CN106768801A - A kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test - Google Patents
A kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test Download PDFInfo
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- CN106768801A CN106768801A CN201611092986.5A CN201611092986A CN106768801A CN 106768801 A CN106768801 A CN 106768801A CN 201611092986 A CN201611092986 A CN 201611092986A CN 106768801 A CN106768801 A CN 106768801A
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- rotary shaft
- wind tunnel
- expansion set
- axle
- yaw angle
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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
- G01M9/02—Wind tunnels
- G01M9/04—Details
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Abstract
The double rotary shaft yaw angle converting means of a kind of high accuracy for wind tunnel test, in order to the continuous transformation of wind tunnel test side-slip angle is realized, so as to improve wind tunnel test efficiency.It includes rotary shaft one, rotary shaft two, expanding cover locking unit and encoder, the rotary shaft one is L-shaped, its horizontal position and rotary shaft two for constituting L-shaped are fixed in two shaft coupling pieces by self-lubricating bearing respectively, the worm gear one of the Worm Wheel System group of axle one is fixed in rotary shaft one, the worm gear two of the Worm Wheel System group of axle two is fixed in rotary shaft two, and the horizontal position end of rotary shaft one and one end of rotary shaft two are respectively equipped with expanding cover locking unit.The rotation that the present invention passes through itself two axle, realizes yaw angle continuous transformation in range ability.Encoder is provided with two axles, it is ensured that angular transformation accuracy, meanwhile, it is respectively provided with expanding cover locking unit in the end of two axles, it is ensured that the stability of two axles during blowing test.
Description
Technical field：
The present invention is a kind of model in wind tunnel yaw angle converting means, will to meet the wind tunnel test under different attitude angles
Ask, belong to aviation aerodynamic force wind-tunnel technique field, and in particular to a kind of double rotary shaft sides of high accuracy for wind tunnel test
Sliding angular transformation device.
Background technology：
Aerodynamics is air movement and air and object phase interaction when having relative motion between research air and object
With the specialism of rule.In aviation field, mainly exploratory flight device (mainly aircraft, also including helicopter and guided missile) exists
The principle flown in air, acts on carry-on air force with aircraft geometric shape, flight attitude, Mach number, Reynolds
The Changing Pattern of the Fundamentals such as number, and meet the geometrical property of aircraft and part required by certain aerodynamic quality.
Interaction rule when wind tunnel test is flow behavior, air and the relative motion of object of the technique study air using experiment
And other aerodynamics problems, it is exactly according to motion composition principle, by the model of aircraft or in kind solid simply
It is scheduled in ground artificial environment (wind-tunnel), artificially manufactures air current flow, aerial various complicated state of flights are simulated with this, obtains
Experimental data.
, it is necessary to enter line translation to the attitude of model during wind tunnel test, to obtain the aerodynamic data under different condition,
Model sideslip angular transformation is the important content of one of which.At present, generally breakked away using solid block formula as shown in Figure 1 in wind-tunnel
Conversion joint, the solid block joint weight in current wind-tunnel is larger, changes more laborious, typically only processes a few；It is simultaneously solid
The angle density of block joint is minimum 1 °, it is impossible to obtain other the focus true value in addition to fixed angle.Which can only be real
Existing a small number of side-slip angle conversion, a solid block joint of angle correspondence one, wastes time and energy；And the resistance of different sideslip angle joints
Plug degree size and rigidity are also inconsistent, and then produce influence to Flow Field in Wind Tunnel control and angular flexibility amendment；Simultaneously because solid
It is difficult to be found after the positioning key abrasion of block formula sideslip joint, is not easy to repair, so just generates side-slip angle error, and it is solid
The finished product expanding cover locking part of block formula sideslip joint needs to tighten multiple screws in fastening, needed during release it is special move back nail,
It is cumbersome.
The content of the invention：
The invention provides a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test, the purpose is to for
Wind tunnel test side-slip angle continuous transformation is realized, block formula sideslip angle joint admittedly is substituted currently, so as to improve wind tunnel test efficiency.
The double rotary shaft yaw angle converting means of high accuracy for wind tunnel test of the invention, including rotary shaft one, rotation
The gear unit of axle two, expanding cover locking unit and measuring unit, the rotary shaft one are L-shaped, its constitute L-shaped horizontal position and rotation
Rotating shaft two is fixed in two shaft coupling pieces by self-lubricating bearing respectively, and the gear unit includes the Worm Wheel System group of axle one
With the Worm Wheel System group of axle two, the worm gear one of the Worm Wheel System group of axle one is fixed in rotary shaft one, the worm and gear of axle two
The worm gear two of transmission group is fixed in rotary shaft two, and the horizontal position end of rotary shaft one and one end of rotary shaft two are respectively equipped with
Expanding cover locking unit.
As a further improvement on the present invention, the expanding cover locking unit include expansion set overcoat, expansion set inner sleeve, expansion set lid,
Expansion set seat, expansion set overcoat is set in outside expansion set inner sleeve, and expansion set lid is arranged at the outside of expansion set inner sleeve by bearing, and expansion set seat is located at
The outer end of expansion set inner sleeve.Expanding cover locking unit is consequently formed, locking positioning is carried out to rotary shaft one and rotary shaft two, make two axles
Stop the rotation.
As a further improvement on the present invention, the measuring unit is encoder.Can quickly and accurately be examined by encoder
Measure the anglec of rotation of rotary shaft one and rotary shaft two.
As a further improvement on the present invention, the worm screw one of the Worm Wheel System group of axle one and the Worm Wheel System group of axle two
One end of worm screw two be respectively equipped with handle.Rotary worm one and worm screw two are easy to by rotary handle, so as to drive two axles to revolve
Turn.
As a further improvement on the present invention, radome fairing is connected with the vertical position for constituting rotary shaft one.By rectification
Cover carrys out combing and stops air-flow, is easy to the present apparatus smooth flight in wind-tunnel.
As a further improvement on the present invention, the rotary shaft one is provided with thrust bearing.Born by thrust bearing
Axial force suffered by rotary shaft one.
As a further improvement on the present invention, the end of the horizontal position of the rotary shaft one is provided with fiaring cone, fiaring cone
Afterbody insertion expansion set seat in.Reduce the interference of wind tunnel experiment mechanism windward side by fiaring cone, because rotary shaft two will also
Pole and model involved by connection wind tunnel experiment mechanism, model are that windward, therefore its end need not install fiaring cone, the mould
Type is exactly the scale model of the aircraft such as aircraft or guided missile.
The beneficial effects of the invention are as follows：The present invention is provided with two rotary shafts, and two rotary shafts pass through self-lubricating axle respectively
Hold and be serially connected in two shaft coupling pieces, can be rotated rotating around own axes, the rotation that two rotary shafts pass through itself is realized
The continuous transformation of yaw angle in range ability, specifically carries out continuous change at any angle in 0~8 ° of angular range
Change.Yaw angle continuous transformation can obtain the actual value of any focus on trial curve, and discrete testing site is encrypted,
Overcoming solid block formula sideslip angle joint can only utilize a few click-through row interpolation to obtain the error that trial curve brings, so as to carry
Wind tunnel test accurate data degree high.Encoder is provided with each rotary shaft, so as to ensure that the accuracy of angular transformation,
Meanwhile, it is configured with expanding cover locking unit in the end of two rotary shafts, it is ensured that rotary shaft one and rotary shaft two during blowing test
Stability.Device of the invention can obtain any side-slip angle in range ability, and easy to operate, reliability is high；Two
Rotary shaft is installed from self-lubricating bearing, and physical dimension is small so that blockage percentage is small and non-maintaining；Gear unit of the invention
From the Worm Wheel System group of double helical pitches, its sideshake is easily adjusted, ease of assembly and maintenance；The present invention uses expanding cover locking unit pair
The rotation of two axles carries out locking positioning, in concrete operations, only needs forward and reverse rotation expansion set seat to fasten two axles or unclamp to two
The fastening of axle, its is easy to operate, time saving and energy saving.
Brief description of the drawings：
Fig. 1 is conventional 8 degree solid block joint schematic diagram；
Fig. 2 is cross-sectional view of the invention；
Fig. 3 is the profile of A-A in Fig. 1；
Fig. 4 is the profile of B-B in Fig. 1；
Fig. 5 is the structural representation of expanding cover locking unit；
Fig. 6 is the schematic diagram of expansion set inner sleeve.
Specific embodiment：
Converting means of the invention is for carrying out carrying fixed to dummy vehicle in wind tunnel experiment, by this hair
Angular transformation of the bright converting means in wind-tunnel reaches the purpose for making dummy vehicle that angular transformation is carried out in wind-tunnel.
Reference picture 2, Fig. 3 and Fig. 4, this is used for the double rotary shaft yaw angle converting means of high accuracy of wind tunnel test, including rotation
Rotating shaft 1, rotary shaft 27, gear unit, expanding cover locking unit 3 and measuring unit 4, the rotary shaft 1 are L-shaped, its composition
The horizontal position and rotary shaft 27 of L-shaped are fixed in two shaft coupling pieces 6 by self-lubricating bearing 8 respectively, the water of rotary shaft 1
The axis at flat position and the axis of rotary shaft 27 are not parallel, and angle between the two is 8 °, and the gear unit includes axle
One Worm Wheel System group and the Worm Wheel System group of axle two, the worm gear 1 of the Worm Wheel System group of axle one are fixed on rotary shaft
On one 1, the worm gear 2 11 of the Worm Wheel System group of axle two is fixed in rotary shaft 27, the horizontal position end of rotary shaft 1 and
One end of rotary shaft 27 is respectively equipped with expanding cover locking unit 3.The worm screw 1 and the worm gear snail of axle two of the Worm Wheel System group of axle one
One end of the worm screw 2 19 of bar transmission group is respectively equipped with handle 12.Radome fairing is connected with the vertical position for constituting rotary shaft 1
5.The rotary shaft 1 is provided with thrust bearing 18, and thrust bearing 18 is located at the corner of rotary shaft 1.The measuring unit 4
It is encoder.
Reference picture 2, Fig. 5 and Fig. 6, the expanding cover locking unit 3 include expansion set overcoat 13, expansion set inner sleeve 14, expansion set lid 15,
Expansion set seat 17, expansion set overcoat 13 is set in outside expansion set inner sleeve 14, and expansion set lid 15 is arranged at the outer of expansion set inner sleeve 14 by bearing 16
Side, expansion set seat 17 is located at the outer end of expansion set inner sleeve 14.The end of the horizontal position of the rotary shaft 1 is provided with fiaring cone 9, whole
In the afterbody insertion expansion set seat 17 of flow cone 9.
The present invention is a kind of model in wind tunnel posture changing device, its be it is a kind of can with the 2 of continuous transformation yaw angle from
By spending mechanism.The α angles change of the device combination wind-tunnel attack angle mechanism, by itself two axles, i.e. rotary shaft 1 and rotary shaft two
7 rotary motion come realize side-slip angle convert.When rotary shaft 24 rotates the angles of γ 1 from vertical state state, by rotary shaft two
7 project in X-Y and X-Z faces respectively, and projection is angle of attack angle of attack and yaw angle β with X-Y axles, the angle of X-Z.By geometry
Relation can be obtained
According to geometrical relationship, have
Wherein, a is projected length of the axis of rotary shaft 27 in wind-tunnel X-Y plane；B is that rotary shaft 27 is in level or perpendicular
In wind-tunnel Y-Z plane projected length under straight state；α is the angle of attack；β is yaw angle；γ 1 is that double rotating shafts are vertical from just pre- inclined 8 ° of angles of attack
The angle that position rotates around axle one (wind-tunnel X axis).
Thus, it is possible to the angle of attack walking amount and the amount of spin of axle one under correspondence yaw angle are obtained, then by rotating rotary shaft
27 by the model leveling of the present apparatus.So realize change the attack angle mechanism angle of attack and double rotating shafts (rotary shaft one 1, rotary shaft
2 angle 7), it is achieved thereby that the replacing of model yaw angle.
The running of package unit is：
According to the yaw angle and direction to be converted, wind-tunnel attack angle mechanism stroke value and rotary shaft one 1, rotary shaft are determined
The angle value (previous calibration) of rotation required for 27.Rotary shaft 1 is driven to rotate using the Worm Wheel System group of axle one, it is ensured that
Encoder indicating value in rotary shaft 1 is corresponding with previous calibration value, the expanding cover locking unit 3 of locking rotary shaft 1 end, allows rotation
Rotating shaft 1 stops operating.Attack angle mechanism stroke is adjusted according to previous calibration table numerical value, the axis of rotary shaft 27 is in level
In face.The Worm Wheel System group of adjustment axis two so that model roll angle is zero (level), it zero refers to winged that model roll angle is
The both sides wing or missile wing corresponding point position of row device model are supplied in sustained height, the encoder count now recorded in rotary shaft 27
Subsequent reference, the expanding cover locking unit 3 of locking rotary shaft 27 end, allows rotary shaft 27 to stop operating.After the completion of above-mentioned work
Can be tested.
Claims (7)
1. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test, including rotary shaft one (1), rotary shaft two
(7), gear unit, expanding cover locking unit (3) and measuring unit (4), the rotary shaft one (1) are L-shaped, its water for constituting L-shaped
Flat position and rotary shaft two (7) are fixed in two shaft coupling pieces (6) by self-lubricating bearing (8) respectively, the gear unit bag
The Worm Wheel System group of axle one and the Worm Wheel System group of axle two are included, the worm gear one (10) of the Worm Wheel System group of axle one is fixed on
In rotary shaft one (1), the worm gear two (11) of the Worm Wheel System group of axle two is fixed in rotary shaft two (7), rotary shaft one (1)
One end of horizontal position end and rotary shaft two (7) is respectively equipped with expanding cover locking unit (3).
2. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test as claimed in claim 1, its feature
It is：The expanding cover locking unit (3) includes expansion set overcoat (13), expansion set inner sleeve (14), expansion set lid (15), expansion set seat (17),
Expansion set overcoat (13) is set in expansion set inner sleeve (14) outward, and expansion set lid (15) is arranged at the outer of expansion set inner sleeve (14) by bearing (16)
Side, expansion set seat (17) is located at the outer end of expansion set inner sleeve (14).
3. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test as claimed in claim 1, its feature
It is：The measuring unit (4) is encoder.
4. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test as claimed in claim 1, its feature
It is：One end difference of the worm screw one (2) of the Worm Wheel System group of axle one and the worm screw two (19) of the Worm Wheel System group of axle two
It is provided with handle (12).
5. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test as claimed in claim 1, its feature
It is：Radome fairing (5) is connected with the vertical position for constituting rotary shaft one (1).
6. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test as claimed in claim 1, its feature
It is：The rotary shaft one (1) is provided with thrust bearing (18).
7. a kind of double rotary shaft yaw angle converting means of high accuracy for wind tunnel test as claimed in claim 2, its feature
It is：The end of the horizontal position of the rotary shaft one (1) is provided with fiaring cone (9), the afterbody insertion expansion set seat of fiaring cone (9)
(17) in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092986.5A CN106768801B (en) | 2016-12-02 | 2016-12-02 | High-precision double-rotating-shaft side slip angle conversion device for wind tunnel test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092986.5A CN106768801B (en) | 2016-12-02 | 2016-12-02 | High-precision double-rotating-shaft side slip angle conversion device for wind tunnel test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106768801A true CN106768801A (en) | 2017-05-31 |
| CN106768801B CN106768801B (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611092986.5A Active CN106768801B (en) | 2016-12-02 | 2016-12-02 | High-precision double-rotating-shaft side slip angle conversion device for wind tunnel test |
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| CN (1) | CN106768801B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450601A (en) * | 2017-08-02 | 2017-12-08 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of change yaw angle mechanism suitable for high-speed wind tunnel |
| CN108760221A (en) * | 2018-05-31 | 2018-11-06 | 北京空天技术研究所 | Wind tunnel test guiding device |
| CN112798217A (en) * | 2021-03-23 | 2021-05-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Follow-up compensation mechanism for wind tunnel test with continuously variable sideslip angle |
| CN114279674A (en) * | 2021-12-29 | 2022-04-05 | 中国空气动力研究与发展中心高速空气动力研究所 | Double-rotating-shaft supporting mechanism with variable front shaft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450601A (en) * | 2017-08-02 | 2017-12-08 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of change yaw angle mechanism suitable for high-speed wind tunnel |
| CN108760221A (en) * | 2018-05-31 | 2018-11-06 | 北京空天技术研究所 | Wind tunnel test guiding device |
| CN108760221B (en) * | 2018-05-31 | 2020-05-19 | 北京空天技术研究所 | Wind tunnel test guiding device |
| CN112798217A (en) * | 2021-03-23 | 2021-05-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Follow-up compensation mechanism for wind tunnel test with continuously variable sideslip angle |
| CN114279674A (en) * | 2021-12-29 | 2022-04-05 | 中国空气动力研究与发展中心高速空气动力研究所 | Double-rotating-shaft supporting mechanism with variable front shaft |
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| CN106768801B (en) | 2023-06-06 |
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