CN201991101U - Torsional lead extruding damper - Google Patents

Abstract

The utility model relates to a torsional lead extruding damper. The torsional lead extruding damper comprises a closed cavity filled with lead and a central rotating shaft, wherein the central rotating shaft penetrates through the closed cavity; and a flange is arranged on the central rotating shaft. In the light of the characteristic that the conventional lead extruding damper consumes energy through relative translational displacement, the utility model provides the novel torsional lead extruding damper which consumes the energy through relative angular displacement; the torsional lead extruding damper is simple in structure, convenient in process, stable in performance and desirable in expandability, can extrude the lead to consume the energy by directly using the relative angular displacement to rotate the central rotating shaft and can also extrude the lead to consume the energy by transforming the relative translational displacement to the rotation of the central rotating shaft through a rotating gear and a translational rack.

Description

The twist mode lead extrusion damper

Technical field

The utility model is a kind of lead extrusion damper that reverses, and can effectively the translation displacement be converted to corner displacement, and the structural system of extruding power consumption material, and then consumption thus energy plays the effect of energy-dissipating and shock-absorbing (shaking) to structure.

Background technology

Energy-dissipating and shock-absorbing (shaking) technology is a kind of effective structure control technology, and it reduces the dynamic response of structure under earthquake, strong wind or other dynamic load function by in the appropriate location of structure energy-dissipating and shock-absorbing (shaking) device being installed with this.The general load-displacement curve of metal mold damper as shown in Figure 1, consumed energy as the formula (1), load-displacement curve lower envelope area (E _x) being consumed energy, its dimension is " power * displacement ".Equally, corner displacement is appropriate to the occasion can to consume energy when taking place, its corner-M curve as shown in Figure 2, its envelope area is consumed energy, as the formula (2), dimension is " power * displacement * radian ", also is the energy dimension.The utility model utilizes the suitable damper form of (2) formula structure just.

$E_x={\∫}_0^{x}F\left(x\right)\mathrm{dx}---\left(1\right)$

$E_{\mathrm{\θ}}={\∫}_0^{\mathrm{\θ}}M\left(\mathrm{\θ}\right)\mathrm{d\θ}---\left(2\right)$

Traditional lead damper comprises lead extrusion damper, lead shear damper, plumbous node damper, column type lead damper, Focardi type lead loss energy device, special-shaped lead damper etc.Fig. 3 and Fig. 4 are respectively lead extrusion damper and shearing damp device; The former relies on relative motion plumbous in central axis and the tube chamber, and lead is extruded the plastic strain consumed energy takes place; It is plumbous that the latter relies on shear rod termination shear plate to shear, the plumbous shear strain consumed energy that takes place.In the last few years, some novel lead dampers appearred successively, as bright rotary type lead shear damper and the board-like shearing type lead damper that waits exploitation of the Yan Wei of Beijing University of Technology; Rotary type shearing damp device is mainly used in bean column node, and this damper will be had an effect when bean column node deforms in the earthquake; The Zhou Yun of Guangzhou University etc. has developed plumbous damping tube damper;

Both there are some researches show that lead damper had following characteristics: (1) can obtain good energy dissipation capacity under small deformation; (2) except that the column type damper, other damper hysteretic loop curves have typically " Coulomb friction " characteristic, and mechanical model is simple; (3) load frequency and cycle-index are less to the service behaviour influence, have good stable and durability; (4) simple structure, easily manufactured.

The general of tradition lead damper all is to utilize the variation of relative translation displacement to make lead that plastic strain take place, with this consumed energy; Rarely has the situation of utilizing the variation that relatively rotates displacement to make that plumbous generation plastic strain is consumed energy.Reverse lead extrusion damper and compare with traditional lead extrusion damper, the plane simplified model of both elastic stages as shown in Figure 5 and Figure 6.Its power consumption essence is respectively suc as formula shown in (3) and (4).As seen, both power consumptions essence is different.

dE ₁＝(Q ₁+q ₁L)dx(3)

dE ₂＝(Q ₂+g ₂L/3)Ldθ(4)

In the formula: Q ₁, q ₁Be respectively traditional lead extrusion damper compressive plane pressure and end shearing force; Q ₂, q ₂Be respectively and reverse lead extrusion damper compressive plane pressure and end shearing force.

The utility model according to the characteristics of existing lead damper, is constructed the novel lead extrusion damper that reverses as setting out, to satisfy different power consumption needs.The utility model proposes a kind of lead extrusion damper that reverses extruding lead loss energy based on central axis, can be used for reversing (as the relative rotation between beam column, revolving door damping brake) in the energy-dissipation structure system, or the energy consume mechanism of the relative translation displacement of routine is converted to the power consumption pattern of relative rotation displacement by relevant transformational structure (as gear, inclined-plane etc.).In addition, the stroke of tradition lead extrusion damper and lead shear damper is subjected to the stability limit of outer steel pipe length and central axis (shear rod) itself, the utility model proposes utilize transmitting gear peace carry-over bar to change after, the translation displacement amplitude can change in a big way and translation tooth bar length is not subjected to the influence of structural stability relatively.

Summary of the invention

Technical problem

The utility model provides a kind of simple structure, easy to process, stable performance, twist mode lead extrusion damper that energy dissipation capacity is strong.

Technical scheme

A kind of twist mode lead extrusion damper described in the utility model comprises that inner filling has plumbous closed cavity and central rotating shaft, and described central rotating shaft passes closed cavity, the flange that is provided with on central rotating shaft.

Beneficial effect

The utility model provides the twist mode lead extrusion damper of a kind of simple structure, easy to process, stable performance: utilize be embedded in plumbous in the rotation extruding of central rotating shaft upper flange plumbous, plumbous the plastic deformation energy dissipation takes place.For directly applying to the system of utilizing relative rotation displacement power consumption between member; Also can the relative translation displacement between member be converted to the power consumption of twist mode lead damper by the method for transmitting gear peace carry-over bar is set.

Twist mode lead extrusion damper simple structure, energy dissipation capacity is strong, and is not subjected to work sclerosis or tired influence, has good stable and durability.Can be widely used in vibration damping (shake) power consumption of engineering structures.

Reversing lead extrusion damper with single shaft is example, analyzes the energy dissipation behavior of this damper based on the Abaqus platform.Take following supposition in the FEM (finite element) model: (1) only considers flange and plumbous contacting, and does not consider frictional influence, promptly rotates moment of flexure and only comes from the extruding of flange to lead; (2) suppose that the contact stress that acts on the flange does not change along the central rotating shaft direction; (3) not distortion of the flange in supposition closed cavity and the rotating shaft is considered as rigid body; (4) Qian material behavior is taked this structure of ideal elastic-plastic.According to the supposition of (2), adopt the plane strain pattern, calculate the central rotating shaft moment of flexure under this pattern after, multiply by the length of flange, the rotation moment of flexure that promptly can be considered this damping estimates, as the formula (5).

$M=\stackrel{\‾}{m}L---\left(5\right)$

In the formula:

-according to the rotation moment of flexure of plane strain mode computation; The rotation moment of flexure of M-damper is estimated; The L-flange is along the length of center veer.

Suppose that flange is 120mm, highly is to set up FEM (finite element) model as shown in Figure 7 by 55mm along the length of central rotating shaft direction, unit and node number are respectively 10929 and 10654.Adopt 4 nodal plane strain unit CPE4R simulation plumbous; Planar line rigid unit R2D2 simulates flange; Between lead and flange hard the contact being set is the not penetrable flange of lead; The translation DOF of node and flange section central point around constraint is plumbous.Because central rotating shaft is in rotary course, plumbous distortion is bigger, for saving computing time and being convenient to the model convergence, adopt the Explicit solver to analyze in the literary composition, the unit in the other certain circumference range of selected flange is the gross distortion of ALE adaptive mesh with adaptation unit.Consider material and geometrical non-linearity in the calculating simultaneously.The flange central point applies the outer corner time-histories of face as shown in Figure 8.

Under single shaft and the twin shaft situation, the corner-M curve of each central rotating shaft such as Fig. 9 and (wherein UFL and UFR are respectively the rotation moment of flexure that is packaged in left and right sides central rotating shaft in the closed cavity) shown in Figure 10.As seen from Figure 9, (1) corner-M curve is near rectangle, and is comparatively full; (2) initial stiffness of Zhuan Donging is bigger, in case after the side lead of flange one reached yield stress, the rotating shaft moment of flexure changed less substantially; When (3) central rotating shaft changes rotation direction, rotate moment of flexure and occur jumping.Owing to be the plane strain model, so the moment of flexure of exporting is the moment of flexure of per unit length, Fig. 9 (left side) as seen, the about 90N*m/mm of moment of flexure maximum value.This moment of flexure is still needed and be multiply by the length L=120mm of flange along the central rotating shaft direction, so the about 10800N*m of output moment of flexure peak value, the radian that multiply by rotation again is the energy of consumption.Suppose that reversing the lead extrusion damper end comes out with the gear transmission of radius 80mm, central axis rotates 1rad, and then power consumption is 10800N*m, supposes conventional lead extrusion damper peak value power output 135kN, the about 80mm of then corresponding translation displacement.

Single shaft reverses in the lead extrusion damper plane strain model, and when central rotating shaft went to certain position, plumbous Mises stress and equivalent plastic strain distributed respectively as Figure 11 and shown in Figure 12.As seen, plastic strain distributes and mainly concentrates in the rotational circle scope of flange, and in the rotation process, near Mises the stress plumbous central rotating shaft has substantially all reached yield strength.

Revise flange section height h to 29mm, 78mm and 100mm, Modeling Calculation goes out central rotating shaft rotation moment of flexure peak value respectively

Example institute is an example to parameter, through match, rotates the moment of flexure peak value

With the relational expression according to a preliminary estimate of flange height h as the formula (7) (in the formula,

Be respectively N*m/mm and mm with the unit of h), its result is as shown in figure 13.

$\stackrel{\‾}{m}={\mathrm{ah}}^2+\mathrm{bh}+c---\left(6\right)$

In the formula,

-according to the rotation moment of flexure of plane strain mode computation; The h-flange height; A, b, c-undetermined parameter.

$\stackrel{\‾}{m}=0.03111h^2-0.1579h+1.197---\left(7\right)$

Description of drawings

Further the utility model is described below in conjunction with drawings and embodiments.

Fig. 1 displacement-line of load.

Fig. 2 corner-M curve.

Fig. 3 tradition lead extrusion damper.

Fig. 4 tradition lead shear damper.

Fig. 5 tradition lead extrusion damper is simplified mechanical model.

Fig. 6 reverses lead extrusion damper and simplifies mechanical model.

Finite element grid under Fig. 7 lead extrusion damper plane mode.

The corner time-histories of Fig. 8 central rotating shaft.

Corner-the M curve of Fig. 9 central rotating shaft.

Corner-the M curve of the two central rotating shafts of Figure 10.

The Mises stress distribution of lead in Figure 11 central axis rotation process.

Equivalent plastic strain plumbous in Figure 12 central axis rotation process distributes.

Figure 13 flange height rotates the influence of moment of flexure to central axis.

Figure 14 is for reversing extruding lead damper 3-D view.

Figure 15 reverses extruding lead damper elevation.

Figure 16 is an A-A section among Fig. 2.

Figure 17 is the central rotating shaft schematic three dimensional views.

Figure 18 double flange central rotating shaft schematic three dimensional views.

Figure 19 twin shaft reverses the extruding lead damper.

Have among the above figure: closed cavity 1, lead 2, central rotating shaft 3, flange 4, transmitting gear 5, translation tooth bar 6.

The specific embodiment

The twist mode lead extrusion damper comprises closed cavity 1, central rotating shaft 3, lead 2, transmitting gear 5, translation tooth bar 6.Central rotating shaft 3 passes closed cavity 1 inside, and the flange on the central rotating shaft 34 places closed cavity 1 middle part, by axial limiting being set with the axial relative motion of control centre's rotating shaft 3 with closed cavity 1; Central rotating shaft 3 ends and transmitting gear 5 concentric couplings and fixing; Translation tooth bar 6 mates as required with transmitting gear 5 and interfixes.

Above-mentioned closed cavity generally adopts the steel plate welding; Power consumption requires to be provided with transmitting gear radius, the number of teeth and translation tooth bar time number system according to practical structures; The quantity of central rotating shaft can be set to two central rotating shafts according to actual requirement in addition.Also can be by increasing the flange height and the flange width vertically at central rotating shaft middle part, obtaining bigger rotary resistance, and then improve the energy dissipation capacity of this damper.

When relative translation displacement takes place in the absolute construction that is connected to closed cavity peace carry-over bar, rotation by the rack drives transmitting gear, and then make central rotating shaft rotate, and the lead of filling in the central rotating shaft intermediate flange extrusion chamber, plumbous because of the plastic deformation energy dissipation is taken place.

When adopting bigger transmitting gear, tooth bar significantly translation only can cause the corner displacement that central rotating shaft is less, so big transmitting gear has the advantages that to reduce the central rotating shaft corner displacement.Otherwise bigger corner displacement then appears in central rotating shaft, so little transmitting gear has the advantages that to amplify the central rotating shaft corner displacement.The coupling of transmitting gear and translation tooth bar can be set the certain gear ratio rate to obtain suitable power consumption effect according to design feature.

Above situation is suitable for the power consumption that the twist mode lead extrusion damper is applied to the translation displacement; If directly be to rely on the corner displacement power consumption, then need not above-mentioned transmitting gear peace carry-over bar is set, closed cavity and central rotating shaft are individually fixed between the structure that needs power consumption and get final product.

For the situation of directly utilizing relative rotation displacement power consumption between member, closed cavity 1 and central rotating shaft 3 are fixed with the member that the relative rotation displacement takes place respectively; When between member the relative rotation displacement taking place, plumbous 2 consume energy in the flange 4 rotation extruding closed cavities 1 on the central rotating shaft 3.

For the situation of utilizing relative translation displacement power consumption between member, central rotating shaft 3 ends should be provided with transmitting gear 5, and coupling is fixing with one heart with it, translation tooth bar 6 and transmitting gear 5 couplings; Closed cavity 1 and translation tooth bar 6 are individually fixed on the member that relative translation displacement takes place; Relative translation displacement between member is converted to the rotation of central rotating shaft 3 by translation tooth bar 6 and transmitting gear 5, plumbous 2 consumes energy in the 4 rotation extruding closed cavities 1 of the flange on the central rotating shaft 3 thus.

Embodiment

A kind of twist mode lead extrusion damper comprises that inner filling has plumbous 2 closed cavity 1 and central rotating shaft 3, and described central rotating shaft 3 passes closed cavity 1, the flange 4 that is provided with on central rotating shaft 3.Be provided with transmitting gear 5 in central rotating shaft 3 ends that are positioned at closed cavity 1 outside, on transmitting gear 5, be engaged with translation tooth bar 6.

Flange (4) quantity is variable, and also or be mutually certain angle of cut, central rotating shaft 3 can be many, and with reference to Figure 11, Figure 12, the quantity of the flange 4 on every central rotating shaft 3 is 2, and central rotating shaft 3 is 2.

Claims (2)

1. a twist mode lead extrusion damper comprises that inner filling has the closed cavity (1) and the central rotating shaft (3) of lead (2), and described central rotating shaft (3) passes closed cavity (1), it is characterized in that, goes up the flange (4) that is provided with at central rotating shaft (3).

2. according to right 1 described twist mode lead extrusion damper, it is characterized in that, be provided with transmitting gear (5), on transmitting gear (5), be engaged with translation tooth bar (6) in central rotating shaft (3) end that is positioned at closed cavity (1) outside.

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