CN107975563A - A kind of viscous damper based on fluid momentum principle of reflection - Google Patents

A kind of viscous damper based on fluid momentum principle of reflection Download PDF

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CN107975563A
CN107975563A CN201711200919.5A CN201711200919A CN107975563A CN 107975563 A CN107975563 A CN 107975563A CN 201711200919 A CN201711200919 A CN 201711200919A CN 107975563 A CN107975563 A CN 107975563A
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piston
fluid
reflection
compression spring
symmetrical
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CN107975563B (en
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李晓艳
班书昊
王知鸷
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Changzhou University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
    • F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/3405—Throttling passages in or on piston body, e.g. slots

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

The invention discloses a kind of viscous damper based on fluid momentum principle of reflection, belongs to liquid condenser vibration isolation field.It includes damped cylinder body, end cap A and end cap B, symmetrical piston modules A and symmetrical piston modules B, and the spiral compression spring A being installed on end cap A, is installed in the viscous fluid of damped cylinder body interior, and the spiral compression spring B being installed on end cap B；It is simply connected cross-section circular through hole that fluid reflection throttle orifice is offered in symmetrical piston modules A, B, is made of n roads radial direction straight channel and (n+1) road axial direction straight channel, n for more than even number；The length of axial straight channel is at least more than 5 times of radial direction straight channel.The present invention is a kind of viscous damper that damping force is realized with stable equilibrium position, by fluid momentum reflection and is adjusted.

Description

一种基于流体动量反射原理的粘性阻尼器A viscous damper based on the principle of fluid momentum reflection

技术领域technical field

本发明属于液体阻尼器隔振领域，特指一种基于流体动量反射原理的粘性阻尼器。The invention belongs to the field of liquid damper vibration isolation, in particular to a viscous damper based on the principle of fluid momentum reflection.

背景技术Background technique

液体阻尼器是一种智能减振仪器，现有的液体变阻尼器一般是在充满粘滞流体的工作缸内安装活塞，依靠改变流体流动的工作间隙实现阻尼力的改变。现有技术的液体阻尼器虽然实现了变阻尼，但是仍存在着一定的缺陷，即外力消失后活塞难以精确回到初始平衡位置。因此，设计一种能够精确回到初始平衡位置的液体变阻尼器具有重要的价值。The liquid damper is an intelligent vibration reduction device. The existing liquid variable damper generally installs a piston in a working cylinder filled with viscous fluid, and changes the damping force by changing the working gap of the fluid flow. Although the liquid damper in the prior art realizes variable damping, it still has certain defects, that is, it is difficult for the piston to accurately return to the initial equilibrium position after the external force disappears. Therefore, it is of great value to design a liquid variable damper that can accurately return to the initial equilibrium position.

发明内容Contents of the invention

本发明需解决的技术问题是：针对现有技术存在的技术问题，本发明提供一种具有稳定平衡位置、依靠流体动量反射实现阻尼力调节的粘性阻尼器。The technical problem to be solved by the present invention is: aiming at the technical problems existing in the prior art, the present invention provides a viscous damper which has a stable equilibrium position and realizes damping force adjustment by fluid momentum reflection.

为了解决上述问题，本发明提出的解决方案为：一种基于流体动量反射原理的粘性阻尼器，它包括阻尼缸本体、装设于所述阻尼缸本体两端的端盖A和端盖B、对称活塞模块A和对称活塞模块B，装设于所述端盖A上的螺旋压缩弹簧A，装设于所述阻尼缸本体内部的粘滞流体，以及装设于所述端盖B上的螺旋压缩弹簧B。In order to solve the above problems, the solution proposed by the present invention is: a viscous damper based on the principle of fluid momentum reflection, which includes a damping cylinder body, end caps A and B installed at both ends of the damping cylinder body, symmetrical The piston module A and the symmetrical piston module B, the helical compression spring A installed on the end cover A, the viscous fluid installed inside the damping cylinder body, and the helical spring A installed on the end cover B Compress spring B.

所述对称活塞模块A和对称活塞模块B反对称装设于所述阻尼缸本体的内部，且可沿所述阻尼缸本体的内壁自由滑动。The symmetrical piston module A and the symmetrical piston module B are anti-symmetrically installed inside the damping cylinder body, and can slide freely along the inner wall of the damping cylinder body.

所述对称活塞模块A包括活塞A和活塞杆A，所述活塞杆A的一端装设于所述活塞A上，另一端穿过所述端盖A延伸到所述阻尼缸本体的外部，所述活塞A上开设有可以使流体发生动量反射的流体反射节流孔A；所述螺旋压缩弹簧A的另一端自由，所述活塞杆A穿过所述螺旋压缩弹簧A。The symmetrical piston module A includes a piston A and a piston rod A, one end of the piston rod A is installed on the piston A, and the other end extends through the end cover A to the outside of the damping cylinder body, so The piston A is provided with a fluid reflection orifice A capable of momentum reflection of the fluid; the other end of the helical compression spring A is free, and the piston rod A passes through the helical compression spring A.

所述对称活塞模块B包括活塞B和活塞杆B，所述活塞杆B的一端装设于所述活塞B上，另一端穿过所述端盖B延伸到所述阻尼缸本体的外部，所述活塞B上开设有可以使流体发生动量反射的流体反射节流孔B；所述螺旋压缩弹簧B8的另一端自由，所述活塞杆B穿过所述螺旋压缩弹簧B。The symmetrical piston module B includes a piston B and a piston rod B, one end of the piston rod B is installed on the piston B, and the other end extends through the end cover B to the outside of the damping cylinder body, so The piston B is provided with a fluid reflection orifice B that can reflect momentum of the fluid; the other end of the helical compression spring B8 is free, and the piston rod B passes through the helical compression spring B.

所述螺旋压缩弹簧A和所述螺旋压缩弹簧B均为零受力状态时，所述对称活塞模块A和对称活塞模块B处于初始平衡位置。When both the helical compression spring A and the helical compression spring B are under zero stress, the symmetrical piston module A and the symmetrical piston module B are in an initial equilibrium position.

所述流体反射节流孔A与流体反射节流孔B结构完全相同，但关于所述阻尼缸本体的正中横截面对称；所述流体反射节流孔为单连通等截面圆形通孔，由n道径向直通道与(n+1)道轴向直通道组成，n为大于的偶数；所述轴向直通道的长度至少为所述径向直通道的5倍以上；所述相邻的径向直通道与轴向直通道对应相连；所述流体反射节流孔A和流体反射节流孔B均只有一个入口和一个出口。The fluid reflection orifice A has the same structure as the fluid reflection orifice B, but they are symmetrical about the central cross-section of the damping cylinder body; the fluid reflection orifice is a single-connected circular through hole with equal cross-section. n radial straight passages and (n+1) axial straight passages, n is an even number greater than; the length of the axial straight passages is at least 5 times that of the radial straight passages; the adjacent The radial straight channel of the radial channel is correspondingly connected with the axial straight channel; the fluid reflection orifice A and the fluid reflection orifice B both have only one inlet and one outlet.

本发明与现有技术相比，具有如下优点和有益效果：Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1)本发明的一种基于流体动量反射原理的粘性阻尼器设有流体反射节流孔A与流体反射节流孔B，使得流体的动量与活塞反复发生反射，从而实现阻尼力的调节。(1) A viscous damper based on the fluid momentum reflection principle of the present invention is provided with a fluid reflection orifice A and a fluid reflection orifice B, so that the momentum of the fluid and the piston are repeatedly reflected, thereby realizing the adjustment of the damping force.

(2)本发明的一种基于流体动量反射原理的粘性阻尼器还设有螺旋压缩弹簧A和螺旋压缩弹簧B，且螺旋压缩弹簧靠近活塞的一端自由，从而使得活塞在外界激励作用下仍然可以稳定地回到初始平衡位置，且有效抑制了活塞在静止前往复振动。(2) A viscous damper based on the fluid momentum reflection principle of the present invention is also provided with a helical compression spring A and a helical compression spring B, and the end of the helical compression spring close to the piston is free, so that the piston can still It returns to the initial balance position stably, and effectively suppresses the reciprocating vibration of the piston before it is at rest.

附图说明Description of drawings

图1是本发明的一种基于流体动量反射原理的粘性阻尼器的结构原理图。Fig. 1 is a structural principle diagram of a viscous damper based on the principle of fluid momentum reflection according to the present invention.

图中，1—活塞杆A；2—活塞杆B；3—端盖A；4—端盖B；5—活塞A；6—活塞B；7—螺旋压缩弹簧A；8—螺旋压缩弹簧B；9—流体反射节流孔A；10—流体反射节流B；11—阻尼缸本体；12—粘滞流体。In the figure, 1—piston rod A; 2—piston rod B; 3—end cover A; 4—end cover B; 5—piston A; 6—piston B; 7—coil compression spring A; 8—coil compression spring B ; 9—fluid reflection orifice A; 10—fluid reflection throttle B; 11—damping cylinder body; 12—viscous fluid.

具体实施方式Detailed ways

以下将结合附图和具体实施例对本发明作进一步详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

参见图1所示，本发明的一种基于流体动量反射原理的粘性阻尼器，包括阻尼缸本体11、装设于阻尼缸本体11两端的端盖A3和端盖B4、对称活塞模块A和对称活塞模块B，装设于端盖A3上的螺旋压缩弹簧A7，装设于阻尼缸本体11内部的粘滞流体12，以及装设于端盖B4上的螺旋压缩弹簧B8。Referring to Fig. 1, a viscous damper based on the principle of fluid momentum reflection according to the present invention includes a damping cylinder body 11, end caps A3 and B4 installed at both ends of the damping cylinder body 11, a symmetrical piston module A and a symmetrical The piston module B, the helical compression spring A7 installed on the end cover A3, the viscous fluid 12 installed inside the damping cylinder body 11, and the helical compression spring B8 installed on the end cover B4.

对称活塞模块A和对称活塞模块B反对称装设于阻尼缸本体11的内部，且可沿阻尼缸本体11的内壁自由滑动。The symmetrical piston module A and the symmetrical piston module B are anti-symmetrically installed inside the damping cylinder body 11 and can slide freely along the inner wall of the damping cylinder body 11 .

对称活塞模块A包括活塞A5和活塞杆A1，活塞杆A1的一端装设于活塞A5上，另一端穿过端盖A3延伸到阻尼缸本体11的外部，活塞A5上开设有可以使流体发生动量反射的流体反射节流孔A9；螺旋压缩弹簧A7的另一端自由，活塞杆A1穿过螺旋压缩弹簧A7。The symmetrical piston module A includes a piston A5 and a piston rod A1. One end of the piston rod A1 is installed on the piston A5, and the other end extends through the end cover A3 to the outside of the damping cylinder body 11. The piston A5 is provided with a valve that can make the fluid generate momentum. The reflected fluid reflects the orifice A9; the other end of the helical compression spring A7 is free, and the piston rod A1 passes through the helical compression spring A7.

对称活塞模块B包括活塞B6和活塞杆B2，活塞杆B2的一端装设于活塞B6上，另一端穿过端盖B4延伸到阻尼缸本体11的外部，活塞B6上开设有可以使流体发生动量反射的流体反射节流孔B10；螺旋压缩弹簧B8的另一端自由，活塞杆B2穿过螺旋压缩弹簧B8。The symmetrical piston module B includes a piston B6 and a piston rod B2. One end of the piston rod B2 is installed on the piston B6, and the other end extends through the end cover B4 to the outside of the damping cylinder body 11. The piston B6 is provided with a valve that can make the fluid generate momentum. The reflected fluid reflects the orifice B10; the other end of the helical compression spring B8 is free, and the piston rod B2 passes through the helical compression spring B8.

螺旋压缩弹簧A7和螺旋压缩弹簧B8均为零受力状态时，对称活塞模块A和对称活塞模块B处于初始平衡位置。When both the helical compression springs A7 and the helical compression springs B8 are under zero stress, the symmetrical piston module A and the symmetrical piston module B are in an initial equilibrium position.

流体反射节流孔A9与流体反射节流孔B10结构完全相同，但关于阻尼缸本体11的正中横截面对称；流体反射节流孔为单连通等截面圆形通孔，由n道径向直通道与(n+1)道轴向直通道组成，n为大于2的偶数；轴向直通道的长度至少为径向直通道的5倍以上；相邻的径向直通道与轴向直通道对应相连；流体反射节流孔A9和流体反射节流孔B10均只有一个入口和一个出口。The structure of the fluid reflection orifice A9 is exactly the same as that of the fluid reflection orifice B10, but it is symmetrical about the central cross-section of the damping cylinder body 11; the fluid reflection orifice is a single-connected circular through hole with equal cross-section, which is directly connected by n channels radially Road and (n+1) axial straight channels, n is an even number greater than 2; the length of the axial straight channel is at least 5 times that of the radial straight channel; adjacent radial straight channels and axial straight channels They are connected correspondingly; both the fluid reflection orifice A9 and the fluid reflection orifice B10 have only one inlet and one outlet.

工作原理：活塞A5和活塞B6处于初始位置时，螺旋压缩弹簧A7和螺旋压缩弹簧B8处于零受力状态，故初始位置为平衡位置；螺旋压缩弹簧靠近活塞的一端为自由模式，从而使得活塞A5相对于活塞B6靠近时，活塞A5和活塞B6不受弹簧力的作用，从而有效抑制了活塞静止前的往复运动；活塞A5和活塞B6同步反向运动，粘滞流体12经流体反射节流孔流动，由于流体反射节流孔为n道径向直通道与(n+1)道轴向直通道组成，且轴向直通道的长度至少为径向直通道的5倍以上，从而使得粘性流体12流动产生的动量不断冲击和反射两活塞，从而实现活塞阻尼力的调节；两个螺旋压缩弹簧受到压缩发生一定的变形，储存弹性势能，当外界干扰力或激励力消失后，该弹性势能将由流体反射节流孔自由释放，只是两活塞回到初始平衡位置，从而确保两个活塞杆具有稳定的平衡位置。Working principle: when the piston A5 and piston B6 are in the initial position, the helical compression spring A7 and the helical compression spring B8 are in a state of zero stress, so the initial position is a balanced position; the end of the helical compression spring close to the piston is in a free mode, so that the piston A5 When approaching the piston B6, the piston A5 and the piston B6 are not affected by the spring force, thus effectively suppressing the reciprocating motion before the piston is still; the piston A5 and the piston B6 move in reverse synchronously, and the viscous fluid 12 passes through the fluid reflection orifice Flow, because the fluid reflection orifice is composed of n radial straight channels and (n+1) axial straight channels, and the length of the axial straight channels is at least 5 times that of the radial straight channels, so that the viscous fluid 12 The momentum generated by the flow continuously impacts and reflects the two pistons, thereby realizing the adjustment of the piston damping force; the two helical compression springs are compressed and deformed to a certain extent, storing elastic potential energy. When the external disturbance force or excitation force disappears, the elastic potential energy will be by The fluid reflection orifice is free to release, and only the two pistons return to the initial equilibrium position, thus ensuring the stable equilibrium position of the two piston rods.

Claims (1)

1. a kind of viscous damper based on fluid momentum principle of reflection, including damped cylinder body (11), it is installed in the damping End cap A (3) and end cap B (4), the symmetrical piston modules A and symmetrical piston modules B at cylinder body (11) both ends, are installed in the end The spiral compression spring A (7) on A (3) is covered, is installed in the internal viscous fluid (12) of the damped cylinder body (11), and dress Spiral compression spring B (8) on the end cap B (4), it is characterised in that：
The symmetrical piston modules A and symmetrical piston modules B antisymmetry are installed in the inside of the damped cylinder body (11), and can It is free to slide along the inner wall of the damped cylinder body (11)；
The symmetrical piston modules A includes piston A (5) and piston rod A (1), described in one end of the piston rod A (1) is installed in On piston A (5), the other end extends to the outside of the damped cylinder body (11), the piston A (5) through the end cap A (3) On offer can make fluid occur momentum reflection fluid reflection throttle orifice A (9)；The spiral compression spring A (7) it is another Freely, the piston rod A (1) passes through the spiral compression spring A (7) at end；
The symmetrical piston modules B includes piston B (6) and piston rod B (2), described in one end of the piston rod B (2) is installed in On piston B (6), the other end extends to the outside of the damped cylinder body (11), the piston B (6) through the end cap B (4) On offer can make fluid occur momentum reflection fluid reflection throttle orifice B (10)；The spiral compression spring B (8) it is another One end is free, and the piston rod B (2) passes through the spiral compression spring B (8)；
When the spiral compression spring A (7) and the spiral compression spring B (8) they are zero stress, the symmetrical piston mould Block A and symmetrical piston modules B are in initial rest position；
The fluid reflection throttle orifice A (9) is identical with fluid reflection throttle orifice B (10) structure, but on the damped cylinder The center cross section of body (11) is symmetrical；The fluid reflection throttle orifice is simply connected cross-section circular through hole, radially straight by n roads Passage is formed with (n+1) road axial direction straight channel, and n is the even number more than 2；The length of the axial direction straight channel is at least the radial direction More than 5 times of straight channel；The adjacent radial direction straight channel is corresponding with axial straight channel to be connected；The fluid reflection throttle orifice A (9) and fluid reflection throttle orifice B (10) only has an entrance and one outlet.
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CN109268428A (en) * 2018-11-02 2019-01-25 常州大学 A kind of fluid damper based on the symmetrical vibration isolation of non-linear rigidity
CN109611500A (en) * 2019-01-25 2019-04-12 江苏容大减震科技股份有限公司 A kind of compact type bilayer viscous damper with reset function
CN110295557A (en) * 2019-07-15 2019-10-01 中南大学 A kind of avoiding collision that adaptive deformation that resisting uneven impact force resets

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CN104712702A (en) * 2013-12-13 2015-06-17 通用汽车环球科技运作有限责任公司 Height adjustable damping device
CN204113992U (en) * 2014-09-11 2015-01-21 重庆小康工业集团股份有限公司 Automobile mazy type vibration damper
CN104481047A (en) * 2014-12-08 2015-04-01 湖南科技大学 External adjustable viscous damper with function of speed and displacement locking
CN105179572A (en) * 2015-07-19 2015-12-23 常州大学 Double-rod multistage-diffraction magneto-rheological damper
CN105156567A (en) * 2015-07-20 2015-12-16 常州大学 Double-rod multi-stage diffraction passive dual-control variable-damping magneto-rheological damper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109268428A (en) * 2018-11-02 2019-01-25 常州大学 A kind of fluid damper based on the symmetrical vibration isolation of non-linear rigidity
CN109268428B (en) * 2018-11-02 2020-05-26 常州大学 Fluid vibration isolator based on nonlinear rigidity symmetric vibration isolation
CN109611500A (en) * 2019-01-25 2019-04-12 江苏容大减震科技股份有限公司 A kind of compact type bilayer viscous damper with reset function
CN110295557A (en) * 2019-07-15 2019-10-01 中南大学 A kind of avoiding collision that adaptive deformation that resisting uneven impact force resets

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