A magnetorheological fluid self-generating transmission device driven by shape memory alloy

Abstract

The invention discloses a magneto-rheological fluid self-generating transmission device driven by a shape memory alloy, which includes an active part, a driven part, an excitation coil and a DC generator, and the active part includes a driving shaft and a driving inner mounted on the driving shaft. Cylinder; the driven part is set on the driven shell outside the active inner cylinder, and the left end cover and the right end are fixedly connected to both ends of the driven shell and form the magnetorheological fluid working chamber between the active inner cylinder and the driven shell The cover and the excitation coil are installed outside the working chamber, and the outer surface of the left end cover has a protrusion extending along the axial direction of the drive shaft. The DC generator is installed on the protrusion and connected with the excitation coil through wires. The transmission device can not only adaptively adjust the transmission performance of the magnetorheological fluid, but also reduce the power loss caused by overcoming the viscous force of the magnetorheological fluid, protect the physical and chemical properties of the magnetorheological fluid, and also has It has the advantages of compact structure, convenient loading and unloading, energy saving and environmental protection.

Description

technical field [0001] The invention relates to a mechanical transmission device, in particular to a magneto-rheological fluid self-generating transmission device driven by a shape memory alloy. Background technique [0002] Magnetorheological fluid is a two-phase suspension that can change from fluid to solid or gel state under the action of an external magnetic field. The change of magnetorheological fluid is reversible. When no magnetic field is applied, it behaves as Newtonian fluid; Under the action of an external magnetic field, it behaves as a Bingham plastic fluid (Bingham plastic fluid is a kind of non-Newtonian fluid, which is a viscoplastic material. Under the action of low stress, it behaves as a rigid body, but under high stress Under the action, it will flow like a viscous fluid), has a certain shear force and yield stress, and with the increase of the external magnetic field strength, the shear force and yield stress of the magnetorheological fluid increase, a...

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Problems solved by technology

[0004] In summary, although researchers have done a lot of research on the individual applications of magnetorheological fluids and shape memory alloys in the field of transmission engineering, the research on the combined application of shape memory alloys and magnetorheological fluids in transmissions and the magnetic flow There is still little research on the self-adaptive regulation of variable fluid transmission

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