Vibration isolator with large load and adjustable stiffness and damping

Abstract

The invention provides a vibration isolator with large load and adjustable stiffness and damping, which includes a vibration isolation plate, a load-bearing platform, a magneto-rheological damper, a diaphragm spring, and a supporting base; the load-bearing platform includes a load-bearing plate, a sleeve, An upper diaphragm spring seat and a lower diaphragm spring seat; the vibration isolation plate is arranged on the upper surface of the bearing plate; the diaphragm spring includes an upper diaphragm spring and a lower diaphragm spring, and the upper diaphragm spring and the lower diaphragm The leaf spring is overlaid on the sleeve, and the outer wall of the sleeve is fixedly provided with a spacer ring for installing the diaphragm spring. The inner edge of the upper diaphragm spring is fixedly arranged on the spacer ring. Diaphragm spring seat sliding fit, the inner edge of the lower diaphragm spring is fixedly connected with the spacer ring, and the outer edge of the lower diaphragm spring is sliding fit with the lower diaphragm spring seat; it can meet the requirements of large loads, has strong adaptability, and can The stiffness and damping of the vibration isolator can be adjusted, so that the frequency characteristics and energy dissipation characteristics of the vibration isolator can be effectively satisfied.

Description

technical field [0001] The invention relates to a vibration isolation device, in particular to a vibration isolator with large load and adjustable stiffness and damping. Background technique [0002] Vibration isolation technology has been widely used in various industries, such as aviation, vehicles, ships, precision machining, etc. The precision instruments and equipment in the spacecraft will be subject to severe impact during launch and landing, which may cause damage to the equipment; when the vehicle is driving on a bumpy road, the seat shakes violently, resulting in a poor experience for the passengers; the propulsion device of the ship brings Vibration noise caused by strong environmental vibration will become the source of underwater radiation noise; the vibration of the exposure machine lens and 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...

AI Technical Summary

Problems solved by technology

When the load mass is constant, the stiffness of the vibration isolation support determines its resonance frequency; the damping reflects the vibration energy dissipation capacity of the vibration isolation support; However, rubber will experience fatigue and aging during use and storage, and its performance will gradually decline or even fail as time goes by. Especially in the use of ship vibration isolators, rubber is exposed to high temperature and radiation Corrosion and aging are faster in environments such as sunlight and seawater

Existing metal vibration isolators can work in oily, high and low temperature harsh environments, are not easy to age, and have relatively stable performance, but are not capable of bearing large loads

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