Wind tunnel release test mechanism and external store separation release method

Abstract

The invention discloses a wind tunnel release test mechanism and an external store separation release method, and belongs to the field of wind tunnel tests. The device comprises 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 a supporting bearing seat, the locking device is installed on the rotating shaft, the locking device and the unlocking device are installed on the wing, and the locking device limits rotation of the rotating shaft. The unlocking device relieves rotation limitation 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 arranged on the front side and the rear side of the external store respectively, a U-shaped groove of the tail hook is in rotating fit with the tail hook rotating shaft seat, and the head hook is connected with the front hook in a clamped mode. The problems that the plug-in model can be freely thrown, the separation angle is accurate, and the damage of a throwing mechanism to the wing curved surface is reduced are solved, reliable hanging of the plug-in model can be achieved in the wind tunnel flow field building process, and unlocking and throwing of the plug-in can be achieved.

Description

Technical Field

[0001] The invention relates to a wind tunnel delivery test mechanism and an external object separation delivery method, belonging to the field of wind tunnel testing. Background Art

[0002] A drop test is a special wind tunnel test in which a model of a mount is separated from a carrier aircraft in a wind tunnel, and the image of the mount separation is recorded using video measurement techniques such as high-speed photography. In the test, the suspension-separation of the mount model is achieved through a drop mechanism, and in the drop test, the mount is required to be able to separate from the carrier aircraft model at the separation position required by the test, according to the required separation angular velocity and linear velocity. Due to the size limitations of the wind tunnel test section, aircraft-missile separation drop tests are usually conducted using scaled models. The internal structure and space of the carrier aircraft model are very different from those of a real aircraft, and the parameters such as the initial linear velocity and angular velocity of the separation after scaling are also different from the real ones. Therefore, a real drop mechanism cannot be used in the wind tunnel test, and it is necessary to design the drop mechanism according to the separation requirements of the test.

[0003] In the wind tunnel test, the external load and the pylon model are separated from the wing of the carrier aircraft as a whole. In this separation problem, the constraints of the connection between the external load and the pylon and the front part of the wing of the carrier aircraft are first released. Under the action of their own gravity and aerodynamic force, the external load 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 load and the pylon are separated from the carrier aircraft. In the separation process, only the freedom of the external load and the pylon to move around the tail hook in the pitch direction is retained, and the freedom of movement in other directions needs to be strictly limited.

[0004] Judging from the currently available information, there is no wind tunnel test delivery mechanism that can meet the above-mentioned separation requirements, which is mainly reflected in the following aspects: 1. The existing open tail hook unhooking structure only controls the unhooking posture of the mount by the contact angle, and there are problems such as the mechanism getting stuck during separation and the separation pitch angle speed being too fast, resulting in separation exceeding the predetermined pitch angle; 2. The mount has no effective yaw angle and lateral displacement limiting structure during the separation process around the tail hook. When the mount is subjected to large lateral force and torque, the separation posture changes seriously.

[0005] Therefore, it is urgent to propose a wind tunnel release test mechanism and a method for separating and releasing external attachments to solve the above-mentioned technical problems. Summary of the invention

[0006] The purpose of the research and development of the present invention is to provide a wind tunnel delivery test mechanism and a method for separating and delivering external objects at precise angles around the tail hook, so as to solve the problem that the external model can be freely delivered, the separation angle is accurate, and the damage of the delivery mechanism to the wing surface 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 determine 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: Scheme 1: A wind tunnel test mechanism, comprising a wing, a fixed bearing seat, a supporting bearing seat, a tail hook rotating shaft seat, a front hook, a rotating shaft, a head hook, an external attachment, 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 supporting bearing seat. A locking device is installed on the rotating shaft. The locking device and the unlocking device are fixedly installed on the wing. The locking device limits the rotation of the rotating shaft, and the unlocking device releases the rotation restriction of the rotating shaft by the locking device. The front hook is fixedly installed on the rotating shaft, and a tail hook rotating shaft seat is fixedly installed on the wing located at the rear side of the rotating shaft. A head hook and a tail hook are respectively arranged on the front and rear sides of the external attachment. The tail hook has a U-shaped groove, and the U-shaped groove is rotatably matched with the tail hook rotating shaft seat. The head hook is connected with the front hook by clamping.

[0008] Preferably: a tail hook rotating shaft is provided on the tail hook rotating shaft seat, and the tail hook rotating shaft is rotatably fitted with the U-shaped groove, and the side surface of the tail hook rotating shaft and the U-shaped groove is divided into three sections, the first section side surface and the third section side surface are both arc-shaped curved surfaces; a part of the central angle of the third section side surface is used to cooperate with the U-shaped groove, and the remaining part is a predetermined delivery pitch angle; the second section side surface is a vertical surface, and when the tail hook rotates to reach the predetermined delivery angle, the external attachment is completely separated from the tail hook rotating shaft seat.

[0009] Preferably: the locking device includes a spring seat, a latch, a latch seat, a compression spring and an adjusting screw, the latch seat is fixedly mounted on the outer side of the rotating shaft, the spring seat is fixedly mounted on the wing, an adjusting screw is threadedly mounted on the spring seat, the adjusting screw penetrates into the interior of the spring seat and is fixedly connected to one end of the compression spring, one end of the latch penetrates into the interior of the spring seat and is fixedly connected to the other end of the compression spring, and the other end of the latch is inserted into the latch seat.

[0010] Preferably: the unlocking device comprises a cylinder, a cylinder mounting seat, a guide shaft, a rocking shaft, a rubber limit block, a rotating shaft pushing block, a latch unlocking profile block, a guide seat and an eccentric cylindrical protrusion, the cylinder is fixedly mounted on the wing through the cylinder mounting seat, the guide seat is fixedly mounted on the wing, a guide shaft is slidably mounted inside the guide seat, one end of the guide shaft is fixedly connected to the output end of the cylinder, a rubber limit block is fixedly mounted on the wing at the other end of the guide shaft, the axis of the guide shaft is parallel to the front and rear running direction of the output end of the cylinder, a latch unlocking profile block and a rotating shaft pushing block are fixedly mounted on the right side of the guide shaft in sequence, a rocking shaft is rotatably mounted on the wing, one side of the rocking shaft is clamped between the latch unlocking profile block and the rotating shaft pushing block, a groove is machined on the latch, and the other side of the rocking shaft is clamped in the groove, an eccentric cylindrical protrusion is mounted on the latch seat, and the eccentric cylindrical protrusion is located on the front side of the rotating shaft pushing block.

[0011] Preferably: the unlocking device also 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 latch unlocking profile block is fixedly mounted on the guide shaft, and the latch unlocking profile block is installed with a trigger block, when the trigger block on the guide shaft moves to the trigger position of the non-contact limit switch, the non-contact limit switch sends a signal, cuts off the air supply to the cylinder, and the cylinder stops moving.

[0012] Preferably, the tail hook shaft is provided with two bosses along its axial direction, and the two bosses are respectively fitted with two side surfaces of the tail hook.

[0013] Preferably, an adjustment block is provided between the support bearing seat and the front hook and between the fixed bearing seat and the front hook, and the side wall of the adjustment block is in contact with the side wall of the front hook.

[0014] Solution 2: A method for separating and releasing external objects is implemented based on a wind tunnel release test mechanism described in Solution 1, and includes the following steps: Step 1, install the tail hook and the head hook of the external object on the tail hook shaft seat and the front hook respectively, insert the latch into the latch seat, and reset the output end of the cylinder 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, and the high-pressure gas enters the rodless cavity of the cylinder, and the output end of the cylinder drives the guide shaft to move forward; Step 3, the latch unlocking profile block on the guide shaft moves forward synchronously, and the swing shaft rotates, driving one side of the groove on the latch seat to push the latch backward, and the latch is pulled out of the latch seat; Step 4, the guide shaft continues to move forward, so that the rotating shaft push block on the guide shaft pushes the eccentric cylindrical protrusion processed on the latch seat, thereby pushing the front hook to rotate until the front hook is disengaged from the head hook; Step 5, the tail hook of the external attachment rotates around the tail hook shaft on the tail hook shaft seat. After the tail hook hits the boss, the external attachment reaches the predetermined delivery angle, and the external attachment is completely disengaged from the wing. At the same time, the trigger block triggers the limit switch and sends a signal. The solenoid valve connected to 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 delivery is completed.

[0015] The present invention has the following beneficial effects: 1. The present invention can realize the stable and reliable suspension of the external model during the establishment of the wind tunnel flow field, and at the same time, the external model can be freely dropped.

[0016] 2. The present invention can realize the external attachment being released after the fixed axis is rotated to a specified angle by controlling the movement of the cylinder, and the separation angle is accurate.

[0017] 3. The locking device and unlocking device of the present invention have simple structure and small volume, reduce the damage to the airfoil profile and reduce the blockage degree. At the same time, the control of the mechanism is simple and has low requirements on the control system and the supporting air supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a wind tunnel test mechanism; Figure 2 It is a diagram of the coordinated installation of a locking device and an unlocking device of a wind tunnel test mechanism of the present invention; Figure 3 yes Figure 1 The enlarged view of point B; Figure 4 The present invention discloses a matching installation diagram of an adjustment screw and a compression spring of a wind tunnel test mechanism.

[0019] In the figure, 1-wing, 2-cylinder, 3-cylinder mounting seat, 4-guide shaft, 5-spring seat, 6-latch, 7-adjustment block, 8-support bearing seat, 9-fixed bearing seat, 10-latch seat, 11-swing shaft, 12-rubber limit block, 13-rotating shaft push block, 14-limit switch mounting seat, 15-non-contact limit switch, 16-latch unlocking profile block, 17-trigger block, 18-guide seat, 19-tail hook shaft seat, 20-front hook, 21-spindle, 22-head hook, 23-external attachment, 24-tail hook, 25-adjustment screw, 26-compression spring, 27-U-shaped groove, 28-groove, 29-tail hook shaft, 30-first section side, 31-second section side, 32-third section side, 33-boss, 34-eccentric cylindrical protrusion. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0021] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: a fixed connection is selected as a welding connection, and a detachable connection is selected as a hinge connection.

[0022] Embodiment 1: Combination Figure 1-Figure 4 The present embodiment is described. A wind tunnel test mechanism of the present embodiment 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. A 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 shaft 21 by the locking device. The front hook 20 is fixedly mounted on the shaft 21. The tail hook shaft seat 19 is fixedly mounted on the wing 1 at the rear side of the shaft 21. The head hook 22 and the tail hook 24 are respectively arranged on the front and rear sides of the external attachment 23. The tail hook 24 has a U-shaped groove 27. The U-shaped groove 27 is rotatably matched with the tail hook 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 plane. Since the angle of the inclined plane is greater than the self-locking angle of the inclined plane, when the locking device cancels the rotation restriction on the front hook 20, the head hook 22 of the external hanging 23 will push the front hook 20 to rotate under the action of the gravity of the external hanging 23. When the two are no longer in contact, under the action of gravity, the tail hook 24 of the external hanging 23 continues to rotate around the rotating shaft 21 until the release angle is reached and the external hanging 23 is completely separated from the wing.

[0023] The tail hook shaft seat 19, the front hook 20, the shaft 21, the head hook 22, and the tail hook 24 constitute a suspension device. The external object 23 is stably fixed to the designated hanging position in a designated posture, and accurate positioning is required. The locking device is used to limit the suspension device to ensure that the external object 23 will not move or fall off before being released. 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 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 object 23, that is, to limit the rotation of the front hook 20, thereby preventing the movement of the external object 23. The locking device and the unlocking device can be built into the wing 1, and only the external object 23 is protruding. The locking device is installed in the groove processed on the surface of the wing 1, which minimizes the damage to the wing curved surface, reduces the damage to the wing profile, and has a reduced blockage degree.

[0024] The suspension device adopts the mode of double hanging points. In order to realize the requirement of disconnecting from the wing 1 after moving to the predetermined pitch angle when the external hanging is delivered, the tail hook shaft seat 19 is installed on the wing 1.

[0025] The tail hook shaft seat 19 is provided with a tail hook shaft 29, which is rotationally fitted with the U-shaped groove 27. In order to ensure that the external attachment 23 is separated from the wing 1 after reaching the pitch angle of delivery, the side surface where the tail hook shaft 29 is rotationally fitted with the U-shaped groove 27 is divided into three sections, namely a first section side surface 30, a second section side surface 31 and a third section side surface 32. The first section side surface 30 and the third section side surface 32 are both arc-shaped curved surfaces, and the center angle of the arc-shaped curved surface of the first section side surface 30 is the predetermined delivery pitch angle; a part of the center angle of the third section side surface 32 is used to cooperate with the U-shaped groove 27, and the remaining part is the predetermined delivery pitch angle; 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 shaft seat 19.

[0026] The locking device uses a latch to limit the rotation of the rotating shaft. The locking device includes a spring seat 5, a latch 6, a latch seat 10, a compression spring 26 and an adjustment screw 25. The latch seat 10 is fixedly mounted on the outer side of the rotating shaft 21. The spring seat 5 is fixedly mounted on the wing 1. The adjustment screw 25 is threadedly mounted on the spring seat 5. The adjustment screw 25 penetrates into the spring seat 5 and is fixedly connected with one end of the compression spring 26. The left end of the latch 6 penetrates into the spring seat 5 and is fixedly connected with the other end of the compression spring 26. The right end of the latch 6 is inserted into the latch seat 10. The latch 6 is inserted into the pin hole processed along the radial direction of the rotating shaft 21 on the latch seat 10, which limits the rotation of the rotating shaft 21, thereby limiting the rotation of the front hook 20, and realizing the locking of the external hanging object 23. In order to prevent the latch 6 from falling off from the latch seat 10, a compression spring 26 is installed at the right end of the latch 6 for compression. The compression spring 26 is installed in the spring seat 5, and the adjustment screw installed on one side of the fixed end of the compression spring 26 is used to adjust the compression amount of the compression spring 26. The end of the plug 6 is inserted into the movable end of the compression spring 26; the boss machined on the cylindrical surface of the left end of the plug 6 cooperates with the square groove set on the spring seat 5 to prevent the plug 6 from rotating. At the same time, an inclined boss is machined on the cylindrical surface of the plug 6 to pull the plug 6 out of the plug seat 10, that is, to release the locking function.

[0027] The unlocking device of the external object pulls out the latch 6 from the latch seat 10, thereby realizing the placement of the external object 23. In order to prevent the rotation shaft 21 from not rotating in place and causing the placement failure, 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 rocking shaft 11, a rubber limit block 12, a rotating shaft pushing block 13, a latch 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 mounted on the wing 1 through the cylinder mounting seat 3. In order to prevent the cylinder output shaft and the guide shaft from rotating, a guide seat 18 is provided and fixedly mounted on the wing 1. The guide shaft 4 is slidably mounted inside the guide seat 18 so that the guide shaft slides in 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. In order to prevent the cylinder 2 from damaging the wing 1 due to misoperation, a rubber limit block 12 is fixedly mounted on the wing 1 at the right end of the guide shaft 4. The rubber limit block 12 limits the maximum movement distance of the guide shaft. The axis of the guide shaft 4 is parallel to the front-to-back running direction of the output end of the cylinder 2. The right side of the guide shaft 4 is fixedly installed with a latch unlocking profile block 16 and a rotating shaft pushing block 13 in sequence. The latch unlocking profile block 16 and the rotating shaft pushing block 13 are fixed and adjusted in position by threads. In the middle position between the spring seat and the cylinder, a swing shaft 11 is rotatably installed on the wing 1 through a bearing and a rotating shaft. The swing shaft is processed with two symmetrical inclined surfaces in the radial direction. The inclined surface on one side of the swing shaft 11 is clamped between the latch unlocking profile block 16 and the rotating shaft pushing block 13, and cooperates with the latch unlocking profile block. A groove 28 is processed on the latch 6, and the inclined surface on the other side of the swing shaft 11 is clamped in the groove 28 and cooperates with the inclined surface processed on the side wall of the groove 28. 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. When the output end of the cylinder 2 extends, the latch unlocking profile block 16 moves forward, driving the swing shaft 11 to rotate, thereby causing the latch 6 to move axially backward, thereby pulling the latch 6 out of the latch seat 10. The guide shaft 4 continues to move forward, and the rotating shaft pusher block 13 contacts the eccentric cylinder of the eccentric cylindrical protrusion 34 installed on the latch seat 10, driving the eccentric cylinder to rotate around the axis of the rotating shaft 21, that is, driving the rotating shaft 21 to rotate, thereby causing the front hook 20 to rotate, and the front hook 10 is separated from the head hook 22 of the external object 23.

[0028] The unlocking device also 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 mounted on the wing 1 through the limit switch mounting seat 14, and the latch unlocking profile block 16 is fixedly mounted on the guide shaft 4. The trigger block 17 is installed 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 sensor of 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.

[0029] 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.

[0030] 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.

[0031] Embodiment 2: Combination Figure 1-Figure 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: 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 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; 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; Step 4, the guide shaft 4 continues to move forward. In order to prevent the front hook 20 from getting stuck during the movement, 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 of the external object. 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. 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. 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.

[0032] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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, wherein 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), and 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 attachment (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.

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), and the tail hook rotating shaft (29) is rotationally fitted with the U-shaped groove (27). The side surface of the tail hook rotating shaft (29) and the U-shaped groove (27) is divided into three sections, and 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 cooperate with the U-shaped groove (27), and the remaining part is a predetermined pitch angle; 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 pin seat (10), a compression spring (26) and an adjusting screw (25); the latch pin 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 pin seat (10).

4. A wind tunnel test mechanism according to claim 3, characterized in that: 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), wherein the cylinder (2) is fixedly mounted on the wing (1) via 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 on the right side of the guide shaft (4) in sequence, 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).

5. A wind tunnel test mechanism according to claim 4, 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 a 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.

6. A wind tunnel test mechanism according to claim 5, 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).

7. A wind tunnel test mechanism according to claim 6, 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 a side wall of the adjustment block (7) is in contact with a side wall of the front hook (20).

8. A method for separating and releasing external objects, which is realized by relying on a wind tunnel release test mechanism as claimed in claim 7, characterized in that: The following steps are involved: Step 1, installing 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, inserting the latch (6) into the latch seat (10), and resetting the output end of the cylinder (2) back to the initial position; 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; 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 of 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 a predetermined release 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 release is completed.

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