CN209760484U

CN209760484U - Self-resetting corrugated variable-friction damper

Info

Publication number: CN209760484U
Application number: CN201920255824.1U
Authority: CN
Inventors: 李培振; 徐震; 刘强
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2019-12-10
Anticipated expiration: 2029-02-28

Abstract

The utility model discloses a become friction damper from restoring to throne ripple mainly includes inner tube, outer tube, friction pack, coil spring, belleville spring and relevant subassembly. The inner pipe is a solid steel round pipe, and the pipe diameter of the middle part is increased. The outer pipe is formed by combining two semicircular pipes with flat plate joints, and bolt holes are formed in the flat plates. The middle parts of the inner pipe and the outer pipe are corrugated sections matched with each other, and friction materials are adhered to the corrugated sections of the inner pipe and the outer pipe or friction surfaces are machined to jointly form a friction assembly. The helical spring is axially compressed to provide self-resetting capability. And a disc spring is added on the high-strength bolt, so that the self-resetting capability is radially provided. The damper has the characteristic of variable friction, the friction force is small under medium and small earthquakes, the displacement stroke is large, the friction force is increased rapidly under large earthquakes, the displacement stroke is reduced, and the energy consumption capacity under different earthquake conditions is ensured. Compared with the dampers of the same type, the damper has larger ultimate bearing capacity, good durability and wide application range.

Description

Self-resetting corrugated variable-friction damper

Technical Field

The utility model belongs to civil structure (including the structure of swaing, from reset structure and high-rise structure etc.) damping control field relates to a from reset ripple variable friction attenuator.

Background

The conventional damping control method mainly comprises passive control, active control, semi-active control and the like, wherein the passive control has the most extensive application due to simple structure, low manufacturing and maintenance cost. Common passive control devices include friction dampers, metal dampers, viscous dampers, viscoelastic dampers, and the like. However, the viscous damper has the problem of oil leakage in engineering, and the viscoelastic damper has poor anti-fatigue capability and poor durability under the earthquake action.

According to the 'toughness urban and rural' requirement put forward by China, the recoverable functional structure is a great trend. At present, a recoverable functional structure mainly uses prestressed steel bars or shape memory alloys to provide self-resetting capability, the prestressed steel bars have the problem of insufficient ultimate elastic deformation capability, and the performance of the shape memory alloys is greatly influenced by temperature.

Disclosure of Invention

in order to overcome the defects of the prior art, the utility model provides a self-resetting corrugated variable friction damper which has a double self-resetting mechanism, can realize nondestructive restoration under medium and small earthquakes and has good self-resetting capability under large earthquakes; meanwhile, the damper has the characteristic of variable friction, the friction force is small under medium and small earthquakes, the displacement stroke is large, the friction force is sharply increased under large earthquakes, the displacement stroke is reduced, and the energy consumption capacity under different earthquake conditions is ensured; the displacement of the swing structure is large under the action of an earthquake, the damper bears large load, the bearing capacity of 100 tons at most can be realized by the damper, the durability is good, and the application range is wide.

In order to realize the above function, the utility model adopts the following technical scheme.

A self-resetting corrugated variable-friction damper comprises an inner pipe, an outer pipe, a friction assembly, a spiral spring, a first flange baffle, a circular ring joint, an end cover plate, a second flange baffle, a high-strength bolt and a disc spring. Wherein, the inner tube is a solid steel round tube, and the tube diameter of the middle part is increased. The outer pipe is formed by combining two semicircular pipes with flat plate joints, and bolt holes are formed in the flat plates. The middle parts of the inner pipe and the outer pipe are corrugated sections which are matched with each other, the corrugated sections are designed into friction surfaces, and the friction surfaces outside the inner pipe, the friction surfaces inside the outer pipe and friction materials or processing friction surfaces stuck between the inner pipe and the outer pipe form a friction assembly together. Two ends of the inner pipe are respectively sleeved with a spiral spring, one end of each spiral spring is in contact with the inner pipe, and the other end of each spiral spring is in contact with the flange baffle. The circular ring joint comprises a circular ring part and a connecting part, wherein the circular ring part is provided with a connecting hole, and the connecting part is connected with one end of the inner pipe through threads. The first flange baffle consists of two semicircular flanges, is connected with the circular part of the outer pipe through bolts, has an inner diameter slightly larger than the outer diameter of the inner pipe, and has an outer diameter consistent with the outer diameter of the outer pipe, and is used for preventing the spiral spring from moving. The second flange baffle is consistent with the first flange baffle in principle, and the plate thickness is increased, so that a displacement space is provided for the inner pipe. The end cover plate is two semicircles, respectively with two flange joint of second flange baffle, two semicircle center departments respectively connect a joint, two connect and do not connect, allow to produce radial displacement. The high-strength bolts are uniformly arranged along the axial direction of the outer pipe, so that pre-pressure exists between the upper half circle and the lower half circle, and the disc springs are added on the high-strength bolts, so that the upper half pipe and the lower half pipe can move relatively when the outer pipe is stressed in the radial direction.

The central axis of the inner pipe is superposed with the central axis of the outer pipe, and is superposed with the central axes of the spiral spring and the end cover plate.

the second flange baffle is thickened according to the possible displacement of the inner pipe, and a sliding space is provided for the inner pipe.

The friction component is composed of an inner pipe outer friction surface, an outer pipe inner friction surface and a friction material or processed friction surface between the inner pipe and the outer pipe, and the friction material or processed friction surface is in an annular corrugated shape. The corrugated friction surface is divided into a plane and a slope, the plane friction force is controlled by a pre-tightening force, and the outer pipe does not displace in the radial direction during plane friction; the slope friction force is controlled by the earthquake force, and the two semicircles of the outer pipe are radially displaced during the slope friction.

The initial friction force can be changed by adjusting the pretightening force of the high-strength bolt.

The disk spring is in a compressed state under the pretightening force and still has a certain amount of compression, and can provide resilience force after the external force disappears.

the spiral spring is always in a compressed state, and the pre-pressures of the spiral springs on the two sides of the inner pipe are the same, so that the complete self-resetting is realized.

The utility model adopts a double self-resetting mechanism, both ends of the inner tube are provided with the spiral springs, the outer extending flat plate joint of the outer tube is provided with the plurality of disc springs, the spiral springs are pressed along the axial direction of the inner tube and provide self-resetting force along the axial direction, and the disc springs are pressed along the radial direction of the inner tube and provide self-resetting force along the radial direction; the rigidity of the spiral spring can be designed according to the initial friction force, and the maximum deformation of the disc spring can be designed according to the maximum displacement stroke.

Compared with the prior art, the utility model discloses there is following advantage:

(1) The utility model discloses a metal friction consumes energy, and this kind of power consumption form receives environmental impact little, and the stable performance can realize becoming frictional force according to the earthquake situation, and the little displacement of frictional force is big under the little shake, and the big displacement of frictional force is little under the big shake, has carried out the simultaneous control displacement of abundant power consumption.

(2) the utility model discloses a dual from reset mechanism, coil spring pressurized provides the power of resetting oneself during plane friction, and coil spring and belleville spring pressurized simultaneously provide the power of resetting oneself during domatic friction. The nondestructive recovery under medium and small earthquakes is ensured, and the recovery capability under large earthquakes is still good. Compare from reset material SMA silk and prestressing steel, the utility model discloses a spring wide application in the engineering, the cost is low, the stable performance, and the popularization nature is good.

(3) The attenuator limit bearing capacity that has the restorable function at present is less, the utility model discloses the material mainly is steel, can realize great bearing capacity, and not to destruction under big shake more is applicable to the structure of the little rigidity of big displacement such as the structure of swaing.

Drawings

Fig. 1 is a structural diagram of the self-resetting corrugated friction-varying damper of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

fig. 3 is a sectional view taken along line B-B of fig. 1.

Reference numerals: 1 is the inner tube, 2 is the outer tube, 3 is friction pack, 4 is coil spring, 5 is first flange baffle, 6 is the ring joint, 7 is the end cover board, 8 is the second flange baffle, 9 is high strength bolt, 10 is belleville spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, the utility model provides a self-resetting corrugated variable friction damper, which consumes energy by means of metal friction, has better durability, allows larger displacement deformation, and can bear larger limit load; the spring with stable resilience is adopted, the influence of the environment is small, and self-resetting can be well realized.

The structure of the self-resetting corrugated friction-changing damper of the utility model is shown in figure 1, and figures 2 and 3 are respectively a section A-A and a section B-B in figure 1. The utility model discloses mainly include inner tube 1, outer tube 2, friction pack 3, coil spring 4, first flange baffle 5, ring joint 6, end cover board 7, second flange baffle 8, high strength bolt 9, belleville spring 10.

The inner pipe 1 is a steel solid round pipe, the radiuses of two ends of the inner pipe are the same, and the pipe diameter of the middle part of the inner pipe is increased; the inner tube 1 is arranged in the outer tube 2 in a penetrating way; the middle parts of the inner pipe and the outer pipe are corrugated sections which are matched with each other along the axial direction of the inner pipe and the outer pipe, the opposite surfaces of the corrugated sections of the inner pipe and the outer pipe are friction surfaces, and the corrugated sections and the friction surfaces of the inner pipe and the outer pipe jointly form a friction assembly 3. While the radius of the inner tube 1 at both end sides of the middle portion thereof is increased by 20mm as one end stop of the coil spring 4.

The utility model discloses in, the friction surface can adopt and paste friction material, or carry out different roughness to the ripple section that interior outer tube is relative in the friction pack 3 and handle and constitute the friction surface. Furthermore, the ripple section is divided into annular plane and annular domatic including the alternative setting, and the interior outer tube is in the contact of annular plane section, and the plane section allows has 10 millimeters displacements, and domatic displacement is controlled by the earthquake power, and when the earthquake power was greater than plane frictional force and helical spring 4 elasticity, domatic friction produced the displacement, and the biggest displacement can be designed according to the slope angle.

The inner diameters of two ends of the outer pipe 2 are larger than the outer diameters of two ends of the inner pipe 1, two ends of the outer pipe 2 are respectively provided with a flange baffle, one end of the flange baffle is a first flange baffle 5, the other end of the flange baffle is a second flange baffle 8, the flange baffles are positioned between the inner pipe and the outer pipe, the inner diameters of the flange baffles are slightly larger than the outer diameter of the inner pipe, and the outer diameters of the flange baffles are the; meanwhile, two ends of the inner pipe 1 are respectively sleeved with a spiral spring 4, and two ends of each spiral spring 4 are limited by the end side of the middle part of the inner pipe 1 and a flange baffle respectively and are in a compressed state.

Specifically, outer tube 2 comprises two semicircle pipes, and semicircle pipe both sides all set up overhanging dull and stereotyped, and the trompil is gone up to overhanging dull and stereotyped for install high-strength bolt 9. The two semicircular outer pipes form a whole circle to be assembled with the inner pipe 1, the extending flat plates of the two semicircular pipes are in butt joint, and the high-strength bolt 9 penetrates through the extending flat plate circular hole to form the outer pipe 2 into a whole.

Further, 2 both ends of outer tube are arranged in to first flange baffle 5 and second flange baffle 8 branch, and the outside trompil in 2 both ends of outer tube simultaneously adopts the bolt to connect flange and 2 both ends sides of outer tube, and the flange baffle plays the effect of control coil spring 4 displacement.

The utility model discloses in, adopt high strength bolt 9 and belleville spring 10 to apply the pretightning force to the internal and external pipe, belleville spring 10 sets up on high strength bolt 9 tie rods, and radial displacement through 2 two parts of outer tube allows the interior outer tube to slide along domatic in the axial, along with the increase of belleville spring 10 displacement volume, domatic normal stress increases, reaches the effect of becoming friction.

Further, for the convenience of connecting with the external structure, one end of the inner tube 1 is provided with a circular joint 6, the other end of the inner tube is connected with the outer tube 2 by using an end cover plate 7, and the center of the end cover plate 7 is provided with a joint.

The utility model discloses there is dual from reset mechanism, and the precompression of both ends coil spring 4 is the same about inner tube 1, and each belleville spring 10 precompression is the same. When the tension-compression load is larger than the plane friction force of the inner pipe and the outer pipe and the pre-pressure of the spiral spring, the inner pipe and the outer pipe generate relative displacement; when the load is smaller than the initial friction force of the slope and the elastic force of the spiral spring, the relative displacement of the inner pipe and the outer pipe is limited on the plane part, is +/-10 millimeters, and only the spiral spring 4 provides restoring force; when the load is larger than the initial friction force of the slope and the elastic force of the spiral spring, the two parts of the outer pipe 2 generate radial relative displacement, the inner pipe and the outer pipe continue to generate displacement along the slope, and the spiral spring 4 and the disc spring 10 jointly provide restoring force; in the above tension and compression process, only one of the coil springs 4 provides a restoring force, the other one does not, and the disc springs 10 all provide a restoring force.

The utility model provides a become friction damper from restoring to throne ripple's preparation step as follows:

1. Designing the length of a plane friction section of the inner pipe and the outer pipe, the slope angle of a slope friction section and the thickness of a second flange baffle according to allowable displacement; designing the radiuses of the inner pipe and the outer pipe according to the bearing capacity requirement; designing a friction material according to energy consumption requirements to determine a friction coefficient; and designing the rigidity and the pre-pressure of the two springs according to the three points.

2. The installation sequence is as follows: placing the inner pipe into the outer pipe, and screwing the high-strength bolt according to the design pre-pressure; putting a spiral spring on the inner pipe, and connecting the two flange baffles to the outer pipe; and connecting a end cover plate on the second flange baffle plate to finish the installation.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention in any way. Any changes or modifications of the above-described embodiments, which may be made by those skilled in the art based on the above-described disclosure, should be considered as equivalent effective embodiments, and all fall within the scope of the protection of the present invention.

Claims

1. A self-resetting corrugated variable friction damper is characterized in that: comprises an inner pipe (1), an outer pipe (2), a friction component (3), a spiral spring (4), a flange baffle, a high-strength bolt (9) and a disc spring (10);

The outer pipe (2) comprises two semicircular pipes with outward extending flat plates, the two semicircular pipes are butted at the outward extending flat plates and connected through a high-strength bolt (9) and apply prestress, meanwhile, a disc spring (10) with pretightening force is sleeved on the high-strength bolt (9), and the disc spring (10) is positioned between a bolt head of the high-strength bolt (9) and the outward extending flat plates;

The inner pipe (1) is a solid round pipe, the pipe diameters of two ends of the inner pipe are the same, and the pipe diameter of the middle part of the inner pipe is increased; the inner pipe (1) is arranged in the outer pipe (2) in a penetrating way; the middle parts of the inner pipe and the outer pipe are corrugated sections which are matched with each other along the axial direction of the inner pipe and the outer pipe, meanwhile, the opposite surfaces of the inner pipe and the outer pipe on the corrugated sections are friction surfaces, and the friction surfaces and the corrugated sections of the inner pipe and the outer pipe form a friction assembly (3) together;

the pipe diameters of two ends of the outer pipe (2) are larger than those of two ends of the inner pipe (1), two ends of the outer pipe (2) are respectively provided with a flange baffle, the inner diameter of the flange baffle is slightly larger than the outer diameter of the inner pipe, and the outer diameter of the flange baffle is the same as the outer diameter of the outer pipe; meanwhile, two ends of the inner pipe (1) are respectively sleeved with a spiral spring (4), and two ends of each spiral spring (4) are limited by the end side of the middle part of the inner pipe (1) and the flange baffle respectively and are in a compressed state.

2. The self-resetting corrugated variable friction damper according to claim 1, wherein: the corrugated section comprises annular planes and annular slopes which are alternately arranged;

And the corrugated sections of the inner pipe and the outer pipe are contacted at the annular plane section, and a gap is reserved at the annular slope section.

3. The self-resetting corrugated variable friction damper according to claim 2, wherein: the friction stroke of the annular plane is +/-10 millimeters, and the friction slope angle of the annular slope surface can be adjusted.

4. The self-resetting corrugated variable friction damper according to claim 1, wherein: the metal friction material is adhered to the corrugated sections of the inner pipe and the outer pipe to be used as friction surfaces, or the steel surfaces of the inner pipe and the outer pipe are processed to be the friction surfaces.

5. The self-resetting corrugated variable friction damper according to claim 1, wherein: and the high-strength bolts (9) are uniformly arranged along the axial direction of the outer pipe (2).

6. the self-resetting corrugated variable friction damper according to claim 1, wherein: the flange baffle is formed by butt joint of two semicircular flanges.

7. The self-resetting corrugated variable friction damper according to claim 6, wherein: the flange baffle of outer tube (2) one end is second flange baffle (8), and second flange baffle (8) increase along the axial thick increase of board of outer tube (2), provide the displacement space for inner tube (1).

8. The self-resetting corrugated variable friction damper according to claim 7, wherein: an end cover plate (7) is arranged on the outer side of the second flange baffle (8);

The end cover plate (7) comprises two semicircles, the two semicircles are respectively connected with two semicircular flanges of the second flange baffle (8), a joint is respectively arranged at the center of each of the two semicircles, the two joints are not connected, and radial displacement is allowed to be generated.

9. The self-resetting corrugated variable friction damper according to claim 1, wherein: the other end of the inner pipe (1) is provided with a circular joint (6);

The ring joint (6) comprises a ring part and a connecting part which are connected with each other; the connecting part is in threaded connection with the inner pipe (1); the circular ring part is provided with a connecting hole.

10. The self-resetting corrugated variable friction damper according to claim 1, wherein: the central axis of the inner tube (1) coincides with the central axis of the outer tube (2).