Alnico piston-type magneto-rheological damper with single piston rod

Abstract

The invention provides an alnico piston-type magneto-rheological damper with a single piston rod, comprising a working cylinder, a piston, a piston rod and a compensating gasbag, wherein the working cylinder is filled with magneto-rheological fluid; the piston consists of alnico; the middle part of the piston is wound by an exciting coil and a magnetizing / demagnetizing coil; the alnico piston can be magnetized or demagnetized by a control power supply so that the alnico piston has certain magnetic field intensity, therefore, the alnico piston-type magneto-rheological damper with the single piston rod has certain output damping force; and subsequently the output damping force of the alnico piston-type magneto-rheological damper with the single piston rod can be adjusted by changing the size and the direction of a current input in the alnico piston exciting coil.

Description

technical field [0001] The invention belongs to a magneto-rheological damper, in particular to a magneto-rheological damper with a single rod magnetic steel piston. Background technique [0002] The damping force output by ordinary single-rod magneto-rheological dampers can be adjusted remotely and steplessly through the control power supply, but this adjustment requires power consumption at any time, and the output current of ordinary magnetorheological dampers when the control power supply is When zero (that is: the excitation current is zero), because the magnetic field strength in the gap between the piston and the working cylinder is zero, the viscosity of the magnetorheological fluid in the gap is the lowest and the damping force is small. Therefore, once the power supply or piston excitation is controlled If the coil fails, it is difficult to ensure the normal operation of the system due to the small damping force output by the ordinary single-rod magneto-rheological ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing single-rod magneto-rheological damper when the excitation current is zero, the damping force is small and the power consumption is large, the present invention proposes a single-rod magnetic steel piston-type magneto-rheological damper. The magnetic steel piston of the rod magnetic steel piston type magnetorheological damper can be magnetized or demagnetized by the control power supply at any time through the charging and demagnetizing coil. Therefore, firstly, the magnetic steel piston can reach the predetermined working magnetic field strength, and then Then adjust the magnitude and direction of the current output from the control power supply to the excitation coil on the magnetic steel piston, that is, make the direction and magnitude of the electromagnetic field generated by the excitation coil consistent with or opposite to the magnetic field of the magnetic steel piston, that is, by strengthening or weakening the magnetic steel piston The magnetic field strength is used to achieve the purpose of controlling the output damping force of the single-rod magnetic steel piston magneto-rheological damper. Since the magnetic steel piston has reached the predetermined working magnetic field strength or predetermined working strength after magnetization or demagnetization Therefore, the electric energy required for further adjustment of its output damping force will be greatly reduced and save energy. In addition, since the magnetic steel piston already has a certain working magnetic field strength after magnetization or demagnetization, once it is controlled If the power supply or the piston excitation coil fails, the damping force output by the single-rod magnetic steel piston magnetorheological damper can still ensure the normal operation of the system

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