An automated radiation heating test system

Abstract

The present application belongs to the field of thermal test technology, and particularly relates to an automated radiation heating test system, which mainly includes: a load-bearing wall, on which a linear module extending in a vertical direction is arranged; a heater bracket, which is arranged on the linear module and can move up and down in a vertical direction on the linear module; a radiation heater, which is fixed on the heater bracket, and the radiation heater includes a heater base, on which a slide rail extending in a horizontal direction is provided, and a plurality of mobile units that can move on the slide rail are controllably arranged on the heater base, and a lamp tube clamp is arranged at the end of each mobile unit, and the lamp tube clamp is used to clamp a quartz lamp tube; a heat-insulating felt, which is fixed on a side surface of the load-bearing wall where the linear module is installed, and the heat-insulating felt has a fixed end for fixing the test piece; and a control system, which is electrically connected to the linear module and the mobile unit. The present application can dynamically adjust the position of the temperature control point, reduce the test cost, and speed up the test cycle.

Description

Technical Field

[0001] The present application belongs to the field of thermal testing technology, and in particular relates to an automated radiation heating testing system. Background Art

[0002] With the development of aerospace technology, the flight speed of aircraft is getting faster and faster. During the flight, the aircraft will be subjected to aerodynamic heating, which will reduce the structural strength and stiffness of the aircraft. In order to verify the strength performance of the aircraft under thermal load, structural thermal tests need to be carried out.

[0003] Quartz lamp radiation heating system is usually used as a heating method in structural thermal tests. Quartz lamp heating is simple, and the loadable temperature is high and the heat flow is large. In most thermal tests, not only is the highest temperature of the structure required to be loaded to the target temperature, but the heated surface of the test piece is also required to meet a certain temperature field distribution form, which puts higher requirements on the design of heating tests and quartz lamp radiation heating systems. In this case, thermal radiation simulation analysis can be used before the test to carry out scheme design, and a structural thermal test that meets the temperature loading requirements and temperature field distribution requirements can be designed. However, this method also has several limitations:

[0004] 1) Due to the accuracy of the thermal radiation algorithm, after the heating scheme is designed, it is usually necessary to carry out a debugging test to verify and correct the heating scheme, and the determined heating scheme is fixed in the test, that is, the relative position between the radiation heater and the test piece and the arrangement between the quartz lamps cannot be adjusted during the test;

[0005] 2) According to different test requirements, thermal radiation simulation analysis needs to be carried out again before each test, which increases manpower and material costs and increases the test cycle;

[0006] 3) For some structural thermal tests, during the temperature loading process, the structure will produce a large deformation. When the structural appearance changes greatly, the relative position between the structure and the quartz lamp radiation heater will be significantly changed, thereby changing the temperature field distribution of the test piece, which cannot meet the requirements of the temperature field distribution; and the change in the temperature field distribution may change the position of the highest temperature point in the heated surface. In the test, a temperature sensor is usually installed at the highest temperature point and used as the temperature control point. Therefore, when the position of the highest temperature point changes, the temperature controlled by the control program is not the highest temperature. Not only is the control effect unsatisfactory, but the actual highest temperature point temperature may also exceed the test target temperature by a large amount, causing damage to the test piece and affecting the test. Summary of the invention

[0007] In order to solve the above problems, the present application provides an automated radiation heating test system, which realizes automatic dynamic adjustment of the radiation heater in the structural thermal test and meets the test heating requirements. The system mainly includes:

[0008] A load-bearing wall, on which a linear module extending in a vertical direction is arranged;

[0009] A heater bracket, disposed on the linear module and capable of moving up and down along a vertical direction on the linear module;

[0010] A radiation heater is fixed on the heater bracket, the radiation heater comprises a heater base, the heater base has a slide rail extending in the horizontal direction, a plurality of movable units capable of moving on the slide rail are controllably arranged on the heater base, a lamp tube clamp is arranged at the end of each movable unit, and the lamp tube clamp is used to clamp a quartz lamp tube;

[0011] A heat-insulating felt is fixed on one side of the load-bearing wall where the linear module is installed, and the heat-insulating felt has a fixed end for fixing the test piece;

[0012] The control system is electrically connected to the linear module and the moving unit.

[0013] Preferably, the heater base is fixed to the heater bracket by a threaded rod.

[0014] Preferably, it further comprises a non-contact temperature measuring instrument electrically connected to the control system, wherein the non-contact temperature measuring instrument is configured to monitor the temperature field distribution of the test piece.

[0015] Preferably, a heat insulation board is further provided on the heater base, and the heat insulation board is provided on a side of the quartz lamp tube facing away from the test piece.

[0016] Preferably, passages are provided on the threaded rod and the heater bracket, and the threaded rod is connected with the passages of the heater bracket to form a water circulation passage, and the water circulation passage is connected to a water cooling device.

[0017] Preferably, the thermal insulation felt is fixed to the load-bearing wall by bolts and has a double-ear structure, and the test piece is correspondingly provided with a single-ear piece fixed to the thermal insulation felt.

[0018] This application combines a quartz lamp radiation heating system and an automated control device to quickly provide a heating plan before the test. During the test, the design parameters of the heating plan can be dynamically adjusted according to the test results, and the position of the temperature control point can be dynamically adjusted to ensure that the temperature of the temperature control point is always the highest temperature value. This application can quickly provide a test plan, reduce test costs, and speed up the test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the automated radiation heating test system of the present application.

[0020] Figure 2 This application Figure 1 Assembly drawing of the load-bearing wall of the illustrated embodiment.

[0021] Figure 3 This application Figure 1 A schematic diagram of the installation of the linear module of the illustrated embodiment.

[0022] Figure 4 This application Figure 1 A schematic structural diagram of a radiant heater according to the illustrated embodiment.

[0023] Figure 5 This application Figure 1 Schematic diagram of the transmission structure of the embodiment shown.

[0024] Figure 6 This application Figure 1 Schematic diagram of the installation of the heat insulation board of the illustrated embodiment.

[0025] Figure 7 This application Figure 1 Schematic diagram of the installation of thermal insulation felt in the illustrated embodiment.

[0026] Among them, 1-load-bearing wall, 2-linear module, 3-radiant heater, 4-transmission device, 5-connecting rod, 6-insulation board, 7-insulation cotton felt, 8-test piece, 9-non-contact temperature meter, 10-control system, 11-clamping device, 12-ear piece, 13-heater bracket, 14-threaded rod, 15-quartz lamp tube, 16-heater base, 17-lamp tube clamp, 18-lamp tube mounting groove, 19-moving unit. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0028] like Figure 1-Figure 7 As shown, the automated radiation heating test system of the present application mainly includes:

[0029] A load-bearing wall 1, on which a linear module 2 extending in a vertical direction is arranged;

[0030] A heater support 13, which is disposed on the linear module 2 and can move up and down along the vertical direction on the linear module 2;

[0031] The radiation heater 3 is fixed on the heater support 13. The radiation heater 3 includes a heater base 16. The heater base 16 has a slide rail extending in the horizontal direction. A plurality of movable units 19 capable of moving on the slide rail are controllably arranged on the heater base 16. A lamp tube clamp 17 is arranged at the end of each movable unit 19. The lamp tube clamp 17 is used to clamp the quartz lamp tube 15.

[0032] A heat-insulating felt 7 is fixed on a side surface of the load-bearing wall 1 where the linear module 2 is installed, and the heat-insulating felt 7 has a fixed end for fixing a test piece 8;

[0033] The control system 10 is electrically connected to the linear module 2 and the moving unit 19 .

[0034] In some optional embodiments, such as Figure 2 As shown, the bottom of the load-bearing wall 1 is screwed and fixed on the ground rail, and two clamping devices 11 on one side of the load-bearing wall 1 use bolts to connect the ears 12 of the test piece to fix the test piece 8, and two linear modules 2 are installed on the same side surface of the load-bearing wall 1, and the two linear modules 2 are in parallel directions.

[0035] In some optional embodiments, the heater base 16 is fixed to the heater bracket 13 via a threaded rod 14 .

[0036] In some optional embodiments, a non-contact temperature measuring instrument 9 is further included, which is electrically connected to the control system 10 , and the non-contact temperature measuring instrument 9 is configured to monitor the temperature field distribution of the test piece 8 .

[0037] like Figure 3 As shown, the linear module 2 is fixedly installed on the load-bearing wall 1, and it adopts a motor ( Figure 1 The linear module 2 is driven by a heater bracket 13, which is screwed to the threaded rod 14 of the radiation heater 3. The linear module 2 is connected to the control system 10 by wires. During the test, the hot surface temperature field of the test piece 8 is dynamically collected by the non-contact temperature measuring instrument 9 and fed back to the control system 10 in real time. The control system 10 compares the temperature field distribution at the current moment with the target temperature distribution. When the difference between the two is large, the control system 10 controls the vertical direction of the linear module 2 to control the vertical distance between the radiation heater 3 and the test piece 8, thereby changing the surface temperature distribution of the test piece 8.

[0038] In some optional implementations, a heat insulation board 6 is further disposed on the heater base 16 , and the heat insulation board 6 is disposed on a side of the quartz lamp tube 15 facing away from the test piece 8 .

[0039] like Figure 4 As shown, the radiation heater 3 is mainly composed of a threaded rod 14 , a quartz lamp tube 15 , a heater base 16 , and a lamp tube clamp 17 .

[0040] Half of the inner surface of the quartz glass of the quartz lamp tube 15 is a reflective layer of a high reflectivity material coating, and the other half is a transparent layer. During the test installation process, the reflective layer side of the quartz lamp tube 15 needs to face the test piece 8, so that most of the heat radiation away from the test piece is reflected back to the test piece through the reflective layer, thereby improving the heat radiation efficiency of the quartz lamp tube 15. The quartz lamp tube 15 is installed in the lamp tube installation groove 18 of the heater base 16 through the lamp tube clamp 17, as shown in FIG. Figure 5 As shown, the lamp tube clamp 17 is connected to the mobile unit 19 of the transmission device 4 through the connecting rod 5, and the transmission device 4 is electrically connected to the control system 10. During the test, the hot surface temperature field and extreme temperature information of the test piece 8 are dynamically collected by the non-contact thermometer 9, and are fed back to the control system 10 in real time. The control system 10 compares the temperature field distribution and the target temperature distribution at the current moment. When the difference between the two is small, the mobile unit 19 of the transmission device 4 is controlled by the control system 10. By adjusting the position of each mobile unit 19 on the transmission device 4, the position of the lamp tube clamp 17 on the lamp tube mounting groove 18 is adjusted through the connecting rod 5, so as to change the arrangement of the quartz lamp tube 15, thereby changing the temperature field distribution of the test piece 8.

[0041] In some optional embodiments, the threaded rod 14 and the heater bracket 13 are provided with passages, and the threaded rod 14 is connected to the passages of the heater bracket 13 to form a water circulation passage, and the water circulation passage is connected to a water cooling device. In this embodiment, a heat insulation board 6 of a certain thickness is installed on the surface of the heater base 16 facing the quartz lamp tube to prevent the high temperature from affecting the heater base 16 and other test equipment. In addition, the heater base 16 has a cylindrical cavity inside, which is connected to the water cooling device through the threaded rod 14 to form a cooling water circulation, and the heater base 16 and the lamp clamp 17 are cooled, so that the radiation heater 3 can work normally.

[0042] In the present application, the heat insulation board 6 is composed of heat insulation materials, such as Figure 6 As shown, it is installed on the heater base 16 of the radiation heater 3. It has two main functions. One is to hinder the heat exchange between the external environment and the test piece 8, improve the thermal efficiency of the radiation heater 3, and improve the temperature control accuracy of the test piece 8; the other is to prevent the radiation heater 3 from affecting the high temperature of the equipment in the area around the test piece 8, so as to avoid the equipment being unable to be used.

[0043] In some optional embodiments, the heat insulating felt 7 is fixed to the load-bearing wall 1 by bolts and has a double-ear structure, and the test piece 8 is correspondingly provided with a single-ear piece 12 fixed to the heat insulating felt 7. Figure 7 As shown, the heat-insulating felt 7 is made of heat-insulating material and is fixed on the heated surface of the clamping device 11 of the load-bearing wall 1 by bolts, so as to protect the clamping device 11 and the ear piece 12 of the test piece 8 from deformation and damage caused by high temperature during the heating process.

[0044] In the present application, the test piece 8 is composed of a test area and an ear piece 12 , and the ear piece 12 is screwed and installed with a clamping device 11 of the load-bearing wall 1 .

[0045] In the present application, the non-contact thermometer 9 is a non-contact temperature measuring instrument based on infrared waves. During the test, the viewing angle is adjusted to ensure that the entire area of ​​the hot surface of the test piece 8 can be observed, and the material incidence and temperature correlation of the test piece 8 are set. The non-contact thermometer 9 is connected to the control system 10. During the test, the non-contact thermometer 9 transmits the measured temperature field distribution, the highest temperature value and the occurrence position of the hot surface of the test piece 8 to the control system 10, and the control system 10 compares and analyzes the results.

[0046] In the present application, the control system 10 includes thermal radiation analysis software and control hardware modules. Before the test is carried out, a preliminary thermal radiation scheme is first given by the internal thermal radiation analysis software, and the linear module 2 and the transmission device 4 are controlled according to the heating scheme to change the relative position relationship between the radiation heater 3 and the test piece 8 and the arrangement between the quartz lamps 15. During the test, the non-contact thermometer 9 measures the extreme temperature and temperature field distribution of the hot surface of the test piece 8, and feeds the results back to the control system 10. When the extreme temperature does not reach the target temperature, the control system 10 controls the power output of the radiation heater 3 through the power control cabinet (not shown in the figure), changes the output radiation heat flow of the quartz lamp 15, and then changes the extreme temperature of the test piece 8; when the temperature distribution does not meet the test requirements, when the result is significantly different from the target, the overall relative position of the radiation heater 3 and the test piece 8 is adjusted by controlling the linear module 2; when the result is slightly different from the target, the arrangement of the quartz lamp 15 is adjusted by controlling the transmission device 4. Finally, the temperature distribution and extreme temperature of the test piece 8 are changed. In addition, during the test, the control system 10 can dynamically adjust the position of the temperature control point in real time through the maximum temperature value and the position of occurrence fed back by the non-contact thermometer 9 to ensure that the temperature of the temperature control point is always the maximum temperature value, thereby preventing overheating of the test, causing damage to the test piece and test accidents.

[0047] The present invention combines a quartz lamp radiation heating system and an automatic control device to quickly provide a heating plan before the test. During the test, the design parameters of the heating plan can be dynamically adjusted according to the test results, and the position of the temperature control point can be dynamically adjusted to ensure that the temperature of the temperature control point is always the highest temperature value. The invention can quickly provide a test plan, reduce test costs, and speed up the test cycle.

[0048] The present invention can be applied to conventional structural thermal tests of aircraft, and can also be applied to related thermal tests in which the structure produces large deformation under thermal action. The concept of the invention can also be used in the design of other test equipment, especially those with obvious dynamic characteristics.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An automated radiation heating test system, characterized in that: include: A load-bearing wall (1) on which a linear module (2) extending in a vertical direction is arranged; A heater support (13) is arranged on the linear module (2) and is capable of moving up and down in a vertical direction on the linear module (2); A radiation heater (3) is fixed on the heater support (13), the radiation heater (3) comprises a heater base (16), the heater base (16) has a slide rail extending in a horizontal direction, a plurality of movable units (19) capable of moving on the slide rail are controllably arranged on the heater base (16), a lamp tube clamp (17) is arranged at the end of each movable unit (19), and the lamp tube clamp (17) is used to clamp the quartz lamp tube (15); A heat-insulating felt (7) is fixed to a side surface of the load-bearing wall (1) on which the linear module (2) is installed, and the heat-insulating felt (7) has a fixed end for fixing the test piece (8); A control system (10) electrically connected to the linear module (2) and the moving unit (19); A non-contact temperature measuring instrument (9), electrically connected to the control system (10), wherein the non-contact temperature measuring instrument (9) is configured to monitor the temperature field distribution of the test piece (8); During the test, the hot surface temperature field of the test piece (8) is dynamically collected by the non-contact temperature measuring instrument (9) and fed back to the control system (10) in real time. The control system (10) compares the temperature field distribution at the current moment with the target temperature distribution. On the one hand, the control system (10) controls the vertical direction of the linear module (2) to control the vertical distance between the radiation heater (3) and the test piece (8), thereby changing the surface temperature distribution of the test piece (8). On the other hand, the control system (10) controls the moving unit (19) to adjust the position of each moving unit (19), thereby driving the position adjustment of the lamp tube clamp (17) on the lamp tube installation groove (18), changing the arrangement of the quartz lamp tube (15), and thus changing the temperature field distribution of the test piece (8).

2. The automated radiant heating test system according to claim 1, characterized in that: The heater base (16) is fixed to the heater bracket (13) via a threaded rod (14).

3. The automated radiant heating test system according to claim 1, characterized in that: A heat insulation board (6) is also provided on the heater base (16), and the heat insulation board (6) is provided on a side of the quartz lamp tube (15) facing away from the test piece (8).

4. The automated radiant heating test system according to claim 2, wherein: A passage is provided on the threaded rod (14) and the heater bracket (13), and the threaded rod (14) is connected to the passage of the heater bracket (13) to form a water circulation passage, and the water circulation passage is connected to a water cooling device.

5. The automated radiant heating test system according to claim 1, wherein: The heat-insulating felt (7) is fixed to the load-bearing wall (1) by means of bolts and has a double-ear structure, and the test piece (8) is correspondingly provided with a single-ear piece (12) fixed to the heat-insulating felt (7).

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