Single-Piece Valve Cage With Lattice Slots for Cavitation Control
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Solution Overview
Problem
Conventional anti-cavitation and noise reduction devices for valve assemblies require complex manufacturing processes and are often constructed from multiple pieces, leading to inconsistencies and increased costs due to their complex shapes.
Innovation Solution
A single-piece anti-cavitation cage is developed using additive manufacturing techniques, such as powder bed fusion, which allows for the creation of a lattice structure within slots that can vary in density and orientation, enabling efficient flow management and noise attenuation while simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-piece anti-cavitation devices are used, then anti-cavitation protection is provided, but manufacturing complexity and costs increase
Solution Approach 1:
The patent combines multiple separate components (cage body, anti-cavitation elements, noise reduction features) into a single integrated additive manufactured component. This merging eliminates assembly complexity while maintaining all anti-cavitation and noise reduction functions, directly resolving the contradiction between reliability and manufacturing complexity.
Solution Approach 2:
The patent utilizes additive manufacturing to achieve complex geometries and internal lattice structures that are impossible with conventional manufacturing. By changing the manufacturing method from subtractive to additive processes, the device achieves high reliability anti-cavitation protection without increasing manufacturing complexity.
2Productivity
If complex shapes are used for anti-cavitation devices, then flow management and noise attenuation are improved, but manufacturing consistency deteriorates
Solution Approach 1:
The patent replaces complex mechanical manufacturing processes (investment casting, machining) with additive manufacturing technology. This substitution enables consistent reproduction of complex shapes and internal lattice structures, improving manufacturing precision and consistency while maintaining the flow management efficiency provided by the complex geometry.
Solution Approach 2:
By changing from conventional manufacturing to additive manufacturing, the patent achieves superior dimensional consistency and repeatability for complex geometries. The digital modeling and layer-by-layer fabrication process ensures that each component is manufactured with high precision, eliminating the variability inherent in multi-step conventional processes.
3Shape
If multiple pieces are used to construct the device, then complex geometries can be achieved, but assembly and installation time increase
Solution Approach 1:
The patent merges multiple components into a single monolithic structure manufactured via additive manufacturing. This eliminates all assembly steps required for multi-piece constructions, reducing installation time to zero while maintaining the complex geometries needed for anti-cavitation and noise reduction performance.
Solution Approach 2:
The patent uses internal lattice structures and slot configurations that segment the flow path within a single component. This provides the functional benefits of multiple pieces without the assembly complexity, as the segmentation is achieved through internal geometry rather than separate components.
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 single-piece design reduces manufacturing complexity and costs, enhances flow performance, and provides effective noise attenuation and anti-cavitation protection by managing pressure drops and flow characteristics through a single component construction.
Implementation Method 1
Generally, cavitation is the formation and subsequent collapse of vapor bubbles in liquid flow streams and is a major source of damage in control valves and adjacent piping
Implementation Method 2
During operation, various pressure drop patterns occur as fluid travels through the valve stages
Implementation Method 3
The orifices break up turbulent fluid streams, reducing noise-producing interactions
Data Source
AI summary
An anti-cavitation cage for a valve assembly. The anti-cavitation cage includes a body having a plurality of slots, a first end, and a second end. At least one slot of the plurality of slots includes an inside surface having a lattice structure. The lattice structure is one of uniform in grade through the at least one slot or a graded type of lattice structure varying in density from a first portion to a second portion. The anti-cavitation cage having these features is a single component.