Liquid Sealed Bushing Multi-Resonance Orifice Design
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Solution Overview
Problem
Conventional liquid sealed bushings with multiple liquid chambers and orifices face limitations in creating a large number of resonances due to restrictions in the number of liquid chambers and orifices, which hinders the achievement of strong resonance and broad resonance frequency ranges.
Innovation Solution
A liquid sealed bushing design featuring an inner and outer cylinder connected by an elastic vibration isolating member, with partitioned liquid chamber groups that create inverse volume variations, and strategically placed orifices that communicate between different liquid chambers to produce multiple resonances, including a third resonance that differs from the first two, thereby increasing the resonance range and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple liquid chambers and orifices are provided to create multiple resonances, then the resonance frequency range is broadened, but the device size increases due to space restrictions
Solution Approach 1:
One orifice is designed to serve multiple resonance functions by connecting different liquid chamber pairs through varying flow paths. The single orifice creates multiple resonances at different frequencies by utilizing different combinations of liquid chambers (first and second chambers for one resonance, first and third chambers for another resonance), eliminating the need for separate orifices for each resonance frequency and thereby reducing device size.
2Adaptability or versatility
If the number of liquid chambers is increased to create more resonances, then more resonance frequencies are achieved, but the device complexity increases
Solution Approach 1:
The single orifice is designed with multiple connection paths to liquid chambers, allowing it to generate multiple resonances. By configuring the orifice to connect the first liquid chamber with both the second liquid chamber (creating first resonance) and the third liquid chamber (creating second resonance), the system achieves multiple resonances without proportionally increasing the number of orifices or overall structural complexity.
Solution Approach 2:
Multiple resonance functions are merged into a single orifice structure. Instead of providing separate orifices for each resonance frequency, the invention combines multiple resonance-generating capabilities within one orifice by establishing different flow paths between the orifice and multiple liquid chambers, thereby simplifying the overall device structure.
3Reliability
If resonance is created only between paired liquid chambers, then the resonance strength is limited, but adding more liquid chambers increases device size
Solution Approach 1:
The single orifice is configured to participate in multiple resonance modes by connecting different liquid chamber combinations. This allows the system to achieve strong resonance effects across multiple frequencies without adding proportional device size, as the same orifice structure serves multiple resonance-generating purposes through different liquid chamber pairings.
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 design enables the creation of more resonances than the number of orifices, broadening the resonance range, enhancing resonance efficiency, and allowing for a more compact and simplified device structure while maintaining strong resonance characteristics.
Implementation Method 1
an elastic vibration isolating member elastically connecting the inner and outer cylinders
Implementation Method 2
the first and second orifices are configured to create two resonances composed of a first resonance by the first orifice and a second resonance by the second orifice
Data Source
AI summary
A first orifice provides a connection between a first liquid chamber and a third liquid chamber that are formed in pairs to cause a volume variation in an opposite direction, and a second orifice provides a connection between a second liquid chamber and a fourth liquid chamber. A first communicating passage communicates between a second liquid chamber side portion of the second orifice and a second liquid chamber neighboring portion of the first orifice. In order of height of an input vibration frequency, a first resonance in the first orifice, a second resonance mainly in the second orifice between an enlarged liquid chamber consisting of the first and second liquid chambers, and the fourth liquid chamber, and a third resonance in a location that the first liquid chamber is connected through the first communicating passage to the second liquid chamber are produced.