CN112362295A - Low-speed wind tunnel tail support model test preparation method and device of pitching mechanism - Google Patents
Low-speed wind tunnel tail support model test preparation method and device of pitching mechanism Download PDFInfo
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- CN112362295A CN112362295A CN202110042452.6A CN202110042452A CN112362295A CN 112362295 A CN112362295 A CN 112362295A CN 202110042452 A CN202110042452 A CN 202110042452A CN 112362295 A CN112362295 A CN 112362295A
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Abstract
The invention discloses a low-speed wind tunnel tail boom model test preparation method and device of a pitching mechanism. According to the invention, all installation and debugging work of the tail boom test model and the support is completed on the simulation tail boom of the ground preparation room, and the tail boom model is rapidly transferred and installed between the ground preparation room and the test section through two devices, so that the workload and time of the preparation items before the test, such as installation and debugging of the tail boom model in the test section, can be remarkably saved, and the test efficiency of the wind tunnel model tail boom can be effectively improved.
Description
Technical Field
The invention relates to the field of aerodynamics, in particular to a low-speed wind tunnel tail boom model test preparation method and device of a pitching mechanism in a wind tunnel test.
Background
In the traditional low-speed wind tunnel tail boom model test, the installation of a balance, a support rod and a test model and the debugging work of a measuring system are directly carried out in a wind tunnel test section. In order to realize debugging and installation, the top of the wind tunnel is detached in the traditional method, the model is hung into the wind tunnel through a traveling crane outside a wind tunnel test section, and then an operator carries out installation and connection.
The above-described conventional methods face several technical and engineering problems:
firstly, because the field hoisting is adopted, the installation process comprises the steps of firstly connecting the transverse strut with the tail support, then connecting the oblique strut with the transverse strut, and finally connecting the oblique strut with the balance in the test model. Because the test model belongs to a large object, the general weight exceeds one ton, the balance is arranged in the abdominal cavity of the test model, the balance belongs to a precise part, and in the connection process, the balance can be damaged or the precision of the balance is damaged as long as a little angle change exists, so that the calibration work of field installation is very difficult to control.
Secondly, because the field hoisting is adopted, the installation position is higher than the ground by more than 2m, an operator needs to work in a short distance, the risk that the test model falls off can be faced at any time when the operator connects and calibrates a large-mass object in the air, and the risk is brought to the personal safety of the operator.
Finally, with the development of technology and the requirement on test precision, the newly-built wind tunnel belongs to a top closed wind tunnel, the top of the wind tunnel cannot be dismantled, and the traveling crane cannot be installed in the wind tunnel and a structure similar to a guide rail cannot be installed in the wind tunnel by considering the space in the wind tunnel.
Therefore, the conventional installation calibration method cannot meet the existing technical requirements, and a new method needs to be designed.
Disclosure of Invention
The invention aims to provide a new preparation method, so that a test model is integrally fed into a wind tunnel to be connected with a tail support after being installed and calibrated outside the wind tunnel, and meanwhile, the damage to the internal surface structure of the wind tunnel in the installation process is avoided, and the influence on a flow field of a wind tunnel blowing test is avoided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-speed wind tunnel tail boom model test preparation method of a pitching mechanism is applied to a wind tunnel test section with a closed top, and comprises the following steps:
s1: the test model is installed and connected with the transverse supporting rod and the inclined supporting rod on the ground outside the wind tunnel into a whole, mutual calibration is carried out, and the calibrated whole test model is fixedly connected to the moving mechanism;
s2, forming a high-speed airflow layer between the bottom of the moving mechanism and the ground through air injection to enable the moving mechanism and the whole test model to float, and suspending the moving mechanism to a lifter by an operator;
s3, conveying the moving mechanism to a wind tunnel port through a lifter, and pushing the moving mechanism to move close to the test supporting mechanism along a guide rail arranged in the wind tunnel through a roller mechanism;
s4, adjusting the position of the test model on the moving mechanism through a driving motor and a sliding block mechanism on the moving mechanism to enable the connecting end of the transverse strut to change the position relative to the connecting end of the tail supporting mechanism, so that the connecting end of the transverse strut is aligned and connected with the connecting end of the tail supporting mechanism;
s5: after the connection is finished, the locking of the transverse supporting rod is released, and the moving mechanism is moved away from the wind tunnel.
A low-speed wind tunnel tail boom model test preparation device of a pitching mechanism comprises a moving mechanism, a lifting mechanism and a lifting mechanism, wherein the moving mechanism comprises:
a bottom plate, four supporting columns arranged on the bottom plate, an air cushion arranged at the bottom of the supporting columns, an angle adjusting mechanism arranged on the bottom plate,
the angle adjusting mechanism comprises a first supporting platform, a first guide rail arranged on the first supporting platform, a second supporting platform connected on the first guide rail, a second guide rail arranged on the second supporting platform, and a third supporting platform connected on the second guide rail,
said second support table moving along a first guide rail, said third support table moving along a second guide rail,
the third supporting platform is provided with a supporting rod clamping frame, the top end of the supporting rod clamping frame is provided with a supporting rod clamping seat,
and rollers are arranged on the symmetrical sides of the bottom plate.
In the above technical scheme, the moving direction of the first guide rail is not parallel to the moving direction of the second guide rail, and the clamping axial direction of the clamping seat is parallel to the moving direction of the second guide rail.
In the technical scheme, the support rod clamping frame is provided with a rolling structure for adjusting the support rod, the rolling structure is arranged on the support rod clamping seat, or the rolling structure is arranged at the bottom of the support rod clamping frame.
In the technical scheme, when the rolling structure is arranged on the supporting rod clamping seat, the supporting rod clamping seat comprises a guide rail base and an arc-shaped guide rail arranged on the guide rail base, and the supporting rod hoop is arranged on the arc-shaped guide rail through the slider connecting seat.
In the above technical scheme, when the rolling structure is arranged at the bottom of the supporting rod clamping frame, a third guide rail is arranged between the second guide rail and the third supporting platform, the third guide rail is connected to the second guide rail and moves along the second guide rail, and the third supporting platform is connected to the third guide rail and moves along the third guide rail.
In the above technical solution, a plane formed by the third supporting table moving along the third guide rail is parallel to the moving direction of the first guide rail, and a rotation axis (center) formed by the third supporting table moving along the third guide rail is parallel to and collinear with the clamping axis of the clamping base.
In above-mentioned technical scheme, including setting up the motor that the output was used to the second supporting bench on first supporting bench, set up the motor that the output was used to the third supporting bench on the second supporting bench.
In the technical scheme, the test device is used for carrying out overlooking connection on the test model.
In the technical proposal, when the back support connection is carried out on the test model, the supporting rod clamping frame is not provided with the supporting rod clamping seat,
the supporting rod clamping frame comprises a first supporting frame and a second supporting frame which are symmetrically connected on a third supporting platform, the first supporting frame and the second supporting frame are respectively connected with the third supporting platform through hinge structures,
two electric push rods are arranged on the third supporting platform, the output ends of the two electric push rods are respectively connected to the first supporting frame and the second supporting frame,
the tops of the first support frame and the second support frame are far away from each other.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention changes the traditional connection and installation method for tail support, and realizes the whole calibration of the test model outside the wind tunnel and then the connection inside the wind tunnel by designing a moving mechanism;
the mounting method adopted by the invention can avoid the defect that the balance is difficult to connect and calibrate in the connection process in the prior art;
the method is suitable for the closed wind tunnel without an opening section, and the supporting mechanism can not directly contact the inner wall and the bottom plate of the wind tunnel in the installation and connection process and can not damage the bottom plate of the wind tunnel due to the supporting mechanism;
the tail boom model test device is simple in structure, can be operated by people, realizes debugging work of a measurement system and a support system of the model in different angle states, and completes all installation preparation work before a tail boom model test.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of the overall structure of a moving mechanism;
FIG. 2 is a schematic view of the angle adjusting stage;
FIG. 3 is a schematic view of the angle adjusting stage;
FIG. 4 is a schematic structural view of a pole hoop;
FIG. 5 is a schematic structural view of a strut holder;
wherein: the device comprises a base plate 1, an air cushion 2, support columns 3, rollers 4, an angle adjusting mechanism 5, a first support table 5-1, a first guide rail 5-2, a second guide rail 5-3, a second support table 5-4, a third support table 5-5, a third guide rail 5-6, a second sliding block 5-7, a ladder frame 6, a support rod clamping frame 7, a first support frame 7-1, a second support frame 7-2, a hinge structure 7-3, an electric push rod 7-4, a support rod clamping seat 8, an arc-shaped guide rail 8-2, a first sliding block 8-2 and a support rod hoop 8-3.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, the overall movement structure of the tail boom of the pitching mechanism comprises a plurality of parts, a bottom plate 1 for supporting, support columns 3 arranged at four corners of the lower end of the bottom plate 1 respectively, air cushions 2 arranged at the bottoms of the support columns 3, a ladder frame 6 for an operator to walk arranged on the bottom plate 1, a support rod clamping frame 7 for supporting a test model arranged on the bottom plate 1, and a mechanism 5 for adjusting the position and angle of the test model arranged between the support rod clamping frame 7 and the bottom plate 1.
In this embodiment, the preparation before the test is performed outside the wind tunnel, that is, the test model is connected to the strut holding frame 7 by using a hoisting device or a traveling crane outside the wind tunnel, and then the whole moving mechanism together with the test model is moved into the wind tunnel, and the test model is connected to the supporting mechanism. In this embodiment, the reason why the preparation is performed outside the wind tunnel is that the wind tunnel environment of this embodiment is a closed top wind tunnel, and the wind tunnel cannot be provided with a hoisting device outside the wind tunnel or provided with a traveling crane inside the wind tunnel to hoist the test model, so that the test preparation work can only be performed outside the wind tunnel. Considering the whole weight of the test model and the whole weight and volume of the moving mechanism, the air cushion 2 is arranged at the bottom of the supporting column 3, and an air supply system of the wind tunnel is used for supplying air to the air cushion, so that the air cushion 2 expands to provide an upward buoyancy for the whole moving mechanism. The buoyancy provided by the air cushion 2 on each supporting column 3 enables the moving mechanism to be suspended, and under the suspended state, a test operator can move the position of the moving mechanism by pushing the moving mechanism. The moving mechanism is very easy to move in a suspended state, and because a moving auxiliary structure similar to a guide rail is not required to be provided, the whole moving mechanism cannot cause additional damage to the ground in the moving process, particularly in the test environment of the wind tunnel. The whole moving mechanism is installed and prepared on the ground, and the actual wind tunnel test section is erected in the air, so that the moving hook needs to be transferred by adopting a lifting device. Therefore, in the embodiment, the air cushion 2 is adopted for supporting and floating transportation, so that the integral moving mechanism can very easily enter the lifting device, and the objective defect of mutual interference of mechanical structures cannot exist in the transferring process.
After entering the wind tunnel, be provided with the guide rail that is used for the removal in the wind tunnel, and be provided with gyro wheel 4 respectively in moving mechanism's symmetry both sides, promote moving mechanism and make gyro wheel 4 and guide rail cooperation, then discharge the gas in the air cushion 2, directly make moving mechanism slide on the track, reduce the weight that increases when the ladder frame 6 on moving mechanism is standing up the man-hour and probably lead to the buoyancy of air cushion insufficient for moving mechanism damages the wind tunnel bottom plate.
Example one
In the present embodiment, as shown in fig. 2, the angle adjusting mechanism 5 includes a first supporting table 5-1 disposed on the bottom plate 1, two first guide rails 5-2 are disposed on the first supporting table 5-1, a second supporting table 5-4 is connected to the first guide rails 5-2 through sliders, and the second supporting table 5-4 moves along the first guide rails 5-2. The first supporting table is provided with a motor, the motor controls output acting force to the second supporting table through a control system, and the second supporting table 5-4 can move quantitatively along the first guide rail 5-2 through control.
The second support table 5-4 is fixedly connected with two second guide rails 5-3, the second guide rails 5-3 are connected with a third support table 5-5 through sliders, the second support table 5-4 is provided with a motor, and the third support table 5-5 is moved along the direction of the second guide rails 5-3 by controlling the motor to do work and outputting the work to the third support table 5-5.
In the present embodiment, the second guide rail 5-3 and the first guide rail 5-2 are not parallel to each other in space, and the best arrangement direction is that the second guide rail 5-3 and the first guide rail 5-2 are arranged orthogonally in space.
A supporting rod clamping frame 7 is arranged on the third supporting platform 5-5, as shown in fig. 5, a rod clamping seat is fixedly connected to the top of the supporting rod clamping frame 7, as shown in fig. 4, the rod clamping seat comprises a base, an arc-shaped guide rail 8-1 arranged on the base, a first sliding block 8-2 connected to the arc-shaped guide rail 8-1, and a supporting rod hoop 8-3 connected to the first sliding block 8-2. The deflection angle of the axial direction of the support rod hoop 8-3 relative to the arc-shaped guide rail can be changed by sliding the support rod hoop 8-3 on the arc-shaped guide rail 8-1.
When the supporting rod clamping frame 7, the rod clamping seat and the angle adjusting structure are integrated, a balance supporting rod of the test model is fixed on a supporting rod hoop 8-3, the horizontal position of the balance supporting rod relative to the tail support connecting mechanism can be adjusted by changing the position of the second supporting platform 5-4 relative to the first supporting platform 5-1, the front and back position of the balance supporting rod relative to the tail support connecting mechanism can be adjusted by changing the position of the third supporting platform 5-5 relative to the second supporting platform 5-4, and the rolling angle position of the balance supporting rod can be adjusted by changing the deflection position of the supporting rod hoop 8-3 relative to the arc-shaped guide rail 8-1. The position of the test model in the wind tunnel can be adjusted through comprehensive adjustment, and accurate butt joint of a balance support rod on the test model and the supporting mechanism is met.
Example two
On the basis of the first embodiment, in the present embodiment, as shown in fig. 3, a set of third guide rails 5-6 is additionally arranged between the third support table 5-5 and the second guide rail 5-3, and the third guide rails 5-6 are connected to the second guide rail 5-3 through second sliders 5-7. The third guide rail 5-6 is an arc-shaped guide rail, the third support table 5-5 slides on the third guide rail 5-6 through the connecting slide block, so that the third support table 5-5 integrally deflects at an angle along the third guide rail 5-6, and the support rod clamping frame 7 arranged on the third support table 5-5 also rotates along with the third guide rail, thereby driving the support rod hoop 8-3 to rotate.
In the above embodiment, the third guide rail 5-6 and the arc-shaped guide rail 8-1 may be present at the same time, or may be one in the whole mechanism as long as the angular rotation of the anchor ear 8-3 is achieved. The arrangement of these structures is a preparation for the tail support structure.
EXAMPLE III
On the basis of the second embodiment, when the back-supporting structures need to be connected, the hoop structure cannot be arranged in the whole mechanism, and the angle rotation of the balance support rod can be changed only by adopting the structure of the third guide rails 5-6. The supporting rod clamping frame 7 is not provided with a supporting rod clamping seat, the supporting rod clamping frame 7 comprises a first supporting frame 7-1 and a second supporting frame 7-2 which are symmetrically connected to a third supporting table, the first supporting frame 7-1 and the second supporting frame 7-2 are respectively connected with the third supporting table 5-5 through hinge structures 7-3, the third supporting table 5-5 is provided with two electric push rods 7-4, the output ends of the two electric push rods 7-4 are respectively connected to the first supporting frame 7-1 and the second supporting frame 7-2, and the mutual distance between the tops of the first supporting frame 7-1 and the top of the second supporting frame 7-2 is changed through the action of a motor.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A low-speed wind tunnel tail boom model test preparation method of a pitching mechanism is applied to a wind tunnel test section with a closed top, and is characterized by comprising the following steps:
s1: the test model is installed and connected with the transverse supporting rod and the inclined supporting rod on the ground outside the wind tunnel into a whole, mutual calibration is carried out, and the calibrated whole test model is fixedly connected to the moving mechanism;
s2, forming a high-speed airflow layer between the bottom of the moving mechanism and the ground through air injection to enable the moving mechanism and the whole test model to float, and suspending the moving mechanism to a lifter by an operator;
s3, conveying the moving mechanism to a wind tunnel port through a lifter, and pushing the moving mechanism to move close to the test supporting mechanism along a guide rail arranged in the wind tunnel through a roller mechanism;
s4, adjusting the position of the test model on the moving mechanism through a driving motor and a sliding block mechanism on the moving mechanism to enable the connecting end of the transverse strut to change the position relative to the connecting end of the tail supporting mechanism, so that the connecting end of the transverse strut is aligned and connected with the connecting end of the tail supporting mechanism;
s5: after the connection is finished, the locking of the transverse supporting rod is released, and the moving mechanism is moved away from the wind tunnel.
2. A test preparation apparatus for carrying out the method of claim 1, wherein the test preparation apparatus comprises the moving mechanism, the moving mechanism comprising:
a bottom plate, four supporting columns arranged on the bottom plate, an air cushion arranged at the bottom of the supporting columns, an angle adjusting mechanism arranged on the bottom plate,
the angle adjusting mechanism comprises a first supporting platform, a first guide rail arranged on the first supporting platform, a second supporting platform connected on the first guide rail, a second guide rail arranged on the second supporting platform, and a third supporting platform connected on the second guide rail,
said second support table moving along a first guide rail, said third support table moving along a second guide rail,
the third supporting platform is provided with a supporting rod clamping frame, the top end of the supporting rod clamping frame is provided with a supporting rod clamping seat,
and rollers are arranged on the symmetrical sides of the bottom plate.
3. The test preparation apparatus of claim 2, wherein the direction of movement of the first rail and the direction of movement of the second rail are not parallel to each other, and the clamping axis of the clamping base and the direction of movement of the second rail are parallel to each other.
4. The test preparation apparatus of claim 2, wherein the strut holder is provided with a rolling structure for adjusting the strut, the rolling structure being provided on the strut holder, or the rolling structure being provided at the bottom of the strut holder.
5. The test preparation apparatus of claim 4, wherein when the rolling structure is disposed on the strut holder, the strut holder includes a rail base and an arc-shaped rail disposed on the rail base, and the strut hoop is disposed on the arc-shaped rail through the slider connection seat.
6. The test preparation apparatus of claim 4, wherein when the rolling structure is disposed at the bottom of the strut holder, a third guide rail is disposed between the second guide rail and a third support table, the third guide rail being connected to and moving along the second guide rail, and the third support table being connected to and moving along the third guide rail.
7. The test preparation apparatus of claim 6, wherein the plane formed by the third support table moving along the third guide rail is parallel to the moving direction of the first guide rail, and the center of the rotation axis formed by the third support table moving along the third guide rail is parallel to and collinear with the clamping axis of the clamping base.
8. The test preparation apparatus according to claim 6, wherein the apparatus comprises a motor provided in the first support table and outputting and acting on the second support table, and a motor provided in the second support table and outputting and acting on the third support table.
9. Test preparation device according to one of claims 2 to 8, characterized by a nose-down connection for the test model.
10. The test preparation apparatus according to any one of claims 2 to 8, wherein the strut holding jig is not provided with a strut holding seat when back-supporting the test pattern,
the supporting rod clamping frame comprises a first supporting frame and a second supporting frame which are symmetrically connected on a third supporting platform, the first supporting frame and the second supporting frame are respectively connected with the third supporting platform through hinge structures,
two electric push rods are arranged on the third supporting platform, the output ends of the two electric push rods are respectively connected to the first supporting frame and the second supporting frame,
the tops of the first support frame and the second support frame are far away from each other.
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| CN202110042452.6A CN112362295B (en) | 2021-01-13 | 2021-01-13 | Low-speed wind tunnel tail support model test preparation method and device of pitching mechanism |
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