Integrated supporting structure suitable for rocket sled with large length-diameter ratio

Abstract

The invention provides an integrated supporting structure suitable for a rocket sled with a large length-diameter ratio. The integrated supporting structure mainly solves the problem that in the prior art, a rocket sled supporting structure cannot meet requirements of large-diameter, large-length-diameter-ratio and thin-wall type tested objects. According to the integrated supporting structure suitable for the rocket sled with the large length-diameter ratio, a base plate, a main plate and a sealing plate are adopted to form the supporting structure similar to a tetrahedron, and the end face of the main plate is a curved surface; supporting ribs are arranged in a cavity formed by the bottom plate, the main plate and the sealing plate; a plurality of through holes are formed in the edge of the main plate, and threaded sleeves are arranged in the through holes. When in use, the support structure is fixedly connected with a tested object by the buckle through a screw; the device is suitable for a large-diameter and large-length-diameter-ratio thin-wall tested object, the structural stability is good, the strength is high, the curved surface area of the main plate is large, the pressure intensity of a contact surface is effectively reduced, and the problem of local stress concentration of the thin-wall tested object is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of military product shooting range tests and relates to an integrated support structure for a rocket sled. Background Art

[0002] Rocket Sled is a test device that uses rocket engines to achieve high-speed gliding on a fixed track. Its origin can be traced back to the 1940s. It is mainly used to simulate high-speed flight environments on the ground and conduct research on aerodynamics, material properties, impact tests, etc. Rocket sled technology provides important support for scientific research and development in the fields of weapons and equipment, aerospace, etc. The recovery rocket sled system is mainly composed of a thrust system, a sled, a track, and a data acquisition system. The thrust system usually uses a solid engine to provide system thrust; the sled is used as a test installation platform and can carry various test items. The specific sled type is customized according to the test requirements; the track provides support for the operation of the rocket sled, usually using steel rails; the data acquisition system is used to collect and record real-time data such as vibration and overload during the operation of the sled. Conventional recovery rocket sled tests are mostly seeker recovery tests. The length and diameter of the test item are small. Its diameter is less than the span of the two tracks, generally 0.2 to 0.5 times the span, and the aspect ratio is generally 3 to 8. The supporting structure of this type of product is mostly "⊥" type, which cannot meet the support requirements of thin-walled test products with a diameter greater than the span of two rails and an aspect ratio greater than 15. Therefore, it is necessary to design a new type of supporting structure to meet the test requirements of this type of test products. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art and to solve the problem that the rocket skid support structure in the prior art cannot meet the needs of large diameter, large aspect ratio and thin-walled test products, an integrated support structure suitable for a large aspect ratio rocket skid is provided.

[0004] An integrated support structure suitable for a rocket sled with a large aspect ratio, comprising a base plate 5, a main plate 2, a first closing plate 4, a second closing plate 10, a first main supporting rib 7, a second main supporting rib 7' and a fastener 1; the base plate 5 is an obtuse-angled triangular plate; the first main supporting rib 7 and the second main supporting rib 7' are arranged on the end surface of the base plate 5; the first main supporting rib 7 and the second main supporting rib 7' are both triangular plates; the first main supporting rib 7 and the second main supporting rib 7' are perpendicular to the base plate 5; the first main supporting rib 7 and the second main supporting rib 7' are arranged on both sides of the height of the side corresponding to the obtuse angle of the base plate 5; of the two sides of the obtuse angle of the base plate 5, the first closing plate 4 is arranged on one side, and the second closing plate 10 is arranged on the other side; the first closing plate 4 and the second closing plate 10 are both right-angled trapezoids; the right-angle waist of the first closing plate 4 and the The end face of the first supporting rib 7 is fixedly connected; the right-angle waist of the second sealing plate 10 is fixedly connected to the end face of the second main supporting rib 7'; the angle between the first sealing plate 4 and the second sealing plate 10 and the bottom plate 5 is less than 90 degrees; the main board 2 is fixedly arranged on the edge corresponding to the obtuse angle of the bottom plate 5; the main board 2 is a trapezoid; the two waists of the main board 2 are respectively fixedly connected to the non-right-angle waist of the first sealing plate 4 and the non-right-angle waist of the second sealing plate 10; the end face of the main board 2 is a curved surface; the waist of the first main supporting rib 7 close to the edge corresponding to the obtuse angle of the bottom plate 5 and the waist of the second main supporting rib 7' close to the edge corresponding to the obtuse angle of the bottom plate 5 are fixedly connected to the main board 2; a plurality of through holes are arranged on the upper four edges of the end face of the main board 2; screw sleeves are arranged in the through holes; fasteners 1 are arranged on the screw sleeves; the fasteners 1 are fixed to the main board 2 by bolts.

[0005] Furthermore, the fastener 1 includes a double-sided four-screw fastener, a double-sided two-screw fastener and a single-screw fastener;

[0006] The double-sided four-screw fastener is rectangular; a groove is provided on the bottom surface of the double-sided four-screw fastener; ears are provided on the long side edges of the bottom surface of the double-sided four-screw fastener; the ears are perpendicular to the side of the fastener 1; a pair of through holes are provided on the end surface of the ears;

[0007] The double-sided two-screw fastener is rectangular; a groove is arranged on the bottom surface of the double-sided two-screw fastener; ears are arranged on the long side edges of the bottom surface of the double-sided two-screw fastener; the ears are perpendicular to the side surface of the fastener 1; a through hole is arranged on the end surface of the ears;

[0008] The single screw fastener is rectangular; a groove is arranged on the bottom surface of the single screw fastener; a lug is arranged on a long side edge of the bottom surface; the lug is perpendicular to the side surface of the fastener 1; and a through hole is arranged on the end surface of the lug.

[0009] Furthermore, the bottom plate 5, the main plate 2, the first closing plate 4 and the second closing plate 10 form a chamber, and a plurality of reinforcing ribs 6 parallel to the first main supporting ribs 7 are arranged in the chamber; the reinforcing ribs 6 are triangular plates.

[0010] Furthermore, a third sealing plate 11 is provided between the first main supporting rib 7 and the second main supporting rib 7'.

[0011] Furthermore, the end surface of the main board 2 is determined according to the shape of the test object.

[0012] Furthermore, the bottom plate 5, the main plate 2, the first sealing plate, the second sealing plate and the third sealing plate are integrally formed.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention is applicable to thin-walled test pieces with large diameters and large aspect ratios, and is not limited by the length and mass of the test pieces. It only requires the selection of support structures of different logarithms according to the needs.

[0015] 2. The supporting structure of the present invention is a tetrahedral structure with good stability and high strength;

[0016] 3. Under the same load conditions, the mass of the integrated support structure of the present invention is relatively small;

[0017] 4. The support structure of the present invention has a small windward area and has little impact on the flow field of the test product;

[0018] 5. The inner arc surface area of ​​the mainboard of the support structure of the present invention is large, which effectively reduces the pressure on the contact surface and avoids local stress concentration of thin-walled test products;

[0019] 6. The use of fasteners in the support structure of the present invention increases the strength and reliability of the connection and avoids the risk of thin walls being crushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the support structure of the present invention; (a) is a front perspective view of the support structure; (b) is a back perspective view of the support structure;

[0021] Figure 2 This is a schematic diagram of removing the sealing plate of the present invention;

[0022] Figure 3 It is a schematic diagram of a main board with an embedded screw sleeve of the present invention;

[0023] Figure 4 Schematic diagrams of fasteners of the present invention; wherein (a) is a double-sided four-screw fastener, (b) is a double-sided two-screw fastener, and (c) is a single-screw fastener;

[0024] Figure 5 It is a schematic diagram of the fastener of the present invention being mounted on the ring reinforcement or main reinforcement of the test product;

[0025] Figure 6 It is a schematic diagram of the use of the present invention;

[0026] In the figure, 1 is a fastener; 2 is a main board; 3 is a bolt; 4 is a first closing plate; 5 is a bottom plate; 6 is a reinforcing rib; 7 is a first main supporting rib; 7' is a first main supporting rib; 8 is a sliding shoe connecting plate; 9 is a circular screw sleeve; 10 is a second closing plate; 11 is a third closing plate. DETAILED DESCRIPTION

[0027] An integrated support structure suitable for a rocket sled with a large aspect ratio, comprising a bottom plate 5, a main plate 2, a first closing plate 4, a second closing plate 10, a third closing plate 11, a first main supporting rib 7, a second main supporting rib 7' and a fastener 1;

[0028] The bottom plate 5 is an obtuse-angled triangular plate; the first main supporting rib 7 and the second main supporting rib 7' are arranged on the end surface of the bottom plate 5; the first main supporting rib 7 and the second main supporting rib 7' are both triangular plates; the first main supporting rib 7 and the second main supporting rib 7' are perpendicular to the bottom plate 5; the first main supporting rib 7 and the second main supporting rib 7' are arranged on both sides of the height of the side corresponding to the obtuse angle of the bottom plate 5; of the two sides of the obtuse angle of the bottom plate 5, the first sealing plate 4 is arranged on one side, and the second sealing plate 10 is arranged on the other side; the first sealing plate 4 and the second sealing plate 10 are both right-angled trapezoids; the right-angle waist of the first sealing plate 4 is fixedly connected to the end surface of the first supporting rib 7; the right-angle waist of the second sealing plate 10 is fixedly connected to the end surface of the second main supporting rib 7'; the angle between the first sealing plate 4 and the second sealing plate 10 and the bottom plate 5 is less than 90 degrees. The main board 2 is fixedly arranged on the long side of the bottom plate 5; the main board 2 is trapezoidal; the two waists of the main board 2 are respectively fixedly connected to the non-right-angle waist of the first closing plate 4 and the non-right-angle waist of the second closing plate 10; the end face of the main board 2 is a curved surface; the waist of the first main supporting rib 7 and the waist of the second main supporting rib 7' are fixedly connected to the main board 2; the end face of the main board 2 adopts an arc surface with a large area angle, which effectively reduces the pressure on the contact surface and avoids local stress concentration of thin-walled test products;

[0029] A plurality of through holes are arranged along four sides on the end surface of the main board 2; a screw sleeve is arranged in the through hole; a fastener 1 is arranged on the screw sleeve; the fastener 1 is fixed to the main board 2 by bolts; the fastener 1 increases the strength and reliability of the connection and avoids the risk of the thin wall being crushed;

[0030] The bottom plate 5, the main plate 2, the first closing plate 4 and the second closing plate 10 form a chamber, and a plurality of reinforcing ribs 6 parallel to the first main supporting ribs 7 are arranged in the chamber; the reinforcing ribs 6 are triangular plates;

[0031] A third sealing plate 11 is provided between the first main supporting rib 7 and the second main supporting rib 7';

[0032] The curved surface of the main board 2 is determined according to the shape of the test object;

[0033] The bottom plate 5, the main plate 2, the first sealing plate, the second sealing plate and the third sealing plate are integrally formed;

[0034] The fastener 1 includes a double-sided four-screw fastener, a double-sided two-screw fastener and a single-screw fastener;

[0035] The double-sided four-screw fastener is rectangular; a groove is provided on the bottom surface of the double-sided four-screw fastener; ears are provided on the long side edges of the bottom surface of the double-sided four-screw fastener; the ears are perpendicular to the side of the fastener 1; a pair of through holes are provided on the end surface of the ears;

[0036] The double-sided two-screw fastener is rectangular; a groove is arranged on the bottom surface of the double-sided two-screw fastener; ears are arranged on the long side edges of the bottom surface of the double-sided two-screw fastener; the ears are perpendicular to the side surface of the fastener 1; a through hole is arranged on the end surface of the ears;

[0037] The single screw fastener is rectangular; a groove is arranged on the bottom surface of the single screw fastener; a lug is arranged on one long side edge of the bottom surface; the lug is perpendicular to the side surface of the fastener 1; a through hole is arranged on the end surface of the lug; the fastener is used to enhance the strength of the thin-walled test piece, increase the reliability of the connection, and prevent the connection from being crushed.

[0038] Fastener 1 is mounted on the ring reinforcement or main reinforcement of the test piece, such as Figure 5 As shown, it is used to increase the strength and reliability of the connection. Bolts connect the test piece and the supporting structure through fasteners;

[0039] The present invention is an integrated support structure, including a main board, main support ribs, a bottom plate, a sealing plate, a sliding shoe connecting plate, reinforcing ribs, screw sleeves, bolts and fasteners. Except for the bolts and fasteners, the remaining parts are welded to form a tetrahedron-like structure. The sliding shoe connecting plate is welded to the bottom for installing the sliding shoe. A circular screw sleeve is embedded on the main board and is connected to the test piece by bolts. The fasteners are used to enhance the strength of the thin-walled test piece, increase the reliability of the connection, and prevent the connection from being crushed. The curvature of the main board of the present invention is determined by the curvature of the outer surface of the test piece, and the size and number of the bolts used for the connection are determined based on the mass of the test piece, the operating overload on the sled and other parameters, taking into account the safety factor.

[0040] The present invention is realized in that: when conducting a rocket sled test, at least four integrated support structures need to be installed on the rocket sled.

[0041] The present invention is also achieved in that the main board, the main supporting ribs and the sealing plate together form a tetrahedron structure, which has a strong specific weight bearing capacity and a stable and reliable structure.

[0042] The present invention is also realized in that: the curvature of the mainboard is determined by the curvature of the contact surface between the test object and the support structure, which can meet the connection requirements of different test objects.

[0043] The present invention is also realized in that: the supporting structure is supported by triangular reinforcing ribs inside, thereby increasing the rigidity of the supporting structure as a whole. Weight-reducing holes can be opened inside the reinforcing ribs to meet quality requirements.

[0044] The present invention is also implemented by using fasteners to clamp onto the main reinforcement inside the test object, and then connecting the test object and the supporting structure through bolts through the fasteners, thereby enhancing the strength and reliability of the connection and avoiding the risk of thin walls being crushed.

[0045] The present invention is also achieved by designing fasteners of different sizes and forms to adapt to the internal structure of the test object.

[0046] The present invention is also realized by: after the main body of the support structure is processed, holes are matched together with the test object, and after the holes are matched, the circular screw sleeve is embedded in the main board of the support structure, so as to connect the test object and the support structure together.

[0047] The present invention is also implemented in that the sealing plate can be welded at the test site after the sensor is installed, which is convenient for the installation and wiring of the sensor.

[0048] The present invention is also realized in that: according to the length of the test object, different logarithmic support structures can be selected to meet the needs of different test objects.

[0049] The present invention is described in detail below with reference to the accompanying drawings.

[0050] Embodiment 1:

[0051] For large aspect ratio and thin-walled parts, an integrated support structure is designed for the sled connection interface and form under this type of specific complex structural form. Its function is to provide support for the test object and to reliably fix the test object on the rocket sled during high-speed sliding. Since the overload generated by the rocket sled during high-speed sliding is relatively large, the structure meets the requirements of rigidity, strength, and can achieve large mass and supersonic recovery rocket sled test requirements. Typical forms of support structures are as follows: Figure 1 The product sled of the double-track rocket sled requires at least four (two pairs) such support structures, and their installation positions are determined according to parameters such as the length of the test product and the center of mass position.

[0052] The present invention is an integrated support structure. Figure 1 , Figure 2 , including the main board, main support ribs, bottom plate, cover plate, sliding shoe connecting plate, reinforcing ribs, screw sleeves, bolts and fasteners. The main board, main support ribs, bottom plate, cover plate and reinforcing ribs are welded together to form a tetrahedron structure. A sliding shoe connecting plate is welded at one end of the bottom for installing the sliding shoe. The main board is the connection interface of the test product, such as Figure 3As shown in the figure, the round screw sleeve is embedded in the main board, and then the test object and the main board are fixed securely by bolts. There are many kinds of fasteners designed according to the internal structure of the test object, such as Figure 4 The fasteners are clamped on the ring reinforcement or main reinforcement of the test piece, such as Figure 5 As shown, bolts are used to connect the test piece and the supporting structure through fasteners to increase the strength and reliability of the connection.

[0053] When the present invention is used to conduct a ground simulation test of a rocket vibration dynamics environment, the test object is firmly fixed on the supporting structure, the maximum test speed exceeds the speed of sound, and is successfully recovered. The test is a complete success and achieves the expected purpose.

[0054] In summary, the integrated support structure of the present invention is composed of a main board, main support ribs, a bottom plate, a sealing plate, and reinforcing ribs. The shape is a tetrahedral structure, and a sliding shoe connecting plate is welded at the bottom for connecting the sliding shoe. The support structure is connected to the test object by bolts. The main board of the present invention can be adaptively designed according to the curvature of the test object, and the position of the main support ribs is determined according to the position of the internal annular ribs or main ribs of the test object. The number of bolts is determined according to strength calculations. The structure has a strong bearing capacity and high rigidity, and can meet the rocket sled test requirements of such large-diameter, large-aspect-ratio, and thin-walled test objects.

Claims

1. An integrated support structure for a rocket sled with a large aspect ratio, characterized in that: The invention comprises a bottom plate (5), a main plate (2), a first sealing plate (4), a second sealing plate (10), a first main supporting rib (7), a second main supporting rib (7') and a fastener (1); the bottom plate (5) is an obtuse-angled triangular plate; the first main supporting rib (7) and the second main supporting rib (7') are arranged on the end surface of the bottom plate (5); the first main supporting rib (7) and the second main supporting rib (7') are both triangular plates; the first main supporting rib (7) and the second main supporting rib (7') are perpendicular to the bottom plate (5); the first main supporting rib (7) and the second main supporting rib (7') are arranged on both sides of the height of the side corresponding to the obtuse angle of the bottom plate (5); of the two sides of the obtuse angle of the bottom plate (5), the first sealing plate (4) is arranged on one side and the second sealing plate (10) is arranged on the other side; the first sealing plate (4) and the second sealing plate (10) are both right-angled trapezoids; the right angle of the first sealing plate (4) is located at The waist of the second sealing plate (10) is fixedly connected to the end face of the first supporting rib 7; the waist of the second sealing plate (10) at the right angle is fixedly connected to the end face of the second main supporting rib (7'); the main board (2) is fixedly arranged on the side corresponding to the obtuse angle of the bottom plate (5); the main board (2) is a trapezoid; the two waists of the main board (2) are respectively fixedly connected to the non-right-angle waist of the first sealing plate (4) and the non-right-angle waist of the second sealing plate (10); the end face of the main board (2) is a curved surface; the waist of the first main supporting rib (7) close to the side corresponding to the obtuse angle of the bottom plate (5) is fixedly connected to the main board (2); the waist of the second main supporting rib (7') close to the side corresponding to the obtuse angle of the bottom plate (5) is fixedly connected to the main board (2); a plurality of through holes are arranged on the end face of the main board (2) along four sides; screw sleeves are arranged in the through holes; a fastener (1) is arranged on the screw sleeve; the fastener (1) is fixed to the main board (2) by bolts.

2. The integrated support structure for a rocket sled with a large aspect ratio according to claim 1, characterized in that: The fastener 1 includes a double-sided four-screw fastener, a double-sided two-screw fastener and a single-screw fastener; the double-sided four-screw fastener is rectangular; a groove is provided on the bottom surface of the double-sided four-screw fastener; ears are respectively provided on the long side edges of the bottom surface of the double-sided four-screw fastener; the ears are perpendicular to the side of the fastener 1; a pair of through holes are provided on the end surface of the ears; the double-sided two-screw fastener is rectangular; a groove is provided on the bottom surface of the double-sided two-screw fastener; ears are respectively provided on the long side edges of the bottom surface of the double-sided two-screw fastener; the ears are perpendicular to the side of the fastener 1; a through hole is provided on the end surface of the ears; the single-screw fastener is rectangular; a groove is provided on the bottom surface of the single-screw fastener; an ear is provided on one long side edge of the bottom surface; the ears are perpendicular to the side of the fastener 1; a through hole is provided on the end surface of the ears.

3. The integrated support structure for a rocket sled with a large aspect ratio according to claim 1, characterized in that: The bottom plate (5), the main plate (2), the first closing plate (4) and the second closing plate (10) form a chamber, in which a plurality of reinforcing ribs 6 parallel to the first main supporting ribs (7) are arranged; the reinforcing ribs 6 are triangular plates.

4. The integrated support structure for a rocket sled with a large aspect ratio according to claim 1, characterized in that: The included angles between the first sealing plate (4) and the second sealing plate (10) and the bottom plate (5) are less than 90 degrees.

5. The integrated support structure for a rocket sled with a large aspect ratio according to claim 1, characterized in that: A third sealing plate (11) is arranged between the first main supporting rib (7) and the second main supporting rib (7').

6. The integrated support structure for a rocket sled with a large aspect ratio according to claim 5, characterized in that: The bottom plate (5), the main plate (2), the first sealing plate, the second sealing plate and the third sealing plate are integrally formed.

7. The integrated support structure for a rocket sled with a large aspect ratio according to claim 6, characterized in that: The end surface of the main board (2) is determined according to the appearance of the test object.

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