CN109083974B - Intelligent frequency modulation shock-proof device for liquid storage tank - Google Patents
Intelligent frequency modulation shock-proof device for liquid storage tank Download PDFInfo
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- CN109083974B CN109083974B CN201811311244.6A CN201811311244A CN109083974B CN 109083974 B CN109083974 B CN 109083974B CN 201811311244 A CN201811311244 A CN 201811311244A CN 109083974 B CN109083974 B CN 109083974B
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements
- F16F15/0275—Control of stiffness
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
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- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses an intelligent frequency-modulation shockproof device for a liquid storage tank. The vibration isolation device comprises an elastic layer and a rubber pad, the rubber pad is arranged on the elastic layer, and the liquid storage tank is arranged on the rubber pad. And a hemispherical tuned liquid damper is arranged below the elastic layer, high-viscosity liquid is filled in the hemispherical tuned liquid damper, and a pressure sensor is arranged in the hemispherical tuned liquid damper. The high-viscosity liquid storage tank is communicated with the hemispherical tuned liquid damper through a liquid conveying pipeline, and the high-viscosity liquid storage tank is provided with a liquid suction pump. The intelligent reaction device comprises a terminal computer, and the terminal computer is connected with a pressure sensor, a valve, a liquid suction pump and an acceleration sensor. The vibration frequency of the high-viscosity liquid damper is adjusted by adjusting the volume of the high-viscosity liquid, so that the liquid friction of the semicircular tuned liquid damper can perform negative work to achieve the vibration absorption effect.
Description
Technical Field
The invention relates to a hybrid anti-vibration technology in the field of vibration control, in particular to an intelligent frequency modulation anti-vibration device for a liquid storage tank.
Background
Petroleum is used as strategic reserve energy, and reserve quantity and occupation quantity of the petroleum are related to the national economic development and the normal proceeding of national life. The industrial role of petroleum is becoming more and more evident as the scientific level increases. In order to keep oil in abundant strategic reserves to meet acute demands under various emergency conditions and to solve the problems of the relevant important industries in development, the safety of oil reserve facilities is of great importance in the process of oil reserve.
The most mainstream liquid storage tanks at present are underground liquid storage tanks, offshore liquid storage tanks and overground liquid storage tanks. No matter which liquid storage mode is adopted, the storage of petroleum is troublesome in coastal areas and areas with frequent earthquakes. The region has the vibration forms of sea wave beating, seismic wave and the like, and large hydrodynamic pressure and pulse pressure are generated due to liquid sloshing, so that the tank body is vibrated, the vibration of the tank body is aggravated again, the buckling deformation (such as foot type bulging) of the liquid storage tank is caused by continuous reciprocation, the tank body is subjected to large fatigue damage, and the problems of fire, pollution and the like are caused by leakage of flammable liquid such as petroleum and the like. The widespread use of anti-roll tanks on ships and shock-absorbing tanks on high-rise buildings has verified the excellent effect of liquid dissipation by internal friction of the liquid flow. However, against these applications, there is only an optimal damping effect at a certain primary frequency. The vibration reduction method is difficult to achieve vibration reduction under various frequencies for protecting the liquid storage tank. In order to keep the liquid storage tank with good vibration damping effect under various vibration modes transmitted from the outside and avoid yield failure of the liquid storage tank, a vibration-proof device capable of carrying out frequency modulation according to the external vibration is needed to solve the problems.
Disclosure of Invention
The invention aims to solve the problems and provides an intelligent frequency-modulation vibration-proof device for a liquid storage tank, which can reduce the vibration degree of liquid in the liquid storage tank and protect the liquid storage tank by using vibration isolation of a vibration-proof device and using the viscosity of the liquid to consume the energy generated by vibration.
The technical problem to be solved by the invention is realized by the following technical scheme:
an intelligent frequency-modulation shockproof device for a liquid storage tank comprises a liquid storage tank (1), a vibration isolation device, a high-viscosity liquid storage tank (7) and an intelligent reaction device;
the vibration isolation device comprises an elastic layer and a rubber pad (2), the elastic layer is arranged on the ground, a plurality of spring dampers (5) are arranged in the elastic layer, the rubber pad (2) is arranged on the elastic layer, the liquid storage tank (1) is arranged on the rubber pad (2), a hemispherical tuned liquid damper (6) is arranged under the ground where the elastic layer is located, the hemispherical tuned liquid damper (6) is fixedly connected with the elastic layer, the inner concave surface of the hemispherical tuned liquid damper (6) faces upwards, high-viscosity liquid is filled in the hemispherical tuned liquid damper (6), and a pressure sensor (11) is arranged in the hemispherical tuned liquid damper (6);
the high-viscosity liquid storage tank (7) is communicated with the hemispherical tuned liquid damper (6) through a liquid conveying pipeline (4), a valve (3) is arranged on the liquid conveying pipeline (4), a liquid suction pump and a liquid discharge pump which are communicated with the liquid conveying pipeline (4) are arranged on the high-viscosity liquid storage tank (7), the liquid suction pump sucks high-viscosity liquid from the hemispherical tuned liquid damper (6) through the liquid conveying pipeline (4), and the liquid discharge pump infuses the high-viscosity liquid into the hemispherical tuned liquid damper (6) through the liquid conveying pipeline (4);
the intelligent reaction device comprises a terminal computer (8), wherein the terminal computer (8) is connected with a pressure sensor (11) and used for receiving liquid pressure information in the hemispherical tuned liquid damper (6), the terminal computer (8) is further connected with a valve (3), a liquid suction pump and a liquid discharge pump, the terminal computer (8) is further connected with an acceleration sensor (9) and used for receiving ground vibration information, and the acceleration sensor (9) is arranged under the ground;
the terminal computer (8) calculates the actual liquid height in the hemispherical tuned liquid damper (6) according to the shape information and the liquid pressure information of the hemispherical tuned liquid damper (6), the terminal computer (8) calculates the adaptive liquid height adaptive to the earthquake main frequency in combination with the earthquake main frequency, the terminal computer (8) compares the actual liquid height with the adaptive liquid height, and controls the liquid suction pump, the liquid discharge pump and the valve (3) to enable the actual liquid height in the hemispherical tuned liquid damper (6) to reach the adaptive liquid height.
Furthermore, the central shaft of the liquid storage tank (1) and the central shaft of the rubber pad (2) are on the same vertical line.
Furthermore, the central axis of the hemispherical tuned liquid damper (6) and the central axis of the rubber pad (2) are on the same vertical line.
Furthermore, a shell (12) is covered on the outer wall of the hemispherical tuned liquid damper (6).
Furthermore, a partition plate (10) is arranged on the bottom wall inside the liquid storage tank (1), and the partition plate (10) is perpendicular to the bottom wall of the liquid storage tank (1).
Further, the force bearing direction of the spring damper (5) is vertical to the horizontal plane.
The invention has the beneficial effects that:
(1) the invention has the characteristic of viscosity when liquid flows, and energy generated by structural vibration is reduced through the friction energy dissipation of the liquid flow.
(2) The vibration frequency of the whole structure of the invention can be changed by changing the volume of the high-viscosity liquid in the hemispherical tuned liquid damper, so that the high-viscosity liquid resonates and the optimal energy dissipation effect is achieved.
(3) The invention utilizes the characteristic of self mass distribution, and resists the action of moment when the structure vibrates, so that the liquid storage tank is easy to restore to the original stable state.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic top view of the apparatus of the present invention;
FIG. 3 is a schematic view showing the installation of the high viscosity liquid storage tank and the transfusion tube in the present invention.
Description of reference numerals:
1-liquid storage tank, 2-rubber pad, 3-valve, 4-transfusion pipeline, 5-spring damper, 6-hemispherical tuned liquid damper, 7-high viscosity liquid storage tank, 8-terminal computer, 9-acceleration sensor, 10-partition board, 11-pressure sensor and 12-shell.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
As shown in fig. 1 to 3, an intelligent frequency modulation vibration-proof device for a liquid storage tank comprises a liquid storage tank 1, a vibration-proof device, a high viscosity liquid storage tank 7 and an intelligent reaction device.
The vibration isolation device comprises an elastic layer and a rubber pad 2, the elastic layer is arranged on the ground, a plurality of spring dampers 5 are arranged in the elastic layer, and the stress directions of the spring dampers 5 are perpendicular to the ground. Rubber pad 2 sets up on the elastic layer, and liquid storage pot 1 is installed at rubber pad 2, installs baffle 10 on the diapire in liquid storage pot 1 inside, and baffle 10 perpendicular to liquid storage pot 1's diapire, baffle 10 can reduce the interior cabin vibrations of liquid storage pot 1. The underground of the elastic layer is provided with a hemispherical tuned liquid damper 6, the hemispherical tuned liquid damper 6 is fixedly connected with the elastic layer, and the outer wall of the hemispherical tuned liquid damper 6 is covered with a shell 12. The center of gravity of the whole underground structure is positioned in the semicircular tuned liquid damper 6, so that the resisting moment is kept when the whole structure vibrates, the whole structure is not easy to overturn and is easy to recover to a stable state. The inner concave surface of the hemispherical tuned liquid damper 6 faces upwards, and the hemispherical tuned liquid damper 6 is filled with high-viscosity liquid, so that the energy of vibration of the liquid storage tank 1 can be consumed through friction generated by the flow of the high-viscosity liquid inside. The hemispherical tuned liquid damper 6 is also provided with a pressure sensor 11, and the pressure sensor 11 is used for monitoring liquid pressure information of high-viscosity liquid in the hemispherical tuned liquid damper 6. The central axis of the liquid storage tank 1 and the central axis of the rubber pad 2 are on the same vertical line, and the central axis of the hemispherical tuned liquid damper 6 and the central axis of the rubber pad 2 are on the same vertical line.
The high-viscosity liquid storage tank 7 is communicated with the hemispherical tuned liquid damper 6 through the infusion pipeline 4, the valve 3 is arranged on the infusion pipeline 4, the high-viscosity liquid storage tank 7 is provided with a liquid suction pump and a liquid discharge pump which are communicated with the infusion pipeline 4, the liquid suction pump sucks the high-viscosity liquid from the hemispherical tuned liquid damper 6 through the infusion pipeline 4, and the liquid discharge pump infuses the high-viscosity liquid into the hemispherical tuned liquid damper 6 through the infusion pipeline 4.
The intelligent reaction device comprises a terminal computer 8, wherein the terminal computer 8 is connected with a pressure sensor 11 and used for receiving the liquid pressure information in the hemispherical tuned liquid damper 6. The terminal computer 8 is connected with the valve 3, the liquid suction pump and the liquid discharge pump, the terminal computer 8 is further connected with an acceleration sensor 9 for receiving earthquake main frequency, and the acceleration sensor 9 is arranged under the ground.
When the liquid level sensor works, the pressure sensor 11 transmits liquid pressure information to the terminal computer 8, and the terminal computer 8 calculates to obtain the actual liquid level in the hemispherical tuned liquid damper 6 by utilizing the liquid pressure information and combining the shape information of the hemispherical tuned liquid damper 6, namely the shape function of the shell. And on the other hand, the acceleration sensor 9 senses the earthquake main frequency and transmits the earthquake main frequency to the terminal computer 8. Before the structure is used, the adaptive liquid height adaptive to the seismic main frequency is calculated according to the seismic main frequency obtained by the acceleration sensor 9 and combined with the formula (1) and the formula (2). The terminal computer 8 compares the actual liquid height with the adaptive liquid height, and when the actual liquid height is lower than the adaptive liquid height, the terminal computer 8 controls to open the valve 3 and the liquid discharge pump, and infuse high-viscosity liquid into the semi-circular liquid tuned damper 6 until the actual liquid height is equal to the adaptive liquid height; when the actual liquid height is higher than the adaptive liquid height, the terminal computer 8 controls to open the valve 3 and the liquid suction pump, and high-viscosity liquid is sucked from the semicircular liquid tuned damper 6 until the actual liquid height is equal to the adaptive liquid height, so that the structure of the invention achieves the effect of adapting to the earthquake main frequency. The vibration isolation effect of the rubber pad 2 and the spring damper 5 and the vibration absorption effect of the semicircular liquid tuned damper 6 are combined, so that the oscillation amplitude of liquid in the liquid storage tank 1 is reduced as much as possible.
For the input-output relationship of a highly viscous liquid, the frequency can be calculated according to the calculation formula obtained by Rattayya (1965):
wherein:
f1is the natural frequency, h is the adaptive liquid depth, R is the curvature radius of the hemispherical liquid tuned damper, lambda1Is the eigenvalue.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides an intelligent frequency modulation anti-vibration device for liquid storage pot which characterized in that: comprises a liquid storage tank (1), a vibration isolation device, a high-viscosity liquid storage tank (7) and an intelligent reaction device;
the vibration isolation device comprises an elastic layer and a rubber pad (2), the elastic layer is arranged on the ground, a plurality of spring dampers (5) are arranged in the elastic layer, the rubber pad (2) is arranged on the elastic layer, the liquid storage tank (1) is arranged on the rubber pad (2), a hemispherical tuned liquid damper (6) is arranged under the ground where the elastic layer is located, the hemispherical tuned liquid damper (6) is fixedly connected with the elastic layer, the inner concave surface of the hemispherical tuned liquid damper (6) faces upwards, high-viscosity liquid is filled in the hemispherical tuned liquid damper (6), and a pressure sensor (11) is arranged in the hemispherical tuned liquid damper (6);
the high-viscosity liquid storage tank (7) is communicated with the hemispherical tuned liquid damper (6) through a liquid conveying pipeline (4), a valve (3) is arranged on the liquid conveying pipeline (4), a liquid suction pump and a liquid discharge pump which are communicated with the liquid conveying pipeline (4) are arranged on the high-viscosity liquid storage tank (7), the liquid suction pump sucks high-viscosity liquid from the hemispherical tuned liquid damper (6) through the liquid conveying pipeline (4), and the liquid discharge pump infuses the high-viscosity liquid into the hemispherical tuned liquid damper (6) through the liquid conveying pipeline (4);
the intelligent reaction device comprises a terminal computer (8), wherein the terminal computer (8) is connected with a pressure sensor (11) and used for receiving liquid pressure information in the hemispherical tuned liquid damper (6), the terminal computer (8) is also connected with a valve (3), a liquid suction pump and a liquid discharge pump, the terminal computer (8) is also connected with an acceleration sensor (9) and used for receiving earthquake main frequency, and the acceleration sensor (9) is arranged under the ground;
the terminal computer (8) calculates the actual liquid height in the hemispherical tuned liquid damper (6) according to the shape information and the liquid pressure information of the hemispherical tuned liquid damper (6), the terminal computer (8) calculates the adaptive liquid height adaptive to the earthquake main frequency in combination with the earthquake main frequency, the terminal computer (8) compares the actual liquid height with the adaptive liquid height, and controls the liquid suction pump, the liquid discharge pump and the valve (3) to enable the actual liquid height in the hemispherical tuned liquid damper (6) to reach the adaptive liquid height.
2. The intelligent frequency-modulation vibration damping device for the liquid storage tank as claimed in claim 1, wherein: the central shaft of the liquid storage tank (1) and the central shaft of the rubber pad (2) are on the same vertical line.
3. The intelligent frequency-modulation vibration damping device for the liquid storage tank as claimed in claim 2, wherein: the central axis of the hemispherical tuned liquid damper (6) and the central axis of the rubber pad (2) are on the same vertical line.
4. The intelligent frequency-modulation vibration damping device for the liquid storage tank as claimed in claim 3, wherein: and a shell (12) is covered on the outer wall of the hemispherical tuned liquid damper (6).
5. The intelligent frequency-modulation vibration damping device for the liquid storage tank as claimed in claim 1, wherein: a partition plate (10) is installed on the bottom wall inside the liquid storage tank (1), and the partition plate (10) is perpendicular to the bottom wall of the liquid storage tank (1).
6. The intelligent frequency-modulation vibration damping device for the liquid storage tank as claimed in claim 1, wherein: the stress direction of the spring damper (5) is vertical to the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311244.6A CN109083974B (en) | 2018-11-06 | 2018-11-06 | Intelligent frequency modulation shock-proof device for liquid storage tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811311244.6A CN109083974B (en) | 2018-11-06 | 2018-11-06 | Intelligent frequency modulation shock-proof device for liquid storage tank |
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| CN109083974B true CN109083974B (en) | 2020-05-22 |
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| CN109915286A (en) * | 2019-04-23 | 2019-06-21 | 江苏博润通科技有限公司 | Circulation fluid reservoir is swung in automobile-used oxyhydrogen generator suppression |
| CN111305280A (en) * | 2020-03-10 | 2020-06-19 | 广西大学 | Seismic isolation and reduction system and method |
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| RU2338828C2 (en) * | 2006-09-27 | 2008-11-20 | Открытое акционерное общество по проектированию строительства мостов "Институт Гипростроймост" | Bridge bearing |
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