Double-liquid controllable damper

Abstract

The invention discloses a double-liquid controllable damper. The double-liquid controllable damper comprises an outer sleeve and an inner sleeve; the inner sleeve is arranged in the outer sleeve, wherein the side wall of the inner sleeve is connected with the outer sleeve through a plurality of springs, and the top and the bottom of the inner sleeve are attached to the top and the bottom of the outer sleeve; an excitation coil is wound around the inner wall of the outer sleeve, and a magnetorheological fluid fills the portion between the inner sleeve and the outer sleeve; a shear thickening fluid fills the interior of the inner sleeve, a ball seat is arranged at the bottom of the inner sleeve, a ball core is arranged in a groove of the ball seat and is connected with the ball seat througha wire, a through hole is formed in the bottom of the groove, an air pump is arranged in the ball seat, and an air pump air outlet communicates with the through hole; and a vibration sensor is arranged on the inner wall of the inner sleeve and is connected with an external controller through a wire, and when the vibration frequency is lower than a threshold value, a controller air pump is startedso that gas can be vented to the ball core, and the ball core constantly rotates and vibrates up and down. The double-liquid controllable damper integrates the advantages of both the magnetorheological fluid and the shear thickening fluid, and through synergistic action between both fluids, excellent mechanical properties can be achieved; and the structure is simple, assembling and disassembly areconvenient, and self-resetting can be realized.

Description

technical field [0001] The invention belongs to the technical field of engineering structure vibration control, and relates to a two-liquid controllable damper. Background technique [0002] Shock and vibration are relatively common natural phenomena, which widely exist in industrial production and mechanical equipment. In order to avoid the interference and damage caused by it, the energy absorption and dissipation of shock and vibration are paid more attention. Magneto-rheological fluid is a smart material with excellent performance. When subjected to a magnetic field, the magnetic particles in it are arranged in chains along the direction of the magnetic field and become Bingham solid plastics. The apparent viscosity increases. Once the magnetic field is removed, the fluid returns The response time to the original state of Newtonian fluid with good fluidity is only a few milliseconds. This continuous, reversible, rapid and easy-to-control viscosity change characteristic ...

AI Technical Summary

Problems solved by technology

The shear thickening fluid damper is to use the shear thickening characteristics of the shear thickening fluid to protect the main structure against the impact load response. However, the damping force and stiffness of the shear thickening fluid damper are due to the shear The thickener does not undergo shear thickening behavior, so its control effect is not ideal

In addition, most of the dampers after experiencing strong vibration are damaged to varying degrees. Because the damage is irreversible or because the installation and disassembly are complicated, a lot of energy and financial resources are spent.

Images