阅读说明：本技术 一种抗腐蚀高通量双液阻尼器 (Corrosion-resistant high-flux double-liquid damper ) 是由 张鹏雕 霍立平 朱光夫 张宗林 王占宇 马兆勇 郭晓伟 吴伟昌 竭继明 于 2019-12-02 设计创作，主要内容包括：本发明的一种抗腐蚀高通量双液阻尼器,包括：外套筒和两个对称的阻尼结构；阻尼结构包括：磁流变液筒、剪切增稠液筒和芯柱；剪切增稠液筒和外套筒同轴,磁流变液筒和外套筒的轴线平行；芯柱的大端设于剪切增稠液筒内,小端从外套筒顶部伸出；三个磁流变液筒设于同一平面内,分别位于等边三角形的三个顶点,相邻的磁流变液筒间通过第一连接件连接；剪切增稠液筒的底部通过第二弹簧和第二连接件与三个磁流变液筒的顶部相连接；两个对称设置的阻尼结构通过第一弹簧相连接；其中一个阻尼结构的芯柱从外套筒顶部伸出与外套筒固定；磁流变液筒的内壁设有励磁线圈。该阻尼器减振效果好,可有效耐磨损、抗腐蚀,并可实现自动复原,适应荷载范围较广。(The invention relates to a corrosion-resistant high-flux double-liquid damper, which comprises: the damping structure comprises an outer sleeve and two symmetrical damping structures; the damping structure includes: a magnetorheological fluid cylinder, a shear thickening fluid cylinder and a core column; the shear thickening liquid cylinder and the outer sleeve are coaxial, and the axes of the magnetorheological liquid cylinder and the outer sleeve are parallel; the large end of the core column is arranged in the shear thickening liquid cylinder, and the small end of the core column extends out of the top of the outer sleeve; the three magnetorheological fluid cylinders are arranged in the same plane and are respectively positioned at three vertexes of the equilateral triangle, and the adjacent magnetorheological fluid cylinders are connected through a first connecting piece; the bottom of the shear thickening liquid cylinder is connected with the tops of the three magnetorheological liquid cylinders through a second spring and a second connecting piece; the two symmetrically arranged damping structures are connected through a first spring; the core column of one damping structure extends out of the top of the outer sleeve and is fixed with the outer sleeve; the inner wall of the magnetorheological fluid cylinder is provided with an excitation coil. The damper has good damping effect, can effectively resist abrasion and corrosion, can realize automatic restoration, and has wider application range.)

1. A corrosion resistant high flux two-fluid damper, comprising: the damping structure comprises an outer sleeve and two damping structures which are symmetrically arranged in the outer sleeve; the damping structure includes: three magnetorheological fluid cylinders, a shear thickening fluid cylinder and a core column;

the shear thickening liquid cylinder and the outer sleeve are coaxially arranged, and the axis of the magnetorheological liquid cylinder is parallel to the axis of the outer sleeve; the large end of the core column is arranged in the shear thickening liquid cylinder, and the small end of the core column sequentially penetrates through the shear thickening liquid cylinder and a central hole in the top of the outer sleeve and extends out of the outer sleeve; the three magnetorheological fluid cylinders are arranged in the same plane and are respectively positioned at three vertexes of the equilateral triangle, and the adjacent magnetorheological fluid cylinders are connected through a first connecting piece; the bottom of the shear thickening liquid cylinder is respectively connected with the tops of the three magnetorheological liquid cylinders through a second spring and a second connecting piece in sequence; the two symmetrically arranged damping structures are connected through a first spring, and two ends of the first spring are respectively connected with the bottoms of the corresponding magnetorheological fluid cylinders; the core column of one damping structure of the two symmetrically arranged damping structures extends out of the top of the outer sleeve and is fixedly connected with the outer sleeve; magnetorheological fluid is added into the magnetorheological fluid cylinder, the inner wall of the magnetorheological fluid cylinder is provided with an excitation coil, and shear thickening fluid is added into the shear thickening fluid cylinder.

2. The corrosion-resistant high flux double fluid damper of claim 1, wherein said outer sleeve is a hollow cylinder formed by splicing two half cylinders, and the outer wall of said outer sleeve is made of FRP material.

3. The corrosion-resistant high flux biliquid damper of claim 1, wherein said outer sleeve inner wall is provided with an arcuate slot at a location corresponding to each magnetorheological fluid cylinder, the radius of the arcuate slot being greater than the radius of the magnetorheological fluid cylinder.

4. The corrosion-resistant high flux dual fluid damper of claim 1, wherein said shear thickening fluid cylinder has a bore-shaped thread on its inner wall to increase contact area, said shear thickening fluid cylinder being closed at its bottom and having a central opening at its top for the small end of said stem to extend through.

5. The corrosion-resistant high flux biliquid damper of claim 1, wherein said magnetorheological fluid cylinder has a plurality of hooks arrayed on its inner wall, and said excitation coil is wound around the corresponding hooks to apply a magnetic field to the interior of the damper by external energization.

6. The corrosion-resistant high flux dual fluid damper of claim 1, wherein said outer wall of said stem is a wear-resistant ceramic, and said stem has a cylindrical hole at its small end for easy connection to a vibration source.

7. The corrosion-resistant, high flux dual fluid damper of claim 1, wherein said first and second springs are both rubber springs.

8. The corrosion-resistant high flux biliquid damper of claim 1, wherein the magnetorheological fluid is in a liquid state when the vibration source is non-vibrating or has a relatively small amplitude; when vibration with large amplitude and low frequency occurs, the magnetic field is applied to the exciting coil by electrifying, so that the magnetorheological fluid is instantly changed from a liquid state to a semi-solid state, and the vibration amplitude is reduced.

9. The corrosion-resistant high flux dual fluid damper of claim 1 wherein the shear thickening fluid is in a liquid state when the vibration source is non-vibrating or has a low frequency of vibration; when the vibration frequency is too high, the movement speed of the core column is accelerated, the shear thickening liquid on one side of the core column is forced to flow in the shear thickening liquid cylinder, and the viscous resistance generated between the shear thickening liquid and the gun bore linear threads on the inner wall of the shear thickening liquid cylinder provides output damping force for the damper.

Technical Field

The invention belongs to the technical field of engineering structure vibration control, and relates to an anti-corrosion high-flux double-liquid damper.

Background

The impact and the vibration are relatively common natural phenomena and are widely applied to industrial production and mechanical equipment. Energy absorption and dissipation of shock and vibration is important to avoid the interference and damage caused by the shock and vibration. The magneto-rheological liquid is an intelligent material with excellent performance, when the magneto-rheological liquid receives the action of a magnetic field, magnetic particles in the magneto-rheological liquid are arranged into a chain along the direction of the magnetic field to form a Bingham solid plastic body, the apparent viscosity is increased, once the magnetic field is removed, the fluid returns to the original Newtonian fluid state with good fluidity, the response time is only a few milliseconds, and the change characteristic of continuous, reversible, rapid and easy control of the viscosity enables the magneto-rheological liquid to be developed and applied in almost all industrial and engineering fields. The magnetorheological fluid damper has been invented in China before. However, the damping force and initial stiffness provided by a single magnetorheological fluid damper are relatively limited, and the magnetorheological fluid damper still has a response time problem under the action of a rapid impact load. Compared with magnetorheological fluid, the shear thickening fluid is also an intelligent material with excellent performance, the difference is that the characteristic of the shear thickening fluid depends on the shear strain rate, when the shear thickening fluid bears high strain rate load, the apparent viscosity of a contact interface is changed greatly, even the shear thickening fluid is changed from a liquid phase to a solid phase, namely, shear thickening behavior occurs, and at the moment, the shear modulus of the shear thickening fluid is far larger than the initial shear modulus of the shear thickening fluid. Importantly, when the load is removed, the shear thickening fluid can be instantaneously changed from the solid phase to the liquid phase, i.e., the change is reversible. The shear thickening fluid damper protects the main structure against impact load response by utilizing the shear thickening characteristic of the shear thickening fluid, but the damping force and the rigidity of the shear thickening fluid damper are not ideal in control effect because the shear thickening fluid does not generate shear thickening action under low-speed vibration. In addition, most dampers subjected to strong vibration have damages of different degrees, and a great deal of energy and financial resources are consumed because the dampers cannot be recovered due to the damages or because the dampers are complex to install and disassemble.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide the corrosion-resistant high-flux double-liquid damper which has an obvious vibration reduction effect, can effectively resist wear and corrosion, can realize automatic restoration and has a wider load application range.

The invention provides a corrosion-resistant high-flux double-liquid damper, which comprises: the damping structure comprises an outer sleeve and two damping structures which are symmetrically arranged in the outer sleeve; the damping structure includes: three magnetorheological fluid cylinders, a shear thickening fluid cylinder and a core column;

the shear thickening liquid cylinder and the outer sleeve are coaxially arranged, and the axis of the magnetorheological liquid cylinder is parallel to the axis of the outer sleeve; the large end of the core column is arranged in the shear thickening liquid cylinder, and the small end of the core column sequentially penetrates through the shear thickening liquid cylinder and a central hole in the top of the outer sleeve and extends out of the outer sleeve; the three magnetorheological fluid cylinders are arranged in the same plane and are respectively positioned at three vertexes of the equilateral triangle, and the adjacent magnetorheological fluid cylinders are connected through a first connecting piece; the bottom of the shear thickening liquid cylinder is respectively connected with the tops of the three magnetorheological liquid cylinders through a second spring and a second connecting piece in sequence; the two symmetrically arranged damping structures are connected through a first spring, and two ends of the first spring are respectively connected with the bottoms of the corresponding magnetorheological fluid cylinders; the core column of one damping structure of the two symmetrically arranged damping structures extends out of the top of the outer sleeve and is fixedly connected with the outer sleeve; magnetorheological fluid is added into the magnetorheological fluid cylinder, the inner wall of the magnetorheological fluid cylinder is provided with an excitation coil, and shear thickening fluid is added into the shear thickening fluid cylinder.

In the corrosion-resistant high-flux double-liquid damper, the outer sleeve is a hollow cylinder formed by splicing two semi-cylinders, and the outer wall of the outer sleeve is made of FRP (fiber reinforced plastic) material.

In the corrosion-resistant high-flux double-liquid damper, the inner wall of the outer sleeve is provided with an arc-shaped groove at a position corresponding to each magnetorheological liquid cylinder, and the radius of the arc-shaped groove is larger than that of the magnetorheological liquid cylinder.

In the corrosion-resistant high-flux double-liquid damper, the inner wall of the shear thickening liquid cylinder is provided with gun chamber linear threads to increase the contact area, the bottom of the shear thickening liquid cylinder is closed, and the top of the shear thickening liquid cylinder is provided with a central hole for the small end of the core column to extend out.

In the corrosion-resistant high-flux double-liquid damper, a plurality of hooks are arranged on the inner wall of the magnetorheological fluid cylinder in an array mode, the excitation coil is wound on the corresponding hooks, and a magnetic field can be applied to the interior of the damper through external electrification.

In the corrosion-resistant high-flux double-liquid damper, the outer wall of the core column is made of wear-resistant ceramic, and the small end of the core column is provided with a cylindrical hole which is convenient to connect with a vibration source.

In the corrosion-resistant high flux dual fluid damper of the present invention, the first spring and the second spring are both rubber springs.

In the corrosion-resistant high-flux double-liquid damper, when the vibration source does not vibrate or the amplitude is small, the magnetorheological liquid is in a liquid state; when vibration with large amplitude and low frequency occurs, the magnetic field is applied to the exciting coil by electrifying, so that the magnetorheological fluid is instantly changed from a liquid state to a semi-solid state, and the vibration amplitude is reduced.

In the corrosion-resistant high-flux double-liquid damper, when the vibration source does not vibrate or the vibration frequency is lower, the shear thickening liquid is in a liquid state; when the vibration frequency is too high, the movement speed of the core column is accelerated, the shear thickening liquid on one side of the core column is forced to flow in the shear thickening liquid cylinder, and the viscous resistance generated between the shear thickening liquid and the gun bore linear threads on the inner wall of the shear thickening liquid cylinder provides output damping force for the damper.

The corrosion-resistant high-flux double-liquid damper is nested, and comprises an inner structure and an outer sleeve, wherein the inner structure is vertically symmetrical, magnetorheological liquid is added into a magnetorheological liquid cylinder, and shear thickening liquid is added into a shear thickening liquid cylinder. The inner wall of the shear thickening liquid cylinder is provided with gun bore linear threads, so that the contact area of the inner wall and the shear thickening liquid can be increased; the inner wall of the magnetorheological fluid cylinder is provided with an excitation coil. The magnetorheological fluid can enable the magnetic particles in the magnetorheological fluid to be arranged into a chain shape along the direction of the magnetic field through an external magnetic field, the apparent viscosity is increased, once the magnetic field is removed, the fluid returns to the original Newtonian fluid state with good fluidity, and the process is extremely fast and reversible. The shear thickening liquid can be solidified under the high-speed impact, the viscosity is sharply increased, and the shear thickening liquid can be restored to be liquid after the external load is removed. When the amplitude is large and the vibration frequency is small, the damping is mainly carried out by the magnetorheological fluid, and when the amplitude is small and the vibration frequency is large, the damping is effectively carried out by the shear thickening fluid. The two can cooperate, have fine shock attenuation effect. The outer wall of the outer sleeve is made of FRP material, and the outer sleeve has the advantages of high strength, corrosion resistance, light weight and the like. In addition, the rubber spring in the structure can also play a role in vibration reduction to a certain extent, and the damper can automatically reset by means of the elasticity of the rubber spring. The damper can be applied to the aspects of shock absorbers, brake devices, aerospace and the like.

Drawings

FIG. 1 is a perspective view of a corrosion resistant high flux dual fluid damper of the present invention;

FIG. 2 is an internal schematic view of a corrosion resistant high flux dual fluid damper of the present invention;

FIG. 3 is a top view of a corrosion resistant high flux dual fluid damper of the present invention;

FIG. 4 is a perspective view of a shear thickening fluid cartridge of the present invention;

FIG. 5 is a perspective view of a magnetorheological fluid cartridge in accordance with the present invention.

Detailed Description

As shown in fig. 1 to 5, a corrosion-resistant high flux two-fluid damper of the present invention comprises: an outer sleeve 2 and two damping structures symmetrically arranged inside the outer sleeve 2. The damping structures which are symmetrical up and down are connected through the spring, so that the damping structure can better resist and resist vibration. The damping structure includes: three magnetorheological fluid cylinders 5, a shear thickening fluid cylinder 3 and a core column 1.

As shown in FIG. 2, the shear thickening fluid cylinder 3 and the outer sleeve 2 are coaxially arranged, and the axis of the magnetorheological fluid cylinder 5 is parallel to the axis of the outer sleeve 2. The big end of the core column 1 is arranged in the shear thickening liquid cylinder 3, and the small end of the core column sequentially penetrates through the shear thickening liquid cylinder 3 and the center hole in the top of the outer sleeve 2 and extends out of the outer sleeve 2. The three magnetorheological fluid cylinders 5 are arranged in the same plane and are respectively positioned at three vertexes of the equilateral triangle, and the adjacent magnetorheological fluid cylinders 5 are connected through a first connecting piece 8. The bottom of the shear thickening liquid cylinder 3 is respectively connected with the tops of the three magnetorheological liquid cylinders 5 through a second spring 7 and a second connecting piece 4 in sequence. The two symmetrically arranged damping structures are connected through a first spring 6, and two ends of the first spring 6 are respectively connected with the bottoms of the corresponding magnetorheological fluid cylinders 5. The stem 1 of one of the two symmetrically arranged damping structures extends out of the top of the outer sleeve 2 and is fixedly connected with the outer sleeve 2. Magnetorheological fluid is filled in the magnetorheological fluid cylinder 5, an excitation coil is arranged on the inner wall of the magnetorheological fluid cylinder 5, and shear thickening fluid is added in the shear thickening fluid cylinder 3.

The outer sleeve 2 is a hollow cylinder formed by splicing two semi-cylinders, so that the installation and the disassembly are convenient. The upper end surface and the lower end surface of the outer sleeve 2 are both provided with central holes for the core column 1 to pass through. The outer wall of the outer sleeve 2 is made of FRP material, and has the advantages of high strength, corrosion resistance, light weight and the like. The inner wall of the outer sleeve 2 is provided with an arc-shaped groove 21 corresponding to the position of each magnetorheological fluid cylinder 5, the radius of the arc-shaped groove 21 is larger than that of the magnetorheological fluid cylinder 5, and the left-right swing of the inner structure is avoided.

As shown in fig. 4, the shear thickening fluid cylinder 3 is a hollow cylinder, the inner wall of the cylinder is provided with a gun bore linear thread 31 to increase the contact area, the bottom of the shear thickening fluid cylinder 3 is closed, and the top of the cylinder is provided with a central hole for the small end of the core column 1 to extend out. The shear thickening fluid cylinder 3 is filled with shear thickening fluid which is in a liquid state when the vibration source does not vibrate or the vibration frequency is lower; when the vibration frequency is too high, the movement speed of the core column is accelerated, the shear thickening liquid on one side of the core column is forced to flow in the shear thickening liquid cylinder, and the viscous resistance generated between the shear thickening liquid and the gun bore linear threads on the inner wall of the shear thickening liquid cylinder provides output damping force for the damper.

As shown in fig. 5, a plurality of hooks 51 are arranged on the inner wall of the magnetorheological fluid cylinder 5 in an array, the excitation coil is wound on the corresponding hook 51, and a magnetic field can be applied to the inside of the damper by external energization. The three magnetorheological fluid cylinders 5 on the same plane are connected with each other through the first connecting piece 8 to form an equilateral triangle, so that the structure is more stable, and overlarge bending and twisting are avoided. The magnetorheological fluid is filled in the magnetorheological fluid cylinder 5, and is in a liquid state when the vibration source does not vibrate or the amplitude is small; when vibration with large amplitude and low frequency occurs, the magnetic field is applied to the exciting coil by electrifying, so that the magnetorheological fluid is instantly changed from a liquid state to a semi-solid state, and the vibration amplitude is reduced.