CN114793566A - Self-disturbing seed tray with involute seed guide groove - Google Patents
Self-disturbing seed tray with involute seed guide groove Download PDFInfo
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- CN114793566A CN114793566A CN202210572301.6A CN202210572301A CN114793566A CN 114793566 A CN114793566 A CN 114793566A CN 202210572301 A CN202210572301 A CN 202210572301A CN 114793566 A CN114793566 A CN 114793566A
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- 239000000463 material Substances 0.000 claims abstract description 24
- 210000003205 muscle Anatomy 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 18
- 238000010899 nucleation Methods 0.000 abstract description 12
- 238000012797 qualification Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 244000068988 Glycine max Species 0.000 description 21
- 235000010469 Glycine max Nutrition 0.000 description 21
- 238000000034 method Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 238000009331 sowing Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 240000008042 Zea mays Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 240000002791 Brassica napus Species 0.000 description 1
- 235000004977 Brassica sinapistrum Nutrition 0.000 description 1
- 208000003643 Callosities Diseases 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/04—Single-grain seeders with or without suction devices
- A01C7/042—Single-grain seeders with or without suction devices using pneumatic means
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
- A01C7/081—Seeders depositing seeds in rows using pneumatic means
- A01C7/082—Ducts, distribution pipes or details thereof for pneumatic seeders
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- Life Sciences & Earth Sciences (AREA)
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- Environmental Sciences (AREA)
- Sowing (AREA)
Abstract
The invention relates to the technical field of seed metering devices, and particularly discloses a self-disturbing seed tray with an involute seed guide groove; the seed-mixing device comprises a circular disc body, wherein a positioning hole is formed in the center of the circular disc body, a plurality of seed guide grooves with involute shapes are formed in the outer edge of the upper surface of the circular disc body in an annular array shape, the upper boundary of each seed guide groove is in an incomplete circular shape, the lower boundary of each seed guide groove is in an involute shape, the lower boundaries of the seed guide grooves are tangent to the end parts of the upper boundaries, seed disturbing ribs are formed on the lower boundaries of two adjacent seed guide grooves, and a material sucking hole is formed in the upper boundary of each seed guide groove; this from disturbing kind of dish not only has better disturbing kind of effect to the population, it still has the guide effect to it to lead kind of groove when disturbing the seed moreover for the seed enters into incomplete circular form along opening linear form lower boundary and goes up the border, then is inhaled the material hole smoothly and adsorbs, thereby makes to catch the accurate absorption of seed, even also can effectively guarantee under complicated operating mode to disturb kind of effect and ensure accurate seed of catching, has greatly improved the seeding qualification rate.
Description
Technical Field
The invention relates to the technical field of pneumatic seed metering devices, and particularly discloses a self-disturbing seed tray with an involute-shaped seed guide groove.
Background
The most core seed metering devices in pneumatic seed metering machines, pneumatic seed metering devices, have been widely used for the sowing of seeds such as rapeseed, soybean, corn, etc. The structural design of a seed metering disc in the existing seed metering device is that a plurality of material sucking holes are formed in an annular array at the outer edge of a disc, seeds are adsorbed on the material sucking holes through negative pressure, and the adsorbed seeds are discharged through positive pressure after rotating to a certain position along with the seed metering disc, so that the seeds are fed and discharged.
The seed-metering disc in the prior pneumatic seed-metering device has two main structures of a plane disc and a convex hole disc. The flat disc has poor seed disturbing effect when being used in a pneumatic seed sowing device, and cannot break the stable stacking state of the seed group in the rotating process, so that the effects of capturing the seeds and accurately adsorbing the seeds are not ideal, and the miss-seeding rate of the flat disc is high when the flat disc is used for large-particle seeds such as soybeans and corns. Protruding type hole dish compares in plane dish though can improve its seed disturbing effect to a certain extent, but its seed disturbing effect is general when facing complicated operating mode, can't reach the effect of accurate seeding, carries the seed under high-speed operating mode moreover and when rotating for the seed takes place the extrusion with the cell wall easily, leads to the seed to receive the injury in extrusion process. Therefore, aiming at the defects of poor seed disturbing effect, high miss-seeding rate and easy damage of seeds under a high-speed working condition of a plane disc and a convex hole disc in the conventional pneumatic seed sowing device, the application provides the self-disturbing seed disc with the involute-shaped seed guide groove to solve the defects of the conventional seed sowing disc.
Disclosure of Invention
The invention aims to design a self-disturbing seed plate with an involute-shaped seed guide groove to solve the defects of the existing seed plate, aiming at the defects of poor seed disturbing effect, high miss-seeding rate and easy damage of seeds under a high-speed working condition of a plane plate and a convex hole plate in the existing pneumatic seed sowing device.
The invention is realized by the following technical scheme:
the utility model provides a from disturbing kind of dish with involute form seed guide groove, includes the circular disk body that centre of a circle department offered the locating hole, the upper surface outer fringe of circular disk body is the annular array form and has offered a plurality of and have involute form seed guide groove, seed guide groove's last border is incomplete circular form, and the lower border is involute form, and seed guide groove's lower border is tangent with the tip on last border, adjacent two seed guide groove's lower border has formed the seed disturbing rib, it inhales the material hole to have seted up in seed guide groove's the upper border.
According to the self-disturbing seed tray designed by the invention, the self-disturbing seed tray can effectively disturb the seed group in the process of rotating along with the seeding shaft through the arranged seed guide groove with the involute shape, the seeds can flow to the position of the incomplete circular lower boundary along with the involute shape lower boundary of the seed guide groove in the disturbing process, and then the seeds are accurately adsorbed by the material sucking hole when moving to the incomplete circular lower boundary, so that the seeds can be accurately captured even under the complex and high-speed working conditions, and the seed guide groove is inwards sunken, so that compared with a convex hole tray, the self-disturbing seed tray can prevent the seeds from being extruded and damaged in the process of rotating along with the self-disturbing seed tray.
As a further configuration of the above solution, the lower boundary of the involute shape in the seed guiding groove satisfies a functional relationship:
wherein,
、
is a plane coordinate system established by taking the center of a circle of the circular disc body as an origin,
is the diameter of the base circle,
is a parameter of an equation, and
。
as a further arrangement of the above solution, the functional relation satisfied by the upper boundary of the incomplete circle in the seed guiding groove is as follows:
As a specific arrangement of the scheme, 10-30 seed guide grooves are formed in the circular tray body.
As a specific arrangement of the scheme, the included angle between the side wall of the seed guide groove and the horizontal line meets the requirement
。
As a further arrangement of the above scheme, the cross section of the material suction hole is a trapezoid with a wide upper part and a narrow lower part, and the diameter of the upper surface of the material suction hole
And a lower surface diameter of
Respectively satisfy:
，
(ii) a Wherein,
is the geometric mean diameter of the seed.
As a further arrangement of the above solution, the distance L between the starting points of the two involute-shaped lower boundaries in the seed guiding groove satisfies
The distance between the top starting points of the two seed disturbing ribs on the circular tray body
Satisfy the following requirements
(ii) a Wherein,
is the maximum value of the seed diameter.
As a further arrangement of the proposal, the distance from the middle point of the excircle line of the circular disc body between the lower boundaries of the two involute shapes in the seed guide groove to the lower end of the material suction hole
Satisfy the relation
(ii) a Wherein,
is the maximum value of the diameter of the seed,
the radius of the upper boundary of the incomplete circle in the seed guide groove, D 1 Is the diameter of the upper surface of the material suction hole.
As a further arrangement of the above solution, the thickness of the seed disturbing ribs
Satisfy the following requirements
And is and
(ii) a Wherein,
the thickness between the bottom wall of the seed guiding groove and the lower surface of the circular tray body,
the total thickness of the circular disk body.
The invention has the beneficial effects that:
compared with the existing plane disc and the existing convex hole disc, the self-disturbance disc has a better disturbance effect on the population, and the seed guide groove arranged on the self-disturbance disc also has a guiding effect on the seed when the seed is disturbed, so that the seed enters the incomplete circular upper boundary along the open linear lower boundary and is smoothly adsorbed by the material sucking hole, the seed is accurately adsorbed and captured, and the disturbance effect and the accurate capture of the seed can be effectively ensured even under the complex working condition; meanwhile, the disturbed seed moves in an involute shape, so that the seeds flow in a guiding mode along the track of the disturbance ribs, the extrusion force on the seeds during high-speed rotation of the seed tray can be reduced, and the seeds are prevented from being damaged. In conclusion, this kind of seed tray of disturbing certainly has greatly improved the seeding qualification rate and has avoided the seed motion in-process impaired, uses it on large granule seed, and the effect is especially outstanding.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic top plan view of a self-disturbing seed tray according to the present invention;
FIG. 2 is a schematic perspective view of the self-disturbing tray of the present invention;
FIG. 3 is a partial enlarged view of the self-disturbing seed disk of the present invention;
FIG. 4 is a schematic diagram showing the structure of an involute-shaped seed guide groove in the present invention;
FIG. 5 is a schematic cross-sectional view of an involute-shaped seed guide groove of the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1-5, in conjunction with the embodiments.
Example 1
The embodiment 1 discloses a self-disturbing seed tray with an involute-shaped seed guide groove, and referring to fig. 1 and fig. 2, the self-disturbing seed tray comprises a circular tray body 1, a positioning hole 2 is arranged at the center of the circular tray body 1, the shape of the positioning hole 2 can be designed into a spline hole, a waist-shaped hole or other non-circular shapes, and the circular tray body 1 can synchronously rotate along with a seed shaft under the action of the seed shaft.
The key design of the self-disturbing seed tray is that a plurality of seed guiding grooves 101 with involute shapes are arranged along the outer edge of the upper surface of the circular tray body 1 in an annular array shape, the number of the seed guiding grooves 101 is determined according to the size of the self-disturbing seed tray and an application object, and the number of the seed guiding grooves is generally set between 10 and 30. The upper boundary of the seed guide groove 101 is in an incomplete circular shape, the lower boundary is in an involute shape, and the lower boundary of the seed guide groove 101 is tangent to the end part of the upper boundary, so that the involute-shaped lower boundaries of two adjacent seed guide grooves 101 form seed disturbing ribs 102 with a guiding function.
And finally, the upper boundary of the incomplete round shape of each seed guide groove 102 is provided with a material sucking hole 103, so that the seeds move to the material sucking holes 103 under the action of the seed guide grooves 101 and are accurately adsorbed and captured by negative pressure. In order to realize effective adsorption of seeds, the section of the material suction hole 103 is in a trapezoid shape with a wide upper part and a narrow lower part, and the diameter of the upper surface of the material suction hole is
The diameter of the lower surface is
。
In the specific design, a plane coordinate system is established by taking the circle center of the circular disc body as an origin, and the track function relation of the lower boundary of the involute shape in the seed guiding groove is as follows:
the track function relation of the upper boundary of the incomplete circle in the seed guide groove is as follows:
The following parameters of the self-disturbing seed tray in this example 1 were designed by taking soybean planting as an application object:
referring to fig. 4 and 5, the diameter of the upper surface of the material suction hole 103 on the circular disc body 1
Diameter of lower surface
The size of the seed metering device is calculated according to a pneumatic seed metering device type hole calculation formula of an agricultural machine design manual during design: respectively satisfy:
，
in the formula
Is the geometric mean diameter of the soybean seeds.
In addition, in order to ensure that soybean seeds can be completely filled into the involute-shaped seed guide groove 101 in the seeding process and have good seed disturbing effect and seed filling performance, the distance between the starting points of involutes on two sides of the seed guide groove
Satisfy the requirement of
Distance between the starting points of the top ends of the two seed disturbing ribs 102
Satisfy the requirement of
In the formula
The maximum diameter of soybean seeds is taken as an example of soybean seed practice, and the diameter of soybean seeds is taken as a maximum value in the example
Taking the material with the thickness of 15mm,
take 18 mm.
The upper boundary of the seed guide groove is an incomplete circular contour, and the functional relationship established by the circular contour satisfies that:
，
because the two ends of the semicircular outline are tangent to the involute-shaped lower boundary of the seed guide groove, the seed guide groove will be formed
Taking 7.5mm, mixing
Take 62.5 mm.
Referring to fig. 4, the distance from the midpoint of the outer circular line of the circular tray between the two lower boundaries of the seed guiding groove 101 to the bottom end of the corresponding material sucking hole 103 should be not less than 1.5 times of the maximum length of the soybean seeds, and the following relation is required:
then will be
Take 26.5 mm.
In addition, the soybean seeds are subjected to the transverse thrust from the seed guide groove on the seed disturbing plate when the seed filling area is full, so that the disturbance effect on the population can be realized, and the sufficient contact area between the seed guide groove and the seeds is ensured, namely the part of the soybean seeds, which is sunk into the seed guide groove, is larger than the thickness of the soybean seeds
. In order to avoid the phenomenon of seed clamping in the seed cleaning process, the seed guide groove can not be provided with a seed guide grooveThick, i.e. the part of the seed trapped in the seed-guiding groove should not exceed the thickness of the seed
。
Referring to FIG. 5, the following relationship can be found from the adsorption state of soybean seeds:
and in the formula, h is the length of the soybean seeds exceeding the depth of the seed guide groove in the length direction when the soybean seeds are filled into the seed guide groove, the shape of the soybean seeds is simplified into a circle because the shape of the soybean seeds is approximately spherical, and the angle alpha is the included angle between the boundary of the seed guide groove and a horizontal line.
The particle size range of the soybean seeds is mainly concentrated between 6 mm and 7mm through measurement. Herein when
Taking 7mm, and obtaining the following formula:
is calculated to obtain
。
In the above formula: the larger the value of alpha is, the more favorable the seed cleaning is, the phenomenon that soybean seeds are clamped in the notches in the seeding process is reduced, the smaller the value of alpha is, the larger the transverse pushing force of the notches to the seeds is, the better disturbance effect of the seed group is facilitated, and therefore, under the condition that the seeds are prevented from being clamped, the smaller angle alpha is selected to obtain the better disturbance effect, and therefore, the value of alpha is 115 degrees during the specific design.
Finally, referring to FIG. 5, the thickness of the seed perturbation ribs 102 in the present embodiment
Satisfy the requirement of
And is and
(ii) a Wherein,
the thickness between the bottom wall of the seed guide groove 101 and the lower surface of the circular tray body 1,
the total thickness of the circular disc body 1. In addition, when the disc is applied to soybean sowing, the length range of soybeans is mainly concentrated between 6 mm and 7mm, so that the total thickness of the circular disc body 1 in the embodiment is set to be 4mm, and the disc is sowed by the formula:
and calculating to obtain:
i.e. the thickness of the seed scrambling ribs 102 is set to 3.2 mm.
The self-disturbing seed tray with the involute-shaped seed guiding groove designed in the embodiment 1 is compared with a plane tray and a convex hole tray in an experiment, the seeding qualification rate (H) and the miss-seeding rate (L) of the self-disturbing seed tray with the involute-shaped seed guiding groove are counted under the working negative pressure of 2.0/kPa, 3.0/kPa and 4.0/kPa and the working condition that the rotation speed of the seed tray is 7r/min, 14r/min, 21r/min and 28r/min respectively, and the experimental data of the three can refer to the following table 1:
TABLE 1
As can be seen from Table 1, compared with the planar disk and the convex hole disk, the self-disturbing disk with the involute-shaped seed guide groove of the invention has higher seeding qualification rate under the working conditions of working negative pressure of 2.0/kPa, 3.0/kPa and 4.0/kPa and the rotating speed of the disk of 7r/min, 14r/min, 21r/min and 28r/min, respectively, and has lower miss rate than the other two disks under the working conditions.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a from disturbing dish with involute form seed guide groove, includes that centre of a circle department sets up circular disk body (1) of locating hole (2), its characterized in that, the upper surface outer fringe of circular disk body (1) is the annular array form and has seted up a plurality of and have involute form seed guide groove (101), the upper boundary of seed guide groove (101) is incomplete circular form, and the lower boundary is involute form, and the lower boundary of seed guide groove (101) is tangent with the tip on upper boundary, adjacent two the lower boundary of seed guide groove (101) has formed disturbing muscle strip (102), it has material sucking hole (103) to open in the upper boundary of seed guide groove (101).
2. The self-disturbing disc with involute-shaped seed guiding grooves according to claim 1, wherein the lower boundary of the involute shape in the seed guiding groove (101) satisfies the functional relationship:
wherein,
、
is a plane coordinate system established by taking the center of a circle of the circular disc body (1) as an origin,
is the diameter of the base circle,
is a parameter of an equation, and
。
3. the self-disturbing disc with the involute-shaped seed guide groove according to claim 2, wherein the upper boundary of the incomplete circle in the seed guide groove (101) satisfies the functional relation:
4. The self-disturbing plate with the involute wire-shaped seed guiding groove according to claim 1, wherein 10 to 30 seed guiding grooves (101) are formed in the circular plate body (1).
5. The self-disturbing plate with the involute seed guide groove according to claim 1, wherein the sidewall of the seed guide groove (101) forms an angle with the horizontal line
Satisfy the requirement of
。
6. The self-disturbing disc with the involute wire-shaped seed guide groove according to claim 1, wherein the cross section of the material suction hole (103) is a trapezoid with a wide top and a narrow bottom, and the diameter of the upper surface of the material suction hole (103) is
And a lower surface diameter of
Respectively satisfy:
(ii) a Wherein,
is the geometric mean diameter of the seed.
7. The self-disturbing disc with involute-shaped seed guiding grooves according to claim 1, wherein a distance L between starting points of two involute-shaped lower boundaries in the seed guiding groove (101) satisfies
The distance between the top starting points of the two seed disturbing ribs (102) on the circular tray body (1)
To satisfy
(ii) a Wherein,
is the maximum value of the seed diameter.
8. The self-disturbing tray with the involute-shaped seed guide groove according to claim 1, wherein the seed guide groove (101) is provided with a distance from the midpoint of the outer circle line of the circular tray body between the lower boundaries of the two involute shapes to the lower end of the material suction hole (103)
Satisfy the relation
(ii) a Wherein,
is the maximum value of the diameter of the seed,
the radius of the upper boundary of the incomplete circle in the seed guide groove (101), D 1 Is the diameter of the upper surface of the material suction hole (103).
9. The self-disturbing disc with the involute seed guide groove according to claim 1, wherein the thickness of the seed disturbing rib (102)
Satisfy the following requirements
And is and
(ii) a Wherein,
is the thickness between the bottom wall of the seed guide groove (104) and the lower surface of the circular tray body (1),
is the total thickness of the circular disc body (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210572301.6A CN114793566B (en) | 2022-05-25 | 2022-05-25 | Self-disturbing seed tray with involute seed guiding groove |
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| CN202210572301.6A CN114793566B (en) | 2022-05-25 | 2022-05-25 | Self-disturbing seed tray with involute seed guiding groove |
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