Modular Spool Valve Structure for Lower Turbulence and Weight
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Solution Overview
Problem
Current spool valve designs for heavy machinery in the earth moving, construction, and mining industries lack optimal fluid flow management and structural efficiency, particularly in terms of turbulence reduction and weight distribution.
Innovation Solution
A spool valve assembly with modular design, featuring land and metering modules fabricated using additive and subtractive manufacturing techniques, where pillars are strategically located to reduce turbulence and weight while maintaining structural integrity, and metering pockets are optimized for improved fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid core runs the entire length of the spool, then structural integrity is improved, but weight increases and turbulence is not reduced
Solution Approach 1:
The spool is divided into multiple discrete components including a hub, blade, and optional struts rather than being a solid monolithic structure. This segmentation reduces weight while maintaining structural integrity through strategic placement of load-bearing elements.
Solution Approach 2:
The spool incorporates a porous or hollow structure instead of a solid core, allowing fluid passage through the spool body. This reduces weight and can help manage turbulence by allowing controlled fluid interaction with the spool structure.
2Ease of manufacture
If a monolithic spool design is used, then manufacturing is simplified, but fluid flow efficiency is reduced due to turbulence
Solution Approach 1:
The spool valve is segmented into separate components (hub, blade, struts) that can be manufactured independently and assembled. This allows optimization of each component for fluid flow characteristics while maintaining manufacturing feasibility through modular construction.
Solution Approach 2:
The design transitions from a traditional linear spool to a radial or three-dimensional valve structure with blades extending from a central hub. This dimensional change allows fluid to flow around multiple surfaces simultaneously, reducing turbulence and improving flow efficiency.
3Strength
If traditional spool design is used, then structural integrity is maintained, but weight is excessive and fluid flow is not optimized
Solution Approach 1:
The spool is segmented into a hub, blade, and optional struts, reducing material usage and weight while maintaining structural integrity through strategic load-bearing design. This segmentation also optimizes fluid flow paths around each component.
Solution Approach 2:
The design changes key geometric parameters including transitioning to a radial configuration with blades at specific angles, optimizing the ratio of land area to metering area, and adjusting the dimensions of the hub and struts to balance structural strength with fluid flow efficiency.
Data Source
AI summary
A spool for a spool valve assembly defines a spool longitudinal axis and includes a first land module defining a first land module circumferential surface, a second land module defining a second land module circumferential surface, and a first metering module. The first metering module has a first end cap and a second end cap. The first end cap is coupled to the first land module, and the second end cap is coupled to the second land module, to form the spool. The first metering module may further include at least two pillars extending from the first end cap to the second end cap, wherein the at least two pillars are entirely disposed within a virtual first metering module hollow cylinder area that surrounds a virtual first metering module central core area concentric with the spool longitudinal axis.