CN114946285B - Double-blade rotary tillage device of driving type plough-rotary combined type all-in-one machine - Google Patents
Double-blade rotary tillage device of driving type plough-rotary combined type all-in-one machine Download PDFInfo
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- CN114946285B CN114946285B CN202210398604.0A CN202210398604A CN114946285B CN 114946285 B CN114946285 B CN 114946285B CN 202210398604 A CN202210398604 A CN 202210398604A CN 114946285 B CN114946285 B CN 114946285B
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- 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
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
- A01B33/10—Structural or functional features of the tools ; Theoretical aspects of the cutting action
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
Abstract
The invention discloses a double-blade rotary tillage device of a driving type plough-rotary combined type all-in-one machine, which comprises a rotary tillage cutter roller and a double-blade rotary tillage cutter assembly; each group of double-blade rotary blade assemblies comprises a rotary blade disc, a left-bent double-blade rotary blade and a right-bent double-blade rotary blade, wherein the left-bent double-blade rotary blade and the right-bent double-blade rotary blade are both arranged on the same surface of the rotary blade disc, and the installation included angle of the left-bent double-blade rotary blade and the right-bent double-blade rotary blade is 180 degrees; the left-bending double-blade rotary tillage cutter and the right-bending double-blade rotary tillage cutter both comprise cutter bodies and cutter handles, and the cutter handles are fixed on the rotary tillage cutter head; the cutter body comprises a long blade part and a short blade part, and the ratio of the turning radius of the long blade part to the turning radius of the short blade part is 1:0.85-0.95. The double-blade rotary tillage device provided by the invention is provided with a pair of tangent blades and a pair of side cutting blades, so that the soil breaking rate of the whole tillage machine can be effectively improved, the stubble of the straw can be cut twice in a sliding way by one blade rotating, and the stubble cleaning rate of the driving type combined plow-rotation type integrated machine is improved.
Description
Technical Field
The invention belongs to the technical field of agricultural machinery cultivation machinery, and particularly relates to a double-blade rotary tillage device of a driving type plough-rotary combined type integrated machine.
Background
The rice-oil wheel cultivation area in the middle and lower reaches of the Yangtze river adopts traditional cultivation machinery to cultivate the land throughout the year, so that the problems of thinning of soil cultivation layers, increase of plough low layer thickness, degradation of soil quality and the like are caused; the sowing of rape needs to ensure that the soil is finely crushed and the carriage surface is flat, but the regions in the middle and lower reaches of Yangtze river are full of rainwater throughout the year, so that the fluctuation of the water content of the soil is large, the soil is sticky and hard, and the conventional rotary tillage soil breaking device is difficult to ensure the quality of broken soil in the regions; the residual straw amount of the rape crop before sowing is large, the stubble is high, the traditional rotary tillage machine is easy to generate the phenomena of grass winding and straw winding, and simultaneously, the straw and soil can form a straw-soil mixture which is easy to adhere to working parts of the tillage machine, thereby causing the problems of blockage, poor passing performance of the whole machine and the like. The straw returning difficulty is high by adopting the traditional tillage machinery. Therefore, the double-blade rotary tillage device is designed to adapt to the working condition of heavy soil hardening and large straw amount in the middle and downstream river basin of the Yangtze river.
Disclosure of Invention
The invention aims at solving the problems that soil in the middle and downstream regions of the Yangtze river is sticky and hard to harden, the fluctuation of water content is large, the straw amount of the previous crop is large, the quality requirement of rape sowing soil is difficult to ensure by the traditional tillage machinery, and the like; provides a double-blade rotary tillage device of a driving type plow-rotating combined type all-in-one machine, which can improve the soil breaking rate and the stubble cleaning rate.
In order to achieve the purpose, the double-blade rotary tillage device of the driving type combined plow and rotary type integrated machine comprises a rotary tillage cutter roll and a plurality of groups of double-blade rotary tillage cutter assemblies which are uniformly arranged on the rotary tillage cutter roll along the axial direction of the rotary tillage cutter roll; each group of double-blade rotary blade assemblies comprises a rotary blade disc, a left-bent double-blade rotary blade and a right-bent double-blade rotary blade, wherein the left-bent double-blade rotary blade and the right-bent double-blade rotary blade are both arranged on the same surface of the rotary blade disc, and the installation included angle of the left-bent double-blade rotary blade and the right-bent double-blade rotary blade is 180 degrees;
the left-bending double-blade rotary tillage cutter and the right-bending double-blade rotary tillage cutter comprise cutter bodies and cutter handles, and the cutter handles are fixed on the rotary tillage cutter head; the cutter body comprises a long blade part and a short blade part, and the ratio of the turning radius of the long blade part to the turning radius of the short blade part is 1:0.85-0.95.
Further, the long blade part comprises a long blade part side cutting edge and a long blade part tangent edge, and the cutting edge curve of the long blade part side cutting edge and the cutting edge curve of the long blade part tangent edge are archimedes spiral lines; the archimedes spiral equation is:
ρ a ＝ρ 0 +k′θ
wherein: ρ a Is any point polar diameter on an Archimedes spiral line;
ρ 0 the pole diameter is the pole diameter of the starting point of the Archimedes spiral line;
k' is the increment of each 1 radian polar diameter of the Archimedes spiral polar angle;
θ is the polar angle of any point on the archimedes spiral;
s is the soil cutting pitch of the long blade part;
a 1 tilling depth for the long blade part;
R 1 is the radius of gyration of the long blade part;
ρ n is the polar angle at the end point of the Archimedes spiral;
θ n is the polar diameter of the end point of the Archimedes spiral line;
and the electrode diameter theta at the end point of the Archimedes spiral line n Sliding cut angle tau at end point of Archimedes spiral line n The relationship is as follows:
further, the archimedes spiral satisfies:
wherein: τ is the static slip cut angle on the archimedes spiral;
τ c is a dynamic sliding cut angle on an Archimedes spiral line;
delta tau is the static slip angle tau with the archimedes screw and the dynamic slip angle tau with the archimedes screw c A difference between;
the friction angle of the double-blade rotary tillage blade is formed by the straw and/or the stubble;
v is the forward speed of the tractor;
omega is the rotary blade rotation angular velocity;
a' is the distance from any point on the side cutting edge to the bottom of the cultivation when cutting soil;
simultaneously satisfies the tangent value of static sliding cut angle on the Archimedes spiral line and the polar diameter rho of any point on the Archimedes spiral line a Proportional, i.e
tanτ＝k′ρ a 。
Further, the short blade part comprises a short blade part side cutting edge and a short blade part tangent edge, and the cutting edge curve of the short blade part side cutting edge and the cutting edge curve of the short blade part tangent edge are both sine exponential curves; the sinusoidal exponential curve equation is:
wherein: ρ b Is any point polar diameter on a sine index curve;
ρ 1 the starting point diameter of the sinusoidal exponential curve is;
τ 0 a static sliding cut angle is used as a starting point of the sinusoidal index curve;
k is the decreasing ratio of static sliding cut angles on a sine index curve;
sigma is the polar angle of any point on the sinusoidal exponential curve;
meets the static slip cut angle tau of a sine index curve co The relationship with the polar angle sigma at any point on the sinusoidal index curve is:
τ co ＝τ 0 -Kσ。
further, the starting point of the sine index curve is static sliding cut angle tau 0 The static sliding cut angle decreasing ratio K on the sine index curve is 0.06-0.11 in the range of 35-55 degrees.
Further, the ratio of the long-edge tangential-edge working width to the short-edge tangential-edge working width is 1:0.7 to 0.8.
Further, the cross section circumference of the rotary tillage knife roll is larger than the stubble height of rice straw.
Further, the mounting interval b' =b+Δb of the rotary tillage cutterhead is the working width of the long blade part, and Δb is 15-20 mm.
Further, all the double-edged rotary blade assemblies are arranged on the rotary blade roller according to double-headed spiral lines.
Compared with the prior art, the invention has the following advantages:
the double-blade rotary tillage device has the advantages that the double-blade rotary tillage device is provided with the pair of tangent blades and the pair of side cutting blades, the soil breaking rate after the whole machine operation can be effectively improved, the stubble cleaning rate after the whole machine operation can be improved by sliding cutting the stubble of the straw twice by one blade rotating.
Secondly, the rotary tillage knife roller adopted by the invention has the roller circumference longer than the stubble remaining height of the paddy field, so that the soil straw mixture formed by winding the straw on the rotary tillage knife roller can be effectively avoided, and the passing performance of the whole machine during operation is improved.
Drawings
FIG. 1 is a schematic view of a double blade rotary tillage apparatus according to the present invention;
FIG. 2 is a schematic view of the right-hand curved double-blade rotary blade of FIG. 1;
FIG. 3 is a schematic view of the motion trail of the left-hand curved double-blade rotary blade of FIG. 1;
FIG. 4 is a schematic diagram of the working principle of FIG. 1;
FIG. 5 is a schematic view of the structure of the driving type plow and rotary combined type all-in-one machine of the present invention;
FIG. 6 is a bottom schematic view of FIG. 5;
fig. 7 is a schematic view of the right-hand double blade rotary tillage device of fig. 6.
In the figure, a double-blade rotary tillage device 1, a rotary tillage blade roller 1.1, a double-blade rotary tillage blade assembly 1.2, a rotary tillage cutter head 1.3, a long blade part 1.4, a short blade part 1.5, a right-bending double-blade rotary tillage blade 1.6, a left-bending double-blade rotary tillage blade 1.7, a spline housing 1.8, a shaft head 1.9, a main frame 2, a diagonal draw bar 2.1, a three-point suspension 2.2, a frame side plate 2.3, a frame supporting front beam 2.4, a frame supporting rear beam 2.5, a driving disc plow set 3, a middle plow 4, a furrow forming front plow 5, a furrow forming rear plow 6, a soil leveling support plate 7, a central herringbone gear box 8, a long blade part side cutting edge 9, a long blade part tangent edge 10, a short blade part side cutting edge 11 and a short blade part tangent edge 12.
Detailed Description
The present invention is described in further detail below with reference to the drawings and specific embodiments for the understanding of those skilled in the art.
The double-blade rotary tillage device 1 of the driving type combined plow and rotary type all-in-one machine shown in fig. 1 and 2 comprises a rotary tillage cutter roller 1.1 and a plurality of groups of double-blade rotary tillage cutter assemblies 1.2 which are axially and uniformly arranged on the rotary tillage cutter roller 1.1 along the rotary tillage cutter roller 1.1. Each group of double-edged rotary blade assemblies 1.2 comprises a rotary blade disc 1.3, a left-bent double-edged rotary blade 1.7 and a right-bent double-edged rotary blade 1.6, wherein the rotary blade disc 1.3 is fixedly arranged on a rotary blade roller 1.1, the left-bent double-edged rotary blade 1.7 and the right-bent double-edged rotary blade 1.6 are both arranged on the same surface of the rotary blade disc 1.3, the installation included angle between the left-bent double-edged rotary blade 1.7 and the right-bent double-edged rotary blade 1.6 is 180 degrees, and meanwhile, all the double-edged rotary blade assemblies 1.2 are arranged on the rotary blade roller 1.1 according to double-headed spiral lines.
The left-bending double-blade rotary blade 1.7 and the right-bending double-blade rotary blade 1.6 both comprise a blade body and a blade handle, and the blade handle is fixed on the rotary blade disc 1.3. The cutter body comprises a long edge part 1.4 and a short edge part 1.5, and the ratio of the turning radius of the long edge part 1.4 to the turning radius of the short edge part 1.5 is 1:0.85-0.95. The long blade portion 1.4 includes a long blade portion side cutting edge 9 and a long blade portion tangent edge 10, the short blade portion 1.5 includes a short blade portion side cutting edge 11 and a short blade portion tangent edge 12, and the cutting edge curves of the long blade portion side cutting edge 9 and the long blade portion tangent edge 10 are archimedes' spiral lines, and the cutting edge curves of the short blade portion side cutting edge 11 and the short blade portion tangent edge 12 are sinusoidal exponential curves.
The archimedes spiral equation is:
ρ a ＝ρ 0 +k′θ
wherein: ρ a Is any point polar diameter on an Archimedes spiral line;
ρ 0 the diameter of the Archimedes spiral is mm
k' is the increment of every 1 radian polar diameter of the Archimedes spiral polar angle, and mm
θ is the polar angle at any point on the Archimedes spiral, rad
S is the soil cutting pitch of the long blade part, mm
a 1 Is the depth of the long blade part, mm
R 1 Radius of revolution of long blade part, mm
ρ n Is the polar angle at the end point of the Archimedes spiral line, mm
θ n Is the polar diameter of the end point of the Archimedes spiral line, mm
Archimedes spiral end point polar diameter theta n Sliding cut angle tau at end point of Archimedes spiral line n The relationship is as follows:
soil cutting pitch of long blade part
Wherein: v is the tractor forward speed (mm/s);
n is rotary tillage rotation speed (r/min);
z is the number of double-blade rotary blades in the same soil-cutting area.
The requirements of no grass winding, small cultivation resistance and sliding cutting effect of the Archimedes spiral are met, and the requirements are ensured:
therefore, the following should be satisfied:
wherein: τ is the static slip cut angle on the archimedes spiral;
τ c is a dynamic sliding cut angle on an Archimedes spiral line;
delta tau is the static slip angle tau with the archimedes screw and the dynamic slip angle tau with the archimedes screw c A difference between;
the friction angle of the double-blade rotary tillage blade is formed by the straw and/or the stubble;
v is the tractor forward speed (mm/s);
omega is the rotary blade rotation angular velocity (rad/s);
a' is the distance from any point on the side cutting edge to the bottom of the cultivation when cutting soil, and mm;
under the condition that the forward speed of the tractor and the rotation speed of the rotary tillage cutter are fixed, the delta tau value of the cutter blade gradually decreases in the process of entering soil, and the delta tau value is the maximum value in the working process when any point on the cutter blade is positioned on the ground surface, namely a' =0.
Tangent value and polar diameter rho of static sliding cut angle on Archimedes spiral line a Proportional, i.e
tanτ＝k′ρ a
The static sliding cutting angle tau on the Archimedes spiral line gradually increases along with the increase of the turning radius of the long blade part, and the radial soil cutting length is the same when the blade rotates by a unit angle, so that the load change of the soil cutting part of the blade is more uniform.
The sinusoidal exponential curve equation is:
wherein: ρ b Is any point polar diameter on a sine index curve;
ρ 1 is a sine exponential curve starting point polar diameter, mm
τ 0 Static slip cut angle (°) for the starting point of a sinusoidal exponential curve
K is the decreasing ratio of the static sliding cut angle on the sine index curve,
sigma is the polar angle at any point on the sinusoidal exponential curve, rad
Sinusoidal exponential curve static slip cut angle τ co The relationship with the polar angle sigma is:
τ co ＝τ 0 -Kσ
the sinusoidal exponential curve static slip angle is linearly related to the polar angle, and the sinusoidal exponential curve static slip angle linearly decreases as the polar angle increases. The sinusoidal index curve is adopted as the cutting edge curve of the side cutting edge of the short edge part, so that the grass hanging of the cutter handle can be effectively prevented, and the rotary tillage cutter is ensured to have high stubble and not to twine grass in a field with more grass.
Selecting different curve starting point sine index static slip cut angles tau 0 And the static sliding cut angle decreasing ratio K on the sine index curve can obtain different performance curves. Referring to an agricultural machinery design manual, in order to ensure that grass is not wound in the working process of the side cutting edge of the short blade part, the sliding cutting angle of the base cutting edge of the cutter handle is larger than that of the curve end point of the side cutting edge of the short blade part, but the sliding cutting angle is overlarge, the working friction resistance of the rotary blade is increased, and the static sliding cutting angle tau of the curve starting point is increased 0 The static sliding cutting angle decreasing ratio K on the curve is 0.06-0.11 in the range of 35-55 degrees. To ensure that soil is not clamped between the long edge tangent edge and the short edge tangent edgeAnd grass winding, wherein the overlapping area of the two tangent planes is reduced as much as possible, so that the ratio of the working width of the tangent edge of the long edge part to the working width of the tangent edge of the short edge part is designed to be 1:0.7 to 0.8.
In order to avoid the large amount of grass winding of the rotary tillage knife roller, the circumference of the cross section of the rotary tillage knife roller is larger than the height of the rice straw stubble. The installation interval b' =b+Δb of the rotary tillage cutterhead, b is the working width of the long blade part, and Δb is 15-20 mm.
When the double-blade rotary tillage cutter works in a field, the motion trail of the short blade part and the long blade part of the double-blade rotary tillage cutter is trochoid, the short blade part side cutting edge can firstly contact straw and soil to generate a cutting effect on the soil straw, when the double-blade rotary tillage cutter works in a wet field and softer soil, the straw cannot be cut off, and the straw slides along the short blade part side cutting edge and is separated from the contact of the short blade part side cutting edge and the long blade part side cutting edge, and the long blade part side cutting edge continuously cuts the straw; in the soil cutting process, the short-blade tangential blade of the double-blade rotary blade cuts soil having a thickness H first, and then the long-blade tangential blade cuts soil having a thickness B, as is apparent from the working principle diagram 4, h+b=s. And the minimum soil thickness of traditional rotary blade cutting is cutting soil pitch S, consequently, compare traditional rotary blade, double-bladed rotary tillage device cutting soil thickness is less than cutting soil pitch, has better soil fine crushing ability. The field test proves that the soil breaking rate of the driving type plough-rotary integrated machine with the double-blade rotary tillage device is 94.74 percent after the driving type plough-rotary integrated machine works, the straw burying rate is 95.95 percent, and compared with the driving type plough-rotary integrated machine with the traditional rotary tillage device, the soil breaking rate is improved by 12.43 percent, and the straw burying rate is improved by 3.65 percent.
The combined all-in-one machine with the driving plow and the rotating machine comprises a main frame 2, a central herringbone double-shaft gear box 8, a driving disc plow set 3 arranged on the front shaft of the central herringbone double-shaft gear box 8, a rotary tillage device arranged on the rear shaft of the central herringbone double-shaft gear box 8, a middle plow 4 arranged in front of the central herringbone double-shaft gear box 8, a soil leveling supporting plate 7 arranged behind the main frame 2, a furrow-opening front plow 5 arranged in front of the main frame 2 and a furrow-opening rear plow 6 arranged behind the main frame, wherein the driving disc plow set is characterized in that the driving disc plow set is arranged on the front shaft of the central herringbone double-shaft gear box 8; the main frame 2 comprises diagonal draw bars 2.1, three-point suspensions 2.2, frame side plates 2.3 on two sides, a frame support front beam 2.4 at the front end and a frame support rear beam 2.5 at the rear end, flange plates are arranged at two ends of the frame support front beam 2.4 and the frame support rear beam 2.5 and are connected with the frame side plates 2.3 on two sides through bolts; the central herringbone double-shaft gear box 8 is arranged between the frame support front beam 2.4 and the frame support rear beam 2.5; the flat soil supporting plate 7 is downwards arranged behind the frame support rear beam 2.5 through pins.
The rotary tillage device comprises two groups of double-blade rotary tillage devices 1, wherein the right end of a rotary tillage cutter shaft in the left-end double-blade rotary tillage device is connected with the left end of a rear shaft of a central herringbone double-shaft gear box 8 through a spline housing 1.8, and the left end is connected with a frame side plate 2.3 of a main frame 2 through a shaft head 1.9; the left end of a rotary tillage cutter shaft in the right-end double-blade rotary tillage device is connected with the right end of a rear shaft of the central herringbone double-shaft gear box 8 through a spline housing 1.8, and the right end is connected with a frame side plate 2.3 of the main frame 2 through a shaft head 1.9. The double-blade rotary blade assembly of the left-end double-blade rotary blade device and the double-blade rotary blade assembly of the right-end double-blade rotary blade device are in spiral line opposite rotation directions and are arranged at the same lift angle.
Working principle: the double-blade rotary tillage device 1 is arranged in the main frame 2, and the central herringbone double-shaft gear box 8 transmits the power generated by the tractor to the front and rear output shafts to drive the disc plow set 3 and the double-blade rotary tillage device 1 to rotate. During cultivation, the disc plow set 3 is driven by the rotation of the disc plow shaft to primarily finish the straw cutting and soil turning and crushing operations, and then the double-blade rotary tillage device 1 further finishes the operations of crushing soil, leveling the earth surface and stubble cleaning; when the double-blade rotary tillage device 1 works, the long blade part and the short blade part alternately enter soil, firstly the short blade part contacts with uncut soil, the soil and straw are cut and stubble is broken preliminarily, and then the long blade part with larger turning radius is used for further cutting and stubble breaking the soil; the long edge part and the short edge part of the soil are alternately used for discharging and throwing the soil, and the soil is thrown to strike the main frame to further crush the soil; along with the advancing of the machine tool, the soil leveling supporting plate 7 is driven to work so as to level the ground surface; simultaneously, the drainage furrow is formed by ploughing before and after the furrow is formed, so that the rape seed bed can be prepared by one-time operation of the tractor, and the whole machine has good passing performance.
Claims (5)
1. The utility model provides a double-edged rotary tillage device of combination formula all-in-one is revolved to drive formula plough which characterized in that: comprises a rotary blade roller (1.1) and a plurality of groups of double-blade rotary blade assemblies (1.2) which are axially and uniformly arranged on the rotary blade roller (1.1) along the rotary blade roller (1.1); each group of double-blade rotary blade assemblies (1.2) comprises a rotary blade disc (1.3), a left-bent double-blade rotary blade (1.7) and a right-bent double-blade rotary blade (1.6), wherein the left-bent double-blade rotary blade (1.7) and the right-bent double-blade rotary blade (1.6) are both arranged on the same surface of the rotary blade disc (1.3), and the installation included angle of the left-bent double-blade rotary blade (1.7) and the right-bent double-blade rotary blade (1.6) is 180 degrees;
the left-bending double-blade rotary tillage cutter (1.7) and the right-bending double-blade rotary tillage cutter (1.6) comprise cutter bodies and cutter handles, and the cutter handles are fixed on the rotary tillage cutter head (1.3); the cutter body comprises a long blade part (1.4) and a short blade part (1.5), and the ratio of the turning radius of the long blade part (1.4) to the turning radius of the short blade part (1.5) is 1:0.85-0.95;
the long blade part (1.4) comprises a long blade part side cutting edge (9) and a long blade part tangent edge (10), and the cutting edge curve of the long blade part side cutting edge (9) and the cutting edge curve of the long blade part tangent edge (10) are archimedes spiral lines; the archimedes spiral equation is:
ρ a ＝ρ 0 +k ′ θ
wherein: ρ a Is any point polar diameter on an Archimedes spiral line;
ρ 0 the pole diameter is the pole diameter of the starting point of the Archimedes spiral line;
k' is the increment of each 1 radian polar diameter of the Archimedes spiral polar angle;
θ is the polar angle of any point on the archimedes spiral;
s is the soil cutting pitch of the long blade part;
a 1 tilling depth for the long blade part;
R 1 is the radius of gyration of the long blade part;
ρ n is the polar angle at the end point of the Archimedes spiral;
θ n is the polar diameter of the end point of the Archimedes spiral line;
and the electrode diameter theta at the end point of the Archimedes spiral line n Sliding cut angle tau at end point of Archimedes spiral line n The relationship is as follows:
the archimedes spiral meets the following conditions:
wherein: τ is the static slip cut angle on the archimedes spiral;
τ c is a dynamic sliding cut angle on an Archimedes spiral line;
delta tau is the static slip angle tau with the archimedes screw and the dynamic slip angle tau with the archimedes screw c A difference between;
the friction angle of the double-blade rotary tillage blade is formed by the straw and/or the stubble;
v is the forward speed of the tractor;
omega is the rotary blade rotation angular velocity;
a ′ the distance between any point on the side cutting edge and the bottom of the cultivation is the distance between any point on the side cutting edge and the bottom of the cultivation when soil is cut;
at the same time satisfy the requirements of the AzithromTangent value of static sliding cut angle on De-spiral line and polar diameter rho of any point on Archimedes spiral line a Proportional, i.e
tanτ＝k′ρ a ；
The short blade part (1.5) comprises a short blade part side cutting edge (11) and a short blade part tangent edge (12), and the cutting edge curve of the short blade part side cutting edge (11) and the cutting edge curve of the short blade part tangent edge (12) are both sine exponential curves; the sinusoidal exponential curve equation is:
wherein: ρ b Is any point polar diameter on a sine index curve;
ρ 1 the starting point diameter of the sinusoidal exponential curve is;
τ 0 a static sliding cut angle is used as a starting point of the sinusoidal index curve;
k is the decreasing ratio of static sliding cut angles on a sine index curve;
sigma is the polar angle of any point on the sinusoidal exponential curve;
meets the static slip cut angle tau of a sine index curve co The relationship with the polar angle sigma at any point on the sinusoidal index curve is:
τ co ＝τ 0 -Kσ；
the starting point of the sine index curve is static sliding cut angle tau 0 The static sliding cut angle decreasing ratio K on the sine index curve is 0.06-0.11 in the range of 35-55 degrees.
2. The double-blade rotary tillage device of the driving type combined plow and rotary machine according to claim 1, characterized in that: the ratio of the working width of the long-edge tangential edge to the working width of the short-edge tangential edge is 1:0.7 to 0.8.
3. The double-blade rotary tillage device of the driving type combined plow and rotary machine according to claim 1, characterized in that: the cross section circumference of the rotary tillage knife roll (1.1) is larger than the stubble height of rice straw.
4. The double-blade rotary tillage device of the driving type combined plow and rotary machine according to claim 1, characterized in that: the installation interval b of the rotary tillage cutterhead (1.3) ′ B+Δb, b is the long blade working width, and Δb is 15 to 20mm.
5. The double-blade rotary tillage device of the driving type combined plow and rotary machine according to claim 1, characterized in that: all the double-edged rotary blade assemblies (1.2) are arranged on the rotary blade roller (1.1) according to double-headed spiral lines.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2551857A1 (en) * | 1974-04-18 | 1977-06-02 | Willibald Josef Maschf | Soil cultivator with rotary implement shaft - has hinged implements on shaft with cutting edges and double edged cutting beater bars |
| JPS6312203A (en) * | 1986-06-30 | 1988-01-19 | 小橋工業株式会社 | Up-cutting rotary plowing apparatus for deep plowing |
| CN2330149Y (en) * | 1998-06-22 | 1999-07-28 | 武进协昌橡塑机械厂 | Rototilling stubble cleaner |
| CN201069889Y (en) * | 2007-08-01 | 2008-06-11 | 华中农业大学 | Suspension type rotary tillage stubble plowing and grass burying harrow |
| CN201087990Y (en) * | 2007-10-10 | 2008-07-23 | 王森豹 | Double-edged rotary blade |
| CN203761764U (en) * | 2014-03-05 | 2014-08-13 | 李小明 | Transverse rotary stubble cleaning mechanism |
| CN113853857A (en) * | 2021-10-15 | 2021-12-31 | 华中农业大学 | Combined rape tilling and leveling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106171062B (en) * | 2016-07-28 | 2018-12-14 | 江苏大学 | A kind of tilting latent deep rotary cultivator attachment of soil reverse |
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2022
- 2022-04-15 CN CN202210398604.0A patent/CN114946285B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2551857A1 (en) * | 1974-04-18 | 1977-06-02 | Willibald Josef Maschf | Soil cultivator with rotary implement shaft - has hinged implements on shaft with cutting edges and double edged cutting beater bars |
| JPS6312203A (en) * | 1986-06-30 | 1988-01-19 | 小橋工業株式会社 | Up-cutting rotary plowing apparatus for deep plowing |
| CN2330149Y (en) * | 1998-06-22 | 1999-07-28 | 武进协昌橡塑机械厂 | Rototilling stubble cleaner |
| CN201069889Y (en) * | 2007-08-01 | 2008-06-11 | 华中农业大学 | Suspension type rotary tillage stubble plowing and grass burying harrow |
| CN201087990Y (en) * | 2007-10-10 | 2008-07-23 | 王森豹 | Double-edged rotary blade |
| CN203761764U (en) * | 2014-03-05 | 2014-08-13 | 李小明 | Transverse rotary stubble cleaning mechanism |
| CN113853857A (en) * | 2021-10-15 | 2021-12-31 | 华中农业大学 | Combined rape tilling and leveling device |
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| CN114946285A (en) | 2022-08-30 |
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