Check Valve Damper Chamber Layout for Chattering Suppression
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Solution Overview
Problem
Conventional check valves experience chattering due to insufficient damping force, which is limited by the small volume and diameter of the damper chamber, leading to ineffective attenuation of the valve element's axial moving force.
Innovation Solution
A check valve design with a biasing member in the valve chest and a large-diameter damper chamber, communicating through a space between the valve element and guide portion, enhances damping force by increasing the volume and diameter of the damper chamber, effectively suppressing chattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the spring is incorporated in the damper chamber to prevent pressure loss increase, then the spring can be accommodated, but the volume of the damper chamber increases, reducing damping force
Solution Approach 1:
The spring (biasing member) is extracted from the damper chamber and relocated to the valve chest. This separation allows the damper chamber to maintain a small volume for effective damping while the spring occupies space in the valve chest, eliminating the trade-off between spring accommodation and damping chamber volume.
2Force
If the damper chamber diameter is increased to increase damping force, then damping force increases, but the damper chamber volume increases, which is undesirable
Solution Approach 1:
The damper chamber is positioned radially adjacent to the valve chest rather than axially within it. This spatial reconfiguration allows the damper chamber to have a larger effective diameter for increased damping force while occupying radial space rather than axial space, maintaining compact overall dimensions.
3Force
If the damper chamber volume is decreased to increase damping force, then damping force increases, but the spring cannot be accommodated
Solution Approach 1:
The spring is extracted from the damper chamber and placed in the valve chest, resolving the conflict between small damper chamber volume (for high damping force) and spring accommodation. The spring and damper chamber are spatially separated into different regions.
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 increased damping force effectively attenuates the axial moving force of the valve element, reducing chattering and improving the durability of the check valve components by minimizing collisions and vibrations.
Implementation Method 1
a damper chamber communicating with the valve chest through a space between the valve element and the guide portion, the damper chamber being configured to attenuate axial moving force of the valve element
Implementation Method 2
a biasing member configured to push the valve element toward the seat portion
Data Source
AI summary
There is provided a check valve capable of effectively suppressing the generation of chattering. The check valve includes: a housing including an inlet channel, a valve chest, and an outlet channel; a seat member provided around the inlet channel, the seat member including a seat portion; a valve element pressed against the seat portion to close the inlet channel; a biasing member configured to push the valve element toward a valve seat; a guide portion provided at the housing and configured to guide the valve element when the valve element moves in an axial direction; and a damper chamber communicating with the valve chest through a space between the valve element and the guide portion, the damper chamber being configured to attenuate axial moving force of the valve element. The biasing member is arranged in the valve chest.