Valve Retaining Cup with Segmented Prongs
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Solution Overview
Problem
Conventional retaining elements in valve assemblies, such as retaining rings and snap rings, are prone to dislodgment, breakage, or damage due to improper installation or wear, compromising the structural and operational integrity of the valve.
Innovation Solution
A valve assembly featuring a retaining cup with an annular shoulder and prongs that engage the spring guide within a bore of the casing, preventing rotation and ensuring secure retention while allowing fluid flow, thereby maintaining the integrity of the valve components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional retaining elements (retaining rings, snap rings) are used to retain valve components, then the valve assembly can be assembled, but the retaining elements become dislodged, broken, or damaged due to improper installation or wear
Solution Approach 1:
The retaining cup is segmented into multiple prongs (typically three) that are distributed around the circumference. Each prong independently engages with the spring guide, providing distributed retention forces. This segmentation allows the retaining cup to flex and adapt during installation while maintaining reliable retention, eliminating the single-point failure mode of conventional retaining rings.
Solution Approach 2:
The retaining cup transitions from a planar retaining ring to a three-dimensional cup structure with prongs extending radially inward. This dimensional change allows the prongs to engage the spring guide from multiple directions simultaneously, providing multi-directional constraint and preventing dislodgment that cannot be achieved with conventional two-dimensional retaining elements.
2Reliability
If a retaining mechanism is added to secure the spring guide, then retention reliability improves, but the device complexity increases
Solution Approach 1:
The retaining cup merges multiple functions into a single component: it retains the spring guide, prevents rotation through the planar inner surface of the prongs, and maintains structural integrity within the bore. This consolidation eliminates the need for separate retaining rings, clips, or locking mechanisms, reducing overall assembly complexity while improving reliability.
Solution Approach 2:
The retaining cup serves multiple functions simultaneously: axial retention of the spring guide, rotational prevention through flange engagement, and structural support within the bore. This multi-functionality reduces the number of separate components needed, simplifying the overall valve assembly while maintaining high retention reliability.
Data Source
Figure 1
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AI summary
A valve (100) including a valve housing (105, 106), a casing (110), a spring guide (120), and a retaining cup (130). The casing (110) may be disposed within the valve housing (105, 106) and may include a bore (112). The spring guide (120) may be disposed within the bore (112) and the retaining cup (130) may be disposed partially around the casing (110) to engage and retain the spring guide (120) at least partially within the bore (112) of the casing (110).