Spool Valve Plug Aperture Layout for Angular-Independent Flow
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Solution Overview
Problem
The alignment of plug apertures with spool valve apertures in linearly-actuated fluid valves is complex, leading to reduced fluid flow when misaligned, which complicates manufacturing and affects flow consistency.
Innovation Solution
A spool valve assembly design where the spool apertures overlap plug apertures radially, ensuring consistent fluid flow regardless of the angular position between the spool valve and the valve plug, with a configuration that maintains a defined flow rate variance by varying the number of apertures between the spool valve and the valve plug.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the plug apertures are aligned with the spool valve apertures at a defined angular position, then the fluid flow is maximized, but the manufacturing complexity increases
Solution Approach 1:
The patent changes the geometric parameters of the apertures by making them radially overlapping rather than precisely aligned. This parameter change allows the plug and spool valve to maintain effective fluid flow paths across a range of angular positions, eliminating the need for precise angular alignment during manufacturing while preserving fluid flow efficiency
Solution Approach 2:
The radially overlapping aperture configuration provides universal functionality across multiple angular positions. The design ensures that regardless of the relative angular position between the plug and spool valve, the fluid flow remains within acceptable variance, making the system insensitive to angular misalignment and simplifying manufacturing requirements
2Ease of manufacture
If the plug apertures and spool valve apertures are offset from each other, then the manufacturing complexity is reduced, but the fluid flow significantly decreases
Solution Approach 1:
The patent transitions from a one-dimensional alignment approach (precise angular positioning) to a two-dimensional radially overlapping configuration. This dimensional change allows apertures to overlap in the radial direction while accommodating angular offsets, thereby maintaining fluid flow efficiency without requiring precise angular alignment during manufacturing
3Reliability
If the angular alignment of plug with spool valve is precisely controlled, then the fluid flow consistency is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent changes the spatial parameter from precise angular alignment to radially overlapping configuration. This parameter change decouples fluid flow consistency from angular alignment precision, allowing the system to maintain reliable fluid flow across varying angular positions without requiring high manufacturing precision for angular positioning
Data Source
AI summary
A spool valve assembly, configured to control the flow of fluid, includes a spool valve, configured to move axially along an axis to control fluid flow, having a spool cavity and a plurality of spool apertures that communicate fluid between the spool cavity and an outside surface of the spool valve; a valve sleeve, in which the spool valve is concentrically positioned, that slidably receives the spool valve; and a valve plug, received within the spool cavity, having at least one plug aperture and a plug cavity, wherein the spool apertures at least partially overlap the plug aperture(s) in a radial direction to permit the flow of fluid between the plug cavity and the outside surface within a defined flow rate variance regardless of the angular position of the valve plug relative to the angular position of the spool valve.