Stepped impact resistant damper

Abstract

The invention discloses a stepped impact resistant damper. The stepped impact resistant damper comprises a shell and a piston, wherein the shell is filled with damping liquid; at least one pair of throttling orifices which penetrate along the thickness direction of the piston are formed in the piston, and check valves are respectively arranged in the throttling orifices; for each pair of the throttling orifices, the damping liquid flowing direction permitted by the check valve in one throttling orifice is opposite to that permitted by the check valve in the other throttling orifice; an elastic airbag is connected to the lower surface of the piston; holes which penetrate along the thickness direction of the elastic airbag are formed in positions, which correspond to the at least one pair of throttling orifices, of the elastic airbag. By adopting the damper, the energy absorption efficiency is high, and secondary impact can be avoided during large-load impact. The damper is filled with the damping liquid and air, energy is consumed by virtue of the flowing of viscous oil in a cylinder, even if the impact energy is large, metal collision cannot occur, and the excessive impact acceleration of equipment is prevented.

Description

technical field [0001] The invention relates to mechanical equipment, in particular to a stepped anti-shock damper. Background technique [0002] At present, marine vibration isolation and shock resistance mainly rely on the combination of rubber vibration isolators and stoppers to achieve vibration isolation and equipment buffering. The advantage of the rubber vibration isolator is to isolate low-frequency vibration, but the energy absorption effect is limited in the face of severe impact, and the tearing failure of the vibration isolator is prone to occur when the direction of the force is changed. However, when the impact intensity is high, the stopper component will cause a secondary impact problem, resulting in a sharp increase in the local acceleration of the equipment, which will cause equipment damage. [0003] Existing hydraulic dampers are attached directly between the machine feet and base. When the vibration frequency of the equipment is high, due to the fast s...

AI Technical Summary

Problems solved by technology

The advantage of the rubber vibration isolator is to isolate low-frequency vibration, but the energy absorption effect is limited in the face of severe impact, and the tearing failure of the vibration isolator is prone to occur when the force direction changes

However, when the impact intensity is high, the stopper element will cause a secondary impact problem, resulting in a sharp increase in the local acceleration of the equipment, which will cause equipment damage

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