CN105353495B - Oval reflector supporting device and reflector assembly - Google Patents

Abstract

The invention relates to an elliptical reflector support device and a reflector assembly, comprising a U-shaped groove, a fixed end of a U-shaped bipod support rod, a slanting rod, and a reflector. The outer surfaces of the left and right side walls of the U-shaped groove pass through The oblique bar is connected with the fixed end of the U-shaped two-leg support rod; the U-shaped two-leg support rod stress relief grooves are arranged on the left and right side walls of the U-shaped groove, and the glue flow groove is arranged on the inner surface of the U-shaped groove. The invention solves the technical problem that the existing supporting device of the reflector assembly cannot guarantee the deformation stiffness of the mirror surface under the action of the space heat environment load and the strength of the damage under the action of the vibration dynamic environment load during the space launching process. The mirror support device and mirror assembly provided by the present invention are light in weight, small in space occupation envelope size, feasible in process, low in processing difficulty, simple in assembly and debugging, can withstand severe mechanical and thermal environments, and have no complicated mechanical interface.

Description

An elliptical reflector support device and reflector assembly

technical field

The invention belongs to the field of structural support of optical parts, in particular to a high-precision elliptical mirror support device and a mirror assembly.

Background technique

With the further development of space science and technology, the scope of use of space optical instruments is becoming wider and wider, and the requirements for use are getting higher and higher. In space optical instruments, the reflector is one of the essential key components. During the orbiting process, the weight of the reflector itself directly affects the launch cost and the surface shape accuracy of the reflector in the orbital working state with an exponential multiple relationship. And the pointing accuracy directly determines the performance of the instrument, so the design of the mirror and the performance of its supporting structure have important practical significance.

Due to the complex launch and outer space environment, space optical instruments need to withstand various environmental tests such as heat and mechanics. As an important part, the reflector has to experience vibration, overload, and impact during the launch stage; after entering orbit, it is in the special working environment in the field of space microgravity environment, which causes stress release and the harsh thermal environment of space. It will cause the surface shape of the mirror to change, which will lead to the degradation of the performance of space optical instruments.

To sum up, it is necessary to design the mirror components not only to ensure the rigidity and strength of the support and connection, but also to reduce its deformation due to environmental loads. At the same time, it is necessary to consider the lightweight design of the components.

Contents of the invention

In order to solve the technical problem that the existing support device of the elliptical mirror assembly cannot guarantee the deformation stiffness of the mirror surface under the action of the space thermal environment load and the strength of the damage under the action of the vibration dynamic environment load during the space launch process, and at the same time solve the technical problem of The technical problem of component design is light weight and small footprint envelope size. The invention provides an elliptical mirror supporting device and a mirror assembly.

Technical solution of the present invention is:

A supporting device for an elliptical mirror, characterized in that it includes a U-shaped groove 2, a fixed end 1 of a U-shaped bipod support rod, and an oblique rod 3, and the outer surfaces of the left and right side walls of the U-shaped groove 2 pass through The oblique bar 3 is connected with the fixed end 1 of the U-shaped two-leg support rod; the left and right side walls of the U-shaped groove 2 are provided with a U-shaped two-leg support rod stress relief groove 4, and the inner part of the U-shaped groove 2 Glue flow groove 5 is arranged on the surface.

The above-mentioned U-shaped two-leg support bar stress relief groove 4 includes a circular hole and a small through groove which are both perpendicular to the front and rear end faces of the U-shaped groove 2, and the small through groove is tangent to the circular hole.

There are multiple glue flow grooves 5 above, and the glue flow grooves 5 are through grooves perpendicular to the front and rear end faces of the U-shaped groove 2 .

The oblique rod 3 includes a support rod 31 in the middle and a connection assembly fixed at both ends of the support rod. The connection assembly includes a first flexible connecting piece 32, an adapter rod 33 and a second flexible connecting piece 34. A flexible connecting piece 32 and a second flexible connecting piece 34 are all connected to the adapter rod 33, and the second flexible connecting piece 34 is connected to the U-shaped groove 2 or the fixed end 1 of the U-shaped two-leg support rod; The arrangement direction of the first flexible connecting piece 32 and the second flexible connecting piece 34 is perpendicular to each other.

A fixing hole is arranged on the fixed end 1 of the U-shaped bipod support rod.

The reflector assembly is special in that it includes a reflector 6, an installation platform 7 and three or four reflector support devices,

The back side of the reflector 6 is provided with a plurality of radially arranged axisymmetric reinforcing ribs, and the circumference of the reflector supporting device is evenly distributed on the back of the reflecting mirror 6; the shape of the reinforcing rib is in phase with the U-shaped groove 2 of the reflecting mirror supporting device match;

The U-shaped groove 2 of the reflector supporting device is stuck on the reinforcing rib and fixed by bonding, and the fixed end 1 of the U-shaped bipod support rod is fixed on the installation platform 7 .

The above-mentioned U-shaped two-leg support bar stress relief groove 4 includes a circular hole and a small through groove which are both perpendicular to the front and rear end faces of the U-shaped groove 2, and the small through groove is tangent to the circular hole.

There are multiple glue flow grooves 5 above, and the glue flow grooves 5 are through grooves perpendicular to the front and rear end faces of the U-shaped groove 2 .

The above-mentioned oblique bar 3 includes a support bar 31 in the middle and a connection assembly fixed at both ends of the support bar. The connection assembly includes a first flexible connecting piece 32, an adapter rod 33 and a second flexible connecting piece 34. Both the first flexible connecting piece 32 and the second flexible connecting piece 34 are connected with the adapter rod, and the second flexible connecting piece 33 is connected with the U-shaped groove 2 or the fixed end 1 of the U-shaped two-leg support rod;

The arrangement direction of the first flexible connecting piece 32 and the second flexible connecting piece 34 is perpendicular to each other.

Fixing holes are arranged on the fixed end 1 of the U-shaped two-leg support rod, and the fixed end 1 of the U-shaped two-leg support rod is fixed on the installation platform 7 by screws.

The advantage of the present invention compared with prior art is:

1. The mirror support device and mirror assembly provided by the present invention are light in weight, small in space occupation envelope size, feasible in process, low in processing difficulty, simple in assembly and debugging, and can withstand severe mechanical and thermal environments without complex mechanical interface.

2. The invention not only improves the reliability and stability of the supporting structure of the large-scale high-precision mirror, but also contributes to the light weight, and has high engineering application value.

Description of drawings

Fig. 1 is the structural representation of a kind of oval reflector U-shaped support structure of the present invention;

Figure 2 is a schematic diagram of the high-precision elliptical mirror support technology;

Fig. 3 is a schematic diagram of a weight-reducing structure of a high-precision mirror.

The reference signs are: 1-U-shaped two-leg support rod fixed end, 2-U-shaped groove, 3-slanting rod, 4-U-shaped two-leg support rod stress relief groove, 5-glue flow groove, 6-reflector , 7-installation platform, 8-screw.

detailed description

In view of the requirements and characteristics of the supporting structure of the high-precision elliptical mirror of the present invention, combined with the use environment and manufacturability, a large-scale high-precision elliptical mirror supporting structure is provided, as shown in Figure 1, the structure of the present invention is not limited to the following Example.

A supporting device for a mirror: comprising a fixed end 1 of a U-shaped two-legged support rod, a U-shaped groove 2, an oblique rod 3, a stress-relief groove 4 for a U-shaped two-legged support rod, and a glue flow groove 5.

The inner surface of the U-shaped groove 2 cooperates with the reflector 6, the stress-relief groove 4 of the U-shaped two-leg support rod is placed on the end faces of the left and right ends of the U-shaped groove 2, and the glue flow groove 5 is placed on the inner surface of the U-shaped groove 2. The directions of the stress-relief groove 4 and the glue flow groove 5 of the two-legged support rod are both perpendicular to the front and rear end surfaces of the U-shaped groove 2, and both sides of the outer surface of the U-shaped groove 2 pass through the inclined rod 3 and the fixed end 1 of the U-shaped two-legged support rod. connect.

The oblique bar 3 includes a support rod 31 in the middle and a connection assembly fixed at both ends of the support rod. The connection assembly includes a first flexible connecting piece 32, an adapter rod 33 and a second flexible connecting piece 34. The first Both the connecting piece 32 and the second flexible connecting piece 34 are connected with the adapter rod 33, and the second flexible connecting piece 34 is connected with the U-shaped groove 2 or the fixed end 1 of the U-shaped bipod support rod; the first flexible connecting piece 32 It is perpendicular to the installation direction of the second flexible connecting piece 34 . When the external thermal and mechanical environment changes, the oblique rod 3 can produce thermal and mechanical strains offset by torsional deformation at the connecting piece in two directions; the width and thickness of the connecting piece can be adjusted according to the specific thermal and mechanical environment and the reflector 6 Structural dimensions are calculated.

The stress relief groove 4 of the U-shaped bipod support rod is a through groove perpendicular to the front and rear end faces of the U-shaped groove 2, the upper end of which is a circular hole, and the lower end is a small through groove tangent to the round hole at the upper end. When changing, the width of the small through groove at the lower end of the U-shaped two-leg support rod stress relief groove 4 changes accordingly, absorbing external energy, and avoiding the stress concentration at the connection opening between the U-shaped two-leg support rod and the reflector and tearing the glue layer; The width of the slot can be calculated according to the specific thermal and mechanical environment and the structural size of the reflector. The glue flow groove 5 is a through groove perpendicular to the front and rear end surfaces of the U-shaped groove 2. The U-shaped groove 2 is bonded to the reflector 6 by applying structural glue on the inner surface. The sticking force of the U-shaped groove 2 improves the firmness of the bonding of the two.

As shown in Figure 2, the reflector assembly based on the elliptical reflector support device includes a reflector 6, an installation platform 7 and three or four reflector support devices, as shown in Figure 3 there are eight radial lines on the back of the elliptical reflector. The ribs are symmetrically arranged according to a special angle, and the thermal expansion coefficient in the radial direction of the optimally designed carbon fiber composite base is close to zero. The circumference of the mirror supporting device is evenly distributed on the back of the reflecting mirror 6; the shape of the reinforcing rib matches the U-shaped groove 2 of the reflecting mirror supporting device; the U-shaped groove 2 of the reflecting mirror supporting device is clamped on the reinforcing rib and fixed, The fixed end 1 of the bipod support rod is fixed on the installation platform 7. Generally, for symmetry, there are four symmetrically installed supporting devices at the bottom of the reflector 6, and each U-shaped two-leg support rod is fixedly connected with the installation platform 7 through the through hole and the screw 8 at the fixed end of the U-shaped two-leg support rod.

The present invention selects Invar material, whose coefficient of thermal expansion is close to that of the glass material of the reflector 6, which can greatly reduce thermal deformation.

Claims (9)

1. A kind of 1. elliptic reflector support meanss, it is characterised in that：Including U-lag (2), U-shaped double support bar fixing end (1), brace (3), the outer surface of two side walls in left and right of the U-lag (2) are consolidated by brace (3) and U-shaped double support bar Fixed end (1) connects；U-shaped double support bar stress-removal groove (4) is provided with the side wall of left and right two of the U-lag (2), it is described Spew groove (5) is provided with the inner surface of U-lag (2)；The U-shaped double support bar stress-removal groove (4) includes being each perpendicular to U-shaped The circular port and small groove of groove (2) front and rear end, the small groove and circular port are tangent.
2. 2. elliptic reflector support meanss according to claim 1, it is characterised in that：The spew groove (5) to be a plurality of, The spew groove (5) is the groove perpendicular to U-lag (2) front/rear end.
3. 3. according to claim 1-2 any described elliptic reflector support meanss, it is characterised in that：

   The brace (3) includes positioned at middle support bar (31) and is fixed on the connection component at support bar both ends, the connection Component includes the first flexible connection piece (32), adapting rod (33) and the second flexible connection piece (34), the first flexible connection piece (32), the second flexible connection piece (34) is connected with adapting rod (33), the second flexible connection piece (34) and U-lag (2) or U Shape double support bar fixing end (1) connects；The first flexible connection piece (32) and the setting direction of the second flexible connection piece 34 It is orthogonal.
4. 4. elliptic reflector support meanss according to claim 3, it is characterised in that：U-shaped double support bar fixing end (1) fixing hole is equipped with.
5. A kind of 5. mirror assembly, it is characterised in that：Any described elliptic reflector support dress including claim 1-4 Put, in addition to speculum (6), mounting platform (7) and three or four mirror support devices；

   The back side of the speculum (6) is provided with the axial symmetry reinforcement of a plurality of radial arrangement, mirror support device circumference It is distributed on the back side of speculum (6)；The U-lag (2) of the reinforcement shape and mirror support device matches；

   The U-lag (2) of mirror support device is stuck on reinforcement and is adhesively fixed, and U-shaped double support bar fixing end (1) is fixed On mounting platform (7).
6. 6. mirror assembly according to claim 5, it is characterised in that：U-shaped double support bar stress-removal groove (4) bag The circular port for being each perpendicular to U-lag (2) front and rear end and small groove are included, the small groove and circular port are tangent.
7. 7. mirror assembly according to claim 6, it is characterised in that：The spew groove 5 is a plurality of, the spew groove (5) for perpendicular to the groove of U-lag (2) front/rear end.
8. 8. according to claim 5-7 any described mirror assembly, it is characterised in that：The brace (3) is included in being located at Between support bar (31) and be fixed on the connection component at support bar both ends, the connection component includes first and connects flexible tab (32), adapting rod (33) and the second flexible connection piece (34), described first connects flexible tab (32), the second flexible connection piece (34) It is connected with adapting rod, the second flexible connection piece (33) is connected with U-lag (2) or U-shaped double support bar fixing end (1)；

   The first flexible connection piece (32) is orthogonal with the setting direction of the second flexible connection piece (34).
9. 9. mirror assembly according to claim 8, it is characterised in that：It is equipped with U-shaped double support bar fixing end (1) solid Determine hole, the U-shaped double support bar fixing end (1) is fixed by screws on mounting platform (7).