An asymmetric v-groove, two-point unlocking rigid strap for inter-stage line separation

Abstract

An asymmetrical V-groove, two-point unlocking type rigid tape for inter-stage line separation device, its features include rigid tape, tape end, asymmetrical V-groove, bolt holes; rigid tape The inner surface is processed into an asymmetric V-shaped groove; the tape ends are provided with bolt holes; the wedge-shaped flange on the lower end of the upper separation body and the wedge-shaped flange on the upper end of the lower separation body are butted to form an asymmetric V-shaped flange embedded in the rigid The asymmetric V-shaped groove on the inner surface of the tape realizes the connection function. Compared with the existing technology at home and abroad, the rigid tape of the present invention has the advantages of high reliability, simple and convenient installation, good connection stiffness of the butt joint surface, uniform distribution of contact stress and pretightening force at the end frame interface, and strong ultimate bearing capacity. The rigid tape has large openings on both sides in the free state. After the pre-tightening force is applied, the four free ends of the rigid tape are tightened, and a large elastic deformation occurs in the radial direction. The elastic deformation of the rigid tape itself is used to realize The quick release function after unlocking can meet the needs of large-scale launch missions with large payloads and large diameters in the future.

Description

technical field [0001] The invention relates to the technical field of launch vehicle payload separation structures, in particular to an asymmetrical V-groove and double-point unlocking rigid strap used for a payload separation device. Background technique [0002] Payload separation is the last link of the entire launch vehicle launch mission, and it is one of the most critical links, which directly affects the success or failure of the launch mission. According to the connection form of the payload separation device, it includes a point separation device and a line separation device. The point separation device mainly includes explosive bolts and separation nut devices, and the line separation device mainly refers to the tape separation device. Compared with the point separation device, the tape separation device has the advantages of high reliability, good connection stiffness, and strong bearing capacity, and is currently the most widely used payload separation device a...

AI Technical Summary

Problems solved by technology

The tape installation of the flexible tape separation device requires a large axial installation space, and it is difficult to use it under the condition of limited space; in addition, the tape itself is relatively flexible, resulting in a relatively tight constraint on the tape by the tension spring and the limit spring. Poor, the radial dynamic envelope of the unlocking movement is relatively large; at the same time, the rigidity of the tape itself is relatively weak, and the risk of the V-shaped block detaching from the end frame is greater under the condition of a large tensile load; For bolts, the unlocking time is too fast (less than 1ms), resulting in too fast release of the pre-tightening force, resulting in a large separation impact; rigid strapping can effectively solve the above problems

At present, there are related reports on the integral rigid tape, although the integral rigid tape solves the shortcomings of the flexible tape, such as low load-bearing efficiency, large separation impact, low uniformity of pre-tightening force, and poor operation convenience.

However, the integral rigid tape also has some shortcomings, such as the uneven stress distribution of the integral rigid tape, the uneven contact stress distribution of the end frame interface after fully preloaded, and the low ultimate bearing capacity.

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