Dynamic vibration absorber for hoisting process

Abstract

The invention discloses a dynamic vibration absorber for hoisting process. The dynamic absorber comprises a casing and connectors which are arranged on the periphery of the casing. A mass block and supporting structures are arranged inside the casing; the mass block is slidably supported by the supporting structures. A plurality of vibration absorption damper sets are connected to the periphery of the mass block. Each vibration absorption damper set comprises a hydraulic damper and an air spring arranged side by side; one end of the hydraulic damper is hinged to the outer wall of the mass block while the other end of the hydraulic damper is hinged to the inner wall of the casing, and axes of hinges at two ends are both perpendicular to the supporting surface of the corresponding supporting structure; one end of the air spring is connected to the outer wall of the mass block while the other end of the air spring is connected to the inner wall of the casing; the vibration absorber damper further comprises a hydraulic damping regulator and an air spring regulator. Hinged connection among the hydraulic dampers, the mass block and the casing provides a guarantee to free movement of the mass block on the supporting structure so that multi-direction vibration absorption effect in the same plane is achieved. Besides, both damping factor and elasticity coefficient are adjustable so that the dynamic vibration absorber can be applied widely on conditions of different wind loads and different sections.

Description

technical field [0001] The invention relates to the technical field of hoisting technology of marine engineering equipment, in particular to a dynamic vibration absorbing device used in the hoisting process. Background technique [0002] Large-scale equipment used in offshore engineering, such as large ships, drilling platforms, etc., need to be hoisted by large cranes frequently for assembly or placement welding during the construction process. The improvement of hoisting work efficiency not only determines the efficiency of the entire construction process, but also reduces costs and improves resource utilization. However, the improvement of hoisting efficiency is often restricted in two situations: first, in strong winds, the sections are vibrated by wind loads and have to reduce the speed of the hoisting movement, even leading to inability to construct; The position is adjusted to meet the segment position accuracy, which is difficult due to the vibration of the segment ...

AI Technical Summary

Problems solved by technology

[0003] Existing hoisting vibration damping devices generally work with suspenders or steel wires, and play a role of buffering and damping at the connecting end, and have limited vibration absorption for large mass segments that are directly excited by wind loads and vibrate, especially for vibrations in the horizontal direction not absorbed effectively

At the same time, the existing hoisting vibration damping device has poor adjustability, and cannot effectively damp vibrations for different vibration situations of different hoisting segments

Images