Segmented Seal Inspection Housing for Rod Protrusions
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Solution Overview
Problem
Current seal state detection devices for cylinder devices have limited flexibility in timing of inspection due to structural constraints, particularly when components protrude radially outward from the piston rod, reducing the degree of freedom in inspecting seal abnormalities.
Innovation Solution
A seal state detection device comprising multiple part case members with cylinder and rod facing parts that align circumferentially, forming a housing chamber between them, where the seal parts include protruding and recessed elements that fit together, allowing for inspection regardless of radial protrusions and enhancing durability and sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single integrated case member is used to house the cylinder and rod, then the structural simplicity is maintained, but the adaptability in inspection timing is reduced when radial protrusions are present
Solution Approach 1:
The case is divided into multiple part case members (first part case member and second part case member) that can be disposed at different circumferential positions. This segmentation allows the housing chamber to accommodate radial protrusions on the rod by positioning the case members to avoid interference, while still forming a complete sealed chamber for inspection purposes.
2Reliability
If the seal part has a simple flat structure, then the manufacturing simplicity is maintained, but the sealing reliability is reduced when accommodating radial protrusions
Solution Approach 1:
The seal part is designed with localized protruding and recessed portions at specific positions rather than a uniformly complex structure. The protruding portion fits into the recessed portion of adjacent part case members, creating enhanced sealing contact points exactly where needed to accommodate radial protrusions while maintaining simplicity in other areas.
3Volume of stationary object
If the part case members are positioned closely together, then the housing chamber volume is minimized, but the stress concentration increases at the fitting interfaces
Solution Approach 1:
The fitting interface between part case members employs an asymmetric design where a protruding portion of one member fits into a recessed portion of the adjacent member. This asymmetric configuration distributes mechanical stresses more effectively across the fitting interface compared to a symmetric flat-to-flat connection, reducing stress concentration while maintaining compact housing chamber volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration increases the flexibility in timing of inspection by forming a housing chamber that can accommodate radial protrusions, reduces stress concentration, and improves sealing properties, thereby enhancing the detection of seal abnormalities.
Implementation Method 1
a decompression step of bringing the inside of the housing chamber into a decompressed state in which a pressure thereof is reduced by a predetermined pressure from atmospheric pressure
Data Source
AI summary
This seal state detection device includes a plurality of part case members including a cylinder facing part and a rod facing part and are aligned in a circumferential direction of a cylinder by causing the cylinder facing part to face the cylinder and the rod facing part to face a rod so that a housing chamber for housing a part of the cylinder and a part of the rod is formed between the cylinder facing part and the rod facing part. The cylinder facing part includes a seal part which contacts with the cylinder. The seal part includes a protruding part formed at one end and a recessed part formed at the other end in the circumferential direction of the cylinder. The protruding part and the recessed part are fitted to each other when the plurality of part case members are aligned in the circumferential direction of the cylinder.