Hydraulic Mount Membrane Switching for Multi-Frequency Vibration Damping
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Solution Overview
Problem
Existing anti-vibration hydraulic mounts are limited to damping vibrations in a single frequency range and require actuators for switching between different damping modes, leading to potential reliability issues.
Innovation Solution
A partition element with a membrane that can switch between open and closed configurations based on vibration frequency and amplitude, using a passive mechanism to adjust damping characteristics without actuators, comprising a central passageway with a closing device and annular protuberance to block or allow fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switch with an actuator is used to change damping characteristics in different vibration frequency ranges, then the adaptability to different vibration frequencies is improved, but the reliability of the anti-vibration device deteriorates due to potential actuator failure
Solution Approach 1:
The membrane automatically changes its configuration based on the vibration frequency and amplitude it experiences, without requiring external control signals or actuators. The membrane's own deformation under different vibration conditions triggers the switching between open and closed states, making the system self-regulating and eliminating actuator-related reliability issues
Solution Approach 2:
The membrane transitions from a static structure to a dynamic one that automatically adjusts its configuration in response to changing vibration conditions. The membrane's ability to deform and change shape based on the frequency and amplitude of vibrations allows the system to adapt damping characteristics dynamically without external intervention
2Adaptability or versatility
If the membrane is deformed towards the central passageway beyond the first distance, then the closing device abuts against the central opening to close the central passageway, but the rounded edge of the central opening may cause interference with the closing device
Solution Approach 1:
The central opening is designed with a rounded edge instead of a sharp edge, which matches the curved surface of the annular protuberance's closing device. This curved geometry allows for smoother contact and abutment between the closing device and the central opening, reducing stress concentration and facilitating easier manufacturing while maintaining effective sealing
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 membrane effectively changes damping characteristics in two frequency ranges, enhancing reliability and robustness by passively adapting to different vibration frequencies and amplitudes, eliminating the need for actuators.
Implementation Method 1
the membrane vibrates at an amplitude of 0.1 mm because of the pressure difference between the working chamber and the compensating chamber
Implementation Method 2
Anti-vibration devices for mounting an engine on a vehicle body are known, comprising a first frame connected to a second frame by means of an anti-vibration hydraulic mount able to be deformed at least along a main vibration axis
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
Partition member (22) of an anti-vibration hydraulic mount (14) comprising a first channel (26) and a second channel (28) between the working chamber (20) and the compensating chamber (25). The partition member (22) comprising a membrane (32) secured in a receiving cavity, the membrane (32) dividing the receiving cavity into two sub-spaces separated fluidically from each other. The membrane (32) comprises a closing device being able to have two configurations: an open configuration, the closing device being spaced apart from the central opening (42), and a closed configuration, the closing device abutting against the central opening (42) to close the central passageway.