CN209910944U - Wind tunnel balance force test preparation device - Google Patents
Wind tunnel balance force test preparation device Download PDFInfo
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- CN209910944U CN209910944U CN201920665174.8U CN201920665174U CN209910944U CN 209910944 U CN209910944 U CN 209910944U CN 201920665174 U CN201920665174 U CN 201920665174U CN 209910944 U CN209910944 U CN 209910944U
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 131
- 238000005096 rolling process Methods 0.000 claims abstract description 58
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 4
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- 238000011156 evaluation Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 5
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Abstract
The utility model relates to a wind-tunnel dynamometry technical field specifically discloses a wind-tunnel balance force measurement test preparation facilities. The device comprises a vibration isolation base, an unloading mechanism, a pitching motion mechanism, a rolling motion mechanism and a multi-element loading sleeve, wherein the pitching motion mechanism and the rolling motion mechanism are fixed on the vibration isolation base through a bracket; the axis of the rolling motion mechanism is provided with a multi-element loading sleeve, and a balance attitude measurement component is arranged on the multi-element loading sleeve to measure the pitch angle and the roll angle of the wind tunnel balance; the unloading mechanism is arranged on a ground surface with a hole in the center of the vibration isolation base, the vibration isolation groove is separated from the foundation of the vibration isolation base, and the weight tray at the lower end of the multi-element loading sleeve can be quickly lifted by the unloading mechanism. The device can realize multiple functions of model assembly, model and balance assembly, reference distance measurement, dynamic characteristic detection of the model balance support rod system, wind tunnel balance accuracy evaluation and the like, so that the accuracy, the reliability and the efficiency of wind tunnel balance force measurement test preparation are greatly improved.
Description
Technical Field
The invention belongs to the technical field of wind tunnel force measurement, and particularly relates to a wind tunnel balance force measurement test preparation device.
Background
The preparation work of the wind tunnel balance force test is necessary work before the wind tunnel balance force test, and generally mainly comprises the contents of balance accuracy evaluation, model assembly, sensor installation such as an accelerometer in a model and the like, model balance support rod assembly, reference distance measurement and the like, and also comprises the contents of dynamic characteristic detection of the model balance support rod and the like for the pulse wind tunnel balance force test. The accuracy and the reliability of the wind tunnel balance force test preparation work directly influence the accuracy and the reliability of the wind tunnel balance force test, so the method is extremely important. At present, no device can simultaneously realize the functions of the preparation work of the force measurement test of the wind tunnel balance, the completion of the preparation work of the force measurement test of the wind tunnel balance on different equipment can cause the multiple installation of the wind tunnel balance, so that unnecessary installation repeatability errors are introduced, and the references of different devices are different, so that unnecessary reference errors are introduced. And thirdly, the preparation work of the wind tunnel force test is completed on different equipment, so that repeated disassembly and assembly operations are inevitably introduced, and the preparation efficiency of the wind tunnel force test is reduced.
Disclosure of Invention
The invention aims to provide a wind tunnel balance force test preparation device, which solves the problem of repeatability errors caused by multiple installation of different devices during a wind tunnel balance force test, and greatly improves the accuracy, reliability and efficiency of the wind tunnel balance force test preparation.
The technical scheme of the invention is as follows: a wind tunnel balance force test preparation device comprises a vibration isolation base, an unloading mechanism, a pitching motion mechanism, a rolling motion mechanism and a multi-element loading sleeve, wherein the pitching motion mechanism and the rolling motion mechanism are fixed on the vibration isolation base through a support; the axis of the rolling motion mechanism is provided with a multi-element loading sleeve, and a balance attitude measurement component is arranged on the multi-element loading sleeve to measure the pitch angle and the roll angle of the wind tunnel balance; the unloading mechanism is arranged on a ground surface with a hole in the center of the vibration isolation base, the vibration isolation groove is separated from the foundation of the vibration isolation base, and the weight tray at the lower end of the multi-element loading sleeve can be quickly lifted by the unloading mechanism.
The pitching motion mechanism is of a double-sector structure, and a rolling motion mechanism is arranged between the double-sector structure to form an integral structure; the center end of the fan-shaped structure is fixed on the two supporting arms on the upper end surface of the support through bearings, so that the pitching movement mechanism and the rolling movement mechanism rotate along the central shaft of the fan-shaped structure, and pitching operation is realized.
The arc-shaped end face of the fan-shaped structure is provided with an arc-shaped rack which is meshed and matched with a driving gear arranged on the bracket, the driving gear is connected with a servo motor through a coupler, and the two fan-shaped structures of the pitching motion mechanism are driven to synchronously rotate through the coupler and the driving gear; an encoder inside the servo motor can accurately measure and obtain the motion angle of the pitching motion mechanism.
A worm and gear structure capable of rolling motion is arranged in the rolling motion mechanism along the direction vertical to the rotation axis of the pitching motion mechanism, and is driven by a high-precision servo motor with an encoder and used for measuring the angle of the rolling motion; the back end of the rolling motion mechanism is provided with a rolling locking mechanism which is sleeved on a worm in the rolling motion mechanism, and the symmetrical brake action taking the axis of the worm in the rolling motion mechanism as the reference is realized through a hydraulic mechanism and a spring, so that the rolling motion mechanism is uniformly locked.
The upper end faces of the supports on two sides of the double-fan-shaped structure of the pitching motion mechanism are provided with raised bases A, and the bases A are internally provided with pitching locking mechanisms which can evenly clamp the fan-shaped structure through hydraulic pressure and springs to lock the pitching motion mechanism.
A wind tunnel balance is arranged on the rolling motion mechanism; the multi-element loading sleeve is arranged at the front end of the wind tunnel balance and comprises an inner sleeve and an outer sleeve, the inner sleeve is arranged on the outer sleeve, the inner sleeve moves relative to the outer sleeve in the direction of an X-direction rotating shaft, the outer sleeve is arranged on a frame Y-direction guide rail in the middle of the universal joint structure, and the outer sleeve drives the inner sleeve to move integrally along the Y-direction guide rail in the direction of the Y-direction rotating shaft; the universal joint structure central frame structure is fixedly connected with the outer circular ring structure through an X-direction bearing, so that the inner sleeve and the outer sleeve rotate along an X-direction rotating shaft relative to the outer circular ring; the semicircular structure of the weight tray arranged at the lower end of the multi-element loading sleeve is arranged at two ends of the left horizontal plane and the right horizontal plane of the outer ring through Y-direction bearings, so that the semicircular structure can rotate relative to the outer ring in a Y-direction rotating shaft.
The multi-element loading sleeve is provided with a balance attitude measuring component, wherein the balance attitude measuring component comprises a base and an accelerometer, the base is arranged in the inner sleeve of the multi-element loading sleeve, and the base is provided with a flexible quartz accelerometer.
The lower end of the multi-element loading sleeve is connected with a weight tray through a loading line, the weight tray is placed in the unloading mechanism, and the unloading mechanism can be used for quickly supporting the weight tray, so that the weight load applied to the wind tunnel balance disappears suddenly, and step transient load input is provided for the wind tunnel balance.
The unloading mechanism comprises a bottom plate, an unloading frame, an X-direction screw rod and a Z-direction screw rod, wherein an X-direction guide rail is arranged on the bottom plate along the X direction; the unloading frame is provided with an unloading shell, the upper end surface and the lower end surface of the unloading shell respectively form an unloading surface I and an unloading surface II, the unloading shell is driven to move up and down along a guide rail in the Z direction by a Z-direction screw rod arranged on the unloading frame, and the unloading surface can be quickly supported by the Z-direction screw rod.
The vibration isolation base is also provided with a reference distance measuring mechanism which is arranged on one side of the bracket; the reference distance measuring mechanism comprises a base B, a grating ruler, a screw rod and a guide rail, wherein the base B is of a rectangular shell structure, the upper end surface and the lower end surface of the base B are parallel, the guide rail is arranged on the upper end surface of the base B in parallel, the grating ruler is perpendicular to the guide rail direction and is arranged on the guide rail through a sliding block, and the screw rod arranged in parallel with the guide rail is used for driving the grating ruler to move along the guide rail; when the axis of the wind tunnel balance is in the horizontal plane, the axis of the guide rail in the reference distance measuring mechanism is parallel to the axis of the wind tunnel balance; the grating ruler is provided with a zero reference, and a ruler head at the front end of the grating ruler is matched with a multielement loading sleeve or a wind tunnel test model to realize accurate measurement of a reference distance.
The invention has the following remarkable effects: the wind tunnel balance force test preparation device has the following advantages: 1. by utilizing the preparation device, the assembly of a model, the installation of sensors such as an accelerometer in the model and the assembly of a model balance support rod can be realized; the dynamic characteristic detection of the model balance support rod system under the action of a large weight load of more than 30kg can be realized; the measurement precision of the reference distance in the wind tunnel balance force measurement test can reach 0.01 mm; the method can realize multiple functions of model assembly, model and balance assembly, reference distance measurement, dynamic characteristic detection of a model balance support rod system, wind tunnel balance accuracy evaluation and the like, thereby greatly improving the accuracy, reliability and efficiency of wind tunnel balance force measurement test preparation.
Drawings
FIG. 1 is a schematic structural view of a wind tunnel balance force test preparation device according to the present invention;
FIG. 2 is a schematic structural view of a horizontal attitude motion control and loading part of the wind tunnel in FIG. 1;
FIG. 3 is a schematic view of the loading sleeve of FIG. 1;
FIG. 4 is a schematic view of the unloading mechanism of FIG. 1;
FIG. 5 is a schematic view of the reference distance measurement structure shown in FIG. 1;
in the figure: 1. a vibration isolation base; 2. an unloading mechanism; 3. a pitch locking mechanism; 4. a pitching motion mechanism; 5. A rolling locking mechanism; 6. a rolling motion mechanism; 7. a multi-element loading sleeve; 8. a balance attitude measurement component; 9. A reference distance measuring mechanism; 10. a support; 11. an inner sleeve; 12. a jacket; 13. a wind tunnel balance; 14. a fan-shaped structure; 15. a coupling; 16. an arc-shaped rack; 17. a drive gear; 18. a base A; 19. loading a wire; 20. a weight tray; 21. an X-direction bearing; 22. a Y-direction bearing; 23. an X-direction rotation axis; 24. A Y-direction rotation shaft; 25. the weight load acting direction; 26. a Y-direction guide rail; 27. an X-direction guide rail; 28. A unloading surface I; 29. a screw rod in the X direction; 30. an X-direction guide rail; 31. a unloading surface II; 32. a Z-direction screw rod; 33. a screw rod; 34. a guide rail; 35. a grating scale; 36. and a base B.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, a wind tunnel balance force measurement test preparation device comprises a vibration isolation base 1, an unloading mechanism 2, a pitching movement mechanism 4, a rolling movement mechanism 6, a multi-element loading sleeve 7 and a reference distance measuring mechanism 9, wherein the pitching movement mechanism 4 and the rolling movement mechanism 6 are fixed on the vibration isolation base 1 through a support 10, and a pitching locking mechanism 3 and a rolling locking mechanism 5 are installed on the support 10, so that the pitching movement mechanism 4 and the rolling movement mechanism 6 can be respectively locked and fixed according to needs; the axis of the rolling movement mechanism 6 is provided with a multi-element loading sleeve 8, a balance attitude measurement component 8 is arranged on the multi-element loading sleeve, and the pitching angle and the rolling angle of the wind tunnel balance are measured; the unloading mechanism 2 is arranged on a ground plane with a hole in the center of the vibration isolation base 1 and is separated from the foundation of the vibration isolation base 1 by a vibration isolation ditch; a reference distance measuring mechanism 9 is also arranged on the vibration isolation base 1 on one side of the bracket 10, so that the reference distance can be accurately measured;
as shown in fig. 2, the pitching motion mechanism 4 is a double-sector structure 14, and the rolling motion mechanism 6 is fixedly installed between the double-sector structures 14 to form an integral structure, and the central end of the sector structure 14 is fixed on two supporting arms on the upper end surface of the bracket 10 through a bearing, so that the pitching motion mechanism 4 and the rolling motion mechanism 6 rotate along the central axis of the sector structure 14; the arc end surfaces of the two fan-shaped structures 14 are provided with high-precision arc racks 16 which are meshed and matched with high-precision driving gears 17 arranged on the support 10, the two driving gears 17 are connected with a servo motor through a coupler 15, and the two fan-shaped structures 14 of the pitching motion mechanism 4 are driven to synchronously rotate through the coupler 15 and the driving gears 17; an encoder inside the servo motor can accurately measure and obtain the motion angle of the pitching motion mechanism; the upper end surfaces of the brackets 10 positioned at the two sides of the double-fan-shaped structure 14 of the pitching mechanism 4 are provided with convex bases A18, a pitching locking mechanism 3 is arranged in the base A18, and the pitching locking mechanism 3 can evenly clamp the fan-shaped structure 14 through hydraulic pressure and a spring and can lock the pitching mechanism 4; a worm and gear structure capable of rolling motion is arranged in the rolling motion mechanism 6 along the direction vertical to the rotation axis of the pitching motion mechanism 4, and is driven by a high-precision servo motor with an encoder and measures the angle of the rolling motion; the rear end of the rolling motion mechanism 6 is provided with a rolling locking mechanism 5 which is sleeved on a worm in the rolling motion mechanism 6 and realizes symmetrical brake action by taking the axis of the worm in the rolling motion mechanism 6 as the reference through a hydraulic mechanism and a spring, thereby realizing the uniform locking of the rolling motion mechanism 6; the wind tunnel balance 13 is arranged on the rolling movement mechanism 6, so that the wind tunnel balance 13 can perform pitching and rolling movements under the driving of the pitching movement mechanism 4 and the rolling movement mechanism 6; the front end of the wind tunnel balance 13 is provided with a multi-element loading sleeve 7, wherein the multi-element loading sleeve 7 comprises an inner sleeve 11 and an outer sleeve 12 which can move in a controllable relative manner in the axis X direction and the vertical axis horizontal Y direction of the multi-element loading sleeve 7; the weight tray 20 is installed at the lower extreme of many first loading cover 7 through loading line 19, install balance gesture measurement unit 8 on many first loading cover 7, wherein, balance gesture measurement unit 8 includes base and accelerometer, wherein, the base is installed in the endotheca 11 of many first loading cover 7, and install disturbed quartz accelerometer on the base, guarantee the relative position relation of balance measurement unit and many first loading cover through the base, realize wind-tunnel balance terminal pitch angle and roll measurement of angle through flexible quartz accelerometer, effectively avoid the wind-tunnel balance elasticity angle to the wind-tunnel influence that the evaluation of balance accuracy brought under the weight load effect.
As shown in fig. 3, in the multi-element loading sleeve 7, the inner sleeve 11 is mounted on the outer sleeve 12, so that the inner sleeve 11 moves relative to the outer sleeve 12 in the direction of the X-direction rotating shaft 23, the outer sleeve 12 is mounted on the frame Y-direction guide rail 26 in the middle of the universal joint structure, so that the outer sleeve 12 drives the inner sleeve 11 to move along the Y-direction guide rail 26 in the direction of the Y-direction rotating shaft 24; the central frame structure of the universal joint structure is fixedly connected with the outer ring structure through an X-direction bearing 21, so that the inner sleeve 11 and the outer sleeve 12 rotate relative to the outer ring along an X-direction rotating shaft 23; the semicircular structure of the weight tray 20 arranged at the lower end of the multi-element loading sleeve 7 is arranged at two ends of the left horizontal plane and the right horizontal plane of the outer ring through Y-direction bearings 22, so that the semicircular structure can rotate relative to the outer ring in a Y-direction rotating shaft 24; the intersection point of two rotating shafts of the universal joint is always superposed with the load direction of the weight tray 20, so that the final direction of the weight is always downward along a plumb line, and the relative positions of a weight load action point and the wind tunnel balance 13 are controlled through the relative movement of the inner sleeve and the outer sleeve of the multi-element loading sleeve 7 in the X direction and the Y direction, so that the generation of torque with specified size is realized; when the wind tunnel balance 13 is in a state of a designated pitch angle and a designated roll angle, weights are hung on the weight tray 20, the weight load is decomposed on a body axis of the wind tunnel balance 13 to generate an axial force, a normal force and a lateral force with designated sizes, the relative displacement in the X direction generated by the multi-element loading sleeve inner sleeve 11 and the multi-element loading sleeve outer sleeve 12 is accurately measured by the reference distance measuring mechanism 9, the relative displacement in the Y direction generated by the multi-element loading sleeve inner sleeve 11 and the multi-element loading sleeve outer sleeve 12 is accurately measured by a scale on the multi-element loading sleeve outer sleeve 12, and therefore a pitch moment, a yaw moment and a roll moment with designated sizes are generated on the body axis of the wind tunnel balance 13. The collected voltage output of the wind tunnel balance 13 and the existing calibration formula of the wind tunnel balance 13 are used for calculating the stress condition of the wind tunnel balance 13, and the stress condition is compared with the specified axial force, normal force, lateral force, pitching moment, yawing moment and rolling moment acting on the wind tunnel balance 13, so that the accuracy evaluation of the wind tunnel balance 13 is realized.
As shown in fig. 4, the unloading mechanism 2 includes a base plate on which an X-direction guide rail 30 is mounted in the X direction, an unloading carriage mounted on the X-direction guide rail 30 on the base plate and moving the unloading carriage in the X direction by the X-direction lead screw 29 disposed in parallel with the X-direction guide rail 30, an X-direction lead screw 29, and a Z-direction lead screw 32; the unloading frame is provided with an unloading shell, the upper end face and the lower end face of the unloading frame form an unloading face I28 and an unloading face II31 respectively, the unloading shell is driven by a Z-direction screw rod 32 arranged on the unloading frame to move up and down along a Z-direction guide rail, and the unloading face can be quickly supported by the Z-direction screw rod 32, so that weight loads applied to the wind tunnel balance disappear suddenly, step transient load input is provided for the balance, and dynamic characteristic detection of the wind tunnel balance is realized.
As shown in fig. 5, the reference distance measuring mechanism 9 includes a base B36, a grating ruler 35, a screw rod 33, and a guide rail 34, wherein the base B36 is a rectangular housing structure, the upper end surface and the lower end surface of the base B are parallel, the guide rail 34 is installed on the upper end surface of the base B, the grating ruler 35 is arranged perpendicular to the guide rail 34, and is installed on the guide rail 34 through a slider, and the screw rod 33 arranged parallel to the guide rail 34 is used to drive the grating ruler 35 to move along the guide rail 34; when the axis of the wind tunnel balance is in the horizontal plane, the axis of the guide rail in the reference distance measuring mechanism 9 is parallel to the axis of the wind tunnel balance 13; the grating ruler 35 is provided with a zero reference, and a ruler head at the front end of the grating ruler is matched with the multielement loading sleeve 7 or the wind tunnel test model to realize accurate measurement of the reference distance.
The specific use process of the wind tunnel balance force measurement test preparation device provided by the invention is as follows: (1) the wind tunnel balance 13 is arranged on a mounting seat on the rolling movement mechanism 6, and the multielement loading sleeve 7 is arranged at the front end of the wind tunnel balance 13. Weights with specified weight are hung on the tray 20, the pitching motion mechanism 4 and the rolling motion mechanism 6 are controlled to adjust the attitude of the wind tunnel balance 13 to a specified angle, and the angle is measured by the attitude measurement component 8 of the wind tunnel balance, so that three-component force load with specified size is generated on the wind tunnel balance 13. And moving the multi-element loading sleeve outer sleeve 12 to enable the multi-element loading sleeve outer sleeve 12 and the multi-element loading sleeve 11 to generate relative displacement with a specified size, wherein the displacement is measured by the reference distance measurement measuring mechanism 9, so that three-component moment load with the specified size is generated on the wind tunnel balance 13. If the wind tunnel balance 13 belongs to a strain balance, acquiring voltage output of the wind tunnel balance 13 by a wind tunnel balance matching data acquisition system, and carrying out estimation calculation on the 13-degree of accuracy of the wind tunnel balance; if the wind tunnel balance 13 belongs to the piezoelectric balance, the unloading mechanism 2 quickly holds up the weight, and the wind tunnel balance matching data acquisition system acquires the voltage output of the wind tunnel balance 13 to perform the accuracy evaluation calculation of the wind tunnel balance 13. (2) After the accuracy evaluation of the wind tunnel balance 13 is completed, the multielement loading sleeve 7 is detached from the wind tunnel balance 13, and the test model is installed at the front end of the wind tunnel balance 13. (3) And finishing the assembly work of the model rudder, the upper cover and other parts. (4) And moving the ruler head on the reference distance measuring mechanism 9 to the front end of the model, and reading the ruler head to serve as the reference distance calculation basis of the test model. (5) The weight is mounted on the model, the weight is quickly supported by the unloading mechanism 2, and step dynamic load input is provided for the model balance system arranged on the rolling movement mechanism 6, so that the dynamic characteristic detection of the model balance system is carried out. (6) After the above operations are completed, the wind tunnel balance 13 with the test model mounted therein may be detached from the roll movement mechanism 6 and mounted in the wind tunnel to perform the wind tunnel test.
Claims (10)
1. A wind tunnel balance force measurement test preparation device is characterized in that: the device comprises a vibration isolation base (1), an unloading mechanism (2), a pitching motion mechanism (4), a rolling motion mechanism (6) and a multi-element loading sleeve (7), wherein the pitching motion mechanism (4) and the rolling motion mechanism (6) are fixed on the vibration isolation base (1) through a support (10); a multi-element loading sleeve (7) is arranged on the axis of the rolling movement mechanism (6), and a balance attitude measurement component (8) is arranged on the multi-element loading sleeve to measure the pitch angle and the roll angle of the wind tunnel balance; the unloading mechanism (2) is arranged on a ground surface with a hole in the center of the vibration isolation base (1) and is separated from the foundation of the vibration isolation base (1) by using a vibration isolation groove, and the weight tray at the lower end of the multi-element loading sleeve (7) can be quickly supported by using the unloading mechanism (2).
2. The wind tunnel balance force measurement test preparation device according to claim 1, wherein: the pitching motion mechanism (4) is a double-sector structure (14), and a rolling motion mechanism (6) is arranged between the double-sector structure (14) to form an integral structure; the central end of the fan-shaped structure (14) is fixed on two supporting arms on the upper end surface of the support (10) through a bearing, so that the pitching motion mechanism (4) and the rolling motion mechanism (6) rotate along the central shaft of the fan-shaped structure (14) to realize pitching operation.
3. The wind tunnel balance force measurement test preparation device according to claim 2, wherein: an arc-shaped rack (16) is arranged on the arc end face of the fan-shaped structure (14), and is meshed and matched with a driving gear (17) arranged on the support (10), the driving gear (17) is connected with a servo motor through a coupler (15), and the two fan-shaped structures (14) of the pitching mechanism (4) are driven to synchronously rotate through the coupler (15) and the driving gear (17); an encoder inside the servo motor can accurately measure and obtain the motion angle of the pitching motion mechanism.
4. The wind tunnel balance force measurement test preparation device according to claim 2, wherein: a turbine worm structure capable of rolling motion is arranged in the rolling motion mechanism (6) along the direction vertical to the rotation axis of the pitching motion mechanism (4), and the turbine worm structure is driven by a high-precision servo motor with an encoder and measures the angle of the rolling motion; the rolling mechanism (6) is characterized in that a rolling locking mechanism (5) is arranged at the rear end of the rolling mechanism (6), the rolling locking mechanism (5) is sleeved on a worm in the rolling mechanism (6), and the symmetrical band-type brake action taking the axis of the worm in the rolling mechanism (6) as the reference is realized through a hydraulic mechanism and a spring, so that the rolling mechanism (6) is uniformly locked.
5. The wind tunnel balance force measurement test preparation device according to claim 2, wherein: the pitching mechanism is characterized in that a raised base A (18) is arranged on the upper end faces of the supports (10) on the two sides of the double-sector structure (14) of the pitching mechanism (4), a pitching locking mechanism (3) is arranged in the base A (18), and the pitching locking mechanism realizes uniform clamping of the sector structure (14) and locking of the pitching mechanism (4) through hydraulic pressure and a spring.
6. The wind tunnel balance force measurement test preparation device according to claim 1, wherein: a wind tunnel balance (13) is arranged on the rolling movement mechanism (6); the multi-element loading sleeve (7) is arranged at the front end of the wind tunnel balance (13), wherein the multi-element loading sleeve (7) comprises an inner sleeve (11) and an outer sleeve (12), the inner sleeve (11) is arranged on the outer sleeve (12) to enable the inner sleeve (11) to move relative to the outer sleeve (12) in the direction of an X-direction rotating shaft (23), the outer sleeve (12) is arranged on a frame Y-direction guide rail (26) in the middle of a universal joint structure, and the outer sleeve (12) drives the inner sleeve (11) to integrally move along the Y-direction guide rail (26) in the direction of a Y-direction rotating shaft (24); the central frame structure of the universal joint structure is fixedly connected with the outer ring structure through an X-direction bearing (21), so that the inner sleeve (11) and the outer sleeve (12) rotate along an X-direction rotating shaft (23) relative to the outer ring; the semicircular ring structure of the weight tray (20) arranged at the lower end of the multi-element loading sleeve (7) is arranged at two ends of the left horizontal plane and the right horizontal plane of the outer ring through Y-direction bearings (22), so that the semicircular ring structure can rotate relative to the outer ring in a Y-direction rotating shaft (24).
7. The wind tunnel balance force measurement test preparation device according to claim 6, wherein: the multi-element loading sleeve (7) is provided with a balance attitude measuring component (8), wherein the balance attitude measuring component (8) comprises a base and an accelerometer, wherein the base is arranged in an inner sleeve (11) of the multi-element loading sleeve (7), and a flexible quartz accelerometer is arranged on the base.
8. The wind tunnel balance force measurement test preparation device according to claim 6, wherein: the multi-element loading sleeve (7) is connected with a weight tray (20) through a loading line (19), the weight tray (20) is placed in the unloading mechanism (2), and the unloading mechanism (2) can be used for quickly supporting the weight tray, so that the weight load applied to the wind tunnel balance (13) disappears suddenly, and step transient load input is provided for the wind tunnel balance (13).
9. The wind tunnel balance force measurement test preparation device according to claim 1, wherein: the unloading mechanism (2) comprises a bottom plate, an unloading frame, an X-direction screw rod (29) and a Z-direction screw rod (32), wherein an X-direction guide rail (30) is arranged on the bottom plate along the X direction, the unloading frame is arranged on the X-direction guide rail (30) on the bottom plate, and the unloading frame is driven to move along the X direction by the X-direction screw rod (29) arranged in parallel with the X-direction guide rail (30); the unloading frame is provided with an unloading shell, the upper end surface and the lower end surface of the unloading frame respectively form an unloading surface I (28) and an unloading surface II (31), the unloading shell is driven by a Z-direction screw rod (32) arranged on the unloading frame to move up and down along a Z-direction guide rail, and the unloading surface can be quickly lifted by utilizing the Z-direction screw rod (32).
10. The wind tunnel balance force measurement test preparation device according to claim 1, wherein: the vibration isolation base (1) is also provided with a reference distance measuring mechanism (9), and the reference distance measuring mechanism (9) is arranged on one side of the bracket (10); the reference distance measuring mechanism (9) comprises a base B (36), a grating ruler (35), a screw rod (33) and a guide rail (34), wherein the base B (36) is of a rectangular shell structure, the upper end surface and the lower end surface of the base B are parallel, the guide rail (34) is arranged on the upper end surface of the base B in parallel, the grating ruler (35) and the guide rail (34) are arranged in a direction perpendicular to each other, the grating ruler is arranged on the guide rail (34) through a sliding block, and the screw rod (33) arranged in parallel with the guide rail (34) is used for driving the grating ruler (35) to move along the guide rail (; when the axis of the wind tunnel balance (13) is in the horizontal plane, the axis of the guide rail in the reference distance measuring mechanism (9) is parallel to the axis of the wind tunnel balance (13); the grating ruler (35) is provided with a zero reference, and a ruler head at the front end of the grating ruler is matched with the multielement loading sleeve (7) or the wind tunnel test model to realize the accurate measurement of the reference distance.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110108440A (en) * | 2019-05-10 | 2019-08-09 | 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 wind-tunnel balance attitude-control device |
| CN110108441A (en) * | 2019-05-10 | 2019-08-09 | 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 wind-tunnel balance dynamometer check preparation device |
| CN112362295A (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 | Low-speed wind tunnel tail support model test preparation method and device of pitching mechanism |
| CN112697382A (en) * | 2020-12-22 | 2021-04-23 | 中国空气动力研究与发展中心超高速空气动力研究所 | Vibration isolation method for model mechanism in hypersonic wind tunnel test section |
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2019
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108440A (en) * | 2019-05-10 | 2019-08-09 | 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 wind-tunnel balance attitude-control device |
| CN110108441A (en) * | 2019-05-10 | 2019-08-09 | 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 wind-tunnel balance dynamometer check preparation device |
| CN112697382A (en) * | 2020-12-22 | 2021-04-23 | 中国空气动力研究与发展中心超高速空气动力研究所 | Vibration isolation method for model mechanism in hypersonic wind tunnel test section |
| CN112697382B (en) * | 2020-12-22 | 2022-04-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | Vibration isolation method for model mechanism in hypersonic wind tunnel test section |
| CN112362295A (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 | Low-speed wind tunnel tail support model test preparation method and device of pitching mechanism |
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