An on-orbit inspection linear motion mechanism and an on-orbit inspection device

Abstract

The invention relates to an on-track inspection device for an on-track inspection linear motion mechanism, which comprises a driving mechanism, a conical friction wheel, a friction rod, a guide rail, a slider assembly and a spring. The tapered friction wheel is frictionally fitted; the outer peripheral side of the tapered friction wheel is in contact with the friction rod; the guide rail is parallel to the friction rod; one end of the slider assembly is slidably installed on the guide rail, and the other end is fixedly connected with the driving mechanism; on the output shaft of the drive mechanism and sandwiched between the conical friction wheel and the slider assembly; the spring is in a compressed state. Guide and limit are provided by the guide rails; when the high and low temperature outside the cabin act, each material has different deformations, which may cause the pressure between the conical friction wheel and the friction rod to disappear, or the guide rail and the slider to get stuck and other failure modes; certain The spring force is pre-tightened, so that the present invention has enough temperature difference adjustment space, so that the present invention can adapt to the change of high and low temperature outside the cabin, and has strong environmental adaptability and reliability.

Description

technical field [0001] The invention relates to the field of space linear motion mechanisms, in particular to an on-orbit inspection linear motion mechanism and an on-orbit inspection device. Background technique [0002] In space scientific research, the use of various materials, especially new materials, is inseparable. The purpose of material space environment exposure experiment is to study the service behavior of materials under the action of special space environmental effects. [0003] 1. The impact of space environment on institutional reliability [0004] Compared with the agencies working on the ground, the differences in the work of space agencies are mainly caused by the space environment, and the space dynamics environment is different from the ground environment. [0005] 1.1 Influence of space environment [0006] (1) Microgravity influence [0007] Because the current spacecraft is usually adjusted on the ground, that is, the adjustment is carried out und...

AI Technical Summary

Problems solved by technology

[0008] (2) Effect of pressure difference

[0009] The effect of differential pressure is usually in the range of 1×10- 2 Pa~1×10- 5 Occurs in the vacuum range of Pa. When there is a sealed structure in the spacecraft, the internal and external differences of the sealed structure will increase, resulting in structural deformation or damage

[0010] (3) Effect of vacuum outlet

Released gases can re-condense on colder components, contaminating optics, sensors, and thermal control coatings with optically selective properties, resulting in reduced optical performance, increased solar absorption, and elevated temperatures

[0012] (4) Effect of radiation heat transfer

[0017] (6) Micro meteors and space debris

Once these institutions leak, the consequences will be quite serious

The complexity of the space environment will lead to the aging of the sealing material and the reduction of the sealing performance. Therefore, the sealing design is also an important part of the reliability design of the spacecraft.

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