CN205859040U - A kind of tuned mass damper - Google Patents

Abstract

The utility model discloses a tuned mass damper. A damper and a flywheel are arranged between an additional mass block and a main structure. A flywheel shaft passes through the flywheel. One end of the flywheel shaft is connected with the additional mass block, and the other end is connected with a ball wire. The connecting end of the ball screw and the flywheel shaft is provided with a sleeve, the ball screw is also provided with a ball nut, the ball nut is provided with a fixed sleeve, the fixed sleeve is connected with the main structure, and the connecting end of the flywheel shaft and the additional mass A flywheel fixing device is also provided, and the flywheel shaft is connected with the additional mass block through the flywheel fixing device. The tuning mass damper is equipped with a flywheel driven by a ball screw, and the relative displacement between the main structure and the additional mass block is used to realize the rotation of the ball screw, and the rotation of the ball screw is converted into the high-speed rotation of the flywheel. The moment of inertia generated by the flywheel is used to offset the mass of the additional mass block, so as to reduce the overall structural volume and mass of the tuned mass damper.

Description

A kind of tuned mass damper

Technical field

This utility model belongs to the vibration control field of building structure or plant equipment, more specifically to one tuning Mass damper.

Background technology

Tuned mass damper has obtained increasingly being widely applied as a kind of energy-eliminating shock-absorbing device in recent years, and it is good Effectiveness in vibration suppression have also been obtained substantial amounts of engineering verification.But common tuned mass damper is in order to obtain preferable damping effect Really, mass ratio sets relatively big, and this can dramatically increase construction weight, and normal condition wishes to reach the 3%～5% of original structure quality, These additional mass will dramatically increase the gravity laod of structure.

Existing Tuned mass damper system common are suspension type, slide rail type and spur roller gear formula.Suspension type quality Big mass, by arranging the versions such as truss at structure top end, is hung up with suspension cable, and installs by tuned damping system Damper system is so that dissipation energy.Owing to mass presses simple harmonic motion, its natural frequency of vibration is relevant to suspension cable length, as required to be System has longer natural vibration period, then require that suspension cable length is the biggest.This method is low for space availability ratio, and structure is multiple Miscellaneous, construction costs is high, installs inconvenience.If on the other hand suspended structure once lost efficacy, structure will be produced by the big mass fallen Raw destruction, causes potential safety hazard.Slide rail type tuned mass damper, by arranging sliding rail and spring system, makes mass exist According to the frequency movement set on sliding rail, and antivibrator is installed with dissipation capabilities.This technology friction system to sliding rail Number requires very strict, if the coefficient of friction of sliding rail is too big, will appear from the situation that mass cannot slide.And gear rolling Dynamic formula is briefly to utilize by gear driven big quality disk rotational, to reduce the effect of additional mass, same The gear coefficient of friction when engagement is required higher, and structure has frictional force greatly, the shortcoming that service life is short.

Utility model content

The purpose of this utility model is to provide a kind of tuned mass damper, this tuned mass damper is provided with by The flywheel that ball-screw drives, utilizes the relative displacement produced between main structure and additional mass to realize ball on ball-screw Nut moves along a straight line, and the straight-line displacement of ball nut is converted into the high-speed rotation of flywheel by ball-screw so that flywheel Produce rotary inertia with the quality of offsetting additional mass, play and reduce tuned mass damper overall structure volume and quality Purpose.

Technical solutions of the utility model one tuned mass damper, including the additional mass being connected with main structure, institute State and between additional mass and main structure, be provided with antivibrator and flywheel, through having flywheel shaft, described flywheel shaft on described flywheel One end is connected with additional mass, and the other end connects to be had ball-screw, described ball-screw to be connected end with flywheel shaft to be provided with set Cylinder, described flywheel shaft is connected end and is placed in sleeve with ball-screw, and ball-screw is additionally provided with ball nut, described ball spiral shell Being provided with fixed cover on mother, described fixed cover is connected with main structure, and described flywheel shaft is connected end with additional mass and is additionally provided with Flywheel fixing device, flywheel shaft is connected with additional mass by flywheel fixing device.

Preferably, described flywheel shaft and sleeve connection end are provided with external screw thread, are provided with female thread in described sleeve, described Female thread engages with external screw thread.

Preferably, described fixed cover connecting and has support seat, fixed cover is connected with main structure by supporting seat, described fixing Overlap hinged with support seat.

Preferably, described flywheel fixing device includes the firm banking affixed with additional mass, described firm banking with Flywheel shaft is hinged.

Preferably, described flywheel shaft being provided with bearing, described flywheel is fixed with flywheel shaft by bearing.

This utility model technology beneficial effect:

A kind of tuned mass damper of technical solutions of the utility model, additional mass with need to carry out the master of damping In the middle of structure in addition to arranging the antivibrator damping of routine, it is also provided with being vibrated by main structure and additional mass causing rotation Flywheel, utilizes the rotating mass of flywheel to replace a part of translation quality, and the translation quality that can replace referred to here as flywheel is equivalence Quality, reduces the deadweight of whole tuned mass damper device, i.e. reduces the quality of additional mass, improves effectiveness in vibration suppression.

A kind of tuned mass damper of technical solutions of the utility model, flywheel utilizes and is arranged on main structure and additional mass Ball-screw between block connects, and ball nut on ball-screw and the fixed cover that is connected with ball nut are by main structure and attached Add the relative displacement drive occurred when mass produces vibration to move along a straight line, utilize structure and the principle thereof of ball-screw, will The straight-line displacement of ball nut is converted into the rotary motion of ball-screw, and is realized flying by the sleeve on ball-screw and flywheel shaft The rotation of wheel, is provided with ball between ball nut and the ball-screw on ball-screw, greatly reduces ball nut and flies Frictional force when wheel rotates and between ball-screw, transmission efficiency is high, without sideshake between ball-screw and feed screw nut, rigidity High, it is possible to achieve the high-speed rotation of flywheel, make flywheel produce bigger movement inertia, it is possible to substitute the translation matter of additional mass Amount is big, i.e. the equivalent mass of flywheel is big.

A kind of tuned mass damper of technical solutions of the utility model, the equivalent mass size of flywheel is used to flywheel turns Amount is directly proportional, and is inversely proportional to ball-screw helical pitch, as required, by appropriate design, the size of equivalent mass can be made to reach The design of tens times of flywheel actual mass, the i.e. ball screw arrangement enlarge-effect to equivalent mass, this function is existing Suspension type, slide rail type and spur roller gear formula antivibrator in technology can not realize.

Accompanying drawing explanation

Fig. 1 is this utility model one tuned mass damper structural representation；

Fig. 2 is this utility model one tuned mass damper mechanical structure calculation diagram；

Fig. 3 is specific embodiment one structural representation of a kind of tuned mass damper of this utility model；

Fig. 4 is the mechanical structure calculation diagram of specific embodiment one in Fig. 3；

In Fig. 1 mark be respectively as follows: 21, main structure, 22, additional mass, 23, fixing seat, 25, flywheel shaft, 26, flywheel, 27, ball nut, 28, fixed cover, 29, ball-screw, 30, sleeve, 31, support seat, 32, antivibrator；

In Fig. 3 mark be respectively as follows: 1, main structure, 2, spring, 3, guide hole, 4, fixing guide pillar, 5, flywheel shaft, 6, the fixing end Seat, 8, additional mass, 9, antivibrator, 10, flywheel, 11, ball-screw, 12, feed screw nut, 13, fixed cover；

In Fig. 2, mark is for the ease of Mechanics Calculation, m1 and m2 represents main structure and the respective matter of additional mass respectively Amount, the displacement that x1 and x2 represents main structure respectively and additional mass each produces when being given a shock, J is that the rotation of flywheel is used to Amount, P is ball-screw helical pitch；

Fig. 4 is the mechanical structure sketch of specific embodiment one, and wherein k1 is the rigidity of main structure entirety self, and c1 is main knot Structure self damping overall, it is not in the range of this utility model tuned mass damper designs, but its be main structure oneself Body produces, m1 and m2 represents main structure and the respective quality of additional mass respectively, k2 and c2 represents of the present utility model respectively Spring in tuned mass damper structure and the rigidity of antivibrator and damping, x1 and x2 represents main structure and additional mass respectively The displacement that block each produces when being given a shock, J is the rotary inertia of flywheel, and P is ball-screw helical pitch.

Detailed description of the invention

For ease of skilled artisan understands that technical solutions of the utility model, new to this practicality in conjunction with Figure of description Type technical scheme is described further.

As it is shown in figure 1, a kind of tuned mass damper, including the additional mass 22 being connected with main structure 21, described attached Add and between mass 22 and main structure 21, be provided with antivibrator 32 and flywheel 26, through having flywheel shaft 25, institute on described flywheel 26 Stating flywheel shaft 25 one end to be connected with additional mass 22, the other end connects ball-screw 29, described ball-screw 29 and flywheel Axle 25 connects end and is provided with sleeve 30, and described flywheel shaft 25 is connected end and is placed in sleeve 30 with ball-screw 29, ball-screw 29 On be additionally provided with ball nut 27, described ball nut 27 is provided with fixed cover 28, described fixed cover 28 is with main structure 21 even Connecing, described flywheel shaft 26 is connected end and is additionally provided with flywheel fixing device with additional mass 21, and flywheel shaft 25 is fixed by flywheel Device is connected with additional mass 21.

As it is shown in figure 1, described flywheel shaft 25 is connected end with sleeve 30 is provided with external screw thread, in being provided with in described sleeve 30 Screw thread, described female thread engages with external screw thread.

Having support seat 31 as it is shown in figure 1, connect on described fixed cover 30, fixed cover 30 is by supporting seat 31 and main structure 21 Connecting, described fixed cover 30 is hinged with support seat 31.

As it is shown in figure 1, described flywheel fixing device includes the firm banking 23 affixed with additional mass 22, described fixing Base 23 is hinged with flywheel shaft 25, and flywheel shaft end is provided with hinged ball, and described flywheel shaft can rotate.

As it is shown in figure 1, be provided with bearing on described flywheel shaft 25, described flywheel 26 is fixed with flywheel shaft 25 by bearing.

As depicted in figs. 1 and 2, below according to Fig. 1 and Fig. 2 and combine Mechanics Calculation and mathematical calculation, to this utility model The operation principle of a kind of tuned mass damper and flywheel realize the replacement of additional mass translation quality to be carried out into calculation.

First set flywheel corner asWith two ends displacement of the lines s, inertia force is F_I, the equivalent mass of flywheel is b, just like ShiShimonoseki System:

Had by dynamic equilibrium condition

Equation (1) is substituted into (2) formula, has

$F_I={\left(\frac{2\mathrm{\π}}{p}\right)}^2\·J\·\stackrel{\·\·}{x}=b\·\stackrel{\·\·}{x}---\left(3\right)$

$\⇒b=J\·{\left(\frac{2\mathrm{\π}}{p}\right)}^2---\left(4\right)$

Can clearly be known by upper (4) formula: the equivalent mass b size of flywheel is directly proportional to rotary inertia J, leads with ball-screw Journey p is inversely proportional to, and as required, by appropriate design, the size of equivalent mass b can be made to reach the tens of flywheel actual mass Times, i.e. the design of the ball screw arrangement enlarge-effect to equivalent mass.

What deserves to be explained is: a kind of tuned mass damper of technical solutions of the utility model, the rotary inertia energy of flywheel Enough substitute the equivalent mass of additional mass, rationally can increase through appropriate design, but the rotary inertia of flywheel can not be complete Entirely replace additional mass, owing to rotating of flywheel needs to be driven by the relative motion of main structure and additional mass.

Above main describe for main technical schemes of the present utility model, in order to further to this utility model technology The understanding of scheme, is set forth below a kind of specific embodiment one:

As it is shown on figure 3, a kind of tuned mass damper, including the additional mass 8 being connected with main structure 1, additional mass It is provided with spring 2, antivibrator 9 and flywheel 10 between block 8 and main structure 1, pacifies in reality between additional mass 8 and main structure 1 Dress has a variety of connected mode, as hung installation, using spring installation etc., the present embodiment one uses spring install, fly Wheel 10 is horizontally placed between additional mass 8 and main structure 1, and through there being flywheel shaft 5 on flywheel 10, flywheel shaft 5 bottom connects There is ball-screw 11, ball-screw 11 is provided with ball nut 12, ball nut 12 is socketed with fixed cover 13, flywheel shaft 5 Being arranged in fixed cover 13, flywheel shaft 5 top connects has flywheel fixing device, flywheel fixing device to include and additional mass 8 Affixed firm banking 6, flywheel shaft 5 is hinged with firm banking 6, and in the present embodiment one, spring 2 is helical spring, helical spring Bottom is affixed with main structure 1, and top is affixed with additional mass 8, is provided with fixing guide pillar 4, additional mass 8 in helical spring On be provided with guide hole 3, affixed with main structure 1 bottom fixing guide pillar 4, top is through the guide hole 3 on additional mass 8, antivibrator 9 Bottom is affixed with main structure 1, and top is affixed with additional mass 8.

Main structure 1 described in this utility model is the agent structure needing to carry out damping, its can be high building, bridge, Tower etc..

In conjunction with Fig. 3 and Fig. 4, a kind of tuned mass damper of the present embodiment one and the rigidity of main structure self and damping group The entirety become has a following equation of motion:

$\{\begin{array}{c}(m_1+b)\·{\stackrel{\·\·}{x}}_1+(c_1+c_2)\·{\stackrel{\·}{x}}_1+(k_1+k_2)\·x_1-b\·{\stackrel{\·\·}{x}}_2-c_2\·{\stackrel{\·}{x}}_2-k_2\·x_2=F\left(t\right)\\ (m_2+b)\·{\stackrel{\·\·}{x}}_2+c_2\·({\stackrel{\·}{x}}_2-{\stackrel{\·}{x}}_1)+k_2\·(x_2-x_1)-b\·{\stackrel{\·\·}{x}}_1=0\end{array}---\left(5\right)$

By equation (5) it is found that flywheel can increase the effective mass of Tuned mass damper system, it is possible to reach to subtract Light antivibrator overall structure deadweight, increases the effect of damping efficiency.

Utility model is exemplarily described by technical solutions of the utility model above in conjunction with accompanying drawing, it is clear that this practicality Novel implementing is not subject to the restrictions described above, and carries out with technical scheme as long as have employed method of the present utility model design Various unsubstantialities improve, or the most improved design by utility model and technical scheme directly apply to other occasion, All within protection domain of the present utility model.

Claims (5)

1. a tuned mass damper, including the additional mass being connected with main structure, it is characterised in that described additional mass Being provided with antivibrator and flywheel between block and main structure, through there being flywheel shaft on described flywheel, described flywheel shaft one end is with additional Mass connects, and the other end connects ball-screw, and described ball-screw is connected end and is provided with sleeve, described flywheel with flywheel shaft Axle is connected end and is placed in sleeve with ball-screw, ball-screw is additionally provided with ball nut, described ball nut is provided with Fixed cover, described fixed cover is connected with main structure, and described flywheel shaft is connected end and is additionally provided with the fixing dress of flywheel with additional mass Putting, flywheel shaft is connected with additional mass by flywheel fixing device.

A kind of tuned mass damper the most according to claim 1, it is characterised in that connect on described fixed cover and have support Seat, fixed cover is connected with main structure by supporting seat, and described fixed cover is hinged with support seat.

A kind of tuned mass damper the most according to claim 1, it is characterised in that described flywheel shaft and sleeve connection end Being provided with external screw thread, be provided with female thread in described sleeve, described female thread engages with external screw thread.

A kind of tuned mass damper the most according to claim 1, it is characterised in that described flywheel fixing device include with The firm banking that additional mass is affixed, described firm banking is hinged with flywheel shaft.

A kind of tuned mass damper the most according to claim 1, it is characterised in that be provided with axle on described flywheel shaft Holding, described flywheel is fixed with flywheel shaft by bearing.