CN203840742U - Bionic surface drag reduction structure of paddy field boat type machine - Google Patents
Bionic surface drag reduction structure of paddy field boat type machine Download PDFInfo
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- CN203840742U CN203840742U CN201420091619.3U CN201420091619U CN203840742U CN 203840742 U CN203840742 U CN 203840742U CN 201420091619 U CN201420091619 U CN 201420091619U CN 203840742 U CN203840742 U CN 203840742U
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- paddy field
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- drag reduction
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Abstract
The utility model discloses a bionic surface drag reduction structure of a paddy field boat type machine, which simulates abdomen epidermis patterns of amphibian reptiles. Mutually-communicated groove networks are distributed on the outer surface of a boat body contacted with a paddy field mud surface; when the boat body walks at low speed, a water film is formed on the outer surface of the boat body so as to reduce the resistance when the paddy field boat type machine walks at low speed. The adhesive force and the friction force between the surface of the boat body and the mud surface are used for continuously supplementing the consumption for forming the water film by water at the outer side of the boat body along communicated grooves and the water film is continuously formed, so that the resistance when the boat body moves is reduced. The bionic surface drag reduction structure is low in cost and is also suitable for boat type machines for environments including intertidal zones, marshes and the like.
Description
Technical field
The utility model relates to agricultural mechanical field, particularly a kind of paddy field boat type machine bionic surface drag reduction structure.
Background technology
In machines working in paddy field, a large amount of paddy field boat type machines that use carry and walk at present, mainly comprise single hull and multiple hull: single hull is as rice transplanter, and rice transplanting mechanism is carried by a hull; Multiple hull is as step transplanter, and rice transplanting mechanism is shared weight by two hulls.The hull of paddy field boat type machine mainly plays the effect of load capacity, and the general smoother of hull outer surface, to reduce the resistance in walking process.But, when paddy field boat type machine there will be the resistance while walking much larger than fair speed when walking in paddy field compared with low velocity, this is due to hull load-bearing, and hull can arrange the ponding of mud face in paddy field, make hull smooth outer surface and mud face close contact, produced larger adhesive force.In practical operation, the speed of travel of paddy field boat type machine is generally slower, thereby causes its resistance problem of walking in paddy field very serious.Bionic surface drag reduction technology is the focus of research in recent years, and its application mainly concentrates on the media such as air, water and general soil, and because paddy field is mud or mud mixture, its physical characteristic complexity, is not applied to the correlative study of bionic surface drag reduction in paddy field at present.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming existing in prior art, and a kind of paddy field boat type machine bionic surface drag reduction structure is provided, and can realize the walking resistance when reducing paddy field boat type machine and advancing compared with low speed in paddy field.
The purpose of this utility model is achieved through the following technical solutions:
A kind of paddy field boat type machine bionic surface drag reduction structure, is the abdominal skin lines of bionic amphibious class reptile, is distributed with the groove network of mutual UNICOM on the hull outer surface contacting with paddy field mud face.
In described groove network, the slot opening of groove 1 is 1～40mm, and the degree of depth is 5～50mm; The shape of cross section of groove 1 can be rectangle, trapezoidal, inverted trapezoidal, triangle, arc, monolateral trapezoidal, monolateral triangle, but shape is not limited to this, for example other polygon and multiterminal arc etc.
In described groove network, the shape of single grid is staggered rectangle, parallelogram or imitative moire hexagon preferably; The shape area of single grid is 1～1000cm
2, according to hull size, surfacing take different mesh shape and areas different from paddy field mud surface properties; Whole groove network is communicated with.
The utility model is also provided with and initiatively supplements groove water system, the hull front end that is paddy field boat type machine is provided with one or more water jets 2, mechanically be provided with water tank and pressure apparatus 3 in paddy field boat form, water tank and pressure apparatus 3 pass through inner passage force feed to water jet 2 by Water in Water Tank, when hull advances, can supplement groove water.
Water jet 2 can also be installed in the groove of paddy field boat type machine 1; The lower end of water jet 2 and groove 1 UNICOM, upper end is connected with high-pressure water pipe 9 is airtight; The high-pressure water pipe airtight connection water tank of 9 other end and pressure apparatus 3.When use, water tank and pressure apparatus 3 produce high pressure, and Water in Water Tank is transported to water jet 2 by high-pressure water pipe 9, supplement the consumption of hull 10 groove water in the time advancing, and produce continuous moisture film.
Above-mentioned paddy field boat type machine bionic surface drag reduction structure, is applied to the outer surface of the boat type machine in paddy field, beach, marsh.
Principle of the present utility model is: (1) paddy field boat type machine when in paddy field, low speed is advanced resistance larger: position relationship is as shown in Figure 1 in paddy field for hull, on the mud layer 5 in paddy field, there is the continuous or discrete water layer 4 that one deck is more shallow, the paddy field hull machinery of general smooth surface is static or during compared with low cruise on the mud layer 5 in paddy field, due to hull carrying fuselage gravity, between hull outer surface and mud face, produce larger pressure, hull arranges water layer 4, but hull is less at water layer 4 displacement of volumes, do not produce enough buoyancy, hull must rely on mud layer 5 to support fuselage weight, this makes hull surface and mud layer 5 close contacts, produce very large adhesive force, while causing paddy field boat type machine by static startup or low cruise, resistance is larger.(2) bionic surface drag reduction structure of the present utility model can form moisture film at hull outer surface, thereby reduce the running resistance of hull in the time of low speed: as shown in Figure 5, in the time that hull outer surface 6 and mud layer 5 push, because mud layer 5 exists tension force, the residual a part of groove water 7 of the interior meeting of groove 1, groove water 7 is by groove network and hull water layer UNICOM around; When hull low cruise, along with the slip between hull outer surface 6 and mud layer 5, groove water 7 can be taken out of, is attached to comparatively equably between hull outer surface 6 and mud layer 5, forms moisture film 8; Figure 6 shows that local hull surface groove network produces moisture film principle schematic, solid arrow is water enters groove 1 direction from hull front and side, dotted arrow produces the direction of moisture film 8 when to be groove water 7 slide with hull outer surface 6 and mud face 9, moisture film 8 is attached on hull outer surface 6 uniformly; Due to groove network UNICOM, in forming moisture film 8, the interior generation negative pressure of groove 1, the water layer in hull outside can constantly enter by groove network, the consumption that supplements groove water 7 while producing moisture film 8 can produce continuous moisture film 8, thereby reduce the running resistance of hull in the time of hull low cruise.(3) the utility model is also provided with and initiatively supplements groove water system, guarantee the formation of moisture film: in the time that water level in paddy field is interrupted or the water yield is less, make hull outside can not effectively supplement groove water, can affect the continuous formation of moisture film 8, cause the problem that running resistance is larger, the utility model is installed water jet 2 in hull front end or groove, carries out initiatively moisturizing to guarantee the formation of moisture film.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
(1) principle of the present utility model and structure are different from current paddy field boat form mechanical surface, have solved the large problem of running resistance when compared with low cruise.
(2) cost of the present utility model is low, is also applicable to the boat type machine of the environment such as beach, marsh.
Brief description of the drawings
Fig. 1 is hull water layer and mud layer position view on paddy field
Fig. 2 is the groove network schematic diagram of a kind of rectangular mesh of the present utility model.
Fig. 3 is the groove network schematic diagram of a kind of parallelogram mesh of the present utility model.
Fig. 4 is the groove network schematic diagram of a kind of hexagonal mesh of the present utility model.
Fig. 5 is that bionic surface drag reduction structure of the present utility model forms moisture film principle schematic.
Fig. 6 is groove network water (flow) direction schematic diagram.
Fig. 7 is that a kind of groove cross section is the schematic diagram of rectangle.
Fig. 8 is that a kind of groove cross section is trapezoidal schematic diagram.
Fig. 9 is that a kind of groove cross section is the schematic diagram of inverted trapezoidal.
Figure 10 is that a kind of groove cross section is leg-of-mutton schematic diagram.
Figure 11 is that a kind of groove cross section is the schematic diagram of arc.
Figure 12 is that a kind of groove cross section is monolateral trapezoidal schematic diagram.
Figure 13 is that a kind of groove cross section is monolateral leg-of-mutton schematic diagram.
Figure 14 is the principle schematic that multiple water jets are installed in hull bottom surface.
Figure 15 initiatively supplements groove water system schematic diagram.
Figure 16 is many decks of boat hand-held transplanter running resistance and length velocity relation figure in test paddy field of test case 1.
Figure 17 is test vessel plate A and test deck of boat B resistance versus datagram under the same conditions in test case 2.
Wherein, 1, groove; 2, water jet; 3, water tank and pressure apparatus; 4, water layer; 5, mud layer; 6, hull outer surface; 7, groove water; 8, moisture film; 9, high-pressure water pipe; 10, hull.
Embodiment
Below in conjunction with embodiment, the utility model is done to further detailed description, but embodiment of the present utility model is not limited to this.
Embodiment 1
Paddy field boat type machine bionic surface drag reduction structure, is the abdominal skin lines of bionic amphibious class reptile, is distributed with the groove network of mutual UNICOM on the hull outer surface contacting with paddy field mud face.In groove network, the slot opening of groove 1 is 1～40mm, and the degree of depth is 5～50mm; The shape of cross section of groove 1 can be rectangle (as shown in Figure 7), trapezoidal (as shown in Figure 8), inverted trapezoidal (as shown in Figure 9), triangle (as shown in figure 10), arc (as shown in figure 11), monolateral trapezoidal (as shown in figure 12), monolateral triangle (as shown in figure 13), but shape is not limited to this, for example other polygon and multiterminal arc etc.In groove network, the shape of single grid is staggered rectangle (as shown in Figure 2), parallelogram (as shown in Figure 3) or imitative moire hexagon (as shown in Figure 4) preferably, and the shape area of single grid is 1～1000cm
2, according to hull size, surfacing take different mesh shape and areas different from paddy field mud surface properties.
For guaranteeing formation and the maintenance of moisture film, the utility model has also designed and has initiatively supplemented groove water system.The hull front end of paddy field boat type machine is provided with one or more water jets 2, is mechanically provided with water tank and pressure apparatus 3 in paddy field boat form, and water tank and pressure apparatus 3 pass through inner passage force feed to water jet 2 by Water in Water Tank, when hull advances, can supplement groove water.Can also water jet 2 be installed in the groove of paddy field boat type machine 1, as shown in figure 14; The lower end of water jet 2 and groove 1 UNICOM, upper end is connected with high-pressure water pipe 9 is airtight, as shown in figure 15; The high-pressure water pipe airtight connection water tank of 9 other end and pressure apparatus 3.When use, water tank and pressure apparatus 3 produce high pressure, and Water in Water Tank is transported to water jet 2 by high-pressure water pipe 9, supplement the consumption of hull 10 groove water in the time advancing, and produce continuous moisture film.
Test case 1: the resistance experiment of many decks of boat hand-held transplanter of smooth outer surface
Adopt the hand-held four lines automatic rice transplanter A buying on market, this type deadweight 175kg, two water wheels and 3 deck of boat structures, the smooth outer surface of the deck of boat.The pulling test of carrying out this many decks of boat rice transplanter in laboratory, obtains the drag data under friction speed, as shown in figure 16.Within the scope of test speed, when low speed, the resistance of this rice transplanter is larger, and in the time that speed reaches 0.3m/s left and right, resistance falls suddenly, and resistance increases and slowly increases with speed afterwards.Visible, when the paddy field boat type machine of smooth outer surface moves on mud face, only have in the time that speed reaches certain value, it is resistance and velocity correlation that resistance just meets traditional rule; But in low speed situation, owing to cannot forming moisture film, in hull and paddy field, the adhesiveness of mud face increases, and makes resistance have particularity and becomes very large.
Test case 2: be distributed with the test hull B of the utility model bionic surface drag reduction structure and the test of the mud face resistance versus of general ganoid test hull A.
(1) paddy field environmental parameter is: the dark 20cm of mud pin, mud face is smooth, water layer 2-5cm, clay shale.
(2) contrast sample: the test hull A of smooth outer surface is 13.5kg after counterweight, and length, width and height are 50cm × 50cm × 2cm.
Test specimens: the test hull B that is distributed with the utility model bionic surface drag reduction structure, after counterweight, be 13.5kg, length, width and height are 50cm × 50cm × 2cm, are processed with groove network at its outside table, bottom surface is divided into staggered rectangle by groove network, and single mesh shape area is 10cm × 10cm; Groove cross section is rectangle, wide 5mm, high 10mm.
(3) testing equipment has: pulling force sensor, range 20kg, precision 0.1kg; Speed change draw-gear, space rate scope 0.02-0.5m/s; Laser velocimeter rangefinder; Other aids, as thin steel rope, fixed support and video camera etc.
(4) gait of march is got 0.05m/s and two kinds of lower velocity amplitudes of 0.1m/s, to verify that moisture film is to affect the hull principal element of running resistance and actual effect of groove network on mud face.
(5) under every kind of speed, alternately measure respectively the value of thrust of testing hull A and test hull B for 3 times, finally average as this speed pontoon running resistance value, result as shown in figure 17.
Test data shows, smooth surface hull is greater than groove network deck of boat running resistance in test speed scope internal resistance entirety, visible, the resistance that adopts bionic surface drag reduction structure of the present utility model can significantly reduce hull when low speed is advanced in paddy field.
Claims (8)
1. a paddy field boat type machine bionic surface drag reduction structure, is characterized in that: be the abdominal skin lines of bionic amphibious class reptile, be distributed with the groove network of mutual UNICOM on the hull outer surface contacting with paddy field mud face.
2. paddy field according to claim 1 boat type machine bionic surface drag reduction structure, is characterized in that: in described groove network, the slot opening of groove is 1～40mm, and the degree of depth is 5～50mm.
3. paddy field according to claim 1 boat type machine bionic surface drag reduction structure, is characterized in that: in described groove network, the shape of cross section of groove is rectangle, trapezoidal, inverted trapezoidal, triangle, arc, monolateral trapezoidal or monolateral triangle.
4. paddy field according to claim 1 boat type machine bionic surface drag reduction structure, is characterized in that: in described groove network, single grid be shaped as staggered rectangle, parallelogram or imitative moire hexagon.
5. paddy field according to claim 1 boat type machine bionic surface drag reduction structure, is characterized in that: in described groove network, the shape area of single grid is 1～1000cm
2.
6. paddy field according to claim 1 boat type machine bionic surface drag reduction structure, is characterized in that: be provided with and initiatively supplement groove water system.
7. paddy field according to claim 6 boat type machine bionic surface drag reduction structure, it is characterized in that: the described groove water system that initiatively supplements,, at the hull front end of paddy field boat type machine, one or more water jets are installed, mechanically be provided with water tank and pressure apparatus in paddy field boat form, water tank and pressure apparatus pass through inner passage force feed to water jet by Water in Water Tank, when hull advances, can supplement groove water.
8. according to the paddy field boat type machine bionic surface drag reduction structure described in claim 6 or 7, it is characterized in that: the described groove water system that initiatively supplements is that water jet is installed in groove; The lower end of water jet and groove UNICOM, upper end is connected with high-pressure water pipe is airtight; The airtight connection water tank of the other end and the pressure apparatus of high-pressure water pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420091619.3U CN203840742U (en) | 2014-02-28 | 2014-02-28 | Bionic surface drag reduction structure of paddy field boat type machine |
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| CN201420091619.3U CN203840742U (en) | 2014-02-28 | 2014-02-28 | Bionic surface drag reduction structure of paddy field boat type machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103843507A (en) * | 2014-02-28 | 2014-06-11 | 华南农业大学 | Paddy field boat form machine bionic surface anti-drag structure and applications thereof |
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2014
- 2014-02-28 CN CN201420091619.3U patent/CN203840742U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103843507A (en) * | 2014-02-28 | 2014-06-11 | 华南农业大学 | Paddy field boat form machine bionic surface anti-drag structure and applications thereof |
| CN103843507B (en) * | 2014-02-28 | 2016-09-07 | 华南农业大学 | A kind of paddy field boat type machine bionic surface drag reduction structures and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140924 Effective date of abandoning: 20160907 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |