CN201697775U - Wind tunnel model air float fore-measuring device - Google Patents
Wind tunnel model air float fore-measuring device Download PDFInfo
- Publication number
- CN201697775U CN201697775U CN2010202080224U CN201020208022U CN201697775U CN 201697775 U CN201697775 U CN 201697775U CN 2010202080224 U CN2010202080224 U CN 2010202080224U CN 201020208022 U CN201020208022 U CN 201020208022U CN 201697775 U CN201697775 U CN 201697775U
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- model
- air
- wind tunnel
- force
- guide rail
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Abstract
The utility model discloses a wind tunnel model air float for-measuring device, mainly relating to a device for measuring the force of a wind tunnel experiment model by air float support. For solving the problems that the existing force-measuring technology and the conventional force-measuring element have both greater pneumatic lifting force and lower pneumatic resistance and realize high-precision measuring of the resistance, the technical proposal is composed of a multicomponent force-measuring balance, a model supporting rod, a cowl, a slotted sunk screw, a precision air float guide way, a hexagonal socket head screw, a sensor fixed seat, a force-measuring interference removing rod, a high-precision axial tension and compression sensor, a sensor connecting rod, a precision air float guide way fixed seat, a hexagonal socket head set screw, a hexagonal socket stop screw, a bidirectional clamp nut, a model angle varying system and an air feed pump. The wind tunnel model is floated, the air float force-measuring experiment with change of the attack angle and sideslip angle is realized, and static and dynamic high-precision measurements are completed when greater ratio is existed between the lifting force and the resistance and greater interference is acted on the resistance measurement by the lifting force.
Description
One, technical field
The utility model relates to air flotation force measuring device of wind tunnel model, mainly is to adopt the device of air supporting support to the model in wind tunnel dynamometry.
Two, background technology
Dynamometry is a pilot project the most basic in the wind tunnel test.Conventional load-sensing unit is a strain rod-type balance, and load-sensing unit is connected with wind tunnel model with after pole is connected again, is out of shape by the load-sensing unit generation and directly wind tunnel model is measured.The load-sensing unit strain is directly proportional with the external force size.At present, the technology and the material behavior of existing load-sensing unit itself, has bigger aerodynamic force lift for both requiring, require to have less aerodynamic force resistance again, when requiring again that simultaneously resistance carried out high-acruracy survey, it is bigger that traditional force measuring method implements difficulty, and precision does not satisfy requirement.At this moment need us to explore new dynamometry technology.
Three, summary of the invention
For solve existing dynamometry technology, conventional load-sensing unit can not satisfy the problem that " both having required to have bigger aerodynamic force lift; require to have less aerodynamic force resistance again; require again resistance is carried out high-acruracy survey simultaneously " requires, when wind tunnel model lift and resistance ratio are big, realize high precision, the high-sensitivity measurement of resistance, the utility model provides a kind of device for measuring force that adopts air supporting to support, realize wind tunnel model lift with resistance ratio the high-acruracy survey of resistance greatly the time.The technical solution of the utility model is as follows:
Air flotation force measuring device of wind tunnel model, by many component force balances, model pole, radome fairing, slotted countersunk flat head screw, accurate air-float guide rail, socket head cap screw, the sensor holder, dynamometry disappears and disturbs bar, high precision axial push-pull sensor, the sensor connecting link, accurate air-float guide rail holder, allen screw, interior hexagonal backing-up screw, two-way clamp nut, model varied angle system, air feed pump is formed, accurate air-float guide rail is installed in the model varied angle system, accurate air-float guide rail one end installation dynamometry disappears and disturbs bar, dynamometry disappears and disturbs bar and be connected with high precision axial push-pull sensor, the accurate air-float guide rail other end is installed model pole, many component force balances are installed on the model pole, wind tunnel model is connected with many component force balances, and the balance calibration center of many component force balances is placed on the high precision axial push-pull sensor.
Air flotation force measuring device of wind tunnel model, accurate air-float guide rail is connected with model varied angle system screw.
The utility model air flotation force measuring device of wind tunnel model provides clean compressed air by the air flotation force measuring device air feed pump to accurate air-float guide rail, and when accurate air-float guide rail was ventilated, the accurate air-float guide rail that is installed in the model varied angle system was floated; Simultaneously, the dynamometry that is connected with accurate air-float guide rail disappears and disturbs bar, model pole also along with being floated; Disappear with dynamometry and to disturb high precision axial push-pull sensor that bar is connected, be installed in many component force balances on the model pole, be installed in the wind tunnel model of many component force balances, also along with being floated.
The utility model air flotation force measuring device of wind tunnel model, by accurate air-float guide rail being packed in the model varied angle system, can be-4 °～+ 30 °, be ± 30 ° at angle of attack α, realize static and dynamic wind tunnel model is carried out high-precision measurement at yaw angle β.Realized that, lift big at lift and resistance ratio when big, provides accurate measurement, particularly high-acruracy survey to the interference of drag measurement.
The utility model air flotation force measuring device of wind tunnel model floats carrier and carries out many components aerodynamic force and measure, and makes every effort to form the rigidity air film, with support load.The air film rigidity that is equipped with accurate air-float guide rail equipment generation is strong, and the test range of application is comparatively extensive.General gas friction damping force is less, and the order of magnitude is about 10
-4N utilizes this superiority to adopt accurate air-float guide rail device that wind tunnel model and pole are floated, realize wind tunnel model lift with resistance ratio greatly the time to the high-acruracy survey of resistance.
Four, description of drawings
Fig. 1 is the structural representation of air flotation force measuring device of wind tunnel model, and Fig. 2 is the structural representation that accurate air-float guide rail is connected with model varied angle system.
Wherein, the 1st, many component force balances, the 2nd, model pole, the 3rd, radome fairing, the 4th, slotted countersunk flat head screw, the 5th, accurate air-float guide rail, the 6th, socket head cap screw, the 7th, the sensor holder, the 8th, dynamometry disappears and disturbs bar, the 9th, high precision axial push-pull sensor, the 10th, the sensor connecting link, the 11st, accurate air-float guide rail holder, the 12nd, allen screw, the 13rd, interior hexagonal backing-up screw, the 14th, two-way clamp nut, the 15th, the wind-tunnel balance calibration center, the 16th, safety-valve, the 17th, air purifier, the 18th, freezing type drier, the 19th, air flotation force measuring device air feed pump, the 20th, wind tunnel model varied angle system.
Five, embodiment
In conjunction with the accompanying drawings 1, accompanying drawing 2 provides embodiment, the description by present embodiment is described further the technical solution of the utility model.
Air flotation force measuring device of wind tunnel model, by many component force balances [1], model pole [2], radome fairing [3], slotted countersunk flat head screw [4], accurate air-float guide rail [5], socket head cap screw [6], sensor holder [7], dynamometry disappears and disturbs bar [8], high precision axial push-pull sensor [9], sensor connecting link [10], accurate air-float guide rail holder [11], allen screw [12], interior hexagonal backing-up screw [13], two-way clamp nut [14], model varied angle system [20], air feed pump [19] is formed, accurate air-float guide rail [5] is installed in the model varied angle system [20], accurate air-float guide rail [5] one ends installation dynamometry disappears and disturbs bar [8], dynamometry disappears and disturbs bar [8] and be connected with high precision axial push-pull sensor [9], accurate air-float guide rail [5] other end is installed model pole [2], many component force balances [1] are installed on the model pole [2], wind tunnel model is connected with many component force balances [1], and the balance calibration center [15] of many component force balances [1] is placed on the high precision axial push-pull sensor [9].
Air flotation force measuring device of wind tunnel model, accurate air-float guide rail [5] is connected with model varied angle system [20] screw.
Present embodiment is connected with accurate air-float guide rail [5] after adopting five-component force balance [1] to be connected with model pole [2].High precision axial push-pull sensor [9] and dynamometry disappear to disturb and are connected with sensor holder [7] after bar [8] and sensor connecting link [10] are connected one.
Provide clean compressed air by air flotation force measuring device of wind tunnel model air feed pump [19] to accurate air-float guide rail [5].When accurate air-float guide rail [5] is ventilated, accurate air-float guide rail [5] is floated with model pole [2] and five-component force balance [1] simultaneously.During test, only the axial force of wind tunnel model is passed to high precision axial push-pull sensor [9] by accurate air-float guide rail [5], other 5 unit power are cancelled.The supply gas pressure of regulating air flotation force measuring device of wind tunnel model air feed pump [19] floats wind tunnel model to 0.7Mpa.Under different drag measurement load, the suitable high precision axial push-pull sensor [9] of conversion makes the drag measurement precision higher as required.During test, wind tunnel model is installed on the five-component force balance [1], is connected with air flotation force measuring device of wind tunnel model and realizes the measurement of six component aerodynamic force.
High precision axial push-pull sensor [9] can be measured maximum lift load 50KG, drag measurement load range 0-100KG (can according to the different conversion of when test load);
Air flotation force measuring device of wind tunnel model can realize that wind tunnel model angle of attack α transformation range is-4 °～+ 30 °, and yaw angle β transformation range is ± 30 °.
When carrying out the measurement of many components aerodynamic force, make every effort to make them under the effect of aerodynamic load, desire is separately measured the load sensitivity of component, produce responsive relatively distortion, and it is insensitive to the load of other component, do not produce or produce the little distortion of trying one's best, the machinery to power and moment on the implementation structure decomposes or partly decomposes.Utilize pressurized air to flow through accurate air-float guide rail [5], carrier is floated this new technique, form the rigidity air film, with support load.Be equipped with accurate air machinery, the air film rigidity of generation is strong, and range of application is comparatively extensive.General gas friction damping force is less, and the order of magnitude is about 10
-4N utilizes this superiority to adopt air-floating apparatus that wind tunnel model and pole are floated, realize wind tunnel model lift with resistance ratio greatly the time to the high-acruracy survey of resistance.
Accurate air-float guide rail [5] is installed on the accurate air-float guide rail holder [11] with socket head cap screw [6], radome fairing [3] is installed on the accurate air-float guide rail [5] with slotted countersunk flat head screw [4], and sensor holder [7] is installed on the accurate air-float guide rail [5] with socket head cap screw [6].Five-component force balance [1] is connected the back and is connected with accurate air-float guide rail [5] with model pole [2].High precision axial push-pull sensor [9] and dynamometry disappear to disturb and are connected with sensor holder [7] after bar [8] and sensor connecting link [10] are connected one.Be installed in after above-mentioned part fuses in the wind tunnel model varied angle system [20], provide clean compressed air by air flotation force measuring device air feed pump [19].
Claims (2)
1. air flotation force measuring device of wind tunnel model, by many component force balances [1], model pole [2], radome fairing [3], slotted countersunk flat head screw [4], accurate air-float guide rail [5], socket head cap screw [6], sensor holder [7], dynamometry disappears and disturbs bar [8], high precision axial push-pull sensor [9], sensor connecting link [10], accurate air-float guide rail holder [11], allen screw [12], interior hexagonal backing-up screw [13], two-way clamp nut [14], model varied angle system [20], air feed pump [19] is formed, it is characterized in that: accurate air-float guide rail [5] is installed in the model varied angle system [20], accurate air-float guide rail [5] one ends installation dynamometry disappears and disturbs bar [8], dynamometry disappears and disturbs bar [8] and be connected with high precision axial push-pull sensor [9], accurate air-float guide rail [5] other end is installed model pole [2], many component force balances [1] are installed on the model pole [2], wind tunnel model is connected with many component force balances [1], and the balance calibration center [15] of many component force balances [1] is placed on the high precision axial push-pull sensor [9].
2. according to claim 1 air flotation force measuring device of wind tunnel model, it is characterized in that: accurate air-float guide rail [5] is connected with model varied angle system [20] screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202080224U CN201697775U (en) | 2010-05-31 | 2010-05-31 | Wind tunnel model air float fore-measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202080224U CN201697775U (en) | 2010-05-31 | 2010-05-31 | Wind tunnel model air float fore-measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201697775U true CN201697775U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202080224U Expired - Lifetime CN201697775U (en) | 2010-05-31 | 2010-05-31 | Wind tunnel model air float fore-measuring device |
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| CN (1) | CN201697775U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832851A (en) * | 2010-05-31 | 2010-09-15 | 中国航空工业空气动力研究院 | Air flotation force measuring device of wind tunnel model |
| CN102435413A (en) * | 2011-09-21 | 2012-05-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for ascertaining correspondence relationship of pressure measuring points of wind tunnel test model |
| CN114646451A (en) * | 2022-03-18 | 2022-06-21 | 中国空气动力研究与发展中心高速空气动力研究所 | Balance with double fixed supporting parts |
-
2010
- 2010-05-31 CN CN2010202080224U patent/CN201697775U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832851A (en) * | 2010-05-31 | 2010-09-15 | 中国航空工业空气动力研究院 | Air flotation force measuring device of wind tunnel model |
| CN101832851B (en) * | 2010-05-31 | 2012-05-30 | 中国航空工业空气动力研究院 | Air flotation force measuring device of wind tunnel model |
| CN102435413A (en) * | 2011-09-21 | 2012-05-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for ascertaining correspondence relationship of pressure measuring points of wind tunnel test model |
| CN102435413B (en) * | 2011-09-21 | 2013-11-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for ascertaining correspondence relationship of pressure measuring points of wind tunnel test model |
| CN114646451A (en) * | 2022-03-18 | 2022-06-21 | 中国空气动力研究与发展中心高速空气动力研究所 | Balance with double fixed supporting parts |
| CN114646451B (en) * | 2022-03-18 | 2023-04-07 | 中国空气动力研究与发展中心高速空气动力研究所 | Balance with double fixed supporting parts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110105 Effective date of abandoning: 20120530 |