Ceramic Sphere Fluid Control Valve for Fretting Wear Reduction
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Solution Overview
Problem
Conventional fluid control valves experience fretting wear and diaphragm member breakage due to high friction between metal components, leading to reduced valve life and increased costs.
Innovation Solution
The fluid control valve incorporates a ceramic sphere instead of a metal sphere, reducing friction and eliminating the need for coatings like fluorine, thus maintaining an inexpensive configuration while prolonging valve life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a metal sphere with fluorine coating is used to reduce friction, then the friction between diaphragm member and sphere is reduced, but the fluorine coating peels off due to fretting wear, causing diaphragm member breakage and reducing valve life
Solution Approach 1:
The patent changes the material parameter of the sphere from metal to ceramic material. This fundamental material parameter change eliminates the need for fluorine coating while maintaining low friction characteristics, thereby preventing coating peeling and diaphragm member breakage, and extending valve life.
2Reliability
If a coating with high hardness is applied to the sphere, then the life of the fluid control valve is prolonged, but the fluid control valve becomes expensive
Solution Approach 1:
The patent changes the base material parameter from metal to ceramic, which inherently provides high hardness and wear resistance. This eliminates the need for additional coating processes, thereby prolonging valve life while keeping the manufacturing cost low.
Solution Approach 2:
The patent uses a ceramic sphere that is inherently durable without requiring expensive protective coatings. The ceramic material itself provides the necessary wear resistance, avoiding the cost of high-hardness coating applications.
3Ease of operation
If a fluorine coating is applied to the sphere, then the friction coefficient is reduced and life is prolonged, but the coating peels off due to fretting wear, causing repeated high-friction contact
Solution Approach 1:
The patent changes the material parameter from metal to ceramic, which inherently provides low friction characteristics without requiring fluorine coating. This eliminates the coating peeling problem while maintaining low friction contact throughout the valve's operational life.
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 use of a ceramic sphere in the fluid control valve significantly prolongs the valve's life by reducing friction and preventing diaphragm member breakage, while maintaining an economical configuration.
Implementation Method 1
because the ceramic material has a friction coefficient smaller than that of metal such as stainless steel
Data Source
AI summary
In order to configure a fluid control valve to have the life prolonged while keeping an inexpensive configuration, the fluid control valve includes: a valve body that can come into contact and separate from a valve seat; an actuator that causes the valve body to move; a diaphragm member provided between the valve body and the actuator and having a protruding part protruding toward the valve body; and a sphere housed inside the protruding part, in which the actuator moves the valve body by pressing a distal end of the protruding part through the sphere, and the sphere is formed of a ceramic material.