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16 March 2018 Torque enhancement possibilities for energy-efficient MRF-based coupling elements
Christian Hegger, Jürgen Maas
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Proceedings Volume 10595, Active and Passive Smart Structures and Integrated Systems XII; 1059531 (2018) https://doi.org/10.1117/12.2302393
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States
Abstract
The requirements for transmission and coupling elements are rising continuously. Our previous investigations were focused on the elimination of viscous induced drag-torques in coupling elements based on magnetorheological fluids by a MR-fluid movement control. For a further reduction of weight and space requirements a design of a magnetic circuit with a serpentine flux guidance was introduced last year. For a further enhancement of the torque density a design based on multiple shear gaps is proposed in this contribution. Due to the MR-fluid movement control using partially filled shear gaps a simple arrangement of several coaxial shear gaps is not applicable. Instead, each shear gap has to be separated by a novel MR-fluid sealing, which allows also a drag- torque free operation above certain rotational speeds. Combining these features result in a MRF-based coupling element with an enhanced torque density at simultaneously reduced drag-torque.
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Christian Hegger and Jürgen Maas "Torque enhancement possibilities for energy-efficient MRF-based coupling elements", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 1059531 (16 March 2018); https://doi.org/10.1117/12.2302393
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KEYWORDS
Magnetism
Magnetorheological finishing
Actuators
Particles
Mechatronics
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