Multi-Layered Vessel Walls for Easier Pressing and Strength

Solution Overview

Problem

Pressure vessels with a single layer, particularly those with non-circular shapes like rectangular shapes, face challenges in manufacturing large quantities due to high manufacturing costs, material thinning, and reduced strength when thickness is decreased to facilitate manufacturing, and adding internal structures compromises capacity and manufacturability.

Innovation Solution

A multi-layered vessel design comprising a sealed first vessel layer and a retaining layer configured to strengthen the walls, secured together through methods like welding or crimping, allowing for easier manufacturing and increased strength by dividing thick material into thinner layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the material thickness of the vessel is increased to 6 mm or greater, then the strength of the vessel is improved, but the ease of manufacture is worsened due to high pressing forces, increased tooling costs, and work hardening

Engineering Contradiction:

Improvevessel strengthVSAvoidpressing difficulty

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The vessel wall is divided into multiple layers (e.g., inner layer, middle layer, outer layer) with different thicknesses and functions. The inner layer provides leak tightness, while the middle and outer layers provide structural strength. This segmentation allows each layer to be optimized independently, avoiding the need for a single thick wall that is difficult to manufacture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The vessel uses a composite structure with multiple material layers, potentially including different steel grades or composite materials. This allows the vessel to achieve the required strength-to-weight ratio and manufacturing feasibility by combining materials with complementary properties rather than using a single thick material layer.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If the material thickness is decreased to facilitate pressing, then the ease of manufacture is improved, but the strength of the pressed vessel is decreased

Engineering Contradiction:

Improvepressing easeVSAvoidvessel strength

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The vessel wall is divided into multiple layers (e.g., inner layer, middle layer, outer layer) with different thicknesses and functions. The inner layer provides leak tightness, while the middle and outer layers provide structural strength. This segmentation allows each layer to be optimized independently, avoiding the need for a single thick wall that is difficult to manufacture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The vessel uses a composite structure with multiple material layers, potentially including different steel grades or composite materials. This allows the vessel to achieve the required strength-to-weight ratio and manufacturing feasibility by combining materials with complementary properties rather than using a single thick material layer.

Inventive Principle:

Principle #40Composite materials

3Strength

If internal structure or outer support structure is added to increase strength, then the vessel strength is improved, but the capacity and manufacturability are reduced

Engineering Contradiction:

Improvevessel strengthVSAvoidstructural complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The vessel wall is divided into multiple layers (e.g., inner layer, middle layer, outer layer) with different thicknesses and functions. The inner layer provides leak tightness, while the middle and outer layers provide structural strength. This segmentation allows each layer to be optimized independently, avoiding the need for a single thick wall that is difficult to manufacture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The vessel uses a composite structure with multiple material layers, potentially including different steel grades or composite materials. This allows the vessel to achieve the required strength-to-weight ratio and manufacturing feasibility by combining materials with complementary properties rather than using a single thick material layer.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20250290601A1Multi-layered vessel wall

Publication Date: 2025.09.18 BENNAMANN SERVICES LTD

AI summary

A multi-layered vessel may include a first vessel layer and a retaining vessel layer. The retaining vessel layer may be configured to strengthen the first vessel layer, and the retaining vessel layer may be secured to outer walls and/or inner walls of the first vessel layer. The first vessel layer alone (or with the retaining vessel layer and/or one or more additional retaining vessel layers) may form a sealed vessel.