A wind tunnel release test mechanism and an external store separation and release method

Abstract

A wind tunnel release test mechanism and an external store separation and release method belong to the field of wind tunnel tests. It includes a wing, a fixed bearing seat, a front hook, a rotating shaft, a head hook, an external store, a tail hook, a locking device and an unlocking device. The rotating shaft is installed on the wing through the fixed bearing seat and the support bearing seat. A locking device is installed on the rotating shaft, and the locking device and the unlocking device are installed on the wing. The locking device restricts the rotation of the rotating shaft, and the unlocking device releases the rotation restriction of the locking device on the rotating shaft. A front hook is fixedly installed on the rotating shaft, a tail hook rotating shaft seat is installed on the wing, a head hook and a tail hook are respectively arranged on the front and rear sides of the external store, the U-shaped groove of the tail hook is rotationally matched with the tail hook rotating shaft seat, and the head hook is clamped and connected with the front hook. It solves the problems that the external store model can be freely released, the separation angle is accurate, and the release mechanism damages the wing surface less. It can realize the reliable suspension of the external store model during the establishment of the wind tunnel flow field, and can realize the unlocking and release of the external store.

Description

Technical Field

[0001] The present invention relates to a wind tunnel release test mechanism and an external store separation and release method, belonging to the field of wind tunnel tests. Background Art

[0002] The release test refers to a special wind tunnel test in which a mounted object model is separated from an aircraft model in a wind tunnel, and a high-speed camera or other video measurement technologies are used to record the separation image of the mounted object. In the test, the suspension-separation of the mounted object model is realized by a release mechanism. And in the release test, it is required that the mounted object can complete the separation from the aircraft model at the required separation position, with the required separation angular velocity and linear velocity. Due to the size limitation of the wind tunnel test section, the release test of the aircraft-missile separation type usually uses a scaled model. The internal structure and space of the aircraft model are very different from those of the real aircraft, and the initial linear velocity, angular velocity and other parameters after scaling are also different from the real ones. Therefore, a real release mechanism cannot be used in the wind tunnel test, and a release mechanism needs to be designed according to the separation requirements of the test.

[0003] For the wind tunnel release test situation where the external store and the pylon model are separated from the aircraft wing as a whole. In this separation problem, the connection between the external store and the pylon and the front part of the aircraft wing is released first. Under the action of its own gravity and aerodynamic force, the external store and the pylon rotate around the tail hook connecting the pylon and the wing. After rotating to the designed angle, the tail hook is released, and the external store and the pylon are separated from the aircraft. And during the separation process, only the degree of freedom of the external store and the pylon to pitch around the tail hook is retained, and the degrees of freedom of movement in other directions need to be strictly restricted.

[0004] From the currently disclosed information, there is no wind tunnel test release mechanism that can meet the above separation requirements, mainly reflected in: 1. The existing open tail hook unhooking structure only controls the unhooking attitude of the mounted object through the contact angle, and there are problems such as mechanism jamming during separation and the separation pitch angular velocity being too fast, resulting in the separation exceeding the predetermined pitch angle; 2. There is no effective yaw angle and lateral displacement limiting structure during the separation of the mounted object around the tail hook. When the mounted object is subjected to a large lateral force and moment, the separation attitude changes severely.

[0005] Therefore, there is an urgent need to propose a wind tunnel release test mechanism and an external store separation and release method to solve the above technical problems. Summary of the Invention

[0006] The research and development purpose of the present invention is to provide a wind tunnel launch test mechanism and an external store separation and launch method for accurately separating the external store around the tail hook, so as to solve the problems that the external store model can be freely launched, the separation angle is accurate at the same time, and the damage to the wing surface by the launch mechanism is reduced. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0007] The technical solution of the present invention:

[0008] Solution 1. A wind tunnel launch test mechanism includes a wing, a fixed bearing seat, a support bearing seat, a tail hook rotating shaft seat, a front hook, a rotating shaft, a head hook, an external store, a tail hook, a locking device and an unlocking device. The rotating shaft is installed on the wing through the fixed bearing seat and the support bearing seat. A locking device is installed on the rotating shaft, and the locking device and the unlocking device are fixedly installed on the wing. The locking device restricts the rotation of the rotating shaft, and the unlocking device releases the rotation restriction of the locking device on the rotating shaft. A front hook is fixedly installed on the rotating shaft. A tail hook rotating shaft seat is fixedly installed on the wing behind the rotating shaft. A head hook and a tail hook are respectively arranged on the front and rear sides of the external store. The tail hook has a U-shaped groove, and the U-shaped groove is rotationally matched with the tail hook rotating shaft seat. The head hook is clamped and connected with the front hook.

[0009] Preferably: A tail hook rotating shaft is provided on the tail hook rotating shaft seat. The tail hook rotating shaft is rotationally fitted with the U-shaped groove. The side surface of the tail hook rotating shaft rotationally fitted with the U-shaped groove is divided into three sections. The first side surface and the third side surface are both arc-shaped curved surfaces; a part of the central angle of the third side surface is used for cooperation with the U-shaped groove, and the remaining part is the predetermined launch pitch angle; the second side surface is a vertical surface. When the tail hook rotates to the predetermined launch angle, the external store is completely separated from the tail hook rotating shaft seat.

[0010] Preferably: The locking device includes a spring seat, a plug pin, a plug pin seat, a compression spring and an adjusting screw. A plug pin seat is fixedly sleeved on the outside of the rotating shaft. The spring seat is fixedly installed on the wing. An adjusting screw is threadedly fitted on the spring seat. The adjusting screw extends into the spring seat and is fixedly connected with one end of the compression spring. One end of the plug pin extends into the spring seat and is fixedly connected with the other end of the compression spring. The other end of the plug pin is inserted into the plug pin seat.

[0011] Preferably, the unlocking device includes a cylinder, a cylinder mounting seat, a guiding shaft, a swing shaft, a rubber limiting block, a rotating shaft pushing block, a pin unlocking profile block, a guiding seat, and an eccentric cylindrical protrusion. The cylinder is fixedly mounted on the wing through the cylinder mounting seat, the guiding seat is fixedly mounted on the wing, the guiding shaft is slidably mounted inside the guiding seat, one end of the guiding shaft is fixedly connected to the output end of the cylinder, the rubber limiting block is fixedly mounted on the wing at the other end of the guiding shaft, the axis of the guiding shaft is parallel to the front-back running direction of the output end of the cylinder, the pin unlocking profile block and the rotating shaft pushing block are fixedly mounted on the right side of the guiding shaft in sequence, the swing shaft is rotatably mounted on the wing, one side of the swing shaft is clamped between the pin unlocking profile block and the rotating shaft pushing block, a groove is machined on the pin, the other side of the swing shaft is clamped in the groove, and the eccentric cylindrical protrusion is mounted on the pin seat and is located on the front side of the rotating shaft pushing block.

[0012] Preferably, the unlocking device further includes a limit switch mounting seat, a non-contact limit switch, and a trigger block. The non-contact limit switch is fixedly mounted on the wing through the limit switch mounting seat, the pin unlocking profile block is fixedly mounted on the guiding shaft, and the trigger block is mounted on the pin unlocking profile block. When the trigger block on the guiding shaft moves to the triggering position of the non-contact limit switch, the non-contact limit switch sends a signal to cut off the air supply to the cylinder, and the cylinder stops moving.

[0013] Preferably, two bosses are arranged along the axial direction of the tail hook rotating shaft, and the two bosses are respectively attached to the two side surfaces of the tail hook.

[0014] Preferably, adjusting blocks are arranged between the support bearing seat and the front hook and between the fixed bearing seat and the front hook, and the side walls of the adjusting blocks are attached to the side walls of the front hook.

[0015] Solution 2: An external store separation and release method is realized based on the wind tunnel release test mechanism described in Solution 1, and includes the following steps:

[0016] Step 1: Install the tail hook and the head hook of the external store on the tail hook rotating shaft seat and the front hook respectively, insert the pin into the pin seat, and at the same time reset the output end of the cylinder to the initial position.

[0017] Step 2: When conducting a wind tunnel aerodynamic test, after the flow field is established and stabilized, the control system sends a signal to the solenoid valve connected to the air source of the cylinder, and high-pressure gas enters the rodless cavity of the cylinder, and the output end of the cylinder drives the guiding shaft to move forward.

[0018] Step 3: The pin unlocking profile block on the guiding shaft moves forward synchronously, the swing shaft rotates, drives one side surface of the groove on the pin seat to push the pin backward, and the pin is pulled out from the pin seat.

[0019] Step 4: The guide shaft continues to move forward, so that the rotary shaft pushing block on the guide shaft pushes the eccentric cylindrical protrusion machined on the latch seat, and then pushes the front hook to rotate until the front hook disengages from the head hook.

[0020] Step 5: The tail hook of the external store rotates around the tail hook rotating shaft on the tail hook rotating shaft seat. After the tail hook touches the boss, the external store reaches the predetermined release angle, and the external store is completely disengaged from the wing. At the same time, the trigger block triggers the limit switch and sends a signal, and the solenoid valve connecting the air source of the cylinder cuts off the high-pressure air supply of the cylinder, and the output end of the cylinder resets to the initial position, and the release is completed.

[0021] The present invention has the following beneficial effects:

[0022] 1. During the establishment of the wind tunnel flow field, the present invention can realize the stable and reliable suspension of the external store model and enable the external store model to be freely released.

[0023] 2. By controlling the movement of the cylinder, the present invention can realize the release of the external store after rotating around a fixed axis to a specified angle, and the separation angle is accurate.

[0024] 3. The locking device and unlocking device of the present invention have simple structures, small volumes, reduce the damage to the wing profile and have a reduced blockage degree. At the same time, the control of the mechanism is simple, and the requirements for the control system and the supporting air supply system are low. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of a wind tunnel release test mechanism;

[0026] Figure 2 is a fitting installation diagram of the locking device and unlocking device of a wind tunnel release test mechanism of the present invention;

[0027] Figure 3 is Figure 1 the enlarged view at B of

[0028] Figure 4 is a fitting installation diagram of the adjusting screw and compression spring of a wind tunnel release test mechanism of the present invention.

[0029] In the figure: 1-wing, 2-cylinder, 3-cylinder mounting seat, 4-guide shaft, 5-spring seat, 6-pin, 7-adjusting block, 8-support bearing seat, 9-fixed bearing seat, 10-pin seat, 11-rocking shaft, 12-rubber limit block, 13-rotating shaft push block, 14-limit switch mounting seat, 15-non-contact limit switch, 16-pin unlocking profile block, 17-trigger block, 18-guide seat, 19-tail hook rotating shaft seat, 20-front hook, 21-rotating shaft, 22-head hook, 23-external load, 24-tail hook, 25-adjusting screw, 26-compression spring, 27-U-shaped groove, 28-groove, 29-tail hook rotating shaft, 30-first side, 31-second side, 32-third side, 33-boss, 34-eccentric cylindrical protrusion. Detailed implementation mode

[0030] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0031] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connections are non-detachable connections, including but not limited to conventional fixed connection methods such as hemming connection, rivet connection, bonding connection and welding connection. The detachable connections include but not limited to conventional disassembly methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is defaulted that at least one connection method can always be found in the existing connection methods to achieve this function, and those skilled in the art can select according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0032] Embodiment 1: Combine Figures 1-4Description of this embodiment: A wind tunnel release test mechanism of this embodiment includes a wing 1, a fixed bearing seat 9, a support bearing seat 8, a tail hook rotating shaft seat 19, a front hook 20, a rotating shaft 21, a head hook 22, an external load 23, a tail hook 24, a locking device and an unlocking device. The rotating shaft 21 is installed on the wing 1 through the fixed bearing seat 9 and the support bearing seat 8. A locking device is installed on the rotating shaft 21, and the locking device and the unlocking device are fixedly installed on the wing 1. The locking device restricts the rotation of the rotating shaft 21, and the unlocking device releases the rotation restriction of the locking device on the rotating shaft 21. A front hook 20 is fixedly installed on the rotating shaft 21. A tail hook rotating shaft seat 19 is fixedly installed on the wing 1 behind the rotating shaft 21. A head hook 22 and a tail hook 24 are respectively arranged on the front and rear sides of the external load 23. The tail hook 24 has a U-shaped groove 27, and the U-shaped groove 27 is rotationally matched with the tail hook rotating shaft seat 19. The head hook 22 is clamped and connected with the front hook 20. The head hook 22 is connected to the rotatable front hook 20 installed on the wing 1 through an inclined surface. Since the inclined surface angle is greater than the inclined surface self-locking angle, when the locking device cancels the rotation restriction on the front hook 20, under the action of the gravity of the external load 23, the head hook 22 of the external load 23 will push the front hook 20 to rotate. When they are not in contact, under the action of gravity, the tail hook 24 of the external load 23 continues to rotate around the rotating shaft 21 until the release angle is reached, and the external load 23 is completely separated from the wing.

[0033] The tail hook rotating shaft seat 19, the front hook 20, the rotating shaft 21, the head hook 22 and the tail hook 24 constitute a suspension device. The external load 23 is stably fixed to the designated hanging position in a specified posture, and accurate positioning is required. The locking device is used to restrict the suspension device to ensure that the external load 23 will not move or fall off before release. At the same time, the suspension device adopts a double-hanging point method. The rear hanging point adopts an arc hook form, and the front hanging point adopts an inclined surface hook form; the unlocking device is used to release the movement restriction of the locking device on the suspension device to realize the release of the external load 23, that is, to restrict the rotation of the front hook 20 to prevent the external load 23 from moving. Both the locking device and the unlocking device can be built into the wing 1, and only the suspension device of the external load 23 protrudes. The locking device is installed in the groove machined on the surface of the wing 1 to minimize the damage to the wing surface, reduce the damage to the wing profile and have a reduced blockage degree.

[0034] The suspension device adopts a double-hanging point method. In order to meet the requirement that the external load is separated from the wing 1 after moving to the predetermined pitch angle during release, a tail hook rotating shaft seat 19 is installed on the wing 1.

[0035] A tail hook rotating shaft seat 19 is provided with a tail hook rotating shaft 29, and the tail hook rotating shaft 29 is in rotational fit with a U-shaped groove 27. In order to ensure that after reaching the release pitch angle, the external store 23 is separated from the wing 1, the side surface of the rotational fit between the tail hook rotating shaft 29 and the U-shaped groove 27 is divided into three sections, namely a first side surface 30, a second side surface 31 and a third side surface 32. Both the first side surface 30 and the third side surface 32 are arc-shaped curved surfaces. The central angle of the arc-shaped curved surface of the first side surface 30 is the predetermined release pitch angle; a part of the central angle of the third side surface 32 is used for cooperation with the U-shaped groove 27, and the remaining part is the predetermined release pitch angle; the second side surface 31 is a vertical surface. When the tail hook 24 rotates to reach the predetermined release angle, the external store 23 is completely separated from the tail hook rotating shaft seat 19.

[0036] The locking device uses a pin to limit the rotation of the rotating shaft. The locking device includes a spring seat 5, a pin 6, a pin seat 10, a compression spring 26 and an adjusting screw 25. A pin seat 10 is fixedly sleeved outside the rotating shaft 21. The spring seat 5 is fixedly installed on the wing 1. An adjusting screw 25 is threadedly fitted on the spring seat 5. The adjusting screw 25 extends into the spring seat 5 and is fixedly connected to one end of the compression spring 26. The left end of the pin 6 extends into the spring seat 5 and is fixedly connected to the other end of the compression spring 26. The right end of the pin 6 is inserted into the pin seat 10. The pin 6 is inserted into a pin hole machined radially along the rotating shaft 21 on the pin seat 10, which limits the rotation of the rotating shaft 21, and further limits the rotation of the front hook 20, realizing the locking of the external store 23. In order to prevent the pin 6 from falling out of the pin seat 10, the compression spring 26 is compressed at the right end of the pin 6. The compression spring 26 is installed in the spring seat 5. The adjusting screw installed on the fixed end side of the compression spring 26 is used to adjust the compression amount of the compression spring 26. The end of the pin 6 is inserted into the movable end of the compression spring 26; a boss is machined on the cylindrical surface at the left end of the pin 6 to cooperate with a square groove provided on the spring seat 5 to prevent the pin 6 from rotating. At the same time, an inclined surface boss is machined on the cylindrical surface of the pin 6 for pulling out the pin 6 from the pin seat 10, that is, realizing the release of the locking function.

[0037] The unlocking device of the external store pulls out the bolt 6 from the bolt seat 10, thereby realizing the release of the external store 23. To prevent the rotation shaft 21 from not rotating to the proper position and causing the release to fail, the unlocking device can push the rotation shaft 21 to rotate to a suitable angle. The unlocking device includes a cylinder 2, a cylinder mounting seat 3, a guide shaft 4, a swing shaft 11, a rubber limit block 12, a rotation shaft pushing block 13, a bolt unlocking profile block 16, a guide seat 18, and an eccentric cylindrical protrusion 34. The driving component of the unlocking device is a cylinder 2 arranged along the axial direction of the guide shaft 4. The cylinder 2 is fixedly installed on the wing 1 through the cylinder mounting seat 3. To prevent the output shaft of the cylinder and the guide shaft from rotating, a guide seat 18 is fixedly installed on the wing 1. The guide shaft 4 is slidably installed inside the guide seat 18, enabling the guide shaft to slide within the through-hole of the guide seat, and a guide key is installed between the two. The left end of the guide shaft 4 is fixedly connected to the output end of the cylinder 2 through a thread. To prevent the cylinder 2 from accidentally operating and damaging the wing 1, a rubber limit block 12 is fixedly installed on the wing 1 at the right end of the guide shaft 4. The rubber limit block 12 restricts the maximum distance of movement of the guide shaft. The axis of the guide shaft 4 is parallel to the front-back running direction of the output end of the cylinder 2. The bolt unlocking profile block 16 and the rotation shaft pushing block 13 are fixedly installed on the right side of the guide shaft 4 in sequence. The bolt unlocking profile block 16 and the rotation shaft pushing block 13 are fixed and their positions are adjusted using threads. At the intermediate position between the spring seat and the cylinder, the swing shaft 11 is rotatably installed on the wing 1 through a bearing and a rotating shaft. The swing shaft is machined with two symmetrical inclined planes in the radial direction. One inclined plane of the swing shaft 11 is clamped between the bolt unlocking profile block 16 and the rotation shaft pushing block 13 and cooperates with the bolt unlocking profile block. A groove 28 is machined on the bolt 6. The other inclined plane of the swing shaft 11 is clamped inside the groove 28 and cooperates with the inclined plane machined on the side wall of the groove 28. An eccentric cylindrical protrusion 34 is installed on the bolt seat 10. The eccentric cylindrical protrusion 34 is located on the front side of the rotation shaft pushing block 13. When the output end of the cylinder 2 extends, the bolt unlocking profile block 16 moves forward, driving the swing shaft 11 to rotate, and then causing the bolt 6 to move backward axially, thereby pulling out the bolt 6 from the bolt seat 10. The guide shaft 4 continues to move forward, and the rotation shaft pushing block 13 contacts the eccentric cylinder of the eccentric cylindrical protrusion 34 installed on the bolt seat 10, driving the eccentric cylinder to rotate around the axis of the rotation shaft 21, that is, driving the rotation shaft 21 to rotate, and then causing the front hook 20 to rotate, completing the disengagement of the front hook 10 from the head hook 22 of the external store 23.

[0038] The unlocking device further includes a limit switch mounting seat 14, a non-contact limit switch 15, and a trigger block 17. The non-contact limit switch 15 is fixedly installed on the wing 1 through the limit switch mounting seat 14. The bolt unlocking profile block 16 is fixedly installed on the guide shaft 4. A trigger block 17 is installed on the bolt unlocking profile block 16. When the trigger block 17 on the guide shaft 4 moves to the triggering position of the non-contact limit switch 15, the sensor of the non-contact limit switch 15 emits a signal to cut off the air supply to the cylinder 2, and the cylinder 2 stops moving.

[0039] In order to ensure the accurate positioning of the hanging position and solve the problem that the external hanging pitch angle exceeds the predetermined pitch angle when separated, the tail hook shaft 29 is provided with two bosses 33 along its axial direction to ensure the accuracy of the installation pitch angle and the delivery pitch angle of the external hanging object 23. The two bosses 33 are respectively fitted with the two side surfaces of the tail hook 24 to ensure that the tail hook 24 is accurately positioned without yaw angle, and there is no yaw, roll and lateral displacement during delivery. One of the bosses 33 cooperates with the upper end surface of the U-shaped groove 27 of the external hanging object tail hook 24 to ensure the accuracy of the initial hanging position. When the external hanging object 23 reaches the predetermined delivery pitch angle, the other boss 33 contacts and limits the lower end surface of the U-shaped groove 27 of the external hanging object tail hook 24 to limit the delivery angle.

[0040] An adjustment block 7 is provided between the support bearing seat 8 and the front hook 20 and between the fixed bearing seat 9 and the front hook 20, and the side wall of the adjustment block 7 is in contact with the side wall of the front hook 20. At the same time, the groove processed on the wing 1 is used to cooperate with the two sides of the front hook 20 of the external hanger 23, ensuring that there is no yaw angle and lateral displacement during the initial installation and delivery of the external hanger 23. The adjustment block 7 is used to ensure the position of the front hook 20 along the axis of the rotating shaft 21. The thickness of the adjustment block 7 can be adjusted to ensure that the front hook 20 is fully matched with the inclined surface of the head hook 22 to prevent the situation of misalignment along the thickness direction.

[0041] Embodiment 2: Combination Figures 1-4 This embodiment is described. Based on the wind tunnel delivery test mechanism described in Example 1, a method for separating and delivering external objects in this embodiment includes the following steps:

[0042] Step 1, install the tail hook 24 and the head hook 22 of the external object 23 on the tail hook shaft seat 19 and the front hook 20 respectively, insert the latch 6 into the latch seat 10, and reset the output end of the cylinder 2 to the initial position;

[0043] Step 2, when the wind tunnel pneumatic test is carried out and the flow field is established and stabilized, the control system sends a signal to the solenoid valve connected to the air source of the cylinder 2, and the high-pressure gas enters the rodless cavity of the cylinder 2, and the output end of the cylinder 2 drives the guide shaft 4 to move forward;

[0044] Step 3, the latch unlocking profile block 16 on the guide shaft 4 moves forward synchronously, and the swing shaft 11 rotates, driving one side of the groove 28 on the latch seat 10 to push the latch 6 to move backward, and the latch 6 is pulled out from the latch seat 10;

[0045] Step 4: The guide shaft 4 continues to move forward. To prevent the front hook 20 from jamming during movement, the rotary shaft pushing block 13 on the guide shaft 4 pushes the eccentric cylindrical protrusion 34 machined on the pin seat 10, thereby causing the front hook 20 to rotate until the front hook 20 disengages from the head hook 22 of the external load.

[0046] Step 5: The tail hook 24 of the external load 23 rotates around the tail hook rotating shaft 29 on the tail hook rotating shaft seat 19. After the tail hook 24 touches the boss 33, the external load 23 reaches the predetermined release angle, and the external load 23 is completely disengaged from the wing 1. At the same time, the trigger block 17 triggers the limit switch 15 and sends a signal, and the solenoid valve connecting the air source of the cylinder 2 cuts off the high-pressure air supply to the cylinder 2, and the output end of the cylinder 2 returns to the initial position, and the release is completed.

[0047] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind tunnel test mechanism, characterized in that: The invention comprises a wing (1), a fixed bearing seat (9), a supporting bearing seat (8), a tail hook shaft seat (19), a front hook (20), a shaft (21), a head hook (22), an external attachment (23), a tail hook (24), a locking device and an unlocking device. The shaft (21) is mounted on the wing (1) through the fixed bearing seat (9) and the supporting bearing seat (8). The locking device is mounted on the shaft (21). The locking device and the unlocking device are fixedly mounted on the wing (1). The locking device limits the rotation of the shaft (21). The unlocking device releases the rotation restriction of the rotating shaft (21) by the locking device. A front hook (20) is fixedly mounted on the rotating shaft (21). A tail hook rotating shaft seat (19) is fixedly mounted on the wing (1) located at the rear side of the rotating shaft (21). A head hook (22) and a tail hook (24) are respectively arranged on the front and rear sides of the external hanging object (23). The tail hook (24) has a U-shaped groove (27). The U-shaped groove (27) is rotatably matched with the tail hook rotating shaft seat (19). The head hook (22) is connected to the front hook (20) by clamping. The unlocking device comprises a cylinder (2), a cylinder mounting seat (3), a guide shaft (4), a rocking shaft (11), a rubber stopper (12), a rotating shaft pushing block (13), a latch unlocking profile block (16), a guide seat (18) and an eccentric cylindrical protrusion (34); the cylinder (2) is fixedly mounted on the wing (1) through the cylinder mounting seat (3); the guide seat (18) is fixedly mounted on the wing (1); a guide shaft (4) is slidably mounted inside the guide seat (18); one end of the guide shaft (4) is fixedly connected to the output end of the cylinder (2); and the other end of the guide shaft (4) is fixedly mounted on the wing (1). ), the axis of the guide shaft (4) is parallel to the front-rear running direction of the output end of the cylinder (2), a latch unlocking profile block (16) and a rotating shaft pushing block (13) are fixedly installed in sequence on the right side of the guide shaft (4), a swing shaft (11) is rotatably installed on the wing (1), one side of the swing shaft (11) is clamped between the latch unlocking profile block (16) and the rotating shaft pushing block (13), a groove (28) is processed on the latch (6), and the other side of the swing shaft (11) is clamped in the groove (28), and an eccentric cylindrical protrusion (34) is installed on the latch seat (10), and the eccentric cylindrical protrusion (34) is located on the front side of the rotating shaft pushing block (13).

2. A wind tunnel test mechanism according to claim 1, characterized in that: The tail hook rotating shaft seat (19) is provided with a tail hook rotating shaft (29), the tail hook rotating shaft (29) is rotationally fitted with the U-shaped groove (27), and the side surface of the tail hook rotating shaft (29) and the U-shaped groove (27) is divided into three sections, the first section side surface (30) and the third section side surface (32) are both arc-shaped curved surfaces; a part of the central angle of the third section side surface (32) is used to match with the U-shaped groove (27), and the remaining part is a predetermined pitch angle for delivery; the second section side surface (31) is a vertical surface, and when the tail hook (24) rotates to reach the predetermined delivery angle, the external attachment (23) is completely separated from the tail hook rotating shaft seat (19).

3. A wind tunnel test mechanism according to claim 2, characterized in that: The locking device comprises a spring seat (5), a latch pin (6), a latch seat (10), a compression spring (26) and an adjusting screw (25); the latch seat (10) is fixedly sleeved on the outer side of the rotating shaft (21); the spring seat (5) is fixedly mounted on the wing (1); the adjusting screw (25) is threadedly mounted on the spring seat (5); the adjusting screw (25) is inserted into the interior of the spring seat (5) and is fixedly connected to one end of the compression spring (26); one end of the latch pin (6) is inserted into the interior of the spring seat (5) and is fixedly connected to the other end of the compression spring (26); the other end of the latch pin (6) is inserted into the latch seat (10).

4. A wind tunnel test mechanism according to claim 3, characterized in that: The unlocking device further comprises a limit switch mounting seat (14), a non-contact limit switch (15) and a trigger block (17); the non-contact limit switch (15) is fixedly mounted on the wing (1) via the limit switch mounting seat (14); the latch unlocking profile block (16) is fixedly mounted on the guide shaft (4); the trigger block (17) is mounted on the latch unlocking profile block (16); when the trigger block (17) on the guide shaft (4) moves to the trigger position of the non-contact limit switch (15), the non-contact limit switch (15) sends a signal to cut off the air supply to the cylinder (2), and the cylinder (2) stops moving.

5. A wind tunnel test mechanism according to claim 4, characterized in that: The tail hook rotating shaft (29) is provided with two bosses (33) along its axial direction, and the two bosses (33) are respectively fitted with two side surfaces of the tail hook (24).

6. A wind tunnel test mechanism according to claim 5, characterized in that: An adjustment block (7) is provided between the supporting bearing seat (8) and the front hook (20) and between the fixed bearing seat (9) and the front hook (20), and the side wall of the adjustment block (7) is in contact with the side wall of the front hook (20).

7. A method for separating and releasing external objects, which is realized by relying on a wind tunnel release test mechanism as claimed in claim 6, characterized in that: The following steps are involved: Step 1, install the tail hook (24) and the head hook (22) of the external object (23) on the tail hook shaft seat (19) and the front hook (20) respectively, insert the latch (6) into the latch seat (10), and reset the output end of the cylinder (2) to the initial position; Step 2, when the wind tunnel aerodynamic test is carried out and the flow field is established and stabilized, the control system sends a signal to the solenoid valve connected to the air source of the cylinder (2), and the high-pressure gas enters the rodless cavity of the cylinder (2), and the output end of the cylinder (2) drives the guide shaft (4) to move forward; Step 3, the latch unlocking profile block (16) on the guide shaft (4) moves forward synchronously, and the swing shaft (11) rotates, driving one side of the groove (28) on the latch seat (10) to push the latch (6) backward, and the latch (6) is pulled out from the latch seat (10); Step 4, the guide shaft (4) continues to move forward, so that the rotating shaft pushing block (13) on the guide shaft (4) pushes the eccentric cylindrical protrusion (34) processed on the latch seat (10), thereby pushing the front hook (20) to rotate until the front hook (20) is disengaged from the head hook (22); Step 5, the tail hook (24) of the external attachment (23) rotates around the tail hook shaft (29) on the tail hook shaft seat (19), and after the tail hook (24) hits the boss (33), the external attachment (23) reaches the predetermined delivery angle, and the external attachment (23) is completely separated from the wing (1). At the same time, the trigger block (17) triggers the limit switch (15) and sends a signal, and the solenoid valve connected to the air source of the cylinder (2) cuts off the high-pressure air supply of the cylinder (2), and the output end of the cylinder (2) is reset to the initial position, and the delivery is completed.

Images