a split nut

Abstract

The invention relates to a separating nut which comprises a shell, at least two split nuts, an annular connecting piece and a rotating ring. The annular connecting piece is arranged in the shell, andthe vertical direction of the rotating ring is limited by the annular connecting piece or the shell. The split nuts are limited by the annular connecting piece in the circumferential direction, and the displacement in the radial direction is controlled through rotation of the rotating ring. In the locked state, all the split nuts form a complete internal thread together, the rotating ring rotates,the split nuts are controlled to move outwards, and the separating nut enters an unlocked state. The locked state and the unlocked state of the separating nut are controlled through rotation of the rotating ring, and the process of unlocking and separating the nut does not have destructive damage to parts so that the separating nut can be repeatedly used, and the mechanical property of the separating nut can be detected before application. In addition, a shear frustum for bearing shear force is arranged on the upper portion of the shell, and the problem that a separating nut cannot bear shearforce is solved.

Description

technical field [0001] The invention relates to the field of star and arrow point connection unlocking in aerospace, in particular to a reusable separation nut. Background technique [0002] At present, with the development of the aerospace industry, the point unlocking device based on pyrotechnic separation nut has compact structure, high reliability and mature technology, and has been widely used in the connection unlocking between satellites and launch vehicles. At the same time, the satellite unlocks the connection point Higher and higher requirements have also been raised. Among them, the pyrotechnic separation nut is connected to the separation body, and through the instantaneous deflagration of the main charge, a violent axial impact is generated between the structures, thereby realizing its unlocking. [0003] However, first of all, this method causes the separation nut to be a one-time use product, so its mechanical properties can only be judged indirectly through ...

AI Technical Summary

Problems solved by technology

[0003] However, first of all, this method causes the separation nut to be a one-time use product, so its mechanical properties can only be judged indirectly through the ignition test of other products of the same batch, the structure of the product itself, and the quality of the charge. The unlocking function of the product is verified and tested

[0004] Secondly, the traditional pyrotechnic separation nut can only bear axial load, and other products such as shearing cone sleeves need to be designed to carry the shear load. Therefore, the connection interface between the separation nut and the separation body is relatively complicated, and in order to avoid affecting the separation nut Connecting and unlocking functions, the installation accuracy and design clearance of shear-bearing components such as shear cone sleeves have put forward higher requirements

[0005] In summary, the application of traditional pyrotechnic separation nuts in the field of star-arrow point connection unlocking has more and more restrictions, and there are disadvantages such as non-reusable, large impact of unlocking methods, only axial load, and undetectable.

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