Magneto-rheological shock absorber without external power supply

Abstract

The invention provides a magneto-rheological vibration damper without an externally-connected power supply, comprising an earring, a supporting disc, a piezoelectric pile structure, a lower gland, a bottom end cover, an air bag, a cylinder body, a piston with winded coils, a piston rod, an upper end cover, a spring, an upper gland, a locking member, and an electric energy conditioning module. Wherein, one end of the spring is connected with a piezoelectric generating device, the other end is connected with the piston rod, when the piston rod moves up and down along the cylinder body under outside vibration, external force is applied to the piezoelectric generating device via pressing of a spring mechanism. Under the effect of pressure, the piezoelectric generating device generates electric energy, and the electric energy conditioning module converts high voltage AC electric energy generated by the piezoelectric generating device to low voltage DC electric energy, and applies the low voltage DC electric energy to the piston coils to generate an excitation magnetic field, make magneto-rheological fluid solidified, and improve damping force, thereby reducing vibration of the piston rod. compared with a conventional magneto-rheological damper structure, the magneto-rheological vibration damper without an externally-connected power supply can capture outside vibration energy to supply power to itself, forming a self-energy-providing magneto-rheological vibration damper system.

Description

technical field [0001] The invention relates to a magnetorheological damper, in particular to a magnetorheological damper that does not require an external power supply. Background technique [0002] The magnetorheological shock absorber with magnetorheological liquid level working medium is a kind of semi-active structural vibration control device with excellent performance. It has simple structure, fast response, large dynamic range and good durability. As a new generation of intelligent vibration control device, the magnetorheological damper has both the reliability of passive control and the strong adaptability of active control. Through certain control laws, it can achieve a control effect that is very close to the active control system. It is a control technology with good engineering application prospects. The magnetorheological fluid needs to be excited by a magnetic field. The magnetorheological shock absorber excites the magnetorheological fluid by applying an ele...

AI Technical Summary

Problems solved by technology

Since the magneto-rheological damper needs external electric energy input when it works, this will complicate the whole system and increase the application cost of magnetorheological technology, especially in construction projects that require a large number of magnetorheological dampers to combine controlled place

At the same time, relying on external power input will also reduce the reliability of the magnetorheological damper and increase the risk of control failure

In general, relying on external power input will complicate the magnetorheological semi-active control system, increase the cost, and reduce the reliability, which greatly hinders the large-scale popularization and application of magnetorheological technology.

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