High-energy consumption self-decoupling magnetorheological damper

Abstract

The invention relates to a high-energy consumption self-decoupling magnetorheological damper with damping force decoupling property and failure self-protection function. The damper not only has high energy consumption and output, but also can effectively prevent subsidence of magnetorheological fluid, therefore, the invention is suitable for civil engineering structures. The damper mainly comprises a master cylinder body (6), an auxiliary cylinder body (13), a main piston (8), two auxiliary pistons (23), a piston rod (25), and novel composite-structure energy accumulators (14 and 15). Permanent magnets (9) arranged in the main piston (8) and the two auxiliary pistons (23) can effectively prevent subsidence of magnetorheological fluid, and can still provide corresponding damping force under the condition of power supply failure to enhance the safety of the structure. Magnetic circuit guiding components improve the utilization factor of the magnetic field. A mechanical spring self-decoupling device is mainly operated on the condition that the damper is under low-frequency driving, thereby overcoming the disadvantage of low output of the damper under low-frequency driving.

Description

technical field [0001] The invention mainly relates to the field of dampers, and is a damper used for anti-seismic (vibration) of civil engineering structures, especially a high-energy-consuming shock-absorbing (vibration) device with damping force decoupling characteristics and failure self-protection functions. Background technique [0002] Strong earthquakes have caused huge disasters to people all over the world. It is important to seek more reasonable and effective anti-seismic (vibration) methods, and to study safer, economical and reliable energy-consuming shock-absorbing (vibration) components, which are important for effectively reducing earthquake disasters. Practical significance. As an important branch of current smart material research, magnetorheological fluid has broad application prospects in the field of vibration control. It is a controllable fluid, which is a stable suspension formed by dispersing non-colloidal fine particles in an insulating carrier liqu...

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Problems solved by technology

[0004] In addition, a key factor that limits the application of magnetorheological dampers in the vibration control of civil engineering structures is the settlement stability of magnetorheological fluids. Since civil structures have been standing for a long time, and the time of encountering earthquakes and strong winds is extremely short, this problem It is even more prominent that the traditional single current control and single piston movement mode is difficult to effectively prevent the settlement of magnetorheological fluid

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