CN205067049U - Model angle of attack mechanism - Google Patents
Model angle of attack mechanism Download PDFInfo
- Publication number
- CN205067049U CN205067049U CN201520798208.2U CN201520798208U CN205067049U CN 205067049 U CN205067049 U CN 205067049U CN 201520798208 U CN201520798208 U CN 201520798208U CN 205067049 U CN205067049 U CN 205067049U
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- Prior art keywords
- arc
- guide rail
- angle
- gear
- sting
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Abstract
The utility model discloses a model angle of attack mechanism, including undersetting and the upper bracket of setting on the undersetting, be provided with two arc guide rails on the same perpendicular of upper bracket side by side, be provided with arc rack between two arc guide rails, thereby coupling mechanism drives the angle of attack was realized to the detected model at the wind -tunnel internal rotation continuous variation along arc rail movements under actuating mechanism's effect. Adopt the utility model discloses a structure can realize when the wind tunnel test that whole supporting mechanism main part need not set up in the wind tunnel test district, only needs to be surveyed in model, tail branch and some preflex branches stay the wind tunnel test district, reduces the supporting mechanism and to the influence in wind -tunnel flow field, improves experimental precision, and strutting arrangement and wind -tunnel wall contactless reduce the influence of strutting arrangement to the wind -tunnel flow field.
Description
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 (5)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798208.2U CN205067049U (en) | 2015-10-16 | 2015-10-16 | Model angle of attack mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798208.2U CN205067049U (en) | 2015-10-16 | 2015-10-16 | Model angle of attack mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205067049U true CN205067049U (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520798208.2U Expired - Fee Related CN205067049U (en) | 2015-10-16 | 2015-10-16 | Model angle of attack mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205067049U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157949A (en) * | 2015-10-16 | 2015-12-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Model attack angle mechanism |
| CN105806585A (en) * | 2016-05-11 | 2016-07-27 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed wind tunnel large attack angle pitching dynamic stalling test device |
| CN107060768A (en) * | 2017-05-25 | 2017-08-18 | 兖州煤业股份有限公司 | Double-deck multipurpose mortar depositing construction platform in pit shaft |
-
2015
- 2015-10-16 CN CN201520798208.2U patent/CN205067049U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157949A (en) * | 2015-10-16 | 2015-12-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Model attack angle mechanism |
| CN105806585A (en) * | 2016-05-11 | 2016-07-27 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed wind tunnel large attack angle pitching dynamic stalling test device |
| CN107060768A (en) * | 2017-05-25 | 2017-08-18 | 兖州煤业股份有限公司 | Double-deck multipurpose mortar depositing construction platform in pit shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20181016 |