Reversible Pyrotechnic Rupture Piece with Independent Fuse Positioning
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Solution Overview
Problem
Existing detonating pyrotechnic separation parts for space launch vehicles are not reversible and can only operate effectively in a specific direction, as the axial position of the pyrotechnic fuse is dependent on the relative positioning of the sections, affecting cutting performance in opposite directions.
Innovation Solution
The pyrotechnic separation part features a system where the pyrotechnic fuse is maintained independently of the anvil's position, using additional fixing means distributed along the sections to ensure the fuse's axial positioning and integration with one of the sections during rupture, allowing operation in any direction by decoupling the fuse's positioning from the sections' relative positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pyrotechnic fuse is positioned based on the relative positioning of sections, then the cutting performance is optimized for one direction, but the part cannot operate reliably in the opposite direction
Solution Approach 1:
The fuse positioning system is extracted from the section-relative positioning scheme and made independent through a dedicated positioning structure (shoulder or stop) within the channel. This allows the fuse to maintain a fixed axial position relative to the channel base regardless of section orientation, enabling reliable operation in both directions while preserving optimized cutting performance
Solution Approach 2:
The channel structure is designed to serve multiple functions: it contains the fuse, provides axial positioning through a shoulder or stop, and maintains the fuse at the correct altitude for cutting. This multi-functional design enables the same structure to support reliable operation in both upward and downward directions without requiring direction-specific configurations
2Adaptability or versatility
If additional fixing means are added to independently position the fuse, then the part becomes reversible and can operate in any direction, but the device complexity increases
Solution Approach 1:
The fuse positioning function is merged into the existing channel structure through an integrated shoulder or stop feature. This eliminates the need for separate, distributed fixing means while achieving the same effect of independent axial positioning. The positioning structure is formed as part of the channel itself, reducing overall device complexity while enabling reversibility
Solution Approach 2:
The channel structure serves itself by incorporating the positioning function directly into its geometry. The shoulder or stop is formed as an integral feature of the channel base, allowing the channel to automatically position the fuse without requiring additional external fixing components. This self-positioning mechanism enables reversibility while minimizing added complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables the pyrotechnic separation part to operate reversibly and maintain cutting performance regardless of the direction, ensuring reliable separation and integrity of components in various flight conditions.
Implementation Method 1
when said pyrotechnic fuse is ignited, it produces a detonation which breaks said first section at the channel
Data Source
AI summary
According to the invention, this piece comprises: a base section piece (1) provided with a projecting longitudinal heel (4) delimiting a longitudinal groove (7); a longitudinal pyrotechnic cord laid in said groove; and a plurality of consecutive section piece portions (2) fixed one after the other to said base section piece (1) by first fixing means (9). Between the consecutive section piece portions (2) are second fixing means (18), distributed along said base section piece (1) and independent of said first fixing means (9), enabling said pyrotechnic cord to be fixed and positioned relative to said base section piece (1).