Active Vibration Mount Layout Using Dual Fluid Chambers
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Solution Overview
Problem
Conventional active vibration control devices face issues with increased manufacturing costs and weight due to larger liquid chambers filled with magneto-viscoelastic fluid, which can lead to performance degradation from magnetic powder deposition over time.
Innovation Solution
The design incorporates an outer and inner hollow cylinder with a magnetic field generator and flexible member, separating two liquid chambers to control magneto-viscoelastic fluid flow, reducing the volume of magneto-viscoelastic fluid needed and preventing magnetic powder deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the volume of liquid chambers is increased to improve performance of response to amplitude by inputted vibration, then the damping performance is improved, but the weight and manufacturing cost increase due to more magneto-viscoelastic fluid being required
Solution Approach 1:
The liquid chamber is divided into a first liquid chamber filled with magneto-viscoelastic fluid and a second liquid chamber filled with ordinary liquid. This segmentation allows the device to use a smaller volume of expensive, heavy magneto-viscoelastic fluid while maintaining damping performance through the combined action of both fluid types.
Solution Approach 2:
A flexible member is introduced as an intermediary between the first and second liquid chambers. This flexible member transmits force and enables interaction between the two fluid chambers, allowing the ordinary liquid in the second chamber to contribute to damping while reducing the overall requirement for magneto-viscoelastic fluid.
2Reliability
If the volume of liquid chambers is increased to improve performance of response to amplitude by inputted vibration, then the damping performance is improved, but the manufacturing cost increases due to more magneto-viscoelastic fluid being required
Solution Approach 1:
The liquid chamber is divided into a first liquid chamber filled with magneto-viscoelastic fluid and a second liquid chamber filled with ordinary liquid. This segmentation allows the device to use a smaller volume of expensive, heavy magneto-viscoelastic fluid while maintaining damping performance through the combined action of both fluid types.
Solution Approach 2:
A flexible member is introduced as an intermediary between the first and second liquid chambers. This flexible member transmits force and enables interaction between the two fluid chambers, allowing the ordinary liquid in the second chamber to contribute to damping while reducing the overall requirement for magneto-viscoelastic fluid.
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 configuration enhances performance in responding to external forces without increasing the volume of magneto-viscoelastic fluid, maintaining effective damping properties while reducing the risk of magnetic powder deposition and associated performance degradation.
Implementation Method 1
two liquid chambers filled with magneto-viscoelastic fluid communicated with each other via a flow path and includes an exciting coil to provide a magnetic circuit in a direction intersecting the flow path. The active vibration control device varies density of magnetic flux by the exciting coil, when the magneto-viscoelastic fluid flows from one of the two liquid chambers toward the other in response to the magnitude of amplitude by inputted vibration
Implementation Method 2
a magnetic field generator to generate a magnetic field
Implementation Method 3
the first liquid chamber is separated from the second liquid chamber by a flexible member, and a portion of the first liquid chamber works as a flow path of the magneto-viscoelastic fluid
Data Source
AI summary
An active vibration control device includes: an outer hollow cylinder; an inner hollow cylinder arranged radially inside the outer hollow cylinder; a magnet coil (magnetic field generator) to generate a magnetic field; a magnetic material to provide a magnetic circuit by the magnetic field; a first liquid chamber filled with magneto-viscoelastic fluid; and a second liquid chamber adjacent to the first liquid chamber and filled with liquid, wherein the magnet coil, the magnetic material, the first liquid chamber, and the second liquid chamber are provided radially between the inner hollow cylinder and the outer hollow cylinder, the first liquid chamber is separated from the second liquid chamber by a flexible member, and the first liquid chamber has an orifice, through which the magnetic circuit is provided.