnel test platform that supporting surface boundary layer airflow influences |
| CN109556822B (en) * | 2018-11-29 | 2023-11-28 | 厦门理工学院 | Method for reducing influence of boundary layer air flow of supporting surface and vehicle wind tunnel test platform |
| CN111530523A (en) * | 2020-06-25 | 2020-08-14 | 窦晓梅 | Laboratory bench base for college physics experiments |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190607 Termination date: 20211129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |