Asymmetric V-shaped groove and double-point unlocking type rigid wrapping tape for interstage line type separation device

Abstract

The invention discloses an asymmetric V-shaped groove and double-point unlocking type rigid wrapping tape for an interstage line type separation device. The asymmetric V-shaped groove and double-pointunlocking type rigid wrapping tape for the interstage line type separation device is characterized by comprising a rigid wrapping tape, wrapping tape ends, an asymmetric V-shaped groove and bolt holes; the inner surface of the rigid wrapping tape is processed into the asymmetric V-shaped groove; the bolt holes are formed in the end heads of the wrapping tape ends; and the lower end surface wedge-shaped flange of an upper separating body is in butt joint with the upper end surface wedge-shaped flange of a lower separating body to form an asymmetric V-shaped flange which is embedded into the asymmetric V-shaped groove on the inner surface of the rigid wrapping tape, so that a connecting function is realized. Compared with the prior art at home and abroad, the rigid wrapping tape has the advantages of being high in reliability, simple and convenient to install, good in butt joint surface connection rigidity, uniform in distribution of end frame interface contact stress and pre-tighteningforce, high in ultimate bearing capacity and the like. Openings at the two sides of the rigid wrapping tape are large in a free state, after the pre-tightening force is applied, four free ends of therigid wrapping tape are tensioned, large elastic deformation occurs in the radial direction, quick separation function after unlocking is realized by utilizing the elastic deformation of the rigid wrapping tape, and the requirement of large-load large-diameter large-scale launching tasks in the future is met.

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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