Removable Valve Cage Insert for Noise Reduction Without Flow Loss
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Solution Overview
Problem
Existing valve designs face challenges with noise reduction and cavitation, as smaller openings in the cage walls can clog easily, leading to reduced flow capacity and ineffective noise attenuation, while larger openings compromise noise reduction effectiveness.
Innovation Solution
A valve design featuring a removable insert with a lattice structure between the inner and outer cage walls, allowing for smaller openings that reduce noise and cavitation, which can be easily cleaned and replaced, while the cage walls have larger openings to prevent clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If smaller openings are used in the cage walls to reduce noise and cavitation, then noise attenuation is improved, but the openings clog easily leading to reduced flow capacity
Solution Approach 1:
The cage structure is segmented into three distinct components: an inner wall with larger openings, an outer wall with larger openings, and a removable insert with smaller openings placed between them. This segmentation allows each component to serve different functions - the inner and outer walls maintain flow capacity with larger openings, while the insert provides noise attenuation with smaller openings that can be removed for cleaning
Solution Approach 2:
The removable insert acts as an intermediary element positioned between the inner and outer cage walls. It provides the noise reduction function through its smaller openings while being easily removable for maintenance, thus mediating between the conflicting requirements of noise attenuation and flow capacity maintenance
2Object-affected harmful factors
If smaller openings are used in the cage walls to reduce noise, then noise reduction effectiveness is improved, but maintenance becomes difficult as the entire valve must be disassembled
Solution Approach 1:
The cage is divided into separable components including the inner wall, outer wall, and a removable insert. The insert containing the smaller noise-reducing openings can be independently removed from the cage assembly, allowing maintenance personnel to access and clean the small openings without disassembling the entire valve
Solution Approach 2:
The removable insert serves as an accessible intermediary component that houses the noise reduction features. Its design as a separate, easily removable element provides maintenance access to the small openings while maintaining the noise reduction functionality when installed
3Quantity of substance
If larger openings are used in the cage walls to prevent clogging, then flow capacity is maintained, but noise reduction effectiveness is compromised
Solution Approach 1:
The cage structure segments the opening functions by placing larger openings in the inner and outer walls for flow capacity, while positioning a separate insert with smaller openings for noise reduction. This segmentation allows both large and small openings to coexist without interfering with each other's functions
Solution Approach 2:
Different parts of the cage structure have different opening sizes optimized for different functions: the inner and outer walls have larger openings locally optimized for flow capacity, while the insert has smaller openings locally optimized for noise reduction. Each location has the quality it needs for its specific function
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 solution effectively reduces noise and cavitation while maintaining flow capacity, as the insert can be easily maintained without disassembling the entire valve, and the larger cage openings reduce manufacturing costs and time.
Implementation Method 1
The cage may be used to reduce capacity flow, attenuate noise and/or reduce or eliminate cavitation
Data Source
AI summary
Apparatus for noise reduction in valves are disclosed herein. An example valve disclosed herein includes a valve body defining a fluid passageway between an inlet and an outlet, a plug, and a cage in the fluid passageway. The plug is disposed in the cage. The plug is moveable in the cage to control fluid flow through the fluid passageway. The cage includes an inner wall having first openings, an outer wall having second openings, the outer wall disposed coaxially around the inner wall, and an insert having third openings. The insert is disposed between the inner wall and the outer wall.