Rotary type magneto-rheological damper

Abstract

The invention discloses a rotary type magneto-rheological damper comprising a first rotating shaft, a second rotating shaft and a third rotating shaft. The first rotating shaft is fixedly provided with a first gear. The second rotating shaft is fixedly provided with a second gear and a third gear. The third rotating shaft is fixedly provided with a fourth gear. A damping device is arranged below the fourth gear of the third rotating shaft. The damping device comprises an upper cover, a lower cover, a piston and a sleeve. The third rotating shaft penetrates through the upper cover, the lower cover and the piston. The piston is internally provided with four reversed-T-shaped cavities which are uniformly distributed at the angular interval of 90 degrees in the axial direction. An annular groove is formed in the sleeve, and the annular groove and each reversed-T-shaped cavity have the same axial height. A T-like moving block is arranged in each reversed-T-shaped cavity and can move in thereversed-T-shaped cavity and the annular groove. The rotary type magneto-rheological damper is simple in structure and can achieve a good damping effect in a rotary type mechanical structure.

Description

technical field [0001] The invention relates to the technical field of dampers, in particular to a rotary magnetorheological damper. Background technique [0002] Magneto-rheological fluid is a suspension formed by mixing tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic liquid. Under the condition of zero magnetic field, the particle distribution of magnetorheological fluid is chaotic, showing the characteristics of Newtonian fluid with low viscosity; under the action of magnetic field, it is arranged in a regular chain or chain bundle, which can instantly change from Newtonian fluid to high Viscosity is difficult to flow plastic Bingham fluid. This change of the magnetorheological fluid is reversible, and the magnitude of the damping force can be controlled by controlling the strength of the magnetic field. [0003] The magnetorheological dampers that are commonly used in the market are generally linear magnetorheol...

AI Technical Summary

Problems solved by technology

This piston rod magneto-rheological damper has a large length and size, and its installation is easily limited by its volume

The damping and vibration reduction effect of the small damper of this structure cannot meet the design requirements of shock absorption; and the piston rod type magneto-rheological damper is not suitable for the shock absorption of the rotary mechanism.

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