CN110108441B - Wind tunnel balance force test preparation device - Google Patents
Wind tunnel balance force test preparation device Download PDFInfo
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- CN110108441B CN110108441B CN201910387943.7A CN201910387943A CN110108441B CN 110108441 B CN110108441 B CN 110108441B CN 201910387943 A CN201910387943 A CN 201910387943A CN 110108441 B CN110108441 B CN 110108441B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 123
- 230000033001 locomotion Effects 0.000 claims abstract description 76
- 238000005096 rolling process Methods 0.000 claims abstract description 57
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000011156 evaluation Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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
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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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- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention relates to the technical field of wind tunnel force measurement, and particularly discloses a wind tunnel balance force measurement test preparation device. 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 gesture measuring component is arranged on the multi-element loading sleeve for measuring the pitching angle and the rolling 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, and is separated from the foundation of the vibration isolation base by utilizing the vibration isolation groove, and the weight tray at the lower end of the multi-element loading sleeve can be quickly lifted by utilizing the unloading mechanism. The device can realize various functions such as 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, so that the accuracy, reliability and efficiency of wind tunnel balance force 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 level accuracy evaluation, model assembly, sensor installation such as an accelerometer in a model, model balance support rod assembly, reference distance measurement and the like, and for the pulse wind tunnel balance force test, the preparation work also comprises the contents of dynamic characteristic detection of the model balance support rod and the like. The accuracy and the reliability of the preparation work of the wind tunnel balance force test directly influence the accuracy and the reliability of the wind tunnel balance force test, so that the wind tunnel balance force test is extremely important. At present, no device can simultaneously realize the functions of all the preparation work of the wind tunnel balance force test, and the completion of the preparation work of the wind tunnel force test on different equipment can lead to multiple installation of the wind tunnel balance, thereby introducing unnecessary installation repeatability errors, and different device references are different, thereby introducing unnecessary reference errors. And thirdly, repeated dismounting operation is inevitably introduced when wind tunnel force test preparation work is completed on different equipment, so that the wind tunnel force test preparation efficiency is reduced.
Disclosure of Invention
The invention aims to provide a preparation device for a wind tunnel balance force test, which solves the problem of repeatability errors caused by multiple installation of different devices during the wind tunnel balance force test and greatly improves the precision, reliability and efficiency of the preparation of the wind tunnel balance force test.
The technical scheme of the invention is as follows: the wind tunnel balance force measurement 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 bracket; the axis of the rolling motion mechanism is provided with a multi-element loading sleeve, and a balance gesture measuring component is arranged on the multi-element loading sleeve for measuring the pitching angle and the rolling 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, and is separated from the foundation of the vibration isolation base by utilizing the vibration isolation groove, and the weight tray at the lower end of the multi-element loading sleeve can be quickly lifted by utilizing the unloading mechanism.
The pitching motion mechanism is of a double-fan-shaped structure, and a rolling motion mechanism is arranged between the double-fan-shaped structures to form an integral structure; the center end of the fan-shaped structure is fixed on two supporting arms on the upper end face of the bracket through a bearing, so that the pitching motion mechanism and the rolling motion mechanism rotate along the central axis of the fan-shaped structure, and pitching operation is realized.
The arc end face of the fan-shaped structure is provided with an arc 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; the encoder in the servo motor can accurately measure and obtain the movement angle of the pitching movement mechanism.
The rolling motion mechanism is provided with a worm and gear structure capable of rolling motion along the direction vertical to the rotation axis of the pitching motion mechanism, and the worm and gear structure 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 is provided with a rolling locking mechanism, the rolling locking mechanism is sleeved on a worm in the rolling motion mechanism, and symmetrical band-type brake action taking the axis of the worm in the rolling motion mechanism as a reference is realized through a hydraulic mechanism and a spring, so that uniform locking of the rolling motion mechanism is realized.
The upper end faces of the brackets on two sides of the double fan-shaped structure of the pitching mechanism are provided with raised bases A, and pitching locking mechanisms are arranged in the bases A and are used for uniformly clamping the fan-shaped structure through hydraulic pressure and springs so as to lock the pitching mechanism.
The 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, wherein the inner sleeve is arranged on the outer sleeve, so that 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 Y-direction guide rail of a frame in the middle of the universal joint structure, and the outer sleeve drives the inner sleeve to integrally move along the Y-direction guide rail in the direction of the Y-direction rotating shaft; the central frame structure of the universal joint structure is fixedly connected with the outer ring structure through an X-direction bearing, so that the inner sleeve and the outer sleeve rotate relative to the outer ring along an X-direction rotating shaft; the semicircular structure of the weight tray is arranged at the lower end of the multi-element loading sleeve and is arranged at the two ends of the left horizontal plane and the right horizontal plane of the outer ring through the Y-direction bearing, so that the semicircular structure can rotate relative to the outer ring at the Y-direction rotating shaft.
The multi-element loading sleeve is provided with a balance gesture measuring component, wherein the balance gesture measuring component comprises a base and an accelerometer, the base is arranged in an inner sleeve of the multi-element loading sleeve, and the base is provided with a disturbance 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 an unloading mechanism, the weight tray can be quickly supported by the unloading mechanism, so that the weight load applied to the wind tunnel balance suddenly disappears, 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 arranged on the X-direction guide rail on the bottom plate, and the X-direction screw rod which is arranged in parallel with the X-direction guide rail is utilized to drive the unloading frame to move along the X direction; the unloading frame is provided with an unloading shell, the upper end face and the lower end face of the unloading shell respectively form an unloading face I and an unloading face II, the unloading shell is driven to move up and down along a Z-direction guide rail by a Z-direction lead screw arranged on the unloading frame, and the unloading face can be quickly supported by the Z-direction lead screw.
The vibration isolation base is also provided with a reference distance measuring mechanism, and the reference distance measuring mechanism 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 face and the lower end face of the base B are parallel, the guide rail is arranged on the upper end face in parallel, the grating ruler is perpendicular to the direction of the guide rail, the grating ruler is arranged on the guide rail through a sliding block, and the screw rod which is arranged in parallel with the guide rail is utilized to drive the grating ruler to move along the guide rail; when the axis of the wind tunnel balance is in a 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 the ruler head at the front end of the grating ruler is matched with a multi-element loading sleeve or a wind tunnel test model to realize accurate measurement of a reference distance.
The invention has the remarkable effects that: the preparation device for the wind tunnel balance force test 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 like, the assembly of a model balance support rod and the like can be realized; the dynamic characteristic detection of the model balance support rod system under the action of a larger weight load of more than 30kg can be realized; the measurement accuracy of the reference distance in the wind tunnel balance force measurement test can reach 0.01mm; the wind tunnel balance force measurement device can realize various functions such as 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, so that the accuracy, reliability and efficiency of wind tunnel balance force measurement test preparation are greatly improved.
Drawings
FIG. 1 is a schematic diagram of a wind tunnel balance force test preparation device according to the present invention;
FIG. 2 is a schematic diagram of a part of the wind tunnel sky horizontal posture motion control and loading part in FIG. 1;
FIG. 3 is a schematic view of the loading sheath 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 measuring structure of 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 roll locking mechanism; 6. a roll motion mechanism; 7. a multi-element loading sleeve; 8. a balance attitude measurement unit; 9. a reference distance measuring mechanism; 10. a bracket; 11. an inner sleeve; 12. a jacket; 13. 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 axis; 25. the load acting direction of the weight; 26. a Y-direction guide rail; 27. an X-direction guide rail; 28. unloading a surface I; 29. an X-direction screw rod; 30. an X-direction guide rail; 31. unloading a surface II; 32. a Z-direction screw rod; 33. a screw rod; 34. a guide rail; 35. a grating ruler; 36. and a base B.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
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 motion mechanism 4, a rolling motion mechanism 6, a multi-element loading sleeve 7 and a reference distance measurement mechanism 9, wherein the pitching motion mechanism 4 and the rolling motion mechanism 6 are fixed on the vibration isolation base 1 through a bracket 10, a pitching locking mechanism 3 and a rolling locking mechanism 5 are arranged on the bracket 10, and the pitching motion mechanism 4 and the rolling motion mechanism 6 can be respectively locked and fixed according to requirements; the axis of the rolling motion mechanism 6 is provided with a multi-element loading sleeve 7, and a balance gesture measuring component 8 is arranged on the multi-element loading sleeve to measure the pitching angle and the rolling 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 a vibration isolation ditch; a reference distance measuring mechanism 9 is also arranged on the vibration isolation base 1 at one side of the bracket 10, so that accurate measurement of the reference distance is realized;
as shown in fig. 2, the pitching mechanism 4 is a double-fan-shaped structure 14, and a rolling mechanism 6 is fixedly arranged between the double-fan-shaped structures 14 to form an integral structure, and the central end of the fan-shaped structure 14 is fixed on two supporting arms on the upper end face of the bracket 10 through a bearing, so that the pitching mechanism 4 and the rolling mechanism 6 rotate along the central axis of the fan-shaped 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 bracket 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; the encoder in the servo motor can accurately measure and obtain the motion angle of the pitching motion mechanism; the upper end faces of the brackets 10 positioned on two sides of the double fan-shaped structures 14 of the pitching motion mechanism 4 are provided with raised bases A18, and a pitching locking mechanism 3 is arranged in the bases A18, and is used for uniformly clamping the fan-shaped structures 14 through hydraulic pressure and springs to lock the pitching motion mechanism 4; the rolling motion mechanism 6 is provided with a worm and wheel structure capable of rolling motion along the direction vertical to the rotation axis of the pitching motion mechanism 4, and the worm and wheel structure 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 movement mechanism 6 is provided with a rolling locking mechanism 5 which is sleeved on a worm in the rolling movement mechanism 6, and symmetrical band-type brake action taking the axis of the worm in the rolling movement mechanism 6 as a reference is realized through a hydraulic mechanism and a spring, so that uniform locking of the rolling movement mechanism 6 is realized; the wind tunnel balance 13 is arranged on the rolling motion mechanism 6, so that the wind tunnel balance 13 can perform pitching and rolling motions under the drive of the pitching motion mechanism 4 and the rolling motion 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, and the multi-element loading sleeve 7 can perform controllable relative movement in the X direction of the axis of the multi-element loading sleeve 7 and the horizontal Y direction of the vertical axis; the weight tray 20 is installed at the lower end of the multi-element loading sleeve 7 through the loading line 19, the balance attitude measurement component 8 is installed on the multi-element loading sleeve 7, wherein the balance attitude measurement component 8 comprises a base and an accelerometer, the base is installed in the inner sleeve 11 of the multi-element loading sleeve 7, the interference quartz accelerometer is installed on the base, the relative position relationship between the balance measurement component and the multi-element loading sleeve is ensured through the base, the measurement of the pitching angle and the rolling angle of a wind tunnel balance terminal is realized through the flexible quartz accelerometer, and the influence of the wind tunnel balance elastic angle on the wind tunnel balance accuracy assessment under the action of weight load is effectively avoided.
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 rotation shaft 23, the outer sleeve 12 is mounted on the Y-direction guide rail 26 of the central frame of the universal joint structure, and the outer sleeve 12 drives the inner sleeve 11 to move along the Y-direction guide rail 26 as a whole in the direction of the Y-direction rotation 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 the two ends of the left horizontal plane and the right horizontal plane of the outer circular ring through the Y-direction bearing 22, so that the semicircular structure can rotate relative to the outer circular ring at the Y-direction rotating shaft 24; the intersection point of the two rotating shafts of the universal joint is always coincided with the load direction of the weight tray 20, so that the final direction of the weight is always downward along the plumb line, and the relative positions of the load action points of the weights 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 moment with the specified size is generated; when the wind tunnel balance 13 is in a state of a specified pitching angle and a specified rolling angle, weights are mounted on the weight tray 20, weight loads are decomposed on the body shafting of the wind tunnel balance 13, axial force, normal force and lateral force with specified magnitudes are generated, X-direction relative displacement 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, Y-direction relative displacement generated by the multi-element loading sleeve inner sleeve 11 and the multi-element loading sleeve outer sleeve 12 is accurately measured by the scale on the multi-element loading sleeve outer sleeve 12, and therefore pitching moment, yaw moment and rolling moment with specified magnitudes are generated on the body shafting of the wind tunnel balance 13. And (3) reversely calculating the stress condition of the wind tunnel balance 13 by using the acquired voltage output of the wind tunnel balance 13 and an existing wind tunnel balance 13 calibration formula, and comparing the stress condition with the axial force, the normal force, the lateral force, the pitching moment, the yawing moment and the rolling moment which are applied to the wind tunnel balance 13 and with the specified magnitude, so as to realize the accuracy evaluation of the wind tunnel balance 13.
As shown in fig. 4, 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 mounted on the bottom plate along the X-direction, the unloading frame is mounted 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 face and the lower end face of the unloading shell respectively form an unloading face I28 and an unloading face II31, the unloading shell is driven to move up and down along a Z-direction guide rail by a Z-direction screw rod 32 arranged on the unloading frame, the Z-direction screw rod 32 can be used for rapidly supporting the unloading face, so that weight load applied to the wind tunnel balance suddenly disappears, 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 shell structure, the upper and lower end surfaces of the base B are parallel, the guide rail 34 is installed on the upper end surface in parallel, the grating ruler 35 is arranged perpendicular to the guide rail 34, and is installed on the guide rail 34 through a sliding block, and the screw rod 33 arranged in parallel with the guide rail 34 drives 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 the ruler head at the front end of the zero reference is matched with the multi-element 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 test preparation device provided by the invention is as follows: (1) The wind tunnel balance 13 is arranged on an installation seat on the rolling motion mechanism 6, and the multi-element loading sleeve 7 is arranged at the front end of the wind tunnel balance 13. A specified weight is mounted on the tray 20, the pitching motion mechanism 4 and the rolling motion mechanism 6 are controlled to adjust the posture of the wind tunnel balance 13 to a specified angle, and the angle is measured by the wind tunnel balance posture measuring component 8, so that a three-component force load with a specified size is generated on the wind tunnel balance 13. The multi-element loading sleeve jacket 12 is moved, so that the multi-element loading sleeve jacket 12 and the multi-element loading sleeve 11 generate relative displacement with specified magnitude, and the displacement is measured by the reference distance measuring mechanism 9, so that three-component moment load with specified magnitude 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 performing accuracy evaluation calculation of the wind tunnel balance 13; if the wind tunnel balance 13 belongs to a piezoelectric balance, the unloading mechanism 2 rapidly supports weights, and the wind tunnel balance 13 voltage output is collected by a wind tunnel balance matching data acquisition system to evaluate and calculate the accuracy of the wind tunnel balance 13. (2) After the accuracy evaluation of the wind tunnel balance 13 is completed, the multi-element 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. And (3) completing the assembly work of the parts such as the model rudder, the upper cover and the like. (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 be used as a reference distance calculation basis of the test model. (5) The weight is mounted on the model, the unloading mechanism 2 rapidly supports the weight, and step dynamic load input is provided for the model balance system mounted on the rolling motion mechanism 6, so that dynamic characteristic detection of the model balance system is performed. (6) After the above operation is completed, the wind tunnel balance 13 with the test model can be detached from the rolling motion mechanism 6 and installed in a wind tunnel to perform wind tunnel test.
Claims (8)
1. The utility model provides a wind-tunnel balance force test preparation device which 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 bracket (10); a multi-element loading sleeve (7) is arranged on the axis of the rolling motion mechanism (6), and a balance gesture measuring component (8) is arranged on the multi-element loading sleeve to measure the pitching angle and the rolling 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 utilizing a vibration isolation groove, and a weight tray at the lower end of the multi-element loading sleeve (7) can be quickly supported by utilizing the unloading mechanism (2); the pitching movement mechanism (4) is of a double-fan-shaped structure (14), and a rolling movement mechanism (6) is arranged between the double-fan-shaped structure (14) to form an integral structure; the center end of the fan-shaped structure (14) is fixed on two supporting arms on the upper end face of the bracket (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; the rolling motion mechanism (6) is provided with a worm and gear structure capable of rolling motion along the direction vertical to the rotation axis of the pitching motion mechanism (4), and the worm and gear structure is driven by a high-precision servo motor with an encoder and measures the angle of the rolling motion.
2. The wind tunnel balance force test preparation device according to claim 1, wherein: an arc-shaped rack (16) is arranged on the arc end surface of the fan-shaped structure (14), is meshed and matched with a driving gear (17) arranged on the bracket (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); the encoder in the servo motor can accurately measure and obtain the movement angle of the pitching movement mechanism.
3. The wind tunnel balance force test preparation device according to claim 1, wherein: the pitching mechanism comprises a pitching mechanism body (4), wherein protruding bases A (18) are arranged on the upper end faces of brackets (10) on two sides of a double-fan-shaped structure (14), pitching locking mechanisms (3) are arranged in the bases A (18), and the fan-shaped structure (14) is uniformly clamped through hydraulic pressure and springs, so that the pitching mechanism body (4) is locked.
4. The wind tunnel balance force test preparation device according to claim 1, wherein: the wind tunnel balance (13) is arranged on the rolling motion 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 Y-direction guide rail (26) of a central frame of the universal joint structure, and the outer sleeve (12) drives the inner sleeve (11) to move integrally 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 relative to the outer ring along an X-direction rotating shaft (23); the semicircular structure of the weight tray (20) is arranged at the lower end of the multi-element loading sleeve (7) and is arranged at the two ends of the left horizontal plane and the right horizontal plane of the outer circular ring through the Y-direction bearing (22), so that the semicircular structure can rotate relative to the outer circular ring at the Y-direction rotating shaft (24).
5. The wind tunnel balance force test preparation device according to claim 4, wherein: the multi-element loading sleeve (7) is provided with a balance gesture measuring component (8), wherein the balance gesture measuring component (8) comprises a base and an accelerometer, the base is arranged in an inner sleeve (11) of the multi-element loading sleeve (7), and the base is provided with a disturbance quartz accelerometer.
6. The wind tunnel balance force test preparation device according to claim 4, wherein: the lower end of the multi-element loading sleeve (7) is connected with a weight tray (20) through a loading line (19), the weight tray (20) is placed on the unloading mechanism (2), the weight tray can be quickly supported by the unloading mechanism (2), so that the weight load applied to the wind tunnel balance (13) suddenly disappears, and step transient load input is provided for the wind tunnel balance (13).
7. The wind tunnel balance force 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 X-direction screw rod (29) which is arranged in parallel with the X-direction guide rail (30) is utilized to drive the unloading frame to move along the X direction; the unloading frame is provided with an unloading shell, the upper end face and the lower end face of the unloading shell respectively form an unloading face I (28) and an unloading face II (31), the unloading shell is driven to move up and down along a Z-direction guide rail by a Z-direction lead screw (32) arranged on the unloading frame, and the unloading face can be quickly supported by the Z-direction lead screw (32).
8. The wind tunnel balance force 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 face and the lower end face of the base B are parallel, the guide rail (34) is arranged on the upper end face in parallel, the grating ruler (35) is perpendicular to the guide rail (34), the grating ruler is arranged on the guide rail (34) through a sliding block, and the screw rod (33) which is arranged in parallel with the guide rail (34) is utilized to drive the grating ruler (35) to move along the guide rail (34); when the axis of the wind tunnel balance (13) is in a 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); a zero reference is arranged on the grating ruler (35), and the ruler head at the front end of the zero reference is matched with the multi-element loading sleeve (7) or the wind tunnel test model to realize accurate measurement of the reference distance.
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| CN201910387943.7A CN110108441B (en) | 2019-05-10 | 2019-05-10 | Wind tunnel balance force test preparation device |
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| CN201910387943.7A CN110108441B (en) | 2019-05-10 | 2019-05-10 | Wind tunnel balance force test preparation device |
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| CN110108441A CN110108441A (en) | 2019-08-09 |
| CN110108441B true CN110108441B (en) | 2024-07-16 |
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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 |
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