CN105157949A - Model attack angle mechanism - Google Patents

Model attack angle mechanism Download PDF

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Publication number
CN105157949A
CN105157949A CN201510665895.5A CN201510665895A CN105157949A CN 105157949 A CN105157949 A CN 105157949A CN 201510665895 A CN201510665895 A CN 201510665895A CN 105157949 A CN105157949 A CN 105157949A
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CN
China
Prior art keywords
arc
angle
attack
sting
guide rail
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510665895.5A
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Chinese (zh)
Inventor
张德久
朱本华
姜裕标
姜德龙
梁频
沈志洪
耿子海
杨强
岳廷瑞
王大伟
金启刚
唐乔乔
阎丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Low Speed Aerodynamic Institute of Chinese Aerodynamic Research and Development Center
Original Assignee
Low Speed Aerodynamic Institute of Chinese Aerodynamic Research and Development Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Low Speed Aerodynamic Institute of Chinese Aerodynamic Research and Development Center filed Critical Low Speed Aerodynamic Institute of Chinese Aerodynamic Research and Development Center
Priority to CN201510665895.5A priority Critical patent/CN105157949A/en
Publication of CN105157949A publication Critical patent/CN105157949A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a model attack angle mechanism, comprising a lower supporting seat and an upper supporting seat arranged on the lower supporting seat; two arc guide rails are parallelly arranged on a same vertical plane of the upper supporting seat, and an arc tooth bar is arranged therebetween; a coupling mechanism moves along the arc guide rails under the effect of a driving mechanism so as to drive a tested model to continuously change an attack angle in a wind tunnel. According to the invention, in a wind tunnel test, a whole support body does not need to be arranged in a wind tunnel experimental area, and only the tested model, a tail pole and partial pre-bended pole are reserved in the wind tunnel experimental area, thereby minimizing the support mechanism influence to a wind tunnel flow field, and improving test precision; in addition, a supporting device is not in contact with wind tunnel walls, thereby reducing the supporting device influence to the wind tunnel flow field.

Description

A kind of angle of attack mechanism
Technical field
The present invention relates to wind tunnel test field, relate to a kind of angle of attack mechanism specifically.
Background technology
Carry out wind tunnel model test, need to use mounting system model support in wind-tunnel, realize the conversion to model attitude angle and control, conventional model support mode comprises belly stay, shoe, back up and is applicable to the bracing cable support etc. of open jet working section.No matter adopt which kind of supporting way, wherein angle of attack mechanism is the Focal point and difficult point of model supporting device development, and in process of the test, existing supporting way all needs supporting mechanism to be arranged in wind tunnel test district, and is fixed on wind-tunnel inwall.This bracing or strutting arrangement can have an impact to flow field, test site, and because be directly connected with hole wall, can because vibration makes to influence each other between hole wall and device.
On the basis of existing supporting way, Air Engineering Univ., PLA discloses a kind of single backflow Closed Tunnel angle of attack mechanism, publication number is the utility model of CN201320445905.0, a kind of tulwar structure is have employed in this file, at worm gear indoor design slide rail, tulwar can move along slide rail, thus the initial angle of attack of changing mechanism, angle of attack mechanism in the disclosure file can ensure accuracy and the accuracy requirement of experiment, achieves the experimental duties of At High Angle of Attack scope more flexibly.But the mechanism in the disclosure file is in the wind tunnel test process of reality, whole supporting mechanism still needs to be placed in wind tunnel test district, from substantial angle, does not solve the shortcoming in traditional support mode.
Summary of the invention
The object of this invention is to provide a kind of angle of attack mechanism, adopt brand-new structure and supporting way, make in process of the test, supporting mechanism does not need to be arranged in wind tunnel test district, only that model and pole are rotated in wind tunnel test district, realize the consecutive variations of tested angle of attack, complete test.
For achieving the above object, the present invention adopts following technical scheme:
A kind of angle of attack mechanism, comprising:
Undersetting and the upper bracket be arranged on undersetting, the same vertical plane of described upper bracket is set side by side with two arc-shaped guide rails, is provided with arc-shaped rack between two arc-shaped guide rails;
Web joint, the one side of described web joint is provided with driving mechanism, web joint another side is provided with gear and the guide rail slide block being separately positioned on gear upper and lower, is provided with locating device between gear and overlying guide rail slide block;
Two guide rail slide blocks on web joint and two arc-shaped guide rail position one_to_one corresponding on upper bracket and guide rail slide block is stuck on arc-shaped guide rail, gear is arranged between arc-shaped rack and below arc-shaped guide rail, and gear engages with the external tooth of arc-shaped rack, locating device is provided with two clamping sheets, the upper edge of arc-shaped rack is stuck between two clamping sheets, and whole web joint moves along arc-shaped guide rail under the driving of driving mechanism;
The top of web joint is connected with transition Connection Block, pre-bent sting, support sting, internal balance and model in turn;
Described two arc-shaped guide rails are coaxial with arc-shaped rack, and axis overlaps with support sting rotation center.
In technique scheme, the guide rail slide block below described gear is divided into two sections, and below gear, the center of two sections of guide rail slide blocks becomes to form isosceles triangle with the center of gear overlying guide rail slide block at grade.
In technique scheme, described pre-bent sting is divided into three sections, at grade, and the first paragraph of pre-bent sting and the 3rd section of inverse bending.
In technique scheme, one of them bending end of described pre-bent sting is affixed to transition Connection Block, and another bending section is connected with support sting, and the bending angle of the bending section be connected with support sting is variable.
In technique scheme, described support sting is directly connected with model, and described transition Connection Block is replaced by external balance.
A test method for angle of attack mechanism, comprises the following steps:
Step one: whole angle of attack mechanism is mounted on the rotating disk of ground, ground rotating disk is arranged on below test chamber;
Step 2: under test chamber, a window offered by wall rotating disk in hole, is extend into pre-to the support sting in angle of attack mechanism and part bent sting in wind tunnel test district by window and is connected and supports test model;
Step 3: slided on two arc-shaped guide rails by the driving mechanisms control web joint on angle of attack mechanism, and drive pre-bent sting, support sting and model mass motion, thus the consecutive variations of the implementation model angle of attack.
In technique scheme, described support sting rotation center all the time with the dead in line of wind-tunnel.
In the present invention, driving mechanism adopts mature technology, mainly comprise servo drive motor, reductor, driver output is on gear, control driving mechanism driven wheel by control system to rotate, gear engages with arc-shaped rack, thus control linkage plate arcuately guide rail move the change realized the pole anglec of rotation and control.
The present invention and prior art have the following advantages:
1) structure of the arc-shaped guide rail of the present invention's employing can realize the angle of attack continuable change in the scope of certain angle of tested model, realizes the function of existing supporting way;
2) one of them angle of the pre-bent sting in the present invention can change, by changing the change that this angle can realize the initial angle of attack of model, the control of attitudes vibration in larger scope can be realized carrying out in wind tunnel test process model by changing the initial angle of attack;
3) when the structure that the present invention adopts can be implemented in wind tunnel test, whole supporting mechanism main body does not need to be arranged in wind tunnel test district, pre-to tested model, support sting and part bent sting is only needed to stay in wind tunnel test district, reduce supporting mechanism to the impact of Flow Field in Wind Tunnel, improve the precision of test;
4) the whole mechanism of the present invention does not all contact with wind tunnel wall, therefore can not produce the problem that vibration is interfered in process of the test, can not have an impact to wind tunnel body;
5) the present invention is simple and compact for structure, convenient operating maintenance, can carry out combination control under the prerequisite not changing this body structure with other angle changing mechanisms.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is movable part structural representation of the present invention;
Fig. 3 is fixed part structural representation of the present invention;
Fig. 4 is the structural representation that the present invention installs on the rotating disk of ground;
Wherein: 1 support sting, 2 pre-bent stings, 3 transition Connection Blocks, 4 web joints, 5 driving mechanisms, 6 arc lower guide rails, 7 arc-shaped gears, arc-shaped guide rail on 8,9 undersettings, 10 upper brackets, 11 lower guideway slide blocks, 12 upper rail slide blocks, 13 is locating devices, and 14 is gears, and 15 is ground rotating disks, 16 is models, and 17 is angle of attack mechanisms.
Embodiment
Now the present invention will be further described by reference to the accompanying drawings.
Angle of attack mechanism of the present invention mainly comprises two parts, and one is fixed sturcture part, and one is the bascule part on fixed sturcture, realizes final effect by the motion of bascule.
As shown in Figure 2, be that bascule of the present invention mainly comprises two parts, a part drives coupling part, and be made up of web joint, driving mechanism, gear, top shoe, sliding block and locating device, driving mechanism is made up of servo drive motor and reductor.Driving mechanism is mounted in the one side of web joint, and the another side of web joint is provided with gear, and the power input of gear is provided by servo drive motor and reductor; Above gear, be provided with upper rail slide block, the below of gear is provided with lower guideway slide block, between upper rail slide block and gear, be provided with locating device; Lower guideway slide block is divided into two sections, is arranged on the both sides of gear vertical axis, and two lower guideway slide blocks and upper rail slide block form the layout of isosceles triangle.Servo drive motor, reductor, the ripe brand product of the equal selection standard of arc-shaped guide rail in the present invention, remaining part is non-standard de-sign.
A part is pole coupling part, comprises transition Connection Block, pre-bent sting, support sting.Transition Connection Block is arranged on the top of web joint, and transition Connection Block is connected with pre-bent sting, support sting in turn, the end link model of support sting.Pre-bent sting needs to can be designed as different pre-bending angles according to test, in order to satisfy the demand, pre-bent sting is divided into three sections, in same level, first paragraph and the 3rd section of bending round about, one end is connected with transition Connection Block, and the other end is connected with support sting, and one section of its bending angle be connected with support sting can change according to actual needs.
In actual tests, internal balance can be adopted also can to adopt external balance.When adopting internal balance, be arranged on after internal balance being connected to the end of support sting in model; When adopting external balance, support sting is directly connected with model, and substituted by transition Connection Block external balance, pre-bent sting is connected on external balance.
As shown in Figure 3, be fixed sturcture part of the present invention, comprise upper bracket and undersetting two parts, undersetting column adopts rectangular tube, upper bracket back side hollow welding well word rib, under guarantee rigidity requirement, and can alleviator weight.A face of upper bracket is fixedly installed two arc-shaped guide rails be parallel to each other, is provided with an arc-shaped rack between two arc-shaped guide rails, two arc-shaped guide rails and arc-shaped rack all be arranged in parallel and have identical radian measure.
As shown in Figure 1, it is integrated model schematic diagram of the present invention, bascule part is mounted in fixed sturcture part, lower guideway slide block on web joint is blocked on the arc lower guide rail on upper bracket face, upper rail slide block is stuck on arc-shaped guide rail, locating device has two clamping sheets, the upper edge of arc-shaped rack snaps between two clamping sheets, gear and arc-shaped rack engagement; Control driving mechanism driven wheel by control system to rotate, thus control whole movable part arcuately guide rail rotate, and movable part can be made accurately to rest on optional position on arc-shaped guide rail.When stopping in certain position, two clamping sheets that control gear controls on locating device inwardly clamp arc-shaped rack, and making movable part be fixed on this position can not slide.
While movable part slides on arc-shaped guide rail, by the effect of pre-bent sting and support sting, model also follows rotation, because upper and lower arc-shaped guide rail (R1, R2) and arc-shaped gear reference circle (R3) are coaxially in the present invention, axis overlaps with support sting rotation center, support sting rotation center (i.e. model reference geometric center) all the time with wind-tunnel dead in line, therefore angle of attack relative variation ranges 2 α as shown in Figure 1.
As shown in Figure 4, specific embodiment of the invention also needs to coordinate other devices, surface-based ground rotating disk is adopted in the present invention, in actual tests process, first the present invention is mounted on the rotating disk of ground, this ground rotating disk arranges the below with wind tunnel test district, under test chamber, a window is offered by wall rotating disk in hole, and the pre-bent sting of the part in the present invention, support sting extend in wind tunnel test district through window.In process of the test, the present invention does consecutive variations by the angle of attack of Electric Machine Control model in wind-tunnel, but remains within the scope of Flow Field in Wind Tunnel and only have model, support sting and the pre-bent sting of part.
In this example, the rotation center of model in wind-tunnel overlaps with the ground rotating disk centre of gyration in the projection of surface level.Ground rotating disk can realize ± 180 ° of rotations.Angle of attack mechanism and ground disk combination, just can realize the control to angle of attack and yaw angle attitudes vibration.

Claims (7)

1. an angle of attack mechanism, is characterized in that comprising:
Undersetting and the upper bracket be arranged on undersetting, the same vertical plane of described upper bracket is set side by side with two arc-shaped guide rails, is provided with arc-shaped rack between two arc-shaped guide rails;
Web joint, the one side of described web joint is provided with driving mechanism, web joint another side is provided with gear and the guide rail slide block being separately positioned on gear upper and lower, is provided with locating device between gear and overlying guide rail slide block;
Two guide rail slide blocks on web joint and two arc-shaped guide rail position one_to_one corresponding on upper bracket and guide rail slide block is stuck on arc-shaped guide rail, gear is arranged between arc-shaped rack and below arc-shaped guide rail, and gear engages with the external tooth of arc-shaped rack, locating device is provided with two clamping sheets, the upper edge of arc-shaped rack is stuck between two clamping sheets, and whole web joint moves along arc-shaped guide rail under the driving of driving mechanism;
The top of web joint is connected with transition Connection Block, pre-bent sting, support sting, internal balance and model in turn;
Described two arc-shaped guide rails are coaxial with arc-shaped rack, and axis overlaps with support sting rotation center.
2. a kind of angle of attack mechanism according to claim 1, is characterized in that the guide rail slide block below described gear is divided into two sections, and below gear, the center of two sections of guide rail slide blocks becomes to form isosceles triangle with the center of gear overlying guide rail slide block at grade.
3. a kind of angle of attack mechanism according to claim 1, is characterized in that described pre-bent sting is divided into three sections, at grade, and the first paragraph of pre-bent sting and the 3rd section of inverse bending.
4. a kind of angle of attack mechanism according to claim 3, it is characterized in that one of them bending end of described pre-bent sting is affixed to transition Connection Block, another bending section is connected with support sting, and the bending angle of the bending section be connected with support sting is variable.
5. a kind of angle of attack mechanism according to claim 1, is characterized in that described support sting is directly connected with model, and described transition Connection Block is replaced by external balance.
6., as the test method of any one angle of attack mechanism in claim 1,2,3,4,5, it is characterized in that comprising the following steps:
Step one: whole angle of attack mechanism is mounted on the rotating disk of ground, ground rotating disk is arranged on below test chamber;
Step 2: offer a window in hole wall rotating disk under test chamber, is extend into pre-to the support sting in angle of attack mechanism and part bent sting in wind tunnel test district by window and is connected and supports test model;
Step 3: slided on two arc-shaped guide rails by the driving mechanisms control web joint on angle of attack mechanism, and drive pre-bent sting, support sting and model mass motion, thus the consecutive variations of the implementation model angle of attack.
7. the test method of a kind of angle of attack mechanism according to claim 6, it is characterized in that described support sting rotation center all the time with the dead in line of wind-tunnel.
CN201510665895.5A 2015-10-16 2015-10-16 Model attack angle mechanism Pending CN105157949A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106017853A (en) * 2016-06-29 2016-10-12 湖北三江航天红阳机电有限公司 Attack angle adjusting device
CN106153288A (en) * 2016-08-24 2016-11-23 湖北三江航天红阳机电有限公司 A kind of wind tunnel test attack angle mechanism and corrugated tube stagewise supporting mechanism thereof
CN107228749A (en) * 2016-03-25 2017-10-03 哈尔滨飞机工业集团有限责任公司 A kind of axial varied angle mechanism of wind tunnel model small size
CN108020394A (en) * 2017-11-08 2018-05-11 航宇救生装备有限公司 A kind of fuel charger gondola hose drogue device for measuring force
CN109632238A (en) * 2018-12-11 2019-04-16 中国航天空气动力技术研究院 A kind of 90 ° big angle of attack device of Asia transonic and supersonic wind tunnel
CN112362296A (en) * 2021-01-13 2021-02-12 中国空气动力研究与发展中心低速空气动力研究所 Method and device for adjusting roll angle of low-speed wind tunnel tail support model of pitching mechanism

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US7958780B2 (en) * 2008-12-03 2011-06-14 Raytheon Company Wind tunnel testing technique
CN103033336A (en) * 2013-01-14 2013-04-10 中国航空工业集团公司沈阳飞机设计研究所 High speed wind tunnel supporting system
CN203414254U (en) * 2013-07-24 2014-01-29 中国人民解放军空军工程大学 Single-reflow closed-wind tunnel angle-of-attack mechanism
CN103698101A (en) * 2013-12-15 2014-04-02 中国航空工业集团公司哈尔滨空气动力研究所 High-load and high-precision pneumatic force measurement device and measurement method
CN104359648A (en) * 2014-10-17 2015-02-18 北京航天益森风洞工程技术有限公司 Three-DOF (degree of freedom) angle-of-attack mechanism for hypersonic wind tunnel
CN104977148A (en) * 2015-07-30 2015-10-14 四川省工业设备安装公司 Detecting device and detecting method for rotation center of angle-of-attack mechanism of wind tunnel test section
CN205067049U (en) * 2015-10-16 2016-03-02 中国空气动力研究与发展中心低速空气动力研究所 Model angle of attack mechanism

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US7958780B2 (en) * 2008-12-03 2011-06-14 Raytheon Company Wind tunnel testing technique
CN103033336A (en) * 2013-01-14 2013-04-10 中国航空工业集团公司沈阳飞机设计研究所 High speed wind tunnel supporting system
CN203414254U (en) * 2013-07-24 2014-01-29 中国人民解放军空军工程大学 Single-reflow closed-wind tunnel angle-of-attack mechanism
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CN205067049U (en) * 2015-10-16 2016-03-02 中国空气动力研究与发展中心低速空气动力研究所 Model angle of attack mechanism

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107228749B (en) * 2016-03-25 2019-05-14 哈尔滨飞机工业集团有限责任公司 A kind of wind tunnel model small size axial direction varied angle mechanism
CN107228749A (en) * 2016-03-25 2017-10-03 哈尔滨飞机工业集团有限责任公司 A kind of axial varied angle mechanism of wind tunnel model small size
CN106017853A (en) * 2016-06-29 2016-10-12 湖北三江航天红阳机电有限公司 Attack angle adjusting device
CN106153288A (en) * 2016-08-24 2016-11-23 湖北三江航天红阳机电有限公司 A kind of wind tunnel test attack angle mechanism and corrugated tube stagewise supporting mechanism thereof
CN106153288B (en) * 2016-08-24 2018-10-12 湖北三江航天红阳机电有限公司 A kind of wind tunnel test attack angle mechanism and its bellows segmented supporting mechanism
CN108020394A (en) * 2017-11-08 2018-05-11 航宇救生装备有限公司 A kind of fuel charger gondola hose drogue device for measuring force
CN109632238A (en) * 2018-12-11 2019-04-16 中国航天空气动力技术研究院 A kind of 90 ° big angle of attack device of Asia transonic and supersonic wind tunnel
CN112362296A (en) * 2021-01-13 2021-02-12 中国空气动力研究与发展中心低速空气动力研究所 Method and device for adjusting roll angle of low-speed wind tunnel tail support model of pitching mechanism

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Application publication date: 20151216