Stabilized Check Valve Clapper Interface for Chatter Reduction
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Solution Overview
Problem
Dynamic flow conditions in check valves lead to rapid opening and closing, causing chattering, vibrations, instability, and premature wear of components due to dynamic loads.
Innovation Solution
A check valve design featuring a hanger with a concave recess and a clapper with rounded surfaces forming a mated interface, increasing surface area and friction to stabilize the clapper's movement and reduce wear on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the check valve is designed with traditional components (flat surfaces, simple pin connection), then the device complexity is low and ease of manufacture is high, but the stability is poor and premature wear occurs due to dynamic loads causing chattering and vibrations
Solution Approach 1:
The patent applies curvature by replacing flat mating surfaces with rounded surfaces. The clapper includes a rounded surface extending from its top face, and the hanger includes a concave recess with a rounded surface. These curved surfaces form a mated interface that increases friction and stabilizes the clapper's movement, reducing chattering and vibrations caused by dynamic loads while maintaining reasonable structural complexity
Solution Approach 2:
The patent changes the friction parameter at the interface between the clapper and hanger by introducing rounded surfaces with increased contact area. This parameter change increases friction, which stabilizes the clapper's movement under dynamic loads and prevents premature wear of the pin and valve body, directly addressing the stability issue without significantly increasing device complexity
2Reliability
If the check valve operates under dynamic flow conditions, then the productivity is maintained, but the pin and valve body experience premature wear and damage due to vibrations and dynamic loads
Solution Approach 1:
The rounded surfaces on the clapper and hanger create a mated interface with increased friction, which stabilizes the clapper's movement and prevents excessive vibrations. This reduces the dynamic loads transmitted to the pin and valve body, thereby preventing premature wear and extending the lifespan of these components while maintaining reliable operation under dynamic flow conditions
Solution Approach 2:
By changing the friction parameter at the clapper-hanger interface through the rounded surface design, the patent reduces the transmission of dynamic loads to stationary components. This parameter modification protects the pin and valve body from wear and damage, extending their service life while ensuring continued reliability of the check valve under dynamic operating conditions
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 friction at the mated interface reduces the clapper's movement under dynamic loads, transferring stress away from the pin and reducing wear, thereby stabilizing the check valve and extending its lifespan.
Implementation Method 1
The first rounded surface and the concave recess are configured to form a mated interface when the clapper is in an open position... The increased friction at the mated interface reduces the clapper's movement under dynamic loads
Data Source
AI summary
In some implementations, a check valve may include a hanger configured in a valve body in a position that is approximately parallel to a direction of flow, wherein the hanger includes a first mating surface on a bottom face of the hanger. The check valve may include a clapper rotatably connected to the hanger, wherein the clapper is configured to rotate between a closed position and an open position, wherein the clapper includes a second mating surface on a top face of the clapper, and wherein the first mating surface and the second mating surface are configured to form a mated interface when the clapper is in the open position.