Integrated linear Stirling refrigeration infrared detector assembly

Abstract

The utility model relates to a detector assembly, belongs to the technical field of Stirling refrigeration equipment, and particularly relates to an integrated linear Stirling refrigeration infrared detector assembly which comprises a Stirling cryocooler, a metal Dewar outer layer and a metal Dewar inner layer, the metal Dewar outer layer is arranged above the Stirling cryocooler, and the metal Dewar inner layer is arranged above the Stirling cryocooler. The metal Dewar inner layer is arranged in the metal Dewar outer layer, an input pipe is arranged in the metal Dewar inner layer, the input pipe downwards penetrates through the bottom wall face of the metal Dewar inner layer, the input pipe is communicated with the interior of the metal Dewar outer layer and the interior of the metal Dewar inner layer, and an output pipe is fixedly installed at the output end of the Stirling cryocooler. A connector is movably installed at the bottom of the metal Dewar outer layer in an embedded mode, the connector is a pipe with one end of a spherical structure, and the output pipe is located in the connector. The effect of reducing the influence of force generated by frequent starting of the Stirling cryocooler on the metal Dewar is achieved, and then the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of Stirling refrigeration equipment technology, and in particular to an integrated linear Stirling refrigerated infrared detector assembly. Background Technology

[0002] The integrated linear Stirling-cooled infrared detector assembly is a high-efficiency, compact infrared detection system that uses a Stirling cooler to provide a cryogenic environment to ensure optimal performance of the infrared detector. It is widely used in military, aerospace, medical, and industrial fields.

[0003] In existing systems, frequent starts can exacerbate vibrations in the Stirling refrigerator, especially during startup, where the reciprocating motion of the piston generates periodic mechanical stress. This vibration is transmitted to the metal Dewar through connecting components, potentially causing fatigue damage at the interfaces, such as weld cracking, seal failure, or loosening of thermally connected components, thus affecting the overall lifespan of the equipment. Utility Model Content

[0004] To address the aforementioned technical problems, this invention proposes an integrated linear Stirling-cooled infrared detector assembly, which reduces the impact of the forces generated by the frequent start-up of the Stirling cooler on the metal Dewar, thereby improving the service life of the device.

[0005] The technical solution to achieve the purpose of this utility model is as follows: an integrated linear Stirling cooled infrared detector assembly, including a Stirling cooler, a metal Dewar outer layer, and a metal Dewar inner layer. The metal Dewar outer layer is located above the Stirling cooler, and the metal Dewar inner layer is located inside the metal Dewar outer layer. An input tube is provided inside the metal Dewar inner layer, penetrating downwards through the bottom wall of the metal Dewar inner layer. The input tube connects the interior of the metal Dewar outer layer and the interior of the metal Dewar inner layer. An output tube is fixedly installed on the output end of the Stirling cooler. A connector is movably installed at the bottom of the metal Dewar outer layer. The connector is a tube with a spherical structure at one end, and the output tube is located inside the connector. A support mechanism is provided between the Stirling cooler and the metal Dewar outer layer.

[0006] In some embodiments, the support mechanism includes a support rod, a slide groove, a slider, and a connecting shaft. The support rod is a telescopic cylindrical structure and is detachably fixedly installed on the top of the Stirling refrigerator. A spring is installed inside the support rod. The slide groove is opened on the bottom wall of the outer layer of the metal Dewar, corresponding to the position of the support rod. The slider is slidably installed inside the slide groove. The connecting shaft is movably installed on the slider. A rectangular groove is opened at the top of the support rod. The bottom of the slider is located inside the rectangular groove on the support rod. Both ends of the connecting shaft are embedded and movably installed inside the support rod. The support rod and the slider are movably connected by the connecting shaft.

[0007] In some embodiments, the outer wall of the output tube is fitted to the inner wall of the connector, and an annular sealing ring is provided at the bottom of the outer layer of the metal Dewar corresponding to the position of the connector.

[0008] In some embodiments, a spacer ring is fixedly installed below the inner wall of the outer metal Dewar layer, and the spacer ring is fixedly connected to the inner metal Dewar layer.

[0009] In some embodiments, a support block is fixedly mounted on the top of the inner metal Dewar layer, and the support block is fixedly connected to the outer metal Dewar layer.

[0010] In some embodiments, the inner layer of the metal Dewar is provided with a sealing mechanism, which includes a sealing plate, a mounting rod and a return spring. The sealing plate is located at the top of the input pipe, the mounting rod is fixedly installed above the inner wall of the inner layer of the metal Dewar, and the mounting rod extends downward through the upper and lower walls of the sealing plate. The return spring is sleeved on the mounting rod.

[0011] Compared with existing technologies, the significant advantages of this invention are:

[0012] This invention, through the design of a support mechanism, addresses the issue of vibration caused by frequent starts and stops of the Stirling refrigerator. Since the connector is movably mounted at the bottom of the outer layer of the metal Dewar, and the support rod is located inside the connector, the connector swings at the bottom of the outer layer of the metal Dewar during vibration. Because the connector has a spherical structure and a sealing ring is installed inside the outer layer of the metal Dewar, the swinging motion prevents it from affecting the sealing of the connection between the Stirling refrigerator and the outer layer of the metal Dewar. When vibration occurs, the slider moves inside the groove, and the slider and support rod are movably connected via a connecting shaft. When the outer layer of the metal Dewar tilts to one side, the support rod on that side is compressed, causing the spring inside the support rod to be stressed. The spring then releases its elastic force, counteracting the force of the vibration. This reduces the impact of the force generated by frequent starts of the Stirling refrigerator on the metal Dewar, thereby improving the service life of the device. Attached Figure Description

[0013] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention in one embodiment;

[0015] Figure 2 This is a cross-sectional view of the internal structure provided in one embodiment of the present invention;

[0016] Figure 3 This utility model provides in one embodiment Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4This utility model provides in one embodiment Figure 2 Enlarged view of section B in the middle.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Stirling refrigerator; 2. Outer metal Dewar layer; 3. Inner metal Dewar layer; 4. Inlet pipe; 5. Outlet pipe; 6. Connector; 7. Support rod; 8. Slide groove; 9. Slider; 10. Connecting shaft; 11. Spacer ring; 12. Support block; 13. Sealing plate; 14. Mounting rod; 15. Return spring. Detailed Implementation

[0020] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0021] This utility model provides an improved integrated linear Stirling cooled infrared detector assembly. The technical solution of this utility model is as follows:

[0022] like Figures 1 to 4 As shown, the integrated linear Stirling cooled infrared detector assembly includes a Stirling cooler 1, a metal Dewar outer layer 2, and a metal Dewar inner layer 3. Both the metal Dewar outer layer 2 and the metal Dewar inner layer 3 are hollow structures. The metal Dewar outer layer 2 is positioned above the Stirling cooler 1, and the metal Dewar inner layer 3 is positioned inside the metal Dewar outer layer 2. An input tube 4 is disposed inside the metal Dewar inner layer 3. The input tube 4 is a cylindrical tube that penetrates downwards through the bottom wall of the metal Dewar inner layer 3 and connects to the metal Dewar inner layer 3. Inside the outer layer 2 and the inner layer 3 of the metal Dewar, an output tube 5 is fixedly installed on the output end of the Stirling refrigerator 1. The output tube 5 is a cylindrical tube. A connector 6 is movably installed at the bottom of the outer layer 2 of the metal Dewar. The connector 6 is a tube with a spherical structure at one end. The output tube 5 is located inside the connector 6. The outer wall of the output tube 5 is in contact with the inner wall of the connector 6. An annular sealing ring is provided at the bottom of the outer layer 2 of the metal Dewar corresponding to the position of the connector 6. A support mechanism is provided between the Stirling refrigerator 1 and the outer layer 2 of the metal Dewar.

[0023] The support mechanism includes a support rod 7, a slide groove 8, a slider 9, and a connecting shaft 10. The support rod 7 is a telescopic cylindrical structure and is detachably fixed to the top of the Stirling refrigerator 1. A spring is installed inside the support rod 7. The slide groove 8 is a rectangular groove, located on the bottom wall of the outer metal Dewar layer 2 corresponding to the support rod 7. The slider 9 is a rectangular block that slides inside the slide groove 8. The connecting shaft 10 is a cylindrical structure and is movably mounted on the slider 9. A rectangular groove is provided at the top of the support rod 7, and the bottom of the slider 9 is located inside the rectangular groove on the support rod 7. Both ends of the connecting shaft 10 are movably mounted inside the support rod 7. The support rod 7 and the slider 9 are movably connected via the connecting shaft 10. Through the arrangement of the support mechanism, when the Stirling refrigerator 1 vibrates due to frequent opening and closing, due to... The connector 6 is movably mounted at the bottom of the outer metal Dewar 2, while the support rod 7 is located inside the connector 6. When vibration occurs, the connector 6 will swing at the bottom of the outer metal Dewar 2. Since the connector 6 has a spherical structure and the outer metal Dewar 2 has a sealing ring inside, the swinging is prevented from affecting the sealing of the connection between the Stirling refrigerator 1 and the outer metal Dewar 2. When vibration occurs, the slider 9 will move inside the slide groove 8. The slider 9 and the support rod 7 are movably connected through the connecting shaft 10. When the outer metal Dewar 2 tilts to one side, the support rod 7 on that side will be compressed, causing the spring inside the support rod 7 to be stressed. Subsequently, the spring releases its elastic force to counteract the force of vibration, thereby reducing the impact of the force generated by the frequent start-up of the Stirling refrigerator 1 on the metal Dewar, and thus improving the service life of the device.

[0024] A spacer ring 11 is fixedly installed on the lower inner wall of the outer metal Dewar 2. The spacer ring 11 has a circular structure and is fixedly connected to the inner metal Dewar 3. A support block 12 is fixedly installed on the top of the inner metal Dewar 3. The support block 12 has a cylindrical structure and is fixedly connected to the outer metal Dewar 2. The spacer ring 11 and the support block 12 support and separate the outer metal Dewar 2 and the inner metal Dewar 3, maintaining a cavity between the Stirling refrigerator 1 and the outer metal Dewar 2, thereby improving the heat insulation effect.

[0025] The inner layer 3 of the metal Dewar has a sealing mechanism, which includes a sealing plate 13, a mounting rod 14, and a return spring 15. The sealing plate 13 is a circular plate and is located at the top of the input pipe 4. The mounting rod 14 is a cylindrical structure and is fixedly installed on the upper inner wall of the inner layer 3 of the metal Dewar, extending downwards through the upper and lower walls of the sealing plate 13. The return spring 15 is sleeved on the mounting rod 14. When the Stirling refrigerator 1 outputs a cold source to the interior of the inner layer 3 of the metal Dewar, the cold source moves inside the input pipe 4, which then lifts the sealing plate 13, allowing the cold source to enter the interior of the inner layer 3 of the metal Dewar. When the Stirling refrigerator 1 stops operating, the sealing plate 13 returns to its original position under the action of the return spring 15, thereby sealing the input pipe 4 and achieving a multi-seal effect, further improving the heat insulation effect.

[0026] The specific working method is as follows:

[0027] By designing a support mechanism, when the Stirling refrigerator 1 vibrates due to frequent start-up and shutdown, the connector 6, which is movably mounted at the bottom of the outer metal Dewar 2, and the support rod 7, located inside the connector 6, will swing at the bottom of the outer metal Dewar 2 during vibration. Since the connector 6 is spherical and the outer metal Dewar 2 has a sealing ring inside, the swinging motion avoids affecting the sealing of the connection between the Stirling refrigerator 1 and the outer metal Dewar 2. When vibration occurs, the slider 9 moves inside the slide groove 8, and the slider 9 is movably connected to the support rod 7 via the connecting shaft 10. When the outer metal Dewar 2 tilts to one side, the support rod 7 on that side is compressed, causing the spring inside the support rod 7 to be stressed. The spring then releases its elasticity to counteract the force of the vibration, thereby reducing the impact of the force generated by the frequent start-up of the Stirling refrigerator 1 on the metal Dewar and thus improving the service life of the device.

[0028] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. An integrated linear Stirling cooled infrared detector assembly, comprising a Stirling cooler (1), a metal Dewar outer layer (2), and a metal Dewar inner layer (3), wherein the metal Dewar outer layer (2) is disposed above the Stirling cooler (1), and the metal Dewar inner layer (3) is disposed inside the metal Dewar outer layer (2), characterized in that: An input pipe (4) is provided inside the inner layer (3) of the metal Dewar. The input pipe (4) extends downward through the bottom wall of the inner layer (3) of the metal Dewar. The input pipe (4) connects the outer layer (2) of the metal Dewar and the interior of the inner layer (3). An output pipe (5) is fixedly installed on the output end of the Stirling refrigerator (1). A connector (6) is movably installed at the bottom of the outer layer (2) of the metal Dewar. The connector (6) is a tube with a spherical structure at one end. The output pipe (5) is located inside the connector (6). A support mechanism is provided between the Stirling refrigerator (1) and the outer layer (2) of the metal Dewar.

2. The integrated linear Stirling cryogenic infrared detector assembly of claim 1, wherein: The support mechanism includes a support rod (7), a slide groove (8), a slider (9), and a connecting shaft (10). The support rod (7) is a telescopic cylindrical structure. The support rod (7) is detachably fixedly installed on the top of the Stirling refrigerator (1). A spring is installed inside the support rod (7). The slide groove (8) is opened on the bottom wall of the outer layer (2) of the metal Dewar, corresponding to the position of the support rod (7). The slider (9) is slidably installed inside the slide groove (8). The connecting shaft (10) is movably installed on the slider (9). A rectangular groove is opened on the top of the support rod (7). The bottom of the slider (9) is located inside the rectangular groove on the support rod (7). The two ends of the connecting shaft (10) are embedded and movably installed inside the support rod (7). The support rod (7) and the slider (9) are movably connected through the connecting shaft (10).

3. The integrated linear Stirling cryogenic infrared detector assembly of claim 1, wherein: The outer wall of the output tube (5) is fitted with the inner wall of the connector (6), and an annular sealing ring is provided at the bottom of the metal Dewar outer layer (2) corresponding to the position of the connector (6).

4. The integrated linear Stirling cooled infrared detector assembly according to claim 1, characterized in that: A spacer ring (11) is fixedly installed below the inner wall of the outer metal Dewar layer (2), and the spacer ring (11) is fixedly connected to the inner metal Dewar layer (3).

5. The integrated linear Stirling cryogenic infrared detector assembly of claim 1, wherein: A support block (12) is fixedly installed on the top of the inner metal Dewar layer (3), and the support block (12) is fixedly connected to the outer metal Dewar layer (2).

6. The integrated linear Stirling cryogenic infrared detector assembly of claim 1, wherein: The inner layer (3) of the metal Dewar is provided with a sealing mechanism, which includes a sealing plate (13), a mounting rod (14) and a return spring (15). The sealing plate (13) is located at the top of the input pipe (4). The mounting rod (14) is fixedly installed above the inner wall of the inner layer (3) of the metal Dewar. The mounting rod (14) extends downward through the upper and lower walls of the sealing plate (13). The return spring (15) is sleeved on the mounting rod (14).

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