Segmented Valve Sleeve Reducing Compressed Air Leakage
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Solution Overview
Problem
High-pressure compressed air leaks in blow molding processes lead to inefficiencies and increased costs due to the need for expensive equipment and storage, as well as the production of defective products with inconsistent blowing pressures, which complicates light weighting efforts.
Innovation Solution
The design of a mechanical three-way valve with a segmented sleeve and internal seals that eliminates the need for strict indexing between the sleeve and shaft, allowing for consistent air flow and reducing leaks by using a concentrically fitting shaft and sleeve with strategically positioned ports and seals that can be easily repaired.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional valve design with strict indexing is used, then proper fluid flow control is achieved, but air leakage occurs and maintenance complexity increases
Solution Approach 1:
The valve body is divided into multiple segments that can rotate independently relative to each other. Each segment contains ports that align with corresponding shaft ports at specific rotational positions, allowing the valve to maintain proper fluid flow control while eliminating the need for strict indexing between the shaft and sleeve. The segmented design enables one segment to rotate without affecting the alignment of other segments.
2Productivity
If high pressure compressed air is used, then blow molding efficiency is improved, but air leakage causes energy loss and increased costs
Solution Approach 1:
The valve design ensures continuous and consistent fluid flow through multiple internal seals positioned at strategic locations within the segmented structure. These seals prevent air leakage throughout the entire operational cycle, maintaining continuous useful action without interruptions or losses. The seals are positioned to prevent leakage at all interfaces between segments and the shaft, ensuring that high pressure compressed air is delivered efficiently without escape.
3Ease of manufacture
If a unitary sleeve design is used, then manufacturing is simplified, but repairability is reduced and seal replacement becomes difficult
Solution Approach 1:
The sleeve is divided into multiple separable segments that can be independently removed and reassembled. This segmentation allows seals to be accessed and replaced by simply separating the segments, eliminating the need to disassemble the entire valve or replace the whole sleeve. Each segment can be serviced independently, dramatically improving repairability while maintaining the structural integrity and functional performance of the complete valve assembly.
Data Source
AI summary
The present disclosure provides air-tight mechanical valves. In a general embodiment, the valves include a shaft and a segmented sleeve. The shaft includes a plurality of shaft ports distributed around a circumference of the shaft. The sleeve is configured to fit concentrically around the shaft and includes a body having at least two body pieces, at least one internal seal, and at least one set of a plurality of sleeve ports distributed around a circumference of the body. The plurality of sleeve ports cooperates with the plurality of shaft ports to facilitate fluid flow. The valves of the present disclosure advantageously reduce losses of pressure and compressed air during use.