CN109556822A - Reduce the method and vehicle wind tunnel test platform that supporting surface boundary layer airflow influences - Google Patents
Reduce the method and vehicle wind tunnel test platform that supporting surface boundary layer airflow influences Download PDFInfo
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- CN109556822A CN109556822A CN201811440402.8A CN201811440402A CN109556822A CN 109556822 A CN109556822 A CN 109556822A CN 201811440402 A CN201811440402 A CN 201811440402A CN 109556822 A CN109556822 A CN 109556822A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Abstract
The invention discloses a kind of method that reduction supporting surface boundary layer airflow influences and vehicle wind tunnel test platforms, by selecting diameter that supporting wheel is lifted away to for 2.6 times of auto model length of wagon of round turntable to be studied as supporting wheel and using support frame the height of ground 0.5m, boundary layer can be effectively reduced, control the cost of layout of equipment and the energy consumption of operation, in addition wheelbase and wheelspan adjustment structure are installed on the supporting wheel of variable-diameter, so that the present invention relates to the researchs that method and test platform are suitable for different type auto model, improve the versatility of equipment.
Description
Technical field
The present invention relates to vehicle wind tunnel test apparatus fields, and in particular to one kind can reduce the influence of supporting surface boundary layer airflow
Method and based on this method application meet sizes auto model test demand vehicle wind tunnel test platform.
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.Wind tunnel test is usually to set
Standby middle placement auto model obtains test data, and in vehicle wind tunnel test, the test platform with supporting wheel is as mould
The key equipment of type support not only wants that support auto model can be stablized, while also wanting energy band to move auto model and completing high-precision
Rotation, 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, and such as turn
Disc system (including supporting wheel), boundary layer suction arrangement etc., wherein supporting wheel front end often opens up row's suction hole, takes out
It is connected inside sucker with boundary layer suction arrangement, makes to form negative pressure in suction hole by suction unit, is turned support using negative pressure
The boundary layer (air-flow for acting on test platform can generate velocity gradient and then form boundary layer) of disk front end is taken away, and boundary is eliminated
Layer influences.Although suction unit can solve Boundary Layer Problem, buys suction unit and processing is customized to supporting wheel
Construction cost is higher, and on the other hand, existing supporting wheel size is fixed, can not be changed, when carrying out large scale vehicle test,
Need to re-work attachment device, may cause suction effect variation, when test be also likely to be present forget to be arranged suction unit into
And lead to problems such as test determination data inaccurate.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of not using suction unit but also can reduce supporting surface side
The method of interlayer airflow influence, and it is simple based on this method to provide a kind of structure, and it is same to reduce boundary layer suction arrangement arrangement
The vehicle wind tunnel test platform in boundary layer can be eliminated, further, which may also adapt to various sizes of
Auto model, auto model Study on Flow Field process can reduce the energy consumption of equipment operation, control because being not installed with suction unit
Equipment cost of layout.
In order to solve the above technical problems, the technical solution of the invention is as follows:
A method of reducing supporting surface boundary layer airflow influences, and selects diameter for 2.6 times of auto model length of wagon to be studied
Round turntable as supporting wheel, the support frame of the supporting wheel is lifted from bottom in supporting wheel arranged beneath, it is described
It is 0.5m that the supporting wheel is lifted away from ground level by support frame, and the outer diameter of supporting wheel requires and be lifted away from ground level requirement can
Reducing supporting surface boundary layer airflow influences, and the supporting wheel bottom surface is equipped with circuit orbit with one heart, can be equipped with multiple circuit orbits,
Support frame as described above includes can be along the complex root support column of the supporting wheel radial translation, and therefore, support column can be distributed in variable
In the circular trace of diameter, support column distribution is corresponding from above-mentioned different circuit orbits, and the support column top slide connects
It connects on the circuit orbit.
Preferably, the supporting wheel includes that the centrally located drive disk annular different with a plurality of outer diameters is expanded
Disk, the annular expand disk internal diameter and match with the driving disk diameter, and it is difference wait grind that the annular, which expands the outer diameter of disk,
2.6 times for studying carefully auto model length of wagon select the suitable annular of outer diameter to expand disk socket according to auto model height to be studied
And it is fixed on outside the drive disk and forms the supporting wheel.
Preferably, selecting cross section that will be supported as support column according to circuit orbit radius for the erect mast of drops
Column is evenly distributed in circuit orbit projection, and adjustment support column keeps its circular arc cylinder unified towards at the downstream of wind, and then reduces
Support column is on the interference of air-flow and influence；It is fixedly connected with sliding block in the upper end of support column, and the sliding block is embedded in the circle
In shape track.
Using a kind of vehicle wind tunnel test platform of the above method comprising supporting wheel and lift the support from bottom
The support frame of turntable, the supporting wheel include that the centrally located drive disk annular different with a plurality of outer diameters expands disk,
The 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 institute
It states outside drive disk, the diameter of the supporting wheel is 2.6 times of auto model vehicle body length to be studied, and the annular expands face of trying to get to the heart of a matter
It is equipped with circuit orbit with one heart, support frame as described above includes can be along the complex root support column of the supporting wheel radial translation, the branch
The height of dagger is 0.5m, is slidably connected on the circuit orbit at the top of the support column.
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
It is slided on fixed frame guide rail on fixed frame guide rail and under the limitation of the position of plane four-bar linkage.
Preferably, the cross section of the support column is drops, gas-flow resistance is reduced.
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, and support turns
When disk rotates, sliding block plays support and position-limiting action.
After adopting the above scheme, present invention has the advantage that
1. the present invention controls supporting wheel diameter, suction unit is not arranged but and equally can reduce supporting surface boundary layer gas
Stream influences, and reduces the energy consumption of equipment operation, controls equipment cost of layout.
2. the present invention is needed for different automobile types using different-diameter supporting wheel, inappropriate supporting wheel will affect examination
Development is tested, 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 tied away from adjusting with wheelspan
Structure, so that improving the versatility of equipment the present invention relates to the research that device is suitable for different type auto model.
Detailed description of the invention
Fig. 1 is perspective view of the present invention；
Fig. 2 is supporting wheel sectional view of the present invention；
Fig. 3 is Fig. 1 part-structure detail view；
Fig. 4 is top view of the present invention；
Fig. 5 is bottom view of the present invention
Another angle perspective view of Fig. 6 present invention.
Specific embodiment
The invention will be further described in the following with reference to the drawings and specific embodiments.
Embodiment one:
Disclosed is a kind of vehicle wind tunnel test platforms, are presently preferred embodiments of the present invention, such as shown in figures 1 to 6
Shown in Fig. 1, test platform includes supporting wheel 1 and lifts the support frame 2 of supporting wheel 1 from bottom, and auto model is placed in support
On turntable 1, by control auto model Windward angle and wind-force size, obtains and study auto model week under varying environment state
Enclose fluid data.For the test demand for meeting different size automobile models, designing supporting wheel 1 includes a centrally located driving
The annular different with a plurality of outer diameters of disk 11 expands disk 12, and annular expands 12 internal diameter of disk and matches with 11 diameter of drive disk, selects
It selects any annular and expands disk 12 and can be socketed and be fixed on outside drive disk 11 and form 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 choose 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, using oblique both in the present embodiment
Face carries out docking composition supporting wheel 1.Since boundary layer suction arrangement investment is higher, and in order to solve 1 boundary layer of supporting wheel
Airflow influence problem, inventor proposes can be by raising 1 height of supporting wheel and controlling 1 diameter of supporting wheel and vehicle to be studied
The ratio of model length of wagon realizes effect identical with suction unit.Around when inventor has studied auto model windward
Kinetic energy distribution cloud atlas discovery, boundary layer why test result can be interfered be because supporting wheel compared to actual ground compared with
Small, when supporting wheel diameter is smaller, the wake flow of support frame will seriously affect auto model tail wind, auto model trailing vortex
It interaction with support frame trailing vortex and interferes and can all change automobile tail flow field, and then 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
With trailing vortex form, by comparison, it was found that, there are a reasonable supporting wheel diameters, and support frame is to flow field around auto model
Interference is minimum, and flow field is consistent with actual conditions around auto model, and aerodynamic coefficient is close to actual value, and this reasonable support
Disk diameter is that 2.6 times of auto model length of wagon, at this time aerodynamic coefficient calculated value and wind tunnel test value deviation are minimum, can
Control is within 5%.For current common type vehicle, for example, the general vehicle commander of pony car is 4.2-4.5m, the general vehicle commander of SUV
For 4.6-4.8m, the general vehicle commander of motorbus is 11-13m, after model scale 1:4 conversion, pony car 1.05-
The general vehicle commander of 1.125m, SUV is 1.15-1.2m, and the general vehicle commander of motorbus is 2.75-3.25m.Annular expands the outer diameter of disk 12
Length can choose 2.725m-2.925m then to meet the Research Requirements of pony car, select 2.975m-3.125m to meet
The Research Requirements of SUV select 7.15m-8.45m to meet the Research Requirements of motorbus.Based on the demand research, this implementation
Example determine drive disk 11 diameter be 1.6m, and it is mating there are three annular expand disk 12 be used cooperatively with drive disk 11, annular is opened up
Opening up dish external diameter length is respectively 2.8m, 3.0m and 7.5m, meets the research need of pony car, SUV, motorbus vehicle respectively
It asks.It is only that the present embodiment is set according to common type auto model, and reality is real that above-mentioned listed annular, which expands 12 outer diameter of disk,
The annular of various outer diameter can be selected to expand disk during applying 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.
Embodiment two:
The method influenced using a kind of reduction supporting surface boundary layer airflow of above-mentioned test platform comprising following steps.
Step 1: for the auto model of different lengths of wagon, select the supporting wheel of different-diameter to auto model into
Row support, specifically, measuring to auto model length of wagon to be studied, selects diameter for auto model vehicle body length to be studied
The round turntable of 2.6 times of degree is as supporting wheel.To realize the alterable vehicle to meet different lengths of wagon of supporting wheel diameter
Model, design supporting wheel include that the centrally located drive disk annular different with a plurality of outer diameters expands disk, the ring
Shape expands disk internal diameter and matches with the driving disk diameter, and the outer diameter that the annular expands disk is different auto models to be studied
2.6 times of length of wagon select the suitable annular expansion disk of outer diameter to be socketed and be fixed on outside the drive disk and form supporting wheel.
Step 2: lifting the support frame of supporting wheel in supporting wheel arranged beneath from bottom, and supporting wheel bottom surface is concentric
Equipped with circuit orbit, supporting wheel is lifted away from ground by support frameHeight be 0.5m, support frame includes can be along supporting wheel radial direction
The support column for translating adjustment, selects cross section that will be propped up as support column according to circuit orbit radius for the erect mast of drops
Dagger is evenly distributed in circuit orbit projection, and adjustment support column keeps its circular arc cylinder unified towards at the downstream of wind；Support column
Top slide is connected on circuit orbit, specifically, end is fixedly connected with sliding block on the support columns, and sliding block is embedded in circuit orbit
It is interior.
Step 3: the driving motor of driving drive disk rotation, driving electricity are fixedly mounted on supporting wheel supported underneath frame
The output end of machine upward and is fixedly connected with a driving gear vertically, and drive disk lower surface is fixedly connected with a transmission gear, driving cog
Wheel and driving gear intermeshing, driving motor drive supporting wheel rotation by driving gear and transmission gear, to guarantee to drive
Motor is moved to the stabilized driving of supporting wheel, can choose and two driving gears are symmetrically set in transmission gear side, is driven
Gear is driven by the driving motor 4 of two synchronously controls.
Step 4: being placed in supporting wheel center for auto model to be studied, and in supporting wheel upper surface, installation will not be for will
Same types of vehicles model is fixed on wheelbase and wheel tread adjusting mechanism on supporting wheel, or can also be before installation annular expands disk
Wheelbase and wheel tread adjusting mechanism are first installed, and two groups of wheelbases and wheel tread adjusting mechanism are retracted in drive disk disk, wait pacify
It installs annular and expands disk, then wheelbase and wheel tread adjusting mechanism are stretched to annular and expanded on disk；According to length of wagon and width tune
Bearing away from and wheel tread adjusting mechanism by holding auto model wheel tightly be fixed on auto model on supporting wheel, avoid slipping
It is sliding.
Step 5: it dries to support frame, supporting wheel and auto model to be studied, is slowly precisely changed by driving motor
The Windward angle of auto model to be studied, surrounding fluid number when monitoring and obtaining auto model difference yaw angle operating condition to be studied
According to.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore the changes or modifications that claim under this invention and specification are done in every case, it all should belong to the range that the invention patent covers
Within.
Claims (10)
1. a kind of method for reducing supporting surface boundary layer airflow and influencing, it is characterised in that: select diameter for auto model to be studied
The round turntable that 2.6 times of length of wagon lifts the supporting wheel from bottom as supporting wheel, in supporting wheel arranged beneath
Support frame, the supporting wheel is lifted away from ground by support frame as described aboveHeight is 0.5m, the supporting wheel bottom surface is set with one heart
There is circuit orbit, support frame as described above includes can be along the complex root support column of the supporting wheel radial translation, the support capital
Portion is slidably connected on the circuit orbit.
2. the method according to claim 1 for reducing supporting surface boundary layer airflow and influencing, it is characterised in that: the support turns
Disk include a centrally located drive disk it is different with a plurality of outer diameters annular expand disk, it is described annular expand disk internal diameter and institute
It states driving disk diameter to match, the annular expands 2.6 times of the outer diameter of disk for different auto model lengths of wagon to be studied, choosing
It selects the suitable annular of outer diameter and expands disk and be socketed and be fixed on the drive disk and form the supporting wheel outside.
3. the method according to claim 1 for reducing supporting surface boundary layer airflow and influencing, it is characterised in that: selection cross section
Support column is evenly distributed on circuit orbit and is projected according to circuit orbit radius as support column for the erect mast of drops
On, adjustment support column keeps its circular arc cylinder unified towards at the downstream of wind；It is fixedly connected with sliding block in the upper end of support column, and will
The sliding block is embedded in the circuit orbit.
4. a kind of vehicle wind tunnel test platform lifts the support frame of the supporting wheel including supporting wheel and from bottom, special
Sign is: the supporting wheel includes that the centrally located drive disk annular different with a plurality of outer diameters expands disk, the ring
Shape 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 drive disk
Outside, the diameter of the supporting wheel is 2.6 times of auto model vehicle body length to be studied, and the annular is expanded face of trying to get to the heart of a matter and is equipped with one heart
Circuit orbit, support frame as described above includes can be along the complex root support column of the supporting wheel radial translation, the height of the support column
Degree is 0.5m, is slidably connected on the circuit orbit at the top of the support column.
5. vehicle wind tunnel test platform according to claim 4, it is characterised in that: installed on the supporting wheel upper surface
There are the wheelbase and wheel tread adjusting mechanism for being fixed on different type auto model on the supporting wheel.
6. vehicle wind tunnel test platform according to claim 5, it is characterised in that: the wheelbase and wheel tread adjusting mechanism packet
It includes the Wheel mounting bracket being slidably connected on the supporting wheel and provides the fixed frame guide rail of limit for Wheel mounting bracket sliding,
The fixed frame guide rail include across the supporting wheel center of circle center rail and be symmetrically distributed in the sides of the center rail two sides
Guide rail, the Wheel mounting bracket are mounted on fixed frame guide rail by a plane four-bar linkage.
7. vehicle wind tunnel test platform according to claim 4, it is characterised in that: the cross section of the support column is water droplet
Shape.
8. vehicle wind tunnel test platform according to claim 4, it is characterised in that: support frame as described above further includes being horizontally mounted
Telescopic arm group on ground, the telescopic arm group are formed by the radial combination of more telescopic arms, and the outer end of the telescopic arm is corresponding
It is fixedly connected on the support column lower end.
9. vehicle wind tunnel test platform according to claim 4, it is characterised in that: be fixedly mounted below the supporting wheel
There is the driving motor for driving the drive disk rotation, the output end of the driving motor upward and is fixedly connected with a sliding tooth vertically
Wheel, the drive disk lower surface are fixedly connected with a transmission gear, and the transmission gear and the driving gear are intermeshed.
10. vehicle wind tunnel test platform according to claim 4, it is characterised in that: the upper end of support column is fixedly connected
There is sliding block, the sliding block is embedded in the circuit orbit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811440402.8A CN109556822B (en) | 2018-11-29 | 2018-11-29 | Method for reducing influence of boundary layer air flow of supporting surface and vehicle wind tunnel test platform |
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| CN201811440402.8A CN109556822B (en) | 2018-11-29 | 2018-11-29 | Method for reducing influence of boundary layer air flow of supporting surface and vehicle wind tunnel test platform |
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| CN109556822B CN109556822B (en) | 2023-11-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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