Control Valve Passage Channel Curvature Reduces Noise
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Solution Overview
Problem
Existing ball valves generate cavitation and noise due to turbulence, which is undesirable in certain applications, despite previous attempts to reduce noise through various designs such as deflectors and specific geometries.
Innovation Solution
A control valve with a spherical closing element that rotates between two positions, featuring a passage channel with an inlet opening designed as a curved slot and an outlet opening with a crescent-shaped partial area, ensuring a smooth transition without steps or edges, reducing turbulence and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional ball valve with a through-hole and throttle opening is used, then flow control is achieved, but cavitation and noise are generated due to turbulence
Solution Approach 1:
The passage channel is designed with continuously curved walls without steps or edges, creating a smooth flow path that eliminates turbulence. The curved geometry guides the fluid smoothly from the inlet opening through the passage channel to the outlet opening, preventing the formation of cavitation bubbles and reducing noise generation while maintaining effective flow control
2Object-generated harmful factors
If deflectors or specific geometries are added to reduce noise, then noise development is reduced, but device complexity increases
Solution Approach 1:
The noise reduction function is merged into the basic passage channel structure itself. The curved walls of the passage channel simultaneously serve to guide flow and reduce turbulence, eliminating the need for separate deflectors or additional noise-reducing components. This integration maintains device simplicity while achieving the noise reduction goal
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 design significantly reduces noise development by minimizing turbulence and maintaining a consistent flow path, ensuring low noise levels across the valve's operation range.
Implementation Method 1
The walls of the passage channel between the inlet opening and the outlet opening of the passage channel are designed without steps and edges, ensuring a smooth transition and minimizing turbulence
Data Source
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AI summary
A control valve having a closing element, mounted in a housing between an inlet side and an outlet side and rotatable about an axis between a first and second end positions, and a passage channel through the closing element perpendicularly with respect to the rotational axis. The channel has inlet and outlet openings and connects the inlet side to the outlet side in the first end position, disconnects the inlet side from the outlet side in the second end position, and permits an increasing throughflow of a medium during the transition from the second end position into the first end position with a characteristic curve. Low valve noise is achieved because of the shape, size and configuration of the inlet and outlet openings of the passage channel and the configuration of walls of the passage channel without steps and edges.