CN115095795A - Fluid pulsation active suppression device and system based on distributed piezoelectric ceramics - Google Patents
Fluid pulsation active suppression device and system based on distributed piezoelectric ceramics Download PDFInfo
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- CN115095795A CN115095795A CN202210645368.8A CN202210645368A CN115095795A CN 115095795 A CN115095795 A CN 115095795A CN 202210645368 A CN202210645368 A CN 202210645368A CN 115095795 A CN115095795 A CN 115095795A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 80
- 230000010349 pulsation Effects 0.000 title claims abstract description 79
- 239000012530 fluid Substances 0.000 title claims abstract description 52
- 230000001629 suppression Effects 0.000 title claims abstract description 27
- 230000001902 propagating effect Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000644 propagated effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
- F16L55/052—Pneumatic reservoirs
- F16L55/053—Pneumatic reservoirs the gas in the reservoir being separated from the fluid in the pipe
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The application provides a fluid pulsation active suppression device and system based on distributed piezoelectric ceramics. The device can generate pressure pulsation to fluid in the rubber pipeline through the annular piezoelectric ceramic groups distributed on the outer wall of the rubber pipeline, each annular piezoelectric ceramic group can generate pressure pulsation in the upper direction and the lower direction, and the pressure pulsation propagating upwards can be superposed layer by layer to obtain larger pulsation amplitude, so that the pressure pulsation of the fluid in the main pipeline is counteracted; the ineffective pressure pulsation propagated downwards can be transmitted to the air bag for absorption. The device has simple structure and convenient installation, can obtain wider pressure pulsation frequency domain by the mode of connecting a plurality of annular piezoelectric ceramic groups in series, and is suitable for application scenes of high-frequency pulsation fluid and continuous operation. When the active control action of the annular piezoelectric ceramic group is partially or completely failed, the rubber pipeline and the air bag can still serve as a passive pressure pulsation suppressor, and the damage to equipment caused by overlarge pressure pulsation is prevented.
Description
Technical Field
The invention relates to the field of pipeline systems, in particular to a fluid pulsation active suppression device and system based on distributed piezoelectric ceramics.
Background
The pipeline is an indispensable system component in fluid transmission, transmission and control engineering, is mainly used for transmission of fluid media, fluid power and transmission of fluid information, and is widely applied in many fields. Due to the periodic movement of the power source, the fluid inside the pipeline generates periodic excitation to the fluid medium inside the pipeline when being transmitted, and the periodic excitation is called pressure pulsation. Pressure pulsations can be transmitted along the flow lines in the fluid medium inside the lines, causing fluid noise, affecting the working quality of the system and components, and may cause resonance, damaging the line system, causing major accidents. It is therefore of great importance to try to suppress or eliminate fluid pressure pulsations in the pipe system.
From the control mechanism, the control techniques of pipeline vibration and internal fluid pressure pulsation are mainly divided into: passive control techniques and active control techniques. The passive control technology mainly adopts a damper to reduce the vibration transfer rate, for example, measures such as adopting a low-rigidity flexible connecting pipe and laying a viscoelastic high-damping material to absorb and dissipate vibration energy are adopted, and the passive control technology has the advantages of definite vibration damping mechanism, simple structure, no need of energy input, convenience in operation, better inhibition effect on high-frequency vibration and the like. However, the passive control technology can only eliminate the vibration of the pipeline, reduce the risk of resonance and has small pressure pulsation effect on the fluid in the pipeline. The active control technology is mainly characterized in that a vibration signal of a pipeline system is acquired through a sensing element, an output control signal is applied to an actuating element by a controller according to the vibration signal, and the vibration of the pipeline system is controlled through the actuating element. The active control method has strong followability and high practical value. With the development of control technology and actuating elements, master control damping systems are becoming the current research hotspots.
The common active control method mainly depends on a flat ring structure consisting of a flat spring and piezoelectric ceramics to realize the function of variable stiffness, and realizes active control through the piezoelectric ceramics, but the deformation amount of single piezoelectric ceramics is extremely small, and the amplitude of the active regulation action on the pipeline is limited.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a fluid pulsation active suppression device and a system based on distributed piezoelectric ceramics.
In a first aspect, the present application provides an active suppression device for fluid pulsation based on distributed piezoelectric ceramics, including: the rubber pipeline is vertically connected with the main pipeline, a plurality of annular piezoelectric ceramic groups are distributed along the extending direction of the rubber pipeline, an air bag positioned below the annular piezoelectric ceramic groups is arranged inside the rubber pipeline, and the air bag is provided with an air pipe communicated with the outside of the rubber pipeline.
Preferably, the annular piezoelectric ceramic groups are distributed at equal intervals, each annular piezoelectric ceramic group comprises a plurality of arc piezoelectric ceramic pieces, and the radians of the piezoelectric ceramic pieces are matched with the rubber pipelines.
Preferably, the main pipeline is further provided with rubber dampers positioned on two sides of the rubber pipeline.
Preferably, the tail end of the rubber pipeline is further provided with a discharge valve, and the discharge valve is positioned below the air bag.
In a second aspect, the present application provides a distributed piezoelectric ceramic-based fluid pulsation active suppression system, including the above-mentioned distributed piezoelectric ceramic-based fluid pulsation active suppression apparatus, further including: the piezoelectric actuator comprises a main sensor arranged at the front end of the main pipeline, a feedback sensor arranged at the rear end of the main pipeline, and a controller connected with the main sensor and the feedback sensor, wherein a plurality of piezoelectric actuators are correspondingly connected between the controller and the annular piezoelectric ceramic group.
The beneficial effect of this application is as follows:
the device can generate acting force on the rubber pipeline through the annular piezoelectric ceramic groups distributed on the outer wall of the rubber pipeline, so that pressure pulsation is generated on fluid in the rubber pipeline, each annular piezoelectric ceramic group can generate pressure pulsation in the upper direction and the lower direction, the pressure pulsation propagating upwards can be superposed layer by layer to obtain larger pulsation amplitude, and the pressure pulsation existing in the fluid in the main pipeline is offset; the ineffective pressure pulsation propagating downward can be transmitted to the inflatable air bag for absorption. Compared with the prior art, the device has the advantages of simple structure and convenience in installation, can obtain wider pressure pulsation frequency domain in a mode of connecting a plurality of annular piezoelectric ceramic groups in series, and is suitable for application scenes of high-frequency pulsating fluid and continuous operation. In addition, under special conditions, when the active control action of the annular piezoelectric ceramic group is partially or completely failed, the rubber pipeline and the air bag arranged in the device can still serve as a passive pressure pulsation suppressor, so that certain suppression effect on pressure pulsation is still achieved, and damage to equipment caused by overlarge pressure pulsation is prevented.
Drawings
For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fluid pulsation active suppression device based on distributed piezoelectric ceramics according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a principle of a fluid pulsation active suppression device based on distributed piezoelectric ceramics according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fluid pulsation active suppression system based on distributed piezoelectric ceramics according to an embodiment of the present invention;
shown in the figure:
the device comprises a main pipeline 1, a rubber pipeline 2, an annular piezoelectric ceramic group 3, a piezoelectric ceramic sheet 31, an air bag 4, an air pipe 41, a rubber damper 5, a discharge valve 6, a main sensor 10, a distributed piezoelectric ceramic-based fluid pulsation active suppression device 11, a feedback sensor 20, a controller 30 and a multi-channel piezoelectric driver 40.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
Aiming at the defects of the prior art, the scheme provides a fluid pulsation active suppression device and system based on distributed piezoelectric ceramics. Referring to fig. 1, a schematic structural diagram of a distributed piezoelectric ceramic-based fluid pulsation active suppression apparatus according to an embodiment of the present invention is shown. As can be seen from fig. 1, the present application provides an active fluid pulsation suppression device based on distributed piezoelectric ceramics, including: the rubber pipeline 2 is vertically connected to the main pipeline 1, a plurality of annular piezoelectric ceramic groups 3 are distributed along the extending direction of the rubber pipeline 2, an air bag 4 located below the annular piezoelectric ceramic groups 3 is arranged inside the rubber pipeline 2, and the air bag 4 is provided with an air pipe 41 communicated with the outside of the rubber pipeline 2. Before the device is used, the air bag 4 can be inflated through the air pipe 41, and the air bag 4 filled with air can absorb downward pressure pulsation generated by the annular piezoelectric ceramic group 3.
The device can generate acting force on the rubber pipeline 2 through the annular piezoelectric ceramic groups 3 distributed on the outer wall of the rubber pipeline 2, so that pressure pulsation is generated on fluid in the rubber pipeline 2, each annular piezoelectric ceramic group 3 can generate pressure pulsation in the upper direction and the lower direction, the pressure pulsation propagating upwards can be superposed layer by layer to obtain larger pulsation amplitude, and the pressure pulsation existing in the fluid in the main pipeline 1 is counteracted; the ineffective pressure pulsation propagating downward can be transmitted to the inflatable airbag 4 for absorption. Compared with the prior art, the device has simple structure and convenient installation, can obtain wider pressure pulsation frequency domain in a mode of connecting a plurality of annular piezoelectric ceramic groups 3 in series, and is suitable for application scenes of high-frequency pulsating fluid and continuous operation. In addition, under special conditions, when the active control action of the annular piezoelectric ceramic group 3 is partially or completely failed, the rubber pipeline 2 and the air bag 4 arranged in the device can still serve as passive pressure pulsation suppressors, so that certain suppression effect on pressure pulsation is still achieved, and the damage to equipment caused by overlarge pressure pulsation is prevented. In the present application, the upward direction is the direction close to the main pipe 1, and the downward direction is the direction away from the main pipe 1.
In the preferred embodiment of the present application, the plurality of annular piezoelectric ceramic groups 3 are equally spaced so as to control the amplitude of the pressure pulsation input to the main pipe 1. The annular piezoelectric ceramic group 3 comprises a plurality of arc-shaped piezoelectric ceramic pieces 31, and the radians of the piezoelectric ceramic pieces 31 are matched with the rubber pipeline 2. In addition, when the annular piezoelectric ceramic group 3 works, the generated vibration can be transmitted to the main pipeline, and a new influence is caused on the main pipeline, therefore, in the preferred embodiment of the present application, the rubber dampers 5 located on two sides of the rubber pipeline 2 are further arranged on the main pipeline 1, so as to prevent the vibration generated by the rubber pipeline 2 from being transmitted to the main pipeline 1. The rubber damper 5 can also be used as a passive pressure pulsation suppressor, has a certain suppression effect on pressure pulsation, and prevents equipment from being damaged due to overlarge pressure pulsation. In addition, the tail end of the rubber pipeline 2 can be provided with a discharge valve 6, and the discharge valve 6 is positioned below the air bag 4. Before using this device, can arrange the material through blow-off valve 6 earlier, ensure to be full of the fluid in the rubber tube way 2, prevent to remain the bubble in the rubber tube way 2 and influence annular piezoceramics group 3 to the pulsating inhibitory effect of fluid.
Referring to fig. 2 and fig. 3, a schematic diagram of a principle of a distributed piezoelectric ceramic-based fluid pulsation active suppression device according to an embodiment of the present invention and a schematic diagram of a structure of a distributed piezoelectric ceramic-based fluid pulsation active suppression system according to an embodiment of the present invention are shown, respectively. As can be seen from fig. 2 and 3, the system includes the distributed piezoelectric ceramic-based fluid pulsation active suppression apparatus 11 according to the above embodiment, and further includes a main sensor 10 disposed at the front end of the main pipeline 1, a feedback sensor 20 disposed at the rear end of the main pipeline 1, and a controller 30 connected with the main sensor 10 and the feedback sensor 20, wherein the main sensor 10 can detect the vibration frequency, amplitude and phase of the inherent pulsation to be suppressed, the controller 30 receives the information, after analog-to-digital conversion, filtering and calculation according to the control algorithm such as PID, and phase adjustment is carried out, finally, the control signals are correspondingly output to the annular piezoelectric ceramic group 3 through the multi-channel piezoelectric driver 40, the annular piezoelectric ceramic group 3 can excite the rubber pipeline 2 after receiving the control signals, the electric energy is converted into mechanical energy, and then the fluid in the rubber pipeline 2 is acted. Meanwhile, the feedback sensor 20 can detect the vibration frequency and amplitude information of the main pipeline 1 after vibration reduction, and can monitor the vibration reduction effect of the main pipeline 1 in real time, so as to ensure the stability and reliability of the system.
Specifically, the primary sensor 10 may be mounted near the source of the pressure pulsations and the feedback sensor 20 may be mounted near the area of operation of the piping system. The controller 30 acquires the pressure pulsation signal of the fluid in the main pipeline 1 acquired by the main sensor 10, enters a control program through analog-to-digital conversion and filtering processing, and provides a reverse pressure pulsation signal P by adopting a PID algorithm. The reverse pressure pulsation signal P is dispersed by the multi-channel piezoelectric driver 40 and then outputs the signal P with the same strength according to different time differences 1 、P 2 、……、P n 。
Calculating a signal P corresponding to each piezoelectric ceramic by means of a distributed vibration control principle according to the speed of the pulsating wave in the fluid and the position of the arranged piezoelectric ceramic 1 、P 2 、……、P n ，
Wherein, in the step (A),
signal changes with time, n represents the weave of the annular piezoelectric ceramic group 3The number of the mobile station is,
、
、
respectively representing the amplitude, period and phase of the mth component of the signal, where x n -x 1 The distance from the nth piezoelectric ceramic to the first annular piezoelectric ceramic group 3 is shown, and v represents the speed of transmission of a pulsating wave in the fluid. In this embodiment, the first annular piezoelectric ceramic group 3 is the annular piezoelectric ceramic group 3 at the lowermost end of the rubber pipe 2.
After the system enters a working state, from the first annular piezoelectric ceramic group 3, reverse pressure pulsation generated by the annular piezoelectric ceramic group 3 can be transmitted to the upper end and the lower end, the pressure pulsation transmitted downwards is absorbed after reaching the air bag 4 and then disappears, when the pulsation transmitted upwards passes through the second annular piezoelectric ceramic group 3, the second annular piezoelectric ceramic group 3 can generate excitation the same as that of the first annular piezoelectric ceramic group 3, active pulsation generated by the second annular piezoelectric ceramic group 3 on fluid can be transmitted to the upper direction and the lower direction, the pulsation transmitted downwards is absorbed after reaching the air bag 4, and the pressure pulsation transmitted upwards is overlapped with the pressure pulsation transmitted upwards generated by the first annular piezoelectric ceramic group 3, so that the effect of pulse amplification is achieved. In this way, the pressure pulsation propagating upwards generated by the first annular piezoelectric ceramic group 3 is amplified by multiple layers and transmitted to the main pipeline 1, and the pressure pulsation is offset with the pressure pulsation in the main pipeline 1, so that stable fluid is obtained in the working area of the pipeline system.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
Claims (5)
1. A fluid pulsation active suppression device based on distributed piezoelectric ceramics is characterized by comprising: the rubber pipeline (2) is vertically connected to the main pipeline (1), a plurality of annular piezoelectric ceramic sets (3) are distributed along the extending direction of the rubber pipeline (2), an air bag (4) located below the annular piezoelectric ceramic sets (3) is arranged inside the rubber pipeline (2), and an air pipe (41) communicated with the outside of the rubber pipeline (2) is arranged on the air bag (4).
2. The active suppression device of fluid pulsation based on distributed piezoelectric ceramics according to claim 1, wherein the plurality of annular piezoelectric ceramic groups (3) are distributed at equal intervals, the annular piezoelectric ceramic groups (3) comprise a plurality of arc-shaped piezoelectric ceramic pieces (31), and the radian of the piezoelectric ceramic pieces (31) is matched with that of the rubber pipeline (2).
3. The active fluid pulsation suppression device based on distributed piezoelectric ceramics according to claim 1, wherein rubber dampers (5) are further arranged on the main pipeline (1) and are positioned on two sides of the rubber pipeline (2).
4. The active suppression device of fluid pulsation based on distributed piezoelectric ceramics according to claim 1, characterized in that the tail end of the rubber pipeline (2) is further provided with a discharge valve (6), and the discharge valve (6) is positioned below the air bag (4).
5. A distributed piezoelectric ceramic based fluid pulsation active suppression system, comprising the distributed piezoelectric ceramic based fluid pulsation active suppression apparatus according to any one of claims 1 to 4, further comprising: the piezoelectric actuator comprises a main sensor (10) arranged at the front end of the main pipeline (1), a feedback sensor (20) arranged at the rear end of the main pipeline (1), and a controller (30) connected with the main sensor (10) and the feedback sensor (20), wherein a plurality of piezoelectric actuators (40) are correspondingly connected between the controller (30) and the annular piezoelectric ceramic group (3).
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| CN202210645368.8A CN115095795A (en) | 2022-06-09 | 2022-06-09 | Fluid pulsation active suppression device and system based on distributed piezoelectric ceramics |
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| CN202210645368.8A CN115095795A (en) | 2022-06-09 | 2022-06-09 | Fluid pulsation active suppression device and system based on distributed piezoelectric ceramics |
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|---|---|---|---|---|
| SU866429A1 (en) * | 1980-01-29 | 1981-09-23 | Предприятие П/Я Г-4605 | Hydraulic pulser for graduating pressure sensors |
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2022
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Non-Patent Citations (1)
| Title |
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