Arc-shaped structure vacuum high and low temperature heat flow simulation system and method

Abstract

The present invention relates to the technical field of environmental simulation, and provides an arc-shaped structure vacuum high and low temperature heat flow simulation system and method. The system comprises arc infrared lamp sets, mirror heat flow reflector plates, a support frame, low-temperature rotating mechanisms, temperature acquisition probes, and a temperature measurement and control computer. The plurality of arc infrared lamp sets are mounted on the mirror heat flow reflector plates. The arc infrared lamp sets each comprises a lamp tube and insulating fasteners, the insulating fasteners are fixedly connected to the corresponding mirror heat flow reflector plate, and a bending direction of the lamp tube is the same as a radian of the arc-shaped structure. The support frame presents a frame structure, the plurality of low-temperature rotating mechanisms are fixedly mounted on the support frame, and the low-temperature rotating mechanisms are arranged in a plane parallel to a plane of the arc-shaped structure. The temperature acquisition probes are arranged on the arc-shaped structure. The temperature measurement and control computer is connected to the temperature acquisition probes and the arc infrared lamp sets. According to the system and the method, by means of the overall structure arrangement, the heating temperature uniformity of the arc-shaped structure is improved; and by means of rotation, the cooling rate is increased, and in addition, the space utilization efficiency is improved.

Description

A system and method for simulating high and low temperature heat flow in a vacuum environment with an arc structure Technical Field

[0001] The present invention relates to the technical field of spacecraft environment simulation, and in particular to a system and method for simulating high and low temperature heat flow in a vacuum arc structure. Background Art

[0002] The increasing number of special-shaped structures in spacecraft components necessitates thermal vacuum testing prior to final assembly to expose potential defects in materials and processes, eliminate premature product failures, and improve reliability. Cycling high and low temperatures in a vacuum environment is crucial for thermal vacuum testing. To realistically simulate on-orbit operation, the on-orbit heating and cooling rates and extreme temperatures must be closely replicated during testing. Infrared lamp arrays, due to their fast heating response, high heat flux density, and high cleanliness, are often used to simulate heat flux, ensuring that the structure reaches the target temperature within the specified timeframe.

[0003] In the prior art, Chinese patent CN109238763A discloses a modular infrared lamp array for spacecraft thermal testing. The infrared lamp array adopts a modular design. A large lamp array is composed of multiple interchangeable small modules, one of which is a minimum unit of the lamp array. Flexible combinations of different numbers of lamp arrays can adapt to thermal vacuum tests of solar panels of different sizes. However, this method is mainly applicable to flat heated products. For non-flat products such as curved structures, problems such as poor temperature uniformity and obvious interference in the heating zone may occur.

[0004] Chinese patent CN103538735A discloses a contoured infrared lamp array bracket, in which the bifurcation points of the six groups of movably connected support arms rotate to adjust the distance between the infrared lamps, and the sliders between the infrared lamp array body and the support frame move to adjust the relative position of the lamp array body and the support frame; however, this structure has the problem of infrared lamp array structure obstruction during the cooling process, resulting in a slow cooling rate.

[0005] Chinese patent CN103997801A discloses the application of a shaped heating plate in thermal vacuum testing of spacecraft antennas. This patent achieves heat flow simulation by making a metal heating plate with the same shape as the heated product, and increases the cooling rate by removing the shaped heating plate during the cooling process. However, the shaped heating plate has poor versatility and is only applicable to products of the same model. Removing the shaped heating plate increases the test space, resulting in poor space utilization. Technical issues

[0006] In summary, the existing technology has problems with temperature uniformity of the arc structure, as well as low cooling rate and low space utilization. Further improvements are needed to the existing simulation test equipment. Technical Solutions

[0007] In order to improve the heating uniformity during the arc-shaped structure vacuum high and low temperature heat flow simulation process, increase the cooling rate and the space utilization of the test system, the present invention provides an arc-shaped structure vacuum high and low temperature heat flow simulation system and method, and the specific technical solution is as follows.

[0008] A curved structure vacuum high and low temperature heat flow simulation system comprises an arc-shaped infrared lamp group, a mirror heat flow reflection plate, a support frame, a low-temperature rotating mechanism, a temperature acquisition probe and a temperature measurement and control computer; a plurality of the arc-shaped infrared lamp groups are mounted on the mirror heat flow reflection plate, the arc-shaped infrared lamp group comprises a lamp tube and an insulating clip, the insulating clip is fixedly connected to the mirror heat flow reflection plate, the bending direction of the lamp tube is the same as the curvature of the arc structure, the support frame is a frame structure, a plurality of the low-temperature rotating mechanisms are fixedly mounted on the support frame, the low-temperature rotating mechanism and the mounting bracket rod are arranged in a plane parallel to the arc structure; the temperature measurement and control computer is connected to the temperature acquisition probe and the arc-shaped infrared lamp group.

[0009] Preferably, the arc-shaped structure is the structure to be tested, the arc-shaped structure is placed in the supporting frame, and a plurality of temperature acquisition probes are evenly arranged on the arc-shaped structure.

[0010] Preferably, the low-temperature rotating mechanism is provided at both ends of the lamp group mounting bracket rod, and the low-temperature rotating mechanism controls the mounting bracket rod to rotate 360° along the axis, and the mirror heat flux reflection plate and the mounting bracket rod are fixedly connected by a connecting rod.

[0011] It is also preferred that the length of the connecting rod is smaller than the distance between two adjacent mounting bracket rods.

[0012] It is also preferred that the temperature measurement and control computer controls the heating power of the lamp tube, and the connecting rod and the mirror heat flux reflection plate are detachably connected.

[0013] It is also preferred that the mirror heat flux reflection plate has a plane reflection portion and a side reflection portion, the lamp tube is installed on the plane reflection portion and is configured to protrude outward along a vertical direction of a side surface of the installation side.

[0014] It is also preferred that the low-temperature rotating mechanism adjusts the arc-shaped infrared lamp group to face the normal direction of the temperature collection probe on the arc-shaped structure during heating.

[0015] A method for simulating high and low temperature heat flow in a vacuum of an arc structure utilizes the above-mentioned high and low temperature heat flow simulation system for a vacuum of an arc structure, comprising: fixing the arc structure in a support frame, installing a temperature acquisition probe on the arc structure, adjusting the arrangement position of a low-temperature rotating mechanism according to the arc structure, and controlling the low-temperature rotating mechanism to rotate the mounting bracket rod to adjust the position of the arc infrared lamp group; simulating a vacuum environment and conducting high-temperature and low-temperature cyclic change tests to test the reliability of the arc structure; and the temperature measurement and control computer processes the data collected by the temperature acquisition probe and then provides feedback to control the power of the arc infrared lamp group.

[0016] It is further preferred that during the high-temperature and low-temperature cyclic changes: during the heating process, the arc-shaped infrared lamp group and the mirror heat flux reflection plate are facing the normal direction of the temperature collection probe on the arc structure, and the arc structure evenly receives the heat flux; during the cooling process, the low-temperature rotating mechanism rotates to drive the arc-shaped infrared lamp group and the mirror heat flux reflection plate to rotate 90°. Beneficial effects

[0017] The beneficial effects of the arc-structured vacuum high and low temperature heat flow simulation system and method provided by the present invention are as follows: in this system, an arc-shaped arrangement is achieved through the cooperation of an arc-shaped infrared lamp group, a mirror heat flow reflection plate and a low-temperature rotating mechanism, thereby ensuring that the heated structure can be heated evenly; in addition, the angle of the arc-shaped infrared lamp assembly and the mirror heat flow reflection plate can be changed by rotating the low-temperature rotating mechanism, thereby improving the cooling rate; in addition, it can also effectively improve the space utilization rate of the simulation test space and reduce the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of an arc-shaped vacuum high and low temperature heat flow simulation system;

[0019] FIG2 is a schematic diagram of the installation structure of the mirror heat flux reflection plate;

[0020] FIG3 is a schematic diagram of the relative arrangement of the mirror heat flux reflection plate and the arc structure during the heating process;

[0021] FIG4 is a schematic diagram of the relative arrangement of the mirror heat flux reflection plate and the arc structure during the cooling process;

[0022] FIG5 is a schematic diagram of the installation structure of the arc infrared lamp group;

[0023] In the figure: 1-arc infrared lamp group; 2-mirror heat flux reflection plate; 3-low-temperature rotation mechanism; 4-support frame; 5-temperature acquisition probe; 6-temperature measurement and control computer; 7-arc structure; 8-mounting bracket rod; 9-lamp tube; 10-insulation buckle, 11-connecting rod. Modes for Carrying Out the Invention

[0024] 1 to 5 , a specific embodiment of a vacuum high and low temperature heat flow simulation system and method for an arc structure provided by the present invention will be described.

[0025] A curved structure vacuum high and low temperature heat flow simulation system includes an arc-shaped infrared lamp group 1, a mirror heat flow reflector 2, a support frame 4, a low-temperature rotating mechanism 3, a temperature acquisition probe 5, and a temperature measurement and control computer 6. The arc-shaped infrared lamp group can adjust the heating power, the mirror heat flow reflector improves heating efficiency, the support frame and the low-temperature rotating mechanism cooperate to adjust the installation position of the arc-shaped infrared lamp group, the temperature acquisition probe monitors the temperature, and the computer collects and records the monitoring information and controls the heating power. Multiple arc-shaped infrared lamp groups 1 are installed on the mirror heat flow reflector. The arc-shaped infrared lamp group 1 includes a lamp tube 9 and an insulating clip 10. The lamp tube 9 is fixedly installed on the mirror heat flow reflector via the insulating clip 10. The insulating clip 10 is fixedly connected to the mirror heat flow reflector 2, and the bending direction of the lamp tube is the same as the curvature of the arc structure. The support frame is a frame structure made of prefabricated profile structure. Multiple cryogenic rotating mechanisms 3 are fixedly mounted on a support frame. The cryogenic rotating mechanisms 3 and mounting bracket rods 8 are arranged in a plane parallel to the arc structure. This ensures that the matrix planar structure formed by the individual arc infrared lamp groups 1 is parallel to the arc structure plane and that heat flow is uniform when the distance between them is constant. A temperature measurement and control computer is connected to the temperature acquisition probes 5 and the arc infrared lamp groups 1.

[0026] Among them, the arc structure 7 is the structure to be tested. The size of the heated arc structure is the same as the size of the spacecraft structure. The arc structure is placed in the support frame and can be fixed to the support frame by connecting components or tooling. Multiple temperature collection probes 5 are evenly arranged on the arc structure to detect temperature changes at different positions on the arc structure.

[0027] A low-temperature rotation mechanism 3 is provided at each end of the lamp assembly mounting bracket rod. The low-temperature rotation mechanism 3 controls the mounting bracket rod to rotate 360° along its axis. The low-temperature rotation mechanism 3 can complete rotation in a high-temperature or low-temperature vacuum environment, and the rotational position of the lamp assembly mounting bracket rod can be adjusted. The mirror heat flux reflector plate 2 is fixedly connected to the mounting bracket rod 8 via a connecting rod. The connecting rod leaves a certain amount of space between the mirror heat flux reflector plate and the mounting bracket rod to maintain the relative position of each infrared lamp assembly and the distance from the heated arc structure. The length of the connecting rod is less than the distance between two adjacent mounting bracket rods, thereby ensuring rapid heat dissipation when rotating 90°.

[0028] The temperature measurement and control computer 6 controls and adjusts the heating power of the lamp tube, thereby realizing the control of the heating rate and the maximum temperature; the detachable connection between the connecting rod 11 and the mirror heat flux reflection plate 2 makes it easy to install the mirror heat flux reflection plate and perform fine adjustment to ensure that it generates heat in the same plane.

[0029] The mirror heat flux reflector 2 has a plane reflector portion and a side reflector portion. The reflector portion and the side reflector portion enclose a reflective space, which evenly reflects the heat flux of the arc infrared lamp group to the surface of the arc structure. The array structure formed by the mirror heat flux reflector 2 remains parallel to the plane of the arc structure. Under the same distance, the surface of the arc structure 7 is heated evenly. The lamp tube 9 is installed on the plane reflector portion and fixed in the middle of the plane reflector portion. The lamp tube 9 is configured to protrude outward along the vertical direction of the side surface of the installation side. The lamp tube 9 is fixed to the mirror heat flux reflector in a roughly parallel manner by an insulating clip. The middle of the lamp tube 9 is the longest distance from the mirror heat flux reflector, and the distance gradually decreases from the middle of the lamp tube 9 to the two ends of the lamp tube. The low-temperature rotating mechanism 3 adjusts the normal direction of the arc infrared lamp group to the temperature acquisition probe on the arc structure when heating, thereby more accurately detecting the temperature.

[0030] A method for simulating high and low temperature heat flow in a vacuum arc structure utilizes the aforementioned arc structure high and low temperature heat flow simulation system. The simulation process includes: securing the arc structure within a support frame, installing a temperature acquisition probe on the arc structure, adjusting the layout of a low-temperature rotating mechanism according to the arc structure, and controlling the low-temperature rotating mechanism to rotate the mounting bracket rod to adjust the position of the arc infrared lamp assembly; simulating a vacuum environment and operating the arc structure in a vacuum environment to conduct high and low temperature cycling tests to test the reliability of the arc structure; and processing the data collected by the temperature acquisition probe using a temperature measurement and control computer to provide feedback control of the power of the arc infrared lamp assembly. During the high and low temperature cycling process: during the heating process, the arc infrared lamp assembly and the mirror heat flux reflector face the normal direction of the temperature acquisition probe on the arc structure, so that the arc structure receives heat flow evenly. During the cooling process, the low-temperature rotating mechanism rotates, causing the arc infrared lamp assembly and the mirror heat flux reflector to rotate 90 degrees.

[0031] In this system, an arc-shaped arrangement is achieved through the coordination of an arc-shaped infrared lamp assembly, a mirror-shaped heat flux reflection plate, and a low-temperature rotating mechanism, ensuring that the heated structure can be heated evenly. In addition, the low-temperature rotating mechanism can be rotated to change the angle of the arc-shaped infrared lamp assembly and the mirror-shaped heat flux reflection plate, thereby increasing the cooling rate. In addition, it can also effectively improve the space utilization of the simulation test space and reduce the test cost.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An arc-shaped vacuum high and low temperature heat flow simulation system, characterized in that: It includes an arc infrared lamp group, a mirror heat flux reflection plate, a support frame, a low-temperature rotating mechanism, a temperature acquisition probe and a temperature measurement and control computer; a plurality of the arc infrared lamp groups are installed on the mirror heat flux reflection plate, the arc infrared lamp group includes a lamp tube and an insulating clip, the insulating clip is fixedly connected to the mirror heat flux reflection plate, the bending direction of the lamp tube is the same as the curvature of the arc structure, the support frame is a frame structure, a plurality of the low-temperature rotating mechanisms are fixedly installed on the support frame, the low-temperature rotating mechanism and the mounting bracket rod are arranged in a plane parallel to the arc structure; the temperature measurement and control computer is connected to the temperature acquisition probe and the arc infrared lamp group.

2. The arc-shaped structure vacuum high and low temperature thermal flow simulation system according to claim 1, characterized in that: The arc structure is a structure to be tested, the arc structure is placed in a supporting frame, and a plurality of temperature collection probes are evenly arranged on the arc structure.

3. The arc-shaped structure vacuum high and low temperature thermal flow simulation system according to claim 1, characterized in that: The low-temperature rotating mechanism is arranged at both ends of the lamp group mounting bracket rod, and the low-temperature rotating mechanism controls the mounting bracket rod to rotate 360 ​​degrees along the axis. The mirror heat flux reflection plate and the mounting bracket rod are fixedly connected by a connecting rod.

4. The arc-shaped structure vacuum high and low temperature thermal flow simulation system according to claim 3, characterized in that: The length of the connecting rod is smaller than the distance between two adjacent mounting bracket rods.

5. The arc-shaped structure vacuum high and low temperature thermal flow simulation system according to claim 3, characterized in that: The temperature measuring and controlling computer controls the heating power of the lamp tube, and the connecting rod is detachably connected to the mirror heat flux reflecting plate.

6. The arc-shaped structure vacuum high and low temperature thermal flow simulation system according to claim 1, characterized in that: The mirror heat flux reflection plate has a plane reflection part and a side reflection part. The lamp tube is installed on the plane reflection part and is configured to protrude outward along the vertical direction of the side surface of the installation side.

7. The arc-shaped structure vacuum high and low temperature thermal flow simulation system according to claim 1, characterized in that: The low-temperature rotating mechanism adjusts the arc-shaped infrared lamp group to face the normal direction of the temperature collection probe on the arc-shaped structure during heating.

8. A method for simulating high and low temperature heat flow in a vacuum of an arc structure, using a system for simulating high and low temperature heat flow in a vacuum of an arc structure as claimed in any one of claims 1 to 7, characterized in that: include: The arc structure is fixed in a supporting frame, and a temperature acquisition probe is installed on the arc structure. The arrangement position of the low-temperature rotating mechanism is adjusted according to the arc structure. The low-temperature rotating mechanism controls the mounting bracket rod to rotate and adjust the position of the arc infrared lamp group. A vacuum environment is simulated to conduct high-temperature and low-temperature cycle change tests to test the reliability of the arc structure. After the temperature measurement and control computer processes the data collected by the temperature acquisition probe, it feeds back to control the power of the arc infrared lamp group.

9. A method for simulating high and low temperature heat flow in a vacuum of an arc structure according to claim 8, characterized in that: During the high-temperature and low-temperature cyclic change process: during the heating process, the arc-shaped infrared lamp group and the mirror heat flux reflection plate are facing the normal direction of the temperature collection probe on the arc structure, and the arc structure evenly receives the heat flux; during the cooling process, the low-temperature rotating mechanism rotates to drive the arc-shaped infrared lamp group and the mirror heat flux reflection plate to rotate 90°.

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