Ultra-low frequency hydraulic vibration isolation device based on shape memory alloy spring

Abstract

The present invention discloses an ultralow-frequency hydraulic-pressure vibration isolation device based on shape memory alloy springs. The vibration isolation device is mainly composed of a fuel tank, a rubber holder, mobile side plates, a piston, a piston rod, an installation table board, a guide sleeve, common springs, the shape memory alloy springs, a seal ring and the like. According to the ultralow-frequency hydraulic-pressure vibration isolation device provided by the present invention, the shape memory alloy springs serve as elastic elements, and through pre-treatment of a shape memory alloy, the shape memory alloy springs can work within a hyperelastic working range. Within the hyperelastic working range, large deformations of the shape memory alloy springs only cause slight restoring forces, and thus the shape memory alloy springs can obtain an ultralow dynamic stiffness. With arrangement of a differential-type hydraulic device using the shape memory alloy springs as the elastic elements, ultralow-frequency vibrations can be effectively isolated.

Description

technical field [0001] The invention relates to an ultra-low frequency vibration isolation device, more precisely, relates to an ultra-low frequency hydraulic vibration isolation device combining the superelastic effect of a shape memory alloy spring and low frequency hydraulic vibration isolation technology. Background technique [0002] As one of the important components of equipment such as ships, vehicles and construction machinery, the vibration isolation device can effectively isolate the vibration generated by the engine on the mechanical equipment, and reduce the harmful effects of vibration and noise on the engine itself and surrounding instruments. [0003] At present, most vehicles and marine engines use rubber mounts or ordinary hydraulic mounts for vibration isolation. Rubber vibration isolators attenuate vibration through the internal friction between rubber molecules. Because of their simple structure, high reliability and easy maintenance, they are still wide...

AI Technical Summary

Problems solved by technology

As we all know, compared with high-frequency vibration noise, it is more difficult to deal with low-frequency or even ultra-low-frequency vibration noise, because it requires technically that the vibration isolation device itself must have a low-frequency or ultra-low-frequency natural frequency, and at the same time realize the vibration source. The effective support of the existing vibration isolation technology is difficult to achieve a balance between the two

[0005] Traditional rubber vibration isolation devices and hydraulic vibration isolation devices are difficult to meet the requirements of ultra-low frequency vibration isolation due to the relatively high stiffness of the elastic components and the corresponding high natural frequency.

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