CN112014059B - Back support mechanism for wind tunnel experiment - Google Patents
Back support mechanism for wind tunnel experiment Download PDFInfo
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- CN112014059B CN112014059B CN202010850814.XA CN202010850814A CN112014059B CN 112014059 B CN112014059 B CN 112014059B CN 202010850814 A CN202010850814 A CN 202010850814A CN 112014059 B CN112014059 B CN 112014059B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
A back support mechanism for wind tunnel experiments comprises: the yaw movement mechanism and the pitch movement mechanism are superposed together to respectively realize the yaw angle and the pitch angle of the wind tunnel experiment model. The pitching motion mechanism is fixed on a yawing motion plate in the yawing motion mechanism, and the wind tunnel experiment model is fixed on a model support arm in the pitching motion mechanism. The back support mechanism for the wind tunnel experiment can realize linkage of yaw motion and pitching motion. The invention adopts the motion principle of a plane crank-slider mechanism to convert linear motion into rotary motion, and the linear motion is obtained by a spiral transmission mode. The mechanism has the advantages of high rigidity, high bearing capacity and high reliability, and provides guarantee for a wind tunnel model experiment adopting a back support mode.
Description
Technical Field
The invention relates to a back support mechanism for a wind tunnel experiment, and belongs to the technical field of wind tunnel experiments.
Background
The wind tunnel experiment is a crucial ring in the aircraft development process, and can provide reliable reference basis for appearance optimization, structural design and the like. According to the wind tunnel experiment, an aircraft model is fixed in a wind tunnel according to a relativity principle, and the flying process of the aircraft in the atmosphere is simulated by changing the speed of airflow. The fixed supporting technology of the aircraft model in the wind tunnel comprises tail support, back support, abdomen support, bracing wire support and the like, wherein the tail support is the most common supporting mode, but for some aircraft models with narrow tails or aircraft models needing strict simulation of tail shapes, the tail support mode cannot be adopted, the back support mode is sometimes a better supporting mode, and the interference to experimental data is small.
Disclosure of Invention
The technical problem solved by the invention is as follows: make up the not enough of current tail supporting technology, provide a back of body supporting mechanism for wind-tunnel experiment, widen wind-tunnel experimental ability, guarantee that the experimental data is more accurate.
The technical solution of the invention is as follows:
a back support mechanism for wind tunnel experiments comprises: and the yaw movement mechanism and the pitching movement mechanism are matched to realize the pitch angle and the yaw angle of the wind tunnel experimental model.
The yawing motion mechanism comprises a yawing base, a yawing arc-shaped guide rail I, a yawing arc-shaped guide rail II, a yawing motion plate, a yawing connecting rod, a yawing sliding block, a yawing screw rod, a support and a locking hoop;
the yaw base is rectangular and is fixed on an upper wall plate of the wind tunnel through bolt holes on the periphery, a slot is processed in the center, a yaw arc-shaped guide rail I and a yaw arc-shaped guide rail II are installed on the upper surface, the radiuses of the two arcs are different, and the centers of the arcs are enabled to be coincident when the yaw base is installed; the yawing motion plate is in a T shape, a T-shaped vertical beam is deviated to one side of a cross beam, the vertical beam penetrates through a square groove in the center of the yawing base and is inserted into the wind tunnel, the cross beam is fixed on rolling sliders of the yawing arc-shaped guide rail I and the yawing arc-shaped guide rail II through bolts, one end of a yawing connecting rod is hinged to the yawing motion plate, the other end of the yawing connecting rod is hinged to the yawing slider, the yawing slider and a yawing lead screw form a spiral transmission structure, the yawing lead screw rotates, the yawing slider moves along the axis direction of the lead screw, a yawing lead screw support is fixed on the upper surface of the cross beam of the yawing base and supports the yawing lead screw, and meanwhile one end of the yawing lead screw penetrates through a locking hoop.
The center of the beam part of the yawing motion plate is provided with a square groove which is positioned right above the square groove on the yawing base;
bearings are arranged at the hinged parts at the two ends of the yawing connecting rod;
the yawing screw and the support comprise a screw, two supports and a locking hoop, wherein the supports are fixed on a yawing base, support two ends of the yawing screw, and the locking hoop is fixed on the yawing base, so that the yawing screw can be prevented from rotating.
The pitching motion mechanism comprises a pitching motion lead screw, a support, a pitching slide block, a driving motor, a speed reducer, a pitching motion connecting rod, a pitching arc-shaped guide rail I, a pitching arc-shaped guide rail II, a pitching motion plate and a model support arm;
the pitching motion support is fixed on a cross beam of the yawing motion plate and supports a pitching motion lead screw, one end of the pitching motion lead screw is connected with a driving motor and a speed reducer, a pitching motion sliding block and the pitching motion lead screw form spiral transmission, the pitching motion sliding block moves along the axis of the pitching motion lead screw when the pitching motion lead screw rotates, one end of a pitching motion connecting rod is connected with the pitching motion sliding block, and the other end of the pitching motion connecting rod is connected with the pitching motion plate; the pitching motion plate is fixed on the rolling sliding blocks of the pitching arc-shaped guide rail I and the pitching arc-shaped guide rail II through bolts; the model support arm is fixedly connected to the pitching motion plate and moves along with the pitching motion plate; the pitching arc-shaped guide rail I and the pitching arc-shaped guide rail II are fixed on a vertical beam of the T-shaped yawing moving plate through bolts.
The radii of the pitching arc-shaped guide rail I and the pitching arc-shaped guide rail II are different, and the rotating circle centers are overlapped;
the pitching sliding block and the pitching screw form a spiral transmission mechanism, and the rotation motion of the pitching sliding block is limited;
one end of the pitching screw rod is connected with the driving motor and the speed reducer and rotates under the driving action of the motor.
The included angle between the model support arm and the axial line of the pitching screw is any angle value between 30 degrees and 60 degrees.
The invention has the beneficial effects that:
(1) the invention makes up the defects of the tail support technology, can ensure that the tail part is not interfered in the wind tunnel experiment process by adopting the back support mode of the aircraft model,
(2) the invention widens the experimental capability of the existing wind tunnel, and provides powerful technical support for the wind tunnel experiment of a complex aircraft, particularly an aircraft with a special tail.
Drawings
FIG. 1 is an external view of the present invention;
FIG. 2 is a yaw motion mechanism diagram of the present invention;
FIG. 3 is a schematic view of a yaw motion plate of the present invention;
FIG. 4 is a pitch motion mechanism diagram of the present invention;
FIG. 5 is a schematic representation of the present invention applied to an existing wind tunnel;
in the figure:
1. yawing motion mechanism, 2, pitching motion mechanism
11. The yawing system comprises a yawing base 12, yawing arc-shaped guide rails I and 13, yawing arc-shaped guide rails II and 14, a yawing motion plate 15, a yawing connecting rod 16, a yawing sliding block 17, a yawing lead screw 18, a locking hoop 21, a pitching lead screw 22, a pitching sliding block 23, a driving motor and a speed reducer 24, a pitching connecting rod 25, pitching arc-shaped guide rails I and 26, pitching arc-shaped guide rails II and 27, pitching motion plates 28 and a model support arm.
Detailed Description
The back support mechanism for the wind tunnel experiment comprises a yaw movement mechanism 1 and a pitching movement mechanism 2, wherein the yaw movement mechanism and the pitching movement mechanism operate independently, the yaw movement mechanism is driven in a manual mode, and the pitching movement mechanism is driven in an electric mode. As shown in FIG. 5, the invention is installed on the upper wall plate of the existing wind tunnel test section, is fixed by bolts, fully utilizes the given space, has small size and high rigidity, can ensure that the attitude of the wind tunnel test model is changed, simultaneously bears the aerodynamic load borne by the aircraft model, and meets the requirements of the wind tunnel test.
As shown in figure 1, the back support mechanism for the wind tunnel experiment comprises a yaw movement mechanism and a pitching movement mechanism, a superposition mode is adopted, the pitching movement mechanism takes a yaw movement plate in the yaw movement mechanism as a fixed support, a pitching connecting rod, a pitching movement plate and the like penetrate through a center square groove of the yaw movement plate and a yaw base and are arranged in the wind tunnel together with a vertical beam part of the yaw movement plate, one end of a model support arm is connected with the pitching movement plate, and the other end of the model support arm is connected with an aircraft.
As shown in fig. 2, the yaw movement mechanism of the present invention is shown. The yawing base 11 is fixed on an upper wall plate of a wind tunnel, a through groove is formed in the center of the yawing base 11, a yawing arc guide rail I and a yawing arc guide rail II are fixed on the yawing base 11, the circle centers of the yawing arc guide rail I and the yawing arc guide rail II are overlapped, a yawing motion plate 14 is in a T shape, a cross beam part is fixed on the yawing arc guide rail I12 and the yawing arc guide rail II 13, a vertical beam part penetrates through the through groove in the center of the yawing base 11, one end of a yawing connecting rod 15 is hinged with the yawing motion plate, the other end of the yawing connecting rod is hinged with a yawing sliding block 16, the yawing sliding block and a yawing lead screw form a spiral transmission structure, the rotary motion of the yawing sliding block 16 is limited, a yawing lead screw support supports a yawing lead screw and is fixed on the yawing base, and one end of a yawing lead screw 17 penetrates through a locking hoop fixed on the yawing base.
The yawing screw 17 rotates, the yawing sliding block 16 moves along the axis of the screw, the yawing connecting rod 15 drives the yawing motion plate 14 to rotate along the yawing arc-shaped guide rails I12 and II 13, the rotation center of the yawing arc-shaped guide rails I12 and II 13 is the circle center of the yawing arc-shaped guide rails I12 and II 13, and the rotation angle is determined according to the movement distance of the yawing sliding block 16 and the angle range corresponding to the yawing arc-shaped guide rails I12. The yaw lead screw is locked by the locking hoop 18, so that the yaw movement mechanism is braked.
As shown in figure 3, the yawing motion plate is in a T-shaped shape, a vertical beam is deviated to one side of a cross beam, and a square groove is formed in the middle of the cross beam part and is used as a mounting base of a pitching motion mechanism.
As shown in fig. 4, the pitch mechanism of the present invention is shown. The motor drives the pitching screw rod to rotate through the speed reducer 23, the pitching slide block 22 moves along the axis of the screw rod according to the principle of screw transmission, the pitching motion plate 27 rotates along the track defined by the pitching arc-shaped guide rails I25 and II 26 through the pitching connecting rod 24, and the model supporting arm 28 is fixedly connected to the pitching motion plate 27 and moves along with the pitching motion plate 27. In a vertical plane, the pitching arc-shaped guide rail I25 rotates at the center of a circle, so that the pitching attitude of the aircraft model is changed.
The working process of the invention is as follows:
the utility model provides a back of body supporting mechanism for wind-tunnel experiments, contains driftage motion and every single move motion, and the motion of two kinds of mechanisms is relatively independent, can operate respectively, and each other noninterference.
The motion process of the yaw motion mechanism is as follows: the driftage lead screw rotates, according to the screw drive principle, the driftage slider makes linear motion, by plane slider-crank mechanism operation principle, through the driftage connecting rod, the rotary motion is made to the driftage motion board, and the rotatory center of rotation is the centre of a circle that driftage arc guide I and driftage arc guide II confirmed. When the yawing attitude of the aircraft meets the requirement of a specified angle, the yawing screw rod is fixed through the locking hoop to prevent the yawing screw rod from rotating, so that the yawing attitude of the aircraft model is fixed.
The movement process of the pitching movement mechanism is as follows: the motor passes through the reduction gear drive every single move lead screw and rotates, according to the screw drive principle, every single move slider removes along the lead screw axis, and through the every single move connecting rod, every single move motion board rotates along the orbit that every single move arc guide rail I and II injectd, and the center of rotation is the centre of a circle of arc guide rail, and the model support arm links firmly on every single move motion board, moves along with it. When the pitching attitude of the aircraft meets the requirement of a specified angle, the motor brakes, and the pitching screw stops rotating, so that the pitching attitude of the aircraft model is changed.
The yawing motion mechanism and the pitching motion mechanism are superposed together, act together and do not interfere with each other.
In this embodiment:
the back support mechanism for the wind tunnel experiment can be designed according to the size of a wind tunnel test section, and theoretically, the range of the yaw angle and the range of the pitching angle can be both-90 degrees to 90 degrees. In the embodiment, the wind tunnel is designed based on the existing wind tunnel, the factors such as the size of the wind tunnel and the attitude requirement of the model are comprehensively considered, the range of the yaw angle is set to be-8 degrees, and the range of the pitch angle is set to be-6-10 degrees.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are not particularly limited to the specific examples described herein.
Claims (9)
1. The utility model provides a back supporting mechanism for wind tunnel experiments which characterized in that includes: the yaw movement mechanism and the pitching movement mechanism adopt a spiral transmission mechanism to transmit power, and a plane crank slider mechanism converts linear motion into rotary motion so as to adjust the yaw angle and the pitch angle of the wind tunnel experiment model; the yaw movement mechanism and the pitching movement mechanism adopt a superposition mode, namely a yaw movement plate of the yaw movement mechanism is a fixed support of the pitching movement mechanism, and a pitching movement plate of the pitching movement mechanism is connected with the wind tunnel experiment model through a model support arm; the yaw movement mechanism and the pitching movement mechanism respectively and independently operate;
the pitching motion mechanism comprises a pitching motion lead screw, a pitching slide block, a driving motor, a speed reducer, a pitching motion connecting rod, a pitching arc-shaped guide rail I, a pitching arc-shaped guide rail II and a pitching motion plate;
the pitching motion screw rod is fixed above the beam part of the yawing motion plate through the pitching motion support, one end of the pitching motion screw rod is connected with the driving motor and the speed reducer, the pitching motion sliding block and the pitching motion screw rod form spiral transmission, one end of the pitching motion connecting rod is connected with the pitching motion sliding block, the other end of the pitching motion connecting rod is connected with the pitching motion plate, meanwhile, the pitching motion plate is arranged on the pitching arc-shaped guide rail I and the pitching arc-shaped guide rail II, and the pitching arc-shaped guide rail I and the pitching arc-shaped guide rail II are arranged on the vertical beam part of the yawing motion plate;
the yawing motion mechanism comprises a yawing base, a yawing arc-shaped guide rail I, a yawing arc-shaped guide rail II, a yawing motion plate, a yawing connecting rod, a yawing sliding block, a yawing screw rod and a locking hoop;
the yawing base is fixed on an upper wall plate of a wind tunnel, the center of the yawing base is provided with a through groove, a yawing arc guide rail I and a yawing arc guide rail II are fixed on the yawing base, the circle centers of the yawing arc guide rail I and the yawing arc guide rail II are superposed, a yawing motion plate is in a T shape, a cross beam part is installed on the yawing arc guide rail I and the yawing arc guide rail II, a vertical beam part penetrates through the through groove in the center of the yawing base, one end of a yawing connecting rod is hinged with the yawing motion plate, the other end of the yawing connecting rod is hinged with a yawing sliding block, the yawing sliding block and a yawing lead screw form a spiral transmission structure, the yawing lead screw is supported and fixed on the yawing base through a yawing lead screw support, and one end of the yawing lead screw penetrates through a locking hoop fixed on the yawing base.
2. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the yawing arc-shaped guide rail I is two sections of arc guide rails which are concentric and have the same radius, and the yawing arc-shaped guide rail II and the yawing arc-shaped guide rail I are concentric and have the radius larger than the arc radius of the yawing arc-shaped guide rail I.
3. The back support mechanism for the wind tunnel experiment according to claim 2, wherein: the yawing arc-shaped guide rail I, the yawing arc-shaped guide rail II, the yawing motion plate, the yawing connecting rod and the yawing sliding block form a plane crank sliding block mechanism of the yawing motion mechanism, and the yawing motion plate rotates by taking the circle center of the yawing arc-shaped guide rail I as the center.
4. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the yawing sliding block is fixedly connected with a linear guide rail installed on the yawing base so as to limit the rotating motion of the yawing sliding block.
5. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the pitching arc-shaped guide rail I and the pitching arc-shaped guide rail II are two sections of arc-shaped guide rails with different radiuses, and the rotation centers of the two arc-shaped guide rails are overlapped.
6. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the pitching arc-shaped guide rail I, the pitching arc-shaped guide rail II, the pitching motion plate, the pitching connecting rod and the pitching slide block form a plane crank slide block mechanism of the pitching motion mechanism, and the pitching motion plate rotates by taking the circle center of the pitching guide rail I as the center.
7. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the pitching sliding block is fixedly connected with a linear guide rail arranged above the beam part of the yawing moving plate so as to limit the rotating movement of the pitching sliding block.
8. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the range of the yaw angle is set to be-8 degrees to 8 degrees, and the range of the pitch angle is set to be-6 degrees to 10 degrees.
9. The back support mechanism for the wind tunnel experiment according to claim 1, wherein: the included angle between the model support arm and the axial line of the pitching screw is any angle value between 30 degrees and 60 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010850814.XA CN112014059B (en) | 2020-08-21 | 2020-08-21 | Back support mechanism for wind tunnel experiment |
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| CN202010850814.XA CN112014059B (en) | 2020-08-21 | 2020-08-21 | Back support mechanism for wind tunnel experiment |
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| CN112014059B true CN112014059B (en) | 2022-09-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112254921B (en) * | 2020-12-21 | 2021-04-16 | 西南交通大学 | High-speed wind tunnel three-degree-of-freedom model supporting mechanism |
| CN115597820B (en) * | 2022-12-15 | 2023-03-21 | 中国空气动力研究与发展中心超高速空气动力研究所 | Yaw mechanism of large hypersonic-velocity high-temperature wind tunnel model feeding system |
| CN115597822B (en) * | 2022-12-15 | 2023-03-14 | 中国空气动力研究与发展中心超高速空气动力研究所 | Axial translation mechanism of large hypersonic high-temperature wind tunnel model feeding system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494865A (en) * | 2011-11-24 | 2012-06-13 | 北京航空航天大学 | Simulation apparatus of pitching/jawing/rolling over three-freedom degree forced movement of aircraft |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1083384A (en) * | 1977-07-07 | 1980-08-12 | Anatoly V. Bykovsky | Device for suspension of aircraft model in wind tunnel |
| CN102095566B (en) * | 2009-12-11 | 2014-12-31 | 中国航空工业空气动力研究院 | Forced pitching-free yawing wind tunnel test device |
| CN106124157B (en) * | 2016-05-11 | 2018-11-06 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of space mechanism in six degree of freedom for the experiment of hypersonic wind tunnel Multi-bodies Separation |
| CN105784316B (en) * | 2016-05-11 | 2018-06-29 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of high rigidity embedded equipment for the experiment of hypersonic wind tunnel Multi-bodies Separation |
| CN205642793U (en) * | 2016-05-11 | 2016-10-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | A embedded device of high rigidity for separation of hypersonic wind tunnel multi -body is experimental |
| CN106885677B (en) * | 2016-12-31 | 2019-11-12 | 重庆大学 | Six degree of freedom wind tunnel test mechanism end composition error scaling method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494865A (en) * | 2011-11-24 | 2012-06-13 | 北京航空航天大学 | Simulation apparatus of pitching/jawing/rolling over three-freedom degree forced movement of aircraft |
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