CN112327067A - Flow-induced vibration energy harvesting model performance experiment testing device - Google Patents
Flow-induced vibration energy harvesting model performance experiment testing device Download PDFInfo
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- CN112327067A CN112327067A CN202011127068.8A CN202011127068A CN112327067A CN 112327067 A CN112327067 A CN 112327067A CN 202011127068 A CN202011127068 A CN 202011127068A CN 112327067 A CN112327067 A CN 112327067A
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000003306 harvesting Methods 0.000 title claims abstract description 13
- 238000002474 experimental method Methods 0.000 title abstract description 8
- 230000001939 inductive effect Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 abstract description 14
- 238000005192 partition Methods 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/22—Measuring piezoelectric properties
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Abstract
The invention provides a flow-induced vibration energy harvesting model performance experiment testing device which comprises an air inducing channel, an exhaust fan, a heat ray anemograph and a piezoelectric beam, wherein the air inducing channel comprises an inlet section, a flow stabilizing section and a testing section which are sequentially connected, the inlet section is of a tapered structure with a smooth curved inner wall, the flow stabilizing section is arranged in a straight mode, a plurality of flow stabilizing partition plates and a honeycomb-shaped grid plate are sequentially arranged in the flow stabilizing section at intervals along the air inlet direction, a plurality of round holes are uniformly formed in the flow stabilizing partition plates, the round holes in two adjacent flow stabilizing partition plates are mutually staggered, the testing section and the flow stabilizing section are arranged in an equal diameter mode, the exhaust fan is installed at the air outlet end of the testing section, the heat ray anemograph is attached to the top wall of the testing section, one end of the piezoelectric beam is fixed on the top wall of the testing. The flow-induced vibration energy harvesting model performance experiment testing device has the advantages of scientific design, accurate measurement data, good experiment effect and strong practicability.
Description
Technical Field
The invention relates to an experimental device, in particular to a flow-induced vibration energy harvesting model performance experimental testing device.
Background
The flow-induced vibration energy harvesting refers to the collection of energy generated by vibration of an object due to flow of environmental fluid, in recent years, the collection of flow-induced vibration piezoelectric energy as an environment-friendly, continuous and efficient energy harvesting technology gradually becomes a research hotspot, accurate measurement of parameters such as fluid velocity and the like is a premise for guaranteeing accurate experimental results, but the measurement of parameters such as fluid flow velocity, vibration amplitude and the like by the existing experimental equipment is not accurate, the measurement results cannot be guaranteed, and a certain obstacle is caused to the research of a physical model of the flow-induced vibration energy harvesting.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a flow-induced vibration energy harvesting model performance experimental test device which is scientific in design, accurate in measured data, good in experimental effect and strong in practicability.
In order to achieve the purpose, the invention adopts the technical scheme that: a flow-induced vibration energy harvesting model performance experiment testing device comprises an induced air channel, an exhaust fan, a hot-wire anemometer and a piezoelectric beam, the air inducing channel comprises an inlet section, a steady flow section and a testing section which are connected in sequence, the inlet section is of a tapered structure with a smooth curved surface on the inner wall, the flow stabilizing section is arranged straightly, a plurality of flow stabilizing partition plates and a honeycomb-shaped grid plate are sequentially arranged in the flow stabilizing section at intervals along the air inlet direction, a plurality of round holes are uniformly arranged on the flow stabilizing partition plates, the round holes on two adjacent flow stabilizing partition plates are staggered with each other, the testing section and the flow stabilizing section are arranged in an equal diameter mode, the exhaust fan is arranged at the air outlet end of the testing section, the hot wire anemoscope is attached to the top wall of the testing section, one end of the piezoelectric beam is fixed to the top wall of the testing section, and a Fu energy model fixing device is arranged at the other end of the piezoelectric beam.
Based on the above, the material of induced air passageway is organic glass.
Based on the above, the top wall of the test section is provided with a mounting hole corresponding to the top end of the piezoelectric beam.
Based on the above, the exhaust fan is provided with the speed-regulating frequency converter.
Based on the above, the device further comprises a laser range finder and a laser displacement sensor, wherein the laser displacement sensor is used for being installed on the Fu energy model, and the laser range finder and the laser displacement sensor are mutually matched so as to test the swing amplitude of the Fu energy model.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly, the invention utilizes the exhaust fan to exhaust the induced air channel to form negative pressure in the induced air channel, so that air flows in from the inlet section, the inlet section adopts a tapered structure, the air inflow can be increased, the circular holes on the steady flow partition plates are arranged in a staggered manner, so that the air flow is divided and collected for multiple times, the distribution is more uniform, when the air flow passes through the honeycomb-shaped grid plate, the air flow is further and evenly distributed, so that the air speed measured by the hot air velocimeter is consistent with the air speed borne by the fu energy model, the measurement is more accurate, the piezoelectric beam can convert the vibration of the fu energy model into electric energy through the piezoelectric effect, and the conversion effect can be compared.
The material of the induced air channel is organic glass, so that researchers can conveniently observe the experimental process; the mounting hole facilitates mounting of the piezoelectric beam; the speed-regulating frequency converter is convenient for regulating the wind speed in the induced draft channel and researching the fu energy curve of the fu energy model; the laser range finder and the laser displacement sensor are arranged, so that the displacement of the Fu energy model in the vibration process can be accurately tested, the precision can reach 0.1mm, and the precision is an important parameter in the flow induced vibration energy collecting system.
Drawings
FIG. 1 is a schematic structural diagram of a performance experiment testing device of a flow-induced vibration energy trapping model in the invention.
In the figure: 1. an inlet section; 2. a steady flow section; 3. a testing section; 4. an exhaust fan; 5. a piezoelectric beam; 6. an energy harvesting model; 7. a hot wire anemometer; 8. a flow stabilizing baffle plate; 9. a honeycomb-shaped grid plate.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in figure 1, the flow-induced vibration energy harvesting model performance experiment testing device comprises an air inducing channel, an air exhauster 4, a hot wire anemograph 7 and a piezoelectric beam 5, wherein the air inducing channel comprises an inlet section 1, a steady flow section 2 and a testing section 3 which are sequentially connected, the inlet section 1 is of a tapered structure with a smooth curved surface on the inner wall, the steady flow section 2 is arranged straightly, three steady flow partition plates 8 and a honeycomb-shaped grid plate 9 are sequentially arranged in the steady flow section 2 along the air inlet direction at intervals, a plurality of round holes are uniformly formed in the steady flow partition plates 8, the round holes in two adjacent steady flow partition plates 8 are staggered, the cross section of the honeycomb-shaped grid plate 9 is formed by splicing a plurality of hexagonal holes, the testing section 3 and the steady flow section 2 are arranged in an equal diameter mode, the air exhauster 4 is installed at the air outlet end of the testing section 3, the hot wire anemograph 7 is attached to the top wall of the testing section 3, the top wall of the testing section 3 is provided with a mounting hole corresponding to the top end of the piezoelectric beam 5, one end of the piezoelectric beam 5 is fixed in the mounting hole, and the other end of the piezoelectric beam 5 is provided with a Fu can model fixing device so as to fix the Fu can model 6.
When the device is used specifically, the fu energy model 7 is fixed below the piezoelectric beam 5, the induced air channel is induced by the exhaust fan 4 to form negative pressure inside the induced air channel, air flows in from the inlet section 1, the inlet section 1 adopts a tapered structure and can increase the air inflow, the round holes on the steady flow partition plates 8 are staggered, so that the air flow is divided and collected for multiple times and distributed more uniformly, when the air flow passes through the honeycomb grid plate 9, the air flow is further distributed uniformly, so that the wind speed measured by the hot air velocimeter 7 is consistent with the wind speed received by the fu energy model 6, the measurement is more accurate, the piezoelectric beam 5 can convert the vibration of the fu energy model 6 into electric energy through the piezoelectric effect so as to compare the conversion effect,
in order to observe the internal situation at the edge, the air inducing channel is made of organic glass; in order to adjust the wind speed conveniently, a speed-adjusting frequency converter is arranged on the exhaust fan 4.
In the flow-induced vibration research, the vibration displacement of the Fu energy model 6 is also an important parameter, in order to accurately measure the parameter, the flow-induced vibration research device further comprises a laser distance meter and a laser displacement sensor, the laser displacement sensor is used for being installed on the Fu energy model 6, the laser distance meter and the laser displacement sensor are mutually matched so as to test the swing amplitude of the Fu energy model, and the measurement precision can reach 0.1 mm.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a flow and cause vibration energy harvesting model capability test testing arrangement which characterized in that: including induced air passageway, air exhauster, hot line anemoscope and piezoelectric beam, the induced air passageway is including the entrance, stationary flow section and the test section of connecting in order, the entrance is the gradual shrinkage formula structure of smooth curved surface for the inner wall, the straight setting in the stationary flow section, along air inlet direction interval setting in proper order in the stationary flow section have polylith stationary flow baffle and a honeycomb grid, a plurality of round holes have evenly been seted up on the stationary flow baffle, adjacent two the round hole staggers each other on the stationary flow baffle, the test section with stationary flow section constant diameter sets up, the air exhauster is installed the air-out end of test section, hot line anemoscope pastes and establishes on the roof of test section, piezoelectric beam one end is fixed on the test section roof, the other end of piezoelectric beam is provided with fu can model fixing device.
2. The experimental testing device for flow induced vibration performance of claim 1, characterized in that: the air inducing channel is made of organic glass.
3. The experimental testing device for the flow induced vibration performance of claim 2, characterized in that: and the top wall of the test section is provided with a mounting hole corresponding to the top end of the piezoelectric beam.
4. The experimental testing device for the flow induced vibration performance of claim 3, wherein: and the exhaust fan is provided with a speed-regulating frequency converter.
5. The experimental testing device for the flow induced vibration performance according to any one of claims 1 to 4, characterized in that: the device also comprises a laser range finder and a laser displacement sensor, wherein the laser displacement sensor is used for being installed on the Fu energy model, and the laser range finder and the laser displacement sensor are mutually matched so as to test the swing amplitude of the Fu energy model.
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| CN202011127068.8A CN112327067A (en) | 2020-10-20 | 2020-10-20 | Flow-induced vibration energy harvesting model performance experiment testing device |
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| CN202011127068.8A CN112327067A (en) | 2020-10-20 | 2020-10-20 | Flow-induced vibration energy harvesting model performance experiment testing device |
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Application publication date: 20210205 |