Interstage separation device suitable for small-missile-diameter aircrafts

Abstract

The invention relates to an interstage separation device suitable for small-diameter aircrafts. The device is jointly composed of a connecting and unlocking device and an impulse separating device, and can be widely applied to the small-diameter aircrafts such as multi-stage rocket projectiles and multi-stage target projectiles. When an aircraft flies, connection and separation of a boosting stage and an upper stage are achieved through the interstage separation device. The connecting and unlocking device mainly comprises an upper-stage connecting cabin, a lower-stage connecting cabin, an unlocking top disc, steel balls, explosive bolts, ball pads and locking nuts; and the impulse separating device is mainly a cylindrical spring. When the aircraft flies in a whole rocket mode, the upper-stage connecting cabin is connected with the upper stage in a fastened mode, and the lower-stage connecting cabin is connected with the boosting stage in a fastened mode. The unlocking top disc radially supports the six steel balls in an upper-stage connecting locking hole and a V-shaped groove of the lower-stage connecting cabin, so that inter-stage axial limiting is realized; and a shear pin on the upper-stage connecting cabin is inserted into a radial limiting groove of the lower-stage connecting cabin, and interstage radial limiting is achieved. After the aircraft completes boosting flight at the boosting stage, the explosive bolts are detonated and separated, the unlocking top disc moves forwards under the action of the cylindrical spring, the steel ball radial support is relieved, the steel balls fall into an unlocking top disc groove, and the aircraft completes stage unlocking; and the cylindrical spring pushes the unlocking top disc to drive the upper-stage connecting cabin to continuously move until the upper-stage connecting cabin and the lower-stage connecting cabin are separated, and the aircraft achieves reliable interstage separation.

Description

technical field [0001] Disclosed is an inter-stage separation device suitable for small-diameter aircraft, which is composed of a connection unlocking device and a separation impulse device, applied to small-diameter aircraft such as multi-stage rockets and multi-stage target missiles, and belongs to the field of aircraft connection and separation. Background technique [0002] There are two main methods of separation between stages of an aircraft: hot separation and cold separation. Thermal separation means that the upper stage engine is started before separation, and the connection and separation device is unlocked. The upper stage relies on its engine thrust to accelerate, and at the same time, its gas flow acts on the lower stage. The pressure of the gas flow and aerodynamic resistance decelerate the lower stage to achieve two-stage separation. . Cold separation means that when the thrust of the lower stage has basically disappeared and the upper stage engine has not st...

AI Technical Summary

Problems solved by technology

The separation impact load of the cold separation method is small, and the interstage section is short, but the separation impulse required is large and the separation time is long

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