CN107484450A - A kind of bionical multiple dimensioned convex closure structure based on fractal theory - Google Patents
A kind of bionical multiple dimensioned convex closure structure based on fractal theory Download PDFInfo
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- CN107484450A CN107484450A CN201710532095.5A CN201710532095A CN107484450A CN 107484450 A CN107484450 A CN 107484450A CN 201710532095 A CN201710532095 A CN 201710532095A CN 107484450 A CN107484450 A CN 107484450A
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- convex closure
- yardstick
- grade
- multiple dimensioned
- soil
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- 239000002689 soil Substances 0.000 claims abstract description 30
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 4
- 230000003592 biomimetic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001710 laterite Inorganic materials 0.000 description 2
- 239000011504 laterite Substances 0.000 description 2
- 239000011664 nicotinic acid Substances 0.000 description 2
- 238000003971 tillage Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The present invention relates to a kind of bionical multiple dimensioned convex closure structure based on fractal theory, belong to technical field of agricultural mechanical equipment.Convex closure structure of the present invention according to fractal dimension with multiple dimensioned formal distribution on clayed soil machinery soil-engaging component surface, be arranged in array.Bionical multiple dimensioned convex closure structure of the invention based on fractal theory, for clayed soil equipment soil-engaging component surface, under the ability of the anti-sticking drag reduction of original convex closure, the ability of anti-sticking drag reduction is further enhanced so that agricultural tool being capable of the more preferable operation in clayed soil region.Bionical multiple dimensioned convex closure based on fractal theory, it can reduce frictional force for the larger soil of viscosity, reduce resistance, on the premise of operation quality is ensured, reduce energy loss, saved production cost.
Description
Technical field
The present invention relates to a kind of bionical multiple dimensioned convex closure structure based on fractal theory, and soil is touched suitable for clayed soil machinery
Parts surface geometry, belongs to technical field of agricultural mechanical equipment.
Background technology
In modern agriculture equipment Prepared for Touching-soil Components of Terrain Machinery and soil contact process, anti-sticking drag reduction is always scientific and technical personnel
To the research direction of Prepared for Touching-soil Components of Terrain Machinery.When soil contacts with Prepared for Touching-soil Components of Terrain Machinery, can produce adhesion and
Serious adhesion can be produced and accumulate phenomenon.In the process, serious frictional force can produce very big resistance, have a strong impact on machinery
Operating efficiency, it is therefore desirable to reduce resistance and frictional force as far as possible.
In research for modern dry land agricultural tool soil-engaging component, it was found that the surface geometry knot of a variety of soil animals
Structure, it is to have certain geometric units body regularly or be randomly distributed on body surface relevant position the characteristics of these structures.Pass through
Research to these convex closure geometries.Bionic, non-smooth body structure surface agricultural tool soil-engaging component is designed, is realized good
Anti-adhesion performance, resistance and frictional force are reduced, good popularization is obtained in modern agricultural production.
In dry land agricultural tool antiseepage research, convex closure structure has obtained good utilization on soil-engaging component, has certain
Anti-sticking drag-reduction effect.But for clayed soil, the soil of partial moisture be present, especially southern laterite, viscosity is heavier, during operation
Resistance is big, and operation consumption power height is, it is necessary to improve the performance of the anti-sticking drag reduction of agricultural tool.
The currently known agricultural tool soil-engaging component using bionical convex closure structure achieves significantly in dry land operation
Operation effectiveness, still, in actual popularization, the vast clayed soil region in China, there is the restriction effect of a bit, especially upper south
Laterite earth, composition is different, and the requirement of anti-sticking drag reduction is different.According to above mentioned problem, it is necessary to which optimization agricultural machinery and implement touch to a certain extent
The bionic geometric structure form of native parts surface, strengthen the ability of its anti-sticking drag reduction, so that in the vast cohesive soil territory in China
Area is promoted use.
The content of the invention
The invention provides a kind of bionical multiple dimensioned convex closure structure based on fractal theory, for overcoming clayed soil to touch soil
The problem of part adhesion is big, resistance is big, high energy consumption.
The technical scheme is that：A kind of bionical multiple dimensioned convex closure structure based on fractal theory, convex closure structure according to
Fractal dimension D on clayed soil machinery soil-engaging component surface, is arranged in array with the formal distribution of n yardsticks.
Thei+ 1 grade of yardstick convex closure is distributed iniThe H of level yardstick convex closure i Place, H i =2/3R i (i=1,2 ..n-1), R i+1=DR i
(i=1,2 ..n-1), R1It is 15mm to 30mm for the 1st grade of yardstick convex closure radius and value；H i Fori+ 1 grade of yardstick convex closure isi
Position on level yardstick convex closure, R i+1Fori+ 1 grade of yardstick convex closure radius.
The fractal dimension D determines according to topological dimension.
Distance L between the 1st grade of convex closure of yardstick two0It can take：L0=17.5 mm, 20 mm or 22.5 mm.
The n values are 2 to 5.
When n values are 3, angle α is 0 ° to 90 ° between the 2nd grade of convex closure of yardstick two, is pressed from both sides between the convex closure of 3rd level yardstick two
Angle beta is 30 ° to 90 °.
The beneficial effects of the invention are as follows：Bionical multiple dimensioned convex closure structure of the invention based on fractal theory, for cohesive soil
Earth equipment soil-engaging component surface, under the ability of the anti-sticking drag reduction of original convex closure, further enhances the ability of anti-sticking drag reduction so that agriculture
Industry equipment being capable of the more preferable operation in clayed soil region.Bionical multiple dimensioned convex closure based on fractal theory, can be for viscosity
Larger soil, frictional force is reduced, reduce resistance, on the premise of operation quality is ensured, reduce energy loss, saved life
Produce cost.The used bionical multiple dimensioned convex closure based on fractal theory, by conventional conventional process tools and technique, based on existing
There are the further machining processes of China's machinery industry standard, for clayed soil equipment soil-engaging component surface, it is easy to accomplish and
The ability of anti-sticking drag reduction is greatly strengthen, is easy to promote the use of in the range of the most of clayed soil in the whole nation.
Brief description of the drawings
Fig. 1 is structure front view of the present invention；
Fig. 2 is structural side view of the present invention；
Fig. 3 is structure top view of the present invention；
Fig. 4 is the rough schematic that structure of the present invention is applied on micro computer paddy field rotary tillage knife face；
Fig. 5 is the close-up schematic view for the rough schematic that structure of the present invention is applied on micro computer paddy field rotary tillage knife face；
Fig. 6 is the rough schematic that structure of the present invention is applied on the mouldboard of paddy field.
Embodiment
With reference to the accompanying drawings and examples, the invention will be further described, but present disclosure be not limited to it is described
Scope.
Embodiment 1：As shown in figures 1 to 6, a kind of bionical multiple dimensioned convex closure structure based on fractal theory, is managed based on a point shape
By convex closure structure is according to fractal dimension D=ln2/ln3=0.631 with the formal distribution of 2 yardsticks in clayed soil machinery soil-engaging component
Surface, it is arranged in array.
2nd grade of yardstick convex closure is distributed in the H of the 1st grade of yardstick convex closure1Place, H1=2/3R1, R1The mm of value 15 to 30 mm；H1For
The 2nd grade of hemispheroidal centre of sphere of yardstick convex closure is to the 1st grade of hemispheroidal centre of sphere of yardstick convex closure to the 1st grade of hemispheroidal side of yardstick convex closure
The vertical range of the end points line of view radius.
The distance between 1st grade of convex closure of yardstick two L0 =17.5 mm。
Embodiment 2：As shown in figures 1 to 6, a kind of bionical multiple dimensioned convex closure structure based on fractal theory, is managed based on a point shape
By convex closure structure is according to fractal dimension D=ln2/ln3=0.631 with the formal distribution of 3 yardsticks in clayed soil machinery soil-engaging component
Surface, it is arranged in array.
2nd grade of yardstick convex closure is distributed in the H of the 1st grade of yardstick convex closure1Place, it is convex that 3rd level yardstick convex closure is distributed in the 2nd grade of yardstick
Wrap H2Place, H2=2/3 R2, H1=2/3 R1；1st grade of yardstick convex closure radius R1For 15 mm to 30 mm；2nd grade of yardstick convex closure radius
R2=D R1；3rd level yardstick convex closure radius R3=D R2；Angle α is 0 ° to 90 ° between the 2nd grade of described convex closure of yardstick two；3rd level
Angle β is 30 ° to 90 ° between the convex closure of yardstick two；2nd grade of yardstick convex closure angle γ=90 on the 1st grade of yardstick convex closure-1/2α；
Distance L between the 1st grade of convex closure of yardstick two0=20mm。
As shown in Fig. 2 the 2nd grade of yardstick convex closure is distributed in the H of the 1st grade of yardstick convex closure1For O1To OA distance, 3rd level yardstick
Convex closure is distributed in the H of the 2nd grade of yardstick convex closure2For O2To O3C distance, the 1st grade of scale biomimetic convex closure structure R1For the 1st grade of yardstick
Convex closure radius, the 2nd grade of scale biomimetic convex closure structure R2For the 2nd grade of yardstick convex closure radius, 3rd level scale biomimetic convex closure structure R3For
3rd level yardstick convex closure radius, angle α is OA between the described the 2nd grade of convex closure of yardstick two1Side and OA2Side angle, 3rd level yardstick two
Angle β is O between convex closure1B1Side and O1B2Side angle, the 2nd grade of yardstick convex closure angle γ on the 1st grade of yardstick convex closure is OA1Side with
OA sides angle；
Wherein, point O is the 1st grade of hemispheroidal centre of sphere of yardstick convex closure, point O1And O3For the 2nd grade of hemispheroidal centre of sphere of yardstick convex closure,
Point O2For the hemispheroidal centre of sphere of 3rd level yardstick convex closure, point A is the end points of the 1st grade of hemispheroidal side view radius of yardstick convex closure, point
A1、A2Respectively OO1、OO3Extended line and the 2nd grade of hemispheroidal intersection point of yardstick convex closure, point B1、B2Respectively cross the 2nd grade of yardstick,
The hemispheroidal centre of sphere extended line of 3 grades of yardstick convex closures and the hemispheroidal intersection point of 3rd level yardstick convex closure, point C are the 2nd grade of yardstick convex closure half
The end points of the side view radius of spheroid.
Embodiment 3：As shown in figures 1 to 6, a kind of bionical multiple dimensioned convex closure structure based on fractal theory, is managed based on a point shape
By convex closure structure is according to fractal dimension D=ln2/ln3=0.631 with the formal distribution of 4 yardsticks in clayed soil machinery soil-engaging component
Surface, it is arranged in array.
2nd grade of yardstick convex closure is distributed in the H of the 1st grade of yardstick convex closure1Place, H1=2/3R1, 3rd level yardstick convex closure is distributed in the 2nd
The H of level yardstick convex closure2Place, H2=2/3R2, the 4th grade of yardstick convex closure be distributed in the H of 3rd level yardstick convex closure3Place, H3=2/3R3, R1Take
The mm of value 15 is to 30 mm, R2=DR1, R3=DR2, R4=DR3；H i （i=1,2,3）Fori+ 1 grade of hemispheroidal centre of sphere of yardstick convex closure arrives
TheiThe level hemispheroidal centre of sphere of yardstick convex closure is to theiLevel the hemispheroidal side view radius of yardstick convex closure end points line it is vertical away from
From R i （i=1,2,3,4）ForiLevel yardstick convex closure radius.
The distance between 1st grade of convex closure of yardstick two L0 =22.5 mm。
Embodiment 4：As shown in figures 1 to 6, a kind of bionical multiple dimensioned convex closure structure based on fractal theory, is managed based on a point shape
By convex closure structure is according to fractal dimension D=ln2/ln3=0.631 with the formal distribution of 5 yardsticks in clayed soil machinery soil-engaging component
Surface, it is arranged in array.
2nd grade of yardstick convex closure is distributed in the H of the 1st grade of yardstick convex closure1Place, H1=2/3R1, 3rd level yardstick convex closure is distributed in the 2nd
The H of level yardstick convex closure2Place, H2=2/3R2, the 4th grade of yardstick convex closure be distributed in the H of 3rd level yardstick convex closure3Place, H3=2/3R3, the 5th grade
Yardstick convex closure is distributed in the H of the 4th grade of yardstick convex closure4Place, H4=2/3R4, R1The mm of value 15 is to 30 mm, R2=DR1, R3=DR2, R4=
DR3, R5=DR4；H i （i=1,2,3,4）Fori+ 1 grade of hemispheroidal centre of sphere of yardstick convex closure is toiThe level hemispheroidal ball of yardstick convex closure
The heart is toiThe vertical range of the end points line of the level hemispheroidal side view radius of yardstick convex closure, R i （i=1,2,3,4,5）Fori
Level yardstick convex closure radius.
The distance between 1st grade of convex closure of yardstick two L0 =20 mm。
Multiple dimensioned convex closure geometry feature is in embodiment：Convex closure is in multiple dimensioned distribution, and each yardstick convex closure position is close,
It is stronger to act on anti-sticking drag reduction effect during soil；Convex closure yardstick uses three-level, it is easy to accomplish processing；Multiple dimensioned form can be reduced
First yardstick convex closure quantity, it is cost-effective.
Above in conjunction with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (6)
- A kind of 1. bionical multiple dimensioned convex closure structure based on fractal theory, it is characterised in that：Convex closure structure according to fractal dimension D with The formal distribution of n yardsticks is arranged in array on clayed soil machinery soil-engaging component surface.
- 2. the bionical multiple dimensioned convex closure structure according to claim 1 based on fractal theory, it is characterised in that：Thei+ 1 grade Yardstick convex closure is distributed iniThe H of level yardstick convex closure i Place, H i =2/3R i (i=1,2 ..n-1), R i+1=DR i (i=1,2 ..n-1), R1It is 15mm to 30mm for the 1st grade of yardstick convex closure radius and value；H i Fori+ 1 grade of yardstick convex closure isiOn level yardstick convex closure Position, R i+1Fori+ 1 grade of yardstick convex closure radius.
- 3. the bionical multiple dimensioned convex closure structure according to claim 1 based on fractal theory, it is characterised in that：Described point of shape Dimension D determines according to topological dimension.
- 4. the bionical multiple dimensioned convex closure structure according to claim 1 based on fractal theory, it is characterised in that：1st grade of chi Spend distance L between two convex closures0It can take：L0=17.5 mm, 20 mm or 22.5 mm.
- 5. the bionical multiple dimensioned convex closure structure according to claim 1 based on fractal theory, it is characterised in that：The n takes It is worth for 2 to 5.
- 6. the bionical multiple dimensioned convex closure structure according to claim 5 based on fractal theory, it is characterised in that：When n values For 3 when, angle α is 0 ° to 90 ° between the 2nd grade of convex closure of yardstick two, and angle β is 30 ° to 90 ° between the convex closure of 3rd level yardstick two.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108357665A (en) * | 2017-12-29 | 2018-08-03 | 西北工业大学 | A kind of imitative longitudinal dune pneumatic drag reduction divides shape micro-nano structure |
| CN109121478A (en) * | 2018-09-10 | 2019-01-04 | 山东理工大学 | Sand dune profiling based on soil insect can be changed disc plough blade |
| CN109168335A (en) * | 2018-09-10 | 2019-01-11 | 山东理工大学 | Sand dune profiling based on soil insect can be changed Rotary tillage blade |
| CN109257962A (en) * | 2018-09-10 | 2019-01-25 | 山东理工大学 | Sand dune profiling based on soil insect can be changed mouldboard plow plough body |
| CN109451884A (en) * | 2018-12-19 | 2019-03-12 | 昆明理工大学 | A kind of bionical rolling rake based on soil bio-characteristics |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109257962A (en) * | 2018-09-10 | 2019-01-25 | 山东理工大学 | Sand dune profiling based on soil insect can be changed mouldboard plow plough body |
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