CN203239825U - Viscous fluid damper based on multi-hole throttling - Google Patents

Viscous fluid damper based on multi-hole throttling Download PDF

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CN203239825U
CN203239825U CN 201320281119 CN201320281119U CN203239825U CN 203239825 U CN203239825 U CN 203239825U CN 201320281119 CN201320281119 CN 201320281119 CN 201320281119 U CN201320281119 U CN 201320281119U CN 203239825 U CN203239825 U CN 203239825U
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porous
piston
damper
cylinder
fluid
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CN 201320281119
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关新春
李惠
欧进萍
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哈尔滨工业大学
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Abstract

The utility model relates to a viscous fluid damper based on multi-hole throttling. The viscous fluid damper comprises a cylinder body, wherein the two ends of the cylinder body are sealed through sealing pieces, a piston is mounted in a cylinder, the two ends of the piston are provided with two piston rods respectively, viscous fluid is filled in the cylinder body, the piston is provided with one or more axial throttling holes, transparent porous-structure materials are mounted in the throttling holes, a flowing channel formed by the porous structure is curved, and the viscous fluid can flow in or flow out from the porous-structure materials. Speed index adjustment of the damper can be achieved through adjustment of the hole structure, and therefore the constitutive relation of the damper can be greatly enriched, and designable products are made to be various. Meanwhile, large damping force is provided for a frame structure, the displacement and acceleration response of the frame structure is greatly lowered, and anti-shock performance of buildings is improved.

Description

基于多孔节流的粘滞流体阻尼器 Based porous throttling fluid viscous damper

技术领域 FIELD

[0001] 本实用新型涉及的是一种减振装置,具体地说是一种基于多孔节流的粘滞流体阻尼器。 [0001] The present invention relates to a damping device, in particular a porous throttling based viscous fluid damper.

背景技术 Background technique

[0002] 粘滞流体阻尼器是一种被动耗能减振装置,它主要包括缸体,设置于缸体内的活塞,安装在活塞两端的两个活塞杆,缸体两端的密封体和充填在缸体中的粘滞流体(见图1)。 [0002] The viscous fluid damper is a passive energy dissipation device, which includes a cylinder, a piston disposed in the cylinder, the piston rod is mounted in the two ends of the piston, the sealing member and filling both ends of the cylinder viscous fluid in the cylinder (see FIG. 1). 粘滞流体阻尼器的活塞上设有节流孔,当活塞与缸体产生相对运动时,粘滞流体从活塞一端通过节流孔流向另一端,进而产生与速度相关的粘滞阻尼力。 Viscous fluid damper orifice provided on the piston, when the piston and cylinder relative motion, the viscous fluid flow through the other end of the piston from one end of the orifice, thereby generating a speed-dependent viscous damping force. 已有粘滞阻尼器的节流孔主要是直通孔(如图2所示),也就是,在活塞上沿其轴向设置I个或通透孔。 Viscous damper has been mainly through the orifice hole (FIG. 2), i.e., the piston I is provided or transparent holes in its axial direction.

[0003] 粘滞阻尼器主要安装在框架结构的层间。 [0003] Viscous Damper mainly installed in the frame structure of the interlayer. 当结构在地震或风振作用下发生振动时,层间会产生相对变形,从而会引起粘滞阻尼器的活塞与缸体间产生相对运动,推动流体在节流孔之见来回流动,进而产生粘滞阻尼力。 When the vibrating structure occurs in seismic vibration or wind action, the interlayer produces a relatively deformed to cause the cylinder between the piston and viscous damper relative movement, push the fluid to flow back and forth to see the orifice, thereby generating viscous damping force.

[0004] 阻尼力的速度指数m仅能通过选用具有不同幂律指数α的流体来调节。 [0004] The index m of the speed damping force can only be adjusted by selecting different power law index α fluid. 由于在额定工作状态下,用于粘滞阻尼器的绝大多数粘滞流体的幂律指数基本相同,均为0.5到0.6之间。 Since the rated operation, a power law index of the vast majority of viscous fluid viscous damper is substantially the same, are between 0.5 and 0.6. 因此,基于直通孔结构很难设计其它范围内的速度指数的粘滞流体阻尼器。 Thus, based on the structure of the through hole is difficult to design an exponential rate within the range of other viscous fluid damper. 这限制了粘滞阻尼器的性能设计范围。 This limits the design performance range of viscous dampers.

实用新型内容 SUMMARY

[0005] 基于以上不足之处,本实用新型的目的在于提供一种基于多孔节流的粘滞流体阻尼器,用于桥梁以及土木结构的耗能减振装置,本发明可以实现低速度指数的粘滞阻尼器的设计。 [0005] Based on the above shortcomings, the present invention aims to provide a porous throttling based viscous fluid damper, for bridges and civil engineering structures of the energy dissipation apparatus, the present invention can be realized in the low speed index design viscous dampers. 在相近的情况下,速度指数越低,阻尼器的耗能能力也就越强。 In similar cases, the lower the speed index, energy dissipation capacity of the damper is also stronger.

[0006] 本实用新型的目的是这样实现的: [0006] The object of the present invention is achieved:

[0007] 一种基于多孔节流的粘滞流体阻尼器,它包括缸体,缸体两端通过密封体密封,活塞设置于缸体内,活塞的两端分别安装有两个活塞杆,缸体中充填有粘滞流体,活塞上开有多个平行于轴向的节流孔,节流孔内安装有通透的多孔结构材料,并且其多孔结构所形成的流道为弯曲的,粘滞流体能够从多孔结构材料中流入或流出。 [0007] Based on a porous throttling fluid viscous damper, comprising a cylinder, a sealing member sealed at both ends by the cylinder, a piston disposed in the cylinder, the two ends of the piston are respectively attached to two piston rods, cylinders body is filled with a viscous fluid, a plurality of orifice opening parallel to the axial direction, the throttle bore of the porous structure is mounted on the piston transparent material, and a porous structure which flow channel is formed as a curved, sticky lag fluid can flow into or out of the porous structural material.

[0008] 本实用新型还具有如下特征: [0008] The present invention also has the following characteristics:

[0009] 1、另外一种基于多孔节流的粘滞流体阻尼器,它包括缸体,缸体两端通过密封体密封,活塞安装于缸体内,活塞的两端分别安装有两个活塞杆,缸体中充填有粘滞流体,所述的活塞上开有一个或多个大的直通孔,直通孔内装填一定数量的固体颗粒,直通孔两端用开有多个小孔的端盖封住,固体颗粒不能从端盖漏出,通过调整直通孔的横截面积与固体颗粒的体积与填充量来改变阻尼力及其速度指数。 [0009] 1, based on another porous throttling fluid viscous damper, comprising a cylinder, a sealing member sealed at both ends by the cylinder, a piston mounted in the cylinder, the two ends of the piston are respectively attached to two pistons lever, the cylinder is filled with viscous fluid, to open one or more large holes through the piston, through-hole filling a number of solid particles, through-holes at both ends with open ends of a plurality of apertures cover seal, the solid particles can not leak from the end cap, and the damping force is changed by adjusting the volume and velocity index through-hole filling amount of the cross-sectional area of ​​the solid particles.

[0010] 2、如上所述的多孔结构材料为多孔陶瓷或多孔金属棒材。 [0010] 2, the porous structure of a porous ceramic material as described above or a porous metal bar.

[0011] 3、如上所述的基于多孔节流的粘滞流体阻尼器,通过调整容器和横截面积以及其装填的固体颗粒的体积和填充量,从而改变阻尼力及其速度指数。 [0011] 3, as described above based porous throttling fluid viscous damper, and by adjusting the cross-sectional area and the volume of the container and the filling amount thereof packed solid particles, thereby changing the damping force and speed index. [0012] 本实用新型通过调整孔结构可以实现阻尼器速度指数的调节。 Adjusting [0012] the present invention may be implemented to adjust the pore structure of the damper velocity index through. 这可以极大丰富阻尼器的本构关系,而使得可以设计的产品更加广泛。 This can greatly enrich damper constitutive relation, and makes it possible to design products more widely. 可以给框架结构提供较大的阻尼,大幅度地降低框架结构的位移和加速度反应,提高建筑物的抗震性能。 Large damping may be provided to the frame structure, and greatly reduce the acceleration response of displacement of the frame structure, improve the seismic performance of buildings.

附图说明 BRIEF DESCRIPTION

[0013] 图1为粘滞流体阻尼器结构示意图; [0013] FIG. 1 is a schematic structural viscous damper fluid;

[0014] 图2为粘滞阻尼器的节流孔为直通孔示意图; Orifice [0014] FIG. 2 is a viscous damper is a schematic view of a through hole;

[0015] 图3为节流孔为多孔结构中流体在节流孔内的流线图; [0015] FIG. 3 is an orifice in the porous structure of the fluid flow diagram of the throttle bore;

[0016] 图4为一种基于多孔节流的粘滞流体阻尼器的活塞示意图; [0016] FIG. 4 is a schematic diagram of a piston-based porous throttling viscous fluid damper;

[0017] 图5为活塞的直通孔内装填有一定数量的固体颗粒的示意图。 [0017] FIG. 5 is a schematic of a number of solid particles filling the through hole of the piston.

具体实施方式 detailed description

[0018] 实施例1 [0018] Example 1

[0019] 为了便于工程设计,粘滞阻尼器的阻尼力一般表示为下式 [0019] For ease of engineering, viscous damping force damper is generally expressed by the following formula

[0020] F = cVm (I) [0020] F = cVm (I)

[0021] 式中,F为阻尼器的阻尼力,c为粘滞系数,m为速度指数,V为活塞与缸体的相对运动速度。 [0021] In the formula, F is the damping force damper, c is viscosity coefficient, m is the index velocity, V is the relative velocity of the piston and the cylinder.

[0022] 已有粘滞阻尼器的节流孔主要是直通孔(如图2所示),也就是,在活塞上沿其轴向设置I个或通透孔。 [0022] viscous damper has been mainly through the orifice hole (FIG. 2), i.e., the piston I is provided or transparent holes in its axial direction.

[0023] 填充于缸体的液体的本构方程为 [0023] The constitutive equation of the liquid filled in the cylinder is

[0024] [0024]

Figure CN203239825UD00041

[0025] 式中τ为剪切应力,k为粘度系数,爹为剪切速率,α为幂律指数。 [0025] wherein τ is the shear stress, k is the coefficient of viscosity, shear rate father, [alpha] is the power law index.

[0026] 直通孔粘滞阻尼器的阻尼力可以简化表示为 [0026] The through-hole viscous damping force damper can be simplified as expressed

[0027] F = c(a,k,p)r (3) [0027] F = c (a, k, p) r (3)

[0028] 式中,粘滞系数c(a,k,p)是流体的粘度系数k,流体幂律指数a以及直通孔结构参数(表征孔直径、长度、数量以及结构等)P的函数。 [0028] In the formula, viscosity coefficient c (a, k, p) is the viscosity coefficient of the fluid k, a function of the fluid power law index parameters and the through pore structure (pore diameter characterizing, length, number and structure) P a. 阻尼力速度指数m与流体的幂律指数a相等。 Power law index damping force of the fluid speed index m is equal to a.

[0029] 公式(3)表明,通过选用具有不同粘度系数k和幂律指数a的粘滞流体以及调整孔的直径等结构来结构参数P,可以调整阻尼器阻尼力粘滞系数C的大小。 [0029] Equation (3) shows that the parameter P by a structure selected structural and viscous fluids having different viscosity adjusting hole coefficient k and a power law index of the diameter, etc., can resize the damping force of the damper C is the coefficient of viscosity.

[0030] 如图3所示,由于流道是弯弯曲曲的,与直通孔相比,流体在节流孔内的流线将更加复杂。 [0030] 3, since the flow passage is winding, compared with the through-bore, the throttle bore of the fluid flow lines will be more complicated. 由于孔喉效应,影响了流体的粘滞特性,因此所产生阻尼力的速度指数也与流体的幂律指数产生了差别。 Since the effect of pore throats, affect the viscous properties of the fluid, and therefore the damping force generated by the index generation speed differences and power law index of a fluid. 该类阻尼器的阻尼力可简单表示为。 Such damping force damper may simply be expressed as.

[0031] F = c(m,k)r(a'p) [0031] F = c (m, k) r (a'p)

[0032] 式中,粘滞系数c(a,k,p)是流体的粘度系数k,流体幂律指数a以及直通孔结构参数(表征孔直径、长度、数量以及结构等)P的函数。 [0032] In the formula, viscosity coefficient c (a, k, p) is the viscosity coefficient of the fluid k, a function of the fluid power law index parameters and the through pore structure (pore diameter characterizing, length, number and structure) P a. 阻尼力速度指数m不再等于流体的幂律指数a,而是幂律指数a与直通孔结构参数P的函数,在a固定的情况下,通过调整直通孔结构参数P也可以调整速度指数。 No damping force speed index m is equal to a power law index of a fluid, but a power law index of the through hole P is a function of structural parameters, in a case of a fixed, by adjusting the through-pore structure parameter P may adjust the speed index. 也就是说,通过调整小孔的数量与形状就可以调整速度指数。 In other words, by adjusting the number and shape of the aperture can be adjusted speed index. 由于孔喉效应,影响了流体的粘滞特性,因此所产生阻尼力的速度指数也与流体的幂律指数产生了差别。 Since the effect of pore throats, affect the viscous properties of the fluid, and therefore the damping force generated by the index generation speed differences and power law index of a fluid.

[0033] 实施例2 [0033] Example 2

[0034] 一种基于多孔节流的粘滞流体阻尼器,它包括缸体,缸体两端通过密封体密封,活塞安装于缸体内,活塞的两端分别安装有两个活塞杆,缸体中充填有粘滞流体,活塞上开有一个或多个平行于轴向的节流孔,节流孔内安装有通透的多孔结构材料,并且其多孔结构所形成的流道为弯曲的,粘滞流体能够从多孔结构材料中流入或流出。 [0034] Based on a porous throttling fluid viscous damper, comprising a cylinder, a sealing member sealed at both ends by the cylinder, a piston mounted in the cylinder, the two ends of the piston are respectively attached to two piston rods, cylinders body is filled with viscous fluid, to open one or more parallel to the axial orifice, attached to the throttle bore permeable porous structural material on the piston and the flow passage which the porous structure is formed as a curved viscous fluid can flow into or out of the porous structural material. 所述的多孔结构材料为多孔陶瓷或多孔金属棒材。 The porous structural material is a porous ceramic or a porous metal bar. 如图3所示,本发明的节流孔为多孔结构,流体的流动通道并非直线而是弯弯曲曲的折线。 As shown in FIG. 3, the orifice of the invention is a porous structure, a fluid flow path is not a straight line but a winding polyline.

[0035] 实施例3 [0035] Example 3

[0036] 如图4-5所示,一种基于多孔节流的粘滞流体阻尼器,它包括缸体,缸体两端通过密封体密封,活塞安装于缸体内,活塞的两端分别安装有两个活塞杆,缸体中充填有粘滞流体,所述的活塞上开有一个或多个大的直通孔,而后在直通孔内装填一定数量的固体颗粒,直通孔两端用开有多个小孔的端盖封住,固体颗粒不能从端盖漏出,通过调整直通孔的横截面积与固体颗粒的体积与填充量来改变阻尼力及其速度指数。 [0036] As shown, based porous throttling fluid viscous damper, comprising a cylinder, a sealing member sealed at both ends by the cylinder, a piston mounted in the cylinder, the piston ends respectively 4-5 are mounted two piston rods, the cylinder is filled with viscous fluid, to open one or more large aperture through said piston, and then charged in a number of solid particles through hole, the through hole opening at both ends a plurality of apertures sealed end cap, the solid particles can not leak from the end cap, and the damping force is changed by adjusting the velocity index through-hole cross-sectional area and volume of solid particles filling amount.

[0037] 对于该结构,如果选用粘度系数130Ns/m2的硅油为粘滞流体,简化公式计算表明,阻尼器的速度指数如下表所示。 [0037] With this structure, if the viscosity coefficient of the silicone oil selected 130Ns / m2 of viscous fluid, it shows a simplified formula, the damper speed index table below. 该表表明,通过调整球床直径以及装填颗粒的直径,可以实现速度指数的大幅度调节。 The table shows that, by adjusting the diameter of the ball packed bed and the diameter of the particles can be adjusted to achieve a significant exponential rate. 对于其它方式组成的多孔结构也具有类似的效应。 For another embodiment the porous structure consisting also have a similar effect.

[0038] 表I多孔粘滞阻尼器结构参数和速度指数 [0038] TABLE I Viscous dampers porous structure parameters and the speed index

Figure CN203239825UD00051

[0040] 注:球床直径是指在活塞上预设的填充颗粒的大孔的直径。 [0040] Note: pebble bed diameter refers to the diameter of the macropores preset on the piston of the filler particles.

[0041] 一旦阻尼器的使用速度超过其预测最大速度以后,其阻尼力增长的幅度随速度指数的降低而降低。 [0041] Once the damper using a speed which exceeds the predicted maximum speed, a damping force which decreases with the growth rate of the speed index is reduced. 这样的好处是一旦阻尼器在使用过程中超过了最大速度(比如结构遇到了更大的地震),这时阻尼器提供给结构的力比预期的增长幅度不大。 The advantage is that once the damper in the course exceed the maximum speed (such as structural encountered greater earthquake), when the damper is not provided to the force structure than expected growth. 这样不会因为阻尼力过大而造成与阻尼器相连的结构主体的破坏。 Such damping force will not be too large and damage of the structural body connected to the damper. 有利于结构安全。 Conducive to structural safety.

Claims (4)

  1. 1.一种基于多孔节流的粘滞流体阻尼器,它包括缸体,缸体两端通过密封体密封,活塞设置于缸体内,活塞的两端分别安装有两个活塞杆,缸体中充填有粘滞流体,其特征在于:活塞上开有一个或多个平行于轴向的节流孔,节流孔内安装有通透的多孔结构材料,并且其多孔结构所形成的流道为弯曲的,粘滞流体能够从多孔结构材料中流入或流出。 1. Based on a porous throttling fluid viscous damper, comprising a cylinder, a sealing member sealed at both ends by the cylinder, a piston disposed in the cylinder, the two ends of the piston are respectively attached to two piston rods, the cylinder is filled with viscous fluid, comprising: an orifice open to a piston or a plurality of parallel to the axial direction, is attached to the throttle bore of the porous structural material transparent, and the flow channel which is formed a porous structure is curved, the viscous fluid can flow into or out of the porous structural material.
  2. 2.根据权利要求1所述一种基于多孔节流的粘滞流体阻尼器,其特征在于:所述的活塞上或开有一个或多个大的直通孔,直通孔内装填一定数量的固体颗粒,直通孔两端用开有多个小孔的端盖封住,固体颗粒不能从端盖漏出。 2. The method of claim 1 based porous throttling fluid viscous damper, wherein: said piston has one or more open or large through holes, the through-hole filling a number of solid particles, both ends of the through-hole opening and with a plurality of apertures sealed end cap, the solid particles do not leak from the end cap.
  3. 3.根据权利要求1所述的一种基于多孔节流的粘滞流体阻尼器,其特征在于:所述的多孔结构材料为多孔陶瓷或多孔金属棒材。 According to one of the claims 1 based porous throttling fluid viscous damper, wherein: said structural material is a porous ceramic or a porous metal bar.
  4. 4.根据权利要求2所述的一种基于多孔节流的粘滞流体阻尼器,其特征在于:通过调整容器和横截面积以及其装填的固体颗粒的体积和填充量,从而改变阻尼力及其速度指数。 According to one of the claims 2 based porous throttling fluid viscous damper, wherein: by adjusting the cross-sectional area and the volume of the container and the filling amount thereof and packed solid particles, and to change the damping force its speed index.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103244598A (en) * 2013-05-16 2013-08-14 哈尔滨工业大学 Viscous fluid damper based on porous throttling
CN106801379A (en) * 2017-01-22 2017-06-06 北京工业大学 Speed lock-up device
CN107687492A (en) * 2016-12-14 2018-02-13 北京久硕新材科技发展有限公司 Automotive shock absorber with micro porous metal fiber felt as damping element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103244598A (en) * 2013-05-16 2013-08-14 哈尔滨工业大学 Viscous fluid damper based on porous throttling
CN103244598B (en) * 2013-05-16 2015-04-01 哈尔滨工业大学 Viscous fluid damper based on porous throttling
CN107687492A (en) * 2016-12-14 2018-02-13 北京久硕新材科技发展有限公司 Automotive shock absorber with micro porous metal fiber felt as damping element
CN106801379A (en) * 2017-01-22 2017-06-06 北京工业大学 Speed lock-up device

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