Multi-degree-of-freedom high-damping viscoelastic vibration-damping hemispherical anti-shock and vibration-damping device

Abstract

An impact-resisting damping device with multi-freedom-degree high-damping viscoelastic damping semi-spheres is characterized in that the damping device is a sealed hexahedron device combined by a damping base, two damping cavity lateral covers, a damping cavity front cover and a damping cavity upper cover. A mechanical structural component inner cavity is formed in the vibration damper. The damping semi-spheres are attached to the entire inner wall of the mechanical structural component inner cavity. A damping cavity for mounting damping parts is formed in vibration damper. The damping base comprises a front positioning seat, a damping cavity base plate and a damping cavity rear plate. Each semi-sphere is made of high-viscoelasticity, high-damping and multi-freedom-degree polyether urethane materials. By the damping device, normal operation of highly-sensitive equipment under vibration and impact can be guaranteed.

Description

technical field [0001] The invention relates to a vibration damping device, in particular to a multi-degree-of-freedom high-damping viscoelastic vibration-damping hemispherical shock-resistant and vibration-damping device. Background technique [0002] At present, viscoelastic damping materials and their products have been widely used in vibration reduction and noise control of instrumentation, navigation equipment and electronic systems on rockets, missiles, satellites, aircraft, ships and vehicles. The viscoelastic material shock absorber has both buffering and energy dissipation functions, high frequency vibration isolation efficiency, and relatively large damping can well suppress the resonance peak. In recent years, great progress has been made in the design of damping and vibration reduction structures and the application research of viscoelastic damping materials, and a large number of engineering application problems have been solved. [0003] At present, most domes...

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Problems solved by technology

The vibration isolation system effectively reduces the impact of the random vibration environment in the 20Hz to 2000Hz frequency band on the crystal oscillator, but the spring damping coefficient is too low, the ability to consume energy is limited, and it is not conducive to configuring the best damping ratio; the vibration isolation device There are negative factors brought by multiple degrees of freedom, which makes the vibration isolation device suffer from serious resonance in the process of random vibration; at the same time, springs with low stiffness coefficients are prone to tremors, making it difficult to build a stable mechanical structure ; The additional weight of the vibration damping device is large, and the spring installation is welded, which is difficult to operate; the vibration damping direction is single, and the degree of freedom is small

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