A powder actuated tool testing device

Abstract

The present application relates to a kind of powder starting test device, solve the existing powder starting test bench cannot simulate high altitude low pressure environment, and powder starting test needs to be completed in dependence on whole machine test and on high altitude test stand, lead to test cost is high, research cycle is long and cannot early obtain component performance and flame propagation law Problem.It includes closed box, air pump, air pump, temperature measuring device, flame generator, barometer and multiple groups of cameras;Pressure in closed box is adjusted by air pump and air pump cooperation, simulate different altitude environment;Temperature measuring device can move along horizontal direction, temperature distribution in flame field is inducted by grid-like temperature indicating paint, cooperate multiple groups of cameras to capture flame range and propagation distance, realize the accurate test of the combustion performance of powder starting device under different altitude environment.The present application is compact in structure, convenient to operate, low in test cost, short in cycle, can early obtain key performance data, provide reliable support for the optimization design of powder starting device.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine testing, specifically relating to a gunpowder starting test device, and more particularly to a gunpowder starting test device for simulating different altitude environments and testing the combustion performance and flame propagation law of the gunpowder starting device. Background Technology

[0002] The propellant starting device is a crucial component of power equipment such as aero engines, and its starting performance directly affects the reliability and stability of the power equipment. In high-altitude environments, low air pressure significantly impacts the combustion efficiency, flame propagation speed, and component performance of the propellant starting device. Therefore, starting performance testing in high-altitude environments is a critical step in the development of propellant starting devices.

[0003] In existing technologies, the function of gunpowder starting test benches is limited to testing at normal temperature and pressure, lacking the ability to create a vacuum or regulate the pressure inside the chamber, and thus unable to simulate the low-pressure environment at high altitudes. To test starting performance and the entire gunpowder starting process under high-altitude conditions, a specialized high-altitude simulation test bench designed for engine testing is required. While such high-altitude benches can create a vacuum environment equivalent to altitudes of several thousand or even tens of thousands of meters, they suffer from the following core drawbacks: First, the equipment is large-scale and expensive, resulting in extremely high testing costs; second, the testing process is complex and the preparation period is long, making it impossible to conduct targeted testing in the early stages of gunpowder starting device development; third, they can only achieve engine-level testing, making it difficult to obtain performance data and flame propagation patterns of individual gunpowder starting device components, which is detrimental to rapid iterative optimization during the development process. These problems severely restrict the development efficiency and performance improvement of gunpowder starting devices. Summary of the Invention

[0004] This invention provides a gunpowder ignition test device, which solves the following technical problems: (1) The existing test bench cannot adjust the pressure and cannot simulate the high-altitude low-pressure environment; (2) High-altitude environment testing relies on high-altitude simulation test benches, which leads to high testing costs and long testing cycles; (3) The problem of not being able to obtain the performance of the gunpowder starting device components and the flame propagation law in the early stage of research and development.

[0005] To solve the above technical problems, the present invention provides a gunpowder ignition test device, characterized in that it includes a sealed chamber 1, an air filling pump 2, an air extraction pump 3, a temperature measuring device 4, a flame generator 5, a pressure gauge 6, and an image acquisition component; the air filling pump 2 and the air extraction pump 3 are both connected to the sealed chamber 1, and the pressure gauge 6 is fixed on the sealed chamber 1; the temperature measuring device 4 is movably installed inside the sealed chamber 1 along its length, the flame generator 5 is located at one end inside the sealed chamber 1 with its spray direction facing the temperature measuring device 4, and the image acquisition component... The assembly is installed on the sealed box 1; the temperature measuring device 4 includes a horizontal guide rail 41, a vertical plate 42, a fixing frame 43, and a temperature indicator paint 44; the horizontal guide rail 41 is fixed inside the sealed box 1, the vertical plate 42 is movably installed inside the horizontal guide rail 41, the fixing frame 43 is fixed on the vertical plate 42, and the temperature indicator paint 44 is fixed on the fixing frame 43 and has a grid structure, which changes color with temperature; air is filled in by the air pump 2 and extracted by the air pump 3 to adjust the air pressure inside the sealed box 1 to simulate different altitude environments.

[0006] Furthermore, the temperature-indicating paint 44 is fixedly connected to the fixing frame 43 by bolts.

[0007] Furthermore, the horizontal guide rail 41 is provided with a threaded rod 48, which is threadedly connected to the lower end of the vertical plate 42. A servo motor 49 is fixed to one end of the horizontal guide rail 41, and the output shaft of the servo motor 49 is fixedly connected to one end of the threaded rod 48.

[0008] Furthermore, the flame generator 5 includes a bracket 51, a nozzle 52, a propellant chamber 53, a flame tube 54, and an igniter 55; the nozzle 52 is installed inside the sealed box 1 via the bracket 51, the propellant chamber 53 is located outside the sealed box 1, the flame tube 54 connects the propellant chamber 53 and the nozzle 52, and the igniter 55 is installed on the flame tube 54.

[0009] Furthermore, the image acquisition component includes a first camera 45, a second camera 47, and a rangefinder camera 46; the first camera 45 and the second camera 47 are installed on the side of the sealed box 1, and the rangefinder camera 46 is installed on the top of the sealed box 1, all three of which are equipped with high-speed automatic shooting cameras.

[0010] Furthermore, the nozzle 52 of the flame generator 5 faces the temperature indicator paint 44 of the temperature measuring device 4, and the position of the temperature indicator paint 44 is adjusted by moving the upright plate 42 to obtain the flame field distribution at different distances.

[0011] Furthermore, the temperature-indicating paint 44 is a grid array type high-temperature resistant reversible temperature-indicating paint with a temperature measurement range of 500℃–1500℃, and can be detachably installed on the fixing frame 43 by bolts.

[0012] Furthermore, the sealed chamber 1 is a pressure-bearing sealed chamber with a working pressure range of -0.1MPa to 0.3MPa, which can simulate the air pressure environment at different altitudes.

[0013] Furthermore, the air pump 2 is used to increase the pressure, and the air pump 3 is used to decrease the pressure. The two are linked in a closed-loop control to keep the pressure inside the sealed box 1 stable at the target value.

[0014] Furthermore, during the experiment, the barometer recorded the pressure data inside the sealed chamber in real time to ensure the accuracy of the environmental simulation; the images captured by camera one and camera two were used to analyze the shape and coverage of the flame, and the images recorded by the rangefinder camera were used to calculate the flame propagation speed and distance; the color change of the temperature indicator paint was converted into specific temperature data through image acquisition and color analysis, and combined with grid coordinates to generate a temperature distribution map of the flame field.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant beneficial effects: (1) Realize multi-altitude environment simulation: Through the coordinated work of the air pump and the air pump, the pressure inside the sealed box can be flexibly adjusted to accurately simulate the air pressure environment at different altitudes. It does not need to rely on the high-altitude simulation test stand, which solves the problem that the existing test stand cannot simulate the high-altitude environment.

[0016] (2) Reduced testing costs and cycle: The device has a compact structure, low cost, and simple operation process. Targeted testing can be carried out in the early stage of the development of gunpowder starting device without waiting for the whole machine to be integrated, which greatly reduces the investment in testing funds and shortens the development cycle.

[0017] (3) Obtain comprehensive test data: By combining the grid-shaped temperature-indicating paint with multiple high-speed cameras, the temperature distribution, flame range and propagation law of the flame field can be obtained simultaneously. At the same time, test data at different distances can be obtained by moving the temperature measurement device, providing a comprehensive and accurate basis for component performance optimization.

[0018] (4) Convenient operation and strong adaptability: The temperature indicator paint is fixed with bolts, which is easy to disassemble and replace, and can be adapted to the testing needs of different temperature ranges; the upright plate is driven by a servo motor, which moves with precision and has a high degree of automation, reducing the intensity of manual operation and improving the efficiency of the test.

[0019] The present invention has a reasonable structural design and strong practicality, and can be widely used in the research and development and performance testing of gunpowder starting devices, especially suitable for special testing in high-altitude environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the temperature measuring device. Legend: 1. Sealed box; 2. Air pump; 3. Air extraction pump; 4. Temperature measuring device; 41. Horizontal guide rail; 42. Vertical plate; 43. Fixture; 44. Temperature indicator paint; 45. Camera 1; 46. Rangefinder camera; 47. Camera 2; 48. Threaded rod; 49. Servo motor; 5. Flame generator; 51. Support; 52. Nozzle; 53. Purification chamber; 54. Flame tube; 55. Igniter; 6. Pressure gauge. Detailed Implementation

[0021] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below.

[0022] The present invention provides a gunpowder ignition test device, comprising: Sealed Chamber 1: Provides a closed space for testing, used to house various functional components and simulate air pressure environments at different altitudes; Air pump 2: connected to sealed box 1, used to fill the sealed box 1 with air to increase the air pressure inside the sealed box 1; Air pump 3: Connected to sealed box 1, used to extract air from sealed box 1 to reduce the air pressure inside sealed box 1. Through the coordinated inflation and deflation of air pump 2 and air pump 3, the air pressure inside sealed box 1 can be flexibly adjusted, thereby accurately simulating the air environment at different altitudes. Barometer 6: Fixedly installed on the sealed box 1, used to monitor the air pressure inside the sealed box 1 in real time, so that the operator can understand the environmental simulation status. Temperature measuring device 4: Movably installed along the length of the sealed box 1, used to detect the temperature distribution of the flame field. It includes a horizontal guide rail 41 fixed inside the sealed box 1, a vertical plate 42 movably installed inside the horizontal guide rail 41, a fixing frame 43 fixed on the vertical plate 42, and a temperature-indicating paint 44 fixedly connected to the fixing frame 43. The temperature-indicating paint 44 is a grid-shaped temperature-indicating paint arranged according to coordinate positions. During the test, it can show different colors according to different temperatures to intuitively reflect the temperature distribution of the flame field. The temperature-indicating paint 44 is fixed to the fixing frame 43 by bolts for easy disassembly and replacement. Flame generator 5: Located at one end inside the sealed chamber 1, with its spray direction facing the temperature indicator paint 44 of the temperature measuring device 4, used to generate the flame required for the test; the flame generator 5 includes a nozzle 52 installed inside the sealed chamber 1 via a bracket 51, a propellant chamber 53 located outside the sealed chamber 1, a flame tube 54 connecting the propellant chamber 53 and the nozzle 52, and an igniter 55 installed on the flame tube 54; the propellant chamber 53 is pre-filled with propellant, and when the igniter 55 is working, it can ignite the propellant, and the flame generated by combustion is guided by the flame tube 54 and sprayed out through the nozzle 52 towards the temperature indicator paint 44; Image acquisition components include camera 45 and camera 47 mounted on the side of the sealed box 1, and rangefinder camera 46 mounted on the top of the sealed box 1. All three have high-speed automatic photo-taking function. Camera 45 and camera 47 are used to detect the flame range, and rangefinder camera 46 is used to record the flame propagation distance.

[0023] Furthermore, to achieve precise movement of the upright plate 42 and obtain the flame field distribution at different distances, a threaded rod 48 is rotatably provided inside the horizontal guide rail 41. The threaded rod 48 is threadedly connected to the lower end of the upright plate 42. A servo motor 49 is fixed to one end of the horizontal guide rail 41, and the output shaft of the servo motor 49 is fixedly connected to one end of the threaded rod 48. By rotating the output shaft of the servo motor 49, the threaded rod 48 is driven to rotate synchronously, thereby driving the upright plate 42 to move linearly along the horizontal guide rail 41 to achieve multi-distance measurement point testing.

[0024] Example: The selection and installation methods for each component are as follows: (1) Sealed chamber 1: Made of stainless steel, with a volume of 5m³, the chamber has excellent sealing performance and can withstand a pressure range of -0.1MPa to 0.3MPa, ensuring the reliability of high-altitude low-pressure environment simulation; the air pump 2 is a small high-pressure air pump (model: GA-55) with a rated exhaust pressure of 0.8MPa, and the air pump 3 is a rotary vane vacuum pump (model: 2XZ-4) with an ultimate vacuum degree ≤6×10 -2 Pa, the two are sealed and connected to the interface of the sealed box 1 through a pressure-resistant pipe; the pressure gauge 6 is a digital pressure gauge (accuracy class 0.4, measuring range -0.1MPa to 0.6MPa), which is fixed to the side of the sealed box 1 through a threaded interface to display the pressure inside the box in real time.

[0025] (2) Temperature measuring device 4: The horizontal guide rail 41 is made of aluminum alloy and is 3m long. It is fixed on the pre-set bracket at the bottom of the sealed box 1. The vertical plate 42 is a high temperature resistant plastic plate with a thickness of 20mm. The lower end of the plate is provided with a threaded hole that matches the threaded rod 48. The fixing frame 43 is a steel frame that is fixed to the front of the vertical plate 42 by welding. The temperature indicating paint 44 is a reversible high temperature indicating paint (temperature range 500℃-1500℃). It is applied to the high temperature resistant substrate with a grid spacing of 10mm×10mm. The substrate is connected to the fixing frame 43 by bolts. The servo motor 49 is a stepper servo motor (model: MS-130ST-M15015) with a rated speed of 3000rpm. It is fixed to one end of the horizontal guide rail 41 by a motor mount. The output shaft is fixedly connected to the threaded rod 48 (material 45 steel, pitch 2mm) by a coupling.

[0026] (3) Flame generator 5: The bracket 51 is a steel tripod, fixed in one corner inside the sealed box 1; the nozzle 52 is made of stainless steel with a spray diameter of 10mm; the propellant chamber 53 is a sealed steel container, and the propellant can be pre-filled and replaced as needed. It is connected to the flame tube 54 (made of 310S stainless steel with an inner diameter of 20mm) through a flange; the igniter 55 is a high-voltage igniter (ignition voltage 15kV), installed at the end of the flame tube 54 near the propellant chamber 53.

[0027] (4) Image acquisition components: Camera 1 45 and Camera 2 47 are high-speed industrial cameras (model: Baslerac A2500-14uc), with a frame rate of 100fps and a resolution of 2592×1944. They are fixed inside the observation windows on both sides of the sealed box 1 by brackets; the ranging camera 46 is a laser ranging camera (model: Keyence XG-X200), with a measurement range of 0.5m-10m and an accuracy of ±1mm. It is installed at the center of the top of the sealed box 1, with the lens facing the temperature measuring device 4.

[0028] The specific testing procedure for this device is as follows: (1) Environmental simulation: Set the air pressure value corresponding to the target altitude according to the test requirements, start the air pump 3 to extract the air in the sealed box 1, or start the air pump 2 to fill the sealed box 1 with air. Monitor the pressure in the box in real time through the air pressure gauge 6. After the target air pressure value is reached, turn off the air pump 2 and the air pump 3 to maintain the pressure in the box.

[0029] (2) Equipment debugging: Drive the vertical plate 42 to move along the horizontal guide rail 41 by the servo motor 49, and adjust the temperature indicator paint 44 to the initial test position (such as 521m away from the nozzle); check the working status of camera 1 45, camera 2 47 and rangefinder camera 46 to ensure that they can take pictures normally; fill the pre-set amount of propellant in the medicine chamber 53 and complete the circuit connection of igniter 55.

[0030] (3) Test run: Start the igniter 55 to ignite the propellant in the chamber 53. The flame generated by the combustion of the propellant is guided by the flame tube 54 and sprayed into the temperature indicator paint 44 through the nozzle 52. At the same time, start three sets of cameras to automatically capture the range, shape and propagation process of the flame at high speed. The temperature indicator paint 44 changes color with the flame temperature and records the temperature distribution characteristics of the flame field.

[0031] (4) Multi-distance test: According to the test requirements, the position of the upright plate 42 is gradually adjusted by the servo motor 49 (such as adjusting it to a distance of 521.5m, 2m and 2.5m from the nozzle in sequence), and step (3) is repeated to obtain the flame field distribution, temperature change and flame propagation data at different distances.

[0032] (5) End of test: After the propellant has burned out, turn off all cameras. After the temperature in the sealed chamber 1 drops to room temperature and the pressure returns to normal, open the chamber, remove the temperature indicator paint 44 for subsequent analysis, and clean up the test residue to complete one test cycle.

[0033] During the experiment, barometer 6 recorded the pressure data inside the sealed chamber 1 in real time to ensure the accuracy of the environmental simulation; images captured by camera 1 45 and camera 2 47 were used to analyze the flame morphology and coverage, while images recorded by rangefinder camera 46 were used to calculate the flame propagation speed and distance; the color change of the temperature-indicating paint 44 was converted into specific temperature data through image acquisition and color analysis software, and combined with grid coordinates to generate a flame field temperature distribution map. By integrating the above data, the combustion performance, flame propagation patterns, and temperature field distribution characteristics of the gunpowder starting device under specific altitude conditions can be comprehensively evaluated.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A gunpowder ignition test device, characterized in that, The system includes a sealed box (1), an air pump (2), an air extraction pump (3), a temperature measuring device (4), a flame generator (5), a pressure gauge (6), and an image acquisition component. The air pump (2) and air extraction pump (3) are connected to the sealed box (1), and the pressure gauge (6) is fixed to the sealed box (1). The temperature measuring device (4) is movably installed inside the sealed box (1) along its length. The flame generator (5) is located at one end inside the sealed box (1) with its spray direction facing the temperature measuring device (4). The image acquisition component is installed on the sealed box (1). The measuring device (4) includes a horizontal guide rail (41), a vertical plate (42), a fixing frame (43), and a temperature indicator paint (44). The horizontal guide rail (41) is fixed inside the sealed box (1), the vertical plate (42) is movably set inside the horizontal guide rail (41), the fixing frame (43) is fixed on the vertical plate (42), and the temperature indicator paint (44) is fixed on the fixing frame (43) and has a grid structure. It changes color with temperature. Air is filled in by an air pump (2) and extracted by an air pump (3). The air pressure inside the sealed box (1) is adjusted to simulate different altitude environments.

2. The gunpowder ignition test device according to claim 1, characterized in that, The temperature indicator paint (44) and the fixing frame (43) are fixedly connected by bolts.

3. The gunpowder ignition test device according to claim 1, characterized in that, The horizontal guide rail (41) is provided with a threaded rod (48), which is threaded to the lower end of the vertical plate (42). A servo motor (49) is fixed at one end of the horizontal guide rail (41), and the output shaft of the servo motor (49) is fixedly connected to one end of the threaded rod (48).

4. The gunpowder ignition test device according to claim 1, characterized in that, The flame generator (5) includes a bracket (51), a nozzle (52), a chamber (53), a flame tube (54), and an igniter (55). The nozzle (52) is installed inside the sealed box (1) via the bracket (51), the chamber (53) is located outside the sealed box (1), the flame tube (54) connects the chamber (53) and the nozzle (52), and the igniter (55) is installed on the flame tube (54).

5. The gunpowder ignition test device according to claim 1, characterized in that, The image acquisition component includes camera one (45), camera two (47) and rangefinder camera (46); camera one (45) and camera two (47) are installed on the side of the sealed box (1), and rangefinder camera (46) is installed on the top of the sealed box (1). All three are equipped with high-speed automatic shooting cameras.

6. The gunpowder ignition test device according to claim 1, characterized in that, The nozzle (52) of the flame generator (5) faces the temperature indicator paint (44) of the temperature measuring device (4). The position of the temperature indicator paint (44) is adjusted by moving the upright plate (42) to obtain the flame field distribution at different distances.

7. The gunpowder ignition test device according to claim 1, characterized in that, The temperature indicator paint (44) is a grid array type high temperature resistant reversible temperature indicator paint with a temperature measurement range of 500℃–1500℃. It can be detachably installed on the fixing frame (43) by bolts.

8. The gunpowder ignition test device according to claim 1, characterized in that, The sealed box (1) is a pressure-bearing sealed box with a working pressure range of -0.1MPa to 0.3MPa, which can simulate the air pressure environment at different altitudes.

9. The gunpowder ignition test device according to claim 1, characterized in that, The air pump (2) is used to increase pressure, and the air pump (3) is used to reduce pressure. The two are linked in a closed loop control to keep the pressure inside the sealed box (1) stable at the target value.

10. The gunpowder ignition test device according to claim 1, characterized in that, During the experiment, the barometer recorded the pressure data in the sealed chamber in real time to ensure the accuracy of the environmental simulation; the images captured by camera one and camera two were used to analyze the shape and coverage of the flame, and the images recorded by the rangefinder camera were used to calculate the flame propagation speed and distance; the color change of the temperature indicator paint was converted into specific temperature data through image acquisition and color analysis, and combined with grid coordinates to generate a temperature distribution map of the flame field.

Images