Annular Piston Valve Turbulators for Noise and Cavitation Reduction
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Solution Overview
Problem
Existing needle valves experience noise and cavitation due to jet contraction at the valve outlet, leading to inefficient flow guidance.
Innovation Solution
The introduction of turbulators on the inner guide part of the housing to swirl the medium flow, generating vortices and reducing noise generation by improving flow separation and deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the housing is designed to achieve a directed and straight flow from the valve inlet to the valve outlet, then the flow path is simplified and manufacturing is easier, but jet contraction occurs at the valve outlet leading to noise and cavitation
Solution Approach 1:
The patent changes the geometric parameters of the flow path by introducing turbulators that create vortices. These vortices modify the flow characteristics, transforming the straight flow into a swirling flow pattern that prevents jet contraction at the outlet, thereby reducing noise and cavitation while maintaining manufacturing simplicity
Solution Approach 2:
The turbulators act as an intermediary element between the straight flow path and the outlet. They introduce controlled turbulence and vortices that mediate the flow transition, preventing direct jet contraction while maintaining the overall simplicity of the housing design
2Object-affected harmful factors
If turbulators are added to swirl the medium flow and generate vortices, then flow guidance is improved and noise is reduced, but the device complexity increases
Solution Approach 1:
The turbulators are introduced only in specific locations where flow control is needed, rather than modifying the entire housing structure. This localized approach improves flow guidance and reduces noise without significantly increasing overall device complexity
Solution Approach 2:
The housing is segmented into functional zones: a straight flow path section for simplicity, and a turbulence generation section with turbulators for flow control. This segmentation allows each section to perform its specific function optimally without compromising the other
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
Enhances flow guidance by reducing noise and cavitation, improving flow control and efficiency.
Implementation Method 1
The turbulators generate vortices that add kinetic energy to the flow and reduce flow separation at the valve seat
Implementation Method 2
the turbulators generate a wake that facilitates the deflection of the medium from the housing to the pipeline and reduces noise generation
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to a ring piston valve with a housing (1), an annular channel (8) formed between an outer part (3) and an inner guide part (5) of the housing (1) for guiding a medium between an inlet opening (9) and an outlet opening (10) of the housing (1), a closing piston (15) guided axially displaceably within the inner guide part (5) of the housing (1), and an adjusting device actuatable from the outside of the housing (1) by means of a drive shaft (7), via which adjusting device the closing piston (15) can be axially moved between an open position and a closed position by rotating the drive shaft. According to the invention, turbulators (30) for swirling the medium flowing through the annular channel (8) are arranged on the outside of the inner guide part (5) of the housing (1).