Process Control Noise Attenuator Plate Support Against Bending
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Solution Overview
Problem
Existing noise attenuators for process control devices, such as pressure regulators, often fail to effectively reduce high noise levels above 85 decibels due to bending and deformation of plates under pressure, leading to reduced noise attenuation and potential damage from dislodged springs.
Innovation Solution
The use of additional support rods coupled between plates, offset from the central support rod, to distribute load and prevent bending, combined with curved plates that engage with the passageway wall to maintain position, enhances structural integrity and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single central support rod is used to support plates in a noise attenuator, then the device complexity is reduced, but the plates bend and deform under pressure causing reduced noise attenuation
Solution Approach 1:
The single central support rod is segmented into multiple support rods (first support rod along central axis, second support rod offset from central axis). This segmentation distributes the load across multiple points, preventing plate bending and deformation while maintaining noise attenuation effectiveness below 85 decibels.
Solution Approach 2:
Different regions of the plate are supported at different locations - the first support rod supports the plate at its center along the central axis, while the second support rod supports the plate at an offset location. This local quality approach ensures uniform stress distribution across the plate surface, preventing deformation.
2Object-affected harmful factors
If plates are spaced apart in the fluid passageway to reduce noise, then noise attenuation is improved, but the structural integrity under pressure decreases
Solution Approach 1:
The support structure transitions from a single-dimensional central axis support to a two-dimensional support arrangement with rods positioned both on and offset from the central axis. This dimensional expansion creates a more robust support framework that maintains plate strength while allowing necessary spacing for noise attenuation.
3Strength
If multiple support rods are added to prevent plate bending, then the structural integrity is improved, but the device complexity increases
Solution Approach 1:
The support rod arrangement uses asymmetric positioning - one rod on the central axis and another offset from it. This asymmetric configuration provides effective structural support preventing plate bending while using the minimum necessary number of rods, avoiding excessive complexity.
Data Source
AI summary
Example noise attenuators for use with process control devices are described herein. An example apparatus includes a first plate and a second plate disposed in a fluid passageway of a noise attenuator. The second plate is spaced apart from the first plate. The example apparatus also includes a first support rod extending along a central axis of the fluid passageway. The first support rod is coupled to the first plate and to the second plate. The example apparatus further includes a second support rod extending along an axis parallel to and offset from the central axis. The second support rod is coupled to the first plate and the second plate.