Permanent magnet type magneto-rheological vibrating isolation support with adjustable rigidity and damping

Abstract

The invention relates to a permanent magnet type magneto-rheological vibrating isolation support with adjustable rigidity and damping, and belongs to the field of structural vibration control. The permanent magnet type magneto-rheological vibrating isolation support with adjustable rigidity and damping is composed of a magneto-rheological vibration isolator and a lifting platform in a series connection mode. The magneto-rheological vibration isolator comprises an upper cover plate, an inner sleeve, magneto-rheological elastomer, an upper permanent magnet, a lower permanent magnet, a gel bladder and magneto-rheological gel. The lifting platform comprises a handle, a moving plate, an upper fixed block, an upper guide rail set, a first sliding block set, a first X-shaped shear type mechanism, a lower fixed block, a fixed plate, a double-rotation-direction lead screw, a second sliding block set, a second X-shaped shear type mechanism, a bearing, a lower connecting pedestal, an upper connecting pedestal and a lower guide rail set. A rigidity adjusting unit is composed of the upper permanent magnet, the magneto-rheological elastomer and the lower permanent magnet, and a damping adjusting unit is composed of the upper permanent magnet, the magneto-rheological gel and the lower permanent magnet. The separation distance between the upper permanent magnet and the lower permanent magnet is changed through the lifting platform, so that a magnetic field with adjustable intensity is generated, and then continuous adjustment of rigidity and damping of the vibrating isolation support is achieved. The permanent magnet type magneto-rheological vibrating isolation support with adjustable rigidity and damping can meet the requirements of different vibrational excitation for the rigidity parameter and the damping parameter of the vibrating isolation support, is high in environmental adaptability, and has the advantages of being compact in structure and low in cost, and convenient to install, achieving continuous parameter adjustment, and being free of power supply of an external power source.

Description

technical field [0001] The invention relates to a permanent magnet magneto-rheological vibration isolation support with adjustable stiffness and damping, which belongs to the field of structural vibration control. Background technique [0002] The precision instruments and equipment in the spacecraft will be subjected to severe shocks during launch and landing, which may cause damage to the equipment; during orbital operation, they will be affected by slight low-frequency disturbances, which will affect the accuracy and reliability of the equipment. The vibration of the optical breadboard in the laboratory will affect the imaging effect of the photoelectric instrument, resulting in unstable measurement results or even measurement failure. The vibration of the exposure machine lens and the workpiece table limits the minimum lithography line width of the lithography machine, resulting in the inability to improve its resolution. With the advancement of science and technology, ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a vibration isolation support with compact structure, easy installation, and adjustable stiffness and damping without external power supply, so as to overcome the poor environmental adaptability of passive vibration isolation supports, difficulty in adjusting stiffness and damping parameters, semi-active And active vibration isolation bearing complex structure, high power consumption, inconvenient installation

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