CN111677807A - Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper - Google Patents
Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper Download PDFInfo
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- CN111677807A CN111677807A CN202010543602.7A CN202010543602A CN111677807A CN 111677807 A CN111677807 A CN 111677807A CN 202010543602 A CN202010543602 A CN 202010543602A CN 111677807 A CN111677807 A CN 111677807A
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- electrorheological fluid
- piezoelectric ceramic
- piezoelectric
- damper
- damping
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- 239000000919 ceramic Substances 0.000 title claims abstract description 33
- 239000012530 fluid Substances 0.000 title claims abstract description 28
- 238000010168 coupling process Methods 0.000 title claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 13
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 5
- 238000013016 damping Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000007667 floating Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims 2
- 230000005684 electric field Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002520 smart material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/532—Electrorheological [ER] fluid dampers
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
-
- 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
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0275—Ceramics
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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
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0283—Materials; Material properties solids piezoelectric; electro- or magnetostrictive
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper. It is mainly composed of piezoelectric energy supply part and damping cavity part. The springs and the compression spring plate are symmetrically arranged about a set of piezoelectric ceramics. When the piston rod is vibrated by the outside, the compression spring plates and the springs which are symmetrically arranged up and down move together with the piston rod to apply pressure on the piezoelectric ceramics to generate voltage. In the compression and recovery two-way stroke, the piezoelectric ceramics are always pressed to generate induced voltage and are connected to the inner electrode and the outer electrode through the leads, an electric field is generated between the annular damping channels, the viscosity of the electrorheological fluid between the annular damping channels is increased under the action of the electric field, and the upper cavity and the lower cavity of the damper form pressure difference so as to reduce the vibration of the piston. The larger the vibration amplitude of the piston is, the higher the voltage is generated, and the larger the resistance generated by the electrorheological fluid is, so that the purpose of self-coupling vibration reduction of the system is achieved. The invention reduces the quantity of the piezoelectric ceramics, achieves the effect of double-pass power supply, improves the utilization efficiency of the piezoelectric ceramics and saves the space.
Description
Technical Field
The invention relates to a novel electrorheological fluid damper, which is an intelligent damper capable of self-coupling vibration reduction along with external vibration amplitude without an external power supply during working.
Background
Electrorheological fluids (ERF fluids) are smart materials, which are typically suspensions of micron (or nanometer) sized particles with high dielectric constants uniformly dispersed in an insulating, low dielectric constant, oil phase medium. When an external electric field is applied, the ERF fluid transitions from a fluid state to a solid-like state, with a sharp increase in apparent viscosity of several orders of magnitude and higher shear stresses. The process is reversible, controllable, rapid and low power consuming. These excellent electromechanical coupling properties allow the ERF fluids to effectively address energy transfer and control problems in mechanical engineering. Zhao Xiaopeng et al in a patent of a self-coupling current transformation liquid damper without external power supply (ZL 02139476.8), designed with a piezoelectric ceramic power supply adaptive current transformation liquid damper, omitted the external power supply, but the whole damper only works in the process of downward compression, generates damping, and there is no variable damping in the return stroke. The volume change of the inner cavity of the damper caused by the piston rod is not considered in the damper, and the damper can hardly be realized in practical application. Liuwei et al have adopted the piezoceramics symmetrical arrangement in "a novel piezoceramics and electrorheological fluid self-coupling attenuator" (CN 110195760A) in the patent, have realized that compression and two strokes of recovering all can extrude piezoceramics and produce induced voltage with spring and pressure spring board, but the attenuator still only has half piezoceramics to play in every stroke, and second half piezoceramics does not work, and symmetrical arrangement does not reduce piezoceramics's use amount like this, does not play the effect of increase induced voltage yet. The above two dampers have their own drawbacks, which limit their application.
Disclosure of Invention
The invention aims to provide a bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper which has the characteristics of simple structure, small volume, large stroke, direct stress, large vibration resistance amplitude, small rigidity and the like. The damper utilizes two sets of springs and compression spring plates, and is arranged in a vertically symmetrical manner with respect to the piezoelectric ceramic, so that the piezoelectric ceramic can be always extruded in a two-way stroke to generate voltage, the piezoelectric ceramic works in stretching and compressing strokes, and the utilization efficiency is greatly improved. The structure does not need two groups of piezoelectric ceramics to respectively provide voltages of two strokes, so that the arrangement number of the piezoelectric ceramics can be reduced by half under the requirement of the same output damping force.
Drawings
Fig. 1 is a front sectional view of a piezoelectric ceramic and electrorheological fluid self-coupling damper provided in the invention. The components and numbers in fig. 1 are:
1. the outer cylinder 2, the inner cylinder 3, the annular damping channel 4, the inner electrode plate 5, the outer electrode plate 6, the flow hole 7, the gasket 8, the hexagon nut 9, the bolt 10, the compression spring plate 11, the piston rod 12, the lower spring 13, the piezoelectric ceramic 14, the upper spring 15, the top cover 16, the end cover 17, the straight cylinder 18, the fixed plate 19, the lead 20, the O-shaped sealing ring 21, the air chamber 22, the annular floating piston 23, the electrorheological fluid 24 and the piston.
Detailed Description
The purpose of the invention is realized as follows: the structure of the present invention is shown in fig. 1. The piezoelectric energy supply part consists of a piston rod (11), a compression spring plate (10), a lower spring (12), piezoelectric ceramics (13), an upper spring (14), a fixed plate (18) and a lead (19); a damping chamber part consisting of an annular damping channel (3), an inner electrode plate (4), an outer electrode plate (5), a circulation hole (6) and electrorheological fluid (23); in addition, the air chamber (21) and the annular floating piston (22) complete the volume compensation of the damping cavity; the damper is packaged by the outer cylinder (1), the inner cylinder (2), the gasket (7), the hexagon nut (8), the bolt (9), the top cover (15), the O-shaped sealing ring (20) and the like. The piezoelectric ceramic electrorheological fluid damping device is characterized in that a piezoelectric energy supply part and a damping cavity part are sequentially connected up and down, symmetrically distributed springs and compression spring plates can enable piezoelectric ceramics to be pressed in two directions to generate voltage, a damping channel is formed between an inner polar plate and an outer polar plate which are fixed on an inner cylinder and an outer cylinder, and an upper circulation hole and a lower circulation hole (6) are formed in the inner cylinder (2) to complete circulation of electrorheological fluid in the working process.
The piston rod (11) is permanently connected to the piston (24). The compression spring plate (10) is fixed on the piston rod (11), and the compression spring plate (10) is connected with the springs (12, 14). The piston rod (11) is connected with the external force application mechanism through the end cover (16) and the center hole of the top cover (15). The top cover (15) is connected with the damper outer cylinder (1) through threads.
The spring is divided into two sections which are connected with the pressure spring plate (10) and the fixed plate (18), and the fixed plate (18) can only extrude towards one side of the piezoelectric ceramic (13). When the piston rod (11) moves upwards or downwards, the piezoelectric ceramics (13) can be pressed to generate voltage.
The inner electrode plate (4) and the outer electrode plate (5) are respectively embedded on the inner cylinder and the outer cylinder (1, 2) of the damper, the upper part of the damping cavity is provided with an annular floating piston (22), and the air chamber (21) is filled with air to form a compensation air chamber. The liquid communication between the upper cavity and the lower cavity of the damping is realized through the upper and lower circulating holes (6) on the same inner part.
The piezoelectric ceramic (13) is connected with the inner electrode plate (4) and the outer electrode plate (5) through leads (19), an O-shaped sealing ring (20) is adopted between the piston rod (11) and the damping cavity, and the piezoelectric energy supply part and the damping cavity are connected with a nut (8) through a bolt (9).
The working principle of the damper is as follows: when the piston rod (11) is driven by external force to move downwards, the piston rod (11) moves together with the compression spring plate (10), and the upper spring (14) extrudes the piezoelectric ceramic (13) to generate voltage. During return stroke, the piston rod (11) moves upwards under the action of external force or a system, the piston rod (11) moves together with the compression spring plate (10), and the lower spring (12) extrudes the piezoelectric ceramic (13) to generate voltage. The generated voltage is connected to the inner electrode plate (4) and the outer electrode plate (5) through a lead (19). The electrorheological fluid (23) between the inner and outer electrodes is affected by the electric field, the viscosity is increased, and the shear strength is increased. Under the thrust action of the piston (24), the electrorheological fluid (23) flows from the damping cavity to the space between the inner electrode (4) and the outer electrode (5) through the annular damping channel (3) and the circulation hole (6) and then flows back to the damping cavity. As the viscosity of the electrorheological fluid (23) is increased, the shearing strength is increased, and in turn, the resistance generated to the piston (24) is increased, thereby achieving the aim of vibration reduction. The larger the up-and-down movement amplitude of the piston (24) is, the higher the voltage generated by the piezoelectric ceramic (13) is, and the larger the resistance generated by the electrorheological fluid (23) is, thereby achieving the purpose of self-coupling vibration reduction.
Claims (3)
1. A bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper comprises a piezoelectric energy supply part consisting of a piston rod (11), a compression spring plate (10), a lower spring (12), an upper spring (14), piezoelectric ceramic (13), a fixing plate (18) and a lead (19); the damping part consists of an annular damping channel (3), an inner electrode plate (4), an outer electrode plate (5), a circulation hole (6) and electrorheological fluid (23); in addition, the air chamber (21) and the annular floating piston (22) complete the volume compensation of the damping cavity; the packaging of the damper is completed by an inner cylinder (2), an outer cylinder (1), a gasket (7), a hexagon nut (8), a bolt (9), a top cover (15), an O-shaped sealing ring (20) and the like, and the packaging device is characterized in that a piezoelectric energy supply part and a damping cavity part are sequentially connected from top to bottom, symmetrically distributed springs and compression spring plates can enable piezoelectric ceramics to be pressed in two directions to generate voltage, a damping channel is formed between an inner polar plate and an outer polar plate which are fixed on the inner cylinder and the outer cylinder, and an upper circulation hole and a lower circulation hole are formed in the inner cylinder (2) to.
2. A double-acting piezoelectric ceramic and electrorheological fluid self-coupling damper as claimed in claim 1 wherein the springs and compression spring plates are symmetrically disposed about the piezoelectric ceramic (13) so that the piezoelectric ceramic can be always compressed during two strokes to provide the voltage required for electrorheological fluid operation.
3. The bi-directional acting piezoelectric ceramic and electrorheological fluid self-coupling damper as claimed in claim 1, wherein the annular damping channel (3) is provided with flow holes (6) distributed up and down to complete the flow of electrorheological fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543602.7A CN111677807A (en) | 2020-06-15 | 2020-06-15 | Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543602.7A CN111677807A (en) | 2020-06-15 | 2020-06-15 | Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper |
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| Publication Number | Publication Date |
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| CN111677807A true CN111677807A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010543602.7A Pending CN111677807A (en) | 2020-06-15 | 2020-06-15 | Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper |
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| CN (1) | CN111677807A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236703A (en) * | 2021-04-25 | 2021-08-10 | 四川大学 | Electrorheological fluid shock absorber with temperature self-adaptive characteristic |
Citations (7)
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|---|---|---|---|---|
| DE19548467A1 (en) * | 1995-12-22 | 1997-06-26 | Abb Research Ltd | Mechanical oscillation damper for e.g. maintaining accuracy of optical fibre sensors |
| CN1492161A (en) * | 2002-10-21 | 2004-04-28 | 西北工业大学 | Self coupling electric rheological liquid damper without external power |
| CN202251616U (en) * | 2011-09-22 | 2012-05-30 | 烟台航空液压控制公司 | Pulling-type variable throttling hydraulic damper |
| CN205244233U (en) * | 2015-12-17 | 2016-05-18 | 西安科技大学 | From energizing quantity formula vehicle magnetorheological damper device |
| CN110195760A (en) * | 2019-06-14 | 2019-09-03 | 四川大学 | A kind of novel piezo-electric ceramic and ER fluid are from coupling damper |
| CN110544976A (en) * | 2019-09-23 | 2019-12-06 | 重庆大学 | Piezoelectric self-powered combined beam vibration damper and control method thereof |
| CN212536511U (en) * | 2020-06-15 | 2021-02-12 | 四川大学 | Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper |
-
2020
- 2020-06-15 CN CN202010543602.7A patent/CN111677807A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19548467A1 (en) * | 1995-12-22 | 1997-06-26 | Abb Research Ltd | Mechanical oscillation damper for e.g. maintaining accuracy of optical fibre sensors |
| CN1492161A (en) * | 2002-10-21 | 2004-04-28 | 西北工业大学 | Self coupling electric rheological liquid damper without external power |
| CN202251616U (en) * | 2011-09-22 | 2012-05-30 | 烟台航空液压控制公司 | Pulling-type variable throttling hydraulic damper |
| CN205244233U (en) * | 2015-12-17 | 2016-05-18 | 西安科技大学 | From energizing quantity formula vehicle magnetorheological damper device |
| CN110195760A (en) * | 2019-06-14 | 2019-09-03 | 四川大学 | A kind of novel piezo-electric ceramic and ER fluid are from coupling damper |
| CN110544976A (en) * | 2019-09-23 | 2019-12-06 | 重庆大学 | Piezoelectric self-powered combined beam vibration damper and control method thereof |
| CN212536511U (en) * | 2020-06-15 | 2021-02-12 | 四川大学 | Bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper |
Non-Patent Citations (1)
| Title |
|---|
| 刘雄;张方;姜金辉;: "基于直升机ACSR的共振式作动器设计", 国外电子测量技术, no. 09, 15 September 2016 (2016-09-15), pages 55 - 61 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236703A (en) * | 2021-04-25 | 2021-08-10 | 四川大学 | Electrorheological fluid shock absorber with temperature self-adaptive characteristic |
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