Liquid-Sealed Vibration Isolator Valve Membrane Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid-sealed type vibration isolators face challenges such as increased cost, size, and reduced damping performance at low frequencies due to the need for urging means like springs and pressure differences, as well as insufficient positional stability and reliability in switching orifice flow channels.
Innovation Solution
A liquid-sealed type vibration isolator with a valve member formed of an elastomeric membrane that undergoes flexural deformation to switch between orifice flow channels, eliminating the need for urging means and enhancing damping performance by adjusting the flow channel based on input amplitude, using a configuration with communication holes and projections to ensure reliable operation and reduced abnormal sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If urging means such as springs are provided to switch orifice flow channels, then the switching function is achieved, but the device complexity and cost increase
Solution Approach 1:
The valve member utilizes the pressure difference between the main liquid chamber and auxiliary liquid chamber to automatically open and close the second orifice flow channel, eliminating the need for external urging means such as springs. The system serves itself by using its own operational pressures to control the switching function.
Solution Approach 2:
The invention uses hydraulic pressure differences within the liquid-sealed vibration isolator to actuate the valve member. The pressure differential between chambers directly controls the opening and closing of the orifice flow channel, replacing mechanical urging means with a hydraulic control mechanism.
2Adaptability or versatility
If urging means such as springs are provided to switch orifice flow channels, then the switching function is achieved, but the size increases
Solution Approach 1:
The valve member utilizes the pressure difference between the main liquid chamber and auxiliary liquid chamber to automatically open and close the second orifice flow channel, eliminating the need for external urging means such as springs. The system serves itself by using its own operational pressures to control the switching function.
Solution Approach 2:
The invention uses hydraulic pressure differences within the liquid-sealed vibration isolator to actuate the valve member. The pressure differential between chambers directly controls the opening and closing of the orifice flow channel, replacing mechanical urging means with a hydraulic control mechanism.
3Device complexity
If pressure difference is used to switch orifice flow channels, then the switching mechanism is simplified, but the damping performance at low frequencies deteriorates
Solution Approach 1:
The valve member is designed to dynamically respond to pressure differences, automatically adjusting its position based on the instantaneous pressure conditions in the liquid chambers. This dynamic response allows the system to maintain optimal damping performance across different operating conditions while using a relatively simple switching mechanism.
Solution Approach 2:
The system changes the operational parameters (pressure difference) to control the switching of orifice flow channels. By utilizing pressure differential as the controlling parameter, the invention achieves both simplified mechanism and reliable damping performance through parameter-based control rather than mechanical actuation.
4Stability of the object's composition
If the valve member is held between wall surfaces, then the positional stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The valve member is constructed as a flexible membrane that can deform under pressure differential. This flexibility allows the valve to achieve reliable sealing and positioning through elastic deformation rather than relying on precise mechanical fits, thereby reducing manufacturing precision requirements while maintaining positional stability during operation.
Solution Approach 2:
The system changes the operational parameters (pressure difference) to control the switching of orifice flow channels. By utilizing pressure differential as the controlling parameter, the invention achieves both simplified mechanism and reliable damping performance through parameter-based control rather than mechanical actuation.
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 allows for effective switching of orifice channel characteristics without additional urging means, reducing costs and size while improving damping performance across a range of frequencies, particularly at low frequencies, and minimizing abnormal sound levels.
Implementation Method 1
a flexible membrane portion (66B) configured to be subjected to flexural deformation by the liquid flow in the second orifice flow channel (60)
Implementation Method 2
configured to carry out a vibration damping function and a vibration insulating function by a liquid flow effect due to the orifice flow channel or by a vibration control effect due to the vibration-isolating base member
Data Source
AI summary
In a liquid-sealed type vibration isolator having a first orifice flow channel 56 and a second orifice flow channel 60, a valve member 66 formed of a rubber elastomeric membrane for opening and closing the second orifice flow channel 60 is provided on a partitioning member 40 so as to be orthogonal to the direction of flow in the second orifice flow channel. The valve member is held at the outer peripheral portion thereof by a wall surface of a valve housing chamber 68, and includes inside the outer peripheral portion thereof a membrane portion 66B which is subjected to the flexural deformation by the liquid flow in the second orifice flow channel to close openings 60C and 60D of the second orifice flow channel. Communicating holes 76 which bring the second orifice flow channel into communication are provided at positions not overlapped with the opening of the membrane portion 66B. Accordingly, the switching of characteristics is enabled with an inexpensive structure.