A device for loading test of standard adhesive test specimen of high-energy propellant and liner

Abstract

This invention discloses a loading test device for standard bonding specimens of high-energy propellants and liners, relating to the field of propellant testing technology. It includes a base, a housing, and symmetrically distributed cylinders fixed to the base. Symmetrically distributed sliding cylinders are fixed to the housing. Each symmetrically distributed cylinder is fixed with a sliding plate, which slides in a sliding fit with the sliding cylinder. Each symmetrically distributed sliding cylinder is slidably connected to a sliding seat. A sealed cavity is provided between the sliding plate and the sliding seat. The base includes a concentric assembly, the sliding seat includes a leveling assembly, the leveling assembly includes a clamping assembly, and the clamping assembly includes an adhesion assembly. This invention, through the cooperation of the cylinders and sliding plates, increases the cavity volume between the sliding plate and the sliding seat, reducing its internal pressure. This allows the gas inside the housing to apply a uniform pushing force to the sliding seat, avoiding uneven pushing force on the sliding seat, which would lead to asymmetrical tensile force on the propellant and unreliable test data.

Description

Technical Field

[0001] This invention relates to the field of propellant testing technology, and in particular to a loading test device for standard bonding specimens of high-energy propellants and liners. Background Technology

[0002] Loading tests on standard bonding specimens of solid propellant and liner need to be conducted under three factors: pressure, temperature, and loading force, which simulates the special environment during solid rocket motor ignition. Since the solid propellant grain structure is extremely susceptible to damage during solid rocket motor ignition, it is necessary to test and inspect the standard bonding specimens of solid propellant and liner before application, thereby improving the integrity of the solid propellant grain structure.

[0003] Currently, most solid propellant and liner standard bonding test specimen loading devices use a lead screw to drive a sliding seat and its upper sliding frame to stretch the solid propellant. After long-term use, problems such as aging and wear of the sliding frame can easily lead to different heights on both sides of the sliding frame, causing the solid propellant to be stretched at an angle, resulting in errors in the test data. Furthermore, when the solid propellant is stretched, the solid propellant retracts and deforms, causing the fixed inclined surface of the solid propellant to separate from the clamp, reducing the clamping area between the clamp and the solid propellant, which in turn causes excessive concentration of tensile stress, leading to solid propellant fracture. Summary of the Invention

[0004] This invention provides a loading test apparatus for standard bonding specimens of high-energy propellants and liners, aiming to solve the problems mentioned in the background art.

[0005] The technical solution of the present invention is as follows: a loading test device for a standard bonding specimen of high-energy propellant and liner, comprising a base, a shell provided on the base, symmetrically distributed cylinders fixedly connected to the base, symmetrically distributed sliding cylinders fixedly connected to the shell, each symmetrically distributed cylinder being fixedly connected to a sliding plate, the sliding plate slidingly engaging with an adjacent sliding cylinder, each symmetrically distributed sliding cylinder being slidably connected to a sliding seat, a sealed cavity provided between the sliding plate and the sliding seat, the cooperation of the sliding plate and the sliding seat increasing the volume of the cavity between them and reducing the gas pressure in the cavity between the sliding plate and the sliding seat, the base being provided with a concentric assembly for fixing the propellant, the sliding seat being provided with a leveling assembly for leveling the propellant, the leveling assembly being provided with a clamping assembly for holding the propellant, and the clamping assembly being provided with a bonding assembly for stabilizing tensile stress.

[0006] As a preferred embodiment of the present invention, the volume and pressure of the sealed cavity between the symmetrically distributed sliding plates and the adjacent sliding seats are the same.

[0007] As a preferred embodiment of the present invention, the concentric assembly includes a fixed frame, which is fixedly connected to the base. The fixed frame is slidably connected to symmetrically distributed concentric rings. The fixed frame is provided with symmetrically distributed insert shafts, which are all limited to adjacent concentric rings. The concentric rings are slidably connected to circumferentially distributed extrusion shafts. Clamping blocks are fixedly connected to the opposing sides of the circumferentially distributed extrusion shafts. Extrusion springs are fixedly connected between the clamping blocks and the concentric rings.

[0008] As a preferred embodiment of the present invention, the clamping block is a fastening block with a 90° angle, used to ensure close contact between the clamping block and the propellant.

[0009] As a preferred embodiment of the present invention, the leveling assembly includes a spirit level, which is fixedly connected to symmetrically distributed concentric rings. A sliding seat is slidably connected to a sliding circular plate, and the sliding seat is rotatably connected to a first threaded shaft, which is threadedly connected to the sliding circular plate.

[0010] As a preferred embodiment of the present invention, the clamping assembly includes symmetrically distributed clamping plates, which are slidably connected to adjacent sliding circular plates. Each symmetrically distributed clamping plate is hinged with a symmetrically distributed hinge rod. The sliding circular plates are rotatably connected to sliding rings. The hinge rods are hinged to adjacent sliding rings. The sliding circular plates are rotatably connected to a second threaded shaft, which is threaded to adjacent sliding rings.

[0011] As a preferred embodiment of the present invention, the bonding component includes symmetrically distributed T-shaped plates, which are respectively fixedly connected to adjacent clamping plates. The T-shaped plates are hinged to bonding plates and fixedly connected to annular slide rods. The bonding plates are slidably connected to adjacent annular slide rods. A first return spring is fixedly connected between the bonding plates and the T-shaped plates. The T-shaped plates are provided with limiting components for limiting the bonding plates.

[0012] As a preferred embodiment of the present invention, the limiting component includes an annular limiting rod, which is slidably connected to a T-shaped plate. A limiting block is slidably connected to the T-shaped plate, and the limiting block and the annular limiting rod are mutually limiting. A second return spring is fixedly connected between the limiting block and the T-shaped plate.

[0013] As a preferred embodiment of the present invention, the limiting block is fixedly connected to a reset frame, the reset frame is slidably connected to a retaining shaft, the T-shaped plate is provided with a limiting hole, and the retaining shaft and the limiting hole are matched for limiting.

[0014] As a preferred embodiment of the present invention, a pressure gauge for recording test pressure values ​​is fixedly connected to the outer casing, and a temperature gauge for recording test temperature values ​​is fixedly connected to the outer casing.

[0015] Compared with the prior art, the present invention has the following advantages: 1. By cooperating with the cylinder and the sliding plate, the volume of the cavity between the sliding plate and the sliding seat is increased, the internal pressure is reduced, and the gas in the outer shell applies a uniform pushing force to the sliding seat, avoiding uneven thrust of the sliding seat, which leads to asymmetrical tensile force of the sliding seat on the propellant, resulting in unreliable test data.

[0016] 2. When stretching the propellant, the propellant is fixed at the central axis of the concentric ring by the cooperation of the concentric ring and the clamping block to avoid the propellant tilting, which would lead to asymmetrical tensile force and cause errors in the test data.

[0017] 3. The propellant is clamped by the second threaded shaft and the clamping plate to prevent the propellant from sliding and falling off the bonding plate under the tension force, which would lead to test failure and waste of resources. The level is used to check whether the propellant clamping height is tilted. The height of the sliding circular plate is adjusted by the first threaded shaft to prevent the clamping core from shifting when clamping the propellant due to the aging of the clamping plate, which would cause the propellant to be stretched at an angle and cause test errors.

[0018] 4. The T-shaped plate and the ring-shaped limiting rod work together to keep the bonding plate always in contact with the fixed inclined surface of the propellant. This prevents the bonding plate from separating from the fixed inclined surface of the propellant when the propellant is deformed by tensile force. This would prevent the clamping force of the sliding clamp on the propellant and the tensile force of the sliding seat from acting on the intersection of the fixed inclined surface of the propellant and the horizontal plane, which would cause excessive stress concentration and propellant breakage. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional perspective view of the outer casing of the present invention.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the concentric component of the present invention.

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the concentric ring and clamping block of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the leveling component of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the clamping assembly and the bonding assembly of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the limiting component of the present invention.

[0026] Wherein: 101-base, 102-outer shell, 103-cylinder, 104-sliding cylinder, 105-sliding plate, 106-sliding seat, 2-concentric assembly, 201-fixed frame, 202-concentric ring, 203-insertion shaft, 204-compression shaft, 205-clamping block, 206-compression spring, 3-leveling assembly, 301-level, 302-sliding circular plate, 303-first threaded shaft, 4-clamping assembly, 401-clamping plate. 402-Hinged rod, 403-Sliding ring, 404-Second threaded shaft, 5-Adhesion assembly, 501-T-shaped plate, 502-Adhesion plate, 503-Annular slide bar, 504-First return spring, 6-Limiting assembly, 601-Annular limiting rod, 602-Limiting block, 603-Second return spring, 604-Reset frame, 605-Clip shaft, 606-Limiting hole, 701-Pressure gauge, 702-Thermometer, 8-Propellant. Detailed Implementation

[0027] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes. Example 1

[0028] A loading test apparatus for standard bonding specimens of high-energy propellants and liners, such as Figure 1 and Figure 2As shown, the device includes a base 101, a housing 102, a pressure gauge 701 for recording test pressure values, a temperature gauge 702 for recording test temperature values, two symmetrically distributed cylinders 103 fixedly connected to the base 101, two symmetrically distributed sliding cylinders 104 fixedly connected to the housing 102, and sliding plates 105 fixedly connected to each of the two symmetrically distributed cylinders 103. The two sliding plates 105 are slidably engaged with adjacent sliding cylinders 104. Sliding seats 106 are slidably connected to each of the two symmetrically distributed sliding cylinders 104. A sealed cavity is provided between the sliding plates 105 and the sliding seats 106. The sealed cavity has the same volume and pressure, which is used to push two symmetrically distributed sliding seats 106 with the same negative pressure. The gas in the cavity between the sliding plate 105 and the sliding seat 106 applies a uniform pulling force to the sliding seat 106 through the negative pressure. The negative pressure of the gas in the cavity between the sliding plate 105 and the sliding seat 106 uniformly drives the two symmetrically distributed sliding seats 106 to slide back to back to stretch the propellant 8. The base 101 is provided with a concentric component 2 for fixing the propellant 8. The sliding seat 106 is provided with a leveling component 3 for leveling the propellant 8. The leveling component 3 is provided with a clamping component 4 for holding the propellant 8. The clamping component 4 is provided with a bonding component 5 for stabilizing the tensile stress. The concentric component 2 and the leveling component 3 cooperate to ensure that the propellant 8 is always stretched horizontally during stretching.

[0029] like Figure 3 and Figure 4 As shown, the concentric assembly 2 includes a fixing frame 201, which is fixedly connected to the base 101. Two symmetrically distributed concentric rings 202 are slidably connected to the fixing frame 201. Two symmetrically distributed insert shafts 203 are threadedly connected to the fixing frame 201. Each of the two symmetrically distributed insert shafts 203 is in a limiting fit with an adjacent concentric ring 202. Four circumferentially distributed extrusion shafts 204 are slidably connected to the concentric rings 202. Clamping blocks 205 are fixedly connected to the opposing sides of each of the four circumferentially distributed extrusion shafts 204. The clamping blocks 205 are fastening blocks with a 90° angle, used to ensure tight contact between the clamping blocks 205 and the propellant 8, preventing the propellant 8 from being pulled... When extended, the clamping blocks 205 wobble. The clamping blocks 205 are made of a material with a smooth surface, which is used to reduce the coefficient of friction between the clamping blocks 205 and the propellant 8, thereby reducing the frictional force between the clamping blocks 205 and the propellant 8. Each of the four clamping blocks 205 and the concentric ring 202 is fixedly connected to a compression spring 206. The concentric ring 202 and the compression spring 206 cooperate to make the central axis of the propellant 8 collinear with that of the concentric ring 202, so as to avoid the propellant 8 from shrinking and deforming under tensile force, which would cause the propellant 8 to tilt and cause errors in the test data. At the same time, the propellant 8 is pre-tightened, which reduces the fixation time of the propellant 8 and improves the test efficiency.

[0030] like Figure 5 As shown, the leveling assembly 3 includes a level 301, which is horizontally fixedly connected to two symmetrically distributed concentric rings 202. A sliding seat 106 is slidably connected to a sliding circular plate 302, which is a circular plate. A first threaded shaft 303 is rotatably connected to the sliding seat 106, and the first threaded shaft 303 is threadedly connected to the sliding circular plate 302. The level 301 and the first threaded shaft 303 cooperate to adjust the height of the sliding circular plate 302, so as to prevent the clamping core of the clamping plate 401 from shifting after long-term use, which would cause the propellant 8 to be in an inclined state after clamping, resulting in unreliable tensile test data of the propellant 8.

[0031] like Figure 6 As shown, the clamp assembly 4 includes two symmetrically distributed clamping plates 401. Each clamping plate 401 is composed of a semi-circular slider and a fixed plate. Both symmetrically distributed clamping plates 401 are slidably connected to adjacent sliding circular plates 302. Both symmetrically distributed clamping plates 401 are hinged to two symmetrically distributed hinge rods 402. The sliding circular plates 302 are rotatably connected to two symmetrically distributed sliding rings 403. The four symmetrically distributed hinge rods 402 are hinged to adjacent sliding rings 403. The sliding circular plates 302 are rotatably connected to a second threaded shaft 404. The second threaded shaft 404 is provided with symmetrically distributed threads. The two adjacent sliding rings 403 of the second threaded shaft 404 are threaded together. The second threaded shaft 404 cooperates with the two clamping plates 401 to clamp the propellant 8, thereby strengthening the clamping force of the two clamping plates 401 on the propellant 8 during tensioning and improving the success rate of the test.

[0032] like Figure 6 As shown, the bonding component 5 includes two T-shaped plates 501 symmetrically distributed vertically. The two T-shaped plates 501 are fixedly connected to adjacent clamping plates 401. The T-shaped plates 501 are hinged to bonding plates 502. The T-shaped plates 501 are fixedly connected to two symmetrically distributed annular slide rods 503. The annular slide rods 503 are arc-shaped cylinders. The bonding plate 502 is slidably connected to the two adjacent annular slide rods 503. A first return spring 504 is fixedly connected between the bonding plate 502 and the T-shaped plates 501. The bonding plate 502 and the first return spring 504 cooperate to keep the bonding plate 502 always in contact with the fixed inclined surface of the propellant 8, so as to prevent the bonding plate 502 from separating from the fixed inclined surface of the propellant 8 due to tensile deformation of the propellant 8. This would cause the clamping force and tensile force of the propellant 8 to concentrate at the intersection of the fixed inclined surface of the propellant 8 and the horizontal plane, resulting in excessive stress concentration and fracture. The T-shaped plates 501 are provided with a limiting component 6 for limiting the bonding plate 502.

[0033] like Figure 7As shown, the limiting component 6 includes an annular limiting rod 601 with wedge-shaped blocks evenly distributed on it. The annular limiting rod 601 is slidably connected to a T-shaped plate 501, and a limiting block 602 is slidably connected to the T-shaped plate 501. The limiting block 602 has an inclined surface that fits against the wedge-shaped blocks of the annular limiting rod 601. The limiting block 602 and the annular limiting rod 601 are mutually limiting. A second return spring 603 is fixedly connected between the limiting block 602 and the T-shaped plate 501. A reset frame 604 is fixedly connected to the limiting block 602. A retaining shaft 605 is slidably connected to the reset frame 604. The T-shaped plate 501 is provided with a limiting hole 606. The retaining shaft 605 fits against the limiting hole 606. The annular limiting rod 601 and the limiting block 602 cooperate to limit the bonding plate 502, preventing the bonding plate 502 from being without support when it is bonded to the fixed inclined surface of the propellant 8.

[0034] During the propellant 8 tensile loading test, the operator opens the outer casing 102 and rotates the second threaded shaft 404. The rotation of the second threaded shaft 404 causes two symmetrically distributed sliding rings 403 to slide in opposite directions. These two sliding rings, through the hinge rod 402, cause two symmetrically distributed clamping plates 401 to slide in opposite directions. Once the distance between the two clamping plates 401 is sufficient to insert the propellant 8, the operator rotates the two symmetrically distributed insert shafts 203, releasing the insertion shafts 203 from limiting the concentric ring 202. At this point, the concentric ring 202 and the fixed frame 20... 1. A sliding fit is used. Then, the operator places the propellant 8 into the two concentric rings 202. The four corners of the propellant 8 in the middle are respectively attached to the four circumferentially distributed clamping blocks 205. At the same time, the four clamping blocks 205 are squeezed by the propellant 8, which drives the extrusion shaft 204 to slide along the concentric rings 202. Simultaneously, the extrusion spring 206 is compressed. At this time, the propellant 8 is fixed at the central axis of the concentric rings 202 by the compression force of the extrusion spring 206. The propellant 8 is placed in the two symmetrically distributed concentric rings 202. The two concentric rings 202 fix the propellant 8 before clamping, which reduces the time for the operator to fix the propellant 8 and improves the efficiency of the test.

[0035] After propellant 8 is placed into concentric ring 202, the operator pulls reset frame 604. Reset frame 604 drives limit block 602 and clamping shaft 605 to move synchronously. At the same time, second reset spring 603 is compressed. When limit block 602 releases from the annular limit rod 601, the central axis of clamping shaft 605 coincides with the central axis of limit hole 606. Then, the operator inserts clamping shaft 605 into limit hole 606. Clamping shaft 605 limits limit block 602, preventing the limit block 602 from limiting the annular limit rod 601 when clamping propellant 8, thus avoiding... If the bonding plate 502 cannot be bonded to the inclined surface of the propellant 8 fixing end, the operator will then rotate the second threaded shaft 404 in the opposite direction. This rotation causes two symmetrically distributed sliding rings 403 to slide in opposite directions. These rings, through the hinge rod 402, drive two symmetrically distributed clamping plates 401 to slide in opposite directions. This sliding of the clamping plates 401 causes two T-shaped plates 501 to slide synchronously. Once the two bonding plates 502 contact the inclined surface of the propellant 8 fixing end, the clamping plates 401 continue to slide in opposite directions until the propellant 8 is fixed. The inclined surfaces of the two plates 502 are pressed against each other. When the plate 502 rotates along the T-shaped plate 501 under the pressure of the propellant 8, the propellant 8 is driven by the clamping force of the lower clamping plate 401. The propellant 8 and the lower clamping plate 401 move synchronously. At the same time, the propellant 8 drives the two concentric rings 202 to slide along the fixed frame 201. The plate 502 rotates along the T-shaped plate 501 and slides along the annular slide rod 503. The first return spring 504 is compressed. When the two plates 502 are completely pressed against and clamped to the inclined surfaces on both sides of the propellant 8, the two clamping plates 401 are then clamped together. The clamping center of propellant 8 and the central axis of propellant 8 coincide with the central axes of the two concentric rings 202. Then, the rotation of the second threaded shaft 404 is stopped, and the two insert shafts 203 are rotated to slide along the fixing frame 201 to apply a compressive force to the adjacent concentric rings 202. The two insert shafts 203 limit the adjacent concentric rings 202 respectively through the compressive force. The second threaded shaft 404 cooperates with the clamping plate 401 to clamp and fix the propellant 8, so as to prevent the propellant 8 from sliding and falling off the bonding plate 502 due to the tensile force when the propellant 8 is stretched, which would cause the tensile test of the propellant 8 to fail.

[0036] After the propellant 8 is leveled, the operator pulls the retaining shaft 605 to disengage from the limiting hole 606. This disengagement releases the retaining shaft 605 from the limiting block 602. At this point, the second return spring 603 resets, causing the limiting block 602 to engage with the annular limiting rod 601. The operator then closes the outer casing 102 to form a sealed space and simultaneously applies pressure and temperature loads to the gas inside the casing 102. The operator observes the pressure gauge 701 and temperature gauge 702 on the casing 102. When the pressure gauge 701 and temperature gauge 702 reach the required experimental conditions and stabilize, the application of pressure and temperature loads to the gas inside the casing 102 is stopped. Then, the two symmetrically distributed cylinders 103 are activated simultaneously. The adjacent sliding plates 105 slide synchronously in opposite directions. This increases the volume of the cavity between the sliding plates 105 and the sliding seats 106, resulting in a decrease in internal pressure and creating a negative pressure environment. At this time, the internal pressure of the outer shell 102 is higher than the pressure of the cavity between the sliding plates 105 and the sliding seats 106. Then, the internal pressure of the outer shell 102 pushes the two symmetrically distributed sliding seats 106 to slide synchronously in opposite directions. This synchronous sliding of the two symmetrically distributed sliding seats 106 stretches the propellant 8. The high-pressure gas inside the outer shell 102 uniformly pushes the two symmetrically distributed sliding seats 106. The two symmetrically distributed sliding seats 106 work together to provide uniform and symmetrical thrust to the propellant 8, improving the success rate of the test.

[0037] Two symmetrically distributed sliding seats 106 are pushed by the high-pressure gas inside the outer shell 102 to slide back-to-back along the sliding cylinder 104. The back-to-back sliding of the two sliding seats 106 applies a tensile force to the propellant 8. The propellant 8 is pulled by the tensile force, and its cross-sectional area undergoes equidistant shrinkage deformation. At the same time, the overall length of the propellant 8 increases. The increased overall length of the propellant 8 causes relative sliding with the clamping block 205. Since the clamping block 205 is made of a material with a smooth surface, the friction between the propellant 8 and the clamping block 205 is reduced, preventing excessive friction between the clamping block 205 and the propellant 8. Sparks may be generated when the clamping block 205 and the propellant 8 slide relative to each other, causing an explosion. When the cross-sectional area of ​​the propellant 8 undergoes equidistant shrinkage deformation, the four circumferentially distributed compression springs 206 reset and drive the adjacent clamping blocks 205 to always fit against the four corners of the propellant 8, ensuring that the central axis of the propellant 8 always coincides with the center of the clamping plate 401, avoiding the propellant 8 from shifting due to deformation, which would lead to errors in the tensile test of the propellant 8.

[0038] Simultaneously, the tensile force on the propellant 8 causes deformation of the inclined surface at the point where the propellant 8 and the bonding plate 502 are bonded, resulting in the separation of the bonding plate 502 from the fixed inclined surface of the propellant 8. At this time, the first return spring 504 resets and drives the bonding plate 502 to slide along the annular slide rod 503. At the same time, the bonding plate 502 rotates, and the bonding plate 502 slides along the annular slide rod 503 to bond with the fixed inclined surface of the propellant 8 again. The bonding plate 502 drives the annular limiting rod 601 to slide along the T-shaped plate 501. The annular limiting rod 601 slides along the T-shaped plate 501 and presses against the limiting block 602. The limiting block 602 slides along the T-shaped plate 501, and at the same time, the first return spring 504 resets and drives the bonding plate 502 to slide along the T-shaped plate 501. When the second return spring 603 is compressed, after the bonding plate 502 is bonded to the fixed inclined surface of the propellant 8, the second return spring 603 returns to its original position and limits the annular limiting rod 601. The limiting block 602 and the annular limiting rod 601 slide in one direction. The bonding plate 502 remains bonded to and supports the fixed inclined surface of the propellant 8 as the propellant 8 stretches and deforms. This cycle continues until the end of the experiment to prevent the bonding plate 502 from having no supporting force on the fixed inclined surface of the propellant 8 after bonding with it, which would cause stress concentration at the intersection of the fixed inclined surface of the propellant 8 and the horizontal plane, resulting in the breakage of the propellant 8. Example 2

[0039] Based on Example 1, after the propellant 8 is clamped, the operator checks the level 301. If the level 301 detects a shift in the propellant 8, it indicates that the clamping height of the two clamping plates 401 on both sides of the propellant 8 is different, meaning that the two symmetrically distributed clamping plates 401 are experiencing a misalignment. At this point, the operator rotates the first threaded shaft 303. The rotation of the first threaded shaft 303 causes the sliding circular plate 302 to slide along the sliding seat 106. The sliding circular plate 302 causes the propellant 8 to slide upward synchronously. At this time, the propellant 8 drives the adjacent concentric rings 202. Sliding along the fixed frame 201, when the sliding circular plate 302 slides along the sliding seat 106, when the level 301 detects that the propellant 8 is in a horizontal state, the first threaded shaft 303 stops rotating. At this time, the central axis of the propellant 8 is collinear with the concentric ring 202 and the two side clamping plates 401. Then, the staff limits the concentric ring 202 through the two symmetrically distributed insert shafts 203 to avoid the propellant 8 from shifting due to the aging of the clamping plates 401, which would cause the propellant 8 to be in a tilted state during stretching, resulting in the propellant 8 being stretched at an angle and causing errors in the test.

[0040] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A loading test apparatus for standard bonding specimens of high-energy propellants and liners, characterized in that: The system includes a base (101), a housing (102) on the base (101), symmetrically distributed cylinders (103) fixedly connected to the base (101), symmetrically distributed sliding cylinders (104) fixedly connected to the housing (102), each symmetrically distributed cylinder (103) fixedly connected to a sliding plate (105), the sliding plate (105) slidingly engaging with the adjacent sliding cylinder (104), each symmetrically distributed sliding cylinder (104) slidably connected to a sliding seat (106), and a space between the sliding plate (105) and the sliding seat (106). There is a sealed cavity. The sliding plate (105) and the sliding seat (106) cooperate to increase the volume of the cavity between them and reduce the pressure of the gas in the cavity between the sliding plate (105) and the sliding seat (106). The base (101) is provided with a concentric assembly (2) for fixing the propellant (8). The sliding seat (106) is provided with a leveling assembly (3) for leveling the propellant (8). The leveling assembly (3) is provided with a clamping assembly (4) for clamping the propellant (8). The clamping assembly (4) is provided with a bonding assembly (5) for stabilizing tensile stress. The concentric component (2) includes a fixed frame (201), which is fixedly connected to the base (101). The fixed frame (201) is slidably connected to symmetrically distributed concentric rings (202). The fixed frame (201) is provided with symmetrically distributed insert shafts (203). The symmetrically distributed insert shafts (203) are all limited to the adjacent concentric rings (202). The concentric rings (202) are slidably connected to circumferentially distributed extrusion shafts (204). The circumferentially distributed extrusion shafts (204) are fixedly connected to clamping blocks (205) on opposite sides. An extrusion spring (206) is fixedly connected between the clamping blocks (205) and the concentric rings (202). The leveling assembly (3) includes a level (301), which is fixedly connected to a symmetrically distributed concentric ring (202), a sliding seat (106) is slidably connected to a sliding circular plate (302), and a first threaded shaft (303) is rotatably connected to the sliding seat (106), which is threadedly connected to the sliding circular plate (302). The clamp assembly (4) includes symmetrically distributed clamping plates (401), which are slidably connected to adjacent sliding circular plates (302). Each of the symmetrically distributed clamping plates (401) is hinged with a symmetrically distributed hinge rod (402). The sliding circular plate (302) is rotatably connected to a sliding ring (403). The hinge rod (402) is hinged to the adjacent sliding ring (403). The sliding circular plate (302) is rotatably connected to a second threaded shaft (404), which is threaded to the adjacent sliding ring (403). The bonding component (5) includes symmetrically distributed T-shaped plates (501), which are fixedly connected to adjacent clamping plates (401). The T-shaped plates (501) are hinged to bonding plates (502). The T-shaped plates (501) are fixedly connected to annular slide rods (503). The bonding plates (502) are slidably connected to the adjacent annular slide rods (503). A first return spring (504) is fixedly connected between the bonding plates (502) and the T-shaped plates (501). The T-shaped plates (501) are provided with a limiting component (6) for limiting the bonding plates (502).

2. The loading test apparatus for standard bonding specimens of high-energy propellants and liners as described in claim 1, characterized in that: The volume and pressure of the sealed cavity between the symmetrically distributed sliding plates (105) and the adjacent sliding seats (106) are the same.

3. The loading test device for standard bonding specimens of high-energy propellants and liners as described in claim 1, characterized in that: The clamp (205) is a fastening block with a 90° angle, used to ensure that the clamp (205) and the propellant (8) fit tightly together.

4. The loading test apparatus for standard bonding specimens of high-energy propellants and liners as described in claim 1, characterized in that: The limiting component (6) includes an annular limiting rod (601), which is slidably connected to a T-shaped plate (501). A limiting block (602) is slidably connected to the T-shaped plate (501). The limiting block (602) and the annular limiting rod (601) are in a limiting engagement. A second return spring (603) is fixedly connected between the limiting block (602) and the T-shaped plate (501).

5. The loading test device for standard bonding specimens of high-energy propellants and liners as described in claim 4, characterized in that: The limit block (602) is fixedly connected to the reset frame (604), the reset frame (604) is slidably connected to the retaining shaft (605), the T-shaped plate (501) is provided with a limit hole (606), and the retaining shaft (605) and the limit hole (606) are in a limiting fit.

6. The loading test apparatus for standard bonding specimens of high-energy propellants and liners as described in claim 1, characterized in that: The outer casing (102) is fixedly connected to a pressure gauge (701) for recording test pressure values, and the outer casing (102) is fixedly connected to a temperature gauge (702) for recording test temperature values.

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