Pull rod type belleville spring damper with early-stage rigidity capable of being preset

Abstract

The invention discloses a pull rod type belleville spring damper with early-stage rigidity capable of being preset. The pull rod type belleville spring damper is characterized in that a back pressure device is further arranged in a guide sleeve and comprises two sets of pre-pressing pull rods and two floating pressing plates, one floating pressing plate is arranged between a movable pressing plate and a belleville spring set, and the other floating pressing plate is arranged between a second end cover and the belleville spring set; the two sets of pre-pressing pull rods are distributed in central holes of the belleville spring set respectively, one ends of one set of pre-pressing pull rods are fixed to the floating pressing plate adjacent to the movable pressing plate, and the other ends of one set of pre-pressing pull rods penetrate through the floating pressing plate adjacent to the second end cover and the second end cover and are fixed to a limiting element; one ends of the other set of pre-pressing pull rods are fixed to the floating pressing plate adjacent to the second end cover, and the other ends of the other set of pre-pressing pull rods penetrate through the floating pressing plate adjacent to the movable pressing plate and the movable pressing plate and are fixed to a limiting element.

Description

Technical field [0001] The invention relates to a shock-absorbing device, in particular to a damper adopting a disc spring group. Background technique [0002] A damper is a shock absorbing device that provides resistance to movement to consume movement energy. The use of dampers to absorb energy and shock is a traditional technology widely used in aerospace, aviation, military industry, guns, and automobiles. Since the 1970s, people have gradually applied the technology of using dampers to absorb energy and absorb shocks to structural projects such as buildings, bridges, and railways. Disc spring dampers are widely used in seismic structures of various buildings due to their high impact resistance, low cost and good shock absorption effect. [0003] For the design of seismic structures of buildings, especially high-rise buildings, people pursue a comprehensive seismic performance that combines "resistance" and "loss", that is, under the action of weak wind vibration and small ea...

AI Technical Summary

Problems solved by technology

[0006] 1. The load connecting rod is kept balanced under the joint action of two sets of disc springs. Although the pre-tightening force of the two sets of disc springs can be adjusted, no matter how it is adjusted, the force of the two sets of disc springs on the load connecting rod will The acting forces are a set of equal and opposite forces, and simply applying any external force on the load connecting rod will break this balance and deform the two sets of disc springs, so the damper described cannot preset the early stiffness ;

[0007] 2. The damping coefficient of the disc spring is changed by preloading two sets of disc springs. This change is very limited, which leads to a small adjustment range of the equivalent stiffness of the damper, which often cannot meet the frequency requirements of building isolation;

[0008] 3. In this invention, two sets of disc springs must be used together to provide damping when the damper is under compression or tension load. This not only causes a certain amount of waste, but also greatly increases the length of the damper, which is not suitable for some Use where the installation space is tight

It can be seen that although the stiffness of the spring in the patent application scheme can be changed, the effective working length of the spring is not only significantly shortened, but also can only be compressed for energy consumption and vibration reduction, and cannot be stretched for energy consumption and vibration reduction.

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