Deformable Missile Container Closure With Elastic Blade Sliding Mechanism
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Solution Overview
Problem
Deformable lids used in missile containers for sealing after use are imperfect, leading to inadequate closure and potential damage from high-pressure and high-temperature gases.
Innovation Solution
A deformable lid design featuring a grid and a stack of elastic strips sandwiched between thermal protection and sealing membranes, with intermediate sliding means made of heat-insulating materials like silicone or fiberglass mats, and a downstream support frame with a profiled inner edge to enhance deformation and reclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a deformable lid with elastic blades is used to enable opening under propulsion gases, then the lid can open during missile launch, but the sealing after use becomes imperfect
Solution Approach 1:
A sliding means is introduced as an intermediary element between the elastic blade and the downstream support frame. This sliding means comprises a first part attached to the elastic blade and a second part attached to the support frame, with a sliding interface between them that allows controlled movement while maintaining connection, thereby improving both opening and sealing functions
Solution Approach 2:
The elastic blade's thickness parameter is varied along its length, being greater at the root and decreasing towards the free end. This gradient in thickness optimizes the blade's flexibility and elastic return characteristics, enabling reliable sealing after deformation during launch
2Speed
If the elastic blades are made thin and flexible to enable deformation, then the lid can open easily, but the elastic return and sealing capability deteriorates
Solution Approach 1:
The elastic blade is designed with variable thickness along its length, with the thickness decreasing from the root to the free end. This parameter variation allows the blade to be thin and flexible at the free end for easy deformation while maintaining sufficient thickness at the root for strong elastic return and sealing capability
Solution Approach 2:
The lid structure combines multiple materials including the elastic blade material, the sliding means material, and the support frame material to achieve optimal mechanical properties. The composite structure allows different parts to have different flexibility and strength characteristics suited to their specific functions
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
Improves sealing efficiency by facilitating better elastic return and complete closure of the lid, preventing gas penetration and maintaining structural integrity.
Implementation Method 1
a stack of elastic strips, sandwiched between at least one thermal protection membrane and an upstream and downstream sealing membrane
Implementation Method 2
the cover comprises at least one intermediate sliding means arranged between two successive blades of the stack
Implementation Method 3
sandwiched between at least one thermal protection membrane and an upstream and downstream sealing membrane
Data Source
Figure 1~2
Figure 3~5
AI summary
The closure has elastic blades (63) whose grid (62) and stack are locked between a thermal protection membrane and an upstream and downstream sealed membrane, and are maintained between an upstream support frame (61) and a downstream support frame (64). Interposed sliding unit (67) is arranged between the two successive blades of the stack. Each blade is separated from an adjacent blade in a pile by the sliding unit.