Adjustable-Rigidity Separator for Hydraulic Vibration Reduction
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Solution Overview
Problem
Existing solutions for reducing vibrations in hydraulic systems require large installation spaces, high actuator forces, and can be inefficient in terms of energy usage and service life.
Innovation Solution
A device comprising a separating means and a vibration-influencing unit that mechanically adjusts the rigidity of the separating means to reduce vibrations in hydraulic systems, allowing for rapid, reliable, and low-energy vibration reduction without the need for significant installation space or high actuator forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If membrane accumulators, piston accumulators, or bladder accumulators are used to reduce vibrations, then vibration reduction is achieved, but installation space requirement increases
Solution Approach 1:
The resonator is integrated concentrically around the hydraulic line, with the resonator cavity surrounding the line. This nested configuration allows the vibration reduction device to occupy minimal additional space while effectively treating vibrations in the hydraulic system.
Solution Approach 2:
The invention transitions from using additional volume (accumulators) to using a resonant structure that operates in a different dimensional approach - a quarter-wave resonator where the active volume is minimized by utilizing the resonant frequency relationship between line length and wavelength, rather than requiring large compensating volumes.
2Object-affected harmful factors
If Helmholtz resonators are used to reduce vibrations, then vibration reduction is achieved, but actuator force requirement increases
Solution Approach 1:
The invention extracts the complex actuation mechanism from the resonator system. Instead of using active actuators to adjust Helmholtz resonators, the patent employs a passive quarter-wave resonator design where the resonant frequency is determined by the physical dimensions of the line and cavity, eliminating the need for high actuator forces.
Solution Approach 2:
The quarter-wave resonator is designed to automatically tune to the excitation frequency through its geometric parameters. The system self-regulates vibration reduction based on the hydraulic line's natural frequency characteristics without requiring external actuation forces.
3Object-affected harmful factors
If side-branch or quarter-wave resonators are used to reduce vibrations, then vibration reduction is achieved, but adaptability to changing operating conditions decreases
Solution Approach 1:
The resonator design incorporates dynamic adaptability through its geometric configuration. The quarter-wave resonator's effective length and cavity volume can be adjusted to match changing operating conditions, allowing the resonant frequency to adapt to varying hydraulic system pressures and flow conditions while maintaining vibration reduction effectiveness.
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 device effectively reduces harmonic and frequency-variable vibrations generated by pumps, and can adjust its tuning frequency to match changing natural frequencies of the system, achieving efficient vibration reduction without introducing pressure changes or requiring large installation spaces.
Implementation Method 1
undesired vibrations occur, i.e. fluctuations in pressure, which are transferred through the fluid
Implementation Method 2
a vibration-influencing unit (12), in particular a vibration-reducing unit, which is designed to mechanically adjust the rigidity of the separating means (11)
Implementation Method 3
a separating means (11) which has a side for delimiting a fluid-conducting cavity (10) of the fluid system
Implementation Method 4
what are known as side-branch or quarter-wave resonators are used
Implementation Method 5
In further solutions, Helmholtz resonators are used (analogously to tuned mass dampers)
Data Source
AI summary
A device for reducing vibrations in a hydraulic system may have a separating device which has a side for delimiting a fluid-conducting cavity of the fluid system. The device may also have a vibration-reducing unit, which is designed to mechanically adjust the rigidity of the separating device such that vibrations in the fluid system are reduced.