Variable-rigidity flexible coupling based on magnetorheological grease

Abstract

The invention discloses a variable-rigidity flexible coupling based on magnetorheological grease. The flexible coupling comprises a driving shaft connection disc, an electromagnetic coil, N studs, N pieces of magnetorheological grease and a driven shaft connection disc. N corresponding first hollow through holes and second hollow through holes are formed in the disc faces of the driving shaft connection disc and the driven shaft connection disc correspondingly. A groove is formed in the side face of the driving shaft connection disc. The electromagnetic coil is wound in the groove. The magnetorheological grease is of a middle-through sleeve structure. The studs penetrating through the first hollow through holes and the second hollow through holes are sleeved with the magnetorheological grease, and meanwhile the two ends of the magnetorheological grease are clamped in the first hollow through holes and the second hollow through holes correspondingly. The two ends of the studs are lockedby nuts, and in this way the driving shaft connection disc and the driven shaft connection disc are connected to form the flexible coupling through the N pieces of magnetorheological grease. Throughthe flexible coupling, the oscillation phenomenon caused by assembly error can be restrained to a certain extent, then loss in the energy transmission process is lowered, and stability and accuracy ofdevice work are improved.

Description

technical field [0001] The invention belongs to the field of power transmission, in particular to a flexible coupling with variable stiffness based on magneto-rheological grease. Background technique [0002] A coupling is a component that connects two rotary shafts so that the two rotary shafts rotate simultaneously when transmitting motion and power. At present, the common coupling is a rigid coupling. Due to reasons such as poor alignment, the axes of the two rotary shafts connected by the rigid coupling often undergo axial displacement, meridian displacement and angular displacement, resulting in mechanical vibration and Noise, which can cause mechanical damage in severe cases. In addition, because the two rotary shafts are rigidly connected together, it often causes mechanical torsional vibration, which greatly reduces the mechanical life. [0003] Magnetorheological grease (MR grease) is a new branch of magnetorheological materials. It is composed of high molecular ...

AI Technical Summary

Problems solved by technology

At present, the common coupling is a rigid coupling. Due to reasons such as poor alignment, the axes of the two rotary shafts connected by the rigid coupling often undergo axial displacement, meridian displacement and angular displacement, resulting in mechanical vibration and Noise, which can cause mechanical damage in severe cases

In addition, because the two rotary shafts are rigidly connected together, it often causes mechanical torsional vibration, which greatly reduces the mechanical life

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