Hydraulic Anti-Vibration Mount With Flexible Membrane Damping
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Solution Overview
Problem
Existing hydraulic anti-vibration mounts require complex assemblies with moving parts, leading to jamming risks and assembly challenges due to the need for unitary parts in the intermediate chamber.
Innovation Solution
The anti-vibration mount design incorporates a flexible membrane that separates an auxiliary chamber from the intermediate chamber, allowing liquid flow only from the working chamber to the auxiliary chamber through a check valve and emptying into the compensation chamber, eliminating the need for additional return parts and simplifying assembly by relying on the membrane's elastic characteristics for return to its normal position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piston with spring return mechanism is used in the intermediate chamber to control liquid flow, then the mount can damp vibrations effectively, but the assembly becomes complex and jamming risks increase
Solution Approach 1:
The invention extracts the spring return mechanism from the system by replacing it with a flexible membrane that uses its own elastic characteristics to return to the normal position. This eliminates the need for separate return parts while maintaining the vibration damping function through controlled liquid flow.
Solution Approach 2:
The invention uses a flexible membrane made from elastomer material to control liquid flow between chambers. The membrane's elasticity provides the return mechanism inherently, eliminating the need for complex mechanical return systems while maintaining effective vibration damping through pressure-driven flow control.
2Device complexity
If unitary parts are used in the intermediate chamber to control liquid flow, then the mount structure is simplified, but jamming risks increase
Solution Approach 1:
The flexible membrane provides a simple yet reliable structure that eliminates jamming risks by using elastic deformation instead of mechanical moving parts. The membrane can freely deform and return without the friction and wear issues associated with unitary mechanical components.
Solution Approach 2:
The flexible membrane serves itself by using its own elastic characteristics to return to the normal position after deformation. This self-service mechanism eliminates the need for separate return springs or actuators, simplifying the structure while maintaining reliability.
3Reliability
If a check valve is added to control one-way liquid flow from working chamber to auxiliary chamber, then vibration damping is enhanced, but the device complexity increases
Solution Approach 1:
The check valve uses a flexible elastomer membrane that vibrates freely between the first structural plate and support grid. This flexible film design provides one-way flow control without requiring complex mechanical valve components, maintaining simplicity while enhancing vibration damping performance.
Solution Approach 2:
The check valve membrane is designed to vibrate freely and respond dynamically to pressure variations in the working chamber. This dynamic behavior allows the valve to open and close automatically based on vibration conditions, enhancing damping performance without requiring external control mechanisms.
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 design reduces jamming risks and simplifies assembly by eliminating the need for complex return mechanisms, while effectively damping vibrations through controlled liquid flow paths and resonance frequencies, enhancing the mount's operational efficiency.
Implementation Method 1
the flexible membrane being arranged for deforming to close the main port
Implementation Method 2
a first flow path equipped with a check valve arranged for only allowing a flow of liquid from the working chamber to the auxiliary chamber
Implementation Method 3
a first liquid-filled restricted passage that has a first resonance frequency
Implementation Method 4
a second liquid-filled restricted passage having a second resonance frequency
Implementation Method 5
an elastomer body connecting the two support members to each other
Data Source
AI summary
A hydraulic anti-vibration mount having two damping modes, is disclosed comprising two support members, an elastomer body that connects the two support members to each other, a working chamber, a first structural plate with a check valve, a calibrated hole, a first restricted passage linking the working chamber to an intermediate chamber, a second structural plate having a main port, a second restricted passage, linking the intermediate chamber to a compensation chamber, an auxiliary chamber supplied by the check valve and emptied by the calibrated hole, and equipped with a flexible membrane arranged for deforming and closing the main port, to switch between the two damping modes.