CN109570019B - Anti-erosion sieve plate of corn harvester - Google Patents
Anti-erosion sieve plate of corn harvester Download PDFInfo
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- CN109570019B CN109570019B CN201910093664.XA CN201910093664A CN109570019B CN 109570019 B CN109570019 B CN 109570019B CN 201910093664 A CN201910093664 A CN 201910093664A CN 109570019 B CN109570019 B CN 109570019B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4663—Multi-layer screening surfaces
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- Combined Means For Separation Of Solids (AREA)
Abstract
The invention belongs to the technical field of agricultural machinery, and particularly relates to an erosion-resistant corn harvester sieve plate which comprises an upper layer, a middle layer and a lower layer; wherein the upper layer and the lower layer have the same structure and material; the upper layer, the middle layer and the lower layer are glued; a plurality of screen holes penetrating through the upper layer, the middle layer and the lower layer; the surface of the upper layer is provided with a binary coupling bionic convex hull structure. The upper layer and the lower layer are both metal plates; the middle layer is a rubber plate made of rubber materials. The thicknesses of the upper layer and the lower layer are both 1mm-3 mm; the thickness of the middle layer is 2mm-5 mm. The thicknesses of the upper layer and the lower layer are both 1.5 mm; the thickness of the middle layer is 3 mm. The sieve plate provided by the invention has the advantages of excellent erosion resistance, simple structure, reduced kernel damage rate and the like.
Description
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to an erosion-resistant sieve plate of a corn harvester.
Background
The corn harvester is an agricultural machine which can complete multiple operations of ear picking, stacking, stalk returning once and the like on the corn once by using a machine when the corn is ripe. China is a big agricultural country, particularly a big corn planting country, so the application of the corn harvester is very common. The cleaning device is an important component of the corn harvester, and corn grains are separated through carrying of impurities by a wind field and screening of a vibrating screen. However, in the separation process, due to the high-speed vibration of the vibrating screen, the sieve plate is eroded and abraded by the impurity particles under the action of the wind field. After a long time of harvesting operation, the sieve plate of the cleaning device needs to be replaced, the cost during the harvesting operation is increased, and the progress of agricultural mechanization is hindered.
At present, a sieve plate of a cleaning device of a corn harvester is generally made of a metal sieve, so that the processing cost is high and the weight of the whole machine is heavier. Polyurethane rubber sieves are used in the mining industry, and although the elastic modulus of polyurethane rubber is large, erosion abrasion still occurs after long-time operation, so that the separation efficiency is influenced.
Through the retrieval, chinese utility model patent application No. 201320204718.3 has authorized "a wear-resisting sieve plate", and this sieve includes antifriction plate and base plate, and the antifriction plate sets firmly at the base plate upper surface, is equipped with the sieve mesh that link up antifriction plate and base plate on the sieve, the shape on sieve mesh surface is the irregular shape that both ends size is inconsistent.
Chinese utility model patent application No. 201620039838.6 authorizes "a wear-resisting sieve", and this sieve includes the sieve main part and sets up a plurality of sieve meshes in the sieve main part, the sieve main part includes the steel sheet and connects the wearing layer that forms by the build-up welding of wear-resisting material on the steel sheet upper surface, and each sieve mesh runs through the steel sheet and the wearing layer of sieve main part, and the aperture crescent formation tapering by the sieve mesh of wearing layer upper surface to steel sheet lower surface.
The sieve plate structure has a wear-resistant effect to a certain extent, but has the defects of complex processing and higher production cost.
Disclosure of Invention
Technical problem to be solved
Aiming at the technical problems in the prior art, the invention provides an anti-erosion corn harvester sieve plate, which solves the technical problems of poor anti-erosion performance, complex structure and the like of the corn harvester sieve plate in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
an erosion-resistant corn harvester sieve plate comprises an upper layer, a middle layer and a lower layer;
wherein the upper layer and the lower layer have the same structure and material;
the upper layer, the middle layer and the lower layer are glued;
a plurality of screen holes penetrating through the upper layer, the middle layer and the lower layer;
the surface of the upper layer is provided with a binary coupling bionic convex hull structure.
Preferably, the upper layer and the lower layer are both metal plates;
the middle layer is a rubber plate made of rubber materials.
Preferably, the thickness of the upper layer and the lower layer is 1mm-3 mm;
the thickness of the middle layer is 2mm-5 mm.
Preferably, the thickness of the upper layer and the lower layer is 1.5 mm;
the thickness of the middle layer is 3 mm.
Preferably, the binary coupling bionic convex hull structure is a hemisphere;
the radius of the hemispheroid is 0.5mm-1.5 mm;
the gap between adjacent hemispheres is 1mm-3 mm.
Preferably, the radius of the hemisphere is 1 mm;
the gap between adjacent hemispheres was 2 mm.
Preferably, the diameter of the sieve holes is 5mm-15 mm;
the gap between adjacent sieve holes is 5mm-15 mm.
Preferably, the diameter of the sieve holes is 10 mm;
the gap between adjacent screen holes is 10 mm.
Preferably, the composition of the metal plate comprises: 80-85 parts of iron, 1.2-1.5 parts of nickel, 0.01-0.02 part of gold, 0.2-0.35 part of strontium, 0.45-0.6 part of cobalt, 0.1-0.3 part of magnesium and 0.12-0.55 part of titanium;
at least one connecting lug plate is arranged on the lower metal plate;
each connecting ear plate is provided with a straight notch with the diameter of 6mmx12mm and is fixedly arranged on the corn harvester.
Preferably, the surfaces of the upper layer and the lower layer are also provided with wave-shaped convex structures;
the wave-shaped convex structure is provided with gaps between adjacent sieve pores.
(III) advantageous effects
The invention has the beneficial effects that: the invention provides an erosion-resistant corn harvester sieve plate, which is characterized in that the sieve plate is arranged into an upper rigid-flexible composite structure and a lower rigid-flexible composite structure, and a bionic structure is arranged on the outer surface of a rigid layer. The combination of the rigid and flexible materials greatly reduces the energy when the foreign particles impact the surface of the sieve plate, and the flexible layer plays a role in slowly releasing the energy. Meanwhile, the bionic structure on the surface changes the flow state of boundary layer particles, reduces the speed and probability of the impurity particles when colliding with the sieve plate, and changes the angle of the impurity particles when colliding with the sieve plate.
Drawings
FIG. 1 is a schematic view of the overall structure of a sieve plate of an anti-erosion corn harvester provided by the invention;
FIG. 2 is a schematic view of a partially enlarged structure of a sieve plate of an anti-erosion corn harvester according to the present invention;
FIG. 3 is a schematic view of a partially enlarged structure of a sieve plate of an erosion-resistant corn harvester according to the present invention;
FIG. 4 is an exploded view of an embodiment of an erosion resistant corn harvester screen deck according to the present invention.
[ description of reference ]
1: connecting the ear plates; 2: an upper layer; 3: a middle layer; 4: a lower layer; 5: screening holes; 6: and (4) a convex hull structure.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Example one
As shown in fig. 1 and 2: the embodiment discloses a sieve plate of an anti-erosion corn harvester, which comprises an upper layer 2, a middle layer 3 and a lower layer 4; wherein the upper layer 2 and the lower layer 4 have the same structure and material.
In detail, the upper layer 2, the middle layer 3 and the lower layer 4 are glued; a plurality of screen holes 5 penetrating the upper deck 2, the middle deck 3 and the lower deck 4.
The upper-layer sieve plate structure (i.e., the upper layer 2), the middle-layer sieve plate structure and the lower-layer sieve plate structure described in this embodiment are connected by a structural adhesive, namely epoxy-phenolic adhesive, and the adhesive is coated by a brush coating method, so that the appropriate thickness is ensured.
Meanwhile, as shown in fig. 3: the surface of the upper layer 2 is provided with a binary coupling bionic convex hull structure 6.
It should be noted that: the binary coupling bionic convex hull structure 6 can furthest enhance the erosion resistance of the upper-layer sieve plate in the practical application.
In the embodiment, the upper layer 2 and the lower layer 4 are both metal plates; for example, the upper screen plate and the lower screen plate in the embodiment are both made of steel plates, and certainly, other alloy materials with better performance can be adopted on the premise that the cost allows, so that the upper screen plate and the lower screen plate can be made of the alloy materials.
It should be noted that: the middle layer 3 in this embodiment is a rubber sheet made of a rubber material.
The middle-layer sieve plate is made of the polyurethane rubber plate, so that the cost can be reduced, the product quality can be reduced, a good vibration reduction effect can be obtained, and the purpose of prolonging the service life of the product is achieved.
In the embodiment, the thicknesses of the upper layer 2 and the lower layer 4 are both 1mm-3 mm; the thickness of the middle layer 3 is 2mm-5 mm; the binary coupling bionic convex hull structure 6 is a hemisphere; the radius of the hemispheroid is 0.5mm-1.5 mm; the gap between adjacent hemispheres is 1mm-3 mm; the diameter of the sieve pore is 5mm-15 mm; the gap between adjacent sieve holes is 5mm-15 mm. The desired properties of the product provided in this embodiment can of course be achieved within the dimensions given above.
Here, the present embodiment also provides the optimal dimensions in the above product, specifically, the thicknesses of the upper layer and the lower layer are both 1.5 mm; the thickness of the middle layer is 3 mm; the radius of the hemisphere is 1 mm; the gap between adjacent hemispheres is 2 mm; the diameter of each sieve pore is 10 mm; the gap between adjacent screen holes is 10 mm.
The composition of the metal plate in this embodiment includes: 80-85 parts of iron, 1.2-1.5 parts of nickel, 0.01-0.02 part of gold, 0.2-0.35 part of strontium, 0.45-0.6 part of cobalt, 0.1-0.3 part of magnesium and 0.12-0.55 part of titanium.
Finally, it should be noted that: in the embodiment, at least one connecting lug plate 1 is arranged on the lower metal plate; each connecting ear plate 1 is provided with a straight notch with the size of 6mmx12mm and is fixed inside the corn harvester.
Certainly, in this embodiment, the surfaces of the upper layer 2 and the lower layer 4 are also provided with a wave-shaped convex structure; the wave-shaped convex structure is provided with gaps between adjacent sieve pores.
Example two
As shown in fig. 1, the present embodiment provides an erosion-resistant corn harvester sieve plate, which includes an upper sieve plate structure, a middle sieve plate structure and a lower sieve plate structure.
The upper-layer sieve plate structure, the middle-layer sieve plate structure and the lower-layer sieve plate structure are connected through a structural adhesive epoxy-phenolic adhesive, and the adhesive is coated by a brush coating method, so that the appropriate thickness is ensured.
In this embodiment, the upper and lower metal plates are made of common steel plates, and the middle rubber plate is made of polyurethane rubber. The thickness of the upper and lower metal layers is 1.5mm, and the thickness of the middle rubber layer is 3 mm.
A bionic convex hull structure is arranged on the outer surface of the metal plate, the radius R of each convex hull is 1mm, and the gap between every two adjacent convex hulls is 2 mm.
The upper layer structure, the middle layer structure and the lower layer structure are all provided with through holes at the same position, the diameter D of each through hole is 10mm, and the gap between every two adjacent through holes is 10 mm.
When the sieve plate is arranged in the corn harvester, the upper metal plate faces upwards, the sieved materials are directly contacted with the metal plate, the strength and the hardness of the metal plate are high, and meanwhile, the flowing state of the boundary layer airflow is greatly influenced by the bionic microstructure on the surface, so that the impact speed and the energy of the impurity particles are reduced. The middle rubber plate is glued on the metal plate and used as a buffer damping layer, so that the impact energy is greatly released. The lower metal plate is used for bearing force and fixing the sieve plate.
EXAMPLE III
As shown in fig. 1, the present embodiment provides an erosion-resistant corn harvester sieve plate, which includes an upper sieve plate structure, a middle sieve plate structure and a lower sieve plate structure.
The upper-layer sieve plate structure, the middle-layer sieve plate structure and the lower-layer sieve plate structure are connected through a structural adhesive epoxy-phenolic adhesive, and the adhesive is coated by a brush coating method, so that the appropriate thickness is ensured.
In this embodiment, the upper and lower metal plates are made of common steel plates, and the middle rubber plate is made of polyurethane rubber. The thickness of the upper and lower metal layers is 1mm, and the thickness of the middle rubber layer is 2 mm.
A bionic convex hull structure is arranged on the outer surface of the metal plate, the radius R of each convex hull is 0.5mm, and the gap between every two adjacent convex hulls is 1 mm.
The upper, middle and lower three-layer structures are all provided with through holes at the same position, the diameter D of each through hole is 5mm, and the gap between every two adjacent through holes is 5 mm.
When the sieve plate is arranged in the corn harvester, the upper metal plate faces upwards, the sieved materials are directly contacted with the metal plate, the strength and the hardness of the metal plate are high, and meanwhile, the flowing state of the boundary layer airflow is greatly influenced by the bionic microstructure on the surface, so that the impact speed and the energy of the impurity particles are reduced. The middle rubber plate is glued on the metal plate and used as a buffer damping layer, so that the impact energy is greatly released. The lower metal plate is used for bearing force and fixing the sieve plate.
Example four
As shown in fig. 1, the present embodiment provides an erosion-resistant corn harvester sieve plate, which includes an upper sieve plate structure, a middle sieve plate structure and a lower sieve plate structure.
The upper-layer sieve plate structure, the middle-layer sieve plate structure and the lower-layer sieve plate structure are connected through a structural adhesive epoxy-phenolic adhesive, and the adhesive is coated by a brush coating method, so that the appropriate thickness is ensured.
In this embodiment, the upper and lower metal plates are made of common steel plates, and the middle rubber plate is made of polyurethane rubber. The thickness of the upper and lower metal layers is 3mm, and the thickness of the middle rubber layer is 5 mm.
A bionic convex hull structure is arranged on the outer surface of the metal plate, the radius R of each convex hull is 1.5mm, and the gap between every two adjacent convex hulls is 3 mm.
The upper layer structure, the middle layer structure and the lower layer structure are all provided with through holes at the same position, the diameter D of each through hole is 15mm, and the gap between every two adjacent through holes is 15 mm.
When the sieve plate is arranged in the corn harvester, the upper metal plate faces upwards, the sieved materials are directly contacted with the metal plate, the strength and the hardness of the metal plate are high, and meanwhile, the flowing state of the boundary layer airflow is greatly influenced by the bionic microstructure on the surface, so that the impact speed and the energy of the impurity particles are reduced. The middle rubber plate is glued on the metal plate and used as a buffer damping layer, so that the impact energy is greatly released. The lower metal plate is used for bearing force and fixing the sieve plate.
Finally, it should be noted that: the convex hull structure reduces the damage function of the seeds.
The concrete contents are as follows: compared with the ordinary flat-plate sieve plate, the stress condition of the kernel on the sieve plate with the convex hull structure of the erosion-resistant corn harvester sieve plate provided by the embodiment is changed, as shown in fig. 4, on the convex hull structure, the stress F of the kernel can be decomposed into a tangential force F1 and a normal force F2, and the kernel damage is mainly determined by the normal force. Compared with the sieve plate with a flat plate structure, the normal force of the seeds is obviously reduced, and the damage to the seeds can be reduced.
The shock-absorbing structure reduces the function of seed grain damage.
The concrete contents are as follows: compared with a sieve plate without a damping layer, the damping layer can absorb part of energy, so that the collision force between the seeds and the sieve plate is reduced, and the damage to the seeds is reduced.
The test conditions are that the moisture content of the corn kernels is 20%, the erosion resistance of the sieve plate with the special structure is improved by 10-20%, and the stress of the corn kernels is reduced by 50-65%.
The technical principles of the present invention have been described above in connection with specific embodiments, which are intended to explain the principles of the present invention and should not be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive efforts, which shall fall within the scope of the present invention.
Claims (7)
1. The erosion-resistant sieve plate of the corn harvester is characterized by comprising an upper layer, a middle layer and a lower layer;
wherein the upper layer and the lower layer have the same structure and material;
the upper layer, the middle layer and the lower layer are glued;
a plurality of screen holes penetrating through the upper layer, the middle layer and the lower layer;
the surface of the upper layer is provided with a binary coupling bionic convex hull structure;
the upper layer and the lower layer are both metal plates;
the middle layer is a rubber plate made of rubber materials, and the rubber plate is a polyurethane rubber plate;
the binary coupling bionic convex hull structure is a hemisphere, the radius of the hemisphere is 0.5mm-1.5mm, and the gap between adjacent hemispheres is 1mm-3 mm;
the diameter of each sieve pore is 5mm-15mm, and the gap between every two adjacent sieve pores is 5mm-15 mm.
2. The screen panel of claim 1,
the thicknesses of the upper layer and the lower layer are both 1mm-3 mm;
the thickness of the middle layer is 2mm-5 mm.
3. The screen panel of claim 2,
the thicknesses of the upper layer and the lower layer are both 1.5 mm;
the thickness of the middle layer is 3 mm.
4. The screen panel of claim 3,
the radius of the hemisphere is 1 mm;
the gap between adjacent hemispheres was 2 mm.
5. The screen panel of claim 1,
the diameter of each sieve pore is 10 mm;
the gap between adjacent screen holes is 10 mm.
6. The screen panel of claim 1,
the composition of the metal plate comprises: 80-85 parts of iron, 1.2-1.5 parts of nickel, 0.01-0.02 part of gold, 0.2-0.35 part of strontium, 0.45-0.6 part of cobalt, 0.1-0.3 part of magnesium and 0.12-0.55 part of titanium;
at least one connecting lug plate is arranged on the lower metal plate;
each connecting ear plate is provided with a straight notch with the diameter of 6mmx12mm and is fixedly arranged on the corn harvester.
7. The screen panel as claimed in any one of claims 1 to 6,
the surfaces of the upper layer and the lower layer are also provided with wave-shaped convex structures;
the wavy convex structures are arranged at the positions of gaps between adjacent sieve pores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910093664.XA CN109570019B (en) | 2019-01-30 | 2019-01-30 | Anti-erosion sieve plate of corn harvester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910093664.XA CN109570019B (en) | 2019-01-30 | 2019-01-30 | Anti-erosion sieve plate of corn harvester |
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| CN109570019A CN109570019A (en) | 2019-04-05 |
| CN109570019B true CN109570019B (en) | 2020-09-01 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2589014A (en) * | 1951-02-14 | 1952-03-11 | Eastman Kodak Co | Focusing view finder system |
| US5598930A (en) * | 1995-07-20 | 1997-02-04 | Advanced Wirecloth, Inc. | Shale shaker screen |
| CN2875583Y (en) * | 2005-06-09 | 2007-03-07 | 陈硕 | Wear resistant rice screen sheet |
| CN201249179Y (en) * | 2008-08-28 | 2009-06-03 | 穆卫江 | Sieve plate of heavy vibration sieve |
| CN201423348Y (en) * | 2009-05-26 | 2010-03-17 | 包头市石宝铁矿集团有限责任公司 | Screen mesh of high-intensity composite high-frequency sieve |
| CN101618381A (en) * | 2009-07-20 | 2010-01-06 | 江苏大学 | Bionic non-smooth sorting screen surface |
| CN202570612U (en) * | 2012-05-24 | 2012-12-05 | 万俊 | Multifunctional sieve plate |
| CN103316837B (en) * | 2013-06-06 | 2016-07-13 | 北京时代桃源环境科技有限公司 | A kind of composite metal screen |
| CN204817168U (en) * | 2015-07-20 | 2015-12-02 | 焦作恒荣科技有限公司 | Rubber sieve of preventing hardening |
| CN205587295U (en) * | 2016-04-29 | 2016-09-21 | 长治学院 | A sieve for dividing classifying screen of sieve mung bean, red bean and miscellaneous beans |
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