Fuel Tank Anchorage Structure Against Parison Deformation
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Solution Overview
Problem
The strength of anchorage between a fuel tank's tank body and built-in components is compromised by external pressure and temperature fluctuations, necessitating an enhancement in the anchorage mechanism.
Innovation Solution
A fuel tank design featuring a built-in component with a head, neck, and shoulder portion, where the neck portion is covered by a parison during molding, and a deformation prevention structure, such as a stepped portion, is integrated on the shoulder portion to prevent parison deformation due to pressure, thereby increasing the anchorage strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the parison is wrapped around the neck portion during molding to anchor the built-in component, then the anchorage strength is improved, but the parison may deform due to external pressure and temperature fluctuations
Solution Approach 1:
The deformation prevention structure is pre-formed on the shoulder portion before the parison wrapping process. This preliminary structural feature guides and constrains the parison during molding, preventing deformation before it occurs while maintaining anchorage strength.
Solution Approach 2:
The deformation prevention structure creates a localized region with different geometric properties on the shoulder portion. This local structural modification provides targeted support to the parison wrapping area without affecting other parts of the tank body, resolving the contradiction between anchorage and shape stability.
2Reliability
If external pressure acts on the tank body due to air temperature changes, then the tank body experiences stress, but the parison wrapping may deform reducing anchorage effectiveness
Solution Approach 1:
The deformation prevention structure provides preliminary counter-action to external pressure by creating a rigid geometric feature that resists compressive forces. This structure preemptively opposes the harmful effect of external pressure on the parison wrapping, maintaining anchorage reliability under temperature-induced stress.
Solution Approach 2:
The deformation prevention structure acts as a protective feature that cushions the parison wrapping against external pressure. By providing this structural buffer beforehand, the system protects the anchorage mechanism from deformation caused by temperature fluctuations and external pressure.
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 deformation prevention structure effectively maintains the parison's shape around the neck portion, enhancing the anchorage strength between the tank body and the built-in component, ensuring a more secure attachment.
Implementation Method 1
air blown from outside during molding to shape a parison along the neck portion
Implementation Method 2
configured to prevent a wrapping parison portion wrapped around the neck portion from being deformed due to pressure acting on the tank body
Data Source
AI summary
A fuel tank has a built-in component with a head portion, a neck portion, and a shoulder portion, and has the built-in component anchored to a tank body with a parison wrapped around the neck portion during molding. The fuel tank includes a deformation prevention structure configured to prevent a wrapping parison portion wrapped around the neck portion from being deformed due to pressure acting on the tank body. The deformation prevention structure is configured to include one of a stepped portion provided in the shoulder portion, a convex portion, and a recess.