Composite Ring Valve Shutter for Wear and Thermal Stability
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Solution Overview
Problem
Automatic ring valves in reciprocating compressors face challenges with high-speed opening and closing cycles, leading to wear and tear, and sensitivity to temperature changes due to the materials used, which affect their durability and efficiency.
Innovation Solution
The automatic ring valve system incorporates a shutter with a structural core made of fiber-reinforced synthetic polymeric resin, enhanced by a primary layer for impact and fracture resistance and an external layer for wear resistance, featuring continuous fibers that reduce thermal expansion and improve buckling strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the shutter is made of fiber-reinforced synthetic polymeric resin to reduce mass and inertia, then the opening and closing speed is improved, but the wear resistance and fracture toughness deteriorate
Solution Approach 1:
The shutter is constructed as a composite structure combining fiber-reinforced synthetic polymeric resin (for low mass and high speed) with metal layers (for wear resistance and fracture toughness). This multi-material composite approach allows the shutter to simultaneously achieve high opening/closing speed through its lightweight polymer core while maintaining durability through the protective metal surface layers.
2Weight of moving object
If the shutter is made of composite material to reduce mass, then the inertia is reduced, but the durability under high-speed repeated strokes deteriorates
Solution Approach 1:
The shutter employs a composite structure where the fiber-reinforced polymeric resin provides low mass for reduced inertia, while the additional metal layers (such as tungsten carbide or stellite) provide enhanced durability and resistance to repeated high-speed strokes. This composite construction allows the shutter to maintain both lightweight characteristics and high reliability under intensive operational conditions.
3Ease of manufacture
If the shutter material is sensitive to temperature changes, then the manufacturing is simplified, but the operational reliability deteriorates
Solution Approach 1:
The invention addresses temperature sensitivity by carefully selecting polymeric resin materials with appropriate thermal expansion coefficients and glass transition temperatures that match the operational temperature range. The fiber reinforcement and metal layers further stabilize the thermal properties, allowing the shutter to maintain dimensional stability and operational reliability across temperature variations while remaining manufacturable through conventional composite processing techniques.
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
This configuration enhances the durability and toughness of the shutter, reducing wear and temperature sensitivity, thereby improving the valve's operational reliability and efficiency.
Implementation Method 1
Compression springs are provided between the valve guard and each shutter ring to oppose the movement of the shutter ring from the closed position
Implementation Method 2
continuous fibers that reduce thermal expansion and improve buckling strength
Data Source
AI summary
An automatic ring valve 10 comprising a valve seat 12 provided with a plurality of gas flow passages 14 arranged according to at least one annular row, at least a shutter 18 comprising at least one ring-shaped portion for selectively closing and opening the gas flow passages 14, wherein said ring-shaped portion of the shutter 18 comprises a fiber-reinforced matrix 40, at least one contrasting member for contrasting an opening movement of ring-shaped portion of the shutter 18, wherein said ring-shaped portion of the shutter 18 comprises a structural core 18A made by said fiber-reinforced matrix 40, and wherein at least a portion of said structural core 18A is covered by at least one primary layer 18B, designed to improve fracture and/or impact and/or wear resistance of said ring-shaped portion.