CN102364370B - Low temperature optical system support device with high heat insulation efficiency and small thermal stress influence - Google Patents

Abstract

The invention relates to a low-temperature optical system support device with high heat insulation efficiency and low thermal stress influence. In the device, the support inner ring and the second heat insulation ring are fixed by three second support blocks evenly distributed on the circumference of the support inner ring. connection, the second heat insulation ring and the first heat insulation ring are fixedly connected through three transition blocks evenly distributed on the circumference of the second heat insulation ring, and the first heat insulation ring and the supporting outer ring are fixedly connected on the circumference of the supporting outer ring The three first support blocks are fixedly connected, and the support device of the present invention adopts a double-glass reinforced plastic ring structure, which prolongs the path length of heat conduction, increases the thermal resistance between the high temperature end and the low temperature end, and greatly improves the The heat insulation efficiency of the component; and the ring structure of the glass fiber reinforced plastic material of the structural form, as the flexible link in the structural component, bears the main thermal deformation, reduces the force acting on the optical system, and ensures the accuracy of the optical system , to improve the detection capability of the optical system.

Description

A low-temperature optical system support device with high thermal insulation efficiency and low thermal stress influence

technical field

The invention belongs to the field of low-temperature optics of aerospace optical remote sensors, and relates to a low-temperature optical system supporting device with high heat insulation efficiency and low thermal stress influence.

Background technique

With the rapid development of aerospace optical remote sensor technology, the requirements for the infrared detection capability of the deep space low temperature background of the optical remote sensor are also getting higher and higher. Target detection, in order to reduce the heat leakage of the low-temperature optical system, reduce the requirements of the remote sensor on the space cooling system capacity, and reduce the thermal deformation and thermal stress of the optical system, to ensure the accuracy of the optical system, high heat insulation efficiency, small thermal The design of support structures affected by stress is of great significance. At present, the structural forms that are often used for the support of low temperature systems at home and abroad mainly include: plastic heat insulation sleeves, glass fiber reinforced plastic rods, etc. It is difficult to meet the requirements of heat insulation efficiency and support stiffness in the form of plastic heat insulation sleeves, and it is difficult to realize the support of low-temperature optical systems with large temperature differences; although glass fiber reinforced plastic rod supports can properly improve heat insulation efficiency and ensure a certain support stiffness, but Because thermal deformation will generate a lot of force on the optical system, it will cause deformation of the low-temperature optical system and seriously affect the imaging quality.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a low-temperature optical system support device with high thermal insulation efficiency and low thermal stress influence. The thermal insulation efficiency of the low temperature optical system supporting device is improved, and the influence of thermal stress on the optical system is reduced, thereby ensuring the accuracy requirements of the optical system and improving the detection capability of the optical system.

Above-mentioned purpose of the present invention is achieved by following technical scheme:

A low-temperature optical system support device with high heat insulation efficiency and low thermal stress influence, comprising a support inner ring, a support outer ring, a first heat insulation ring, a second heat insulation ring, a transition block, a first support block and a second support block , wherein the optical system is placed inside the supporting inner ring and connected with the supporting inner ring, the supporting inner ring is fixedly connected with the second heat insulating ring through three second supporting blocks evenly distributed on the circumference of the supporting inner ring, the second heat insulating ring It is fixedly connected with the first heat insulation ring through three transition blocks evenly distributed on the circumference of the second heat insulation ring, and the first heat insulation ring is connected with the support outer ring through three first support blocks evenly distributed on the circumference of the support outer ring Fixed connection, wherein the supporting outer ring is the high temperature end of the supporting device, and the supporting inner ring is the low temperature end of the supporting device.

In the low-temperature optical system support device with high thermal insulation efficiency and low thermal stress, the line connecting the positions of the first support block and the second support block passes through the center of the support inner ring, and the first support block, the second support block and the transition The blocks are staggered so that the angle between any first support block, second support block and adjacent transition blocks is 60°.

In the low-temperature optical system supporting device with high heat insulation efficiency and low thermal stress influence, the support inner ring and the second heat insulation ring are fixed by screws respectively passing through the support inner ring, the second support block and the second heat insulation ring Connection, the second heat insulation ring and the first heat insulation ring are fixedly connected by screws passing through the second heat insulation ring, the transition block and the first heat insulation ring respectively, and the first heat insulation ring and the supporting outer ring are connected by Screws passing through the first heat insulation ring, the first support block and the support outer ring respectively are fixedly connected.

In the low-temperature optical system support device with high thermal insulation efficiency and low thermal stress influence, the support inner ring is integrated with the three second support blocks, the support outer ring is integrated with the three first support blocks, and the three support blocks are integrated. Transition blocks are designed independently.

In the low-temperature optical system supporting device with high thermal insulation efficiency and low thermal stress influence, the supporting inner ring, supporting outer ring, transition block, first supporting block and second supporting block are all made of titanium alloy or stainless steel.

In the low temperature optical system supporting device with high thermal insulation efficiency and low thermal stress, the first thermal insulation ring and the second thermal insulation ring are made of glass fiber reinforced plastic composite material.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The supporting outer ring of the low temperature optical system supporting device of the present invention is fixedly connected with the first heat insulating ring through three first supporting blocks a1, a2 and a3 uniformly distributed around the circumference, and the second heat insulating ring is fixedly connected with the three first supporting blocks a1, a2 and a3 uniformly distributed around the circumference. Three transition blocks b1, b2, b3 are fixedly connected to the first heat insulation ring, and the supporting inner ring is fixedly connected to the second heat insulation ring through three second support blocks c1, c2, c3 uniformly distributed on the circumference. The conduction path from the high-temperature end to the low-temperature end is extended, that is, the thermal resistance between the high-temperature end and the low-temperature end is increased, thereby greatly improving the heat insulation efficiency of the support device;

(2) The structure of the double heat insulating rings of the low temperature optical system supporting device of the present invention is very long because the distance between the action point of the force and the relative fixed point, and the two heat insulating rings are all made of glass fiber reinforced plastic composite materials, supporting the inner ring, The supporting outer ring, the transition block and the two sets of supporting blocks are all made of titanium alloy, and the elastic modulus of glass fiber reinforced plastic is smaller than that of titanium alloy. Thermal deformation can greatly reduce the force of the supporting device on the optical system, thereby ensuring the accuracy of the optical system at low temperature;

(3) The low-temperature optical system support device of the present invention can well ensure the accuracy requirements of the optical system and improve the detection capability of the optical system, and its structure can be used for other ground and space requirements for heat insulation efficiency and thermal stress level as required Higher low temperature system support, with a wider range of applications.

Description of drawings

Fig. 1 is a structural schematic diagram of a support device for a cryogenic optical system of the present invention;

Fig. 2 is a cross-sectional view of the structure of the cryogenic optical system supporting device of the present invention;

Fig. 3 is a force diagram of the first heat insulation ring in the low temperature optical system supporting device of the present invention;

Fig. 4 is a force diagram of the second heat insulating ring in the supporting device of the cryogenic optical system of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

As shown in Figure 1, it is a schematic structural diagram of the support device for the low temperature optical system of the present invention, and Figure 2 is a cross-sectional view of the structure of the support device for the low temperature optical system of the present invention. It can be seen from the figure that the support device includes a support inner ring 2, a support outer ring 3, a A heat insulation ring 4, a second heat insulation ring 5, three transition blocks 6, three first support blocks 7 and three second support blocks 8, wherein the optical system 1 is placed inside the support inner ring 2 and connected to the support The ring 2 is connected, the supporting inner ring 2 is fixedly connected with the second heat insulation ring 5 through three second supporting blocks 8 (c1, c2, c3 in Fig. 1 ) evenly distributed on the circumference of the supporting inner ring 2, and the supporting inner ring 2 and the three second support blocks c1, c2, c3 are integrally designed, and the screws respectively pass through the support inner ring 2, the second support block 8 and the second heat insulation ring 5, and connect the support inner ring 2 with the second insulation ring The hot ring 5 is fixedly connected, as shown in FIG. 2 .

The second heat insulation ring 5 is fixedly connected to the first heat insulation ring 4 through three transition blocks 6 (b1, b2, b3 in Fig. 1) uniformly distributed on the circumference, and the three transition blocks b1, b2, b3 are independent Design, sandwiched between two heat insulation rings, and the screws pass through the second heat insulation ring 5, the transition block 6 and the first heat insulation ring 4 respectively, and fix the second heat insulation ring 5 and the first heat insulation ring 4 connection, see Figure 2.

The first heat insulating ring 4 is fixedly connected to the support outer ring 3 through three first support blocks 7 (a1, a2, a3 in Fig. 1 ) evenly distributed on the circumference of the support outer ring 3, and the support outer ring 3 is connected to the three The first support blocks a1, a2, a3 are integrated design, and the screws respectively pass through the first heat insulation ring 4, the first support block 7 and the support outer ring 3 to fix the first heat insulation ring 4 and the support outer ring 3 connection, see Figure 2.

In this embodiment, the arrangement of the first support block 7 and the second support block 8 is consistent, so that the line connecting the positions of the first support block 7 and the second support block 8 passes through the center of the supporting inner ring 2, and the first support block 7 /The second support block 8 is arranged in a staggered manner with the transition block 6, so that the angle between any first support block 7/second support block 8 and the adjacent transition block 6 is 60°, as shown in Figure 1, a1, The connection line of c1, the connection line of a2, c2, and the connection line of a3, c3 all pass through the center of the supporting inner ring 2, the angles between a1/c1 and b2 or b3 are all 60°, a2/c2 and b2 or The included angles between b1 are all 60°, and the included angles between a3/c3 and b1 or b3 are both 60°.

The support inner ring 2, the support outer ring 3, the transition block 6, the first support block 7 and the second support block 8 are all made of titanium alloy, and the first heat insulation ring 4 and the second heat insulation ring 5 are all made of glass fiber reinforced plastic composite materials . The supporting outer ring 3 is the ambient temperature (high temperature end), and the supporting inner ring 2 is connected to the optical system 1 and is the low temperature end of the supporting device.

It can be seen from Figures 1 and 2 that the structural form of the support device of the present invention extends the conduction path of heat from the high temperature end to the low temperature end, thus increasing the thermal resistance between the high temperature end and the low temperature end, thereby improving the structural form. Insulation efficiency. And because the distance between the point of action of the force and the relative fixed point is very long in this structural form, as shown in Figures 3 and 4, they are respectively the first heat insulating ring and the second heat insulating ring in the low temperature optical system support device of the present invention. In addition, the elastic modulus of FRP is smaller than that of titanium alloy. Therefore, the heat insulation ring of FRP material becomes the flexible link in the structural component, which bears the main thermal deformation and can greatly reduce the role of the supporting device. The force acting on the optical system 1 can ensure the accuracy of the optical system at low temperature and improve the detection capability of the optical system 1 .

With the improvement of infrared detection ability requirements for deep space exploration, the temperature of the optical system of the space camera currently under development in China is 120K, and the temperature of the optical system of existing cameras abroad is required to be below 10K. The supporting device of the present invention is aimed at the above-mentioned low temperature optical system. The structural design is carried out according to the high requirements of the support structure, and its structure can be used for the support of other low-temperature systems that require high heat insulation efficiency and thermal stress level on the ground and space according to the needs, and has a wide range of applications.

The above description is only the best specific implementation mode of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of changes or modifications within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention.

The content that is not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims (6)

1. the Cryogenic Optical System bracing or strutting arrangement of the little thermal stress influence of a high heat-insulating efficiency, it is characterized in that: comprise and support interior ring (2), support outer shroud (3), first heat insulation loop (4), second heat insulation loop (5), transition block (6), first back-up block (7) and second back-up block (8), wherein optical system (1) places the interior ring of support (2) inside and is connected with interior encircle (2) of support, ring (2) is fixedlyed connected by being distributed on three second back-up blocks (8) that support on interior ring (2) excircle with second heat insulation loop (5) in supporting, second heat insulation loop (5) is fixedlyed connected by three transition block (6) that are distributed on second heat insulation loop (5) excircle with first heat insulation loop (4), first heat insulation loop (4) is fixedlyed connected by being distributed on three first back-up blocks (7) that support on outer shroud (3) inner periphery with support outer shroud (3), wherein support outer shroud (3) and be the temperature end of bracing or strutting arrangement, ring (2) is the low-temperature end of bracing or strutting arrangement in supporting.

2. the Cryogenic Optical System bracing or strutting arrangement of the little thermal stress of a kind of high heat-insulating efficiency according to claim 1 influence, it is characterized in that: described first back-up block (7) passes through to support the interior center of encircling (2) with the line of second back-up block (8) position, and first back-up block (7), second back-up block (8) are staggered with transition block (6), make that the angle between any first back-up block (7), second back-up block (8) and the adjacent transition block (6) is 60 °.

3. the Cryogenic Optical System bracing or strutting arrangement of the little thermal stress of a kind of high heat-insulating efficiency according to claim 1 influence, it is characterized in that: support interior ring (2) by passing respectively between ring (2) and second heat insulation loop (5) in the described support, second back-up block (8) is fixedlyed connected with the screw of second heat insulation loop (5), between described second heat insulation loop (5) and first heat insulation loop (4) by passing second heat insulation loop (5) respectively, transition block (6) is fixedlyed connected with the screw of first heat insulation loop (4), described first heat insulation loop (4) and supporting between the outer shroud (3) by passing first heat insulation loop (4) respectively, first back-up block (7) is fixedlyed connected with the screw that supports outer shroud (3).

4. the Cryogenic Optical System bracing or strutting arrangement of the little thermal stress of a kind of high heat-insulating efficiency according to claim 1 influence, it is characterized in that: ring (2) is the integrated design with three second back-up blocks (8) in the described support, described support outer shroud (3) is the integrated design with three first back-up blocks (7), and three transition block (6) are independent design.

5. the Cryogenic Optical System bracing or strutting arrangement of the little thermal stress influence of a kind of high heat-insulating efficiency according to claim 1 is characterized in that: encircle (2), support outer shroud (3), transition block (6), first back-up block (7) and second back-up block (8) in the described support and be titanium alloy or stainless steel preparation.

6. the Cryogenic Optical System bracing or strutting arrangement of the little thermal stress of a kind of high heat-insulating efficiency according to claim 1 influence, it is characterized in that: described first heat insulation loop (4) prepares for glass fiber reinforced plastics composite material with second heat insulation loop (5).

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