Vibration Damping Device With Offset Communication Holes
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Solution Overview
Problem
Existing vibration-damping devices face issues with abnormal noise generation, structural complexity, and manufacturing difficulties, particularly when dealing with unintended vibrations of higher frequencies and smaller amplitudes, which can lead to increased dynamic spring constants affecting product characteristics.
Innovation Solution
A vibration-damping device with a tubular structure featuring a partitioning member that separates a liquid chamber into two compartments, where communication holes on opposing walls allow liquid flow between them, increasing pressure loss through orthogonal offsetting and varying diameters of protruding tubes to enhance energy absorption and damping across different vibration frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plunger member is used to switch between limiting passages, then vibration damping performance is improved, but abnormal noise generation increases and structure becomes more complex
Solution Approach 1:
The invention removes the plunger member from the system and extracts only the essential function of limiting passage switching. Instead of using a mechanical plunger to open/close passages, the design uses fixed limiting passages with different resonant frequencies that are always open, eliminating the noise source while maintaining vibration damping capability.
Solution Approach 2:
The invention segments the vibration damping function into multiple fixed limiting passages, each tuned to different vibration frequencies. This segmentation allows the system to handle multiple vibration modes simultaneously without requiring a single complex switching mechanism, thereby reducing noise and structural complexity.
2Reliability
If a plunger member is used to switch between limiting passages, then vibration damping performance is improved, but device structure becomes more complex and manufacturing becomes more difficult
Solution Approach 1:
The invention removes the plunger member and associated switching mechanism, extracting only the essential function of providing multiple limiting passages with different resonant frequencies. This simplifies the device structure significantly while maintaining the core vibration damping capability.
Solution Approach 2:
The invention merges multiple limiting passage functions into a single integrated structure where different passages are formed within the same component housing. This consolidation reduces the number of separate parts and simplifies manufacturing while maintaining multiple frequency tuning capabilities.
3Reliability
If limiting passage parameters are optimized for specific frequencies, then resonant vibration damping is improved, but dynamic spring constant increases for higher frequency vibrations
Solution Approach 1:
The invention segments the vibration control function into multiple limiting passages, each optimized for different frequency ranges. This allows the system to maintain low dynamic spring constant across a broader frequency spectrum by providing appropriate limiting passages for both low-frequency resonant vibrations and high-frequency unintended vibrations.
Solution Approach 2:
The invention changes the parameters of multiple limiting passages to create different resonant frequencies and flow characteristics. By carefully designing the dimensions and configurations of each passage, the system achieves optimal performance across multiple frequency ranges without excessive dynamic spring constant increase.
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 limits abnormal noise generation, simplifies the structure, and facilitates manufacturing while ensuring product characteristics by adjusting pressure loss based on flow speed, effectively damping a range of vibrations regardless of frequency, and preventing dynamic spring constant increases during low-speed flows.
Implementation Method 1
increasing pressure loss through orthogonal offsetting and varying diameters of protruding tubes to enhance energy absorption and damping
Implementation Method 2
absorbs and damps vibrations
Implementation Method 3
an elastic body that couples both the attachment members
Implementation Method 4
absorbs and damps vibrations of vibration generating parts
Data Source
AI summary
A partitioning member (16) of a vibration-damping device (10) is provided with a communication chamber (30), a first communication hole (31) and a second communication hole (32). The first communication hole (31) and the second communication hole (32) are arranged to be offset from each other in the axial direction (O). The first communication hole (31) is formed by the inside of a first protruding tube (31a) that protrudes into the communication chamber (30) from the first wall surface (30a). The second communication hole (32) is formed by the inside of the second protruding tube (32a) that protrudes into the communication chamber (30) from the second wall surface (30b). By including the configuration as described above, simplification of structure can be achieved.