CN112817196A

CN112817196A - Large-scale high rigidity lens hood of accomodating that can expand

Info

Publication number: CN112817196A
Application number: CN202110156179.XA
Authority: CN
Inventors: 丁海鑫; 沈毅力; 王舒杨; 薛景赛; 张晓彤
Original assignee: Shanghai Institute of Satellite Engineering
Current assignee: Shanghai Institute of Satellite Engineering
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-05-18
Anticipated expiration: 2041-02-04
Also published as: CN112817196B

Abstract

The invention provides a large-scale deployable high-rigidity high-storage-ratio light shield, which comprises: the device comprises an expansion cover, a supporting cylinder, an expansion mechanism, a large-bearing compression release device, a locking mechanism and a backlight surface heat dissipation hole, wherein the expansion cover is connected with the supporting cylinder, the expansion mechanism is arranged at the joint rotation position of the expansion cover and the supporting cylinder, the locking mechanism is arranged at the joint position of the expansion cover and the supporting cylinder and on the sunlight irradiation side, and the backlight surface heat dissipation hole is arranged on the side of the supporting cylinder back to the sunlight; when the unfolding cover is folded and clings to the supporting cylinder, the large-bearing pressing and releasing device is connected with the unfolding cover and the supporting cylinder. For the mechanically unfolded light shield, the light shield and the support cylinder are integrally designed in a folded state, so that the whole light shield has higher rigidity and smaller envelope size, the structural lightweight is fully considered, and the light shield has better rigidity, smaller envelope size and higher material utilization rate.

Description

Large-scale high rigidity lens hood of accomodating that can expand

Technical Field

The invention relates to a spacecraft structure, in particular to a large-scale deployable high-rigidity high-storage-ratio light shield.

Background

With the development of spacecraft technology, large optical lenses and light shields thereof are increasingly widely applied to spacecrafts, and the requirements on the size are increasingly increased, but the conventional light shield has large weight, low rigidity and low material utilization rate, so that the large optical lenses and the light shields are not suitable for being applied to future spacecrafts.

A large deployable hood mechanism CN201310658895.3 applied to a spacecraft, a large inflatable film hood structure CN201710571616.8 capable of being deployed in space and a deployable hood CN201610396374.9 driven by memory alloy for GEO laser communication all provide designs for an inflatable deployment mechanism and a deployment mode of the hood.

The above technical problems have raised the demand for a lens hood for a large optical lens of a medium and high orbit satellite. Therefore, from the aspects of product simplicity and practicability, aiming at the shading requirements of certain high-orbit type satellites, the invention designs the large-scale shading cover with high developability, high rigidity and high storage ratio.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a large-scale light shield with high developability, high rigidity and high storage ratio.

According to the present invention, there is provided a large-sized light shield with high developability, high rigidity and high storage ratio, comprising: the device comprises an expansion cover, a supporting cylinder, an expansion mechanism, a large-bearing compression release device, a locking mechanism and a backlight surface heat dissipation hole, wherein the expansion cover is connected with the supporting cylinder, the expansion mechanism is arranged at the joint rotation position of the expansion cover and the supporting cylinder, the locking mechanism is arranged at the joint position of the expansion cover and the supporting cylinder and on the sunlight irradiation side, and the backlight surface heat dissipation hole is arranged on the side of the supporting cylinder back to the sunlight; when the unfolding cover is folded and clings to the supporting cylinder, the large-bearing pressing and releasing device is connected with the unfolding cover and the supporting cylinder.

Preferably, the unfolding cover adopts a 180-degree beveling design, and the design reduces the weight of the unfolding cover by more than 30%.

Preferably, the unfolding cover and the supporting cylinder are designed integrally, and the unfolding cover and the supporting cylinder play a role in bearing force together as a part of a structure when folded.

Preferably, the natural frequency of the light shield reaches more than 10Hz when the light shield is folded, and the longitudinal space storage ratio reaches 50%.

Preferably, the design of the heat dissipation holes on the backlight surface reduces the weight of the support cylinder by more than 40%.

Preferably, the unfolding mechanism can unfold the unfolding cover, the locking mechanism locks the unfolding cover after unfolding, and the locking mechanism enables the natural frequency of the light shield to reach more than 0.5Hz after locking.

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

for the mechanically unfolded light shield, the whole body has higher rigidity and smaller envelope size through the integrated design of the light shield and the supporting cylinder in a furled state, the light shield and the supporting cylinder can meet the working requirements of the part aiming at the light shielding requirements of certain high-orbit type satellites after being unfolded, the structural lightweight is fully considered in the design, and the light shield has better rigidity, smaller envelope size and higher material utilization rate.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of a large, deployable, high stiffness, high storage ratio hood;

FIG. 2 is a schematic drawing of a large, expandable, high-rigidity, high-storage-ratio hood

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

In the design, the height of the light shield is not less than 14m after the light shield is unfolded, and the diameter is about 4.5m, and the following configuration design is proposed for the unfolding of the ultra-large light shield:

as shown in fig. 1, the unfolding cover 1 is an unclosed type light shield, and is suitable for geosynchronous orbit, so the use requirement is partial direction light shielding, the unfolding cover 1 adopts a 180-degree oblique cutting design, compared with a complete cylindrical unfolding cover, the unfolding cover 1 with the structure meets the load light shielding requirement, simultaneously further reduces the weight, and reduces the weight by more than 30%. The supporting cylinder 2 is designed by adopting the backlight surface heat dissipation holes 6, the weight is reduced by more than 40% compared with that of a complete cylinder, the light weight design is realized, and a good heat dissipation environment is provided for loads in an unfolded state.

After the track is entered, the unfolding cover 1 is unfolded by the driving torque of the unfolding mechanism 3 until the unfolding cover is unfolded in place. After the light shield is unfolded in place, the locking mechanism 5 completes locking, and the locking mechanism 3 has a higher overall modal frequency in an unfolded state by means of the locking function of the locking mechanism 5 and double locking of the locking mechanism 5, and particularly for large light shields with the height of 7m or more, if the inherent frequency of the locking mechanism 5 after being unfolded in place is lower than 0.1Hz, the inherent frequency of the locking mechanism 5 after being unfolded in place is up to 0.5Hz, so that the light shield disclosed by the invention has higher rigidity after being unfolded, and is beneficial to posture control and saving of system resources.

As shown in fig. 2, the supporting cylinder 2 and the unfolding cover 1 are designed into a whole, the unfolding cover 1 is pressed on the supporting cylinder 2 in a folded state, the unfolding cover 1 and the supporting cylinder 2 are connected with high rigidity and high strength through the large bearing compression release device 4, at the moment, the unfolding cover 1 and the supporting cylinder 2 form an approximately closed cylinder, the active section unfolding cover 1 and the supporting cylinder 2 together play a role of bearing force as a part of the structure, the mechanical property of the whole folded state is improved, compared with the light shield with the non-integrated design of the supporting cylinder 2 and the unfolding cover 1, particularly, the natural frequency of the supporting cylinder 2 with the height of 7m or more is lower than 5Hz, and the natural frequency of the light shield adopting the invention reaches more than 10Hz, and the longitudinal space storage ratio of the light shield reaches 50%, so that the light shield has high storage ratio and high rigidity in a folded state.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The utility model provides a large-scale high storage ratio lens hood of high rigidity that can expand which characterized in that includes: the device comprises an expansion cover (1), a support cylinder (2), an expansion mechanism (3), a large-bearing compression release device (4), a locking mechanism (5) and backlight radiating holes (6), wherein the expansion cover (1) is connected with the support cylinder (2), the expansion mechanism (3) is arranged at the connection rotation position of the expansion cover (1) and the support cylinder (2), the locking mechanism (5) is arranged at the connection position of the expansion cover (1) and the support cylinder (2) and at the sunlight irradiation side, and the backlight radiating holes (6) are arranged at the side of the support cylinder (2) opposite to the sunlight side; when the unfolding cover (1) is folded and tightly attached to the supporting cylinder (2), the large-bearing pressing and releasing device (4) is connected with the unfolding cover (1) and the supporting cylinder (2).

2. A large, deployable, high stiffness, high storage ratio light shield as claimed in claim 1, wherein: the unfolding cover (1) adopts a 180-degree beveling design.

3. A large, deployable, high stiffness, high storage ratio light shield as claimed in claim 1, wherein: the unfolding cover (1) and the supporting cylinder (2) are designed integrally, and the unfolding cover (1) and the supporting cylinder (2) play a role in bearing force together as a part of a structure when folded.

4. A large, deployable, high stiffness, high storage ratio light shield as claimed in claim 3, wherein: when the sunshade is folded, the natural frequency of the sunshade reaches more than 10Hz, and the accommodation ratio of the longitudinal space reaches 50 percent.

5. A large, deployable, high stiffness, high storage ratio light shield as claimed in claim 1, wherein: the design of the heat dissipation holes (6) on the backlight surface reduces the weight of the supporting cylinder (2) by more than 40%.

6. A large, deployable, high stiffness, high storage ratio light shield as claimed in claim 1, wherein: the unfolding mechanism (3) can unfold the unfolding cover (1), the locking mechanism (5) locks the unfolding cover (1) after unfolding, and the natural frequency of the light shield can reach over 0.5Hz after the locking mechanism (5) is locked.