Valve Damping Assembly Mitigating Impact Wear
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Solution Overview
Problem
Valves in cryogenic pumps experience wear due to impact loads, which is undesirable and leads to reduced durability and increased maintenance costs.
Innovation Solution
A damping assembly is introduced, featuring a damping chamber and a collar that receives the valve stem, with a liquid passageway defined by radial clearance between the collar head and the damping chamber sidewall, controlling the flow of liquid as the valve moves between open and closed positions, providing a damping effect to mitigate wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve is subjected to impact loads during actuation, then the valve can control flow effectively, but wear occurs between the valve and housing which reduces durability
Solution Approach 1:
A damping assembly is installed in the housing to provide cushioning before the valve element experiences impact loads. The damping assembly includes a damping chamber with viscous damping material that absorbs impact energy, reducing wear on the valve element and valve seat before damage can occur during normal actuation cycles.
Solution Approach 2:
The damping assembly acts as an intermediary component between the valve element and the housing. It mediates the impact loads by providing a damping chamber that contains viscous damping material, which absorbs and dissipates the impact energy, thereby protecting the valve from direct impact damage while maintaining effective flow control.
2Reliability
If a damping assembly is added to reduce wear, then durability is improved, but device complexity increases
Solution Approach 1:
The damping assembly is merged with the existing housing structure. The damping chamber is formed within the housing itself, and the damping material is contained within this chamber. This integration approach adds the damping function without requiring a completely separate complex assembly, thereby improving durability while minimizing the increase in device complexity.
Solution Approach 2:
The damping assembly is designed to serve multiple functions: it provides wear protection for the valve element, absorbs impact energy, and maintains proper valve positioning. By combining multiple functions into a single damping assembly component, the patent improves durability without proportionally increasing device complexity.
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 damping assembly effectively reduces wear on valve elements and seats, enhancing durability and reducing maintenance costs by controlling the movement and flow of liquids, thereby extending the life of the valves.
Implementation Method 1
The liquid passageway is defined by a radial clearance between the side surface of the collar head and the sidewall of the damping chamber. The liquid passageway is configured to control a flow of a liquid as the valve moves between the open position and the closed position, providing a damping effect to mitigate wear.
Data Source
AI summary
A damping assembly for a valve is provided. The valve is configured to move between an open position and a close position. The valve includes a valve element and a valve stem disposed within a head. The damping assembly includes a damping chamber defined within the head. The damping assembly defines a sidewall. The damping assembly also includes a collar configured to receive the valve stem. The collar includes a collar stem. The collar also includes a collar head having an outer diameter. The collar head includes a side surface. The damping assembly includes a liquid passageway. The liquid passageway is being defined by a radial clearance between the side surface of the collar head and the sidewall of the damping chamber. The liquid passageway is configured to control a flow of a liquid as the valve moves between the open position and the closed position.