Viscous Damper Chamber Sealing for Stable Damping Force
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Solution Overview
Problem
The existing damper devices experience a reduction in damping force due to gas movement into the gaps around the annular protrusions, leading to instability in damping force generation.
Innovation Solution
A damper device design that includes a base, a rotor, and a cap with a housing chamber filled with viscous liquid, where a reservoir chamber is created on the outer side of the housing chamber in the radial direction, and the gap between the two chambers is sealed to prevent gas movement and ensure stable damping force generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas is present in the sealing portion, then the structure is simple, but gas moves to gaps around annular protrusions reducing damping force
Solution Approach 1:
The invention divides the liquid-containing space into two separate chambers: a housing chamber for the rotor and a reservoir chamber for excess liquid. This segmentation prevents gas from the sealing portion from contaminating the housing chamber, thereby maintaining stable damping force while managing the complexity through functional separation.
Solution Approach 2:
A seal member is introduced as an intermediary component between the housing chamber and reservoir chamber. This seal member prevents gas movement between chambers while allowing the system to maintain its overall structure, resolving the contradiction by adding a targeted component rather than redesigning the entire system.
2Reliability
If the gap between housing chamber and reservoir chamber is sealed, then damping force stability improves, but manufacturing complexity increases
Solution Approach 1:
The invention uses a flexible seal member (such as an O-ring or elastomeric seal) to close the gap between the housing chamber and reservoir chamber. This approach provides effective sealing while maintaining ease of manufacture, as flexible seal members are standard components that can be easily installed without complex assembly procedures.
3Force
If viscous liquid is contained in the housing chamber, then damping force is generated, but gas contamination reduces the damping effect
Solution Approach 1:
The invention extracts and isolates the potential source of contamination (gas in the sealing portion) by creating a separate reservoir chamber. This prevents gas from contaminating the viscous liquid in the housing chamber, thereby preserving the damping force generation capability while eliminating the harmful effect of gas contamination.
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 design effectively stabilizes the damping force by preventing gas movement and ensuring consistent viscous resistance, resulting in a reliable and efficient damping force application.
Implementation Method 1
a damper device filled with viscous liquid
Data Source
AI summary
There is provided a damper device, including: a base; a rotor rotatably supported by the base; a cap defining a housing chamber of the rotor together with the base; and viscous liquid filled in the housing chamber. The base and the cap define a reservoir chamber for the viscous liquid on an outer side of the housing chamber in a radial direction. A gap between the housing chamber and the reservoir chamber is sealed.