Variable angle support mechanism for slender rod wind tunnel force test

Abstract

The application discloses a variable-angle supporting mechanism for force test of an elongated rod in a wind tunnel, and relates to the technical field of wind tunnel test. The attitude adjusting device comprises a base, a deflection mechanism, a pitching mechanism and a mounting piece. The deflection mechanism comprises a first driving piece, a rocker arm and a rotating shaft. The transmission axis of the first driving piece intersects with the first rotating axis through the rocker arm. The first driving piece can be flexibly connected with the rotating shaft. The first driving piece can be extended to the side of the rotating shaft away from the wind tunnel through the rocker arm, so that the volume of the attitude adjusting device in the wind tunnel is reduced, the interference with experimental data is reduced, and in the case that the distance between the first rotating axis and the second rotating axis is small, the first driving piece is away from the central axis of the rotating shaft, the driving piece is not located on the moving path of the mounting piece around the second rotating axis, the first driving piece does not hinder the movement of the mounting piece around the second rotating axis, and the interference of the first driving piece with the rotation of the mounting piece is effectively avoided.

Description

Technical Field

[0001] This application relates to the field of wind tunnel testing technology, and in particular to a variable angle support mechanism for wind tunnel force measurement testing of slender rods. Background Technology

[0002] In-flight docking technology can greatly expand the mission capabilities of aircraft. Docking often employs slender rods as a docking solution, such as in-flight refueling and drone recovery. A slender rod extends from the forward flight platform, its attitude angle controlled by control surfaces, and the other end connects to the following aircraft to complete tasks such as refueling and cargo transfer. However, in real flight environments, these slender rods, due to their large length-to-diameter ratio and high structural flexibility, are prone to complex flow phenomena under different combinations of incoming flow velocities, angles of attack, and sideslip angles. These phenomena include large-scale flow separation, unsteady vortex shedding, and potential vortex-induced vibrations. These flow effects significantly impact the aerodynamic and moment characteristics of the rods, posing a severe challenge to the dynamic stability and control accuracy of the docking process. Therefore, accurately obtaining the aerodynamic loads of slender rods under different operating conditions through wind tunnel testing during the ground phase is crucial for a deep understanding of their flow mechanisms, verification of numerical simulation models, and guidance for the design of aerodynamic shapes and control systems.

[0003] Currently, when conducting force measurement tests on slender rods in wind tunnels, the rod model typically needs to be fixed to the wind tunnel test section using a support mechanism. To simulate the attitude changes of the rod relative to the incoming flow direction during actual flight, the support mechanism must be able to flexibly and precisely adjust the model's attitude angle. While some existing conventional support mechanisms can achieve angle adjustment, when applied to rod models with large aspect ratios and small diameters, they often fail to accurately simulate the rod's motion state and significantly interfere with the flow field, making it difficult to meet the requirements of high-precision aerodynamic measurements and directly affecting the reliability of the test data. Summary of the Invention

[0004] The purpose of this application is to provide a variable-angle support mechanism for wind tunnel force measurement tests of slender rods, thereby alleviating or solving the aforementioned technical problems existing in the prior art.

[0005] This application provides a variable-angle support mechanism for wind tunnel force measurement tests of slender rods. The variable-angle support mechanism includes a base, a deflection mechanism, a pitching mechanism, and a mounting component. The deflection mechanism and the pitching mechanism are connected by a transmission connection. One of the deflection mechanism and the pitching mechanism is connected to the base, and the other is connected to the mounting component. The mounting component is used to extend into the wind tunnel device and connect to the end of the rod. The deflection mechanism includes a first drive member, a rocker arm, and a rotating shaft. The first drive member is fixed to the base or the pitching mechanism. One end of the rocker arm is connected to the first drive member, and the other end is connected to the rotating shaft. The first drive member drives the rocker arm to deflect, thereby driving the rotating shaft and causing the mounting component to tilt relative to the base about a first rotation axis. The pitching mechanism can drive the mounting component to tilt relative to the base about a second rotation axis. The first rotation axis and the second rotation axis intersect.

[0006] The technical solution adopted in this application achieves the following beneficial effects: the pitch mechanism and the yaw mechanism can respectively drive the mounting rod to rotate along two intersecting rotation axes, thereby changing the attitude angle of the mounting rod and the rods connected to it. This setup, through the pitch and yaw mechanisms, realizes data information of the mounting rod and the rods connected to it under different attitudes during wind tunnel testing, providing data support for subsequent optimization. This reduces uncertainties caused by manual adjustments, improves the reliability of test data, and allows for continuous adjustment of the position and attitude of the mounting component and the rods connected to it to accurately simulate the motion state of the rods. It can continuously collect data, improving the continuity and stability of test results.

[0007] Compared to existing technologies, in this application, the base, deflection mechanism, and pitch mechanism can all be located outside the wind tunnel device, while the mounting component extends into the wind tunnel device. This reduces the volume of the variable-angle support mechanism entering the wind tunnel, thereby minimizing interference with the wind tunnel airflow. Based on the accurate adjustment of the rod's motion state by the mounting component to accurately simulate its motion, compared to methods such as fixing the support to the middle of the rod, fixing the end of the rod with the mounting component reduces the support's interference with the airflow, preventing airflow from being diverted or deflected by the support located in the middle of the rod. Furthermore, the first driving component of the deflection mechanism drives the rocker arm to deflect, thereby driving the rotating shaft and causing the mounting component to tilt relative to the base around the first rotation axis. Compared to directly driven shafts, this application uses a rocker arm to intersect the transmission axis and the first rotation axis of the first drive component. This allows for a flexible connection between the first drive component and the shaft. The first drive component can extend the rocker arm to the side of the shaft away from the wind tunnel device, avoiding the need for it to be installed inside the wind tunnel due to its large size. This reduces the volume of the variable angle support mechanism inside the wind tunnel, thereby reducing interference from airflow disturbances on experimental data and improving the stability and reliability of the test. Furthermore, in scenarios where the distance between the first and second rotation axes is close due to testing needs (such as simulating the internal layout of rods in an aircraft), the first drive component can be moved away from the central axis of the shaft, causing misalignment between the first drive component and the shaft. This prevents the drive component from being on the movement path of the mounting component around the second rotation axis, thus preventing the first drive component from obstructing the movement of the mounting component around the second rotation axis and effectively avoiding interference with the rotation of the mounting component. This allows the variable angle support mechanism to adapt to various testing needs and objects, meet high-precision aerodynamic measurement requirements, and improve the reliability of test data. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram illustrating the structure of the variable angle support mechanism, detection device, and rod in an exemplary embodiment of this application;

[0010] Figure 2 This is a schematic diagram of the structure of the variable angle support mechanism and detection device shown in an exemplary embodiment of this application;

[0011] Figure 3 This is a schematic diagram of the variable angle support mechanism and detection device from another perspective, illustrating an exemplary embodiment of this application;

[0012] Figure 4 This is a schematic diagram of the structure of the connector shown in an exemplary embodiment of this application;

[0013] Figure 5 This is a schematic diagram of the base structure shown in an exemplary embodiment of this application;

[0014] Figure 6 This is a schematic diagram illustrating the structure of the base, connecting seat, rotating shaft, and rocker arm in an exemplary embodiment of this application;

[0015] Figure 7 This is a cross-sectional view of a variable angle support mechanism, detection device, rod, and wind tunnel device illustrated in an exemplary embodiment of this application;

[0016] Figure 8 yes Figure 7 Enlarged view of point a in the image;

[0017] Figure 9 This is a schematic diagram of the fairing structure shown in an exemplary embodiment of this application.

[0018] Reference numerals: 100, Variable angle support mechanism; 110, Base; 111, Bracket; 112, First through hole; 120, Deflection mechanism; 121, First driving component; 122, Rocker arm; 123, Rotating shaft; 130, Pitch mechanism; 131, Connecting seat; 1311, First connecting part; 1312, Second connecting part; 1313, Second through hole; 1314, Driving part; 1315, Rotating part; 131 6. First bending section; 1317. Second bending section; 132. Second driving component; 133. Reinforcing structure; 1331. First reinforcing rib; 1332. Second reinforcing rib; 1333. Installation space; 140. Mounting component; 141. Transmission unit; 142. Mounting rod; 143. Mounting structure; 150. Fairing; 151. Opening; 200. Detection device; 300. Rod; 400. Wind tunnel device. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In existing wind tunnel tests, turbulent airflow occurs in certain areas, leading to unstable test data in these regions. The inventors discovered that this is because the rod structure requires a specific support structure, fixing it in a certain posture within the wind tunnel for stable testing. However, due to limitations imposed by the relative position of the support structure within the wind tunnel and its own structure, the support structure can disrupt the airflow in a specific area, causing instability in the stress state of the rod structure within that area and in the surrounding airflow conditions. This makes it difficult to meet the requirements for high-precision aerodynamic measurements, directly impacting the reliability of the test data.

[0022] This application provides a variable-angle support mechanism 100 for wind tunnel force measurement tests on slender rods, to solve the problems of poor accuracy and low data reliability in existing wind tunnel testing of rods. Please refer to... Figure 1 For ease of description, the following content will be referred to as the variable angle support mechanism 100.

[0023] Please see Figure 1 The variable-angle support mechanism 100 is used for wind tunnel testing of the rod 300. The wind tunnel device 400 is an experimental apparatus that simulates the motion of the rod 300 in a real fluid by artificially generating controllable airflow to study its aerodynamic characteristics, providing data support for design and performance optimization in fields such as aerospace, automotive, and construction. The rod 300 can be, for example, a refueling truss, and is not limited thereto.

[0024] Please see Figure 2The variable angle support mechanism 100 may include a base 110, a deflection mechanism 120, a pitch mechanism 130, and a mounting member 140. The deflection mechanism 120 and the pitch mechanism 130 are drive-connected, with one of them connected to the base 110 and the other connected to the mounting member 140. For example, the deflection mechanism 120 is connected to the base 110, and the pitch mechanism 130 is connected to the mounting member 140, with the two mechanisms being drive-connected. The deflection mechanism 120 and the pitch mechanism 130 can drive the mounting member 140 in different directions to change its relative position, attitude, etc. Of course, in other cases, the deflection mechanism 120 is connected to the mounting member 140, the pitch mechanism 130 is connected to the base 110, and the two mechanisms are drive-connected, which also allows the mounting member 140 to be driven in different directions; this will not be elaborated further here.

[0025] Please see Figure 2 The base 110 can be fixed to the wall or ground of the wind tunnel device 400. The fixing method of the base 110 can be threaded or snap-fit, etc., and there is no limitation. Preferably, the base 110 can be fixed to the outer surface of the wind tunnel device 400, such as the outer surface of the tunnel wall or underground space, to reduce interference factors in the wind tunnel test and avoid the base 110 interfering with the airflow inside the wind tunnel device 400, which would cause unstable test data.

[0026] Please see Figure 2 and Figure 3 At least a portion of the mounting member 140 extends into the wind tunnel device 400 and connects to the end of the rod 300. The mounting member 140 may have a snap-fit ​​or a mounting hole, taking a mounting hole as an example. At least one end of the rod 300 can be fitted onto at least a portion of the mounting member 140. The rod 300 has a positioning hole. The tester aligns the positioning hole and the mounting hole and secures the rod 300 with a pin to ensure that the rod 300 is stably mounted on the mounting member 140. Of course, the connection method between the rod 300 and the mounting member 140 can also be a threaded connection, etc., and there is no limitation.

[0027] Please see Figure 2 The deflection mechanism 120 includes a first drive member 121, a rocker arm 122, and a rotating shaft 123. The first drive member 121 is fixed to the base 110 or the pitch mechanism 130. The first drive member 121 can be a motor or a cylinder, etc. One end of the rocker arm 122 is connected to the first drive member 121, and the other end is connected to the rotating shaft 123. The rocker arm 122 and the rotating shaft 123 can be fixedly connected by screws to ensure that the rotating shaft 123 can rotate with the rocker arm 122. The first drive member 121 drives the rocker arm 122 to deflect, thereby driving the rotating shaft 123, so that the mounting member 140 rotates relative to the base 110 around a first rotation axis (e.g., ...). Figure 2(As shown in L1) Tilting. The pitch mechanism 130 can drive the mounting 140 relative to the base 110 about a second rotation axis (as shown in L1). Figure 2 (As shown in L2) Tilting. The first rotation axis and the second rotation axis intersect, and the included angle between the first rotation axis and the second rotation axis can be 30°, 45° or 90°, etc., without limitation.

[0028] The pitch mechanism 130 and the yaw mechanism 120 can respectively drive the mounting rod 142 to rotate along two intersecting rotation axes, thereby changing the attitude angles of the mounting rod 142 and the connected rod 300. The attitude angles can be angles of attack or roll angles, etc., and are not limited thereto. This setup allows the mounting rod 142 and the connected rod 300 to obtain data information under different attitudes during wind tunnel testing through the pitch mechanism 130 and the yaw mechanism 120. For example, the data information can be pressure, aerodynamic loads, etc., providing data support for subsequent optimization. This reduces uncertainties caused by manual adjustments, improves the reliability of test data, and allows for continuous adjustment of the position and attitude of the mounting rod 140 and the connected rod 300 to accurately simulate the motion state of the rod 300. It can continuously collect data, improving the continuity and stability of test results.

[0029] Understandably, when the first drive member 121 is a motor, the first drive member 121 can rotate in conjunction with the base 110 or the pitch mechanism 130. As the output shaft of the first drive member 121 extends or retracts, it can drive the rocker arm 122 to deflect. The first drive member 121 can also be rotatably configured relative to the base 110 or the pitch mechanism 130 to adapt to the deflection movement of the rocker arm 122.

[0030] In this application, the base 110, deflection mechanism 120, and pitch mechanism 130 can all be located outside the wind tunnel device 400, while the mounting member 140 extends into the wind tunnel device 400, reducing the volume of the variable angle support mechanism 100 entering the wind tunnel and thus minimizing interference with the airflow in the wind tunnel. Based on the accurate adjustment of the rod 300's motion state by the mounting member 140 to accurately simulate the rod 300's motion state, the end of the rod 300 is fixedly connected by the mounting member 140. Compared to a support fixed in the middle of the rod 300, this method only causes slight disturbance to the airflow at the end of the rod 300, reducing the interference of the support on the airflow and preventing the airflow from being diverted or deflected by a support located in the middle of the rod 300.

[0031] It should be noted that the relative positions of the first and second rotation axes in wind tunnel testing correspond to specific application scenarios, such as the two rotation axes of a refueling boom in an aircraft. This is how data from actual applications can be obtained for subsequent research.

[0032] Compared to directly driving the rotating shaft 123, in this application, the transmission axis of the first driving member 121 pushes the rocker arm 122 back and forth. This allows the transmission axis of the first driving member 121 and the first rotation axis to intersect through the rocker arm 122, achieving a flexible connection between the first driving member 121 and the rotating shaft 123. Furthermore, the first driving member 121 can extend the rocker arm 122 to the side of the rotating shaft 123 away from the wind tunnel device 400, preventing the first driving member 121 from being forced to be installed inside the wind tunnel device 400 due to excessive size. This reduces the volume of the variable angle support mechanism 100 within the wind tunnel device 400, further reducing interference with experimental data. In scenarios where the distance between the first and second rotation axes is close due to testing requirements (such as simulating the internal layout of the rod 300 in an aircraft), it can move the first drive member 121 away from the central axis of the rotating shaft 123, causing the first drive member 121 and the rotating shaft 123 to be misaligned. This avoids the drive member being on the movement path of the mounting member 140 around the second rotation axis, thereby preventing the first drive member 121 from obstructing the movement of the mounting member 140 around the second rotation axis and effectively avoiding its interference with the rotation of the mounting member 140. This allows the variable angle support mechanism 100 to adapt to various different testing requirements and objects, improving test safety.

[0033] In the embodiments of this application, please refer to Figure 2A deflection mechanism 120 is mounted on a base 110, and a pitch mechanism 130 is connected to a mounting member 140. The deflection mechanism 120 and the pitch mechanism 130 can drive the mounting member 140 in different directions to change its relative position, attitude, etc. The pitch mechanism 130 may include a connecting seat 131 and a second driving member 132. The second driving member 132 can be a motor, cylinder, etc., and is not limited thereto. The connecting seat 131 may include a first connecting portion 1311 and a second connecting portion 1312 connected together. The base 110 has a bracket 111, which may have a hollow structure to reduce weight. A rotating shaft 123 is rotatably mounted on the bracket 111 and connected to the first connecting portion 1311. Furthermore, the opposite ends of the rotating shaft 123 are rotatably fixed to the bracket 111 by bearings, allowing the rotating shaft 123 to rotate relative to the bracket 111 and drive the first connecting portion 1311. Mounting member 140 is rotatably mounted on second connecting part 1312. Second driving member 132 is drively connected to connecting seat 131 and mounting member 140. Second driving member 132 pushes mounting member 140, enabling mounting member 140 to tilt around second rotation axis. Second driving member 132 provides a suitable transmission path and support, ensuring that second driving member 132 can stably drive mounting member 140 to rotate. When the first rotation axis and second rotation axis are not consistent in different test rods 300 or application scenarios, and it is necessary to adjust the relative position between the first rotation axis and the second rotation axis, since the first connecting part 1311 and the second connecting part 1312 in this application are both provided on connecting seat 131, and connecting seat 131 is detachably connected to rotating shaft 123 and mounting member 140, only different connecting seats 131 need to be replaced to complete the adjustment of the first rotation axis and the second rotation axis. There is no need to modify other components such as base 110 and rotating shaft 123, which greatly reduces the component replacement cost and operation complexity during the adjustment process.

[0034] It is understood that the first connecting part 1311 has an opening, the rotating shaft 123 is inserted into the opening, and the rotating shaft 123 and the hole wall are circumferentially limited. For example, the first rotating axis (such as...) Figure 4 L1 (as shown in the diagram) can be the central axis of the opening in the first connecting part 1311. For example, a pin is inserted between the rotating shaft 123 and the hole wall. The first connecting part 1311 is configured to rotate together with the rotating shaft 123. Alternatively, in some other cases, the rotating shaft 123 is connected to the first connecting part 1311. In one case, the rotating shaft 123 and the first connecting part 1311 can be integrally formed, for example, by integral machining. The connection methods between the rotating shaft 123 and the first connecting part 1311 will not be listed or described in detail here.

[0035] In a more specific implementation, please refer to Figure 4 and Figure 5 The bracket 111 has a first through hole 112, through which the rotating shaft 123 passes. It is understood that a rotating bearing can be installed within the first through hole 112 to improve the smoothness of the rotation of the rotating shaft 123. One end of the rocker arm 122 is connected to the rotating shaft 123, and the other end extends away from the second connecting portion 1312 and is connected to the first driving member 121. This application increases the distance between the first driving member 121 and the second connecting portion 1312 by extending the rocker arm 122, avoiding interference when the mounting member 140 rotates around the central axis of the first through hole 112, ensuring that the rotation of the mounting member 140 is unimpeded, and guaranteeing smooth switching of the position adjustment of the rod 300. Furthermore, please refer to... Figure 4 as well as Figure 6 The second connecting portion 1312 has a second through hole 1313, and the mounting member 140 has a rotating shaft, which is rotatably mounted in the second through hole 1313. For example, the second rotating axis (e.g.) Figure 4 L2 (as shown in the diagram) can be the central axis of the second through hole 1313. The second through hole 1313 can also be equipped with a rotary bearing to improve the smoothness of rotation of the mounting part 140 relative to the connecting seat 131 and the stability of the test.

[0036] Preferably, the first drive member 121 and the rotating shaft 123 are spaced apart along the second rotation axis. The first drive member 121 is located on one side of the rotating shaft 123, which avoids the first drive member 121 being on the rotation path of the mounting member 140, and further avoids interference when the first drive member 121 rotates around the central axis of the second through hole 1313, ensuring that the rotation process of the mounting member 140 is unimpeded, and ensuring smooth switching and detection of the posture adjustment of the mounting member 140 and the rod 300 connected thereto during wind tunnel testing.

[0037] In the embodiments of this application, please refer to Figure 7 as well as Figure 8The base 110 is installed outside the wind tunnel device 400 to avoid interference with the airflow inside the wind tunnel device 400 and improve the reliability of test data. The mounting component 140 may include a transmission part 141 and a mounting rod 142, which are connected. The transmission part 141 and the mounting rod 142 may be integrally formed or threadedly connected, etc., without limitation. The shape of the mounting rod 142 may be rod-shaped, without limitation, and the mounting rod 142 may connect to the rod 300. The variable angle support mechanism 100 has a fairing 150, which can be fixed to the inner wall of the wind tunnel device 400 and at least covers the transmission part 141. The outer surface of the fairing 150 may be smooth and continuous, and it has a more regular outer surface, which further avoids the airflow being disturbed by the irregular structure of the transmission part 141, improves the test stability, and increases the driving range of the variable angle support mechanism 100. Of course, due to the position of the adjusting rod 300, other parts of the variable angle support mechanism 100 will also extend into the wind tunnel device 400. The fairing 150 can still cover them to prevent them from disturbing the airflow inside the wind tunnel device 400.

[0038] Please see Figure 8 as well as Figure 9 The fairing 150 has an opening 151 through which a mounting rod 142 extends out of the fairing 150. The fairing 150 can be fixed to the inner wall of the wind tunnel device 400, covering the transmission part 141. The opening 151 of the fairing 150 allows at least a portion of the mounting rod 142 to extend out. By covering the transmission part 141, the fairing 150 can significantly reduce the disturbance of the transmission part 141 to the airflow inside the wind tunnel device 400. At the same time, the smooth and flowing surface reduces the resistance of the airflow, ensuring the stability of the flow field and providing a guarantee for the accuracy of test data.

[0039] In one implementation, please refer again. Figure 4 The connecting seat 131 may include a driving part 1314 and a rotating part 1315. A first connecting part 1311 and a second connecting part 1312 are both disposed on the rotating part 1315. The end of the driving part 1314 away from the rotating part 1315 is bent towards the side away from the mounting member 140, and the end of the driving part 1314 away from the rotating part 1315 is connected to a second driving member 132. This arrangement increases the vertical distance between the driving part 1314 and the mounting member 140, allowing the driving part 1314 and the second driving member 132 connected to it to both vertically avoid the rotation path of the mounting member 140. This prevents interference between the driving part 1314 and the mounting member 140 during movement, ensuring that the rotation of the mounting member 140 is unimpeded, and further guaranteeing the smoothness and accuracy of attitude adjustment of the mounting member 140 and the connected rods 300 during wind tunnel testing.

[0040] Understandably, the drive unit 1314 is located on the side of the first connecting part 1311 away from the second connecting part 1312. This arrangement further increases the lateral distance between the drive unit 1314 and the mounting member 140, allowing both the drive unit 1314 and the second drive member 132 connected to the drive unit 1314 to avoid the rotation path of the mounting member 140. Simultaneously, increasing the distance between the drive unit 1314 and the second connecting part 1312 further increases the distance between the second drive member 132 connected to the drive unit 1314 and the second connecting part 1312. This increases the lever arm length of the second drive member 132 driving the mounting member 140, making it easier for the second drive member 132 to drive the mounting member 140, reducing the load pressure on the second drive member 132, and improving the service life of the second drive member 132.

[0041] In the embodiments of this application, please refer to Figure 6 The drive unit 1314 may be provided with a reinforcing structure 133, which may be a reinforcing rib, a bent plate, etc., and is not limited thereto. The drive unit 1314 may include a connected first bent segment 1316 and a second bent segment 1317, which may be a sheet-like structure or a strip-like structure, etc., and is not limited thereto. One end of the second bent segment 1317 is connected to the first bent segment 1316, and the other end extends toward the side away from the mounting member 140 and is connected to the second drive member 132. The reinforcing structure 133 is connected between the first bent segment 1316 and the second bent segment 1317, which can enhance the structural strength between the first bent segment 1316 and the second bent segment 1317, ensuring that the first bent segment 1316 and the second bent segment 1317 are not prone to relative deformation or loosening when transmitting driving force, thereby ensuring that the power of the second drive member 132 can be stably and losslessly transmitted to the connecting seat 131, so as to provide a reliable force transmission foundation.

[0042] Please refer to the previous document. Figure 4The reinforcing structure 133 may include a first reinforcing rib 1331 and a second reinforcing rib 1332. The structures of the first reinforcing rib 1331 and the second reinforcing rib 1332 may be the same or different, and their shapes may be triangular or rectangular, etc., without limitation. The first reinforcing rib 1331 and the second reinforcing rib 1332 are disposed between the first bending section 1316 and the rotating part 1315, and the first reinforcing rib 1331 and the second reinforcing rib 1332 are spaced apart to form an installation space 1333. The installation space 1333 is formed between the first reinforcing rib 1331 and the second reinforcing rib 1332. The bracket 111 extends into the installation space 1333. When the connecting seat 131 is driven by the rotating shaft 123, the bracket 111 can abut against the first reinforcing rib 1331 or the second reinforcing rib 1332 to limit the rotation angle of the connecting seat 131. When the connecting seat 131 is driven to rotate to a predetermined angle by the rotating shaft 123, the bracket 111 will abut against the first reinforcing rib 1331 or the second reinforcing rib 1332, thereby limiting the rotation angle of the connecting seat 131. While strengthening the connection between the first bent section 1316 and the rotating part 1315, the reinforcing rib also restricts rotation, preventing the connecting seat 131 from colliding with other components due to excessive rotation. This ensures the mechanical stability of the structure and improves the safety of wind tunnel testing.

[0043] Understandably, the first reinforcing rib 1331 and the second reinforcing rib 1332 are respectively located on opposite sides of the bracket 111, and the first reinforcing rib 1331 and the second reinforcing rib 1332 are located on the rotation path of the bracket 111. The first reinforcing rib 1331 and the second reinforcing rib 1332 can restrict the rotation of the bracket 111 from two different directions to avoid excessive rotation of the bracket 111 and further improve the safety of use.

[0044] In one implementation, please refer to Figure 3 A mounting structure 143 is provided at the end of the mounting rod 142 away from the transmission part 141. The mounting structure 143 is used to mount a detection device 200 suitable for detecting data information of the rod 300. For example, the data information can be the pressure, aerodynamic load, etc. of the rod 300, and there are no restrictions. The detection device 200 is a wind tunnel strain balance, which can measure the force on the rod 300 by sensing its own strain. The mounting structure 143 can be an external thread or a flange. The detection device 200 is fixed to the mounting structure 143 through a flange connection or threaded connection, so that the detection device 200 is coaxial with the mounting rod 142. During the process of the rod 300 being fitted onto the mounting rod 142, the rod 300 is subjected to external force, which causes the detection device 200 to deform. The detection device 200 can detect the force on the rod 300 for subsequent use.

[0045] In other cases, the detection device 200 may include a pressure gauge and a pressure source, with pressure testing holes arranged on the surface of the rod 300. The pressure source can output a standard pressure to the pressure testing holes, and the pressure gauge can measure the pressure change to obtain the pressure value experienced by the rod 300 for subsequent use. Of course, the detection device 200 can also be other devices, which will not be described or listed in this application.

[0046] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0047] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A variable-angle support mechanism for wind tunnel force measurement tests on slender rods, characterized in that, The variable angle support mechanism includes a base, a deflection mechanism, a pitch mechanism, and mounting components, wherein: The deflection mechanism and the pitch mechanism are connected by a drive, one of the deflection mechanism and the pitch mechanism is connected to the base, and the other is connected to the mounting component. The mounting component is used to extend into the wind tunnel device and connect to the end of the rod. The deflection mechanism includes a first driving member, a rocker arm, and a rotating shaft. The first driving member is fixed to the base or the pitch mechanism. One end of the rocker arm is connected to the first driving member, and the other end is connected to the rotating shaft. The first driving member drives the rocker arm to deflect, thereby driving the rotating shaft and causing the mounting member to tilt relative to the base about a first rotation axis. The pitch mechanism can drive the mounting member to tilt relative to the base about a second rotation axis, wherein the first rotation axis and the second rotation axis intersect. The deflection mechanism is mounted on the base, and the pitch mechanism is drivenly connected to the mounting member. The pitch mechanism includes a connecting seat and a second driving member. The connecting seat includes a first connecting part and a second connecting part connected together. The base has a bracket. The rotating shaft is rotatably mounted on the bracket and connected to the first connecting part. The mounting member is rotatably mounted on the second connecting part. The second driving member is drivenly connected to the connecting seat and the mounting member. The second driving member pushes the mounting member to tilt it around the second rotation axis. The bracket has a first through hole, and the rotating shaft passes through the first through hole. One end of the rocker arm is drivenly connected to the rotating shaft, and the other end extends away from the second connecting part and is connected to the first driving member. The second connecting part has a second through hole, and the mounting member has a rotating shaft, which is rotatably mounted in the second through hole.

2. The variable angle support mechanism according to claim 1, characterized in that, The two opposite ends of the rotating shaft are rotatably fixed on the bracket by bearings; And / or, along the second rotation axis, the first drive member and the rotation axis are spaced apart.

3. The variable angle support mechanism according to claim 2, characterized in that, The base is mounted outside the wind tunnel device. The mounting component includes a connected transmission part and a mounting rod. The variable angle support mechanism has a fairing. The fairing can be fixed to the inner wall of the wind tunnel device and at least covers the transmission part. The fairing has an opening, and the mounting rod extends out of the fairing through the opening.

4. The variable angle support mechanism according to claim 3, characterized in that, The end of the mounting rod away from the transmission part is provided with a mounting structure, which is used to install a detection device suitable for detecting the data information of the rod.

5. The variable angle support mechanism according to claim 1, characterized in that, The connector includes a driving part and a rotating part. The first connecting part and the second connecting part are both disposed on the rotating part. The end of the driving part away from the rotating part is bent toward the side away from the mounting member. The end of the driving part away from the rotating part is connected to the second driving member.

6. The variable angle support mechanism according to claim 5, characterized in that, The driving part is provided with a reinforcing structure. The driving part includes a first bent section and a second bent section connected together. The first bent section is connected to the rotating part. One end of the second bent section is connected to the first bent section and the other end is connected to the second driving member. The reinforcing structure is connected between the first bent section and the second bent section.

7. The variable angle support mechanism according to claim 6, characterized in that, The reinforcing structure includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib and the second reinforcing rib are disposed between the first bent section and the rotating part. The first reinforcing rib and the second reinforcing rib are spaced apart and form an installation space. The bracket extends into the installation space. When the connecting seat is driven by the rotating shaft, the bracket can abut against the first reinforcing rib or the second reinforcing rib to limit the rotation angle of the connecting seat. And / or, the driving part is located on the side of the first connecting part away from the second connecting part.

8. The variable angle support mechanism according to any one of claims 1-7, characterized in that, The mounting component is a hollow rod-shaped structure.

9. The variable angle support mechanism according to any one of claims 1-7, characterized in that, The rocker arm and the rotating shaft are fixedly connected by screws.

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