CN112360914A - Fluid-solid coupling inertial container - Google Patents
Fluid-solid coupling inertial container Download PDFInfo
- Publication number
- CN112360914A CN112360914A CN202011138329.6A CN202011138329A CN112360914A CN 112360914 A CN112360914 A CN 112360914A CN 202011138329 A CN202011138329 A CN 202011138329A CN 112360914 A CN112360914 A CN 112360914A
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- Prior art keywords
- fluid
- cylinder body
- inerter
- solid
- piston
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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
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/20—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with the piston-rod extending through both ends of the cylinder, e.g. constant-volume 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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/22—Compensation of inertia forces
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/08—Inertia
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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
- F16F2230/00—Purpose; Design features
- F16F2230/06—Fluid filling or discharging
Abstract
The invention relates to a fluid-solid coupling inerter, which comprises a cylinder body (1), a piston (7) movably positioned in the cylinder body (1) and dividing the interior of the cylinder body (1) into two chambers, and a spiral pipeline (3) wound on the outer side wall of the cylinder body (1) along the circumferential direction, wherein the spiral pipeline (3) is communicated with the cylinder body (1), the cylinder body (1) and the spiral pipeline (3) are both filled with fluid (4), and the fluid (4) contains solid particles (5). Compared with the prior art, the invention has simple structure, can further enhance the apparent mass (inertia capacity coefficient) synergy of the inertia capacity device, and simultaneously has the energy consumption synergy function.
Description
Technical Field
The invention relates to the technical field of vibration control, in particular to a fluid-solid coupling inertial container.
Background
The inerter is a two-end point inerter, has application potential in the aspect of vibration control, and the inerter control technology for performing vibration control by using the inerter is expected to become a new generation mainstream scheme for improving the performance of structures or equipment. Unlike a traditional single-end-point mass element, the output of the inerter element is related to the relative acceleration of two end points, and the ratio of the output to the relative acceleration of the two end points is the apparent mass of the inerter element, which is also called the inerter coefficient. The inertance coefficient generated by the inertance can be far larger than the physical mass of the inertance, and the characteristic is called the apparent mass synergistic property of the inertance. The two-end inertial characteristics of an inertial volume element are generally achieved by changing the motion mode of a device part, particularly most commonly by translation-rotation conversion, and most commonly utilize a mechanical transmission device for changing the motion mode in mechanical engineering, so that the inertial volume is called a mechanical inertial volume. However, the mechanical inertial container is complicated in structure and inconvenient in practical application. Different from a mechanical inertial container, a hydraulic inertial container (fluid inertial container) for realizing the inertial container characteristic by changing the flow speed is simple in structure and convenient to realize, but the current fluid inertial container generally has the defect of insufficient inertial container coefficient, cannot fully embody the apparent mass synergistic advantage of the inertial container, and cannot meet the requirement of practical application.
Disclosure of Invention
The invention aims to provide a fluid-solid coupling inerter which is simple in structure, can further enhance the apparent mass (namely the inerter coefficient) synergistic effect of an inerter device, and has the energy consumption synergistic effect.
The purpose of the invention is realized by the following technical scheme:
the fluid-solid coupling inerter comprises a cylinder body, a piston movably located inside the cylinder body and dividing the inside of the cylinder body into two chambers, and a spiral pipeline wound on the outer side wall of the cylinder body along the circumferential direction, wherein two ends of the spiral pipeline are respectively communicated with the two chambers of the cylinder body, fluid is filled in the cylinder body and the spiral pipeline, and the fluid contains solid particles. The axis of the inerter is parallel to the horizontal direction, and the piston is movably and vertically arranged in the cylinder body to divide the interior of the cylinder body into a left chamber and a right chamber.
And a pipeline port communicated with the spiral pipeline is arranged on the side wall of the chamber. The pipeline ports are all located at the end part of the cylinder body.
And a buffer spring is arranged on the inner wall of the cavity and is far away from the pipeline port. Avoid the piston can touch buffer spring at the removal in-process, buffer spring all is located the cylinder body along the lateral wall of vertical direction, and buffer spring can adopt the welding to be connected with the cylinder body lateral wall.
And a switch control valve is arranged at the pipeline opening. The switch control valve can adopt an electromagnetic valve, a hydraulic valve and the like, and when the inertial container does not work, the movement of the fluid between the chamber and the spiral pipeline is stopped not only by stopping the movement of the piston but also by closing the switch control valve.
Piston rods are vertically arranged on two sides of the piston and movably penetrate through the cylinder body along the axial direction. The piston rod is connected with an external power mechanism, and the piston is axially moved through the piston rod.
The material of the spiral pipeline is selected from one or more of copper, aluminum or special plastics.
The fluid is selected from one or more of oil, silicon oil or silica gel, the coefficient of inertia is related to the density of the fluid, and the coefficient of inertia is increased when the density of the fluid is increased.
The solid particles are made of one or more materials selected from steel, copper or organic plastics, the materials can move along with the fluid when in the fluid, the speed can be consistent, the content of the solid particles is related to the coefficient of inertia, the content of the solid particles is increased, the coefficient of inertia is also increased, when the content of the solid particles is fixed, the density of the solid particles is increased, the required number of the solid particles is reduced, and the using amount of the solid particles can be reduced.
The volume content of solid particles in the fluid is 1-60%.
The cross-sectional area of the piston is 5-100 times that of the spiral pipeline, and the piston divides the cylinder body into two chambers, so that when the piston is placed as shown in figure 1, the cross-sectional area of the piston is equal to that of the cylinder body.
The pitch of the helical pipe is equal to the outer diameter of the helical pipe.
When the invention works (neglecting the secondary factors of the volume of the piston and the piston rod, the mass of the piston and the piston rod, smaller sliding friction and the like), the spiral pipeline is filled with fluid, and the sectional area of the cylinder body (or the working cross sectional area of the piston) is A1The cross-sectional area of the spiral pipe is A2The length of the spiral pipeline is l, the density of the fluid is rho, and the density of the solid particles is rhosThe volume content is lambda. The velocities at both ends of the piston are respectively
(Default)
Is greater than
And the velocities of the fluid and the solid particles in the cylinder body positioned on the same side of the piston are equal), the coefficient of inertia volume is minAssuming that the moving speeds of the fluid and the solid particles in the spiral pipeline are equal and the average flow speed is v, the flow rate is equal
The volume V of the fluid in the helical conduit1Is composed of
V＝A2l (2) wherein the volume V of the solid particlessAnd volume V of fluidlAnd are respectively
The energy E of the fluid in the spiral ductlIs composed of
Total mass M and energy E of solid particles in a helical pipesAre respectively as
M＝ρsλA2l (5)
The ideal fluid-solid coupling inerter energy storage should be
This value should be equal to the total energy of the fluid and solid particles in the spiral duct, i.e.
E＝El+Es (8)
The formula (8) is replaced by the formula (1), (4), (6) and (7), and the inertia volume coefficient of the fluid-solid coupling inertia container is obtained
The invention uses fluid and solid particles to fill together, and the solid particles increase the inertia of the inerter and play part of energy consumption role while realizing the inerter characteristic by changing the flow rate (the flow rate of the fluid in the cylinder body is changed after the fluid enters the spiral pipeline). Through the fluid-solid coupling mode, the inertial container can increase the apparent mass synergistic effect of the inertial container device and can consume energy at the same time. The inertia container belongs to two end point inertia elements, can be used independently during implementation, and can also be used in combination with a spring element and a damping element to be installed on each part of the structure, the formed inertia container damping system has the characteristics of light weight, miniaturization, assembly, high energy consumption, high efficiency and the like, the dynamic response of the structure can be effectively reduced under the dynamic action of earthquake, wind, environmental vibration and the like, the safety of the structure and the comfort of personnel are guaranteed, and the development target and the environmental target of safety, green and high efficiency are met. In addition, the inerter can also be applied to other fields with vibration control requirements, and has a strong engineering value.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a fluid-solid coupled inerter.
In the figure: 1-a cylinder body; 2-a piston rod; 3-a spiral pipe; 4-a fluid; 5-solid particles; 6-pipeline port; 7-a piston; 8-buffer spring.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, the fluid-solid coupled inerter comprises a cylinder body 1, a piston 7 which is movably located in the cylinder body 1 along an axial direction and divides the inside of the cylinder body 1 into two chambers, and a spiral pipeline 3 which is wound on the outer side wall of the cylinder body 1 along a circumferential direction, wherein piston rods 2 are vertically arranged on both sides of the piston 7, the piston rods 2 movably penetrate through the cylinder body 1 along the axial direction, a pipeline port 6 which is communicated with the end portion of the spiral pipeline 3 is arranged on the side wall of each of the two chambers, a switch control valve (omitted in the figure) can be arranged at the pipeline port 6, a buffer spring 8 is arranged on the inner wall of each chamber, the buffer spring 8 is arranged away from the pipeline port 6 and is located on the side wall of the cylinder body 1 in the vertical direction, a fluid 4 is filled in the cylinder body 1 and the spiral pipeline 3 (. Wherein, the material of the spiral pipeline 3 is selected from one or more of copper, aluminum or special plastic, the fluid 4 is selected from one or more of oil, silicon oil or silica gel, the material of the solid particle 5 is selected from one or more of steel, copper or organic plastic, the volume content of the solid particle 5 in the fluid 4 is 1% -60%, the cross-sectional area of the piston 7 is 5-100 times of the cross-sectional area of the spiral pipeline 3, in the embodiment, two pipeline ports 6 are both positioned at two ends of the cylinder body 1, and the screw pitch of the spiral pipeline 3 is equal to the outer diameter of the spiral pipeline 3.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The fluid-solid coupling inerter is characterized by comprising a cylinder body (1), a piston (7) which is movably arranged in the cylinder body (1) and divides the interior of the cylinder body (1) into two chambers, and a spiral pipeline (3) which is wound on the outer side wall of the cylinder body (1) along the circumferential direction, wherein two ends of the spiral pipeline (3) are respectively communicated with the two chambers of the cylinder body (1), the cylinder body (1) and the spiral pipeline (3) are filled with a fluid (4), and the fluid (4) contains solid particles (5).
2. The coupling inerter according to claim 1, wherein a pipe port (6) communicating with the spiral pipe (3) is provided on a sidewall of the chamber.
3. The fluid-solid coupled inerter according to claim 2, wherein a buffer spring (8) is arranged on the inner wall of the chamber, and the buffer spring (8) is arranged away from the pipeline port (6).
4. The fluidly-solid coupled inerter according to claim 2, wherein an on-off control valve is arranged at the pipeline port (6).
5. The fluid-solid coupled inerter according to claim 1, wherein a piston rod (2) is vertically arranged on each side of the piston (7), and the piston rod (2) axially movably penetrates through the cylinder (1).
6. The coupling inerter according to claim 1, wherein the spiral pipe (3) is made of one or more materials selected from copper, aluminum, and special plastics.
7. The inerter-solid coupling vessel according to claim 1, wherein the fluid (4) is selected from one or more of oil, silicone oil, and silica gel.
8. The coupling inerter according to claim 1, wherein the solid particles (5) are made of one or more materials selected from steel, copper, and organic plastic.
9. The inerter-solid coupling vessel according to claim 1, wherein the solid particles (5) are contained in the fluid (4) in an amount of 1-60% by volume.
10. The inerter-spring-solid coupling vessel according to claim 1, wherein the cross-sectional area of the piston (7) is 5-100 times the cross-sectional area of the spiral pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138329.6A CN112360914A (en) | 2020-10-22 | 2020-10-22 | Fluid-solid coupling inertial container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138329.6A CN112360914A (en) | 2020-10-22 | 2020-10-22 | Fluid-solid coupling inertial container |
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| CN112360914A true CN112360914A (en) | 2021-02-12 |
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| CN202011138329.6A Pending CN112360914A (en) | 2020-10-22 | 2020-10-22 | Fluid-solid coupling inertial container |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033828A (en) * | 2021-11-15 | 2022-02-11 | 广州大学 | Novel hydraulic inertia capacity shock absorption device |
| CN114961010A (en) * | 2022-05-25 | 2022-08-30 | 西安工程大学 | Inertial capacity self-resetting shock insulation and absorption system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033828A (en) * | 2021-11-15 | 2022-02-11 | 广州大学 | Novel hydraulic inertia capacity shock absorption device |
| CN114961010A (en) * | 2022-05-25 | 2022-08-30 | 西安工程大学 | Inertial capacity self-resetting shock insulation and absorption system |
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