Vibration Isolation Device With Barrier Rigid Body
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Solution Overview
Problem
Existing vibration isolation devices face challenges in simplifying structure and manufacturing while maintaining product characteristics, particularly due to increased dynamic spring constant issues from unintended vibrations and clogging of limit passages.
Innovation Solution
The introduction of a vibration isolation device with a barrier rigid body in the communication passages between liquid chambers, which increases pressure loss at high flow speeds to absorb vibrations, and suppresses pressure loss at low flow speeds to prevent dynamic spring constant increases, allowing for effective damping of various frequency vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a limit passage with specific dimensions is provided to dampen vibrations at resonant frequencies, then vibrations at those frequencies are effectively dampened, but unintended vibrations with higher frequencies may cause clogging and increase the dynamic spring constant
Solution Approach 1:
The limit passage is divided into multiple sections with different cross-sectional areas along its length. This segmentation allows different portions of the passage to handle different frequency vibrations, preventing clogging from high-frequency vibrations while maintaining effectiveness against resonant frequency vibrations.
Solution Approach 2:
Different sections of the limit passage have different local properties (cross-sectional areas) optimized for specific functions. The varying cross-sectional areas create different flow resistance characteristics at different locations, enabling the passage to address multiple vibration frequency scenarios simultaneously.
2Ease of manufacture
If the structure is simplified to facilitate manufacture, then manufacturing ease is improved, but the ability to handle multiple vibration frequencies may be compromised
Solution Approach 1:
The limit passage with varying cross-sectional areas combines multiple vibration damping functions into a single integrated structure. This merging approach achieves multi-frequency vibration handling capability without requiring multiple separate components, thus maintaining manufacturing simplicity while enhancing versatility.
3Reliability
If the liquid flow speed is increased to enhance vibration damping through collision, then vibration damping is improved, but pressure loss increases and may suppress liquid flow
Solution Approach 1:
The limit passage structure dynamically adapts to different flow conditions through its varying cross-sectional areas. At different flow speeds, different sections of the passage become active, allowing the system to maintain effective vibration damping across a range of operating conditions while managing pressure loss.
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 solution enhances structural simplicity and manufacturing ease while ensuring effective vibration damping across different frequencies, preventing noise and maintaining product characteristics by controlling dynamic spring constant.
Implementation Method 1
vibrations are absorbed and dampened due to energy loss generated by collision between the liquid and the barrier rigid body
Implementation Method 2
the pressure loss of the liquid increases and vibrations are absorbed and dampened due to energy loss generated by collision
Implementation Method 3
the liquid smoothly flows into the first communication passage, the intermediate chamber, and the second communication passage
Data Source
Figure 1
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AI summary
A vibration isolation device (10) of the present invention includes a tubular first attachment member (11) coupled to one of a vibration generating part and a vibration receiving part, and a second attachment member (12) coupled to the other thereof, an elastic body (13) which couples both the attachment members together, and a partition member (16) which partitions a liquid chamber within the first attachment member (11) having a liquid (L) enclosed therein into a first liquid chamber (14) and a second liquid chamber (15), in which at least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) as a portion of a wall surface thereof, the partition member (16) includes an intermediate chamber (43) which is disposed inside the partition member (16), a first communication passage (42a) which communicates with the intermediate chamber (43) and the first liquid chamber (14), and a second communication passage (42b) which communicates with the intermediate chamber (43) and the second liquid chamber (15), and a barrier rigid body (33) which faces at least one of the first communication passage (42a) and the second communication passage (42b) is disposed inside the intermediate chamber (43).