Pressure Buffer Flow Path Wear Reduction
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Solution Overview
Problem
Manufacturing of flow path forming portions for pressure buffer devices faces challenges due to wear issues when stacked, requiring methods to suppress wear and facilitate easy manufacturing, especially in sections with complex shapes.
Innovation Solution
The pressure buffer device incorporates a flow path forming portion with a first protruded portion for contact with the opening-closing mechanism and a second protruded portion tilted at an angle, which is radially positioned to avoid contact and reduce wear, allowing for easier manufacturing through molding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flow path forming portions are stacked for manufacturing, then manufacturing efficiency is improved, but wear occurs at contact sections between stacked portions
Solution Approach 1:
The invention extracts the problematic contact section by positioning the second protruded portion such that its end in the axial direction is located at a radially outer side of the first protruded portion. This spatial separation prevents contact between stacked flow path forming portions at critical sections, eliminating wear while maintaining manufacturing efficiency through stacking.
Solution Approach 2:
The invention transitions from a single-axis alignment problem to a two-dimensional spatial arrangement by using both radial and axial positioning. The second protruded portion is arranged radially outward relative to the first protruded portion, creating a non-contact configuration in the radial direction while maintaining axial stacking for manufacturing efficiency.
2Reliability
If flow path forming portions have complex shapes for functional requirements, then device performance is improved, but manufacturing difficulty increases
Solution Approach 1:
The flow path forming portion is segmented into multiple functional protruded portions (first and second protruded portions) with distinct functions. The first protruded portion contacts the opening-closing portion for flow control, while the second protruded portion provides structural support without contacting adjacent stacked components. This segmentation allows each portion to be optimized for its specific function while simplifying the overall manufacturing process.
3Ease of operation
If protruded portions are positioned to contact for functional operation, then device functionality is improved, but wear and manufacturing complexity increase
Solution Approach 1:
The invention applies local quality by providing contact functionality only where needed (first protruded portion contacting the opening-closing portion) while eliminating contact at other locations (second protruded portion positioned radially outward). This localized contact approach maintains essential device functionality while reducing overall structural complexity and wear risks.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
One embodiment provides a pressure buffer device including: a cylinder that stores fluid; a flow path forming portion that forms a flow path; and an opening-closing portion that opens and closes the flow path of the flow path forming portion. The fluid flows through the flow path forming portion in accordance with relative movement of a rod with respect to the cylinder in an axial direction of the cylinder. The flow path forming portion includes an annular first protruded portion and an annular second protruded portion protruded in the axial direction in opposite sides respectively. The second protruded portion has an axial end located at a radially outer side of the first protruded portion, and a tilt portion formed at least at a part of a radially-inner part of the second protruded portion.