Fusible Wire Clamping Mechanism for Corrosion-Resistant Force Release
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Solution Overview
Problem
Existing devices for releasing large forces in space applications have complex assembly processes and are vulnerable to environmental corrosion, especially when using fusible wires exposed to harsh conditions.
Innovation Solution
A device with a contacting mechanism that adjusts clamping force on a fusible wire using a clamp surrounding the base body, providing insulation and protection from corrosive media, allowing for simple assembly and reliable operation under extreme conditions, and featuring a safety bolt and lever system for controlled force release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fusible wire is exposed to enable simple assembly and connection, then the assembly process is simplified, but the wire becomes vulnerable to environmental corrosion and inoperative triggering
Solution Approach 1:
The fusible wire is nested within the protective tube, which is inserted into the base body. This nested structure protects the wire from environmental corrosion while maintaining simple assembly through the tube's insertion design rather than complex threading.
Solution Approach 2:
The protective tube acts as an intermediary between the fusible wire and the corrosive environment. It provides electrical insulation and physical protection while allowing the wire to maintain its triggering function through the tube wall.
2Reliability
If the fusible wire is threaded into protective tubes, then protection from environmental influences is achieved, but the assembly process becomes time-consuming and requires high skill level
Solution Approach 1:
The protective tube is designed to be inserted into the base body rather than threaded, creating a nested structure that simplifies assembly. The tube contains the fusible wire and is positioned within the base body's recess, eliminating complex threading operations.
Solution Approach 2:
The protective function is extracted into a separate tube component that can be independently manufactured and then simply inserted into the base body, separating the protection function from the complex assembly process.
3Force
If a segmented cylinder with multiple components is used to restrain large forces, then the force restraint capability is achieved, but the assembly process becomes very complex
Solution Approach 1:
The protective tube combines multiple functions into a single component: it protects the fusible wire from corrosion, provides electrical insulation, and serves as a structural element within the base body. This merging reduces the total number of components while maintaining force restraint capability.
Solution Approach 2:
The base body serves multiple functions simultaneously: it provides structural support, contains the protective tube, anchors the winding, and guides the safety bolt. This multi-functionality reduces the need for separate specialized components.
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 safe and efficient release of large forces with a compact, easy-to-assemble design that protects the fusible wire from environmental influences and ensures reliable operation, even in corrosive environments, by adjusting clamping force and using redundant circuit connections for secure triggering.
Implementation Method 1
If a current impulse is now introduced into the fuse wire by the external circuit, it melts
Implementation Method 2
the clamping force of the contacting device exerted on the melting wire can be adjusted via a clamp that at least partially encompasses the base body
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A device for converting an electrical signal into a mechanical movement, in particular for triggering a force-resistant release device, is described, comprising at least one contacting device arranged in a base body (1) and clamping a fusible link (4), wherein a locking bolt (5) is fixed in a locking position by the fusible link (4). To ensure that such a device can be reliably operated despite its simple, compact design and assembly, even after prolonged exposure to extreme environmental conditions, it is proposed that the clamping force exerted on the fusible link (4) by the contacting device be adjustable via a clamp (7) that at least partially encompasses the base body (1).