Magnetorheological Torque Generation With Integrated Volume Compensation
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Solution Overview
Problem
Existing magnetorheological fluid devices require an additional flexible member to adjust the sealed space volume, leading to increased component count and manufacturing process changes.
Innovation Solution
A torque generation device with a rotor, an external member, a magnetically responsive material, a magnetic field generating unit, and an adjusting unit that allows the capacity of the adjustment space to change with the volume of the magnetically responsive material without adding new components or significantly altering the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible member is added to adjust the sealed space volume, then the device can follow volume changes of the magnetorheological fluid, but the number of components increases and the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the volume adjustment function with the sealing function by integrating the adjusting sealing member into the existing sealing structure. The adjusting sealing member is disposed in a groove of the sealing member, merging two functions (sealing and volume adjustment) into a single integrated component, thereby avoiding the need for additional flexible members while maintaining the ability to follow volume changes of the magnetorheological fluid
Solution Approach 2:
The sealing member is designed to perform multiple functions: it provides sealing between the magnetorheological fluid and the external environment, and simultaneously serves as a housing for the adjusting sealing member that controls the sealed space volume. This multi-functional design eliminates the need for separate flexible members while achieving the same volume adjustment effect
2Reliability
If a flexible member is added to adjust the sealed space volume, then the device can follow volume changes of the magnetorheological fluid, but the manufacturing process changes significantly
Solution Approach 1:
The adjusting sealing member is integrated into the groove of the sealing member, combining the volume adjustment mechanism with the sealing structure. This integration allows both components to be manufactured and assembled together as a single unit, significantly simplifying the manufacturing process compared to adding a separate flexible member
Solution Approach 2:
The adjusting sealing member automatically adjusts the sealed space volume in response to volume changes of the magnetorheological fluid without requiring external control mechanisms. The sealing member itself provides the adjustment function through its integrated structure, eliminating the need for complex manufacturing processes required for separate flexible members and control systems
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 stable resistance (torque) to be maintained even with changes in temperature or over time, by adjusting the sealed space volume to match the volume changes of the magnetically responsive material.
Implementation Method 1
a magnetically responsive material disposed in a gap between the rotor and the external member; a magnetic field generating unit that generates a magnetic field passing the magnetically responsive material
Data Source
AI summary
A torque generation device includes a rotor connected to a shaft and rotatable about a rotary axis of the shaft; an external member disposed outside the rotor and rotatable about the rotary axis relative to the rotor; a magnetically responsive material in a gap between the rotor and external member; a magnetic field generating unit generating a magnetic field passing the magnetically responsive material; and an adjusting unit between the shaft and external member along an outer circumference of the shaft, wherein the adjusting unit has a containing space where an adjusting sealing member is provided, the magnetically responsive material is sealed in the gap, containing space, and path connecting these and in an adjustment space from a position where the adjusting sealing member is provided to the path, and a capacity of the adjustment space is changeable according to a change in volume of the magnetically responsive material.