Combustion box, combustion test integrated platform and method for aviation

Abstract

The present application relates to aviation material combustion performance testing device technical field, disclose a kind of aviation combustion chamber, aviation combustion chamber includes box, support, flame calibration fixture, multi-angle test fixture and flame spraying device;The flame calibration fixture includes hanging assembly;The multi-angle test fixture includes one or more fixtures with several hanging assemblies, for selecting corresponding fixture according to test type to be placed in combustion chamber Corresponding test piece is clamped;The flame spraying device includes combustion torch, torch holder, torch stroke control device and automatic ignition device;The torch stroke control device includes push assembly, timing assembly and automatic ejection assembly;The scheme is improved to multi-angle test fixture and flame calibration fixture structure, direct suspension is realized, and the switching efficiency of fixture is improved;Through torch stroke control device and automatic ignition device, test time can be accurately controlled, flame speed and automatic ignition efficiency are separated, and test accuracy is further improved.

Description

Technical Field

[0001] This invention relates to the technical field of combustion performance testing devices for aerospace materials, specifically to an integrated combustion chamber, combustion testing platform, and method for aerospace applications. Background Technology

[0002] Aerospace materials require different levels of protection depending on the application scenario. Therefore, after the materials are produced, different combustion tests need to be conducted according to the material type. Testing the fire resistance and flame retardancy of materials is very important for selecting suitable aerospace materials.

[0003] The commonly used equipment in combustion tests is the combustion chamber. When conducting combustion tests in an existing combustion chamber, the flame height and temperature are first tested. After determining the initial airflow pressure, the flame is ignited, and a handheld flame height indicator is used to observe the flame height. A handheld thermocouple is placed at the geometric center of the flame to test the flame temperature. After calibrating the flame height and temperature according to regulations, the flame is extinguished and the test is awaited. The appropriate fixtures are installed according to the test specimen and test type requirements. The flame is ignited, pushed to the test position, and a stopwatch is started to begin timing the test. If the flame goes out during the test, the combustion chamber door is immediately opened, the flame is ignited with a lighter, and the test continues. After the corresponding test time is reached, the flame is immediately removed, the flame is turned off, and the test is awaited for the next test type. The fixtures are removed, replaced with fixtures corresponding to another test type, and the above steps are repeated to conduct the combustion test.

[0004] The existing experimental process has the following problems: 1) Using a handheld flame height indicator and a handheld thermocouple to observe the flame height and temperature respectively results in inaccurate measurements due to vibration; furthermore, when switching from height testing to temperature testing, the combustion chamber door needs to be opened, and the ambient airflow affects the stability of the flame, leading to inaccurate flame temperature measurements and making it impossible to guarantee the accuracy of flame temperature and height testing; 2) The fixture structure is not reasonably designed, resulting in long fixture switching times and cumbersome switching operations during multi-angle combustion tests, with the longest switching time being approximately 80 minutes; 3) The combustion test is controlled by a stopwatch, but due to factors such as reaction time or distraction, the test time cannot be accurately guaranteed; 4) If the flame is extinguished during the test, the re-ignition time is long and cannot be accurately controlled, making it impossible to accurately determine the time to continue the test; the combination of these problems throughout the entire experimental process will seriously affect the accuracy of the test results. Summary of the Invention

[0005] The present invention aims to provide an integrated combustion chamber, combustion test platform and method for aviation, in order to solve the technical problems of cumbersome operation and low accuracy of test results in existing combustion devices.

[0006] The basic solution provided by this invention is: an aviation combustion box, including a box body, a support, a flame calibration fixture, a multi-angle test fixture, and a flame-spraying device;

[0007] The bracket is fixedly installed inside the box and includes several crossbeams with a fixed spacing.

[0008] The flame calibration fixture includes a hanging assembly and several clamping components fixedly connected to the hanging assembly; the clamping components are used to clamp the flame testing device; it also includes several fine-tuning mechanisms that cooperate with the clamping components to adjust the position of the flame testing device.

[0009] The multi-angle test fixture includes one or more fixtures with several suspension components, used to select the appropriate fixture according to the test type, place it in the combustion chamber, and clamp the corresponding test piece for combustion test; the several suspension components have a fixed spacing, which is adapted to the spacing of the corresponding crossbeam combination, and is used to directly suspend the fixture on the bracket.

[0010] The flame-spraying device includes a combustion torch, a torch holder, a torch stroke control device, and an automatic ignition device. The torch holder is fixedly installed inside the housing and includes a three-section multi-angle positioning platform. The combustion torch and the torch stroke control device are installed on the three-section multi-angle positioning platform and are used to adjust the angle and displacement stroke of the combustion torch. The automatic ignition device is installed on the combustion torch. The torch stroke control device includes a pushing component, a timing component, and an automatic ejection component. It is used to move the combustion torch on the three-section multi-angle positioning platform by pushing the torch, and after contacting the timing component and the automatic ejection component, the timing component starts timing the corresponding test time. After the time is up, the automatic ejection component pushes the combustion torch away from the test piece.

[0011] The working principle and advantages of this invention are as follows: The multi-angle test fixture undergoes structural improvement. By matching the beam spacing and suspension component spacing, the multi-angle test fixture can be directly suspended on the support beam, facilitating convenient switching, significantly shortening fixture switching time, improving switching efficiency, and reducing operational difficulty. Simultaneously, the fixture size is set according to the required test distance, ensuring the distance to the combustion torch during testing is met without manual adjustment, further enhancing test accuracy. By performing the combustion test with fixture switching within the combustion chamber, the bulky chamber structure caused by arranging all fixtures inside is avoided, and damage to unnecessary fixtures is prevented. This solution effectively reduces the combustion chamber volume, achieving miniaturization and providing excellent protection for the fixtures. Suspending the fixtures on different support beam combinations meets the stable support requirements of various angle fixtures, resulting in a highly integrated and well-matched suspension structure.

[0012] For the beam spacing, a suitable flame calibration fixture is designed, allowing for one-time suspension, convenient operation, and high stability after suspension. A fine-tuning mechanism further enhances testing accuracy. The torch device structure, based on a three-section multi-angle positioning platform, can precisely position the torch angle required for various tests. Combined with the torch stroke control device and automatic ignition device, it can accurately control the test time, flame velocity, and automatic ignition efficiency, further improving test accuracy. This solution features external fixtures, which are placed inside the combustion chamber depending on the test type. This allows for a compact and integrated combustion chamber with a small footprint, making it suitable for widespread use.

[0013] Furthermore, the flame testing device includes a height indicator and a thermocouple.

[0014] Beneficial effects: Enables precise testing of flame height and temperature.

[0015] Furthermore, the corresponding clamping assembly of the thermocouple is provided with a limit bar.

[0016] Beneficial effect: It can ensure the lateral relative position of the flame and the thermocouple, improving the accuracy of the test.

[0017] Furthermore, the clamp with several suspension components includes a vertical clamp, a horizontal clamp, and a first angle clamp; it also includes a second angle clamp with a base for directly approaching the flame-spraying device to conduct corresponding combustion tests.

[0018] Beneficial effects: By setting the fixture to both suspended and base-mounted types, it is possible to meet the needs of different test types and facilitate switching.

[0019] Furthermore, the three-section multi-angle positioning platform includes a support plate and multi-angle positioning plates symmetrically installed on both sides of the support plate with identical structures; the positioning plates have through slots, which are sequentially configured as a horizontal section, a second angle section, and a first angle section, and cooperate with the torch stroke control device to fix the combustion torch at multiple angles and move its corresponding position, wherein the first angle is greater than the second angle.

[0020] Beneficial effects: It can accurately position the combustion torch according to the type of combustion test, improve the speed of test condition preparation when switching test types, and is easy to operate.

[0021] This invention is based on an aviation combustion chamber and also provides an integrated platform for aviation combustion testing, which solves the technical problems of cumbersome operation and low accuracy of test results in existing combustion devices.

[0022] An integrated combustion test platform for aviation includes the aforementioned aviation combustion chamber; it also includes a smoke exhaust assembly installed inside the chamber and a control device installed on the outer side of the chamber; the smoke exhaust assembly is used to maintain a combustion environment inside the combustion chamber that is compatible with the type of combustion test; the control device includes a command module, a data acquisition module, an analysis and judgment module, and a recording and display module for analyzing the combustion test; the control device is electrically connected to the smoke exhaust assembly, the torch stroke control device, and the automatic ignition device.

[0023] Beneficial effects: Based on the combustion chamber, an integrated platform can be built quickly and easily, with good overall integration, centralized control of each component, and easy automatic data collection, analysis and control.

[0024] This invention is based on an integrated combustion chamber and combustion test platform for aviation, and also provides a combustion test method for aviation to solve the technical problems of cumbersome operation and low accuracy of test results in existing combustion devices.

[0025] Includes the following steps:

[0026] Step 1: Flame Calibration

[0027] S11, Adjust the burner to the horizontal section of the three-section multi-angle positioning platform so that the burner is in a vertical position; Move the burner to the calibration position through the burner stroke control device;

[0028] S12, suspend the flame calibration fixture at the corresponding position on the bracket, and clamp the height indicator and thermocouple at the corresponding positions of the height indicator clamping assembly and the thermocouple clamping assembly respectively.

[0029] S13, the position of the height indicator is adjusted by the first fine-tuning mechanism to ensure that the relative position of the flame height indicator and the combustion torch nozzle meets the requirements of the combustion test, and the position of the thermocouple is adjusted by the second fine-tuning mechanism to ensure that the temperature measuring point is at the geometric center of the flame;

[0030] S14, The burner torch is moved to the calibration position for flame calibration by the torch stroke control device;

[0031] Step 2: Fixture Installation

[0032] S21. Select the appropriate multi-angle test fixture according to the type of combustion test;

[0033] S22, When a vertical clamp, a horizontal clamp, or a first angle clamp is selected, the clamp is directly suspended on the corresponding crossbeam assembly of the support using several suspension components of the clamp to hold the corresponding test piece.

[0034] When the second angle fixture is selected, the base is used to push the entire fixture to the corresponding position to clamp the corresponding test piece;

[0035] Step 3: Combustion Test

[0036] S31, Select the test time according to the type of combustion test;

[0037] S32, after ignition and waiting for the flame to stabilize, the combustion torch is moved to the test position via the torch stroke control device.

[0038] Trigger the timing component to start timing;

[0039] S33, Test time is up. Use the torch stroke control device to move the combustion torch to the end position and away from the test piece.

[0040] Step 4: Fixture Replacement

[0041] S41, Remove or push away the fixture at the end of the test;

[0042] S42, directly suspend or advance the fixture required for the next test type.

[0043] Beneficial effects: Based on the integrated combustion chamber and combustion test platform, this method allows for simple and convenient fixture switching, ensuring the speed of combustion testing; the torch stroke control and automatic ignition mode can accurately control the combustion test time and the distance of the burning object, ensuring the accuracy of the combustion test. Attached Figure Description

[0044] Figure 1 This is a front view of an aviation combustion chamber provided in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the flame calibration fixture provided in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the horizontal clamp suspended on the bracket according to an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of the 60-degree clamp suspended on the bracket according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the 45-degree clamp provided in an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of the flamethrower provided in an embodiment of the present invention;

[0050] Figure 7 This is a front view of an integrated combustion testing platform for aviation provided in an embodiment of the present invention;

[0051] Figure 8This is a flowchart of an aviation combustion test method provided in an embodiment of the present invention. Detailed Implementation

[0052] The following detailed explanation illustrates the specific implementation methods:

[0053] The markings in the accompanying drawings of the instruction manual include: box 1, bracket 2, crossbeam one 21, crossbeam two 22, crossbeam three 23, flame calibration fixture 3, left hanging plate 31, right hanging plate 32, base plate 33, height indicator clamping assembly 34, thermocouple clamping assembly 35, height indicator 36, limit bar 37, first fine adjustment mechanism 38, second fine adjustment mechanism 39, irregular hole 310, multi-angle test fixture 4, test piece 41, vertical fixture 42, horizontal fixture 43, 60-degree fixture 44, 45-degree fixture 45, base 451, rotating and moving mechanism 452, suspension assembly 46, sample placement frame 453, flame-spraying device 5, combustion torch 51, support rod 52, positioning plate 53, through groove 54, pushing assembly 55, timing assembly 56, automatic pop-out assembly 57.

[0054] The basic implementation examples are as follows: Figure 1 and Figure 2 As shown: An aviation combustion box includes a box body 1, a support 2, a flame calibration fixture 3, a multi-angle test fixture 4, and a flame-spraying device 5.

[0055] In this embodiment, the box 1 is a cubic structure, including a bottom plate, a top plate, opposing first and second side plates, and opposing third and fourth side plates; all six plates are made of heat insulation board, which is made of fireproof brick, fireproof cement, gypsum insulation board and 304 steel plate, and the thickness of the heat insulation board is at least 50mm.

[0056] The bracket 2 is fixedly installed inside the box and includes several crossbeams with a fixed spacing. In this embodiment, it is located between the first side plate and the second side plate and includes crossbeam 1 21, crossbeam 22 and crossbeam 3 23. The first spacing is between crossbeam 1 21 and crossbeam 22, and the second spacing is between crossbeam 22 and crossbeam 3 23. The first spacing and the second spacing match the multi-angle test fixture 3 and are fixed at a distance. During the use of the fixture, no adjustment or switching is required. Multiple fixtures can be directly suspended in place at one time through different crossbeam combinations, which improves the convenience and speed of fixture hanging and switching operations.

[0057] The flame calibration fixture 3 includes a hanging assembly and several clamping components fixedly connected to the hanging assembly; the clamping components are used to clamp the flame testing device; it also includes several fine-tuning mechanisms that cooperate with the clamping components to adjust the position of the flame testing device.

[0058] In this embodiment, as Figure 2As shown, the hanging assembly includes a left hanging plate 31, a right hanging plate 32, a base plate 33 fixedly connected between the left and right hanging plates, a height indicator clamping assembly 34 and a thermocouple clamping assembly 35 fixedly mounted on the base plate, and a first fine-tuning mechanism 38 and a second fine-tuning mechanism 39 that cooperate with the corresponding clamping assemblies to adjust the position of the height indicator 36 and the thermocouple. In this embodiment, the left hanging plate 31 and the right hanging plate 32 have three irregularly shaped holes 310, as shown in the figure. This structure is ergonomic and adaptable to the beam structure, enabling the entire fixture to be quickly and smoothly suspended on the bracket. The height indicator 36 has toothed structures with different sizes and spacings on both sides, which can adapt to the flame height testing requirements of different test types and has high versatility. The first fine-tuning mechanism 38 adjusts the vertical position of the height indicator 36 by rotating the knob, so that the position of the flame height indicator and the Bunsen burner nozzle meet the distance requirements for different types of combustion tests; the second fine-tuning mechanism 39 adjusts the vertical position of the thermocouple by rotating the knob, and the thermocouple clamping assembly is also provided with a limit bar 37 to ensure the lateral relative position of the flame and the thermocouple and improve the accuracy of flame center alignment.

[0059] The multi-angle test fixture 4 includes one or more fixtures with several suspension components, used to select the appropriate fixture according to the test type, place it in the combustion chamber, and clamp the corresponding test piece for combustion test; the several suspension components have a fixed spacing, which is adapted to the spacing of the corresponding crossbeam combination, and is used to directly suspend the fixture on the bracket.

[0060] In this embodiment, a vertical clamp 42, a horizontal clamp 43, a first angle clamp, and a second angle clamp are included for clamping the corresponding test pieces. In this embodiment, the first angle clamp is a 60-degree clamp 44, and the second angle clamp is a 45-degree clamp 45. The vertical clamp 42 and the horizontal clamp 43 are used for combustion tests of materials inside the cabin (including coatings or finishes for materials), the 45-degree clamp 45 is used for combustion tests of all other materials in the cargo hold or baggage hold, and the 60-degree clamp 44 is used for combustion tests of the insulation of wires or cables installed in any area of ​​the fuselage.

[0061] like Figure 1 , Figure 3 , Figure 4As shown, the vertical clamp 42, horizontal clamp 43, and first angle clamp (60-degree clamp 44) all have several suspension components. In this embodiment, they are formed by opening hook-type irregular hole structures in the suspension plates. The vertical clamp, horizontal clamp, and flame calibration clamp use the same mechanism, but the hanging plates and irregular holes of different sizes can be stably, firmly, and quickly suspended between the first and second crossbeams, achieving the same effect as the flame calibration clamp. The purpose of this design is to improve uniformity and compatibility, and to increase adjustment flexibility. Due to the tilt angle, the first angle clamp (60-degree clamp 44) has a complex clamp structure, so the suspension components and irregular hole structures are different to adapt to clamps with angles, facilitating quick suspension between the three crossbeams and improving stability and firmness. Specifically, as shown... Figure 6 As shown. In other embodiments, clamps at different angles can be appropriately shaped according to their own size and the ease of suspension, adapting to different beam combinations; the plurality of suspension components have a fixed spacing, which is adapted to the spacing of the corresponding beam combination, and is used to directly suspend the corresponding clamps on the corresponding beam combination of the support through the plurality of suspension components. In this embodiment, specifically, the spacing of the irregular holes on the same side or on the same plate of the suspension components is determined by comprehensively considering the size of the clamps and the stability of the beam support, and the spacing of the irregular holes of the flame calibration clamps is determined to achieve direct suspension. Then, the spacing of the irregular holes of the vertical clamps and the horizontal clamps is determined by using the spacing of the irregular holes of the flame calibration clamps to achieve direct suspension. The spacing of the first irregular hole and the second irregular hole on the hanging plate of the first angle clamp is determined by using the first spacing. According to the size requirements of the first angle clamp and the stability of the beam support, the second spacing and the spacing of the second and third irregular holes are determined, and the length of the third beam is determined according to the tilt angle. This structure is set with matching dimensions, which can improve the suspension stability, suspension convenience and clamp modification ease.

[0062] like Figure 5 As shown, the second angle fixture has a base for directly approaching the flame-spraying device to conduct corresponding combustion tests. In this embodiment, it is a 45-degree fixture 45. Due to the special structural features of the test specimen and the rotation requirements of the test, the overall fixture includes a base 451, a rotating and moving mechanism 452 fixedly mounted on the base, and a sample placement frame 453 welded at a 45-degree angle to the rotating and moving mechanism. The rotating and moving mechanism 452 is used to rotate 360 ​​degrees and move the sample placement frame 453 up and down. The base design satisfies the rotation requirements, and the movable design reduces the volume of the combustion chamber, further achieving miniaturization.

[0063] In this embodiment, the dimensions of the clamping part of each fixture are determined by the relative position of the sample to the Bunsen lamp after it is mounted on the fixture and hung on the corresponding crossbeam. Once the fixture and sample are positioned, the distance requirements between the sample and the Bunsen lamp inlet can be directly met, namely 19.1 mm for horizontal and vertical combustion, and 25.4 mm for 45-degree and 60-degree combustion. The dimensions of the vertical fixture must meet the requirement of an exposed area of ​​51 mm * 305 mm. It is recommended that the sample size for vertical combustion tests be at least 76 mm * 305 mm. In this embodiment, the vertical fixture size is 102 mm * 330 mm. This size range can accommodate various vertical test specimens, providing them with a stable, secure, and size-matched specimen placement platform. The dimensions of the horizontal clamp must meet the requirement of an exposed area of ​​51mm*305mm. It is recommended that the size of the horizontal combustion test specimen be at least 76mm*305mm. The size of the clamping plate is determined within this range. In this embodiment, the size of the horizontal clamping plate is 102mm*330mm. This size range can accommodate various horizontal combustion test specimens, improving versatility. It is recommended that the size of the 60-degree combustion test specimen be at least 762mm in length. The size of the diagonal bar is determined within this range. In this embodiment, the diagonal bar is 300mm in length. This size range can accommodate various linear specimens, improving versatility.

[0064] like Figure 6 As shown, the flame-spraying device 5 includes a combustion torch 51, a torch holder, a torch stroke control device, and an automatic ignition device. The torch holder is fixedly installed inside the housing and includes several support rods and a three-section multi-angle positioning platform fixedly installed on the support rods. The support rods are fixedly installed between the third and fourth side plates of the housing, with their height between the second and third crossbeams, ensuring that the flame is positioned below the test piece for the combustion test. The three-section multi-angle positioning platform includes multi-angle positioning plates 53 symmetrically installed on both sides of the support rods 52 and having the same structure. The positioning plates have through slots 54, which are sequentially configured as a horizontal section, a second angle section, and a first angle section, cooperating with the torch stroke control device to achieve multi-angle fixing and corresponding position movement of the torch.

[0065] The torch stroke control device is mounted on a three-section multi-angle positioning platform, and the combustion torch is mounted on the torch stroke control device. Specifically, the torch stroke control device includes a pushing component 55, a timing component 56, and an automatic ejection component 57. It is used to move the combustion torch 51 on the three-section multi-angle positioning platform by pushing component 55. After contacting the timing component 56 and the automatic ejection component 57, the timing component 56 starts timing the corresponding test time. After the time is up, the automatic ejection component 57 pushes the combustion torch away from the test piece.

[0066] In this embodiment, the pushing component 55 is an electric push rod, which is a sleeve-type push rod, including two fixed rods and a movable rod and a corresponding driving device. The fixed rods can be fixed in the horizontal section, the second angle section or the first angle section. The driving device drives the movable rod to move on the fixed rods. The length of the movable rod is less than that of the fixed rods.

[0067] The burner torch 51 is mounted on the pushing assembly 55. In this embodiment, the burner torch 51 is mounted on the movable rod, which allows the burner torch 51 to move between the two positioning plates 53 under the action of the driving device. Specifically, the moving positions include a calibration position, an end position, and a test position. The calibration position is the initial position of the burner torch 51, used for flame calibration and ignition. The end position is the position where the burner torch 51 is away from the test piece 41 after the combustion test ends. The test position is the position where the burner torch 51 burns the test piece 41. The end position is set between the calibration position and the test position, and the distance between the end position and the test position is greater than the distance between the end position and the calibration position. The distance between the end position and the test position is controlled within the range of 10-20cm. This distance setting can ensure that the flame effectively leaves the test piece 41, maintains a suitable distance, and avoids mutual interference.

[0068] The fixing rod is fixed to the horizontal section by bolts. The combustion torch 51 is in an upright position with the flame pointing vertically upward. It works with the vertical clamp 42 and the horizontal clamp 43 to complete the vertical combustion test and the horizontal combustion test. The fixing rod is fixed to the second angle and the first angle section. The combustion torch 51 is tilted at the corresponding angle and works with the corresponding 60-degree clamp 44 to complete the corresponding combustion test. The angle of the combustion torch 51 is adjusted in this way. The operation is convenient and the positioning platform can be used to directly position it to ensure accuracy.

[0069] The timing component 56 includes a timing start trigger mounted on a fixed rod. The automatic ejection component 57 is electrically connected to the timing component 56 and is controlled by the timing component 56. When the combustion torch 51 is pushed to the test position, it physically impacts the timing start trigger to start the timing. At the same time, it makes close contact with the action part of the automatic ejection device. After the timing is reached, the action part of the automatic ejection device ejects the combustion torch 51 away from the test specimen 41. The automatic ejection device is electrically connected to the driving device of the pushing component 55 and can control the ejected combustion torch 51 to move to the end position. The flame test specimen is removed after 12s or 60s for vertical combustion test, after 15s for horizontal combustion test, and after 30s for 45-degree combustion test and 60-degree combustion test.

[0070] The automatic ignition device is installed on the combustion torch 51 and includes an automatic igniter. When the combustion torch 51 is extinguished, the automatic igniter is controlled by an external control device to reignite it without opening the combustion chamber. The ignition time is controlled within 0.5 seconds, improving the reignition speed and the quality of the reignition flame. Several induction probes are arranged inside the chamber to collect data including the temperature, pressure, and smoke concentration inside the chamber. The automatic igniter can be controlled according to the real-time temperature and pressure at the moment the combustion torch 51 is extinguished and the flame requirements of the combustion test type, so that the flame can be quickly restored to meet the test requirements.

[0071] like Figure 7 As shown, based on an aviation combustion chamber, an integrated aviation combustion test platform is also provided, which also includes a temperature control device installed inside the chamber and a control device installed on the outer side of the chamber.

[0072] The temperature control device includes a smoke extraction component and a heat dissipation component, both mounted on the top plate of the housing 1. In this embodiment, the smoke extraction component includes a smoke extractor, and ventilation holes are provided on the side of the bottom of the housing. The heat dissipation component includes a cooler. The control device includes an instruction module, a data acquisition module, an analysis and judgment module, and a recording and display module. The control device is electrically connected to the temperature control device (including the smoke extraction component and the heat dissipation component), the torch stroke control device, the automatic ignition device, and several sensors. The instruction module is used to send instructions to the corresponding devices, such as the test time, which can be issued through a knob-type test time control device, for 12s, 15s, 30s, and 60s. The data acquisition module collects data including flame height, flame temperature, torch 51 position, and timing component 56 time through corresponding data lines, and transmits it to the control device via an RS485 serial port. The analysis and judgment module compares and analyzes the data collected by the data acquisition module with the instructions and outputs the results to the instruction module. The recording and display module is used for data recording and display, such as recording and displaying the test time using an LCD screen.

[0073] like Figure 8 As shown, the solution using this integrated combustion chamber and combustion test platform includes the following steps:

[0074] Step 1: Flame Calibration

[0075] S11, Adjust the burner to the horizontal section of the three-section multi-angle positioning platform so that the burner is in a vertical position; Move the burner to the calibration position through the burner stroke control device;

[0076] S12, the flame calibration fixture is suspended at the corresponding position on the bracket, and the height indicator and thermocouple are clamped at the corresponding positions of the height indicator clamping assembly and the thermocouple clamping assembly respectively; in this embodiment, the bracket beam has positioning mark lines for each fixture, so as to accurately position and quickly install the fixture.

[0077] S13, the position of the height indicator is adjusted by the first fine-tuning mechanism to ensure that the relative position of the flame height indicator and the combustion torch nozzle meets the requirements of the combustion test, and the position of the thermocouple is adjusted by the second fine-tuning mechanism to ensure that the temperature measuring point is at the geometric center of the flame;

[0078] S14, Set the airflow and pressure, and perform flame calibration by ignition; in this embodiment, this can be set via an external control device.

[0079] Step 2: Fixture Installation

[0080] S21. Select the appropriate multi-angle test fixture according to the type of combustion test;

[0081] S22, When a vertical clamp, a horizontal clamp, or a first angle clamp is selected, the clamp is directly suspended on the corresponding crossbeam assembly of the support using several suspension components of the clamp to hold the corresponding test piece.

[0082] When the second angle fixture is selected, the base is used to push the entire fixture to the corresponding position to clamp the corresponding test piece;

[0083] Step 3: Combustion Test

[0084] S31, Select the test time according to the type of combustion test; in this embodiment, the test time control device knob of the external control device can be set.

[0085] S32, after ignition and waiting for the flame to stabilize, the burner is moved to the test position by the burner stroke control device, triggering the timing component to start timing, and the burner contacts the automatic ejection device; when the flame goes out, the timing stops, and the burner is re-ignited by the automatic ignition device, and the timing continues.

[0086] S33, when the test time is up, the burner is moved to the end position and away from the test piece by the burner stroke control device; specifically, the burner is popped away from the test piece by the action part of the automatic pop-out device.

[0087] Step 4: Fixture Replacement

[0088] S41, Remove or push away the fixture at the end of the test;

[0089] S42, directly suspend or advance the fixture required for the next test type.

[0090] Compared with existing technologies, conventional combustion tests are conducted in the horizontal, vertical, or specific angles. It is generally believed that the combustion direction is affected by gravity and airflow, and that it maintains a specific direction during the combustion time. A few specific angles are sufficient for current combustion tests, so those skilled in the art have no incentive to test more different angles.

[0091] Currently, one of the technical contradictions in the existing technology lies in the clamping force of the fixture and the maintenance of its angle. During the combustion process, the clamping device will inevitably burn as well, leading to an interlocking reaction. From fixture deformation to loosening of the clamping force, and then to the change and offset of a specific angle of the fixture, it seems that the same fixture is used, but its offset error cannot actually be fixed at the same angle, which affects the test accuracy.

[0092] The second technical contradiction in the existing technology lies in the fact that in the conventional combustion test, each angle of the fixture is used to test different test pieces, and the test is independent. The sufficiency of combustion is not significantly affected by the adjustment of the fixture. However, if multiple angles need to be tested for the same test piece during combustion, the time spent adjusting the fixture angle using the existing technology will waste combustion heat. From ignition to the end of combustion, the heat generated by combustion and the spread of combustion will change over time. Conventional test equipment requires special pre-setting for angle adjustment, and each test can only test one angle state. If multiple angle changes are forcibly made during combustion, the time spent on angle adjustment will lead to insufficient combustion.

[0093] Compared with existing technologies, the structural design of this invention minimizes the burning of the fixture within the required testing time, focusing only on the test piece. This ensures that the clamping force meets the requirements within the testing time and does not loosen. The structure also facilitates adjustments to various angle positions, resolving one of the contradictions in existing technologies. Furthermore, the suspension component of this invention allows for rapid angle adjustments, significantly reducing the adjustment time from 30-80 minutes to less than 10 seconds without affecting the burning process. This more realistically simulates the impact of actual burning on the test piece, resulting in more accurate test results and resolving the second contradiction in existing technologies.

[0094] Meanwhile, the suspension and switching design of the clamps can greatly reduce clamp switching time and improve clamp switching efficiency. In addition, only one type of clamp needs to be placed in the combustion chamber for each combustion test, which makes the combustion chamber more compact. Other clamps can be placed outside the chamber when not in use, which can effectively avoid the influence of the combustion environment inside the chamber on the clamps, extend the service life of the clamps and improve the clamping quality accuracy. The special design of the torch holder can make the torch angle switching quick and accurate. In conjunction with the torch stroke control device and the automatic ignition device, the torch displacement can be effectively controlled and the speed of flame removal and re-ignition can be controlled, improving the accuracy of test results.

[0095] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An aviation combustion chamber, characterized in that, Includes housing, support frame, flame calibration fixture, multi-angle test fixture, and flame-spraying device; The bracket is fixedly installed inside the box and includes several crossbeams with a fixed spacing. The flame calibration fixture includes a hanging assembly and several clamping components fixedly connected to the hanging assembly; the clamping components are used to clamp the flame testing device; it also includes several fine-tuning mechanisms that cooperate with the clamping components to adjust the position of the flame testing device; the hanging assembly includes a left hanging plate, a right hanging plate, a base plate fixedly connected between the left hanging plate and the right hanging plate, a flame testing device clamping assembly fixedly installed on the base plate, and a first fine-tuning mechanism and a second fine-tuning mechanism that cooperate with the corresponding clamping components to adjust the position of the flame testing device; The multi-angle test fixture includes one or more fixtures with several suspension components, used to select the appropriate fixture according to the test type, place it in the combustion chamber, and clamp the corresponding test piece for combustion test; the several suspension components have a fixed spacing, which is adapted to the spacing of the corresponding crossbeam combination, and is used to directly suspend the fixture on the bracket; the fixture with several suspension components includes a vertical fixture, a horizontal fixture, and a first angle fixture; The flame-throwing device includes a combustion torch, a torch holder, a torch stroke control device, and an automatic ignition device. The torch holder is fixedly installed inside the housing and includes a three-section multi-angle positioning platform. The combustion torch and the torch stroke control device are installed on the three-section multi-angle positioning platform and are used to adjust the angle and displacement stroke of the combustion torch. The automatic ignition device is installed on the combustion torch. The torch stroke control device includes a pushing component, a timing component, and an automatic ejection component. It is used to move the combustion torch on the three-section multi-angle positioning platform by pushing the pushing component. When the combustion torch contacts the timing component and the automatic ejection component, the timing component starts timing the corresponding test time. After the time is up, the automatic ejection component pushes the combustion torch away from the test piece. The multi-angle test fixture also includes a second angle fixture with a base, which is used to directly approach the flame device to conduct corresponding combustion tests. The dimensions of the clamping part of each clamp in the multi-angle test fixture are determined by the relative position of the sample and the combustion torch after the sample is installed on the fixture and hung on the corresponding crossbeam. Once the fixture and the sample are positioned, the distance requirement between the sample and the nozzle of the combustion torch is directly met. The moving positions of the combustion torch include the calibration position, the end position, and the test position. The calibration position is the initial position of the combustion torch, used for flame calibration and ignition. The end position is the position where the combustion test ends and the combustion torch moves away from the test piece. The test position is the position where the combustion torch burns the test piece. The end position is set between the calibration position and the test position. The distance between the end position and the test position is greater than the distance between the end position and the calibration position. The three-section multi-angle positioning platform includes a support plate and multi-angle positioning plates symmetrically installed on both sides of the support plate with the same structure; the positioning plates have through slots, which are sequentially set as a horizontal section, a second angle section and a first angle section, and cooperate with the torch stroke control device to fix the combustion torch at multiple angles and move the corresponding position, wherein the first angle is greater than the second angle; The pushing component is an electric push rod, which is a sleeve-type push rod including two fixed rods, a movable rod, and a corresponding driving device. The combustion torch is mounted on the movable rod, and the driving device drives the movable rod to move on the fixed rod. When the fixed rod is fixed in the horizontal section, the combustion torch is in an upright position with the flame pointing vertically upward. It cooperates with the vertical and horizontal clamps to complete the vertical combustion test and the horizontal combustion test. When the fixed rod is fixed in the second angle and the first angle section, the combustion torch is tilted at the corresponding angle, and it cooperates with the corresponding angle clamp to complete the corresponding combustion test.

2. The aviation combustion chamber according to claim 1, characterized in that, The flame testing device includes a height indicator and a thermocouple.

3. The aviation combustion chamber according to claim 2, characterized in that, The corresponding clamping assembly of the thermocouple is provided with a limit bar.

4. An integrated combustion testing platform for aviation, characterized in that, The invention includes an aviation combustion chamber as described in any one of claims 1-3; it also includes a smoke exhaust assembly installed inside the chamber and a control device installed on the outer side of the chamber; the smoke exhaust assembly is used to maintain a combustion environment inside the combustion chamber that is compatible with the type of combustion test; the control device includes an instruction module, a data acquisition module, an analysis and judgment module, and a recording and display module for performing combustion test analysis; the control device is electrically connected to the smoke exhaust assembly, the torch stroke control device, and the automatic ignition device.

5. The integrated combustion test platform for aviation as described in claim 4, characterized in that, The smoke extraction assembly includes a smoke extractor; ventilation holes are provided on the bottom side of the housing.

6. The integrated combustion test platform for aviation as described in claim 4, characterized in that, The data acquisition module collects data including flame height, flame temperature, burner position, timing component time, chamber temperature, pressure, and flue gas concentration.

7. A combustion test method for aircraft, characterized in that, Using an aviation combustion chamber according to any one of claims 1-3; comprising the following steps: Step 1: Flame Calibration S11, Adjust the burner to the horizontal section of the three-section multi-angle positioning platform so that the burner is in a vertical position; Move the burner to the calibration position through the burner stroke control device; S12, suspend the flame calibration fixture at the corresponding position on the bracket, and clamp the height indicator and thermocouple at the corresponding positions of the height indicator clamping assembly and the thermocouple clamping assembly respectively. S13, the position of the height indicator is adjusted by the first fine-tuning mechanism to ensure that the relative position of the flame height indicator and the combustion torch nozzle meets the requirements of the combustion test, and the position of the thermocouple is adjusted by the second fine-tuning mechanism to ensure that the temperature measuring point is at the geometric center of the flame; S14, set the airflow and pressure, ignite and perform flame calibration; Step 2: Fixture Installation S21. Select the appropriate multi-angle test fixture according to the type of combustion test; S22, When a vertical clamp, a horizontal clamp, or a first angle clamp is selected, the clamp is directly suspended on the corresponding crossbeam assembly of the support using several suspension components of the clamp to hold the corresponding test piece. When the second angle fixture is selected, the base is used to push the entire fixture to the corresponding position to clamp the corresponding test piece; Step 3: Combustion Test S31, Select the test time according to the type of combustion test; S32, after ignition and waiting for the flame to stabilize, the combustion torch is moved to the test position by the torch stroke control device, and the timing component is triggered to start timing at the same time. S33, Test time is up. Use the torch stroke control device to move the combustion torch to the end position and away from the test piece. Step 4: Fixture Replacement S41, Remove or push away the fixture at the end of the test; S42, directly suspend or advance the fixture required for the next test type.

8. The combustion test method for aircraft according to claim 7, characterized in that, Step 3S32 also includes pausing the timer when the flame goes out, and then re-igniting the burner via an automatic ignition device to resume the timer.

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