Pressure Vessel Nozzle Sleeve Grooves for Resin Impregnation
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Solution Overview
Problem
Existing pressure vessels, particularly curved pipe vessels, face challenges in securing structural performance at the nozzle part due to incomplete resin impregnation, which occurs when the swaging process blocks the resin flow path, leading to inadequate load transfer between reinforced fibers.
Innovation Solution
A pressure vessel design featuring a nozzle part with an inner sleeve having a flow path groove and an outer sleeve with fixing protrusions, along with a reinforcement ring and sealing member, ensures complete resin impregnation by facilitating resin movement through alternate flow paths and enhancing load transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sleeve is mounted by the swaging method, then the sleeve is closely mounted on the tube, but the flow path of the resin is blocked by the protrusion formed on the sleeve
Solution Approach 1:
The sleeve is divided into multiple sections along its length, with groove portions removed to create open spaces. This segmentation allows resin to flow through the sleeve structure rather than being blocked, while the sleeve still provides structural support when compressed by the swaging method.
Solution Approach 2:
The groove portions in the sleeve act as intermediaries that facilitate resin flow between the inner and outer surfaces of the fiber-reinforced layer. These grooves create channels that guide resin movement, ensuring complete impregnation without requiring the resin to pass through the solid sleeve material.
2Reliability
If the reinforced fiber layer is sufficiently impregnated with resin, then structural performance is secured, but the protrusion on the sleeve blocks resin flow path
Solution Approach 1:
The sleeve structure is segmented with groove portions removed to create flow channels. This allows resin to penetrate the fiber-reinforced layer completely without being blocked by the sleeve, ensuring sufficient impregnation for reliable load transfer while maintaining the sleeve's structural function.
Solution Approach 2:
The sleeve has different local properties: solid portions provide structural support and compression, while groove portions provide resin flow paths. This local differentiation allows the same component to simultaneously maintain structural integrity and facilitate complete resin impregnation.
3Strength
If a protrusion is formed on the sleeve for preventing separation, then the sleeve is securely fixed, but incomplete resin impregnation occurs in the fiber-reinforced layer
Solution Approach 1:
The sleeve is segmented with groove portions that extend through its thickness, creating channels for resin flow. The remaining solid portions of the sleeve maintain the protrusion structure for secure fixation, while the grooves ensure complete resin impregnation by providing unobstructed flow paths.
Solution Approach 2:
The groove portions create three-dimensional flow channels within the sleeve structure, allowing resin to access the fiber-reinforced layer from multiple directions rather than being constrained to a single blocked path.
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 improves structural performance by ensuring thorough resin impregnation and stable load transfer, preventing damage and maintaining structural integrity under high pressure.
Implementation Method 1
an inner sleeve inserted between the outer surface of the liner and an inner surface of the fiber-reinforced layer and having a flow path groove formed to extend in an extension direction of the liner
Implementation Method 2
an outer sleeve provided to surround an outer surface of the fiber-reinforced layer and having a plurality of fixing protrusions protruding from an inner surface toward the fiber-reinforced layer
Implementation Method 3
The sleeve is plastically deformed through a swaging process or the like and is closely mounted on the outside of the tube
Implementation Method 4
impregnating the reinforced fiber layer with a polymer resin, and then curing the impregnated reinforced fiber layer
Data Source
AI summary
A pressure vessel includes a vessel part including a liner and a fiber-reinforced layer formed to surround an outer surface of the liner, and a nozzle part provided at an end of the vessel part, wherein the nozzle part includes a nipple having at least a portion inserted into the liner, and an inner sleeve inserted between the outer surface of the liner and an inner surface of the fiber-reinforced layer and having a flow path groove formed to extend in an extension direction of the liner.