Thermal Deformation Linear Separation Device for Space Launchers
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Solution Overview
Problem
Existing linear separation devices for mechanically linked assemblies, such as space launchers and missiles, often cause significant shock waves due to pyrotechnic ruptures, which can damage the launcher and payload, and existing soft mechanical separations are not linearly applicable.
Innovation Solution
A device with a linear heat source applied along a line to thermally deform a first part bonded to a second part, using a heat source housed in a thermally insulated cavity, allowing for controlled separation along a linear connection, such as between a part of revolution and a cylinder, with the heat source being a high-calorific composition like Thermite.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pyrotechnic rupture is used for linear separation, then separation speed is improved, but harmful shock waves are generated
Solution Approach 1:
The patent replaces the pyrotechnic rupture mechanism (chemical energy release) with a thermal deformation mechanism (heat application). The heat source applies localized thermal energy to the separation zone, causing controlled thermal expansion and deformation of the material that breaks the mechanical connection. This substitution eliminates the violent shock waves characteristic of pyrotechnic methods while achieving separation.
Solution Approach 2:
The patent changes the physical parameters of the separation process by using controlled thermal parameters (temperature, heat distribution) instead of chemical explosion parameters. The heat source is designed to create a specific temperature gradient in the separation zone, causing localized thermal expansion that generates sufficient force for separation without the harmful effects of combustion.
2Object-generated harmful factors
If soft mechanical separation is used, then harmful shock waves are minimized, but linear separation capability is lost
Solution Approach 1:
The patent segments the heat application into a distributed linear array of heating elements along the separation interface, rather than a single point source. This linear segmentation of the thermal field allows the device to maintain compatibility with linear mechanical connections while avoiding concentrated shock waves. Each segment of the heat source contributes to the overall thermal deformation along the separation line.
3Object-generated harmful factors
If thermal deformation is used for separation, then shock waves are reduced, but separation time increases
Solution Approach 1:
The patent employs periodic or pulsed heating action rather than continuous heating. The heat source is activated in controlled pulses that accumulate thermal energy in the separation zone, causing progressive thermal deformation. This periodic action allows efficient heat transfer and material response while maintaining relatively short overall separation time, bridging the gap between gentle separation and rapid separation requirements.
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
Enables gentle and rapid linear separation of stages in less than 10 seconds, minimizing impact on the launcher and payload by directing heat flow to achieve separation without violent shock waves, suitable for space launchers, space probes, and satellites.
Implementation Method 1
a heat source applied to the first part which applies a thermal stimulus to the first part, so as to separate the first part from the second part by thermal deformation of the first part
Implementation Method 2
the heat source is placed in a gas-tight cavity having sides having thermal insulation on at least two sides of the cavity
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a device (12) for linear separation of a first part (2) and a second part (4). The first part is linearly connected to the second part (4). The device comprises a heat source (12) applied to the first part (2), which applies a heat stimulus to the first part (2) such as to separate the first part (2) from the second part (4) by thermal deformation of the first part (2).