CN114847206A - Rotatable net device for researching hydrodynamic force - Google Patents
Rotatable net device for researching hydrodynamic force Download PDFInfo
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- CN114847206A CN114847206A CN202210611954.0A CN202210611954A CN114847206A CN 114847206 A CN114847206 A CN 114847206A CN 202210611954 A CN202210611954 A CN 202210611954A CN 114847206 A CN114847206 A CN 114847206A
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- 238000005452 bending Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000011160 research Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
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- 238000013461 design Methods 0.000 description 2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rotatable net device for researching hydrodynamic force, which comprises: the device comprises a supporting frame, a rotating device, a telescopic rod, a sliding device, a six-component force sensor, a connecting rod, a netting frame and a netting. In the hydrodynamic force process of the plane netting under the pure flow effect, the netting is fixedly designed through the netting frame and is enabled to reach a tensioning state, the length of the telescopic rod is adjusted to be matched and fixed with the netting frame, the netting incident flow angle is adjusted through the rotating device, the netting frame is moved in two dimensions through moving the sliding device and adjusting the length of the telescopic rod, and the netting testing device can meet various netting assembling conditions and testing working conditions due to the characteristics of detachability, modularization and multiple functions. The invention increases the adjustable parameters of a single netting test device and improves the netting test efficiency.
Description
Technical Field
The invention relates to the field of ship and ocean engineering, in particular to a rotatable net coat device for researching hydrodynamic force.
Background
The cage culture industry is rapidly developed along with the increase of population, but due to the limitation of offshore resources and more serious environmental pollution, the net cages are necessarily moved to deep and far sea. In the face of deep and open sea with severe environment, understanding hydrodynamic characteristics of the netting structure under ocean current conditions becomes a current research hotspot.
In the research of the hydrodynamic characteristics of the netting, model tests are a very critical research method. In general, research on the hydrodynamic force of the netting is generally divided into flow field and force measurement, that is, the change of the flow field before and after the water flow passes through the netting and the change of the force applied to the netting are researched. At present, model devices used at home and abroad are mainly square frame netting devices, the device is simple and easy to install, but the netting devices cannot meet the test conditions in consideration of more netting parameters and environment variables such as included angles between netting and flow, a multi-netting system, wave flow conditions and the like. Therefore, in the research of the hydrodynamic characteristics of the netting, a more functional netting test device is required to meet various test conditions.
Disclosure of Invention
In view of the above defects of the prior art, the technical problem to be solved by the invention is how to enable the netting test to meet various test conditions.
In order to achieve the above object, the present invention provides a rotatable netting device for researching hydrodynamic force, including a supporting frame, a netting, a first six-component force sensor, a second six-component force sensor;
one end of the first six-component force sensor is connected with one side of the netting frame, and the other end of the first six-component force sensor is connected with the supporting frame;
one end of the second six-component force sensor is connected with the other side of the netting frame, and the other end of the second six-component force sensor is connected with the supporting frame;
the netting frame is adapted to move in a lateral flow direction relative to the support frame, the netting frame being adapted to rotate relative to the support frame about an axis parallel to the direction of the netting.
Further, the rotatable netting device for researching hydrodynamic force further comprises a first connecting rod, one end of the first connecting rod is connected with one side of the netting frame far away from the second six-component force sensor, and the other end of the first connecting rod is connected with one end of the first six-component force sensor far away from the supporting frame.
Further, the rotatable net device for researching the hydrodynamic force further comprises a second connecting rod, one end of the second connecting rod is connected with one side, away from the first six-component force sensor, of the net frame, and the other end of the second connecting rod is connected with one end, away from the supporting frame, of the second six-component force sensor.
Further, the rotatable netting device for researching hydrodynamic force further comprises a third connecting rod, one end of the third connecting rod is connected with one end, away from the netting frame, of the first six-component force sensor, the other end of the third connecting rod is connected with the supporting frame, the third connecting rod is connected with the supporting frame in a sliding mode along the flow measuring direction, and the third connecting rod is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting;
the third connecting rod is suitable for stretching.
Further, the rotatable netting device for researching hydrodynamic force further comprises a first rotating device, the first rotating device is connected with the third connecting rod, the first rotating device is connected with the supporting frame in a sliding mode along the flow measuring direction, and the first rotating device is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting.
Further, the rotatable netting device for researching the hydrodynamic force further comprises a fourth connecting rod, one end of the fourth connecting rod is connected with one end, away from the netting frame, of the second six-component force sensor, the other end of the fourth connecting rod is connected with the supporting frame, the fourth connecting rod is connected with the supporting frame in a sliding mode along the flow measuring direction, and the fourth connecting rod is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting;
the fourth connecting rod is suitable for stretching.
Further, the rotatable netting device for researching hydrodynamic force further comprises a second rotating device, the second rotating device is connected with the third connecting rod, the second rotating device is connected with the supporting frame in a sliding mode along the flow measuring direction, and the second rotating device is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting.
Further, the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are located on the same straight line, the axis of rotation of the third connecting rod relative to the support frame is located on the same straight line, and the axis of rotation of the fourth connecting rod relative to the support frame is located on the same straight line.
Furthermore, the rotating device is divided into a top part and a bottom part, the top part is provided with an angle scale which is suitable for indicating the incident flow angle of the netting, the first rotating device and the second rotating device are composed of a plurality of lantern rings, the third connecting rod can rotate in the lantern rings, and the lantern rings are fixedly connected with the sliding device.
Furthermore, the rotatable netting device for researching the hydrodynamic force further comprises a sliding device, wherein the sliding device consists of two main cross beams and a sliding beam, the top and the bottom of the sliding device are respectively provided with one set, the main cross beams are fixedly connected with the supporting frame, and the sliding beam is fixed on the main cross beams through bolts capable of being screwed; and/or the presence of a gas in the gas,
the third connecting rod is formed by nesting a plurality of hollow round rods with the diameters sequentially reduced, the nested round rods can move mutually and are fixed through bolts, the upper end of the third connecting rod is provided with an arrow suitable for displaying a rotating angle, and the lower end of the third connecting rod is connected with the first six-component force sensor; and/or the presence of a gas in the gas,
the fourth connecting rod is formed by nesting a plurality of hollow round rods with the diameters sequentially reduced, the nested round rods can move mutually and are fixed through bolts, the lower end of the fourth connecting rod is provided with an arrow suitable for displaying a rotating angle, and the upper end of the fourth connecting rod is connected with the second six-component force sensor; and/or the presence of a gas in the gas,
the first six-component force sensor and the second six-component force sensor are suitable for measuring stress and bending moment in three directions under the current state; and/or the presence of a gas in the gas,
the netting frame is made of stainless steel, the cross section of the netting frame is streamline to reduce the influence on the surrounding flow state, and the inner side of the netting frame is provided with small holes for fixing the netting and enabling the netting to be in a tensioning state.
The technical effects are as follows:
in the device, in the process of measuring the hydrodynamic force of the netting under the action of water flow, based on the modularized and detachable design, the functions of adjustable angle and position are realized, the device can adapt to various working conditions, and the adaptability of a test site is realized in a mode of detaching an outer frame; the fixing of different sizes of netting frames is realized by changing the length of the telescopic rod. The netting test can meet more and more test working conditions.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 is a front view of a rotatable web apparatus for investigating hydrodynamic force according to the present invention;
FIG. 2 is an isometric view of a rotatable netting apparatus of the present invention for researching hydrodynamic forces;
FIG. 3 is a schematic view of the top and bottom rotating assemblies of the present invention for use in developing a hydrodynamic rotatable netting device;
fig. 4 is a partially enlarged view of the rotatable type net apparatus for researching hydrodynamic force according to the present invention.
Reference numerals:
1. a support frame; 2-1, a first rotating device; 2-2, a second rotating device; 3. a sliding device; 4-1, a third connecting rod; 4-2, a fourth connecting rod; 5-1, a first sixth component force sensor; 5-2, a second sixth component force sensor; 6-1, a first connecting rod; 6-2, a second connecting rod; 7. a netting frame; 8. and (5) netting.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1 to 4, in an embodiment of the present invention, there is provided a rotatable netting 8 apparatus for studying hydrodynamic force, including a support frame 1, a netting frame 7, a netting 8, a first six-component force sensor 5-1, a second six-component force sensor 5-2;
one end of the first six-component force sensor 5-1 is connected with one side of the netting frame 7, and the other end of the first six-component force sensor 5-1 is connected with the supporting frame 1;
one end of the second six-component force sensor 5-2 is connected with the other side of the netting frame 7, and the other end of the second six-component force sensor 5-2 is connected with the supporting frame 1;
the netting frame 7 is adapted to move in a lateral flow direction relative to the support frame 1, and the netting frame 7 is adapted to rotate relative to the support frame 1 about an axis parallel to the direction of the netting 8.
The lateral flow direction is the direction perpendicular to the netting 8 in fig. 1.
Further, the rotatable type netting 8 device for researching hydrodynamic force further includes a first connecting rod 6-1, one end of the first connecting rod 6-1 is connected to the side of the netting frame 7 away from the second six-component force sensor 5-2, and the other end of the first connecting rod 6-1 is connected to the end of the first six-component force sensor 5-1 away from the support frame 1.
Further, the rotatable type netting 8 device for researching water power further comprises a second connecting rod 6-2, one end of the second connecting rod 6-2 is connected with one side of the netting frame 7 far away from the first six-component force sensor 5-1, and the other end of the second connecting rod 6-2 is connected with one end of the second six-component force sensor 5-2 far away from the supporting frame 1.
Further, the rotatable netting 8 device for researching hydrodynamic force further comprises a third connecting rod 4-1, one end of the third connecting rod 4-1 is connected with one end of the first six-component force sensor 5-1 far away from the netting frame 7, the other end of the third connecting rod 4-1 is connected with the supporting frame 1, the third connecting rod 4-1 is connected with the supporting frame 1 in a sliding mode along the flow measuring direction, and the third connecting rod 4-1 is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting 8;
the third connecting rod 4-1 is adapted to telescope.
Further, the rotatable netting 8 device for researching hydrodynamic force further comprises a first rotating device 2-1, the first rotating device 2-1 is connected with the third connecting rod 4-1, the first rotating device 2-1 is connected with the supporting frame 1 in a sliding mode along the flow measuring direction, and the first rotating device 2-1 is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting 8.
Further, the rotatable netting 8 device for researching hydrodynamic force further comprises a fourth connecting rod 4-2, one end of the fourth connecting rod 4-2 is connected with one end of the second six-component force sensor 5-2 far away from the netting frame 7, the other end of the fourth connecting rod 4-2 is connected with the supporting frame 1, the fourth connecting rod 4-2 is connected with the supporting frame 1 in a sliding mode along the flow measuring direction, and the fourth connecting rod 4-2 is connected with the supporting frame in a rotating mode around an axis parallel to the direction of the netting 8;
the fourth connecting rod 4-2 is adapted to telescope.
Further, the rotatable netting 8 device for studying hydrodynamic force further comprises a second rotating device 2-2, the second rotating device 2-2 is connected with the third connecting rod 4-1, the second rotating device 2-2 is connected with the supporting frame 1 in a sliding manner along the flow measuring direction, and the second rotating device 2-2 is connected with the supporting frame in a rotating manner around an axis parallel to the direction of the netting 8.
Further, the first connecting rod 6-1, the second connecting rod 6-2, the third connecting rod 4-1 and the fourth connecting rod 4-2 are located on the same straight line, the axis of rotation of the third connecting rod 4-1 relative to the support frame 1 is located on the same straight line, and the axis of rotation of the fourth connecting rod 4-2 relative to the support frame 1 is located on the same straight line.
Further, the rotating device is divided into a top part and a bottom part, the top part is provided with an angle scale and is suitable for indicating the incident flow angle of the netting 8, the first rotating device 2-1 and the second rotating device 2-2 are composed of a plurality of lantern rings, the third connecting rod 4-1 can rotate in the lantern rings, and the lantern rings are fixedly connected with the sliding device 3.
Further, the rotatable netting 8 device for researching the hydrodynamic force further comprises a sliding device 3, wherein the sliding device 3 consists of two main cross beams and a sliding beam, the top and the bottom of the sliding device 3 are respectively provided with one set, the main cross beams are fixedly connected with the supporting frame 1, and the sliding beam is fixed on the main cross beams through bolts which can be screwed down; and/or the presence of a gas in the gas,
the third connecting rod 4-1 is made by nesting a plurality of hollow round rods with the diameters sequentially reduced, the nested round rods can move mutually and are fixed through bolts, the upper end of the third connecting rod 4-1 is provided with an arrow suitable for displaying a rotating angle, and the lower end of the third connecting rod 4-1 is connected with the first six-component force sensor 5-1; and/or the presence of a gas in the gas,
the fourth connecting rod 4-2 is formed by nesting a plurality of hollow round rods with the diameters sequentially reduced, the nested round rods can move mutually and are fixed through bolts, the lower end of the fourth connecting rod 4-2 is provided with an arrow which is suitable for displaying a rotating angle, and the upper end of the fourth connecting rod 4-2 is connected with the second six-component force sensor 5-2; and/or the presence of a gas in the gas,
the first six-component force sensor 5-1 and the second six-component force sensor 5-2 are suitable for measuring stress and bending moment in three directions under the current state; and/or the presence of a gas in the gas,
the netting frame 7 is made of stainless steel, the cross section of the netting frame 7 is streamline to reduce the influence on the surrounding flow state, and the inner side of the netting frame 7 is provided with small holes for fixing the netting 8 and enabling the netting 8 to be in a tensioning state.
In the actual measurement of the structure hydrodynamic force of the netting 8, the whole device is immersed under the water surface, and meanwhile, the force sensors arranged at the upper part and the lower part of the netting 8 and the flow velocity meters arranged at the front part and the rear part of the netting 8 can monitor the flow field and the stress of the netting 8. The device mainly comprises a supporting frame 1, a rotating device, a telescopic rod, a sliding device 3, a six-component force sensor, a connecting rod, a netting frame 7, a netting 8 and the like. The supporting frame 1 can be detached, can be used as a fixed frame of the netting 8 to be placed at the water bottom in a large water tank or an actual water area, and can be detached in a small water tank to only place the inner netting 8 core device in the water tank; the rotating device is connected with the supporting frame 1 through the sliding device 3 and can move on the supporting frame 1 in a one-dimensional mode, the rotating device is composed of a dial scale displaying angles, and an included angle between the plane of the netting 8 and the flow can be accurately set; the telescopic rod is connected with the rotating device and the six-component force sensor and can be used for fixing the netting frames 7 with different sizes through up-down contraction; the six-component force sensor mainly measures the stress of the netting 8; the netting frame 7 is mainly used for fixing the netting 8 and connecting the whole device.
In the device, in the process of measuring the hydrodynamic force of the netting 8 under the action of water flow, based on the modularized and detachable design, the functions of adjustable angle and position are realized, the device can adapt to various working conditions, and the adaptability of a test site is realized by detaching an outer frame; the fixing of the netting frames 7 with different sizes is realized by changing the length of the telescopic rod. The test of the netting 8 can meet more and more test working conditions.
The support frame 1 and the slide 3 are detachable.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A rotatable net device for researching hydrodynamic force is characterized by comprising a supporting frame, a net, a first six-component force sensor and a second six-component force sensor;
one end of the first six-component force sensor is connected with one side of the netting frame, and the other end of the first six-component force sensor is connected with the supporting frame;
one end of the second six-component force sensor is connected with the other side of the netting frame, and the other end of the second six-component force sensor is connected with the supporting frame;
the netting frame is adapted to move in a lateral flow direction relative to the support frame, the netting frame being adapted to rotate relative to the support frame about an axis parallel to the direction of the netting.
2. The rotatable netting device for researching hydrodynamic forces as claimed in claim 1, further comprising a first connecting rod having one end connected to an edge of the netting frame far from the second six-component force sensor, and the other end connected to an end of the first six-component force sensor far from the supporting frame.
3. The rotatable netting apparatus for investigating hydrodynamics according to claim 2, further comprising a second link, one end of the second link being connected to a side of the netting frame remote from the first six-component force sensor, and the other end of the second link being connected to a side of the second six-component force sensor remote from the support frame.
4. The rotatable netting apparatus for researching hydrodynamics of claim 3, further comprising a third connecting rod, one end of the third connecting rod being connected to an end of the first six-component force sensor away from the netting frame, the other end of the third connecting rod being connected to the support frame, the third connecting rod being slidably connected to the support frame along the flow measuring direction, the third connecting rod being rotatably connected to the support frame about an axis parallel to the direction of the netting;
the third connecting rod is suitable for stretching.
5. The rotatable netting apparatus of claim 4, wherein the rotatable netting apparatus further comprises a first rotation device coupled to the third linkage, the first rotation device slidably coupled to the support frame along the lateral flow direction, the first rotation device rotatably coupled to the support frame about an axis parallel to the direction of the netting.
6. The rotatable netting apparatus for researching hydrodynamics of claim 5, further comprising a fourth link, one end of the fourth link being connected to an end of the second sixth force component sensor away from the netting frame, the other end of the fourth link being connected to the support frame, the fourth link being slidably connected to the support frame along the direction of flow measurement, the fourth link being rotatably connected to the support frame about an axis parallel to the direction of the netting;
the fourth connecting rod is suitable for stretching.
7. The rotatable netting device of claim 6, further comprising a second rotation device coupled to the third linkage, the second rotation device slidably coupled to the support frame along the lateral flow direction, the second rotation device rotatably coupled to the support frame about an axis parallel to the direction of the netting.
8. The rotatable tennis apparatus of claim 6, wherein the first, second, third, and fourth connecting bars are positioned in a common line, wherein the axis of rotation of the third connecting bar relative to the support frame is positioned in the common line, and wherein the axis of rotation of the fourth connecting bar relative to the support frame is positioned in the common line.
9. The rotatable netting device of claim 8, wherein the rotating means is divided into a top portion and a bottom portion, the top portion having an angle scale adapted to indicate an angle of attack of the netting, the first rotating means and the second rotating means comprising a plurality of collars, the third link being rotatable within the collars, the collars being fixedly connected to the sliding means.
10. The rotatable netting apparatus for researching hydrodynamics of claim 8, further comprising a sliding device, wherein the sliding device comprises two main beams and a sliding beam, the sliding device is provided with a set of one set at each of the top and bottom, the main beams are fixedly connected with the supporting frame, and the sliding beam is fixed on the main beams through bolts which can be screwed; and/or the presence of a gas in the gas,
the third connecting rod is formed by nesting a plurality of hollow round rods with the diameters sequentially reduced, the nested round rods can move mutually and are fixed through bolts, the upper end of the third connecting rod is provided with an arrow suitable for displaying a rotating angle, and the lower end of the third connecting rod is connected with the first six-component force sensor; and/or the presence of a gas in the gas,
the fourth connecting rod is formed by nesting a plurality of hollow round rods with the diameters sequentially reduced, the nested round rods can move mutually and are fixed through bolts, the lower end of the fourth connecting rod is provided with an arrow suitable for displaying a rotating angle, and the upper end of the fourth connecting rod is connected with the second six-component force sensor; and/or the presence of a gas in the gas,
the first six-component force sensor and the second six-component force sensor are suitable for measuring stress and bending moment in three directions under the current state; and/or the presence of a gas in the gas,
the netting frame is made of stainless steel, the cross section of the netting frame is streamline to reduce the influence on the surrounding flow state, and the inner side of the netting frame is provided with small holes for fixing the netting and enabling the netting to be in a tensioning state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210611954.0A CN114847206B (en) | 2022-05-31 | 2022-05-31 | Rotatable netting device for studying hydrodynamic force |
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| CN202210611954.0A CN114847206B (en) | 2022-05-31 | 2022-05-31 | Rotatable netting device for studying hydrodynamic force |
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| CN114847206B (en) | 2024-01-12 |
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