High-Pressure Tank Liner Insert Ring Deformation Control
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Solution Overview
Problem
High-pressure tanks face durability issues due to repeated expansion and contraction of the liner caused by changing internal pressure, which can lead to damage and deterioration, especially when the liner material softens under high temperature and pressure.
Innovation Solution
A high-pressure tank design featuring a tubular insert ring harder than the liner, integrated with the liner to surround the opening, extending to the front side and mounted on the metal cap, which restricts excessive deformation and position change of the liner, thereby enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the liner body is made flexible to contain high-pressure liquid or gas, then the tank can withstand high pressure, but the liner expands and contracts repeatedly with temperature changes, reducing durability
Solution Approach 1:
The liner is divided into two distinct parts: a flexible liner body for containing pressure and a hard insert ring at the opening end. This segmentation allows the liner body to expand and contract with pressure changes while the rigid insert ring remains stable and prevents excessive deformation, thus resolving the contradiction between flexibility for pressure withstanding and stability for durability.
Solution Approach 2:
Different parts of the liner have different material properties: the liner body is made flexible to withstand pressure, while the insert ring at the opening end is made hard and rigid. This local differentiation of material quality allows each part to perform its specific function optimally - the flexible body handles pressure variations while the rigid ring prevents excessive expansion and contraction at the opening, improving overall durability.
2Reliability
If the liner body is made rigid to suppress expansion, then durability improves, but the tank cannot withstand high internal pressure
Solution Approach 1:
The liner is segmented into a flexible liner body and a rigid insert ring. The liner body maintains flexibility to withstand high pressure, while the insert ring provides rigidity to suppress excessive expansion. This segmentation resolves the contradiction by assigning different mechanical properties to different parts of the same component.
Solution Approach 2:
The insert ring at the opening end has different material properties (hard and rigid) compared to the liner body (flexible). This local quality differentiation allows the opening region to resist excessive expansion while the main body remains flexible enough to handle high internal pressure, thus resolving the contradiction between rigidity for durability and flexibility for pressure withstanding.
3Reliability
If the insert ring extends longer to better restrict liner deformation, then durability improves, but the complexity of assembly and integration increases
Solution Approach 1:
The insert ring is integrated with the liner body through merging - the insert ring is embedded into the liner body structure, forming a unified component. This integration simplifies assembly while maintaining the functional benefits of the extended insert ring for restricting liner deformation at the opening end.
Solution Approach 2:
The insert ring serves multiple functions: it restricts liner deformation, provides structural support at the opening end, and integrates with the liner body as a unified component. This multi-functionality reduces the need for additional separate components, thereby simplifying assembly while achieving improved durability.
Data Source
AI summary
A high-pressure tank includes: a liner having a hollow liner body, a metal cap, a sealing member, and a reinforcing portion. The hollow liner body has an opening in an end portion in an axial direction, and a tubular insert ring harder than the liner body and integrated with the liner body to surround the opening. The metal cap is inserted into the opening. The sealing member seals between the insert ring and the metal cap. The reinforcing portion covers an outer side of the liner, and the insert ring extends to a front side in the axial direction with respect to the liner body and is mounted on the metal cap.