Stepped Multi-Stage Throttle Valve for Noise and Cavitation Control
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Solution Overview
Problem
Traditional multi-stage throttle control valves face issues with noise, cavitation damage, and high manufacturing costs due to complex structures and limited pressure reduction stages, making them unsuitable for high-pressure-difference medium control conditions.
Innovation Solution
A champagne tower-type multi-stage throttle control valve with a compact, simple structure featuring a stepped throttle sleeve and valve core with axial or oblique flow channel grooves, providing noise reduction and cavitation resistance through multi-channel parallel and series connections, and a conical outer wall for enhanced sealing and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sleeve-type multi-stage control valves are used, then the structure is simple, but the number of pressure reduction stages is limited
Solution Approach 1:
The patent applies nesting by placing multiple throttle sleeves with different hole patterns inside a single valve core, allowing multiple pressure reduction stages to be integrated within one component. The first throttle sleeve with first holes and the second throttle sleeve with second holes are nested within the valve core, enabling complex multi-stage pressure control without increasing overall structural complexity.
Solution Approach 2:
The patent segments the pressure reduction function into multiple independent throttle sleeves, each with specific hole configurations. This segmentation allows each sleeve to handle specific pressure reduction stages, and the combination of multiple sleeves provides the equivalent of having multiple separate valves, thereby increasing adaptability while maintaining a unified structure.
2Reliability
If labyrinth-type multi-stage control valves are used, then the resistance coefficient is improved, but the structure is complex and manufacturing cost is high
Solution Approach 1:
The patent uses simplified hole patterns in throttle sleeves that replicate the flow resistance function of complex labyrinth structures. Instead of creating actual labyrinthine passages, the patent copies the essential function of resistance control through strategically positioned holes in multiple throttle sleeves, achieving similar performance with much simpler manufacturing.
Solution Approach 2:
The patent extracts the essential function of the labyrinth structure (flow resistance control) from its complex geometric form. By removing the intricate labyrinth geometry and retaining only the core function through hole-based flow control in throttle sleeves, the design achieves the desired resistance coefficient without the manufacturing complexity and high costs associated with true labyrinth structures.
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 achieves effective noise reduction, cavitation damage resistance, and reduced manufacturing complexity and cost, ensuring reliable operation under high-pressure conditions with improved throttling efficiency and extended service life.
Implementation Method 1
a flow channel groove is axially or obliquely formed on each of the hole shoulders of the throttle sleeve and/or the shaft shoulders of the valve core, and a flow channel groove on the hole shoulder and a flow channel groove on the shaft shoulder are spaced away from each other; and when the valve core produces an axial displacement action relative to the throttle sleeve until a sealing surface is exposed, the sealing surface formed by the hole shoulders of the throttle sleeve and the shaft shoulders of the valve core that match each other communicates with the flow channel grooves to form the fluid passage
Data Source
AI summary
A champagne tower-type multi-stage throttle control valve includes a valve body, a valve cover, a throttle sleeve, and a valve core. A sleeve cavity of the throttle sleeve is shaped as a stepped hole with two or more layers. The valve core is shaped as a stepped shaft with two or more layers coaxial with the throttle sleeve. The number of shaft shoulders of the valve core is smaller than or equal to the number of hole shoulders of the sleeve cavity of the throttle sleeve, such that each set of shaft shoulders of the valve core in an axial direction can form a sealing surface fit with corresponding hole shoulders of the throttle sleeve. A flow channel groove is axially or obliquely formed on each of the hole shoulders of the throttle sleeve and/or the shaft shoulders of the valve core.