CN2330696Y

CN2330696Y - Stay-cable vibration damper

Info

Publication number: CN2330696Y
Application number: CN 98232486
Authority: CN
Inventors: 黄连经; 顾金钩; 刘健新
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-02
Filing date: 1998-03-02
Publication date: 1999-07-28
Anticipated expiration: 2008-03-02

Abstract

The utility model relates to a dashpot, comprises a box body which is upwards opened. The utility model is characterized in that two plate-shaped vibration elements are vertically arranged on both sides of a vertical spacer plate in the box body, the inner part of a cavity in the box body is filled with high molecular polymer viscosity bodies, the upper part and periphery of the box body are provided with an outer shell, and the upper ends of the vibration elements are fixed on the top part in the outer shell. The utility model is suitable for the vibration deadening of drag ropes of cable stayed bridges and can also be used for controlling vibration caused by earthquake, etc. The utility model can suppress vibration on each direction and vibration with tiny amplitude of drag ropes and can be used matching drag ropes with various specifications, and the utility model has the advantages of simple structure, convenient installation, simple maintenance and management and long service life.

Description

The inhaul cable vibration damper

The utility model relates to a kind of damper, particularly a kind of sticky shearing type damper that is used to suppress the bridge cable vibration.

Drag-line is the important component of cable stayed bridge, and along with the increase of cable stayed bridge span and the application of high tensile steel wire, drag-line is more and more elongated, under kinetic factor effects such as wind and traffic load, drag-line very easily vibrates, and makes the passenger feel uneasy, produce fatigue in drag-line bearing, cause disconnected rope accident.For suppressing inhaul cable vibration, adopt measures such as stretch-draw second order rope, change drag-line cross sectional shape, installation oil damper usually.Wherein oil damper comprises filling in oily seal case, the case has piston with holes, piston rod to fixedly connected with drag-line.During inhaul cable vibration, repent the drive piston vibration by piston, the oil in the casing produces damping force by the Kong Congyi effluent on the piston to opposite side, stops piston, piston rod and inhaul cable vibration, reaches the damping purpose, but exists following deficiency:

1. oil damper need be used seal, and complex structure, and the easy aged deterioration of seal influence application life.

2. piston can only be a direction motion, so oil damper can only suppress the vibration of a direction of drag-line.

3. the oil damper utilization diameter that changes hole on the piston changes the size of damping force, and the oil damper that needs multiple different size cun can satisfy the drag-line damping needs of different size.

4. a small amount of oil plant is taken in the athletic meeting of piston rod out of, and the situation that produces the space in the casing often takes place, and makes oil damper inoperative to the microvibration of drag-line.

The purpose of this utility model provides a kind ofly not to be needed to seal, simple structure, can satisfy the damping needs of plurality of specifications drag-line, can suppress the vibration of drag-line all directions, can suppress the micro breadth oscillation of drag-line, sticky shearing type inhaul cable vibration damper easy for installation, long-lived yet.

For achieving the above object, the technical solution of the utility model is: a kind of inhaul cable vibration damper comprises the casing of a upper shed it is characterized in that vibrating member vertically places in the casing, filling high molecular polymer viscoid in the box cavity.

In the such scheme, vibrating member can be plate shape, strip or clavate, can be one, also can be several.The high molecular polymer viscoid of filling can be a polyvinyl isobutyl ether, claims polybutene again, and viscosity is big, difficult combustion, durable, Heat stability is good, viscosity changes less than 30% in-25 ℃～60 ℃ temperature range, though the shear strain decline that also can not produce viscosity repeatedly, long service life.

In the such scheme,, the outside that the shell of a under shed and casing are supporting, cover on casing can be arranged in order to keep the cleaning of viscoid; Fixing top in the enclosure, the upper end of vibrating member places the viscoid in the pincers body; One circle rubber is set around the outside of casing, foreign matter can't be entered in the casing.

Excessive for preventing vibrating member lateral displacement in casing, in casing, can vertically fix a dividing plate, cabinets cavity vertically is separated into several flute profiles, vibrating member is placed in one.

When using the utility model, the bottom of casing is fixed on bridge floor or the bridge, fixedlys connected with drag-line in the top of vibrating member or the top of shell.

Because vibrating member of the present utility model is immersed in the high molecular polymer viscoid, when inhaul cable vibration, when driving the vibrating member vibration, viscoid produces shear strain, absorbs the energy of vibration, produces damping force, stops the vibrating member vibration, reduces the vibration of drag-line.Because of vibrating member left and right sides all directions vibration up and down in viscoid, so it can suppress the vibration of drag-line all directions, comprises the vibration of small amplitude.The utility model does not need sealing, and simple structure is convenient to install, and maintenance management is simple, does not exist owing to machinery contacts or install error or the bad cooperation that produces, long service life.Drag-line for different size, the utility model adopts the contact area of consumption, change vibrating member and the viscoid of increase and decrease high molecular polymer viscoid, thereby change damping force and realize, make the utility model can with the supporting use of the drag-line of various different sizes, itself does not need a lot of specifications.Therefore, the utlity model has the vibration that can suppress the drag-line all directions and small amplitude vibration, can with the matching used outstanding advantage of the drag-line of all size, and simple in structure, easy for installation, maintenance management is simple, long service life.Be applicable to the damping of cable-stayed bridge cable, also can be used to suppress the vibration that causes by earthquake etc., in anti-falling stop beam, play cushioning effect.

Below in conjunction with drawings and Examples the utility model is further described.

Figure one is the schematic perspective view of the utility model casing;

Figure two is schematic perspective views of the utility model shell;

Figure three is sectional drawings of the utility model master apparent direction;

Figure four is that figure three A are to view.

Casing 1 upper shed shown in the figure one, high 240mm, the bottom is the rectangle of 220mm * 90mm, vertically fix in the case one with pincers body 1 dividing plate 2 isometric, contour, thick 10mm casing 1 is divided into two parts, casing 1 outer upper fix one the circle rubber 3.

Shell 6 shown in the figure two is box-shapeds of under shed, high 256mm, and the top is the rectangle of 340mm * 260mm, the plate shape vibrating member 7 of two 236mm * 145mm * 10mm is fixed on shell 6 inner tops, and shell 6 inner chambers are divided into three parts.

Among figure three, the figure four, shell 6 covers on the outside of casing 1 from the top down, and two boards shape vibrating member 7 inserts in the both sides of casing 1 internal partition 2, the high molecular polymer viscoid 4-polyvinyl isobutyl ether that filling 150mm is high in the space, this viscoid is in the time of 25 ℃, and viscosity was 6000 handkerchief seconds.

All parts of present embodiment are the steel member, are suitable for long 100m, the damping of the suspension cable of diameter 90mm.

When the utility model was installed, the bottom of casing 1 was fixed on by screw 5 on the base of bridge floor, fixedlyed connected with drag-line with connector with screw 5 in the top of shell 6.When drag-line during to the vibration of any direction, the plate shape vibrating members 7 that drive in the shell 6 by connector produce displacements, and high molecular polymer viscoid 4-polyvinyl isobutyl ether produces damping force and stops its vibration, plays the damping effect.

Through test, the vibration of using the utility model drag-line to be harmful to.For amplitude is the small size vibration of 1.0mm, 2.0mm, and good damping damping effect is arranged, also still effective to the damping of the following microvibration of 0.5mm amplitude.

Claims

1. inhaul cable vibration damper comprises the casing (1) of a upper shed it is characterized in that vibrating member (7) vertically places in the casing (1), filling high molecular polymer viscoid (41) in the cavity in the casing (1).

2. a kind of inhaul cable vibration damper according to claim 1 is characterized in that high molecular polymer viscoid (4) is a polyvinyl isobutyl ether.

3. a kind of inhaul cable vibration damper according to claim 1 and 2 is characterized in that vibrating member (7) is a two boards shape spare.

4. a kind of inhaul cable vibration damper according to claim 1 and 2, the outside that the shell (6) that it is characterized in that under shed is supporting with casing (1), cover on casing (1), the upper end of vibrating member (7) is fixed on the top in the shell (6), is fixed with a circle rubber (3) around the outside of casing (1).

5. a kind of inhaul cable vibration damper according to claim 4 is characterized in that vibrating member (7) is a two boards shape spare; Vertically fixedly install dividing plate (2) in the casing (1), two boards shape vibrating member (7) places the both sides of dividing plate (2).