Vibration Isolator with Pneumatic Spring and Bending Rod
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Solution Overview
Problem
Existing pneumatic vibration isolation systems face challenges in achieving a high natural frequency above 5 Hz while maintaining high vertical and horizontal rigidity, which is essential for rapid stabilization, and they often require significant effort to compensate for changes in weight.
Innovation Solution
A vibration isolator design incorporating a pneumatic spring with a piston and a bending rod or articulated pendulum, coupled with leaf springs, allows for independent adjustment of horizontal and vertical stiffness, enabling a natural frequency of over 5 Hz through the use of exchangeable components and active control via sensors and servo valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pneumatic springs are used for level regulation in vibration isolation systems, then leveling is possible, but the natural frequency cannot be maintained above 5 Hz due to limited weight compensation capability
Solution Approach 1:
The vibration isolator is segmented into distinct functional components: a pneumatic spring for level regulation, a bending rod for horizontal stiffness, and leaf springs for vertical stiffness. This segmentation allows each component to be optimized independently, enabling the pneumatic spring to provide leveling while other components maintain the natural frequency above 5 Hz.
Solution Approach 2:
The system employs exchangeable bending rods and leaf springs that can be dynamically adjusted or replaced to modify stiffness characteristics. This dynamic adaptability allows the system to maintain optimal natural frequency performance while the pneumatic spring provides continuous level regulation.
2Reliability
If high vertical and horizontal rigidity is achieved to obtain short stabilization times, then natural frequency exceeds 5 Hz, but level compensation becomes difficult
Solution Approach 1:
The isolator separates level compensation function (pneumatic spring) from stiffness support function (bending rod and leaf springs). This segmentation allows the pneumatic spring to handle level compensation independently while the rigid mechanical components maintain high natural frequency for rapid stabilization.
Solution Approach 2:
The pneumatic spring acts as an intermediary element between the load and the rigid support structure. It absorbs the level regulation function, allowing the bending rod and leaf springs to focus on providing stable, high-frequency support without being burdened by level compensation requirements.
3Adaptability or versatility
If exchangeable bending rods and leaf springs are used to adjust stiffness independently, then adaptability increases, but device complexity increases
Solution Approach 1:
The isolator is divided into modular, exchangeable components (bending rods and leaf springs) that can be independently selected and replaced. This segmentation enables straightforward stiffness adjustment without requiring complex integrated mechanisms, as each component type serves a specific stiffness function.
Solution Approach 2:
Stiffness parameters are adjusted by changing physical components rather than modifying existing structures. Different bending rods and leaf springs with varying geometric parameters can be exchanged to achieve desired stiffness characteristics, simplifying the adjustment process despite the availability of multiple configurations.
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 achieves a high natural frequency in both vertical and horizontal directions, facilitating rapid stabilization and easy adaptation of the isolator, while ensuring precise stiffness and compactness.
Implementation Method 1
a piston which is supported in a working chamber by means of fluid pressure
Implementation Method 2
The horizontal rigidity of the system is essentially determined by the bending beam or the buckling pendulum, i.e. the rigidity in the horizontal direction when installed
Implementation Method 3
The rigidity of the isolator in the vertical direction is determined by the at least one leaf spring
Data Source
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AI summary
The invention relates to a vibration isolator with a pneumatic spring. This comprises a leaf spring assembly for vertical isolation and a bending rod or a hinged pendulum for horizontal isolation.