Magnetorheological Damper Fluid Passage Layout for Wide Load Control
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Solution Overview
Problem
Existing damper devices using magneto-rheological fluids face challenges in balancing size reduction with the ability to handle a wide range of applied loads, as increasing the number or size of electromagnets to manage large loads leads to increased size, while reducing electromagnet size narrows the control range of damping force.
Innovation Solution
A damper device design featuring a cylinder with compartments, a movable piston, and multiple electromagnets with fluid passages that include first and second fluid passages, where the magnetic field is applied through electromagnets to increase fluid viscosity and resistance, utilizing a compact configuration with angled and interconnected fluid passages to enhance flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large number of electromagnets or large-sized electromagnets are arranged to handle large loads, then the damping force control range is improved, but the device size increases
Solution Approach 1:
The fluid passage is positioned to extend through the iron core of the electromagnet, utilizing the internal space of the electromagnet structure. This nesting arrangement allows the fluid passage to be integrated within the electromagnet's volume, enabling compact device design while maintaining the capability to handle large loads through effective magnetic field application to the magneto-rheological fluid.
Solution Approach 2:
The invention transitions from arranging electromagnets externally around the fluid passage to positioning the fluid passage through the iron core of the electromagnet. This spatial reconfiguration optimizes the use of three-dimensional space, reducing the overall device footprint while preserving the electromagnet's ability to control damping force across a wide range.
2Volume of stationary object
If the size of electromagnets is reduced to decrease device size, then the device size is reduced, but the control range of damping force is narrowed
Solution Approach 1:
By nesting the fluid passage within the iron core of the electromagnet, the design maximizes the utilization of the electromagnet's internal volume. This allows smaller electromagnets to maintain effective control over the magneto-rheological fluid, preserving the damping force control range despite the reduced device size.
Solution Approach 2:
The invention changes the spatial parameters of the fluid passage positioning, moving it from an external arrangement to an internal arrangement through the iron core. This parameter change enables more efficient magnetic field application to the fluid, allowing compact electromagnets to achieve the same damping control range as larger electromagnets would provide in traditional 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
The design achieves a compact damper device capable of handling a wide range of loads by intensifying fluid viscosity and flow resistance, allowing for adjustable damping forces through a versatile and efficient magnetic field application.
Implementation Method 1
an electromagnet including an electromagnetic coil and an iron core inserted into the electromagnetic coil, wherein a magnetic field is applicable to the fluid passage by energizing the electromagnetic coil
Implementation Method 2
a cylinder including a magneto-rheological fluid with a viscosity that is changeable in accordance with magnetic field application
Data Source
AI summary
A magneto-rheological damper includes a cylinder including a magneto-rheological fluid with a viscosity that is changeable in accordance with magnetic field application, a piston movable in the cylinder and partitioning the cylinder into first and second compartments, a fluid passage enabling the first compartment and the second compartment to communicate with each other, and an electromagnet including an electromagnetic coil and an iron core pipe. A magnetic field is applicable to the fluid passage by energizing the electromagnetic coil to increase a flow resistance of the magneto-rheological fluid in the fluid passage so that movement resistance is applied to an object connected to the piston. The fluid passage includes: a first fluid passage facing one end portion of the iron core pipe and to which the magnetic field is applied by the electromagnetic coil, and a second fluid passage extending through the iron core pipe.