Solid rocket engine shell inner pressure and axial pressure combined test system

Abstract

The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technical field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure and axial pressure combined test device, and relates to the technological field of solid rocket engine shell detection. The application discloses a solid rocket engine shell inner pressure

Description

Technical Field

[0001] This invention relates to the field of solid rocket motor casing testing technology, and in particular to a combined testing system for internal pressure and axial pressure of solid rocket motor casing. Background Technology

[0002] With the development of aerospace technology, carbon fiber composite materials, due to their advantages such as high specific strength, high specific modulus, and corrosion resistance, have been widely used in the casing structure of solid rocket motors. During service, the solid rocket motor casing not only withstands the high internal pressure generated by the combustion of the propellant grain but also faces axial loads during flight, especially at the moment of ignition, when the casing is subjected to strong dynamic axial impact. To ensure the structural safety and reliability of strategic weapons such as rockets and missiles during launch and flight, targeted mechanical performance tests must be conducted during the design phase to comprehensively verify the load-bearing capacity of the casing.

[0003] However, existing testing methods mainly rely on single internal pressure loading or uniaxial compression, which makes it difficult to realistically simulate the combined internal pressure and axial compression environment of the shell during service. This results in limitations in our understanding of structural response and potential failure mechanisms. This testing mode is not conducive to revealing multi-field coupled behaviors such as crack propagation and damage evolution, thus affecting structural design optimization and safety assessment.

[0004] In view of the problems existing in the above-mentioned prior art, those skilled in the art urgently need to develop a joint testing system for internal pressure and axial pressure of solid rocket motor casing. Summary of the Invention

[0005] The purpose of this invention is to provide a joint testing system for internal pressure and axial pressure of solid rocket motor casing to solve the problems existing in the prior art. It can realize joint loading of internal pressure and axial pressure, carry out test research under multi-load coupling conditions, thereby obtaining mechanical response data that is closer to the actual service state, and improving the scientificity and reliability of structural design.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a combined testing system for internal pressure and axial pressure of a solid rocket motor casing, comprising a combined testing device, an axial pressure loading system, an internal pressure loading system, and an automatic control system. The combined testing device includes a test chamber, a clamping assembly, and an axial pressurization assembly. The clamping assembly is disposed on the inner base of the test chamber and is used to clamp one axial end of the casing to be tested. The axial pressurization assembly includes an axial drive device, and the axial pressure loading system is connected to the axial drive device. One end of the axial drive device is connected to the inner top wall of the test chamber, and the other end is capable of extending and retracting along the axial direction of the casing to be tested and applying axial pressure to the casing. The casing to be tested is provided with a water inlet pipe, and the internal pressure loading system is connected to the water inlet pipe for applying internal pressure to the casing. The automatic control system is connected to the axial pressure loading system and the internal pressure loading system.

[0008] In some embodiments, the system further includes a pressure relief system, a data acquisition system, a camera device, and a display device; the housing to be tested is provided with a water outlet pipe and an internal pressure detection pipe, and the pressure relief system is connected to the water outlet pipe for relieving pressure inside the housing to be tested; the axial pressure loading system, the internal pressure loading system, the pressure relief system, and the internal pressure detection pipe are all provided with pressure detection devices, and the pressure detection devices are connected to the data acquisition system; the camera device is used to photograph and monitor the housing to be tested, and both the camera device and the data acquisition system are connected to the display device; the automatic control system is connected to the pressure relief system.

[0009] In some embodiments, the axial pressing assembly further includes a loading head; the loading head includes a first connecting plate, a second connecting plate, and a plurality of supporting vertical plates; the first connecting plate and the second connecting plate are parallel and spaced apart, the plurality of supporting vertical plates are located between the first connecting plate and the second connecting plate, and both ends of each supporting vertical plate are connected to the first connecting plate and the second connecting plate respectively; the second connecting plate abuts against one end of the housing to be tested axially, and the axial driving device abuts against the first connecting plate to apply axial pressure to the housing to be tested.

[0010] In some embodiments, the clamping assembly includes multiple fixing blocks and multiple fasteners; the inner base of the test chamber has multiple sets of positioning holes arranged in concentric circles, each set of positioning holes including multiple positioning holes arranged circumferentially; the multiple fixing blocks can be connected and fixed to the multiple positioning holes of any of the positioning hole sets through the fasteners, and the multiple fixing blocks are used to clamp one end of the shell to be tested along the axial direction.

[0011] In some embodiments, the axial pressure loading system includes a hydraulic device and a second pressure gauge; the hydraulic device is connected to the axial drive device via a hydraulic pipeline, and the hydraulic device is used to drive one end of the axial drive device to extend and retract along the axial direction of the housing to be tested and to apply axial pressure to the housing to be tested through the loading head; the hydraulic device is connected to the automatic control system; the second pressure gauge is disposed on the hydraulic pipeline between the hydraulic device and the axial drive device, and the second pressure gauge is connected to the data acquisition system.

[0012] In some embodiments, the internal pressure loading system includes a pressurizing device, a water tank, a first electric valve, a regulating valve, and a first pressure gauge; the input end of the pressurizing device is connected to the water tank via a pipeline, and the output end of the pressurizing device is connected to the water inlet pipe via a pipeline; the first electric valve is disposed on the pipeline between the pressurizing device and the water tank, and the regulating valve and the first pressure gauge are both disposed on the pipeline between the pressurizing device and the water inlet pipe; the pressurizing device is used to pressurize the flowing medium entering the test housing, the regulating valve is used to regulate the pressure of the flowing medium entering the test housing, and both the first electric valve and the regulating valve are connected to the automatic control system; the first pressure gauge is used to detect the pressure at the output end of the pressurizing device, and the first pressure gauge is connected to the data acquisition system.

[0013] In some embodiments, the pressure relief system includes a one-way valve, a filter, a wastewater collection device, a second electric valve, a manual ball valve, and a third pressure gauge; one end of the one-way valve is connected to the outlet pipe via a pipeline, and the other end is connected to the filter via a pipeline; the filter is connected to the wastewater collection device; the third pressure gauge is installed on the pipeline between the one-way valve and the outlet pipe; the second electric valve and the manual ball valve are both installed on the pipeline between the one-way valve and the wastewater collection device; the second electric valve is connected to the automatic control system, and the third pressure gauge is connected to the data acquisition system.

[0014] In some embodiments, a fourth pressure gauge is also included, which is connected to the internal pressure detection tube; the fourth pressure gauge is used to detect the internal pressure of the housing to be tested, and the fourth pressure gauge is connected to the data acquisition system.

[0015] In some embodiments, one end of the inlet pipe, the outlet pipe, and the internal pressure detection pipe are all connected to the interior of the housing to be tested, and the other end of each extends between the first connecting plate and the second connecting plate; the end of the inlet pipe outside the housing to be tested is the inlet, the end of the outlet pipe outside the housing to be tested is the outlet, and the end of the internal pressure detection pipe outside the housing to be tested is the internal pressure detection port.

[0016] In some embodiments, the sidewall of the test chamber has multiple spaced rectangular openings; and / or the axial drive device is a hydraulic jack.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] This invention discloses a combined internal pressure and axial pressure testing system for solid rocket motor casings. The casing to be tested is installed inside a test chamber, with one axial end clamped by a clamping assembly and the other end subjected to axial pressure by an axial pressurizing assembly. An axial pressure loading system is connected to an axial drive device to control the axial drive device in applying axial pressure to the casing. An internal pressure loading system is connected to the water inlet pipe of the casing to apply internal pressure. An automatic control system can control the axial pressure loading system and the internal pressure loading system to load or stop loading. Therefore, this invention enables combined internal pressure and axial pressure loading tests on the casing, comprehensively simulating the multiple load conditions experienced by solid rocket motor casings during actual service, thereby obtaining more representative mechanical response data and improving the engineering applicability of the test results. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the solid rocket motor casing internal pressure and axial pressure joint testing system in some embodiments of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the combined testing device in some embodiments of the present invention;

[0022] Figure 3 This is a schematic diagram of the combined testing device without the testing chamber in some embodiments of the present invention;

[0023] Figure 4 This is a schematic diagram of a structure in which a water inlet pipe, a water outlet pipe, and an internal pressure detection pipe are provided on the shell to be tested in some embodiments of the present invention.

[0024] Figure 5 This is a schematic diagram showing the connection between the inner base of the test chamber and the fixing block in some embodiments of the present invention;

[0025] Figure 6This is a schematic diagram of the structure of the fixing block in some embodiments of the present invention.

[0026] In the diagram: 1-Combined testing apparatus; 2-Internal pressure loading system; 3-Automatic control system; 4-Axial pressure loading system; 5-Pressure relief system; 6-Fourth pressure gauge; 7-Camera device; 8-Display device; 9-Data acquisition system;

[0027] 11-Test chamber; 12-Axial drive device; 13-Loading head; 14-Test housing; 15-Clamping assembly; 16-Inlet pipe; 17-Outlet pipe; 18-Internal pressure detection pipe;

[0028] 21-Water tank; 22-First electric valve; 23-Pressure device; 24-First pressure gauge; 25-Regulating valve;

[0029] 41-Hydraulic device; 42-Second pressure gauge;

[0030] 51-Third pressure gauge; 52-Check valve; 53-Manual ball valve; 54-Second electric valve; 55-Filter; 56-Wastewater collection device;

[0031] 91 - First sensor channel; 92 - Second sensor channel; 93 - Third sensor channel; 94 - Fourth sensor channel;

[0032] 111-Inner base; 112-Positioning hole; 131-First connecting plate; 132-Second connecting plate; 133-Supporting vertical plate; 151-Fixing block; 152-Fastener. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The purpose of this invention is to provide a joint testing system for internal pressure and axial pressure of solid rocket motor casing to solve the problems existing in the prior art. It can realize the joint loading of internal pressure and axial pressure, carry out test research under multi-load coupling conditions, thereby obtaining mechanical response data that is closer to the actual service state, and improving the scientificity and reliability of structural design.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] This invention provides a combined testing system for internal pressure and axial pressure of a solid rocket motor casing, such as... Figures 1 to 6 As shown, it includes a combined testing device 1, an axial compression loading system 4, an internal pressure loading system 2, and an automatic control system 3; wherein, the combined testing device 1 includes a test chamber 11, a clamping assembly 15, and an axial pressure assembly; the clamping assembly 15 is disposed on the inner base 111 of the test chamber 11 and is used to clamp one end of the shell 14 to be tested along the axial direction; the axial pressure assembly is used to apply axial pressure to the shell 14 to be tested.

[0037] The axial pressure assembly includes an axial drive device 12, one end of which is connected to the inner top wall of the test chamber 11, and the other end of which is capable of extending and retracting along the axial direction of the housing 14 to be tested. An axial pressure loading system 4 is connected to the axial drive device 12 and is used to provide axial loading pressure, which is transmitted through the axial drive device 12. In a specific embodiment, the axial pressure loading system 4 can generate hydraulic oil with a certain pressure, which causes the telescopic rod of the axial drive device 12 to extend outward to apply axial pressure to the housing 14 to be tested.

[0038] And, as Figure 4 As shown, a water inlet pipe 16 is provided on the test housing 14. One end of the water inlet pipe 16 is connected to the interior of the test housing 14, and the other end is connected to the internal pressure loading system 2. The internal pressure loading system 2 is used to pressurize the flowing medium, such as water, and thus pressurize the interior of the test housing 14 to form an internal loading pressure.

[0039] The automatic control system 3 is connected to the axial pressure loading system 4 to control the axial pressure loading system 4 to apply axial pressure to the housing 14 under test or to stop applying axial pressure; the automatic control system 3 is connected to the internal pressure loading system 2 to control the internal pressure loading system 2 to apply internal pressure to the housing 14 under test or to stop applying internal pressure.

[0040] It should be noted that the axial pressure loading system 4 of the present invention is connected to the axial drive device 12 through a pipeline, and the internal pressure loading system 2 is connected to the water inlet pipe 16 through a pipeline; the automatic control system 3 can be electrically connected to the axial pressure loading system 4 and the internal pressure loading system 2, and the present invention does not make specific limitations in this regard.

[0041] In some implementations, see further reference. Figure 1 As shown, the combined testing system of the present invention also includes a pressure relief system 5, a data acquisition system 9, a camera device 7, and a display device 8. A water outlet pipe 17 and an internal pressure detection pipe 18 are provided on the test housing 14. The pressure relief system 5 is connected to the water outlet pipe 17 for depressurizing the interior of the test housing 14.

[0042] Furthermore, pressure detection devices are installed on the axial pressure loading system 4, the internal pressure loading system 2, the pressure relief system 5, and the internal pressure detection tube 18. The pressure detection devices are connected to the data acquisition system 9, so that the data acquisition system 9 can collect and monitor in real time the axial pressure applied by the axial pressure loading system 4, the internal pressure applied by the internal pressure loading system 2, the pressure of the pressure relief system 5, and the pressure at the internal pressure detection tube 18. The pressure at the internal pressure detection tube 18 is the pressure inside the shell 14 to be tested.

[0043] The camera device 7 is a high-speed camera used to capture and monitor the deformation and crack propagation of the housing 14 under test. Both the camera device 7 and the pressure relief system 5 are connected to the display device 8, which can be a computer or other display device.

[0044] The automatic control system 3 is connected to the pressure relief system 5 to control the pressure relief system 5 to relieve pressure on the housing 14 to be tested; the automatic control system 3 of the present invention can be electrically connected or communicatively connected to the pressure relief system 5, and those skilled in the art can make the specific choice.

[0045] In some implementations, such as Figure 3 As shown, the axial pressing assembly also includes a loading head 13, which includes a first connecting plate 131, a second connecting plate 132, and a plurality of supporting vertical plates 133 located between the first connecting plate 131 and the second connecting plate 132. The first connecting plate 131 and the second connecting plate 132 are parallel to each other and spaced apart. The two ends of the supporting vertical plates 133 are respectively connected to the first connecting plate 131 and the second connecting plate 132. During the test, the second connecting plate 132 abuts against one end of the shell 14 to be tested axially, and one end of the axial driving device 12 abuts against the first connecting plate 131, so that the axial driving device 12 can apply axial loading force to the shell 14 to be tested through the loading head 13.

[0046] In some implementations, such as Figure 5 and Figure 6 As shown, the clamping assembly 15 includes multiple fixing blocks 151 and multiple fasteners 152. Multiple sets of positioning holes arranged concentrically are formed on the inner base 111 of the test chamber 11, each set including multiple positioning holes 112 arranged circumferentially. The multiple fixing blocks 151 can be connected and fixed to the multiple positioning holes 112 of any set of clamping assemblies 15 using fasteners 152, and the multiple fixing blocks 151 are used to clamp one axial end of the housing 14 to be tested. Figure 5 As shown, multiple fixing blocks 151 are arranged in a circle and used to clamp the bottom end of the housing 14 to be tested.

[0047] By setting multiple sets of positioning holes and connecting and fixing multiple fixing blocks 151 to different sets of positioning holes, the present invention can adapt to clamp and fix test housings 14 of different diameters and ensure that the test housings 14 will not shift during axial compression loading.

[0048] In some implementations, such as Figure 1 As shown, the axial pressure loading system 4 includes a hydraulic device 41 and a second pressure gauge 42.

[0049] The hydraulic device 41 is connected to the axial drive device 12 through a hydraulic pipeline. The hydraulic device 41 can generate loading pressure and apply it to the test housing 14 through the axial drive device 12 and the loading head 13. That is, the hydraulic device 41 is used to drive the axial drive device 12 to extend and retract along the axial direction of the test housing 14 and apply axial pressure to the test housing 14 through the loading head 13. The hydraulic device 41 is connected to the automatic control system 3.

[0050] The second pressure gauge 42 is installed on the hydraulic pipeline between the hydraulic device 41 and the axial drive device 12. The second pressure gauge 42 is used to detect the pressure of the hydraulic pipeline, that is, the loading pressure generated by the hydraulic device 41. The second pressure gauge 42 is connected to the data acquisition system 9 through the fourth sensor channel 94 to collect axial pressure data in real time.

[0051] In some embodiments, the internal pressure loading system 2 includes a pressurizing device 23, a water tank 21, a first electric valve 22, a regulating valve 25, and a first pressure gauge 24.

[0052] The input end of the pressurizing device 23 is connected to the water tank 21 through a pipeline, and the output end of the pressurizing device 23 is connected to the water inlet pipe 16 through a pipeline; the first electric valve 22 is installed on the pipeline between the pressurizing device 23 and the water tank 21, and the regulating valve 25 and the first pressure gauge are both installed on the pipeline between the pressurizing device 23 and the water inlet pipe 16; the pressurizing device 23 is used to pressurize the flowing medium entering the test housing 14, and the regulating valve 25 is used to regulate the pressure of the flowing medium entering the test housing 14. The first electric valve 22 and the regulating valve 25 are both connected to the automatic control system 3.

[0053] The first pressure gauge 24 is used to detect the pressure at the output end of the pressurizing device 23, and the first pressure gauge 24 is connected to the data acquisition system 9 through the third sensor channel 93 to collect internal pressure supply pressure data in real time.

[0054] The water tank 21 of the present invention is used to provide a pressure source for the internal pressure test of the housing 14 to be tested; the first electric valve 22 is used to control the water flow rate; the pressurizing device 23 is used to increase the pressure; and the first pressure gauge 24 is used to test the pressure of the internal pressure supply system.

[0055] In some embodiments, the pressure relief system 5 includes a one-way valve 52, a filter 55, a wastewater collection device 56, a second electric valve 54, a manual ball valve 53, and a third pressure gauge 51.

[0056] One end of the check valve 52 is connected to the outlet pipe 17 via a pipeline, and the other end is connected to the filter 55 via a pipeline. The filter 55 is connected to the wastewater collection device 56. The third pressure gauge 51 is installed on the pipeline between the check valve 52 and the outlet pipe 17. The second electric valve 54 and the manual ball valve 53 are both installed on the pipeline between the check valve 52 and the wastewater collection device 56. The second electric valve 54 is connected to the automatic control system 3, and the third pressure gauge 51 is connected to the data acquisition system 9 through the first sensor channel 91 to collect pressure relief data in real time.

[0057] The third pressure gauge 51 of this invention is used to test the pressure of the safety relief system; the one-way valve 52 controls the one-way flow of water; the manual ball valve 53 is used to manually control the opening and closing of the valve, which is convenient for system maintenance; the second electric valve is used to control the opening and closing of the system; the filter 55 is used to remove impurities from the wastewater; and the wastewater collection device 56 is used to collect wastewater.

[0058] In some embodiments, a fourth pressure gauge 6 is also included, which is connected to the internal pressure detection tube 18. The fourth pressure gauge 6 is used to detect the internal pressure of the housing 14 to be tested, and the fourth pressure gauge 6 is connected to the data acquisition system 9 through the second sensor channel 92 to collect internal pressure data in real time.

[0059] In some embodiments, one end of the inlet pipe 16, the outlet pipe 17, and the internal pressure detection pipe 18 are all connected to the interior of the housing 14 to be tested, and the other end of each extends between the first connecting plate 131 and the second connecting plate 132; the end of the inlet pipe 16 outside the housing 14 to be tested is the inlet, the end of the outlet pipe 17 outside the housing 14 to be tested is the outlet, and the end of the internal pressure detection pipe 18 outside the housing 14 to be tested is the internal pressure detection port.

[0060] In some embodiments, the sidewall of the test chamber 11 has a plurality of spaced rectangular openings.

[0061] In some embodiments, the axial drive device 12 is a hydraulic jack. It should be noted that the axial drive device 12 of the present invention can also be other drive devices capable of extension and retraction and applying axial pressure to the housing 14 to be tested; the present invention does not impose specific limitations on these devices.

[0062] The testing procedure for the solid rocket motor casing internal pressure and axial pressure combined testing system of the present invention during use is as follows:

[0063] 1. Preparation before testing

[0064] Adjust the clamping assembly 15 according to the size of the housing 14 to be tested.

[0065] Check that all components of the internal pressure loading system 2 are securely connected. The water tank 21 should be filled with water to ensure that the first electric valve 22, pressurizing device 23, first pressure gauge 24, and regulating valve 25 are all functioning properly.

[0066] Check the axial pressure loading system 4 to ensure that the hydraulic oil in the hydraulic device 41 is sufficient and that the second pressure gauge 42 is displaying normally.

[0067] Inspect the pressure relief system 5 to confirm that the third pressure gauge 51, check valve 52, manual ball valve 53, second electric valve 54, filter 55, and wastewater collection device 56 are correctly connected and functioning properly. The manual ball valve 53 should be in the closed position before testing.

[0068] Ensure that the camera device 7 and the display device 8 are properly connected, and that the four channels of the data acquisition system 9—the first sensor channel 91 (safety pressure relief sensor channel), the second sensor channel 92 (housing internal pressure sensor channel), the third sensor channel 93 (internal pressure supply system pressure sensor channel), and the fourth sensor channel 94 (axial pressure sensor channel)—can all acquire data normally.

[0069] 2. Testing Process

[0070] Internal pressure loading: The first electric valve 22 in the internal pressure loading system 2 is opened, and water in the water tank 21 flows into the pipeline under the control of the first electric valve 22. The pressure is increased by the pressurizing device 23, allowing the water to enter the inlet of the housing 14 to be tested. During this process, the first pressure gauge 24 is observed, and the water flow pressure is adjusted by the regulating valve 25 to reach the predetermined internal pressure loading value. At the same time, the internal pressure sensor channel of the housing collects the pressure data inside the housing in real time.

[0071] Axial pressure loading: The hydraulic device 41 of the axial pressure loading system 4 is activated. The hydraulic device 41 generates an axial pressure load, which is transmitted to the loading head 13 through a hydraulic jack. The loading head 13 acts on the housing 14 to be tested, thereby achieving axial pressure loading on the housing 14. During the loading process, the second pressure gauge 42 is observed to ensure that the axial pressure load reaches the predetermined value. The axial pressure sensor channel collects axial pressure data in real time.

[0072] Synchronous loading of axial pressure and internal pressure: The first electric valve 22 of the internal pressure loading system 2 and the hydraulic device 41 of the axial pressure loading system 4 are opened synchronously by the automatic control system 3 to achieve synchronous loading of axial pressure and internal pressure.

[0073] Real-time monitoring: Throughout the loading process, a high-speed camera continuously captures images of the test housing 14, monitoring its deformation and crack propagation in real time, and transmitting the image data to a computer. The safety relief pressure sensor channel and the internal pressure supply system pressure sensor channel monitor the pressure of the relief system 5 and the internal pressure loading system 2 in real time, respectively. The housing internal pressure sensor channel monitors the internal pressure of the housing in real time during loading. The axial pressure sensor channel monitors changes in the axial load on the housing.

[0074] Abnormal Handling: If the fourth pressure gauge 6 of the housing detects an abnormal increase or decrease in the internal pressure of the housing, it may be due to abnormal operating conditions such as excessive structural design margin, leakage, or failure of the housing. At this time, the second electric valve 54 in the pressure relief system 5 will automatically open, and the wastewater inside the housing will flow into the wastewater collection device 56 after being filtered by the filter 55. The third pressure gauge 51 can display the pipeline pressure in the pressure relief system 5. In order to prevent the internal components of the safety pressure relief system from being damaged due to excessive internal pressure, thereby causing potential safety risks.

[0075] 3. Test ends

[0076] First, close the first electric valve 22 and the pressurizing device 23 in the internal pressure loading system 2 to stop supplying water and pressurizing the internal pressure loading system 2. Then, slowly release the pressure inside the shell and drain the water by opening the outlet.

[0077] Shutting down the hydraulic device 41 of the axial load system 4 causes the hydraulic jack to unload, and the axial load gradually decreases.

[0078] After the test, check all system components for damage or abnormalities. Clean the wastewater collection device 56 in the test chamber 11 and the pressure relief system 5, and perform maintenance on the equipment to prepare for the next test.

[0079] The solid rocket motor casing internal pressure and axial pressure joint testing system of the present invention can realize the joint loading test of internal pressure and axial pressure, which can comprehensively simulate the multiple load conditions that the solid rocket motor casing is subjected to during actual service, thereby obtaining more representative mechanical response data and improving the engineering applicability of the test results;

[0080] Furthermore, it is equipped with an adjustable adaptive clamping fixture, which can flexibly adapt to housings of different specifications and sizes, significantly enhancing the versatility and expandability of the test platform and meeting the testing needs of multiple engine housing models.

[0081] Furthermore, this invention incorporates an intelligent safety pressure relief system that can automatically identify and handle abnormal conditions such as shell leakage and failure during internal pressure loading, effectively ensuring the safety of the testing process and the reliability of the test data.

[0082] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A combined testing system for internal pressure and axial pressure of a solid rocket motor casing, characterized in that, It includes a combined testing device, an axial compression loading system, an internal compression loading system, and an automatic control system; The combined testing device includes a test chamber, a clamping assembly, and an axial pressure assembly; the clamping assembly is disposed on the inner base of the test chamber and is used to clamp one end of the shell to be tested along the axial direction. The axial pressure assembly includes an axial drive device, and the axial pressure loading system is connected to the axial drive device. One end of the axial drive device is connected to the inner top wall of the test chamber, and the other end can extend and retract along the axial direction of the shell to be tested and apply axial pressure to the shell to be tested. The housing to be tested is provided with a water inlet pipe, and the internal pressure loading system is connected to the water inlet pipe to apply internal pressure to the housing to be tested. The automatic control system is connected to the axial pressure loading system and the internal pressure loading system; It also includes a pressure relief system, a data acquisition system, a camera device, and a display device; The test housing is equipped with a water outlet pipe and an internal pressure detection pipe, and the pressure relief system is connected to the water outlet pipe for relieving pressure inside the test housing; The axial pressure loading system, the internal pressure loading system, the pressure relief system, and the internal pressure detection tube are all equipped with pressure detection devices, and the pressure detection devices are connected to the data acquisition system. The camera device is used to photograph and monitor the housing under test, and both the camera device and the data acquisition system are connected to the display device; The automatic control system is connected to the pressure relief system; The axial pressure assembly also includes a loading head; The loading head includes a first connecting plate, a second connecting plate, and a plurality of supporting vertical plates; the first connecting plate and the second connecting plate are parallel and spaced apart, the plurality of supporting vertical plates are located between the first connecting plate and the second connecting plate, and the two ends of each supporting vertical plate are respectively connected to the first connecting plate and the second connecting plate; The second connecting plate abuts against one end of the housing to be tested along the axial direction, and the axial driving device abuts against the first connecting plate to apply axial pressure to the housing to be tested; The pressure relief system includes a second electric valve, which is connected to the automatic control system. One end of the inlet pipe, the outlet pipe, and the internal pressure detection pipe are all connected to the interior of the housing to be tested, and the other end of each extends between the first connecting plate and the second connecting plate. The clamping assembly includes multiple fixing blocks and multiple fasteners; The inner base of the test chamber has multiple sets of positioning holes arranged in concentric circles, and each set of positioning holes includes multiple positioning holes arranged along the circumference. The plurality of fixing blocks can be connected and fixed to the plurality of positioning holes of any of the positioning hole groups through the fasteners, and the plurality of fixing blocks are used to clamp one end of the housing to be tested along the axial direction; The pressure relief system also includes a one-way valve, a filter, a wastewater collection device, a manual ball valve, and a third pressure gauge; one end of the one-way valve is connected to the outlet pipe via a pipeline, and the other end is connected to the filter via a pipeline; the filter is connected to the wastewater collection device; the third pressure gauge is installed on the pipeline between the one-way valve and the outlet pipe; the second electric valve and the manual ball valve are both installed on the pipeline between the one-way valve and the wastewater collection device; the third pressure gauge is connected to the data acquisition system. It also includes a fourth pressure gauge, which is connected to the internal pressure detection tube; the fourth pressure gauge is used to detect the internal pressure of the housing to be tested, and the fourth pressure gauge is connected to the data acquisition system; If the fourth pressure gauge detects an abnormal increase or decrease in the internal pressure of the housing under test, it controls the second electric valve to open automatically.

2. The solid rocket motor casing internal pressure and axial pressure joint testing system according to claim 1, characterized in that, The axial pressure loading system includes a hydraulic device and a second pressure gauge; The hydraulic device is connected to the axial drive device through a hydraulic pipeline. The hydraulic device is used to drive one end of the axial drive device to extend and retract along the axial direction of the housing to be tested and to apply axial pressure to the housing to be tested through the loading head. The hydraulic device is connected to the automatic control system. The second pressure gauge is installed on the hydraulic pipeline between the hydraulic device and the axial drive device, and the second pressure gauge is connected to the data acquisition system.

3. The solid rocket motor casing internal pressure and axial pressure joint testing system according to claim 1, characterized in that, The internal pressure loading system includes a pressurizing device, a water tank, a first electric valve, a regulating valve, and a first pressure gauge. The input end of the pressurizing device is connected to the water tank through a pipeline, and the output end of the pressurizing device is connected to the water inlet pipe through a pipeline; the first electric valve is installed on the pipeline between the pressurizing device and the water tank, and the regulating valve and the first pressure gauge are both installed on the pipeline between the pressurizing device and the water inlet pipe; The pressurizing device is used to pressurize the flowing medium entering the test housing, and the regulating valve is used to regulate the pressure of the flowing medium entering the test housing. Both the first electric valve and the regulating valve are connected to the automatic control system. The first pressure gauge is used to detect the pressure at the output end of the pressurization device, and the first pressure gauge is connected to the data acquisition system.

4. The solid rocket motor casing internal pressure and axial pressure joint testing system according to claim 1, characterized in that, The water inlet pipe is located at one end outside the housing to be tested, the water outlet pipe is located at one end outside the housing to be tested, and the internal pressure detection pipe is located at one end outside the housing to be tested.

5. The solid rocket motor casing internal pressure and axial pressure joint testing system according to claim 1, characterized in that, The side wall of the test chamber has multiple spaced rectangular openings; and / or The axial drive device is a hydraulic jack.

Images