CN108398228A - A kind of air-flotation type strain balance - Google Patents
A kind of air-flotation type strain balance Download PDFInfo
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- CN108398228A CN108398228A CN201711445475.1A CN201711445475A CN108398228A CN 108398228 A CN108398228 A CN 108398228A CN 201711445475 A CN201711445475 A CN 201711445475A CN 108398228 A CN108398228 A CN 108398228A
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- component
- axial force
- measuring cell
- mandrel
- force
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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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of air-flotation type strain balances; the balance is combined type balance; including mandrel, axial force component, five component components, protective case; the mandrel includes taper connection section and equal straight sections; the mandrel is installed with the cooperation of axial force component, and axial force component and the cooperation of five component components are installed, and axial force component fixing end is fixed with mandrel; its movable end is fixed with five component component fixing ends, and five component component movable ends are fixed with tested model.The axis, axial force component and five component components are coaxial.Compressed gas is filled with from mandrel fixing end, make to form air-bearing because being full of compressed gas between axial force component movable end and mandrel by the stomata of mandrel front end, the frictional resistance between axial force component and mandrel can be made to ignore, improve the measurement sensitivity and precision of axial force.
Description
Technical field
The present invention relates to a kind of air-flotation type strain balances, belong to aerospace dynamometer check aerodynamics force measurement field, especially
Suitable for it is sub-, across, supersonic speed high-precision drag measurement wind tunnel test.
Background technology
Wind tunnel test is research means crucial in flight shape design for aerocraft, and height is obtained during wind tunnel test
The aerodynamic data of precision must have high-precision aerodynamics force measurement balance, for general aircraft measurement balance, axis
Relative to the power on other directions it is one a small amount of to power (X-component), is an amount for being most difficult to measure in aerodynamics force measurement, to survey
The variation for measuring aircraft shape is even more extremely difficult corresponding to the variable quantity of axial force.Six components of traditional strain balance are at one
On measuring cell, axial force full scale should become smaller when measurement, other pneumatic force components are more than the interference deformation of axial force axial
The principal strain of power component, other components are also big to the interference coefficient of axial force when static calibration of balance, cause balance axial force measuration smart
Degree is difficult to improve.
Invention content
The technology of the present invention solves the problems, such as：A kind of air-flotation type strain balance has been overcome the deficiencies of the prior art and provide, it can
The load of side force, normal force, pitching moment, rolling moment, yawing is set to be directly delivered on mandrel, without to axial force
Load has an impact, and improves signal-to-noise ratio and the sensitivity of axial force measuration, realizes the high-acruracy survey of axial force.
Technical solution of the invention is：A kind of air-flotation type strain balance, the balance include mandrel and for measuring axis
To the axial force component of power, one end of mandrel is sleeved on axial force component internal, and company is fixed in middle part and the end of axial force component
It connects, the other end stretches out outside axial force to be fixedly connected with test bracket, and the mandrel is internally provided with hollow via-hole, and the hollow via-hole
It being blocked positioned at the end of axial force component internal, another end opening, mandrel side wall is connected equipped with multiple stomatas with hollow via-hole,
Compressed gas is filled with along mandrel hollow via-hole, forms suspension between axial force component and mandrel because being full of compressed gas, axial
Power component is for measuring axial force.
The mandrel includes taper connection section and waits straight sections, and straight sections is waited to fix company close to cone section position and axial force component
It connects, taper connection section is connect with test bracket by cone match, and chock is used in combination to tense.
The axial force component measures axial force by axial force measuration element, and the axial force measuration element is mounted on axis
On vertical girder structure on the side wall of power component, plane is perpendicular to the axial force component where axial force measuration element
Axis.
Above-mentioned air-flotation type strain balance further includes for measuring side force, normal force, pitching moment, rolling moment, yaw forces
Five component components of square, axial force assembly set is in five component component internals, and five component assembly sets are inside tested model；Five components
One end of component is fixedly connected with tested model, the end that the other end is fixedly connected with the axial force component of set inside it with mandrel
The opposite other end in portion is fixedly connected, compressed gas after mandrel hollow via-hole is filled with, axial force component and five component components it
Between also form suspension because being full of compressed gas, five component components measure side force, normal force, pitching moment, rolling moment, yaw
The load of axial force is not had an impact when torque.
The mandrel, axial force component and five component component coaxial placements.
The five components component is fixed with tested model by pin；The five components component passes through pin with axial force component
Nail is fixed；The axial force component is fixed with mandrel by pin.
The five components component passes through side force measuring cell, normal force measuring cell, pitching moment measuring cell, rolling power
Square measuring cell and yawing measuring cell measure side force, normal force, pitching moment, rolling moment, yawing, side respectively
Power measuring cell, normal force measuring cell, pitching moment measuring cell, rolling moment measuring cell and yawing measuring cell
On multiple rectangular beams, mounting surface is parallel to five component arrangement axis.
The mounting surface of the pitching moment, normal force and rolling moment measuring cell be located across five component arrangement axis and
In the plane vertical with five component module transverse sections, pitching moment measuring cell, normal force measuring cell and rolling moment measure
Element is 1 pair, and each pair of pitching moment measuring cell, normal force measuring cell and rolling moment measuring cell are both with respect to five points
Measure axisymmetrical arrangement；Yawing element, side force measuring cell are arranged in be measured with pitching moment, normal force and rolling moment
In the perpendicular plane of element, yawing measuring cell, normal force measuring cell are 1 pair, and each pair of yawing measures member
Part, normal force measuring cell are arranged relative to five component axisymmetricals.
The mandrel interior parallel is in axis and avoids the position of stomata and through-hole and is furnished with multiple outlet holes, is used for axial force
Measuring cell, side force measuring cell, normal force measuring cell, pitching moment measuring cell, rolling moment measuring cell and yaw
Torgue measurement element outlet.
Above-mentioned air-flotation type strain balance further includes protective case, and protective case is fixed with five component component fixing ends, covered all
Measuring cell, outer surface are parallel with five component module outer surfaces.
The present invention has the following advantages that compared with prior art：
(1), the present invention is designed strain balance using pneumatically supported principle is formed inside balance unit by compressed gas
At combined type sleeve structure, axial force measuration element is arranged with other power (side force, normal force, pitching power, rolling power, yaw forces)
On two different casings, compressed gas is filled with from mandrel fixing end, the stomata very little of pressure release, ensures axial force component fixing end
Suspension is generated because being full of compressed gas between mandrel, between five component components and axial force component, this structure can make axis
The load for not undertaking the power on other directions in addition to its measurement in wind tunnel test to five component component of power component, can make other four
Load on a component is directly delivered on mandrel, is had an impact without the load to axial force, is improved axial force measuration
The high-acruracy survey of axial force is realized in signal-to-noise ratio and sensitivity.
Description of the drawings
Fig. 1 is a kind of air-flotation type strain balance assembling schematic diagram of the embodiment of the present invention；
Fig. 2 is a kind of air-flotation type strain balance assembling section of the embodiment of the present invention；
Fig. 3 (a) is the structural schematic diagram of mandrel of the embodiment of the present invention；
Fig. 3 (b) is the cross-sectional view of the structure of mandrel of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of axial force component of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of five component component of the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of protective case in the present invention；
In figure：1, mandrel；2, axial force component；3, five component component；4, protective case；5, axial force measuration element；6, it bows
Face upward torgue measurement element；7, normal force measuring cell；8, rolling moment measuring cell；9, yawing measuring cell；10, lateral
Power measuring cell.
Specific implementation mode
Just the present invention is described further in conjunction with attached drawing below.
As shown in Figure 1 and Figure 2, a kind of air-flotation type strain balance provided by the invention be combined type balance, including protective case 4,
Mandrel 1, the five component components 3 for measuring side force, normal force, pitching moment, rolling moment, yawing, for measuring axis
To the axial force component 2 of power, five component components 3 are sleeved on inside tested model, and axial force component 2 is sleeved on inside five component components 3,
One end of mandrel 1 is sleeved on inside axial force component 2, and the other end stretches out outside axial force component 2.One end of five component components 3 with
Tested model is fixedly connected, and the other end is fixedly connected with the axial force component 2 of set inside it with one end, axial force component 2
The other end is fixedly connected with 1 middle part of mandrel, and the end that mandrel 1 stretches out axial force component external is fixedly connected with test bracket, institute
State 3 coaxial placement of mandrel 1, axial force component 2 and five component components.
As shown in Fig. 3 (a) and Fig. 3 (b), the mandrel 1 includes taper connection section and equal straight sections, taper connection section and test
Fixing end is used in combination chock to tense by cone match, and straight sections fixing end is waited to be connected with axial force component 2 by pin；The core
Axis 1 is internally provided with hollow via-hole, and the hollow via-hole is located at the end of axial force component internal and is blocked with jackscrew, and the other end is opened
Mouthful, 1 side wall of mandrel is connected equipped with multiple stomatas with hollow via-hole, and compressed gas is passed through from taper connection segment trailer, is passed through
The stomata of straight section front end is fed gas into inside whole device, between axial force component and mandrel 1 and axial force component and five points
Suspension is formed because being full of compressed gas between amount component 3.Above-mentioned air-bearing structure can make axial force component and mandrel it
Between frictional resistance ignore, five component components 3 measure side force, normal force, pitching moment, rolling moment, yawing when
The load of axial force is not had an impact, for general strain balance, the load on other four components can be made direct
It is transmitted on mandrel, is had an impact without the load to axial force, improve signal-to-noise ratio and the sensitivity of axial force measuration, realize
The high-acruracy survey of axial force.
In addition, 1 interior parallel of the mandrel is in axis and avoids the position of stomata and through-hole and is furnished with multiple outlet holes, it is used for
Axial force measuration element, side force measuring cell, normal force measuring cell, pitching moment measuring cell, rolling moment measuring cell
With yawing measuring cell outlet.
The axial force component 2 measures axial force by axial force measuration element.Fig. 4 is the structural representation of axial force component
Figure, as shown in figure 4, the axial force component 2 is hollow cylindrical, the axial force measuration element 5 is mounted on axial force component
Side wall on vertical girder structure on, plane where axial force measuration element is led to perpendicular to the axis of the axial force component 2
It crosses parallelogram sturcutre power transmission and measures axial force.
The five components component 3 is fixed with tested model by pin；The five components component 3 is logical with axial force component 2
Pin is crossed to fix；The axial force component 2 is fixed with mandrel 1 by pin.
The five components component 3 passes through side force measuring cell, normal force measuring cell, pitching moment measuring cell, rolling
Torgue measurement element and yawing measuring cell measure side force, normal force, pitching moment, rolling moment, yawing respectively,
Side force measuring cell, normal force measuring cell, pitching moment measuring cell, rolling moment measuring cell and yawing measure member
Part is mounted on multiple rectangular beams, and mounting surface is parallel to five component components, 3 axis.
The mounting surface of the pitching moment, normal force and rolling moment measuring cell be located across five component arrangement axis and
In the plane vertical with five component module transverse sections, pitching moment measuring cell, normal force measuring cell and rolling moment measure
Element is 1 pair, and each pair of pitching moment measuring cell, normal force measuring cell and rolling moment measuring cell are both with respect to five points
Measure axisymmetrical arrangement；Yawing, normal force measuring cell are arranged in measures member with pitching moment, normal force and rolling moment
In the perpendicular plane of part, yawing measuring cell, normal force measuring cell are 1 pair, each pair of yawing measuring cell,
Normal force measuring cell is arranged relative to five component axisymmetricals.
Fig. 5 is the structural schematic diagram of five component components.As shown in figure 5, the five components component 3 is hollow cylindrical, side
Power measuring cell, normal force measuring cell, pitching moment measuring cell, rolling moment measuring cell and yawing measuring cell
Along the directional spreding parallel with five component axis on five component components, 3 side wall.About the 3 five components component is respectively furnished with monolithic
Rectangular beam, single, rectangular piece beam section broadside extended line is vertical with by five component arrangement axis, broadside and five component arrangement axis
Vertically, plane where single, rectangular piece deck-siding side places pitching moment measuring cell 6, normal force measuring cell 7 for measuring pitching
Torque, normal force, plane where narrow side places rolling dress torgue measurement element 8, for measuring rolling moment.Left and right is furnished with three-chip type
Rectangular beam places yawing 9 and side force measuring cell 10, for measuring yaw forces on the outside of five component component of intermediate beam upper edge
Square and side force.
Protective case 4 is fixed with five component components, 3 fixing end, covers all side force elements, outer surface and five component components 3
Outer surface is parallel.Fig. 6 is protective case structural schematic diagram, and the protective case is fastened with five component components 3 with screw, is surveyed for protecting
Measure element.
Operation principle：The air-flotation type high-precision axial force strain balance mandrel 1, axial force component 2, five component components 3,
4 coaxial cooperation of protective case is installed, and 1 fixing end of mandrel is fixed on test bracket, and five component component movable ends are solid with tested model
Even, the aerodynamic force that model tested in this way is born passes to five component components 3, and aerodynamic force is passed to axial direction by five component components 3 again
Aerodynamic force is transmitted on holder by power component 2, axial force component 2 by being fixed with mandrel 1；By to 1 fixing end of mandrel is filled
Enter compressed gas, can make to be formed because being full of compressed gas between mandrel 1, axial force component 2, five component components 3, tested model
It suspends, does not generate and influence each other, under this assembling structure, a whole set of balance can be realized to acting on the aerodynamic load on model
The accurate measurement of 6 components, especially can have higher measurement accuracy to axial force.
The measuring cell of axial force component 2 is axial force measuration element 5, and on 2 side wall of axial force component, structure is using vertical
Beam type measures axial force by parallelogram sturcutre power transmission；The measuring cell of five component components 3 includes pitching moment 6, normal direction
Power 7,10 measuring cell of rolling moment 8, yawing 9 and side force, are respectively positioned on five component components, 3 side wall, wherein pitching moment
6, normal force 7 and 8 measuring cell of rolling moment are two groups of single, rectangular piece beams, arrangement symmetrical above and below；Yawing 9 and side force 10 are
Two groups of three-chip type rectangular beams, are symmetrically arranged.Strain size by measuring six different measuring cells, which measures, is tested model
Power on suffered six direction and torque.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (10)
1. a kind of air-flotation type strain balance, it is characterised in that：Axial force component including mandrel (1) and for measuring axial force
(2), one end of mandrel (1) is sleeved on axial force component (2) inside, and middle part is fixedly connected with the end of axial force component (2), separately
One end is stretched out outside axial force to be fixedly connected with test bracket, and the mandrel (1) is internally provided with hollow via-hole, and the hollow via-hole position
It is blocked in the end of axial force component internal, another end opening, mandrel (1) side wall is equipped with multiple stomatas and hollow via-hole phase
Even, compressed gas is filled with along mandrel (1) hollow via-hole, is formed between axial force component and mandrel (1) because being full of compressed gas
It suspends, axial force component is for measuring axial force.
2. a kind of air-flotation type strain balance according to claim 1, it is characterised in that：The mandrel (1) includes that taper connects
It connects section and waits straight sections, wait straight sections to be fixedly connected with axial force component (2) close to cone section position, taper connection section is logical with test bracket
Cone match connection is crossed, chock is used in combination to tense.
3. a kind of air-flotation type strain balance according to claim 1, it is characterised in that：The axial force component (2) passes through
Axial force measuration element measures axial force, and the axial force measuration element is mounted on the vertical beam type on the side wall of axial force component
In structure, axis of the plane perpendicular to the axial force component (2) where axial force measuration element.
4. a kind of air-flotation type strain balance according to claim 1, it is characterised in that：Further include for measuring side force, normal direction
Five component components (3) of power, pitching moment, rolling moment, yawing, axial force component (2) are sleeved in five component components (3)
Portion, five component components (3) are sleeved on inside tested model；One end of five component components (3) is fixedly connected with tested model, the other end
The other end opposite with the end that the axial force component (2) of set inside it is fixedly connected with mandrel (1) is fixedly connected, compressed gas
Body is after mandrel (1) hollow via-hole is filled with, between axial force component (2) and five component components (3) also due to being full of compressed gas
It is formed and is suspended, not to axial force when five component components (3) measure side force, normal force, pitching moment, rolling moment, yawing
Load have an impact.
5. a kind of air-flotation type strain balance according to claim 4, it is characterised in that：The mandrel (1), axial force component
(2) and five component component (3) coaxial placements.
6. a kind of air-flotation type strain balance according to claim 4, it is characterised in that：The five components component (3) and quilt
Model is surveyed to fix by pin；The five components component (3) is fixed with axial force component (2) by pin；The axial force group
Part (2) is fixed with mandrel (1) by pin.
7. a kind of air-flotation type strain balance according to claim 4, it is characterised in that：The five components component (3) passes through
Side force measuring cell, normal force measuring cell, pitching moment measuring cell, rolling moment measuring cell and yawing measure member
Part measures side force, normal force, pitching moment, rolling moment, yawing respectively, side force measuring cell, normal force measuring cell,
Pitching moment measuring cell, rolling moment measuring cell and yawing measuring cell are mounted on multiple rectangular beams, mounting surface
It is parallel to five component component (3) axis.
8. a kind of air-flotation type strain balance according to claim 7, it is characterised in that：The pitching moment, normal force and
The mounting surface of rolling moment measuring cell is located across five component arrangement axis and the plane vertical with five component module transverse sections
On, pitching moment measuring cell, normal force measuring cell and rolling moment measuring cell are 1 pair, and each pair of pitching moment measures
Element, normal force measuring cell and rolling moment measuring cell are arranged both with respect to five component axisymmetricals；Yawing element,
Side force measuring cell is arranged in the plane perpendicular with pitching moment, normal force and rolling moment measuring cell, yawing
Measuring cell, normal force measuring cell are 1 pair, each pair of yawing measuring cell, normal force measuring cell, relative to five points
Measure axisymmetrical arrangement.
9. a kind of air-flotation type strain balance according to claim 7, it is characterised in that：Mandrel (1) interior parallel in
The axis and position for avoiding stomata and through-hole is furnished with multiple outlet holes, for axial force measuration element, side force measuring cell, normal direction
Power measuring cell, pitching moment measuring cell, rolling moment measuring cell and yawing measuring cell outlet.
10. according to a kind of air-flotation type strain balance of claim 1~9 any one of them, it is characterised in that：It further include protective case
(4), protective case (4) is fixed with five component component (3) fixing ends, covers all measuring cells, outer surface and five component components
(3) outer surface is parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445475.1A CN108398228B (en) | 2017-12-27 | 2017-12-27 | Air-floating strain balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445475.1A CN108398228B (en) | 2017-12-27 | 2017-12-27 | Air-floating strain balance |
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| Publication Number | Publication Date |
|---|---|
| CN108398228A true CN108398228A (en) | 2018-08-14 |
| CN108398228B CN108398228B (en) | 2020-03-24 |
Family
ID=63093695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711445475.1A Active CN108398228B (en) | 2017-12-27 | 2017-12-27 | Air-floating strain balance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110132526A (en) * | 2019-05-29 | 2019-08-16 | 中国科学院力学研究所 | A kind of low disturbing pulse type shock tunnel strain type face frictional resistance balance |
| CN110207944A (en) * | 2019-06-26 | 2019-09-06 | 中国航天空气动力技术研究院 | A kind of wind tunnel experiment high-precision resistance measurement method and device |
| CN110333120A (en) * | 2019-07-24 | 2019-10-15 | 合肥工业大学 | A kind of machine components cleannes rapid detection method and device |
| CN112461494A (en) * | 2020-11-09 | 2021-03-09 | 中国空气动力研究与发展中心 | Pulse combustion wind tunnel model support-balance integrated force measuring device |
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| CN205748868U (en) * | 2016-05-11 | 2016-11-30 | 中国空气动力研究与发展中心超高速空气动力研究所 | The little asymmetric reentry body aerodynamics force measurement device that a kind of air-bearing supports |
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| JP2011252830A (en) * | 2010-06-03 | 2011-12-15 | Toshiba Corp | Support equipment for wind tunnel test model |
| CN102062630A (en) * | 2010-12-06 | 2011-05-18 | 中国航天空气动力技术研究院 | Floating frame type axial force strain balance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110132526A (en) * | 2019-05-29 | 2019-08-16 | 中国科学院力学研究所 | A kind of low disturbing pulse type shock tunnel strain type face frictional resistance balance |
| CN110207944A (en) * | 2019-06-26 | 2019-09-06 | 中国航天空气动力技术研究院 | A kind of wind tunnel experiment high-precision resistance measurement method and device |
| CN110207944B (en) * | 2019-06-26 | 2021-04-13 | 中国航天空气动力技术研究院 | High-precision resistance measuring method and device for wind tunnel experiment |
| CN110333120A (en) * | 2019-07-24 | 2019-10-15 | 合肥工业大学 | A kind of machine components cleannes rapid detection method and device |
| CN112461494A (en) * | 2020-11-09 | 2021-03-09 | 中国空气动力研究与发展中心 | Pulse combustion wind tunnel model support-balance integrated force measuring device |
| CN112461494B (en) * | 2020-11-09 | 2022-09-02 | 中国空气动力研究与发展中心 | Pulse combustion wind tunnel model support-balance integrated force measuring device |
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| CN108398228B (en) | 2020-03-24 |
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