Magnetorheological Vibration Damper Layout for Compact Mounting
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Solution Overview
Problem
Existing fluid-filled vibration damping devices face challenges with increased size due to the installation of magnetic units on the outer cylindrical member, complicating the seal structure and potentially enlarging the installation portion.
Innovation Solution
The magnetic unit is installed on the outer circumference of the outer cylindrical member, with the magnetic field generation part offset in the axial direction, allowing the outer mounting member to be positioned away from the magnetic field generation part, thereby reducing the overall size of the installation portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic unit is installed on the outer circumferential surface of the outer cylindrical member, then the magnetic field can be applied to the magnetorheological fluid, but the installation portion size increases
Solution Approach 1:
The magnetic gap part is positioned axially offset from the magnetic field generation part, utilizing the axial dimension to separate the magnetic field application zone from the mounting zone. This dimensional separation allows the outer mounting member to be installed at a different axial location, preventing radial size increase while maintaining magnetic field application effectiveness to the magnetorheological fluid
2Reliability
If the magnetic unit is installed on the outer circumferential surface of the outer cylindrical member, then the magnetic field can be applied to the magnetorheological fluid, but the seal structure becomes complicated
Solution Approach 1:
The magnetic gap part is extracted as a separate functional component from the magnetic field generation part, allowing it to be positioned independently on the outer circumferential surface. This extraction enables the seal structure to be simplified by isolating the magnetic field application function from the mounting structure, reducing the complexity of integrating both functions into a single complex assembly
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 enables effective control of vibration damping properties and support rigidity while minimizing the increase in size, providing enhanced design freedom and efficient magnetic field application to the magnetorheological fluid.
Implementation Method 1
a magnetic field generation part that forms a magnetic field by being supplied with power
Implementation Method 2
a magnetic path formation part that induces a magnetic flux of the magnetic field formed by the magnetic field generation part
Implementation Method 3
a magneto-rheological fluid whose rheological degree changes in accordance with the magnitude of an acting magnetic field
Data Source
AI summary
In a fluid-filled vibration damping device in which multiple fluid chambers filled with a magnetic functional fluid communicate with each other by an orifice path, and a magnetic unit applying a magnetic field to the orifice path is provided in a state of being externally fitting to an outer cylindrical member, the magnetic unit includes a magnetic field generation part forming a magnetic field and a magnetic path formation part inducing a magnetic flux, the magnetic field is applied from a magnetic gap part of the magnetic path formation part arranged on an outer circumference of the orifice path to the orifice path, and on an outer circumferential surface of the outer cylindrical member, an outer mounting member linking between the outer cylindrical member and a vibration damping linking target member is installed to an installation part which is offset from the magnetic field generation part in an axial direction.