Double-cylinder and double-outlet-rod flowing type magnetorheological damper

Abstract

The invention discloses a double-cylinder and double-outlet-rod flowing type magnetorheological damper. The double-cylinder and double-outlet-rod flowing type magnetorheological damper comprises a piston cylinder and an electromagnet cylinder; the piston cylinder and the electromagnet cylinder are both filled with magnetorheological fluid; a piston is arranged inside the piston cylinder; a pistonrod connected to the piston penetrates out of the piston cylinder in a sealed mode; cavities on two sides of the piston inside the piston cylinder communicate with the electromagnet cylinder through guide pipes; an electromagnet is arranged inside the electromagnet cylinder; and a magnetic conductive area generated by the electromagnet is used for controlling the magnetorheological fluid to generate the magnetorheological effect. Mounting of a special maintenance device is avoided, and the double-cylinder and double-outlet-rod flowing type magnetorheological damper has high reliability in theuse period compared with ordinary mechanical elements. Needed energy is extremely low, and even if energy is interrupted in an earthquake, the double-cylinder and double-outlet-rod flowing type magnetorheological damper still can be used as a passive energy dissipation device to continue to play a control role; and the magnetorheological fluid in the damper can achieve the alternate changes of free flow, viscous flow and semi-solid state by controlling the changes of an electric field and a magnetic field within the time of several milliseconds.

Description

technical field [0001] The invention relates to the field of structural vibration control, in particular to a flow type magnetorheological damper with double cylinders and double outlet rods. Background technique [0002] With the rapid development of modern society and economy, people have put forward stricter requirements on the safety and usability of buildings than before, such as: in order to ensure the smooth progress of rescue and relief work after the earthquake, hospitals, communication centers, fire-fighting facilities and Important traffic bridges not only require that the structure not be severely damaged during an earthquake, but also that they cannot lose their normal use functions; modern high-precision industrial plants, computing centers and other buildings are required to ensure that indoor expensive equipment and instruments are not damaged. The structural response of buildings under earthquakes cannot be too large. Based on this, the research and applica...

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Problems solved by technology

[0004] However, domestic scholars still have many problems in the development of new magnetorheological dampers. At present, the magnetorheological dampers used in the field of structural vibration control in China are mostly purchased from foreign countries. There are few self-developed products. Most of the magnetorheological dampers have problems such as unreasonable structural design, magnetic induction intensity and distribution that cannot meet the requirements for use, etc.

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