Cask Cushioning Body Impact Absorber Design
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Solution Overview
Problem
Conventional cask cushioning bodies fail to adequately absorb impact during drops, leading to deformation of the steel housing, which can compromise the hermetically sealing performance by applying local loads on the cask's lid and surfaces, potentially exceeding permissible deformation limits.
Innovation Solution
A cask cushioning body design featuring end-surface and circumferential-surface side members made of steel, with impact absorbers positioned outside these members to absorb impacts without significant deformation, and reinforcing members to prevent positional deviation and maintain hermetic sealing, utilizing a combination of wood blocks and materials with varying compression strengths for effective impact distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the steel housing is used as the outer shell of the cushioning body to maintain structural integrity, then the housing strength is improved, but the housing deforms under impact and transfers local loads to the cask, compromising the hermetically sealing performance
Solution Approach 1:
The patent applies beforehand cushioning by placing impact absorbers (made of wood or other cushioning materials) between the steel housing and the cask before impact occurs. These impact absorbers are positioned at predetermined locations where impact forces are most likely to concentrate, such as between the housing and the lid or side surfaces of the cask. When impact occurs, these pre-positioned cushioning materials deform to absorb energy, preventing the steel housing from directly transferring local loads to the cask and thereby maintaining hermetic sealing performance.
2Loss of energy
If the impact absorber is positioned inside the steel housing to absorb impact, then the impact absorption is improved, but the housing deforms and abuts on the lid or side surface of the cask, transferring impact load
Solution Approach 1:
The patent employs an intermediary approach by introducing impact absorbers as mediating elements between the steel housing and the cask. These impact absorbers act as intermediaries that receive impact forces from the housing and dissipate them through controlled deformation, rather than allowing the forces to be directly transmitted to the cask. This intermediary layer ensures that the impact energy is absorbed without creating harmful local loads on the cask structure.
3Stability of the object's composition
If the housing is made rigid to prevent deformation, then the structural stability is improved, but the impact load is transferred directly to the cask, exceeding permissible deformation limits
Solution Approach 1:
The patent applies local quality by differentiating the mechanical properties of different parts of the cushioning body. The steel housing maintains high rigidity and stability for overall structural support, while localized impact absorbers made of more compliant materials (wood or other cushioning materials) are positioned at specific areas where impact forces concentrate. This local differentiation allows the housing to remain stable overall while permitting controlled local deformation at impact points, preventing excessive positional deviation of the lid and maintaining manufacturing precision.
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
The design significantly reduces local loads on the cask's surfaces and lid, maintains hermetic sealing by preventing excessive deformation and positional deviation, and effectively absorbs impacts in various drop scenarios, ensuring improved impact absorption performance.
Implementation Method 1
an impact absorber that absorbs the impact by deforming is provided outside of the end-surface side member and the circumferential-surface side member
Data Source
AI summary
A cask cushioning body includes an end-surface side member (2) in which a plurality of plates (21, 22) made of steel are formed at a distance between plate surfaces of the plates (21, 22) that face each other, and in which the plate surfaces of the plates (21, 22) are arranged along an end surface (100a) of a cask (100), and a circumferential-surface side member (3) that forms a cylindrical body (31) made of steel, one end of which is connected to a periphery of the end-surface side member (2), and that is arranged along an end-portion outer-circumferential surface (100b), wherein an impact absorber (4) that absorbs an impact by deforming is provided outside of the end-surface side member (2) and the circumferential-surface side member (3).