Hydraulic speed increasing magnetic rheological vibration damper

The utility model is a magneto-rheological damping device which can be used for vibration reduction of building structures such as offshore platforms and high-rise buildings, etc. A big hydraulic cylinder and a small hydraulic cylinder are connected with a magneto-rheological damper sequentially and a piston rod of the big hydraulic cylinder serves as the velocity input end. The action of amplifying the velocity by the hydraulic cylinders with different internal diameters is utilized to pass the structure relative velocity to the magneto-rheological damper to make the energy dissipation capacity of the magneto-rheological damper sufficiently performed. The device is characterized in that the utility model has a simple structure and a high precision, responds quickly and can be easily processed.