Aerospace material heat resistance testing device

Abstract

The utility model discloses a kind of aerospace material heat resistance testing devices, including high-temperature furnace body, the high-temperature furnace body front side opening and hinged with heat preservation door, the top of the high-temperature furnace body is provided with feeding opening and automatic sample feeding structure;The automatic sample feeding structure includes lifting column vertically arranged in the top of high-temperature furnace body, lifting groove is arranged in one side of the lifting column, and lifting screw is rotatably arranged in the lifting groove, and the top of the lifting column is provided with driving motor, and motor power output shaft is connected with lifting screw.The utility model relates to material testing equipment technical field, specifically provides a kind of aerospace material heat resistance testing device.

Description

Technical Field

[0001] This utility model relates to the field of material testing equipment technology, specifically to a device for testing the heat resistance of aerospace materials. Background Technology

[0002] Aerospace materials are used in critical components of spacecraft structures and must possess the ability to withstand extreme environments, including high and low temperatures, radiation, and high strength. Common types include high-temperature alloys and ceramic matrix composites. Heat resistance testing simulates high-temperature environments and tests the mechanical properties of aerospace materials under these conditions, such as strength and toughness, as well as physical properties like coefficient of thermal expansion, thermal conductivity, and chemical stability. Existing box-type high-temperature furnaces are commonly used testing devices for the heat resistance of aerospace materials. They provide a high-temperature environment through electric heating elements, with temperature monitored by thermocouples.

[0003] However, existing box-type high-temperature furnaces can only perform performance tests under static high temperatures, and the environmental simulation is singular. In actual use, aerospace materials will also face a complex environment of high temperature and high-speed airflow. Static high-temperature testing is significantly different from actual working conditions. In addition, material loading and sampling in high-temperature environments require manual operation, which is inefficient. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing box-type high-temperature furnaces can only perform performance tests under static high temperatures, resulting in a limited environmental simulation. Furthermore, manual sampling and loading under high-temperature conditions are inefficient.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The present invention proposes a heat resistance testing device for aerospace materials, including a high-temperature furnace body, wherein the front side of the high-temperature furnace body is open and hinged with a heat-insulating door, and the top of the high-temperature furnace body is provided with a feeding port and an automatic sample feeding structure.

[0006] The automatic sample feeding structure includes a lifting column vertically mounted on the top of the high-temperature furnace body. The lifting column has a lifting groove on one side and a lifting screw rotating within the lifting groove. The top of the lifting column is equipped with a drive motor, and the motor's power output shaft is connected to the lifting screw. It also includes a sealing cover for sealing and matching the feeding port. One end of the sealing cover is slidably mounted in the lifting groove and threadedly connected to the lifting screw. The bottom of the sealing cover is equipped with a connecting column, and the bottom of the connecting column is magnetically connected to a holding platform.

[0007] Preferred technical solution 1: The bottom hollow of the serving platform is provided with a connecting block in the middle and is magnetically connected to the connecting column. The side wall of the connecting block is detachably connected with a fixing component.

[0008] Preferred technical solution 2: The fixing component includes a C-shaped fixing block and two sets of locking screws connected by threads on the side walls. The other end of the locking screw is provided with a pressure plate. The pressure plate has a built-in pressure sensor and also includes a test plate that is slidably disposed in the C-shaped fixing block and is pressed and fixed by the pressure plate. The side wall of the connecting block is provided with a slot and a magnet is provided inside. The C-shaped fixing block is magnetically connected to the magnet.

[0009] Preferred technical solution 3: Three sets of U-shaped heating elements are provided on the rear wall and two side walls of the high-temperature furnace body. Multiple sets of thermocouple sensors are also evenly distributed on both sides of the interior of the high-temperature furnace body. It also includes a centrifugal fan located on the outer wall of the high-temperature furnace body. A test air outlet is provided on one side of the interior of the high-temperature furnace body and is connected to the centrifugal fan through a high-temperature resistant pipe. An air outlet is provided on the other side of the high-temperature furnace body and a corresponding air outlet sealing door is provided.

[0010] Preferred technical solution four: The top of the high-temperature furnace body is also provided with an observation window and an observation frame, and an industrial camera is installed at the bottom of the observation frame.

[0011] Preferred technical solution five: A controller is provided on the top of the high-temperature furnace body, and the thermocouple sensor, heating element, drive motor, industrial camera and pressure sensor are all electrically connected to the controller.

[0012] The heat resistance testing device for aerospace materials proposed in this utility model has the following beneficial effects achieved by adopting the above structure:

[0013] (1) Enhance the diversity of environmental simulation and the comprehensiveness of testing: By setting up centrifugal fans, test air outlets, air outlets and U-shaped heating elements, it can realize static high temperature testing and introduce airflow to form a dynamic high temperature environment, which can meet the heat resistance performance testing needs of aerospace materials in different high temperature scenarios and break through the limitation of traditional box-type high temperature furnaces that can only perform static testing.

[0014] (2) Achieve automated operation and improve testing efficiency and safety: With the help of the automatic sample feeding structure, the loading platform is automatically raised and lowered by the drive motor, lifting screw and other components to complete the sample feeding and retrieval. The magnetically connected loading platform and the sealing cover seal the feeding port, avoiding direct manual operation in high temperature environment, reducing safety hazards, and speeding up the sample loading and retrieval rhythm, thus improving the overall testing efficiency.

[0015] (3) Enhance test stability and data accuracy: The test material is firmly fixed by the fastener, and the pressure sensor can monitor the fixing pressure to ensure reliable clamping. The industrial camera, together with the pressure sensor and thermocouple sensor, can simultaneously collect data such as material appearance changes, stress conditions and ambient temperature, providing multi-dimensional and accurate test basis for material heat resistance analysis. In addition, the detachable fastener is easy to adjust flexibly according to different specifications of materials, which improves the applicability of the device. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a heat resistance testing device for aerospace materials proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the open state of a heat resistance testing device for aerospace materials proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of a heat resistance testing device for aerospace materials proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the automatic sample delivery structure of a heat resistance testing device for aerospace materials proposed in this utility model.

[0021] Among them, 1. High-temperature furnace body, 2. Insulation door, 3. Feeding port, 4. Automatic sample feeding structure, 5. Lifting column, 6. Lifting screw, 7. Drive motor, 8. Sealing cover, 9. Connecting column, 10. Container platform, 11. Connecting block, 12. C-shaped fixing block, 13. Locking screw, 14. Pressure plate, 15. Test plate, 16. U-shaped heating element, 17. Thermocouple sensor, 18. Centrifugal fan, 19. Test air outlet, 20. Air outlet, 21. Sealing door, 22. Observation window, 23. Industrial camera, 24. Controller. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0024] Example 1

[0025] like Figures 1-4 As shown, the technical solution adopted by this utility model is as follows: A heat resistance performance testing device for aerospace materials includes a high-temperature furnace body 1, with an opening on the front side of the high-temperature furnace body 1 and a heat-insulating door 2 hinged thereto. The top of the high-temperature furnace body 1 is provided with a feeding port 3 and an automatic sample feeding structure 4. The automatic sample feeding structure 4 includes a lifting column 5 vertically arranged on the top of the high-temperature furnace body 1. A lifting groove is provided on one side of the lifting column 5 and a lifting screw 6 is rotatably arranged in the lifting groove. A drive motor 7 is provided on the top of the lifting column 5 and the motor power output shaft is connected to the lifting screw 6. It also includes a sealing cover 8 for sealing and matching the feeding port 3. One end of the sealing cover 8 is slidably arranged in the lifting groove and threadedly connected to the lifting screw 6. A connecting column 9 is provided at the bottom of the sealing cover 8. A holding platform 10 is magnetically connected to the bottom of the connecting column 9 for placing the material to be tested. A high-temperature resistant sealing ring is provided at the bottom of the sealing cover 8 to form a tight seal with the feeding port 3.

[0026] like Figure 4 As shown, the bottom of the holding platform 10 has a hollowed-out middle section with a connecting block 11 that is magnetically connected to the connecting column 9. The side wall of the connecting block 11 is detachably connected to a fixing component for fixing the test material. The fixing component includes a C-shaped fixing block 12 and two sets of locking screws 13 connected by threads on the side walls. The other end of the locking screw 13 is provided with a pressure plate 14. The locking screw 13 is rotatably connected to the pressure plate 14. The pressure plate 14 has a built-in pressure sensor and also includes a test plate 15 that is slidably disposed in the C-shaped fixing block 12 and is pressed and fixed by the pressure plate 14. The side wall of the connecting block 11 has a slot and a magnet inside. The C-shaped fixing block 12 is magnetically connected to the magnet. The pressure sensor built into the pressure plate 14 is a thin-film pressure sensor.

[0027] Example 2

[0028] Based on Example 1, such as Figure 3As shown, three sets of U-shaped heating elements 16 are provided on the inner rear wall and side walls of the high-temperature furnace body 1. The heating elements are silicon molybdenum rod heating elements and are fixed to the side walls by bolts. Multiple sets of thermocouple sensors 17 are also evenly distributed on both sides inside the high-temperature furnace body 1. Centrifugal fans 18 are also provided on the outer wall of the high-temperature furnace body 1. A test air vent 19 is provided on one side inside the high-temperature furnace body 1 and is connected to the centrifugal fan 18 through a high-temperature resistant pipe. An air outlet 20 is provided on the other side of the high-temperature furnace body 1, and a corresponding air outlet 20 sealing door 21 is provided to seal and insulate the air outlet 20 during static testing.

[0029] like Figure 1 As shown, the top of the high-temperature furnace body 1 is also equipped with an observation window 22 and an observation frame. An industrial camera 23 is installed at the bottom of the observation frame. Images of sample appearance changes are acquired through the observation window 22, and test data is collected in conjunction with the pressure sensor. The industrial camera 23 automatically performs white balance calibration every 60 seconds. The shooting adjustment is triggered when the temperature reaches a preset value, the pressure sensor changes abruptly, or a manual command is executed. A controller 24 is installed on the top of the high-temperature furnace body 1. Thermocouple sensor 17, heating element, drive motor 7, industrial camera 23, and pressure sensor are all electrically connected to the controller 24. The controller 24 establishes a four-dimensional database of time-temperature-pressure-image change. When the correlation between the sample deformation rate and the pressure drop rate is greater than a set value, it is determined that the material is about to fracture.

[0030] Device usage instructions

[0031] 1. Sample preparation and installation:

[0032] Carefully place the test plate 15 into the opening of the C-shaped fixing block 12 and tighten the two sets of locking screws 13 of the C-shaped fixing block 12. During tightening, the pressure plate 14 will apply pressure to the test plate 15 to press it into place. Observe carefully: the controller 24 should display the reading of the pressure sensor built into the pressure plate 14. Ensure that the applied pressure value meets the test standard requirements. Record the initial pressure value as a reference; use magnetism to magnetically attach and fix the C-shaped fixing block 12 into the slot of the connecting block 11. Ensure that the attachment is firm and there is no looseness.

[0033] Connect the display stand:

[0034] Holding the container 10 with the pre-installed fixtures and sample, align the connecting block 11 at its bottom with and bring it close to the bottom of the connecting post 9. Use magnetic attraction to firmly attach the container 10 to the bottom of the connecting post 9.

[0035] 2. Set test parameters:

[0036] On the controller 24's operating interface, set the test parameters: Target temperature: Set the highest temperature to be achieved in the test. Heating program: Set the heating rate and holding time.

[0037] Test mode:

[0038] Static test: When this mode is selected, ensure that the air outlet sealing door 21 is closed and the air outlet 20 is sealed and insulated. The centrifugal fan 18 will not start.

[0039] Dynamic Test: When this mode is selected, open the air outlet sealing door 21. Set the wind speed or air volume of the centrifugal fan 18. The fan will blow gas into the furnace through the test air outlet 19 to simulate an airflow scouring environment.

[0040] Data collection:

[0041] Set the data acquisition frequency of thermocouple sensor 17 and the data acquisition frequency of pressure sensor to monitor whether the sample deforms at high temperature, causing pressure changes. Set the photo or video recording interval of industrial camera 23 to record changes in the appearance of the sample, such as oxidation, deformation, cracking, etc.

[0042] Samples were sent in:

[0043] Ensure that the insulation door 2 is closed, start the automatic sample feeding program on the controller 24, start the drive motor 7, drive the lifting screw 6 to rotate, and the sealing cover 8, which is threadedly connected to the lifting screw 6, moves vertically downward along the lifting groove. The connecting column 9 and the holding platform 10 adsorbed on it also descend into the interior of the high-temperature furnace body 1.

[0044] 3. Start the test:

[0045] Heating and Data Recording Initiation: The heating and data recording programs are initiated on the controller 24. Three sets of U-shaped silicon molybdenum rod heating elements 16 begin operation, heating the furnace chamber according to the set temperature rise program. Thermocouple sensors 17, distributed on both sides of the furnace interior, monitor the furnace temperature in real time and feed the data back to the controller 24 for precise temperature control.

[0046] If the dynamic testing mode is selected, the centrifugal fan 18 is simultaneously started and operates according to the set airflow / speed. The pressure sensor continuously monitors the change in the clamping force of the fixed sample. The industrial camera 23 begins to capture images of the sample through the observation window 22 at set intervals.

[0047] 4. Monitoring and Adjustment:

[0048] During the test, the controller 24 displays real-time monitoring of: the comparison between the actual temperature curve inside the furnace and the set curve; the temperature uniformity inside the furnace observed from the readings of multiple thermocouples; the real-time value and variation curve of the sample clamping force; and real-time or captured images transmitted by the industrial camera 23.

[0049] In addition, the controller 24, thermocouple sensor 17, heating element, drive motor 7, industrial camera 23 and pressure sensor mentioned in this embodiment, as well as their matching power supply and control switch, are provided by the manufacturer. The circuits, electronic components and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, material, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, material, or apparatus.

[0051] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the heat resistance of aerospace materials, comprising a high-temperature furnace body (1), characterized in that: The high-temperature furnace body (1) has an opening on the front side and is hinged to a heat-insulating door (2). The top of the high-temperature furnace body (1) is provided with a feeding port (3) and an automatic sample feeding structure (4). The automatic sample feeding structure (4) includes a lifting column (5) vertically installed on the top of the high-temperature furnace body (1). The lifting column (5) has a lifting groove on one side and a lifting screw (6) is rotatably installed in the lifting groove. The top of the lifting column (5) is provided with a drive motor (7) and the motor power output shaft is connected to the lifting screw (6). It also includes a sealing cover (8) for sealing and matching the feeding port (3). One end of the sealing cover (8) is slidably installed in the lifting groove and threadedly connected to the lifting screw (6). The bottom of the sealing cover (8) is provided with a connecting column (9), and the bottom of the connecting column (9) is magnetically connected to a holding platform (10).

2. The aerospace material heat resistance testing device according to claim 1, characterized in that: The bottom of the serving platform (10) has a hollowed-out middle section with a connecting block (11) which is magnetically connected to the connecting column (9). The side wall of the connecting block (11) is detachably connected with a fixing component.

3. The aerospace material heat resistance testing device according to claim 2, characterized in that: The fastener includes a C-shaped fixing block (12) and two sets of locking screws (13) connected by threads on the sidewalls. The other end of the locking screw (13) is provided with a pressure plate (14). The locking screw (13) and the pressure plate (14) are rotatably connected. The pressure plate (14) has a built-in pressure sensor and also includes a test plate (15) that is slidably disposed in the C-shaped fixing block (12) and is pressed and fixed by the pressure plate (14). The connecting block (11) has a slot on its sidewall and a magnet inside. The C-shaped fixing block (12) is magnetically connected to the magnet.

4. The aerospace material heat resistance testing device according to claim 3, characterized in that: The high-temperature furnace body (1) is provided with three sets of U-shaped heating elements (16) on the inner rear wall and two side walls. Multiple sets of thermocouple sensors (17) are also evenly distributed on both sides inside the high-temperature furnace body (1). It also includes a centrifugal fan (18) on the outer wall of the high-temperature furnace body (1). A test air port (19) is provided on one side inside the high-temperature furnace body (1) and is connected to the centrifugal fan (18) through a high-temperature resistant pipe. An air outlet (20) is provided on the other side of the high-temperature furnace body (1), and a corresponding air outlet (20) sealing door (21) is provided.

5. The aerospace material heat resistance testing device according to claim 4, characterized in that: The top of the high-temperature furnace body (1) is also provided with an observation window (22) and an observation frame, and an industrial camera (23) is provided at the bottom of the observation frame.

6. The aerospace material heat resistance testing device according to claim 5, characterized in that: A controller (24) is provided on the top of the high-temperature furnace body (1). The thermocouple sensor (17), heating element, drive motor (7), industrial camera (23) and pressure sensor are all electrically connected to the controller (24).

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