Stepped Shock 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 impact 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 cushioning. The advantage of rubber isolators is to isolate low-frequency vibrations, but the energy absorption effect is limited in the face of severe impacts, and the vibration isolators are prone to tearing failure when the force direction changes. However, when the impact strength is high, the limiter element of the limiter will cause the secondary impact problem, causing the local acceleration of the equipment to increase sharply, which will cause the equipment to be damaged. [0003] The existing hydraulic damper is directly connected between the machine foot and the base. When the equipment vibration frequency is high, due to the fast speed and small displac...

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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