Rubber damper capable of adjusting initial stiffness

Abstract

The invention relates to a rubber damper capable of adjusting the initial stiffness. The rubber damper is characterized in that a back pressure device is arranged in a guide sleeve; the back pressure device includes more than three pre-pressing steel wire ropes, steel wire rope turning members having the same number with the pre-pressing steel wire ropes, steel wire rope self-locking tensioning anchors having the same number with the pre-pressing steel wire ropes, and a floating back pressure steel plate; the pre-pressing steel wire ropes are distributed in a circular space in a broken line manner; one end of each pre-pressing steel wire rope is symmetrically fixed on the floating back pressure steel plate, around the axis of the guide sleeve; and the other end of each pre-pressing steel wire rope passes through a corresponding steel wire rope turning member, turns back, and then bypasses the floating back pressure steel plate from a fixing point, on the floating back pressure steel plate, of the pre-pressing steel wire ropes, and is anchored on a second end cover through the corresponding steel wire rope self-locking tensioning anchor. The pre-pressing steel wire ropes is tensioned to a tension force desired by the initial stiffness, and a rubber shock insulation pad is clamped between a driving member and the floating back pressure steel plate all the time.

Description

technical field [0001] The invention relates to a building anti-vibration (or vibration) device, in particular to a damping device containing a rubber shock-isolating pad. Background technique [0002] Rubber shock-isolating pad is a kind of shock-isolating device with rubber as the deformation element. Due to the advantages of low cost, strong bearing capacity and low natural vibration frequency, rubber shock-isolating pad is widely used in heavy-duty occasions such as buildings and bridges. [0003] The strong bearing capacity of the rubber shock-isolating pad is mainly reflected in the compressive capacity, while the tensile capacity is often poor. Under the action of high tensile load, the rubber shock-isolating pad is easy to be torn, precisely because of the weak tensile capacity. Defects lead to certain restrictions on the application of rubber shock-absorbing pads in the field of shock-isolation technology. [0004] The invention patent application with the publicat...

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Problems solved by technology

[0003] The strong bearing capacity of the rubber shock-isolating pad is mainly reflected in the compressive capacity, while the tensile capacity is often poor. Under the action of high tensile load, the rubber shock-isolating pad is easy to be torn, precisely because of the weak tensile capacity. Defects lead to certain restrictions on the application of rubber shock-isolating pads in the field of shock-isolation technology

[0004] The invention patent application with the publication number CN101769015A discloses a "Laminated Rubber Shock Isolation Bearing Tensile Mechanism", which includes an upper connecting seat, a lower connecting seat and a laminated rubber clamped between the upper and lower connecting seats. The shock isolation support, the upper connection seat is provided with an "L" shaped upper reaction force arm, the lower connection seat is provided with an inverted "L" shaped lower reaction force arm, and the "L" shaped upper reaction force arm Between the reaction force arm and the horizontal lateral side of the inverted "L"-shaped lower reaction force arm, there is a laminated rubber shock-isolation support clamped by the two in reverse; when the tensile structure is compressed, The pressure is borne by the shock-isolation support clamped between the upper and lower connecting seats; when the tensile structure is pulled, the tension is supported by the "L"-shaped upper reaction force arm and the inverted "L"-shaped lower reaction force arm. The force arm is converted into the pressure on the seismic isolation bearing clamped between the two directions; although this makes the structure have tensile capacity, it still has the following disadvantages: (1) the isolation bearings are divided by different isolation bearings. Bear bi-directional loads, so at least two laminated rubber seismic isolation bearings are required, which not only costs more, but also increases the volume of the seismic structure; (2) When a seismic isolation bearing is compressed, there must be a seismic isolation bearing The bearing is under tension, and the seismic isolation bearing under tension also has the risk of tearing; (3) It is difficult to ensure that the characteristics of the two isolation bearings are the same in technology, so the isolation effect is different in different directions of force

Since the deformation element of the rubber shock absorber is rubber, the above three means of changing the effective working length of the spring are obviously not suitable for the rubber shock absorber; Can only compress energy dissipation and vibration reduction, not stretch energy dissipation and vibration reduction

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