Piston Seal Assembly for Low-Resistance Damper Motion
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Solution Overview
Problem
Existing damper devices face challenges in stabilizing the assembled condition of the seal member while minimizing resistance to the piston's movement within the cylinder, particularly during space reduction.
Innovation Solution
The damper device incorporates a piston member, cylinder member, and a seal member with specific holding portions and passing portions to allow smooth fluid movement between spaces, reducing unexpected sliding resistance and enabling a braking force primarily during forward movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal member is fitted into a piston to seal between the piston and cylinder, then sealing performance is improved, but sliding resistance increases during piston movement
Solution Approach 1:
The seal member is divided into multiple functional portions: a base portion for sealing, an extending portion for guiding, and a held portion for stability. The piston member is segmented into multiple holding portions that interact with different parts of the seal member. This segmentation allows each portion to perform its specific function independently, reducing overall friction while maintaining sealing effectiveness.
Solution Approach 2:
Different portions of the seal member have different functional properties: the base portion provides sealing contact, the extending portion provides guidance, and the held portion provides stability. The holding portions on the piston are strategically positioned to interact with specific portions of the seal member, creating localized functional zones that optimize both sealing and reduce friction in different areas.
2Reliability
If the seal member is stabilized in its assembled condition, then sealing reliability is improved, but fluid movement between spaces is restricted
Solution Approach 1:
The extending portion of the seal member acts as an intermediary element between the base portion and the held portion. It provides a gradual transition zone that allows fluid to pass through while maintaining the structural integrity and stability of the seal member assembly. The extending portion mediates between the sealing function and the fluid passage function.
Solution Approach 2:
The held portion of the seal member is positioned within the holding portions of the piston, creating a nested structure. This nested arrangement allows the seal member to be stabilized by the piston structure while still permitting fluid to flow through the passing portions formed by the interaction between the held portion and the piston's holding portions.
3Reliability
If a V-shaped seal member is used for sealing, then sealing performance is improved, but unexpected sliding resistance occurs due to deformation
Solution Approach 1:
The seal member is designed with flexible portions that can deform elastically to maintain sealing contact while accommodating piston movement. The extending portion and held portion are designed to flex within specific ranges, allowing the seal to adapt to pressure changes and movement conditions without creating excessive friction or resistance.
Solution Approach 2:
The seal member transitions from a static V-shaped design to a dynamic multi-portions structure that can adapt its configuration during operation. The extending portion and held portion can change their position and shape in response to pressure differential and piston movement, optimizing the balance between sealing performance and friction reduction in real-time operating conditions.
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
The solution stabilizes the seal member assembly and minimizes resistance during piston movement, effectively applying a braking force only during forward motion, enhancing the damper's functionality and reducing unexpected sliding resistance.
Implementation Method 1
a seal member sealing between the piston member and the cylinder member
Implementation Method 2
the second holding portion is formed with one or more than two passing portions of the fluid
Implementation Method 3
provides a braking force by a movement or a relative movement of the piston member
Implementation Method 4
a damper device comprises a piston member, a cylinder member housing the piston member, and a seal member sealing between the piston member and the cylinder member, and provides a braking force by a movement or a relative movement of the piston member
Data Source
AI summary
The present invention addresses the problem of stabilizing the state of assembly of a seal member while allowing movement of a piston member in a direction that reduces one space inside a cylinder member with little resistance. The seal member includes a base portion located towards the one space, which is a first space inside the cylinder member, and an extending portion extending from the base portion toward the other space, which is the second space inside the cylinder member. The piston member is provided with a first holding portion that faces the base portion of the sealing member, a second holding portion that faces an extended edge of the extended portion of the sealing member, and a third holding portion that faces a held part formed on the inside of the extended portion of the seal member. A fluid passage is formed in the second holding portion.