A folding wing locking and releasing device in the form of a connecting rod structure and a test method

Abstract

A folding wing locking and releasing device and a test method in the form of a connecting rod structure belong to the field of wind tunnel testing. The present invention includes a test model, a model support rod and a folding wing, wherein the test model is mounted on the model support rod, and the folding wing is hingedly mounted on the bottom of the test model; it also includes a load-bearing connecting rod assembly, a wing locking hook and an unlocking assembly, wherein the load-bearing connecting rod assembly is mounted on the test model, and the load-bearing connecting rod assembly locks or releases the wing locking hook through the unlocking assembly, and when the load-bearing connecting rod assembly locks the wing locking hook through the unlocking assembly, the wing locking hook is connected to the folding wing by clamping. The research and development purpose of the present invention is to solve the problems of high test cost and low test quality in the existing locking and releasing methods in the wind tunnel test of folding wing deployment. The present invention can ensure the rapid deployment of the wing, and has low test cost and high test efficiency.

Description

Technical Field

[0001] The invention relates to a folding bomb wing locking and releasing device and a test method in a connecting rod structure form, belonging to the field of wind tunnel testing. Background Art

[0002] With the demand for missile development, more and more missiles are being developed with folding wings. The aerodynamic force of the missile will undergo large and rapid changes during the wing deployment process, so it is necessary to conduct corresponding wind tunnel tests to assess the deployment performance of the folding wings under the action of aerodynamic force.

[0003] A key technology in the folding wing deployment wind tunnel test is the design and test method of the locking and releasing device of the folding wing. The two commonly used methods are: constantan wire bundling, power-on fusing method, positioning pin locking, and pyrotechnic cutting method. It takes a certain amount of time for the constantan wire to fuse, usually more than 10 mm. During this process, the constantan wire will gradually stretch and deform, causing the wing to begin to unfold, resulting in test errors.

[0004] The disadvantages of the pyrotechnic cutting method are high product quality and high risk, which leads to low test efficiency. Due to the large locking force load, ordinary pin pulling mechanisms cannot meet the requirements. Usually, pyrotechnics are used to pull out the pins or directly cut off the pins using the large energy generated by the explosion of explosives. Pyrotechnics are expensive and disposable products, and multiple products are required for multiple tests. In addition, the use of pyrotechnics in wind tunnel tests requires some additional safety precautions, which affects the test efficiency.

[0005] Therefore, it is urgent to propose a folding wing locking and releasing device and testing method in the form of a connecting rod structure, which can ensure the rapid deployment of the wing, and has low testing cost and high testing efficiency, so as to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problems of high test cost and low test quality in the existing locking and releasing methods in the wind tunnel test of folding wing deployment. 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 folding wing locking and releasing device in the form of a connecting rod structure, comprising a test model, a model support rod and a folding wing, wherein the test model is mounted on the model support rod, and the folding wing is hingedly mounted on the bottom of the test model; further comprising a load-bearing connecting rod assembly, a wing locking hook and an unlocking assembly, wherein the load-bearing connecting rod assembly is mounted on the test model, the load-bearing connecting rod assembly locks or releases the wing locking hook through the unlocking assembly, and when the load-bearing connecting rod assembly locks the wing locking hook through the unlocking assembly, the wing locking hook is connected to the folding wing by a clamping connection;

[0009] The load-bearing connecting rod assembly includes a horizontal support rod, a vertical support rod, an oblique support rod, a first spring, a support frame, a first rotating shaft and a second rotating shaft. The unlocking assembly includes a locking block and a flexible steel wire. The support frame is fixedly installed on the test model. The top of the vertical support rod is provided with a slide groove, and the locking block is slidably installed in the slide groove. The left side of the horizontal support rod establishes a rotation connection with the left side of the support frame through the first rotating shaft, the top right side of the horizontal support rod establishes a card-mounted connection with the left side of the locking block, the right side of the locking block is fixedly connected to the flexible steel wire, the right side of the support frame establishes a coaxial rotation connection with the oblique support rod and the vertical support rod through the second rotating shaft, the left end of the oblique support rod is in contact with the bottom of the horizontal support rod, and the right end of the oblique support rod is hung with a spring-wing locking hook.

[0010] Preferably: the elastic wing locking hook includes a hanging part and a block, the bottom of the hanging part is fixedly installed with a block, the end of the inclined support rod is provided with a hook groove, the folding wing includes a hinged end and a free end, the hinged end of the folding wing is hinged to the test model, when the load-bearing connecting rod assembly locks the elastic wing locking hook through the unlocking assembly, the hanging part is hung in the hook groove, and the free end of the folding wing is clamped on the top of the block.

[0011] Preferably, the unlocking assembly further comprises a second spring, and two ends of the second spring are respectively connected to the locking block and the sliding groove.

[0012] Solution 2: A folding wing locking and releasing test method in the form of a connecting rod structure is implemented based on a folding wing locking and releasing device in the form of a connecting rod structure described in Solution 1, and includes the following steps:

[0013] Step 1, installing the load-bearing connecting rod assembly on the model support rod;

[0014] Step 2: Install the test model on the model support rod

[0015] Step 3, install the wing locking hook, and the load-bearing connecting rod assembly locks the wing locking hook through the unlocking assembly, so that the folding wing is in the wing locking state;

[0016] Step 4. During the test, when the wind tunnel flow field reaches a stable state, pull the flexible steel wire, the locking block slides and compresses the second spring, the locking block moves away from the other side of the horizontal support rod, the horizontal support rod is released, and at the same time the oblique support rod is separated from the abutment and fitting restriction of the horizontal support rod. The oblique support rod swings under the action of the first spring, the elastic wing locking hook slides off the oblique support rod, the folding wing unfolds, and the unlocking is completed, so that the folding wing is in the elastic wing release state.

[0017] The present invention has the following beneficial effects:

[0018] 1. The present invention can ensure rapid deployment of the missile wing, and has low test cost and high test efficiency;

[0019] 2. The present invention locks or releases the wing locking hook through the load-bearing connecting rod assembly and the unlocking assembly, and the locking state is stable and is not easy to become unstable under the disturbance of other external loads such as vibration;

[0020] 3. The design of the load-bearing connecting rod assembly of the present invention has a large load and can be used in the folding wing test with a huge driving torque;

[0021] 4. The external load required for release of the present invention is small, and a small external force can be used to pull the flexible steel wire, thereby pulling open the load-bearing connecting rod assembly and releasing the elastic wing locking hook. The release speed is fast and it can be completely detached within 1-2mm. It is small in size and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of a folding wing locking and releasing device in a connecting rod structure form of the present invention when the wing is in a locked state;

[0023] Figure 2 yes Figure 1 A magnified image of point A;

[0024] Figure 3 It is a diagram of the matching installation of the folding wing locking hook and the folding wing of a folding wing locking and releasing device in a connecting rod structure form of the present invention when the wing is in a locked state;

[0025] Figure 4 It is a three-dimensional diagram of a folding wing locking and releasing device in a connecting rod structure form of the present invention when the wing is in a released state;

[0026] Figure 5 It is a diagram of the matching installation of the folding wing locking and releasing device of a folding wing in a connecting rod structure form of the present invention, when the wing is in the released state;

[0027] Figure 6 This is a diagram of the load-bearing connecting rod assembly of the present invention in use when the wing is locked;

[0028] Figure 7 is a schematic structural diagram of the load-bearing connecting rod assembly of the present invention;

[0029] Figure 8 yes Figure 7 The enlarged view of point B;

[0030] Fig. 9 This is a diagram of the use state of the load-bearing connecting rod assembly of the present invention when the wing is in the released state;

[0031] Fig.10 It is a schematic diagram of the cooperation between the load-bearing connecting rod assembly and the unlocking assembly of the present invention;

[0032] Fig.11 It is a structural schematic diagram of the load-bearing connecting rod assembly and the unlocking assembly of the present invention;

[0033] Fig.12 It is a diagram showing the use state of the load-bearing connecting rod assembly and the unlocking assembly of the present invention;

[0034] In the figure, 1-test model, 2-model support rod, 3-folding wing, 4-bearing connecting rod assembly, 5-elastic wing locking hook, 6-unlocking assembly, 41-horizontal support rod, 42-vertical support rod, 43-oblique support rod, 44-first spring, 45-support frame, 46-slide groove, 47-first rotating shaft, 48-second rotating shaft, 49-hook groove, 51-hanging part, 52-stop block, 61-locking block, 62-flexible steel wire, 63-second spring. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] Specific implementation method 1: Combination Figure 1-Figure 12The present embodiment is described. The present embodiment is a folding wing locking and releasing device in the form of a connecting rod structure, comprising a test model 1, a model support rod 2 and a folding wing 3. The test model 1 is mounted on the model support rod 2, and the folding wing 3 is hingedly mounted on the bottom of the test model 1.

[0038] It also includes a load-bearing link assembly 4, a wing locking hook 5 and an unlocking assembly 6. The load-bearing link assembly 4 is installed on the test model 1. The load-bearing link assembly 4 locks or releases the wing locking hook 5 through the unlocking assembly 6. Because the folding wing 3 itself is subjected to the action of elastic torque, the elastic torque drives the rudder surface to unfold. Therefore, when the load-bearing link assembly 4 locks the wing locking hook 5 through the unlocking assembly 6, the wing locking hook 5 is clamped and connected with the folding wing 3, and the wing locking hook 5 provides an upward pulling force to the folding wing 3 to prevent the folding wing 3 from unfolding.

[0039] The load-bearing connecting rod assembly 4 includes a horizontal support rod 41, a vertical support rod 42, an oblique support rod 43, a first spring 44, a support frame 45, a first rotating shaft 47 and a second rotating shaft 48;

[0040] The unlocking assembly 6 includes a locking block 61 and a flexible steel wire 62;

[0041] The support frame 45 is fixedly installed on the test model 1, and a slide groove 46 is provided on the top of the vertical support rod 42. The locking block 61 is slidably installed in the slide groove 46. The left side of the horizontal support rod 41 establishes a rotation connection with the left side of the support frame 45 through the first rotating shaft 47, and can rotate freely. The top of the right side of the horizontal support rod 41 establishes a card-mounted connection with the left side of the locking block 61, and the right side of the locking block 61 is fixedly connected to the flexible steel wire 62. The right side of the support frame 45 establishes a coaxial rotation connection with the oblique support rod 43 and the vertical support rod 42 through the second rotating shaft 48, and can rotate freely. The left end of the oblique support rod 43 is in contact with the bottom of the horizontal support rod 41, and the right end of the oblique support rod 43 is hung with a wing locking hook 5.

[0042] The contact surface between the horizontal support rod 41 and the oblique support rod 43 is designed to be a coaxial arc surface, and the arc surface axis is the second rotation axis 48, which can ensure that the two contact surfaces of the oblique support rod 43 will not interfere with each other during the rotation process. The coaxial arc surface only allows the oblique support rod 43 to rotate, and the horizontal support rod 41 cannot rotate.

[0043] The vertical support rod 42 is an active rod. Only when the active rod rotates, the horizontal support rod 41, the vertical support rod 42 and the oblique support rod 43 can be released freely and rotate around their own axes respectively.

[0044] The load-bearing connecting rod assembly 4 itself has the function of positioning and retaining. When the right end surface of the horizontal support rod 41 contacts the vertical support rod 42, the two rods are perpendicular to each other, limiting the vertical support rod 42 from rotating counterclockwise.

[0045] In the locked state, Figure 6-8The first spring 44 is in a compressed state, and the first spring 44 applies a counterclockwise torque to the vertical support rod 42, so that the vertical support rod 42 can be prevented from rotating in the clockwise direction, and the movement of the vertical support rod 42 in both rotation directions is restricted and cannot rotate.

[0046] Under the pulling force of the hanging part 51, the oblique support rod 43 has a tendency to rotate clockwise, which is balanced by the pressure provided by the horizontal support rod 41 to prevent the oblique support rod 43 from moving. In this way, the horizontal support rod 41 has a tendency to rotate counterclockwise, which is offset by the pressure provided by the vertical support rod 42. As for the vertical support rod 42, the pressure direction it feels from the horizontal support rod 41 is vertically upward and passes through the center of rotation of the horizontal support rod 41, so no torque is generated, and the vertical support rod 42 has no tendency to move in the rotation direction.

[0047] In addition, a locking block 61 is attached to the horizontal support rod 41 to further increase stability. The locking block 61 and the vertical support rod 42 are in sliding cooperation restricted by the slide groove 46, and the locking block 61 can slide left and right in the horizontally arranged slide groove 46 on the vertical support rod 42. Under normal working conditions, there is only line contact between the locking block 61 and the horizontal support rod 42, and there is no force between the two. In actual wind tunnel tests, the test model 1 will vibrate, which may easily induce loosening of the rod system. In addition, due to the small contact surface between the rod systems, there is a risk of the load-bearing connecting rod assembly 4 opening under high load conditions. However, the design of the locking block 61 can prevent this risk. If the horizontal support rod 41 is to rotate clockwise, the locking block 61 will stop it.

[0048] The locking block 61 of the unlocking assembly 6 cooperates with the horizontally arranged sliding groove 46 in the vertical support rod 42, and can move smoothly in the horizontal direction. The right end of the locking block 61 is connected to the flexible steel wire 52, and the second spring 63 arranged in the locking block 61 bounces the locking block 61 to the left. In this way, if the horizontal support rod 41 loosens and rotates upward, it will collide with the locking block 61, thereby preventing the horizontal support rod 41 from rotating.

[0049] The elastic wing locking hook 5 includes a hanging portion 51 and a stopper 52, the stopper 52 is fixedly installed at the bottom of the hanging portion 51, a hook groove 49 is provided at the end of the inclined support rod 43, the folding wing 3 includes a hinged end and a free end, the hinged end of the folding wing 3 is hinged to the test model 1, when the load-bearing connecting rod assembly 4 locks the elastic wing locking hook 5 through the unlocking assembly 6, the hanging portion 51 is hung in the hook groove 49, and the free end of the folding wing 3 is clamped on the top of the stopper 52.

[0050] The unlocking assembly 6 also includes a second spring 63, and two ends of the second spring 63 are connected to the locking block 61 and the sliding groove 46 respectively.

[0051] In the locked state, Fig.10 and 11 As shown, the horizontal support rod 41 and the vertical support rod 42 form a movement restriction, and the horizontal support rod 41, the vertical support rod 42 and the oblique support rod 43 cannot rotate and are in a stable equilibrium state. When unlocking, the vertical support rod 42 rotates first to release the movement restriction, and the horizontal support rod 41 and the oblique support rod 43 are in a free rotation state. During the rotation of the oblique support rod 43, the elastic wing locking hook 5 is separated from the oblique support rod 43, and the folding wing 3 is unfolded.

[0052] In unlocked state, Fig. 9 and 12 As shown, the locking block 61 is connected to the flexible steel wire 62, and the flexible steel wire 62 is pulled to the right by an external tensile force. The flexible steel wire 62 pulls the locking block 61 to move to the right. At the same time, the locking block 61 pulls the vertical support rod 42 to move. Due to the limitation of the freedom of movement, the vertical support rod 42 can only rotate around the second rotating shaft 48, and the vertical support rod 42 rotates to the right.

[0053] Driven by the tension of the elastic wing locking hook 5, the oblique support rod 43 tends to rotate clockwise. When the vertical support rod 42 rotates to the right, the constraint between the vertical support rod 42 and the horizontal support rod 41 is disengaged, the horizontal support rod 41 rotates counterclockwise, and the oblique support rod 43 rotates clockwise. The elastic wing locking hook 5 disengages from the hook groove 49 of the oblique support rod 43, and the folding wing 3 begins to unfold under the action of its own elastic driving torque.

[0054] Specific implementation method 2: Combination Figure 1-Figure 4 This embodiment is described. A folding wing locking and releasing test method of a connecting rod structure in this embodiment is implemented by relying on a folding wing locking and releasing device of a connecting rod structure in the specific embodiment 1, and includes the following steps:

[0055] Step 1, installing the load-bearing connecting rod assembly 4 on the model support rod 2;

[0056] Step 2, installing the test model 1 on the model support rod 2;

[0057] Step 3, install the wing locking hook 5, the load-bearing connecting rod assembly 4 locks the wing locking hook 5 through the unlocking assembly 6, so that the folding wing 3 is in the wing locking state, such as Figure 1-3 As shown;

[0058] Step 4. During the test, when the wind tunnel flow field reaches a stable state, the flexible steel wire 62 is pulled, the locking block 61 slides and compresses the second spring 63, the locking block 61 moves away from the other side of the horizontal support rod 41, the horizontal support rod 41 is released, and at the same time, the oblique support rod 43 is separated from the abutment and fitting restriction of the horizontal support rod 41, and the oblique support rod 43 swings under the action of the first spring 44, the elastic wing locking hook 5 slides off the oblique support rod 43, the folding wing 3 is unfolded, and the unlocking is completed, so that the folding wing 3 is in the elastic wing release state, as shown in FIG. Figure 4-5 shown.

[0059] 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.

[0060] 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 folding wing locking and releasing device in the form of a connecting rod structure, comprising a test model (1), a model support rod (2) and a folding wing (3), wherein the test model (1) is mounted on the model support rod (2), and the folding wing (3) is hingedly mounted on the bottom of the test model (1), characterized in that: The invention comprises a load-bearing connecting rod assembly (4), a wing locking hook (5) and an unlocking assembly (6); the load-bearing connecting rod assembly (4) is installed on a test model (1); the load-bearing connecting rod assembly (4) locks or releases the wing locking hook (5) through the unlocking assembly (6); when the load-bearing connecting rod assembly (4) locks the wing locking hook (5) through the unlocking assembly (6), the wing locking hook (5) is clamped and connected with the folding wing (3); The load-bearing connecting rod assembly (4) comprises a horizontal support rod (41), a vertical support rod (42), an oblique support rod (43), a first spring (44), a support frame (45), a first rotating shaft (47) and a second rotating shaft (48); the unlocking assembly (6) comprises a locking block (61) and a flexible steel wire (62); the support frame (45) is fixedly mounted on the test model (1); the top of the vertical support rod (42) has a sliding groove (46); the locking block (61) is slidably mounted in the sliding groove (46); the horizontal support rod (41) The left side is connected to the left side of the support frame (45) through a first rotating shaft (47), the top of the right side of the horizontal support rod (41) is connected to the left side of the locking block (61) by a clamping connection, the right side of the locking block (61) is fixedly connected to the flexible steel wire (62), the right side of the support frame (45) is connected to the oblique support rod (43) and the vertical support rod (42) through a second rotating shaft (48), the left end of the oblique support rod (43) is in contact with the bottom of the horizontal support rod (41), and the right end of the oblique support rod (43) is hung with a wing locking hook (5).

2. A folding wing locking and releasing device with a connecting rod structure according to claim 1, characterized in that: The elastic wing locking hook (5) comprises a hanging portion (51) and a stopper (52), the stopper (52) being fixedly mounted at the bottom of the hanging portion (51), a hook groove (49) being arranged at the end of the oblique support rod (43), the folding wing (3) comprising a hinged end and a free end, the hinged end of the folding wing (3) being hinged to the test model (1), when the load-bearing connecting rod assembly (4) locks the elastic wing locking hook (5) through the unlocking assembly (6), the hanging portion (51) is hung in the hook groove (49), and the free end of the folding wing (3) is clamped on the top of the stopper (52).

3. A folding wing locking and releasing device with a connecting rod structure according to claim 2, characterized in that: The unlocking assembly (6) further comprises a second spring (63), and two ends of the second spring (63) are respectively connected to the locking block (61) and the sliding groove (46).

4. A method for testing the locking and releasing of folding wing with a connecting rod structure, which is realized by the locking and releasing device for folding wing with a connecting rod structure as claimed in claim 3, and is characterized in that: The following steps are involved: Step 1, installing the load-bearing connecting rod assembly (4) on the model support rod (2); Step 2: Install the test model (1) on the model support rod (2) Step 3, installing the wing locking hook (5), the load-bearing connecting rod assembly (4) locks the wing locking hook (5) through the unlocking assembly (6), so that the folding wing (3) is in the wing locking state; Step 4. During the test, when the wind tunnel flow field reaches a stable state, the flexible steel wire (62) is pulled, the locking block (61) slides and compresses the second spring (63), the locking block (61) moves away from the other side of the horizontal support rod (41), the horizontal support rod (41) is released, and at the same time the oblique support rod (43) is separated from the abutment and fitting restriction of the horizontal support rod (41), the oblique support rod (43) swings under the action of the first spring (44), the elastic wing locking hook (5) slides off the oblique support rod (43), the folding wing (3) unfolds, and the unlocking is completed, so that the folding wing (3) is in the elastic wing release state.

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