CN114987727B - Self-powered disturbance suppression device for pump valve pipe network of ship power system - Google Patents
Self-powered disturbance suppression device for pump valve pipe network of ship power system Download PDFInfo
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- CN114987727B CN114987727B CN202210678392.1A CN202210678392A CN114987727B CN 114987727 B CN114987727 B CN 114987727B CN 202210678392 A CN202210678392 A CN 202210678392A CN 114987727 B CN114987727 B CN 114987727B
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- 230000001629 suppression Effects 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 43
- 230000001133 acceleration Effects 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 239000002356 single layer Substances 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000003306 harvesting Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 239000002243 precursor Substances 0.000 description 4
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- 238000000926 separation method Methods 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
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- 230000005764 inhibitory process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
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- Reciprocating Pumps (AREA)
Abstract
The invention discloses a self-powered disturbance suppression device for a pump valve pipe network of a ship power system, which comprises the following components: the system comprises a centrifugal water pump, a side-discharge loop, a first passive check valve, a second passive check valve, a regulating valve, a first piezoelectric vibration energy collector and a first power supply circuit management module. The centrifugal water pump is arranged on a pipe network pipeline. One end of the side-discharging loop is connected with a pipe network pipeline at the water outlet of the centrifugal water pump, and the other end of the side-discharging loop is connected with water collecting equipment. The first passive check valve is arranged on the bypass loop and is close to one end of the bypass loop. The second passive one-way valve is arranged on the side-row loop and is far away from one end of the side-row loop. The regulating valve is arranged on the side-discharging loop. Therefore, the self-powered disturbance suppression device for the pump valve pipe network of the ship power system has a simple and reasonable structure, realizes stable depressurization of the side-discharge loop, prevents water hammer from occurring, and improves the running safety and self-powered monitoring of related parameters.
Description
Technical Field
The invention relates to the field of ship power, in particular to a self-powered disturbance suppression device for a pump valve pipe network of a ship power system.
Background
The power system is heart of ocean platform such as boats and ships, provides power, living energy and electric power etc. for whole ocean platform, and ocean platform space such as boats and ships and bearing capacity are limited greatly than land platform, and is more outstanding to the low noise demand of equipment, because is far away from the land simultaneously, need to be showing higher than land platform to reliability etc. requirement.
The pump valve pipe network is an important component part and a typical structure of a ship power system, and in order to meet the requirements of safe and reliable operation, the water pump of the ocean platform power system is usually arranged in parallel by adopting two channels or even multiple channels. However, compared with a land fixed platform, the variable working condition of the power system of the ocean platform is frequent, and the vibration of a pump valve pipe network is greatly increased when the water pump deviates from a design point to operate. The pump is limited by inherent characteristics of a centrifugal pump and the like, when the pump runs under low working conditions, the pump can not avoid fluctuation due to the phenomena of flow separation and the like, especially in the working condition switching process, the phenomenon of unstable flow is more obvious, the fluctuation of valve stress in a pump valve pipe network is caused, even the abnormal closing of the valve is caused when the phenomenon of water hammer and the like is seriously caused, the pump valve pipe network is caused to vibrate obviously, and the safety and the low-noise running of a power system are seriously influenced.
How to avoid the occurrence of severe disturbance of a pump valve pipe network, monitor the state of the pump valve pipe network so as to identify abnormal vibration precursors of the pipe network, and avoid serious consequences by early intervention is a key point and a difficulty of the research and design of the pump valve of the current ship power system.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide the self-powered disturbance suppression device for the pump valve pipe network of the ship power system, which has a simple and reasonable structure, realizes stable depressurization of a side-discharge loop, prevents water hammer from occurring, and improves the running safety and self-powered monitoring of related parameters.
In order to achieve the above purpose, the invention provides a self-powered disturbance suppression device for a pump valve pipe network of a ship power system, comprising: the system comprises a centrifugal water pump, a side-discharge loop, a first passive check valve, a second passive check valve, a regulating valve, a first piezoelectric vibration energy collector and a first power supply circuit management module. The centrifugal water pump is arranged on a pipe network pipeline. One end of the side-discharging loop is connected with a pipe network pipeline at the water outlet of the centrifugal water pump, and the other end of the side-discharging loop is connected with water collecting equipment. The first passive check valve is arranged on the bypass loop and is close to one end of the bypass loop. The second passive one-way valve is arranged on the side-row loop and is far away from one end of the side-row loop. The regulating valve is arranged on the side-discharge loop and is positioned between the first passive one-way valve and the second passive one-way valve. The first piezoelectric vibration energy collector is arranged in the first passive check valve, can collect energy in pressure and flow fluctuation, and can provide electric energy. The first power supply circuit management module is arranged outside the first passive one-way valve and is electrically connected with the first piezoelectric vibration energy collector.
In one embodiment of the invention, the self-powered disturbance rejection device of the pump valve network of the ship power system further comprises a second piezoelectric vibration energy collector and a second power supply circuit management module. The second piezoelectric vibration energy collector is arranged in the second passive check valve, can collect energy in pressure and flow fluctuation, and can provide electric energy. And the second power supply circuit management module is arranged outside the second passive one-way valve and is electrically connected with the second piezoelectric vibration energy collector.
In an embodiment of the present invention, the arrangement directions of the first passive check valve and the second passive check valve are opposite, and the first passive check valve and the second passive check valve are tesla valves or vortex diodes.
In an embodiment of the present invention, the first passive check valve is disposed along a water flow direction to prevent backflow and water hammer, the second passive check valve is disposed along a reverse water flow direction to perform a smooth throttling function, and a forward/reverse resistance ratio of the first passive check valve and the second passive check valve is not less than 7.
In one embodiment of the present invention, the self-powered disturbance rejection device for a pump valve network of a ship power system further comprises: the device comprises a first data transceiver chip, a first sensor mechanism and a first warning mechanism. The first data transceiver chip is arranged outside the first passive one-way valve and is electrically connected with the first power circuit management module. The first sensor mechanism is arranged on the first passive one-way valve and is electrically connected with the first data transceiver chip and the first power supply circuit management module respectively. And the first warning mechanism is arranged outside the first passive one-way valve and is electrically connected with the first data transceiver chip.
In one embodiment of the present invention, the self-powered disturbance rejection device for a pump valve network of a ship power system further comprises: the second data transceiver chip, the second sensor mechanism and the second warning mechanism. The second data transceiver chip is arranged outside the second passive one-way valve and is electrically connected with the second power circuit management module. The second sensor mechanism is arranged on the second passive one-way valve and is electrically connected with the second data transceiver chip and the second power supply circuit management module respectively. The second warning mechanism is arranged outside the second passive one-way valve and is electrically connected with the second data transceiver chip.
In an embodiment of the present invention, the first sensor mechanism and the second sensor mechanism are any one or more of an acceleration sensor, a temperature sensor, a pressure sensor, and a humidity sensor.
In one embodiment of the present invention, the first piezoelectric vibration energy collector is composed of a first piezoelectric sheet and a first circuit, and the first piezoelectric sheet has a cantilever structure. Wherein, the first piezoelectric plate adopts a single-layer piezoelectric wafer. The side, close to the incoming water flow, of the first piezoelectric sheet is made of flexible piezoelectric materials, and the back surface of the first piezoelectric sheet is a metal layer. The first piezoelectric sheet is obliquely arranged on the inner wall surface of the first passive one-way valve along the water flow direction, and swings back and forth when the flow or the pressure in the pipe fluctuates, and continuously transmits electric energy to the first power circuit management module through the first circuit.
In one embodiment of the present invention, the second piezoelectric vibration energy collector is composed of a second piezoelectric sheet and a second circuit, and the second piezoelectric sheet has a cantilever structure. Wherein, the second piezoelectric plate adopts a single-layer piezoelectric wafer. The side, close to the incoming water flow, of the second piezoelectric sheet is made of flexible piezoelectric materials, and the back surface of the second piezoelectric sheet is a metal layer. The second piezoelectric sheet is obliquely arranged on the inner wall surface of the second passive one-way valve along the water flow direction, and swings back and forth when the flow or the pressure in the pipe fluctuates, and continuously transmits electric energy to the second power circuit management module through the second circuit.
In an embodiment of the present invention, the first power circuit management module and the second power circuit management module are both energy harvesting circuits, and each include a capacitor and a rectifier bridge. When the energy generated by the first piezoelectric vibration energy collector exceeds an energy threshold value or the signal of the acceleration sensor exceeds a speed threshold value, the first data transceiver chip sends an early warning signal to the first warning mechanism. When the energy generated by the second piezoelectric vibration energy collector exceeds an energy threshold value or the signal of the acceleration sensor exceeds a speed threshold value, the second data transceiver chip sends an early warning signal to the second warning mechanism.
Compared with the prior art, according to the self-powered disturbance suppression device for the pump valve pipe network of the ship power system, by relatively arranging the two passive one-way valves on the bypass loop and combining the regulating valve, the stable depressurization of the bypass loop is realized, and meanwhile, the occurrence of water hammer is prevented; the piezoelectric vibration energy collector is used for collecting flow fluctuation energy in the pump valve pipe network, so that on one hand, the flow fluctuation in the pump valve pipe network is restrained, and on the other hand, the collected capacity can supply energy for the sensor and the data transceiver chip, the self supply of energy is realized, and the system arrangement is simplified; when the output power of the sensor signal and the energy collector exceeds a certain threshold, an alarm signal is sent, and self-power sending of abnormal vibration precursor signals of the pump valve pipe network is realized, so that the operation safety of the pump valve pipe network of the ship power system and self-power monitoring of related parameters are improved.
Drawings
FIG. 1 is a schematic layout view of a self-powered disturbance rejection device for a pump valve network of a marine power system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection structure of a first passive check valve of a self-powered disturbance rejection device for a pump valve network of a marine power system according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a first piezoelectric vibration energy collector of a self-powered disturbance rejection device for a pump valve network of a marine power system according to an embodiment of the present invention.
The main reference numerals illustrate:
the device comprises a 1-centrifugal water pump, a 2-side discharge loop, a 3-first passive one-way valve, a 4-second passive one-way valve, a 5-regulating valve, a 6-first power supply circuit management module, a 7-first data transceiver chip, an 8-first sensor mechanism, a 9-first warning mechanism, a 10-first piezoelectric sheet, a 11-flexible piezoelectric material layer, a 12-piezoelectric sheet metal layer and a 13-inner wall surface.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Fig. 1 is a schematic layout view of a self-powered disturbance rejection device for a pump valve network of a marine power system according to an embodiment of the present invention. Fig. 2 is a schematic diagram of a connection structure of a first passive check valve 3 of a self-powered disturbance rejection device for a pump valve network of a marine power system according to an embodiment of the present invention. Fig. 3 is a schematic structural view of a first piezoelectric vibration energy collector of a self-powered disturbance rejection device for a pump valve network of a marine power system according to an embodiment of the present invention.
As shown in fig. 1 to 3, a self-powered disturbance rejection apparatus for a pump valve network of a ship power system according to a preferred embodiment of the present invention includes: the system comprises a centrifugal water pump 1, a side discharge loop 2, a first passive check valve 3, a second passive check valve 4, a regulating valve 5, a first piezoelectric vibration energy collector and a first power supply circuit management module 6. The centrifugal water pump 1 is arranged on a pipe network pipeline. One end of the side-discharging loop 2 is connected with a pipe network pipeline at the water outlet of the centrifugal water pump 1, and the other end of the side-discharging loop 2 is connected with water collecting equipment. The first passive check valve 3 is disposed on the bypass loop 2 and near one end of the bypass loop 2. The second passive check valve 4 is disposed on the bypass loop 2 and is far away from one end of the bypass loop 2. The regulating valve 5 is arranged on the bypass loop 2 and is positioned between the first passive check valve 3 and the second passive check valve 4. The first piezoelectric vibration energy collector is arranged in the first passive check valve 3, and can collect energy in pressure and flow fluctuation and supply electric energy. The first power circuit management module 6 is disposed outside the first passive check valve 3, and the first power circuit management module 6 is electrically connected with the first piezoelectric vibration energy collector.
In one embodiment of the invention, the self-powered disturbance rejection device of the pump valve network of the ship power system further comprises a second piezoelectric vibration energy collector and a second power supply circuit management module. The second piezoelectric vibration energy collector is arranged in the second passive check valve 4, and can collect energy when pressure and flow fluctuate and can provide electric energy. And the second power circuit management module is arranged outside the second passive one-way valve 4 and is electrically connected with the second piezoelectric vibration energy collector.
In an embodiment of the present invention, the arrangement directions of the first passive check valve 3 and the second passive check valve 4 are opposite, and the first passive check valve 3 and the second passive check valve 4 are tesla valves or vortex diodes, but the present invention is not limited thereto. The first passive check valve 3 and the second passive check valve 4 may be the same type of valve combination or different types of valve combination.
In an embodiment of the present invention, the first passive check valve 3 is disposed along the water flow direction to prevent backflow and water hammer, the second passive check valve 4 is disposed along the reverse water flow direction to perform a smooth throttling function, and the ratio of forward to reverse resistance of the first passive check valve 3 to that of the second passive check valve 4 is not less than 7.
In one embodiment of the present invention, the self-powered disturbance rejection device for a pump valve network of a ship power system further comprises: a first data transceiver chip 7, a first sensor mechanism 8 and a first warning mechanism 9. The first data transceiver chip 7 is disposed outside the first passive check valve 3, and the first data transceiver chip 7 is electrically connected to the first power circuit management module 6. The first sensor mechanism 8 is disposed on the first passive check valve 3, and the first sensor mechanism 8 is electrically connected to the first data transceiver chip 7 and the first power circuit management module 6 respectively. And the first warning mechanism 9 is arranged outside the first passive one-way valve 3, and the first warning mechanism 9 is electrically connected with the first data transceiver chip 7.
In one embodiment of the present invention, the self-powered disturbance rejection device for a pump valve network of a ship power system further comprises: the second data transceiver chip, the second sensor mechanism and the second warning mechanism. The second data transceiver chip is disposed outside the second passive check valve 4, and the second data transceiver chip is electrically connected to the second power circuit management module. The second sensor mechanism is disposed on the second passive check valve 4, and the second sensor mechanism is electrically connected to the second data transceiver chip and the second power circuit management module respectively. And the second warning mechanism is arranged outside the second passive one-way valve 4 and is electrically connected with the second data transceiver chip.
In an embodiment of the present invention, the first sensor mechanism 8 and the second sensor mechanism each include an acceleration sensor and a temperature sensor, but the present invention is not limited thereto, and the first sensor mechanism 8 and the second sensor mechanism may include only an acceleration sensor or a temperature sensor, or a humidity sensor and a pressure sensor, and may include a plurality of sensors at the same time.
In one embodiment of the present invention, the first piezoelectric vibration energy collector is composed of the first piezoelectric sheet 10 and the first circuit, and the first piezoelectric sheet 10 has a cantilever structure. Wherein the first piezoelectric sheet 10 is a single-layer piezoelectric sheet. The side of the first piezoelectric sheet 10 close to the incoming water flow is made of flexible piezoelectric material, and the back surface is a metal layer. The first piezoelectric sheet 10 is obliquely arranged on the inner wall surface 13 of the first passive check valve 3 along the water flow direction, and when the flow or pressure in the pipe fluctuates, the first piezoelectric sheet 10 swings back and forth and continuously transmits electric energy to the first power circuit management module 6 through the first circuit.
In one embodiment of the present invention, the second piezoelectric vibration energy collector is composed of a second piezoelectric sheet and a second circuit, and the second piezoelectric sheet has a cantilever structure. Wherein, the second piezoelectric plate adopts a single-layer piezoelectric wafer. The side, close to the incoming water flow, of the second piezoelectric sheet is made of flexible piezoelectric materials, and the back surface of the second piezoelectric sheet is a metal layer. The second piezoelectric sheet is obliquely arranged on the inner wall surface 13 of the second passive one-way valve 4 along the water flowing direction, and swings back and forth when the flow or the pressure in the pipe fluctuates, and continuously transmits electric energy to the second power circuit management module through the second circuit.
In one embodiment of the present invention, the first power circuit management module 6 and the second power circuit management module are both energy harvesting circuits and each include a capacitor and a rectifier bridge. When the energy generated by the first piezoelectric vibration energy collector exceeds an energy threshold value or the signal of the acceleration sensor exceeds a speed threshold value, the first data transceiver chip 7 sends an early warning signal to the first warning mechanism 9. When the energy generated by the second piezoelectric vibration energy collector exceeds an energy threshold value or the signal of the acceleration sensor exceeds a speed threshold value, the second data transceiver chip sends an early warning signal to the second warning mechanism.
In practical application, the invention aims at the problems that when a pump valve pipe network of a ship power system runs under low working conditions, a water pump deviates from a design point to flow separation, so that the outlet flow pressure of the water pump pulsates, the pump valve pipe network vibrates abnormally, even a water hammer is induced when the pump valve pipe network is severe, the safe and reliable running of the power system is influenced, and the like.
Specifically, the self-powered disturbance suppression device for the pump valve network of the ship power system comprises a centrifugal water pump 1, a bypass loop 2, a first passive check valve 3, a second passive check valve 4, a regulating valve 5, a first piezoelectric vibration energy collector, a first power supply circuit management module 6, a second piezoelectric vibration energy collector, a second power supply circuit management module, a first data transceiver chip 7, a first sensor mechanism 8, a first warning mechanism 9, a second data transceiver chip, a second sensor mechanism and a second warning mechanism. As shown in fig. 1, the above components are two, that is, two paths, but the present invention is not limited thereto, and any number and arrangement can be used. The pump valve pipe network is an important component part of the ship power system, in order to adapt to the variable working condition operation requirement of the ship power system, the water pump is usually operated under a low flow working condition deviating from a design working condition, at the moment, the water pump has pressure and flow fluctuation and the like at an outlet due to flow separation and the like, particularly, the valve is easily opened and closed in the working condition switching process, so that a water hammer is induced, and the safe and reliable operation of the power system is threatened.
According to the invention, vibration energy in a pump valve pipe network of a ship power system is collected, and piezoelectric sheets are reasonably arranged, so that pressure and flow fluctuation in the pump valve pipe network is restrained, and on the other hand, energy disturbance generated by the pressure and flow fluctuation in the pump valve pipe network is fully utilized, and is converted into electric energy to supply energy to a vibration sensor and the like, and meanwhile, a great disturbance and a water hammer aura can be early warned, so that the safety and reliability of the system are improved.
The water pump is arranged in a networking way, a bypass loop 2 is arranged at the outlet of the centrifugal water pump 1, a regulating valve 5 and two passive one-way valves (a first passive one-way valve 3 and a second passive one-way valve 4) are arranged on the bypass loop 2, for example, a Tesla valve or a vortex diode, and the regulating valve 5 is positioned between the two passive one-way valves. The two passive check valves on the side-discharge loop 2 are arranged in opposite directions, the first passive check valve 3 close to one end of the water pump is arranged along the flowing direction, backflow and water hammer are prevented, the second passive check valve 4 far away from one end of the water pump is arranged in opposite directions, a stable throttling effect is achieved, and the forward-reverse resistance ratio of each passive check valve is not less than 7.
A first piezoelectric vibration energy collector is arranged on the first passive check valve 3 close to the centrifugal water pump 1, the first piezoelectric sheet 10 is obliquely arranged on the inner wall surface 13 of the first passive check valve 3 along the flowing direction, and the flowing direction is the same as that of the first passive check valve 3, and the piezoelectric sheet swings back and forth when the flow or the pressure in the pipe fluctuates, so that the electric energy is continuously transmitted to the first power circuit management module 6.
A second piezoelectric vibration energy collector is arranged on the second passive one-way valve 4 far away from the centrifugal water pump 1, the second piezoelectric sheet is obliquely arranged on the inner wall surface 13 of the second passive one-way valve 4 along the flowing direction, and the piezoelectric sheet swings back and forth when the flow or the pressure in the pipe fluctuates in opposite direction to the flowing direction of the second passive one-way valve 4, so that the electric energy is continuously transmitted to the power circuit management module.
The piezoelectric vibration energy collector is composed of a piezoelectric sheet and a corresponding circuit, wherein the piezoelectric sheet is of a cantilever structure, the piezoelectric material is a flexible piezoelectric material, such as polyvinylidene fluoride (PVDF), a single-layer piezoelectric wafer is adopted, the flexible piezoelectric material is arranged on the side close to the incoming flow, and the back surface is a metal layer. That is, the plurality of piezoelectric patches are disposed obliquely on the inner wall surface 13 of the passive check valve, respectively, and the plurality of piezoelectric patches transmit electric power to the power circuit management module through the circuit.
The power supply circuit management module is mainly an energy collection circuit and comprises a capacitor, a rectifier bridge and the like, and after the power supply circuit management module receives the energy of the piezoelectric vibration energy collector, part of the energy is supplied to a sensor such as an acceleration sensor and the like. The power circuit management module supplies power and signals to the data transceiver chip, and the data transceiver chip receives sensor signals at the same time. When the flow disturbance in the pipeline is large, the piezoelectric vibration energy collector generates large energy, the signal indication value of the acceleration sensor is high, and a signal is sent to the control system or the warning device when one of the piezoelectric vibration energy collector and the acceleration sensor breaks through a threshold value.
The invention adopts the piezoelectric vibration energy collector to collect the energy when the pressure and the flow fluctuate, has the inhibition effect on disturbance, provides energy for the sensors such as acceleration, speed and the like, adopts the opposite arrangement mode of the front check valve and the rear check valve to inhibit the phenomena such as water hammer and the like, has strong disturbance when deviating from the design working condition, has larger electric energy provided by the piezoelectric vibration energy collector, increases the acceleration, triggers the data receiving and transmitting chip and sends signals to the control system or the warning device.
As shown in fig. 1, for minimum flow protection of the centrifugal water pump 1, a bypass loop 2 is provided, and a first passive check valve 3, a regulating valve 5 and a second passive check valve 4 are sequentially arranged on the bypass loop 2, wherein the flow direction of the first passive check valve 3 is the same as the normal flow direction of the bypass loop 2, and mainly acts to prevent water hammer and the like, and the flow direction of the second passive check valve 4 is opposite to the normal flow direction of the bypass loop 2, and mainly functions to smoothly throttle.
As shown in FIG. 2, with Tesla valve as the passive check valve example, a piezoelectric vibration energy collector is arranged in the pipeline along the flow direction, and the piezoelectric sheet is obliquely arranged along the flow direction, so that the influence on the flow is smaller in normal flow, the disturbance is weaker, the swing amplitude of the piezoelectric sheet is smaller, the frequency is lower, the output current is weaker, and related alarm and detection are not needed in normal working conditions. When the disturbance is severe, the swing amplitude of the piezoelectric sheet is increased, the disturbance inhibition effect is achieved on the flow at the same time, particularly, the backflow phenomenon is inhibited, the output current is strong, the power supply circuit management module supplies power to sensors such as acceleration and temperature after rectifying and storing, the power supply circuit management module supplies power to the sensors, meanwhile, the data transceiver chip supplies power and provides signals for the data transceiver chip, meanwhile, the data transceiver chip receives sensor signals, and when the related signals exceed a set permission threshold, the data transceiver chip sends a signal value control system and an early warning system, and sends a vibration abnormality pre-warning signal, and meanwhile, abnormal vibration of a pipeline is avoided through the control system.
As shown in fig. 3, the first piezoelectric vibration energy collector has a first piezoelectric sheet 10 which is a single-layer piezoelectric wafer adapted to collect low-frequency energy, the piezoelectric sheet being arranged obliquely in the flow direction, a flexible piezoelectric material layer 11 being arranged on the upstream side, and a piezoelectric sheet metal layer 12 being arranged on the back side.
According to the invention, the piezoelectric vibration energy collector is used for absorbing the fluctuation energy such as flow and pressure in the pump valve pipe network, so that on one hand, the fluctuation is restrained, and on the other hand, the fluctuation energy is collected to the functions of the sensor and the data transceiver chip, so that the self-power supply monitoring of the running state of the pump valve pipe network and the early warning of abnormal vibration precursors are realized. The side-discharging loop 2 adopts two passive one-way valves to be arranged oppositely, and the pressure drop of the side-discharging loop 2 is reduced steadily by combining the regulating valve 5, and the occurrence of water hammer is inhibited.
In a word, according to the self-powered disturbance suppression device for the pump valve pipe network of the ship power system, two passive one-way valves are oppositely arranged on the bypass loop 2, and the regulating valve 5 is combined, so that stable depressurization of the bypass loop 2 is realized, and meanwhile, the occurrence of water hammer is prevented; the piezoelectric vibration energy collector is used for collecting flow fluctuation energy in the pump valve pipe network, so that on one hand, the flow fluctuation in the pump valve pipe network is restrained, and on the other hand, the collected capacity can supply energy for the sensor and the data transceiver chip, the self supply of energy is realized, and the system arrangement is simplified; when the output power of the sensor signal and the energy collector exceeds a certain threshold, an alarm signal is sent, and self-power sending of abnormal vibration precursor signals of the pump valve pipe network is realized, so that the operation safety of the pump valve pipe network of the ship power system and self-power monitoring of related parameters are improved.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a boats and ships driving system pump valve pipe network self-power disturbance suppression device which characterized in that includes:
the centrifugal water pump is arranged on a pipe network pipeline;
one end of the bypass loop is connected with a pipe network pipeline at the water outlet of the centrifugal water pump, and the other end of the bypass loop is connected with water collecting equipment;
the first passive one-way valve is arranged on the bypass loop and is close to one end of the bypass loop;
the second passive one-way valve is arranged on the side-row loop and is far away from one end of the side-row loop;
the regulating valve is arranged on the side-row loop and is positioned between the first passive one-way valve and the second passive one-way valve;
a first piezoelectric vibration energy collector disposed within the first passive check valve, the first piezoelectric vibration energy collector being capable of collecting energy when pressure, flow fluctuates, and being capable of providing electrical energy; and
the first power supply circuit management module is arranged outside the first passive one-way valve and is electrically connected with the first piezoelectric vibration energy collector.
2. The self-powered disturbance rejection apparatus for a marine power system pump valve network of claim 1, further comprising:
a second piezoelectric vibration energy collector disposed within the second passive check valve, the second piezoelectric vibration energy collector being capable of collecting energy when pressure, flow fluctuates, and being capable of providing electrical energy; and
the second power supply circuit management module is arranged outside the second passive one-way valve and is electrically connected with the second piezoelectric vibration energy collector.
3. The self-powered disturbance rejection device of a marine power system pump valve network of claim 1, wherein the first passive check valve and the second passive check valve are arranged in opposite directions, and the first passive check valve and the second passive check valve are tesla valves or vortex diodes.
4. The self-powered disturbance rejection device of a marine power system pump valve pipe network according to claim 1, wherein the first passive check valve is arranged along a water flow direction to prevent backflow and water hammer, the second passive check valve is arranged along a reverse water flow direction to play a role of smooth throttling, and the forward-reverse resistance ratio of the first passive check valve and the second passive check valve is not less than 7.
5. The marine power system pump valve network self-powered disturbance rejection apparatus of claim 2, further comprising:
the first data transceiver chip is arranged outside the first passive one-way valve and is electrically connected with the first power supply circuit management module;
the first sensor mechanism is arranged on the first passive one-way valve and is electrically connected with the first data transceiver chip and the first power circuit management module respectively; and
the first warning mechanism is arranged outside the first passive one-way valve and is electrically connected with the first data transceiver chip.
6. The marine power system pump valve network self-powered disturbance rejection apparatus of claim 5, further comprising:
the second data transceiver chip is arranged outside the second passive one-way valve and is electrically connected with the second power supply circuit management module;
the second sensor mechanism is arranged on the second passive one-way valve and is electrically connected with the second data transceiver chip and the second power supply circuit management module respectively; and
the second warning mechanism is arranged outside the second passive one-way valve and is electrically connected with the second data transceiver chip.
7. The self-powered disturbance rejection device for a marine power system pump valve network of claim 6, wherein the first sensor mechanism and the second sensor mechanism are any one or more of an acceleration sensor, a temperature sensor, a pressure sensor, and a humidity sensor.
8. The self-powered disturbance rejection device for the pump valve network of the ship power system according to claim 1, wherein the first piezoelectric vibration energy collector consists of a first piezoelectric sheet and a first circuit, and the first piezoelectric sheet is in a cantilever structure;
wherein, the first piezoelectric sheet adopts a single-layer piezoelectric sheet;
the side, close to the incoming water flow, of the first piezoelectric sheet is a flexible piezoelectric material layer, and the back surface of the first piezoelectric sheet is a piezoelectric sheet metal layer;
the first piezoelectric sheet is obliquely arranged on the inner wall surface of the first passive one-way valve along the water flow direction, and swings back and forth when the flow or the pressure in the pipe fluctuates, and continuously transmits electric energy to the first power supply circuit management module through the first circuit.
9. The self-powered disturbance rejection device for the pump valve network of the ship power system according to claim 2, wherein the second piezoelectric vibration energy collector consists of a second piezoelectric sheet and a second circuit, and the second piezoelectric sheet is in a cantilever structure;
wherein, the second piezoelectric sheet adopts a single-layer piezoelectric sheet;
the side, close to the incoming water flow, of the second piezoelectric sheet is a flexible piezoelectric material layer, and the back surface of the second piezoelectric sheet is a piezoelectric sheet metal layer;
the second piezoelectric sheet is obliquely arranged on the inner wall surface of the second passive one-way valve along the water flow direction, and swings back and forth when the flow or the pressure in the pipe fluctuates, and continuously transmits electric energy to the second power supply circuit management module through the second circuit.
10. The self-powered disturbance rejection device for a marine power system pump valve network according to claim 7, wherein the first power circuit management module and the second power circuit management module are both energy harvesting circuits and each comprise a capacitor and a rectifier bridge;
when the energy generated by the first piezoelectric vibration energy collector exceeds an energy threshold value or the signal of the acceleration sensor exceeds a speed threshold value, the first data transceiver chip sends an early warning signal to the first warning mechanism;
and when the energy generated by the second piezoelectric vibration energy collector exceeds an energy threshold value or the signal of the acceleration sensor exceeds a speed threshold value, the second data transceiver chip sends an early warning signal to the second warning mechanism.
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