Composite damping single-piston rod viscous damper

Abstract

The invention relates to a vibration-proof building unit, in particular to a composite damping single-piston rod viscous damper. The damper is a single-piston rod viscous damper and is characterized in that: a piston rod (2) of the single-piston rod viscous damper passes through a left end cover (1) through a working cylinder (10) on the left of a piston (5); a cylindrical spiral spring (60 is arranged in the working cylinder (10) on the right of the piston (5); one end of the spring is fixed on a right end cover (7), while the other end is fixed to the end face of the piston (5); an outer cylinder barrel (4) is sleeved outside an inner cylinder barrel (3) of the working cylinder (10); the left end cover (1) and the right end cover (7) are respectively arranged at two ends of the outer cylinder barrel (4), so that a gap between the inner cylinder barrel (3) and the outer cylinder barrel (4) forms a compensation cylinder (11); one one-way valve (13) is arranged in the body of the left end cover (1); and another one one-way valve (12) is arranged in the body of the right end cover (7). The viscous damper can simultaneously provide viscous damping and elastic damping in the whole moving process of the piston.

Description

technical field [0001] The present invention relates to a vibration or vibration resistant building element, in particular to a motion damper using a liquid as the damping medium, in particular a viscous (also called viscous) damper with a single piston rod passing through one end of a cylinder. Background technique [0002] In terms of structure, the viscous damper is equivalent to a piston cylinder whose working medium is a viscous substance, and is widely used in machinery, construction and other fields. The control mechanism of the viscous damper is to use the working medium to convert part of the energy transferred from the structure into heat energy and dissipate it during the process of compression deformation or high-speed flow, so as to alleviate the impact of external loads, reduce structural vibration, and protect structural safety. the goal of. However, this viscous damper is a speed-dependent damper and has no damping effect on structural deformation caused by ...

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Problems solved by technology

However, the above-mentioned invention patent obviously has the following deficiencies: 1. The piston rods running through the two ends of the cylinder, that is, the structure of double piston rods, especially the disc spring group is arranged at one end of the conventional viscous damper, and the whole damper must be extended by at least two times the viscous damping stroke + the thickness of the disc spring group, and the length of the entire damper doubles with the increase of the damping stroke, which will not only make it impossible to install due to space constraints, but even 2. Since the normal working stroke of the damper is a viscous damping stroke, first, when the building structure is just subjected to external force or the external force increases slowly, it will cause the structure to shake or produce excessive The second is that when the external force is a periodic load, although the speed is fast (velocity index is equal to 0~0.3), there is still the defect of aggravating the deformation of the structure at the moment when the external force changes direction; 3. The disc spring Although the group is located in the above-mentioned damping cylinder, it will inevitably be in contact with humid air due to no sealing measures, and it will be corroded over time and will reduce or even lose its elasticity.

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