Damper Seal Ring Inclined Surface Restoration
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Solution Overview
Problem
The existing damper device's seal ring fails to restore its original shape when deformed significantly, leading to a reduction in damping force due to continuous communication between the interior and exterior spaces of the piston, affecting the initial damping force when the device operates.
Innovation Solution
A damper device design featuring a piston with an annular outer circumferential portion, stopper portions, and a projecting portion with an inclined surface to guide the seal ring's deformation and ensure communication between chambers, preventing a reduction in damping force by facilitating the seal ring's return to its original shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the seal ring is designed to restore its original shape by a restoring force when deformed partially, then the seal ring can be simplified in structure, but when the seal ring deflects greatly, it fails to restore its original shape, causing the interior space and exterior space of the piston to remain communicating and reducing the initial damping force
Solution Approach 1:
An inclined surface is introduced as an intermediary structure between the seal ring and the piston body. This inclined surface acts as a mediator that guides the seal ring's deformation and restoration, providing a controlled path for the seal ring to return to its original position after being compressed by fluid pressure, thereby ensuring reliable damping force generation.
Solution Approach 2:
The inclined surface is pre-configured on the piston body to anticipate and guide the seal ring's deformation behavior. By providing this predetermined geometric feature beforehand, the system ensures that when fluid pressure compresses the seal ring, the restoration process is automatically directed along the inclined surface, preventing the seal ring from deflecting excessively and failing to restore.
2Productivity
If the seal ring is allowed to deform to enable communication between chambers, then the damping force is reduced during operation, but without proper restoration mechanism, the initial damping force is compromised
Solution Approach 1:
The seal ring's state is made dynamic rather than static. The inclined surface enables the seal ring to transition between two states: sealed (when not compressed) and communication-enabled (when compressed by fluid pressure during operation). After compression, the inclined surface guides the seal ring to automatically return to its sealed state, ensuring both operational productivity and initial damping force reliability.
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 effectively maintains the damping force by ensuring the seal ring's proper deformation and return, preventing the continuous communication that reduces the initial damping force, thus enhancing the damper device's operational efficiency.
Implementation Method 1
due to friction caused between the seal ring member and the cylinder or a fluid pressure from the second chamber
Implementation Method 2
the seal ring is designed to restore its original shape by a restoring force when the seal ring is deformed partially
Data Source
AI summary
A damper device includes a cylinder, a piston, a seal ring member, and a transmitting portion. The piston includes an annular outer circumferential portion, a first stopper portion, a second stopper portion, and a projecting portion. The projecting portion has an inclined surface which is inclined radially outwards form a side of the second stopper portion towards a side of the first stopper portion. The seal ring member is configured to allow a first chamber to communicate with a second chamber when a portion of the seal ring member which is not restricted by the first stopper portion is deformed in a direction away from the second stopper portion due to friction caused between the seal ring member and the cylinder or a fluid pressure from the second chamber to ride on the inclined surface.