Liquid mass double-tuned shock absorber and assembly method thereof

Abstract

The invention discloses a liquid mass double-tuned shock absorber, which comprises a base, a top cover, a rubber-metal composite part and a ball screw inerter component. The inerter component comprises a screw bolt, and one end of the screw bolt penetrates a center hole of the top cover to extend upwards while the other end is positioned in a step hole of the base. A ball screw portion of the screw bolt is provided with a screw nut through a ball, a rotating flywheel and a rolling bearing externally sleeve the screw nut, the inner periphery of the rolling bearing and a convex shoulder of the rotating flywheel are positioned through a convex shoulder of the screw nut, and the outer periphery of the rolling bearing is mounted in the step hole of the base. The ball screw inerter component isdesigned in the rubber-metal composite part to form a parallel support effect along with the same, the compact structure is realized, and the ball screw inerter component has an excellent performanceof low-frequency vibration absorption and overcomes the defect of the poor performance of a rubber shock absorber in low-frequency vibration absorption.

Description

technical field [0001] The invention relates to a liquid-mass double-tuned shock absorber and an assembly method thereof, in particular a liquid-mass double-tuned shock absorber with a ball screw type inerter assembly and an assembly method thereof, belonging to the technical field of vibration reduction. Background technique [0002] With the continuous construction of modern cities, buildings tend to be high-rise and super-high-rise development. In order to meet the needs of production and life, the span of bridges is also increasing, and civil engineering structures are increasingly developing towards high, large, light and soft. It is the extensive construction of suspension bridges, and the span records of bridges are constantly refreshed. Although these developments provide convenience for people's production and life, the structural vibration frequency of high-rise buildings and long-span bridges is low, and the damping is small. The structural response under external...

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Problems solved by technology

However, this tuned mass damper only uses the vibration inertial force of its own mass block to offset the exciting force. If it needs to offset a large exciting force, it needs its own mass block to have a large mass, which will not only increase the The manufacturing cost of the shock absorber will also add many difficulties to the installation and disassembly work on site; in addition, the shock absorber has a narrow vibration suppression frequency band and is highly sensitive to frequency tuning; at the same time, the shock absorber can only reduce The response of the structure in one direction, but in fact, structures such as long-span bridges may generate large vibrations both vertically and laterally at the same time. Therefore, it is not economical and cannot completely solve practical problems, so the engineering application value is limited to a certain extent.

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