Wing model lift force testing device

Abstract

The utility model relates to the technical field of model testing, and discloses a wing model lift force testing device, which comprises a base and a side plate, and the side plate is fixedly arranged above the base. A rotary knob is rotatably mounted in the base, a threaded rod is arranged in the base, a limiting plate is movably mounted at the top of the inner side of the threaded rod, and a threaded rod is fixedly mounted at the bottom of the limiting plate. The rotary knob is rotated clockwise to drive the threaded rod, the movable plate and the sealing block to move downwards, so that the sealing block enters the sealing ring and exhausts air in the suction cup to enable the suction cup to deform, the device is fixed, and then the device can be moved. And the device is fixed, instability caused by fixing through a fixing rope is avoided, and therefore the working efficiency of the device and the stability of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of model testing technology, and more specifically, to a wing model lift testing device. Background Technology

[0002] Aircraft wing models are important tools in the aerospace field for studying the aerodynamic characteristics and load-bearing capacity of aircraft wings. They simulate the shape and structure of real airfoils and can be used for experimental analysis, numerical simulation, and educational demonstrations.

[0003] When lift testing of an airfoil model is required, an airfoil model testing device is needed. For example, Chinese Patent Publication No. CN222144476U proposes an airfoil model lift testing device, which includes a strain gauge body 1 and an L-shaped fixing plate 11. The fixing plate 11 includes a horizontal section 12 and a vertical section 13 fixedly connected to one side of the upper end of the horizontal section 12. The strain gauge body 1 is disposed on one side of the outer wall of the fixing plate 11, and a fixing hole 16 is opened in the middle of the outer wall of the vertical section 13. A fixing seat 17 extending out of the rear end of the fixing hole 16 is detachably connected inside the fixing plate 11. When fixing the device body, a fixing rope is passed through the fixing groove 14 above the fixing plate 11 for fixation. However, after fixing the device with the fixing rope, the device will still move a distance, and the fixing rope may loosen, which will lead to unstable fixing of the device. Therefore, it is necessary to modify and optimize it. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this utility model provides a wing model lift testing device, which has the advantages of good stability and avoidance of entanglement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wing model lift testing device, comprising a base and a side plate, wherein the side plate is fixedly disposed above the base;

[0006] A knob is rotatably mounted inside the base. A limiting plate is movably mounted on the top inner side of the knob. A threaded rod is fixedly mounted on the bottom of the limiting plate. The bottom of the threaded rod passes through the upper and lower sides of the knob and is fixedly mounted on a movable plate. A sealing block is fixedly mounted on the bottom of the movable plate. A connecting cylinder is fixedly mounted on the bottom of the base. An air inlet is provided on the side of the connecting cylinder. An iron plate is fixedly mounted on the bottom of the connecting cylinder. A suction cup is fixedly mounted on the bottom of the iron plate. A sealing ring is fixedly fitted inside the iron plate. The bottom of the sealing block passes through the upper and lower sides of the sealing ring and is movably connected to the sealing ring. The knob is threadedly fitted with the threaded rod.

[0007] As a preferred embodiment of this utility model, a connector is fixedly installed on one side of the side plate, one end of the connector passes through the left and right sides of the side plate, a connecting plate is fixedly installed on one side of the connector, a spring is fixedly installed on one side of the connecting plate, and a movable plate is fixedly installed on one end of the spring.

[0008] As a preferred embodiment of this utility model, a connecting rod is rotatably mounted on one side of the connector, a strain gauge is fixedly mounted on the side of the connecting rod, a retaining ring is fixedly mounted on one end of the connecting rod, and a pressure rod is fixedly mounted on one end of the connecting rod inside the connector. A pressure sensor is fixedly mounted on the bottom inside the connector, and the strain gauge and the pressure sensor are electrically connected to the connector.

[0009] As a preferred technical solution of this utility model, a strain gauge control unit is fixedly installed on one side of the side plate, and a connecting line is connected to one side of the strain gauge control unit. One end of the connecting line passes through the left and right sides of the movable plate and the connecting plate and is fixedly connected to the connector.

[0010] As a preferred embodiment of this utility model, a limiting rod is fixedly installed on one side of the connector, and one end of the limiting rod passes through the left and right sides of the movable plate and is movably connected to the movable plate.

[0011] As a preferred embodiment of this utility model, the number of strain gauges is two, and the two strain gauges are evenly distributed on the side of the connecting rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses clockwise rotation of the knob to move the threaded rod, the moving plate, and the sealing block downwards, causing the sealing block to enter the interior of the sealing ring and expelling air from the suction cup, thus deforming the suction cup and fixing the device. When the device needs to be moved, the knob is rotated counterclockwise to move the threaded rod upwards. When the sealing block leaves the interior of the sealing ring, air enters the interior of the suction cup through the air inlet, connecting cylinder, and sealing ring, allowing the device to be moved. Compared with traditional devices, this device uses the suction cup design to fix the device, avoiding the instability caused by fixing with a rope, thereby improving the working efficiency and stability of the device itself.

[0014] 2. This utility model places and fixes the device inside the wind farm. When the wind farm is started, the connecting line swings. As the connecting line swings, the connection between the connecting line and the connector becomes taut. This causes the movable plate to move and stretch the spring. The spring pulls the movable plate back to restrict the movement of the connecting line. Compared with traditional devices, this device improves the service life of the connecting line by restricting the connecting line and avoids the phenomenon of the connecting line breaking with the connector after long-term use, thereby improving the service life of the connecting line. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a side view of the present invention.

[0017] Figure 3 This utility model Figure 2 A magnified view of part A;

[0018] Figure 4 This is a schematic diagram of the internal structure of the base of this utility model;

[0019] Figure 5 This utility model Figure 4 A magnified view of part B;

[0020] Figure 6 This is a schematic diagram of the strain gauge structure of this utility model.

[0021] In the diagram: 1. Base; 2. Side plate; 3. Knob; 4. Limiting groove; 5. Limiting plate; 6. Threaded rod; 7. Moving plate; 8. Sealing block; 9. Connecting cylinder; 10. Air inlet; 11. Iron plate; 12. Suction cup; 13. Sealing ring; 14. Connector; 15. Connecting rod; 16. Strain gauge; 17. Fixing ring; 18. Pressure rod; 19. Pressure sensor; 20. Connecting plate; 21. Spring; 22. Moving plate; 23. Connecting wire; 24. Strain gauge control unit; 25. Limiting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 6As shown, this utility model provides a wing model lift testing device, including a base 1 and a side plate 2, with the side plate 2 fixedly disposed above the base 1;

[0024] A knob 3 is rotatably installed inside the base 1. A limit groove 4 is opened inside the base 1. A limit plate 5 is movably installed on the top of the inner side of the limit groove 4. A threaded rod 6 is fixedly installed at the bottom of the limit plate 5. The bottom of the threaded rod 6 passes through the upper and lower sides of the knob 3 and is fixedly installed with a movable plate 7. A sealing block 8 is fixedly installed at the bottom of the movable plate 7. A connecting cylinder 9 is fixedly installed at the bottom of the base 1. An air inlet 10 is opened on the side of the connecting cylinder 9. An iron plate 11 is fixedly installed at the bottom of the connecting cylinder 9. A suction cup 12 is fixedly installed at the bottom of the iron plate 11. A sealing ring 13 is fixedly sleeved inside the iron plate 11. The bottom of the sealing block 8 passes through the upper and lower sides of the sealing ring 13 and is movably connected to the sealing ring 13. The knob 3 is threadedly sleeved with the threaded rod 6.

[0025] When the operator uses the device, they first turn the knob 3 clockwise. As the knob 3 rotates, the threaded connection between the knob 3 and the threaded rod 6 causes the threaded rod 6 to move downwards. This downward movement of the threaded rod 6 causes the moving plate 7 to move downwards, which in turn causes the sealing block 8 to move downwards. When the bottom of the sealing block 8 enters the interior of the sealing ring 13, the downward movement of the threaded rod 6 expels the air from the suction cup 12, causing the suction cup 12 to deform and thus fix the device in place. When the device needs to be moved, the operator turns the knob 3 counterclockwise to move the threaded rod 6 upwards, causing the sealing block 8 to move out of the sealing ring 13. Air then enters the connecting cylinder 9 through the air inlet 10, and then through the sealing ring 13 into the suction cup 12. At this point, the device can be moved.

[0026] By rotating the knob 3 clockwise, the threaded rod 6, the moving plate 7, and the sealing block 8 move downwards, causing the sealing block 8 to enter the interior of the sealing ring 13 and expelling the air from the suction cup 12, thus deforming the suction cup 12 and fixing the device. When the device needs to be moved, rotating the knob 3 counterclockwise causes the threaded rod 6 to move upwards. When the sealing block 8 leaves the interior of the sealing ring 13, air enters the interior of the suction cup 12 through the air inlet 10, the connecting cylinder 9, and the sealing ring 13, at which point the device can be moved. Compared with traditional devices, this device uses the design of the suction cup 12 to fix the device, avoiding the instability caused by fixing with a fixing rope, thereby improving the working efficiency and stability of the device itself.

[0027] A connector 14 is fixedly installed on one side of the side plate 2. One end of the connector 14 passes through the left and right sides of the side plate 2. A connecting plate 20 is fixedly installed on one side of the connector 14. A spring 21 is fixedly installed on one side of the connecting plate 20. A movable plate 22 is fixedly installed on one end of the spring 21.

[0028] When the staff uses the device, it is placed inside the wind farm. After the wind farm is set up, the connection line 23 will swing when the wind farm is started. When the connection line 23 swings, the connection between the connection line 23 and the connector 14 will be tightened. This will cause the movable plate 22 to move. As the movable plate 22 moves, the spring 21 will be stretched. At the same time, the spring 21 will also apply a certain pulling force to the movable plate 22, thereby restricting the movement of the connection line 23.

[0029] By placing and fixing the device inside the wind farm, the wind farm starts up, causing the connecting line 23 to swing. As the connecting line 23 swings, the connection between the connecting line 23 and the connector 14 becomes taut. This causes the movable plate 22 to move and stretch the spring 21. The spring 21 pulls the movable plate 22 back to restrict the movement of the connecting line 23. Compared with traditional devices, this device improves the service life of the connecting line 23 by restricting the connecting line 23, and avoids the phenomenon of the connecting line 23 breaking with the connector 14 after long-term use, thereby improving the service life of the connecting line 23.

[0030] A connecting rod 15 is rotatably mounted on one side of the connector 14, a strain gauge 16 is fixedly mounted on the side of the connecting rod 15, a retaining ring 17 is fixedly mounted on one end of the connecting rod 15, and a pressure rod 18 is fixedly mounted on one end of the connecting rod 15 inside the connector 14. A pressure sensor 19 is fixedly mounted on the bottom inside the connector 14. The strain gauge 16 and the pressure sensor 19 are electrically connected to the connector 14.

[0031] By connecting and fixing the wing model to be tested with the fixing ring 17, the wing model will swing during the test, thereby causing the fixing ring 17 and the connecting rod 15 to rotate. As the connecting rod 15 rotates, the pressure rod 18 will rotate, causing the pressure rod 18 to make compression contact with the pressure sensor 19, thereby transmitting data through the fixing ring 17 and the pressure rod 18.

[0032] Among them, a strain gauge control unit 24 is fixedly installed on one side of the side plate 2, and a connecting line 23 is connected to one side of the strain gauge control unit 24. One end of the connecting line 23 passes through the left and right sides of the movable plate 22 and the connecting plate 20 and is fixedly connected to the connector 14.

[0033] The integrated strain gauge control unit 24 is designed to control the operation of the device and display the data transmitted by the fixed ring 17 and the pressure rod 18.

[0034] Among them, a limiting rod 25 is fixedly installed on one side of the connector 14, and one end of the limiting rod 25 passes through the left and right sides of the movable plate 22 and is movably connected to the movable plate 22.

[0035] The design of the connecting rod 15 restricts the movement direction of the movable plate 22, preventing tilting.

[0036] There are two strain gauges 16, which are evenly distributed on the side of the connecting rod 15.

[0037] By using two strain gauges 16, the deformation data is transmitted to the strain gauge control unit 24 via the connecting line 23.

[0038] Working principle and usage process of this utility model:

[0039] When the operator uses the device, they first turn the knob 3 clockwise. As the knob 3 rotates, the threaded connection between the knob 3 and the threaded rod 6 causes the threaded rod 6 to move downwards. This downward movement of the threaded rod 6 causes the moving plate 7 to move downwards, which in turn causes the sealing block 8 to move downwards. When the bottom of the sealing block 8 enters the interior of the sealing ring 13, the downward movement of the threaded rod 6 expels the air from the suction cup 12, causing the suction cup 12 to deform and thus fix the device in place. When the device needs to be moved, the operator turns the knob 3 counterclockwise to move the threaded rod 6 upwards, causing the sealing block 8 to move out of the sealing ring 13. Air then enters the connecting cylinder 9 through the air inlet 10, and then through the sealing ring 13 into the suction cup 12. At this point, the device can be moved.

[0040] When the staff uses the device, it is placed inside the wind farm. After the wind farm is set up, the connection line 23 will swing when the wind farm is started. When the connection line 23 swings, the connection between the connection line 23 and the connector 14 will be tightened. This will cause the movable plate 22 to move. As the movable plate 22 moves, the spring 21 will be stretched. At the same time, the spring 21 will also apply a certain pulling force to the movable plate 22, thereby restricting the movement of the connection line 23.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lift testing device for an airfoil model, comprising a base (1) and side plates (2), characterized in that: The side plate (2) is fixedly installed above the base (1); A knob (3) is rotatably installed inside the base (1). A limiting groove (4) is opened inside the base (1). A limiting plate (5) is movably installed on the top of the inner side of the limiting groove (4). A threaded rod (6) is fixedly installed at the bottom of the limiting plate (5). The bottom of the threaded rod (6) passes through the upper and lower sides of the knob (3) and is fixedly installed with a movable plate (7). A sealing block (8) is fixedly installed at the bottom of the movable plate (7). A connecting cylinder (9) is fixedly installed at the bottom of the base (1). An air inlet (10) is opened on the side of the connecting cylinder (9). An iron plate (11) is fixedly installed at the bottom of the connecting cylinder (9). A suction cup (12) is fixedly installed at the bottom of the iron plate (11). A sealing ring (13) is fixedly sleeved inside the iron plate (11). The bottom of the sealing block (8) passes through the upper and lower sides of the sealing ring (13) and is movably connected to the sealing ring (13). The knob (3) is threadedly sleeved with the threaded rod (6).

2. The wing model lift testing device according to claim 1, characterized in that: A connector (14) is fixedly installed on one side of the side plate (2). One end of the connector (14) passes through the left and right sides of the side plate (2). A connecting plate (20) is fixedly installed on one side of the connector (14). A spring (21) is fixedly installed on one side of the connecting plate (20). A movable plate (22) is fixedly installed on one end of the spring (21).

3. The wing model lift testing device according to claim 2, characterized in that: A connecting rod (15) is rotatably mounted on one side of the connector (14). A strain gauge (16) is fixedly mounted on the side of the connecting rod (15). A retaining ring (17) is fixedly mounted on one end of the connecting rod (15). One end of the connecting rod (15) extends into the interior of the connector (14) and is fixedly mounted with a pressure rod (18). A pressure sensor (19) is fixedly mounted on the bottom of the inner side of the connector (14). The strain gauge (16) and the pressure sensor (19) are electrically connected to the connector (14).

4. The wing model lift testing device according to claim 1, characterized in that: A strain gauge control unit (24) is fixedly installed on one side of the side plate (2). A connecting line (23) is connected to one side of the strain gauge control unit (24). One end of the connecting line (23) passes through the left and right sides of the movable plate (22) and the connecting plate (20) and is fixedly connected to the connector (14).

5. The wing model lift testing device according to claim 2, characterized in that: A limiting rod (25) is fixedly installed on one side of the connector (14), and one end of the limiting rod (25) passes through the left and right sides of the movable plate (22) and is movably connected to the movable plate (22).

6. The wing model lift testing device according to claim 3, characterized in that: The number of strain gauges (16) is two, and the two strain gauges (16) are evenly distributed on the side of the connecting rod (15).

Images