Multi-free magneto-rheological grease vibration isolator

Abstract

The invention discloses a multi-free magneto-rheological grease vibration isolator which comprises an electromagnetic coil support fixedly connected on a base. An annular groove is formed in the sidewall of the electromagnetic coil support, and an electromagnetic coil is wound in the groove. A groove is formed in the bottom surface of the electromagnetic coil support, and a permanent magnet is embedded in the groove. An inverted trapezoidal slot is formed in the top surface of the electromagnetic coil support, and an inner core column is arranged in the slot. The outer wall of the inner corecolumn is parallel with the wall of the inverted trapezoidal slot, a gap exists between the outer wall of the inner core column and the wall of the inverted trapezoidal slot, and two magneto-rheological greases are arranged in the gap. The side, far away from the inner core column, is fixedly connected with a shell and an end cover in sequence. A groove is formed in the side, close to the inner core column, of the shell, and a permanent magnet is embedded in the groove. An acceleration sensor is arranged on the side face of the end cover and is used for detecting the acceleration of the vibration isolator, and then an acceleration signal is converted to the size of current flowing into the electromagnetic coil through an external signal processing module to effectively suppress vibration.The multi-free magneto-rheological grease vibration isolator controls the modulus of the magneto-rheological greases by means of the joint action of the permanent magnets and the electromagnetic coil,then controls the stiffness of a damper, and finally achieves a vibration reduction function, a good vibration isolation effect and a wide application range.

Description

technical field [0001] The invention belongs to the field of precision vibration control equipment, and in particular relates to a multi-free magneto-rheological grease vibration isolator. Background technique [0002] Seat suspensions are commonly used in commercial vehicles for industrial, agricultural, and other transportation purposes to provide driver ride comfort, reduce driver fatigue due to prolonged driving, and improve driver safety and health. The study of seat suspension optimization and control has been an active topic for decades. [0003] So far, there are mainly three types of seat suspensions, namely passive seat suspensions, semi-active seat suspensions and active seat suspensions. The research of passive seat suspension mainly focuses on the parameter optimization of spring stiffness and damping coefficient. Generally speaking, a small spring rate can provide good ride comfort. At present, the commonly used vibration isolation devices for car seats are ...

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