An active vibration isolator based on the compound of magnetorheological cement and metal rubber

Abstract

The invention discloses a self-adaptive vibration isolation device taking magnetorheological cement gum as a working part and taking metal rubber as compensation. The self-adaptive vibration isolationdevice is composed of a compensation device, a damping buffering device, an electromagnetic generating device, an acceleration sensor and a vibration isolator control device. The acceleration sensoris used for collecting vibration information of an engine and transmitting collected signals to a controller, the controller processes the signals collected by the acceleration sensor to control the magnitude of circulation currents in an electromagnetic coil of the electromagnetic generating device, then the intensity of a magnetic field is changed, and finally the effects of changing the rigidity changes of the magnetorheological cement gum and achieving vibration isolation are achieved. According to the scheme, the problem that in an original vibration isolator, the high magnetic field intensity is difficult to obtain is solved, and the self-adaptive vibration isolation device has the advantages that the structure is simple, installation is convenient, the high interchangeability is achieved, and the working frequency bandwidth is wide.

Description

technical field [0001] The invention relates to the fields of vibration buffering, metal rubber, magnetorheological elastomer, etc., and is specifically an active vibration isolator based on the composite of magnetorheological clay and metal rubber, which is applied to engines, aviation and aerospace of various military and civilian vehicles. And active vibration isolation, hybrid vibration isolation and vibration and noise control of various marine engines. Background technique [0002] During the normal working process of the mechanical power system, it will be accompanied by intense and variable-frequency high-frequency excitation, which will be directly transmitted to the substrate to cause severe vibration and cause certain damage to its mechanical structure. The vibration generated by the vehicle engine will not only cause certain damage to the vehicle frame and the engine itself, but also seriously affect the comfort of passengers. Therefore, in order to reduce or ev...

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Problems solved by technology

[0004] In order to make up for and solve the problems of narrow working frequency band and poor vibration isolation effect of the existing passive vibration isolator, the active magnetorheological elastomer vibration isolator has small adjustable stiffness, low magnetic field utilization rate, and high power consumption of the vibration isolator. , the present invention proposes an active vibration isolator that uses magnetorheological cement as the working medium and is compounded with metal rubber to achieve low-frequency and high-frequency vibrations, and active vibration and noise control in which system parameters can be adaptively adjusted with time and excitation changes

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