High-sensitivity vibration isolation platform based on linkage type magnetorheological fluid dampers

Abstract

The invention relates to a high-sensitivity vibration isolation platform based on linkage type magnetorheological fluid dampers. The high-sensitivity vibration isolation platform comprises a fixed platform, a movable platform, the dampers, a linkage pipe, piston rods and a compensation air cylinder, the linkage pipe is fixed to the fixed platform, and is of a cross structure, the linkage pipe comprises a compensation air cylinder connector in the center and four damper connectors around the linkage pipe, the compensation air cylinder is communicated with the compensation air cylinder connector, the four dampers are communicated with the four damper connectors respectively, the lower ends of the piston rods are connected in the dampers, and the upper ends of the piston rods are in sliding connection with the movable platform. According to the vibration isolation platform, the problems generated when a traditional linear vibration isolation system isolates low-frequency or ultralow-frequency vibration are solved, and the defects that the vibration isolation platform is complex in structure and high in manufacturing cost, consumes energy and the like are overcome. The vibration isolation platform has the advantages that the structure is simple, damp stepless adjustment is achieved, the vibration isolation platform is suitable for wide frequency domain vibration isolation and can be widely applied to precision equipment with restrict requirements for vibration isolation, and the good engineering applicability is achieved.

Description

technical field [0001] The invention relates to a vibration isolation platform, in particular to a high-sensitivity vibration isolation platform based on a connected magnetorheological fluid damper, and belongs to the technical field of vibration reduction and vibration isolation in mechanical engineering. Background technique [0002] With the rapid development of engineering science and technology and the rapid improvement of people's material living standards, people have higher and higher requirements for vibration isolation technology of some equipment. In many cases, vibration is considered a negative factor. For example, vibration will affect the functions of precision instruments and equipment, reduce machining accuracy, aggravate fatigue and wear of components, and shorten the service life of its structures. Vibration may also cause large deformation and damage to the structure. Some bridges have collapsed due to vibration; flutter of aircraft wings and buffeting o...

AI Technical Summary

Problems solved by technology

However, traditional linear vibration isolators have gradually exposed some limitations. For example, the linear vibration isolation system can only be used when the external disturbance frequency is greater than the natural frequency of the vibration isolator. The vibration isolation effect can only be achieved when the frequency is doubled, and the vibration control effect is limited by the structure space and stability guarantee when dealing with local and low-frequency external disturbances

[0004] At present, the existing vibration isolation platform has a good vibration isolation effect on large displacement vibration. Its defect is that when it is adjusted to the equilibrium position, if the vibration isolation equipment generates a small vibration, such as 0.1mm-1mm vibration, it will not reach To the expected vibration isolation effect

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