A temperature shock and hot vacuum test integrated device

Abstract

The utility model discloses a temperature impact and hot vacuum test integrated equipment, including the vacuum chamber and sealing cover plate of being equipped with vacuum channel, wherein, the vacuum chamber is equipped with respectively and is sealed interval arrangement heating sub -chamber and refrigeration sub -chamber, the positioning transplant module of measured workpiece is still equipped with in the vacuum chamber, is used for installing positioning measured workpiece, and realizes the displacement switching of measured workpiece between heating sub -chamber and refrigeration sub -chamber simultaneously, the utility model discloses can provide hot vacuum test condition and temperature impact test condition simultaneously, has greatly reduced the period of measured workpiece to carry out temperature impact test and hot vacuum test, and has reduced the installation positioning error of measured workpiece in the test installation process, has effectively protected measured workpiece, is very suitable for being used in the temperature impact test and hot vacuum test in spaceflight material and spare part (for example space photovoltaic module) reliability test.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, specifically to an integrated device for temperature shock and thermal vacuum testing. Background Technology

[0002] In existing testing equipment, when facing the reliability testing requirements of aerospace materials and components (such as space photovoltaic modules), the workpiece to be tested needs to be sent into traditional temperature shock test chambers and thermal vacuum test equipment to conduct temperature shock and thermal shock tests respectively. This results in the workpiece to be tested needing to be repeatedly disassembled and repositioned, causing the cumulative test installation and positioning error of the workpiece to reach more than ±1.5mm, and the test cycle is extended by at least 40%.

[0003] Therefore, the applicant wishes to seek technical solutions to address the above-mentioned technical problems. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide an integrated temperature shock and thermal vacuum testing device that can simultaneously provide thermal vacuum testing conditions and temperature shock testing conditions, greatly reducing the cycle of temperature shock testing and thermal vacuum testing of the workpiece under test, and reducing the installation and positioning error of the workpiece under test during the test installation process, effectively protecting the workpiece under test. It is very suitable for temperature shock testing and thermal vacuum testing in the reliability testing of aerospace materials and components (such as space photovoltaic modules).

[0005] The technical solution adopted in this utility model is as follows:

[0006] An integrated device for temperature shock and thermal vacuum testing includes a vacuum chamber with a vacuum extraction channel and a sealing cover; wherein,

[0007] The vacuum chamber is provided with a heating sub-chamber and a cooling sub-chamber that are arranged in a sealed interval;

[0008] The vacuum chamber is also equipped with a positioning and transfer module for the workpiece under test, which is used to install and position the workpiece under test, and at the same time realize the displacement switching of the workpiece under test between the heating sub-chamber and the cooling sub-chamber.

[0009] Preferably, the positioning and transfer module includes a workpiece mounting tray; wherein the workpiece mounting tray is mounted on a displacement driving unit, and the displacement of the workpiece mounting tray between the heating sub-chamber and the cooling sub-chamber is achieved by the driving displacement of the displacement driving unit.

[0010] Preferably, the heating sub-chamber and the cooling sub-chamber are spaced apart in the Z-axis direction; wherein, the displacement driving unit includes an X-axis or Y-axis propulsion driving unit and a Z-axis displacement driving unit, the workpiece mounting tray is mounted on the X-axis or Y-axis propulsion driving unit, and the X-axis or Y-axis propulsion driving unit is mounted on the Z-axis displacement driving unit.

[0011] Preferably, the X-axis or Y-axis propulsion drive unit includes a lead screw rotatably mounted on the propulsion base plate, and a first drive motor for driving the lead screw. The workpiece mounting tray is connected to the lead screw via a lead screw nut. The Z-axis displacement drive unit includes a Z-axis lead screw rotatably mounted on the mounting bracket, and a second drive motor for driving the Z-axis lead screw. The propulsion base plate is connected to the Z-axis lead screw via a Z-axis lead screw nut.

[0012] Preferably, the heating sub-chamber is provided with a hot cavity inlet and outlet, and a heating plate is arranged inside it; wherein preferably, the heating sub-chamber is provided with multiple heating plate area configuration layers arranged at intervals, each heating plate area configuration layer is connected to the hot cavity inlet and outlet, and each heating plate area configuration layer is provided with one or more heating plates.

[0013] Preferably, the heating plate is an alumina ceramic heating plate, wherein each heating plate is equipped with a thermocouple.

[0014] Preferably, the refrigeration sub-chamber is provided with a cold cavity inlet / outlet and is equipped with a refrigeration plate inside; wherein preferably, the interior of the refrigeration sub-chamber is provided with multiple refrigeration plate area configuration layers distributed at intervals, each refrigeration plate area configuration layer is connected to the cold cavity inlet / outlet, and each refrigeration plate area configuration layer is equipped with a refrigeration plate.

[0015] Preferably, the cooling plate has a serpentine cooling channel, the inlet and outlet of which are connected to a liquid nitrogen supply tank and a liquid nitrogen recovery tank, respectively; wherein, the surface of the cooling plate is provided with heating wires and a temperature sensor is installed.

[0016] Preferably, the cooling channels of the cooling plates in the adjacent cooling plate area configuration layer are connected in series; the inlet of the cooling channel of the cooling plate in the adjacent cooling plate area configuration layer at the first end is connected to a liquid nitrogen supply tank, and the outlet of the cooling channel of the cooling plate in the adjacent cooling plate area configuration layer at the last end is connected to a liquid nitrogen recovery tank; wherein, preferably, a serpentine slot is made on the cooling plate, and a liquid nitrogen pipe is set in the slot to form the cooling channel.

[0017] Preferably, the liquid nitrogen supply tank and the liquid nitrogen recovery tank are each provided with a compressed air inlet, and the liquid nitrogen recovery tank is provided with a pressure relief port; preferably, the liquid nitrogen recovery tank is also connected to a spare liquid nitrogen recovery tank, and the liquid nitrogen recovery tank is provided with a compressed air inlet and a pressure relief port.

[0018] This invention proposes to further incorporate a heating sub-chamber and a cooling sub-chamber arranged in a sealed interval within a vacuum chamber. Through a positioning and transfer module for the workpiece under test, the displacement of the workpiece between the heating and cooling sub-chambers can be switched. This allows for the simultaneous provision of thermal vacuum test conditions and temperature shock test conditions, significantly reducing the cycle time for temperature shock and thermal vacuum tests on the workpiece. Furthermore, the workpiece does not require repeated disassembly and repositioning during the test, minimizing installation and positioning errors and effectively protecting the workpiece. This invention is highly suitable for temperature shock and thermal vacuum tests in the reliability testing of aerospace materials and components (such as space photovoltaic modules). Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the integrated temperature shock and thermal vacuum testing equipment according to a specific embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the vacuum chamber structure (with perspective effect) according to a specific embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the positioning and transplanting module according to a specific embodiment of this application;

[0022] Figure 4 This is a schematic diagram (with perspective effect) of the structure of the heating sub-chamber according to a specific embodiment of this application;

[0023] Figure 5 This is a schematic diagram (with perspective effect) of the structure of the refrigeration sub-chamber according to a specific embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the structure of the cooling plate according to a specific embodiment of this application;

[0025] Figure 7 It is Figure 6 A schematic diagram of the structure after flipping. Detailed Implementation

[0026] This embodiment proposes an integrated device for temperature shock and thermal vacuum testing, including a vacuum chamber with a vacuum extraction channel and a sealing cover plate; wherein, the vacuum chamber is provided with a heating sub-chamber and a cooling sub-chamber arranged in a sealed interval; the vacuum chamber is also provided with a positioning and transfer module for the workpiece under test, which is used to install and position the workpiece under test, and at the same time realize the displacement switching of the workpiece under test between the heating sub-chamber and the cooling sub-chamber.

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] Please refer to the above. Figure 1 and Figure 2 As shown, an integrated device for temperature shock and thermal vacuum testing includes a vacuum chamber 100 with a vacuum extraction channel and a sealing cover plate 200. The vacuum chamber 100 contains a heating sub-chamber 110 and a cooling sub-chamber 120 arranged at sealed intervals. The vacuum chamber 100 also contains a positioning and transfer module 130 for the workpiece under test, used to install and position the workpiece (not shown, for example, a photovoltaic module), while simultaneously enabling the workpiece to switch between the heating sub-chamber 110 and the cooling sub-chamber 120.

[0029] Preferably, in this embodiment, the sealing cover 200 adopts a flip-top design, which facilitates the handling of the workpiece to be tested. Specifically, it is made of 316L stainless steel. A silicone sealing strip is used between the sealing cover 200 and the vacuum chamber 100 to ensure vacuum pressure conditions.

[0030] Please refer to the above for further details. Figure 3 As shown, preferably, in this embodiment, the positioning and transfer module 130 includes a workpiece mounting tray 131; wherein, the workpiece mounting tray 131 is mounted on the displacement driving unit, and the displacement of the workpiece mounting tray 131 between the heating sub-chamber 110 and the cooling sub-chamber 120 is realized by the driving displacement of the displacement driving unit; the workpiece mounting tray 130 can be set according to the size information of the workpiece to be tested, realizing large-size aerospace components, breaking through the upper limit of the test volume of the mainstream test equipment in the prior art.

[0031] Preferably, in this embodiment, the heating sub-chamber 110 and the cooling sub-chamber 120 are spaced apart in the Z-axis direction; wherein, the displacement drive unit includes an X-axis or Y-axis propulsion drive unit and a Z-axis displacement drive unit, the workpiece mounting tray is mounted on the X-axis or Y-axis propulsion drive unit, and the X-axis or Y-axis propulsion drive unit is mounted on the Z-axis displacement drive unit. In actual implementation, those skilled in the art can use conventional technical means to select appropriate X-axis or Y-axis propulsion drive units and Z-axis displacement drive units, such as using a motor-screw-nut threaded drive structure or a cylinder drive structure. This application does not make any special limitation in this regard during implementation.

[0032] Further preferably, in this embodiment, the X-axis or Y-axis propulsion drive unit includes a propulsion screw 132 rotatably mounted (specifically via a bearing housing) on ​​the propulsion base plate 133, and a first drive motor (not shown in the figure, known structure) for driving the propulsion screw 132. The workpiece mounting tray 131 is connected to the propulsion screw 132 via a propulsion nut (sleeved on the propulsion screw). The Z-axis displacement drive unit includes a Z-axis screw 134 rotatably mounted (specifically via a bearing housing) on ​​the mounting frame 135, and a second drive motor (not shown in the figure, known structure) for driving the Z-axis screw 134. The propulsion base plate 133 is connected to the Z-axis screw 134 via a Z-axis nut (sleeved on the Z-axis screw).

[0033] Specifically, in this embodiment, a Y-axis propulsion drive unit is used; the first and second drive motors are servo motors, which can be installed inside the vacuum chamber 100, specifically vacuum servo motors; alternatively, they can be installed outside the vacuum chamber 100 and then sealed and connected via magnetohydrodynamics; wherein, the repeatability of the Y-axis and Z-axis is ≤0.05mm, and the workpiece mounting tray is made of alloy with a coefficient of thermal expansion ≤1.2×10⁻ 6 / ℃.

[0034] Please refer to the above for further details. Figure 4 As shown, preferably, in this embodiment, the heating sub-chamber 110 is provided with a hot chamber inlet / outlet 111, and a heating plate is disposed inside it; wherein preferably, the interior of the heating sub-chamber 110 is provided with multiple heating plate area configuration layers arranged at intervals ( Figure 4 The diagram shows an upper heating plate area configuration layer 112 and a lower heating plate area configuration layer 113. Each heating plate area configuration layer 112 and 113 is connected to the hot cavity inlet / outlet 111, and each heating plate area configuration layer 112 and 113 is provided with multiple heating plates.

[0035] More preferably, in this embodiment, the heating plate is an alumina ceramic heating plate, wherein each heating plate is equipped with a thermocouple; specifically preferably, in this embodiment, the heating sub-chamber 110 is equipped with a total of 14 sets of alumina ceramic heating plates, each heating plate integrating 4 K-type thermocouples, and the heating power density reaches 8W / cm².

[0036] Please refer to the above for further details. Figure 5 , Figure 6 and Figure 7 As shown, preferably, in this embodiment, the refrigeration sub-chamber 120 is provided with a cold chamber inlet / outlet 121, and a refrigeration plate is disposed inside it; wherein preferably, the interior of the refrigeration sub-chamber 120 is provided with multiple refrigeration plate area configuration layers arranged at intervals ( Figure 5 The upper cooling plate area configuration layer 122 and the lower cooling plate area configuration layer 123 are shown. Each cooling plate area configuration layer 122 and 123 is connected to the cold cavity inlet / outlet 121, and each cooling plate area configuration layer 122 and 123 is respectively configured with a cooling plate 124.

[0037] More preferably, in this embodiment, the cooling plate 124 is provided with a serpentine cooling channel, the inlet and outlet of which are connected to a liquid nitrogen supply tank and a liquid nitrogen recovery tank, respectively; wherein, the surface of the cooling plate is provided with heating wires and a temperature sensor is installed; the cooling channels of the cooling plates in the adjacent cooling plate area configuration layer are connected in series; the inlet of the cooling channel of the cooling plate in the adjacent cooling plate area configuration layer at the first end is connected to the liquid nitrogen supply tank, and the outlet of the cooling channel of the cooling plate in the adjacent cooling plate area configuration layer at the last end is connected to the liquid nitrogen recovery tank; wherein, preferably, a serpentine slot 124a is made on the cooling plate 124, and a liquid nitrogen pipe 124b is provided in the slot to form a cooling channel, which can significantly improve the heat exchange efficiency of the cooling sub-chamber 120;

[0038] Preferably, in this embodiment, the cooling plate 124 is made of copper plate, the groove 124a has a groove depth of 2.0±0.05mm, a groove width of 6.0mm, and a groove spacing of 4.5mm, and a built-in Φ3mm copper liquid nitrogen tube; the surface of the cooling plate 124 is provided with a heating mesh composed of heating wires 125 (specifically nickel-chromium alloy wires), wherein the nickel-chromium alloy wires are arranged in a serpentine pattern with a spacing of 4mm, and the maximum compensation power reaches 2000W; the temperature sensor is a distributed temperature measurement array, with 4 platinum resistance sensors configured in each 0.25m² area.

[0039] Through practical implementation and verification, compared with the traditional equipment used for temperature shock and thermal shock testing, which has a test cycle of 16 hours / test, this embodiment achieves a test cycle of 9.5 hours / test, with an efficiency improvement of 40.6%.

[0040] This embodiment also proposes a temperature control coupling scheme that combines liquid nitrogen phase change refrigeration with resistance heating compensation. It maintains a temperature control accuracy of ±0.8℃ even at -120℃. Compared to traditional thermal shock equipment, which experiences temperature fluctuations of ±5℃ at -120℃ and cannot meet the stringent ±1℃ requirement in the standard, this embodiment significantly improves temperature stability.

[0041] Because existing liquid nitrogen supply technologies employ a direct-flow design, the actual utilization rate of liquid nitrogen is less than 40%, and there is a risk of tank freezing and bursting. Preferably, in this embodiment, the liquid nitrogen supply tank and the liquid nitrogen recovery tank are each equipped with a compressed air inlet (for transporting liquid nitrogen via compressed air), and the liquid nitrogen recovery tank is equipped with a pressure relief port (for discharging liquid nitrogen that has evaporated into gas), establishing a liquid nitrogen reflux loop between the liquid nitrogen supply tank and the liquid nitrogen recovery tank. More preferably, in this embodiment, the liquid nitrogen recovery tank is also connected to a backup liquid nitrogen recovery tank, which... It is equipped with a compressed air inlet and a pressure relief port (for discharging liquid nitrogen that has evaporated into gas). A liquid nitrogen reflux loop is established in the liquid nitrogen supply tank, liquid nitrogen recovery tank, and backup liquid nitrogen recovery tank to further improve the recovery efficiency and flexibility of liquid nitrogen (avoiding the risk of tank freezing and bursting). The liquid nitrogen consumption for a single test is only 148L. The specific liquid nitrogen reflux pipeline and control valve can be set according to actual needs and common knowledge in the field (preferably a cryogenic solenoid valve can be used: response time ≤50ms, low temperature resistance up to -196℃). This embodiment does not make specific limitations in this regard.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated device for temperature shock and thermal vacuum testing, characterized in that, This includes a vacuum chamber with a vacuum extraction channel and a sealing cover; wherein, The vacuum chamber is provided with a heating sub-chamber and a cooling sub-chamber that are arranged in a sealed interval; The vacuum chamber is also equipped with a positioning and transfer module for the workpiece under test, which is used to install and position the workpiece under test, and at the same time realize the displacement switching of the workpiece under test between the heating sub-chamber and the cooling sub-chamber.

2. The integrated temperature shock and thermal vacuum testing equipment according to claim 1, characterized in that, The positioning and transfer module includes a workpiece mounting tray; wherein, the workpiece mounting tray is mounted on a displacement driving unit, and the displacement of the workpiece mounting tray between the heating sub-chamber and the cooling sub-chamber is achieved by the driving displacement of the displacement driving unit.

3. The integrated temperature shock and thermal vacuum testing equipment according to claim 2, characterized in that, The heating sub-chamber and the cooling sub-chamber are spaced apart in the Z-axis direction; wherein, the displacement driving unit includes an X-axis or Y-axis propulsion driving unit and a Z-axis displacement driving unit, the workpiece mounting tray is mounted on the X-axis or Y-axis propulsion driving unit, and the X-axis or Y-axis propulsion driving unit is mounted on the Z-axis displacement driving unit.

4. The integrated temperature shock and thermal vacuum testing equipment according to claim 3, characterized in that, The X-axis or Y-axis propulsion drive unit includes a lead screw that is rotatably mounted on the propulsion base plate, and a first drive motor for driving the lead screw. The workpiece mounting tray is connected to the lead screw via a lead screw nut. The Z-axis displacement drive unit includes a Z-axis lead screw that is rotatably mounted on the mounting bracket, and a second drive motor for driving the Z-axis lead screw. The propulsion base plate is connected to the Z-axis lead screw via a Z-axis lead screw nut.

5. The integrated temperature shock and thermal vacuum testing equipment according to claim 1, characterized in that, The heating sub-chamber is equipped with a heating chamber inlet and outlet, and a heating plate is installed inside it.

6. The integrated temperature shock and thermal vacuum testing equipment according to claim 5, characterized in that, The interior of the heating sub-chamber is provided with multiple heating plate area configuration layers arranged at intervals. Each heating plate area configuration layer is connected to the inlet and outlet of the heating chamber, and each heating plate area configuration layer is provided with one or more heating plates.

7. The integrated temperature shock and thermal vacuum testing equipment according to claim 5, characterized in that, The heating plate is an alumina ceramic heating plate, and each heating plate is equipped with a thermocouple.

8. The integrated equipment for temperature shock and thermal vacuum testing according to claim 1, characterized in that, The refrigeration sub-chamber is equipped with a cold chamber inlet and outlet, and a refrigeration plate is installed inside it.

9. The integrated temperature shock and thermal vacuum testing equipment according to claim 8, characterized in that, The cooling plate has a serpentine cooling channel, the inlet and outlet of which are connected to a liquid nitrogen supply tank and a liquid nitrogen recovery tank, respectively; the surface of the cooling plate is provided with heating wires and a temperature sensor is installed.

10. The integrated temperature shock and thermal vacuum testing equipment according to claim 8, characterized in that, The interior of the refrigeration sub-chamber is provided with multiple refrigeration plate area configuration layers arranged at intervals. Each refrigeration plate area configuration layer is connected to the inlet and outlet of the cold chamber, and each refrigeration plate area configuration layer is provided with a refrigeration plate.

11. The integrated temperature shock and thermal vacuum testing equipment according to claim 10, characterized in that, The cooling channels of the cooling plates in the adjacent cooling plate area configuration layer are connected in series; the inlet of the cooling channel of the cooling plate in the adjacent cooling plate area configuration layer at the first end is connected to the liquid nitrogen supply tank, and the outlet of the cooling channel of the cooling plate in the adjacent cooling plate area configuration layer at the end is connected to the liquid nitrogen recovery tank.

12. The integrated equipment for temperature shock and thermal vacuum testing according to claim 9, characterized in that, A serpentine pattern of slots is made on the cooling plate, and liquid nitrogen pipes are installed in the slots to form the cooling channels.

13. The integrated temperature shock and thermal vacuum testing equipment according to claim 9 or 11, characterized in that, The liquid nitrogen supply tank and the liquid nitrogen recovery tank are each equipped with a compressed air inlet, and the liquid nitrogen recovery tank is equipped with a pressure relief port.

14. The integrated temperature shock and thermal vacuum testing equipment according to claim 13, characterized in that, The liquid nitrogen recovery tank is also connected to a backup liquid nitrogen recovery tank, which is equipped with a compressed air inlet and a pressure relief port.

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