A wind tunnel airflow stabilization device in the contraction section

Abstract

This invention belongs to the technical field of wind tunnel contraction section and discloses a wind tunnel contraction section airflow stabilization device, including a slide rail base, on which multiple assembly units and a wind tunnel unit are arranged. The wind tunnel unit includes a rectifier tube, a contraction tube, and an experimental tube connected in sequence. The contraction tube is located between the rectifier tube and the experimental tube. An integral connecting ring is fixedly arranged at both ends of the rectifier tube, both ends of the contraction tube, and both ends of the experimental tube. The rectifier tube and the contraction tube, as well as the contraction tube and the experimental tube, are fixed by the assembly units. The assembly unit includes a base, with a lower positioning mechanism arranged in the middle of the base and side positioning mechanisms arranged at both ends of the base. In this invention, through the cooperation of the self-positioning components, the shell, and the cylinder, and with the help of the gravity of the wind tunnel unit, each self-positioning component is made to fit against the outside of the connecting ring in the wind tunnel unit. Through the interconnection of the shell, the supporting force of each self-positioning component on the connecting ring is equal.

Description

Technical Field

[0001] This invention belongs to the technical field of wind tunnel contraction section, specifically a wind tunnel contraction section airflow stabilization device. Background Technology

[0002] When assembling a wind tunnel, the various parts of the wind tunnel must first be separated and then hoisted by external lifting equipment. After multiple operations by the operators, the various components of the wind tunnel can be connected together. The cross-sectional areas at both ends of the wind tunnel contraction section are different, so as to control the flow velocity and flow field requirements. However, during the assembly process, the existing wind tunnel contraction section is relatively cumbersome and requires multiple adjustments, resulting in technical problems that are not convenient. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a wind tunnel contraction section airflow stabilization device, which effectively solves the problem that the existing wind tunnel contraction section is cumbersome to assemble and requires multiple adjustments, resulting in inconvenience.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a wind tunnel contraction section airflow stabilization device, comprising a slide rail base, on which multiple assembly units and a wind tunnel unit are arranged. The wind tunnel unit includes a rectifier tube, a contraction tube, and an experimental tube connected in sequence. The contraction tube is located between the rectifier tube and the experimental tube. Integrated connecting rings are fixedly provided at both ends of the rectifier tube, both ends of the contraction tube, and both ends of the experimental tube. The rectifier tube and the contraction tube, as well as the contraction tube and the experimental tube, are fixed together by the assembly units. The assembly unit includes a base, with a lower positioning mechanism in the middle of the base and side positioning mechanisms at both ends of the base. The mechanism includes a lower positioning component and a lifting component for raising and lowering the lower positioning component, and a side positioning component and a power component for driving the side positioning component. The structure of the lower positioning component is the same as that of the side positioning component. The lower positioning component includes a support plate with an opening slot and a mounting slot inside. The opening slot is located above the mounting slot. Multiple self-positioning components are arranged inside the opening slot. A housing is fixedly arranged inside the mounting slot. Multiple cylinders are fixedly arranged inside the housing. The interior of each cylinder is connected to the housing. Each cylinder is arranged in a one-to-one correspondence with a self-positioning component.

[0005] Preferably, the self-positioning component includes a top plate, a bottom plate, a return spring, a connecting rod, a piston, and a support spring. The top plate and the bottom plate are hinged together and connected by symmetrically arranged return springs. The bottom plate is fixedly connected to the piston by the connecting rod. The piston and the support spring are both movably disposed within the cylinder, with the support spring located below the piston. The support plate has a rod hole for the connecting rod to pass through, and the housing has a circular hole communicating with the cylinder.

[0006] Preferably, the opening slot has symmetrically formed top slots inside, and side push plates are slidably arranged in both top slots. The support plate has multiple cylindrical slots and multiple connecting slots. The top slots are connected to the connecting slots in sequence through the cylindrical slots. The connecting slots are connected to the shell through conduits. The top slots are provided with sliding columns, sliding rods and telescopic springs. The sliding columns are slidably arranged in the top slots and are fixed to the side push plates through the sliding rods. The telescopic springs are wrapped around the sliding rods.

[0007] Preferably, the side of the side push plate closest to the support plate is a vertical surface, and the upper surface of the side push plate is an inclined surface.

[0008] Preferably, the lifting assembly includes a rotating rod, a screw, and two guide rods, wherein the rotating rod is fixedly mounted on the screw, the screw is rotatably mounted on the support plate, the screw is threadedly engaged with a screw hole on the base, and the two guide rods are both fixedly mounted on the support plate and are slidably engaged with rod holes on the base.

[0009] Preferably, the power assembly includes an outer support, an inner support, an electric push rod, and a power frame, wherein the outer support and the inner support are both fixedly mounted on the base, the electric push rod is hinged to the outer support, the output end of the electric push rod is hinged to the power frame, the power frame is hinged to the inner support, and the side positioning component is mounted on the free end of the power frame.

[0010] Preferably, the slide rail seat has symmetrically formed grooves, and the base has symmetrically fixed sliders. The sliders slide in conjunction with the grooves. Bolts and washers are provided below the slide rail seat. The bolts pass through the washers and grooves in sequence and then engage with the threaded holes on the sliders.

[0011] Preferably, both the connecting ring on the rectifier tube and the connecting ring on the contraction tube are provided with receiving grooves, and a sealing ring is provided between the two receiving grooves. The inside of the sealing ring forms two inner cavities, and pipe joints with solenoid valves are fixedly connected to the outside of the two inner cavities. Both pipe joints are connected to the inside of the shell through connecting pipes.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. During operation, the lower positioning mechanism and the side positioning mechanism can quickly complete the assembly process of the wind tunnel unit, thereby reducing manual operation during assembly.

[0014] 2. During operation, through the cooperation of the self-positioning components, shell, and cylinder, the gravity of the wind tunnel unit can be used to ensure that each self-positioning component fits against the outside of the connecting ring inside the wind tunnel unit. Furthermore, through the interconnection of the shell, the supporting force of each self-positioning component on the connecting ring is equal, thereby avoiding damage to the support due to uneven force.

[0015] 3. During operation, the combination of the top plate, bottom plate, and return spring ensures that the top plate of each self-positioning component is tightly fitted to the outside of the connecting ring, thereby increasing the effective contact area between the top plate and the connecting ring, further reducing the squeezing force between them, and playing a protective role during assembly.

[0016] 4. During operation, the side push plate can push the connecting ring with the gravity of the wind tunnel unit during assembly, so that the adjacent connecting rings fit more tightly and improve the sealing performance after assembly.

[0017] 5. During operation, the two inner cavities within the sealing ring maintain a stable pressure by utilizing the gravity of the wind tunnel unit, thus achieving a good sealing effect. Furthermore, if one of the inner cavities is damaged due to prolonged contact with the receiving groove, closing the solenoid valve on the corresponding pipe joint will transfer all the pressure to the other inner cavity, allowing it to continue providing a sealing effect. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the airflow stabilization device in the contraction section of a wind tunnel according to the present invention;

[0021] Figure 2 This is a schematic diagram of the wind tunnel unit structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the base mounting structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the support plate mounting structure of the present invention;

[0024] Figure 5This is a schematic diagram of the three-dimensional structure of the support plate of the present invention;

[0025] Figure 6 This is a schematic cross-sectional view of the support plate structure of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B;

[0027] Figure 8 This is a cross-sectional structural diagram of the wind tunnel unit of the present invention;

[0028] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C;

[0029] Figure 10 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0030] In the diagram: 1. Slide rail seat; 2. Rectifier tube; 3. Contraction tube; 4. Experimental tube; 5. Connecting ring; 6. Base; 7. Support plate; 8. Opening slot; 9. Mounting slot; 10. Shell; 11. Cylinder; 12. Top plate; 13. Bottom plate; 14. Return spring; 15. Connecting rod; 16. Piston; 17. Support spring; 18. Top groove; 19. Side push plate; 20. Cylindrical groove; 21. Connecting groove; 22. Sliding column; 23. Sliding rod; 24. Rotating rod; 25. Screw; 26. Guide rod; 27. Outer support; 28. Inner support; 29. ​​Electric push rod; 30. Power frame; 31. Slide groove; 32. Slider; 33. Bolt; 34. Gasket; 35. Receiving groove; 36. Sealing ring; 37. Inner cavity; 38. Pipe joint; 39. Connecting pipe; 40. Telescopic spring. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Depend on Figure 1-10This invention relates to an airflow stabilization device for the contraction section of a wind tunnel. To address the problem that existing wind tunnel contraction sections are cumbersome to assemble and require multiple adjustments, resulting in inconvenience, the device includes a slide rail base 1. The slide rail base 1 is equipped with multiple assembly units and a wind tunnel unit. The wind tunnel unit includes a rectifier tube 2, a contraction tube 3, and an experimental tube 4 connected sequentially. The contraction tube 3 is located between the rectifier tube 2 and the experimental tube 4. Integrated connecting rings 5 ​​are fixedly installed at both ends of the rectifier tube 2, both ends of the contraction tube 3, and both ends of the experimental tube 4. The rectifier tube 2 and the contraction tube 3, as well as the contraction tube 3 and the experimental tube 4, are fixed together by the assembly units. Each assembly unit includes a base 6, with a lower... The positioning mechanism includes side positioning mechanisms at both ends of the base 6. The lower positioning mechanism includes a lower positioning component and a lifting component for raising and lowering the lower positioning component. The side positioning mechanism includes a side positioning component and a power component for driving the side positioning component. The structure of the lower positioning component is the same as that of the side positioning component. The lower positioning component includes a support plate 7. The support plate 7 has an opening slot 8 and a mounting slot 9 inside. The opening slot 8 is located above the mounting slot 9. Multiple self-positioning components are arranged inside the opening slot 8. A housing 10 is fixedly arranged inside the mounting slot 9. Multiple cylinders 11 are fixedly arranged inside the housing 10. The interior of each cylinder 11 is connected to the housing 10. Each cylinder 11 is arranged in a one-to-one correspondence with a self-positioning component.

[0033] With this design, during use, the wind tunnel unit is placed in the assembly unit on the slide rail seat 1 using external hoisting equipment. This positions the wind tunnel unit above the lower positioning component within the lower positioning mechanism of the assembly unit. The lower positioning component is then vertically adjusted using a lifting assembly to position the wind tunnel unit in the required installation position. Subsequently, a power assembly drives the side positioning component to move, docking and securing the wind tunnel unit from the side. The specific working process of the lower positioning component is as follows:

[0034] When the connecting ring 5 on the contraction tube 3 and the connecting ring 5 on the rectifier tube 2 are placed together in the opening groove 8 in the support plate 7, they will be squeezed by gravity in the multiple self-positioning components in the opening groove 8. After being compressed, the multiple self-positioning components move into the cylinder 11 on the housing 10, so that the liquid or gas in the cylinder 11 enters the interior of the housing 10. Since the multiple cylinders 11 are connected through the housing 10, the supporting force of each self-positioning component on the corresponding connecting ring 5 can be equal, avoiding damage to the wind tunnel unit due to uneven force, and playing a protective role.

[0035] Specifically, considering that the connecting ring 5 is arc-shaped, its contact area with the self-positioning component is extremely limited, resulting in excessive squeezing force at the contact point, which can easily damage the connecting ring 5. To solve this technical problem, the self-positioning component includes a top plate 12, a bottom plate 13, a return spring 14, a connecting rod 15, a piston 16, and a support spring 17. The top plate 12 and the bottom plate 13 are hinged together and connected by symmetrically arranged return springs 14. The bottom plate 13 is fixedly connected to the piston 16 by the connecting rod 15. The piston 16 and the support spring 17 are both movably arranged inside the cylinder 11, with the support spring 17 located below the piston 16. The support plate 7 has a rod hole for the connecting rod 15 to pass through, and the housing 10 has a circular hole communicating with the cylinder 11.

[0036] With this design, when the connecting ring 5 is placed on the top plate 12, under the action of gravity, the top plate 12 drives the piston 16 to move through the bottom plate 13 and the connecting rod 15 in sequence. After the piston 16 slides in the cylinder 11, it squeezes the liquid or gas in the cylinder 11 so that the liquid or gas enters the interior of the shell 10.

[0037] It should be noted that the upper surface of the top plate 12 can be set into an arc shape, and a flexible pad can be set on the upper surface of the top plate 12 to increase the effective contact area between the top plate 12 and the connecting ring 5. This increases the contact area and reduces the squeezing force on the connecting ring 5, thus providing protection. Since the top plate 12 can rotate around the bottom plate 13 and maintain its initial state through the return spring 14, after contacting the connecting ring 5 with the other self-positioning components on the side, the top plate 12 in the self-positioning components on both sides can rotate and fit against the connecting ring 5 to ensure the effective contact area.

[0038] Furthermore, in order to make the two adjacent connecting rings 5 ​​fit more tightly during assembly, top grooves 18 are symmetrically formed inside the opening groove 8. Side push plates 19 are slidably arranged in both top grooves 18. Multiple cylindrical grooves 20 and multiple connecting grooves 21 are opened on the support plate 7. The top grooves 18 are connected to the connecting grooves 21 in sequence through the cylindrical grooves 20. The connecting grooves 21 are connected to the shell 10 through the conduit. The top grooves 18 are provided with sliding columns 22, sliding rods 23 and telescopic springs 40. The sliding columns 22 are slidably arranged in the top grooves 18. The sliding columns 22 are fixed to the side push plates 19 through the sliding rods 23. The telescopic springs 40 are wrapped around the sliding rods 23.

[0039] With this design, when the liquid or gas inside the housing 10 is pressurized and flows, it can sequentially pass through the conduit, the connecting groove 21, and enter the interior of the cylindrical groove 20. Under the transmission of pressure, the sliding column 22 drives the side push plate 19 to move through the sliding rod 23, and pushes the connecting ring 5 through the side push plate 19 so that the two adjacent connecting rings 5 ​​fit together tightly.

[0040] Specifically, the side of the side push plate 19 closest to the support plate 7 is a vertical surface, and the upper surface of the side push plate 19 is an inclined surface. This design, through the setting of the inclined surface, can guide the connecting ring 5, making it easier for the connecting ring 5 to enter the interior of the opening groove 8.

[0041] Specifically, the lifting assembly includes a rotating rod 24, a screw 25, and two guide rods 26. The rotating rod 24 is fixedly mounted on the screw 25, and the screw 25 is rotatably mounted on the support plate 7. The screw 25 is threadedly engaged with the screw hole on the base 6. Both guide rods 26 are fixedly mounted on the support plate 7, and both guide rods 26 are slidably engaged with the rod hole on the base 6.

[0042] With this design, the screw 25 is driven to move by the rotating rod 24. Under the limiting guidance of the guide rod 26, the screw 25 drives the support plate 7 to move through the thread, so as to adjust the height of the support plate 7 to meet the needs of actual assembly.

[0043] Specifically, the power assembly includes an outer support 27, an inner support 28, an electric push rod 29, and a power frame 30. The outer support 27 and the inner support 28 are both fixedly mounted on the base 6. The electric push rod 29 is hinged to the outer support 27. The output end of the electric push rod 29 is hinged to the power frame 30. The power frame 30 is hinged to the inner support 28. The side positioning component is mounted on the free end of the power frame 30.

[0044] With this design, the electric push rod 29 drives the power frame 30 to move, causing the power frame 30 to rotate around the inner support 28. The side positioning components on the power frame 30 limit and fix the two adjacent connecting rings 5 ​​on the side.

[0045] Specifically, the slide rail seat 1 has symmetrically formed slide grooves 31, and the base 6 has symmetrically fixed sliders 32. The sliders 32 slide in conjunction with the slide grooves 31. The slide rail seat 1 has bolts 33 and washers 34 below it. The bolts 33 pass through the washers 34 and the slide grooves 31 in sequence and then engage with the threaded holes on the sliders 32.

[0046] With this design, the base 6 can be pushed according to actual needs during use, so that the slider 32 on the base 6 can slide in the groove 31 on the slide rail seat 1, so as to adjust the position of the base 6 according to actual needs. After adjustment, the slider 32 can be locked by bolts 33 and washers 34.

[0047] Furthermore, considering that conventional sealing gaskets are all elastic structures, their sealing performance will decrease after long-term use. In order to solve this technical problem, receiving grooves 35 are provided on the connecting ring 5 on the rectifier tube 2 and the connecting ring 5 on the shrink tube 3. A sealing ring 36 is provided between the two receiving grooves 35. The interior of the sealing ring 36 forms two inner cavities 37. A pipe joint 38 with a solenoid valve is fixedly connected to the outside of the two inner cavities 37. The two pipe joints 38 are connected to the interior of the housing 10 through the connecting pipe 39.

[0048] This design utilizes the gravity of the wind tunnel unit to allow the liquid or gas inside the housing 10 to sequentially enter the interior of the two inner cavities 37 through the connecting pipe 39 and the two pipe joints 38. This maintains a stable pressure inside the inner cavities 37, ensuring that the sealing ring 36 fits tightly against the receiving groove 35, achieving a good sealing effect. Furthermore, sensors can be installed inside the two inner cavities 37. If one inner cavity 37 is damaged due to prolonged contact with the receiving groove 35, the solenoid valve on the corresponding pipe joint 38 will be closed. At this time, all the pressure will be transferred to the interior of the other inner cavity 37, thus continuing the sealing effect through the other inner cavity 37.

[0049] 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.

[0050] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wind tunnel airflow stabilization device for the contraction section, comprising a slide rail base (1), on which multiple assembly units and a wind tunnel unit are arranged, wherein the wind tunnel unit comprises a rectifier tube (2), a contraction tube (3), and an experimental tube (4) connected in sequence, the contraction tube (3) being located between the rectifier tube (2) and the experimental tube (4), and integral connecting rings (5) being fixedly arranged at both ends of the rectifier tube (2), both ends of the contraction tube (3), and both ends of the experimental tube (4), and the rectifier tube (2) and the contraction tube (3) and the contraction tube (3) and the experimental tube (4) being fixed by the assembly units, characterized in that, The assembly unit includes a base (6), a lower positioning mechanism is provided in the middle of the base (6), and side positioning mechanisms are provided at both ends of the base (6); wherein the lower positioning mechanism includes a lower positioning component and a lifting component for lifting the lower positioning component, and the side positioning mechanism includes a side positioning component and a power component for driving the side positioning component, and the structure of the lower positioning component is the same as that of the side positioning component; wherein the lower positioning component includes a support plate (7), the support plate (7) is provided with an opening slot (8) and a mounting slot (9) inside, the opening slot (8) is located above the mounting slot (9), the opening slot (8) is provided with multiple self-positioning components inside, the mounting slot (9) is fixedly provided with a housing (10), the housing (10) is fixedly provided with multiple cylinders (11), the interior of each cylinder (11) is connected to the housing (10), and the cylinders (11) are corresponding to the self-positioning components one by one; The self-positioning component includes a top plate (12), a bottom plate (13), a reset spring (14), a connecting rod (15), a piston (16), and a support spring (17). The top plate (12) and the bottom plate (13) are hinged together, and the top plate (12) and the bottom plate (13) are connected by symmetrically arranged reset springs (14). The bottom plate (13) is fixedly connected to the piston (16) by the connecting rod (15). The piston (16) and the support spring (17) are both movably arranged inside the cylinder (11), and the support spring (17) is located below the piston (16). The support plate (7) has a rod hole for the connecting rod (15) to pass through, and the housing (10) has a round hole communicating with the cylinder (11).

2. The airflow stabilization device for the contraction section of a wind tunnel according to claim 1, characterized in that: The opening slot (8) has a top slot (18) symmetrically formed inside. A side push plate (19) is slidably arranged in both top slots (18). A number of cylindrical slots (20) and a number of connecting slots (21) are opened on the support plate (7). The top slot (18) is connected to the connecting slot (21) in sequence through the cylindrical slots (20). The connecting slot (21) is connected to the shell (10) through the conduit. A sliding column (22), a sliding rod (23) and a telescopic spring (40) are arranged in the top slot (18). The sliding column (22) is slidably arranged in the top slot (18). The sliding column (22) is fixedly arranged with the side push plate (19) through the sliding rod (23). The telescopic spring (40) is wrapped around the sliding rod (23).

3. The airflow stabilization device for the contraction section of a wind tunnel according to claim 2, characterized in that: The side of the push plate (19) near the support plate (7) is a vertical surface, and the upper surface of the push plate (19) is an inclined surface.

4. The airflow stabilization device for the contraction section of a wind tunnel according to claim 1, characterized in that: The lifting assembly includes a rotating rod (24), a screw (25), and two guide rods (26). The rotating rod (24) is fixedly mounted on the screw (25), and the screw (25) is rotatably mounted on the support plate (7). The screw (25) is threadedly engaged with the screw hole on the base (6). The two guide rods (26) are both fixedly mounted on the support plate (7), and both guide rods (26) are slidably engaged with the rod hole on the base (6).

5. The airflow stabilization device for the contraction section of a wind tunnel according to claim 1, characterized in that: The power assembly includes an outer support (27), an inner support (28), an electric push rod (29), and a power frame (30). The outer support (27) and the inner support (28) are both fixedly mounted on the base (6). The electric push rod (29) is hinged to the outer support (27). The output end of the electric push rod (29) is hinged to the power frame (30). The power frame (30) is hinged to the inner support (28). The side positioning component is mounted on the free end of the power frame (30).

6. The airflow stabilization device for the contraction section of a wind tunnel according to claim 1, characterized in that: The slide rail seat (1) has symmetrically formed grooves (31), and the base (6) has symmetrically fixed sliders (32). The sliders (32) slide in cooperation with the grooves (31). The slide rail seat (1) has bolts (33) and washers (34) below it. The bolts (33) pass through the washers (34) and the grooves (31) in sequence and then engage with the screw holes on the sliders (32).

7. The airflow stabilization device for the contraction section of a wind tunnel according to claim 1, characterized in that: The connecting ring (5) on the rectifier tube (2) and the connecting ring (5) on the shrink tube (3) are provided with receiving grooves (35). A sealing ring (36) is provided between the two receiving grooves (35). The sealing ring (36) forms two inner cavities (37). A pipe joint (38) with a solenoid valve is fixedly connected to the outside of the two inner cavities (37). The two pipe joints (38) are connected to the inside of the shell (10) through the connecting pipe (39).

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