Adjustable Spacer Valve Assembly for Quiet Airflow Control
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Solution Overview
Problem
Existing air valves, particularly venture air valves, face challenges in efficiently controlling the flow rate of air and reducing noise associated with airflow, which affects their operational efficiency and noise levels.
Innovation Solution
The proposed valve assembly incorporates a cone with serrations or projections on its outer edge to reduce noise, and an adjustable spacer that allows for tuning of the spring compression and cone position, enabling precise control over airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional air valve is used to control airflow, then the valve can regulate air flow rate, but it generates excessive noise during operation
Solution Approach 1:
The cone is provided with circumferential projections that create localized turbulence zones at specific positions around the airflow path. These projections are strategically positioned to break up laminar flow into controlled turbulence, reducing noise generation while maintaining overall airflow control efficiency. The local modification of flow characteristics at the projection locations achieves noise reduction without compromising the valve's primary airflow regulation function.
2Manufacturing precision
If the spring compression is increased to improve airflow control precision, then the cone position control improves, but the noise level increases
Solution Approach 1:
The circumferential projections on the cone create localized flow control zones that reduce noise generation. Even when the spring is compressed to achieve precise cone positioning, the projections continuously generate controlled turbulence that dampens noise. This allows the valve to maintain precise airflow control through spring compression while the projections mitigate the noise that would otherwise result from the compressed spring's rigid positioning.
3Object-affected harmful factors
If the valve components are made more complex to enable noise reduction features, then noise decreases, but the device complexity increases
Solution Approach 1:
The noise reduction is achieved by segmenting the cone surface into multiple circumferential projections rather than using a smooth surface. This segmentation creates multiple small turbulence zones that collectively reduce noise. The projections are simple geometric features that can be integrated into the existing cone manufacturing process, adding noise reduction functionality without requiring completely new valve components or complex assemblies.
4Manufacturing precision
If the adjustable spacer is added to enable precise tuning, then the airflow control precision improves, but the device complexity increases
Solution Approach 1:
The adjustable spacer provides dynamic tuning capability that allows the valve to be precisely adjusted for optimal airflow control. The spacer can be positioned at different locations along the valve body to change the effective spring compression and cone positioning. This dynamic adjustability enables precise airflow control for different applications while the modular spacer design keeps the added complexity manageable through a single adjustable component rather than multiple complex mechanisms.
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 valve assembly effectively reduces noise and provides precise control over airflow by adjusting the spring compression and cone position, enhancing the operational efficiency and quietness of the valve.
Implementation Method 1
a spring configured to bias the cone away from the constriction portion and positioned between a first piston fixed to the cone and a second piston fixed to the shaft
Implementation Method 2
an adjustable spacer positioned between a fixed position on the shaft and the second piston. The adjustable spacer is adjustable in length to change an effective length of the adjustable spacer and change a position of the second piston on the shaft
Implementation Method 3
a cone provided within the inlet portion and configured to move along the shaft; The cone includes an outwardmost radial periphery having a number of projections extending about the periphery
Data Source
AI summary
A valve assembly, includes a valve body having an inlet portion, an outlet portion, and a constriction portion; a shaft positioned within the valve body and extending along a longitudinal axis of the valve body; a cone provided within the inlet portion and configured to move along the shaft; a spring configured to bias the cone away from the constriction and positioned between a first piston fixed to the cone and a second piston fixed to the shaft; and an adjustable spacer positioned between a fixed position on the shaft and the second piston. The adjustable spacer is adjustable in length to change an effective length of the adjustable spacer and change a position of the second piston on the shaft.