Fluid Filled Vibration Damping Device Air Evacuation Grooves
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Solution Overview
Problem
Conventional fluid-filled vibration damping devices face issues with air remaining in the system due to the flexible membrane adsorbing to the partition member during vacuum drawing, which affects the vibration damping properties.
Innovation Solution
The introduction of first and second communication grooves on the partition member ensures that through holes and the orifice passage remain connected, allowing air to be evacuated from the system, preventing residual air from causing compressibility issues and maintaining effective vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum drawing is performed to evacuate air from the pressure receiving chamber and equilibrium chamber, then air removal is improved, but the flexible membrane is adsorbed to the partition member causing air to become trapped
Solution Approach 1:
The partition member is divided into multiple regions: a first region with through holes for fluid pressure transmission, a second region with the orifice passage for vacuum drawing, and a third region (communication groove) that connects them. This segmentation allows different functions to be performed in different regions simultaneously, enabling air evacuation while maintaining fluid pressure transmission pathways open.
Solution Approach 2:
The communication groove acts as an intermediary pathway that connects the through holes and orifice passage. During vacuum drawing, this groove allows air to flow from the through holes to the orifice passage exit, preventing air trapping even when the flexible membrane covers the through holes. The groove serves as a backup air escape route that is not blocked by membrane adsorption.
2Reliability
If the flexible membrane is made easily deformable for good sealing, then sealing performance is improved, but the membrane is quickly adsorbed to the partition member during vacuum drawing
Solution Approach 1:
The partition member is divided into multiple regions: a first region with through holes for fluid pressure transmission, a second region with the orifice passage for vacuum drawing, and a third region (communication groove) that connects them. This segmentation allows different functions to be performed in different regions simultaneously, enabling air evacuation while maintaining fluid pressure transmission pathways open.
Solution Approach 2:
The communication groove acts as an intermediary pathway that connects the through holes and orifice passage. During vacuum drawing, this groove allows air to flow from the through holes to the orifice passage exit, preventing air trapping even when the flexible membrane covers the through holes. The groove serves as a backup air escape route that is not blocked by membrane adsorption.
3Stability of the object's composition
If the through holes are blocked by the movable member during vacuum drawing, then fluid pressure transmission is maintained, but air in the through holes cannot be evacuated
Solution Approach 1:
The partition member is divided into multiple regions: a first region with through holes for fluid pressure transmission, a second region with the orifice passage for vacuum drawing, and a third region (communication groove) that connects them. This segmentation allows different functions to be performed in different regions simultaneously, enabling air evacuation while maintaining fluid pressure transmission pathways open.
Solution Approach 2:
The communication groove acts as an intermediary pathway that connects the through holes and orific e passage. During vacuum drawing, this groove allows air to flow from the through holes to the orifice passage exit, preventing air trapping even when the flexible membrane covers the through holes. The groove serves as a backup air escape route that is not blocked by membrane adsorption.
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 effectively prevents air from being trapped, ensuring stable vibration damping properties by ensuring air is evacuated during vacuum drawing, thus enhancing the performance of the fluid-filled vibration damping device.
Implementation Method 1
using vibration damping effects based on the flow behavior of an incompressible fluid sealed therein
Implementation Method 2
an equilibrium chamber with its walls partially composed of a flexible membrane... the flexible membrane made easily deformable
Implementation Method 3
a movable member is arranged to which fluid pressures of the pressure receiving chamber and equilibrium chamber are applied... taking advantage of the deformation or displacement of the movable member
Implementation Method 4
if one tries to force out (vacuum draw) air in the pressure receiving chamber and the equilibrium chamber
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A post-formation filling type fluid filled vibration damping device (10) wherein a first communication groove (86), which interconnects a plurality of through holes (84), is formed in a partition member (26) that separates a pressure receiving chamber (62) and an equilibrium chamber (74), the groove being formed in a surface of the partition member (26) that opposes a flexible membrane (64). In addition, a second communication groove (88), which connects an orifice passage (80) and at least one of the plurality of through holes (84), is formed in the surface of the partition member (26) that opposes the flexible membrane (64).