Magnetorheological Mount for Dynamic Oscillation Damping
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Solution Overview
Problem
Hydraulic mounts lack the ability to dynamically modulate their response to stresses over time, limiting their flexibility in adapting to varying operational conditions.
Innovation Solution
A hydraulic mount utilizing a magnetorheological fluid and an electromagnetic system to actively control viscosity in response to magnetic fields, allowing for instantaneous changes in viscosity and dynamic behavior without altering the mount's geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional hydraulic mount with fixed geometry is used, then the mount structure is simple and reliable, but the mount cannot dynamically modulate its response to stresses over time
Solution Approach 1:
The patent changes the physical parameter of the fluid (viscosity) in response to external stimuli (magnetic field). The magnetorheological fluid transitions between different viscosity states based on magnetic field intensity, allowing the mount to dynamically adjust its mechanical response without changing its physical geometry or structure.
Solution Approach 2:
The patent uses a magnetorheological fluid, which is a composite material consisting of ferromagnetic particles suspended in a carrier fluid. This composite material provides the unique property of being able to change its rheological behavior (viscosity) in response to magnetic fields, enabling dynamic modulation while maintaining a relatively simple mount structure.
2Adaptability or versatility
If the mount geometry is changed to alter dynamic behavior, then the response to stresses can be modified, but the resonance frequency and shape of the mount change
Solution Approach 1:
Instead of changing the geometric parameters of the mount (shape, size, conduit geometry), the invention changes the physical parameter of the fluid (viscosity) in response to magnetic field intensity. This allows dynamic behavior modification while keeping the mount's resonance frequency and shape constant.
3Extent of automation
If electromagnetic components are added to control fluid viscosity, then active control is achieved, but product strength is reduced
Solution Approach 1:
The patent replaces traditional mechanical control systems (which would require physical actuators, pistons, and moving parts) with a magnetic field-based control system. The electromagnetic coil generates a magnetic field that directly affects the magnetorheological fluid's viscosity, providing active control without introducing mechanical components that would compromise structural strength.
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
Enables active, time-variable control of the mount's dynamic behavior, increasing dynamic rigidity without changing the resonance frequency or shape, and avoids the use of electromagnetic components for enhanced product strength.
Implementation Method 1
The fluid is a magnetorheological fluid. A magnetorheological fluid is a material that displays a change in rheological behaviour following the application of a magnetic field. The application of a magnetic field and the intensity thereof are therefore able to substantially change, in a reversible way, the viscosity of a similar fluid
Data Source
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AI summary
A mount for damping oscillations comprising: -a first chamber (40) deformable under the action of said oscillations; -a second chamber (5); -a conduit (60) that sets the first and the second chamber (40, 5) into 5 communication. -an incompressible fluid suitable for moving between the first and the second chamber (40, 5) through said conduit (60). The fluid is a magnetorheological fluid. The mount (1) comprises a means (11) for regulating the dynamic behaviour of the mount itself and, in turn, 10 comprising means (12) for generating a magnetic field for exciting the magnetorheological fluid.