CN107439061B - Fitting curve type subsoiler handle - Google Patents
Fitting curve type subsoiler handle Download PDFInfo
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- CN107439061B CN107439061B CN201710740728.1A CN201710740728A CN107439061B CN 107439061 B CN107439061 B CN 107439061B CN 201710740728 A CN201710740728 A CN 201710740728A CN 107439061 B CN107439061 B CN 107439061B
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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
- A01B13/00—Ploughs or like machines for special purposes
- A01B13/08—Ploughs or like machines for special purposes for working subsoil
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Abstract
一种拟合曲线型深松铲柄，属于农业机械耕作领域。本发明的目的是通过仿真分析及优化设计，设计一种能明显降低耕作阻力和表层土壤扰动量的拟合曲线型深松铲柄。本发明由铲柄与机架连接段(L)、铲柄工作段(Ⅱ)、铲柄与铲尖连接段(S)组成。其特征在于铲柄刃口曲线OP、PQ、QR段分别由下列三段拟合曲线方程制得：y＝‑0.3845x4‑700.4x3‑4.785×1010x2‑1.453×108x‑1.654×1010；y＝8.951×10‑5x5‑0.02656x4+3.148x3‑186.2x2+5496x‑6.52×104；y＝1.702×10‑7x7+1.718×10‑5x6+7.024×10‑5x5+0.01474x4+0.1653x3+0.944x2+2.342x‑442.6铲柄工作段的内准线(FG)和铲柄工作段的外准线(MN)与刃口曲线一致，OR、MN高度为H0。加之切削刃角(α)、入土角(W)、刃形线(BC、CD)的选定，能有效降低耕作阻力和表层土壤扰动量，满足保护性耕作的要求。
A curve-fitting deep loosening shovel handle belongs to the field of agricultural machinery farming. The purpose of the present invention is to design a curve-fitting subsoiling shovel handle which can obviously reduce the tillage resistance and the disturbance amount of the surface soil through simulation analysis and optimal design. The invention consists of a connecting section (L) between the shovel handle and the frame, a working section (II) of the shovel handle, and a connecting section (S) between the shovel handle and the shovel tip. It is characterized in that the shovel handle edge curves OP, PQ and QR are respectively obtained by the following three fitting curve equations: y=‑0.3845x 4‑700.4x 3‑4.785 ×10 10 x 2‑1.453 ×10 8 x‑ 1.654×10 10 ; y=8.951× 10‑5 x 5‑0.02656x 4 +3.148x 3‑186.2x 2 + 5496x‑6.52×10 4 ; y=1.702× 10‑7 x 7 +1.718× 10‑5 x 6 +7.024×10 ‑5 x 5 +0.01474x 4 +0.1653x 3 +0.944x 2 +2.342x‑442.6 The inner guideline (FG) of the working section of the shovel handle (FG) and the outer guideline (MN) of the working section of the shovel handle are the same as the The cutting edge curves are the same, and the heights of OR and MN are H 0 . In addition, the selection of cutting edge angle (α), soil entry angle (W), and edge line (BC, CD) can effectively reduce the tillage resistance and surface soil disturbance, and meet the requirements of conservation tillage.
Description
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to a fitting curve type subsoiler handle.
Background
The deep scarification is one of core technologies of protective farming, and soil can break a hard plough bottom layer through the deep scarification, improve the water utilization rate, reduce water and soil loss, enhance the water and soil retention capacity, improve the growth environment of crop roots and be beneficial to the growth and development of the crop roots, so that the yield of the root crops can be greatly increased. Subsoiler is the key part of subsoiling machinery, and current subsoiler often has the farming resistance too big when carrying out the subsoiling operation, ploughs the too big scheduling problem of surface soil disturbance volume behind the subsoiling. Therefore, the tillage resistance and the disturbance amount of surface soil are reduced through reasonable design and optimization of the structure of the subsoiler, and the subsoiler has important significance for energy conservation and consumption reduction of machinery and water storage and soil moisture conservation of soil.
Disclosure of Invention
The invention aims to design a fitting curve type subsoiler handle through simulation analysis and optimization design, and solve the problems of overlarge tillage resistance and surface soil disturbance of a subsoiler in the process of subsoiling operation.
In order to solve the technical problems, the invention can be realized by the following scheme: a fitting curve type subsoiling shovel handle comprises a connecting section (L) of a shovel handle and a rack, a shovel handle working section (II) and a shovel handle and shovel tip connecting section (S). The shovel shaft edge curve OP, PQ and QR sections are respectively prepared by the following three-section fitting curve equations:
y＝-0.3845x4-700.4x3-4.785×1010x2-1.453×108x-1.654×1010；
y＝8.951×10-5x5-0.02656x4+3.148x3-186.2x2+5496x-6.52×104；
y＝1.702×10-7x7+1.718×10-5x6+7.024×10-5x5+0.01474x4
+0.1653x3+0.944x2+2.342x-442.6
the fitting curve QR mainly plays a role in bearing upturning of the furrow plough at the bottom layer, the curve PQ mainly plays a role in crushing the furrow plough, and the curve OP mainly plays a role in crushing the furrow plough again and reducing disturbance of surface soil. In order to keep the stress uniform, an inner alignment line (FG) of the working section of the shovel shaft and an outer alignment line (MN) of the working section of the shovel shaft are consistent with the cutting edge curve, and the heights of OR and MN are H0(ii) a In order to reduce the farming resistance, the cutting edge angle (alpha) of the cutting edge is selected to be 40 degrees, and the soil entry angle (W) is selected to be 21 degrees; in order to increase the strength of the cutting edge, the edge lines BC and CD adopt convex curves.
The beneficial effects of the invention are as follows: in order to design the shape of a shovel handle of the subsoiler, the influence of a shovel tip on soil is selected to carry out discrete element simulation analysis, the shovel handle is designed to be a fitting curve of the track of soil particles above the shovel tip after the shovel tip acts, the collision quantity of the soil and the shovel handle of the subsoiler is reduced by adapting the shape of the shovel handle of the subsoiler to the track of the soil, and the cutting edge angle and the soil penetration angle of a cutting edge are selected. Can effectively reduce the tillage resistance and the disturbance quantity of surface soil, and achieve the effects of mechanical energy conservation and consumption reduction and soil water storage and soil moisture conservation.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a left side view of fig. 1 of the present invention.
Detailed Description
The invention is further explained below with reference to the figures and examples. A fitting curve type subsoiling shovel handle consists of a connecting section (L) of a shovel handle and a frame, a shovel handle working section (II) and a shovel handle and shovel tip connecting section (S). Wherein, the connecting section (L) of the shovel handle and the frame is provided with 6 pits (I) with the diameter of 12 mm; the shovel handle working sections (OR, MN) are in arc transition connection with a connecting section (L) of the shovel handle and the rack, quenching is carried out on the blade sections (OR, FG), the fitting curve QR mainly plays a role in bearing upturning of furrow slices at the bottom layer, the curve PQ mainly plays a role in crushing the furrow slices, and the curve OP plays a role in crushing the furrow slices again and reducing disturbance of surface soil; the connecting section (S) of the shovel handle and the shovel tip is in transition connection with the tangent line of the working section (OR, FG) of the shovel handle, and the included angle between the connecting section and the horizontal plane is 21 degrees.
Through the research to the subsoiling principle to and the application of traditional subsoiler, to the summary of the great scheduling problem of farming resistance and top soil disturbance volume of subsoiling in-process. The method comprises the steps of simulating the movement of a subsoiling shovel tip in soil by using discrete element software (EDEM), obtaining a fitting curve and a fitting equation of a soil particle movement track above the shovel tip, and optimizing a linear shape by using a linear element design method to obtain a shovel handle working section (OR) curve. Simultaneously, edge lines (BC, CD), a cutting edge angle (alpha) and an soil penetration angle (W) are designed. A large number of soil groove contrast tests and field contrast tests show that the fitting curve type subsoiler handle effectively reduces the soil disturbance amount and the tillage resistance, and meanwhile, the plough bottom layer can be broken, the soil volume weight of the plough bottom layer is reduced, and the requirements of subsoiling operation are met.
The fitting curve type subsoiling shovel handle is made of 65Mn steel and comprises a connecting section (L) of a shovel handle and a frame, a shovel handle working section (II) and a shovel handle and shovel tip connecting section (S). The connecting section (H) of the shovel handle and the frame is a cuboid, the width is 60mm, the length is 310mm, the thickness is 25mm, the tilling depth range is 200 mm-300 mm, and the normal soil penetration depth (H) is 300 mm. The connecting section (L) of the shovel handle and the rack is provided with 6 pits (I) with the diameter of 12mm for fixing bolts. Quenching the blade part (OR, FG), and respectively preparing the cutting edge curves OP, PQ and QR sections of the shovel handle by the following three-section fitting curve equation:
y＝-0.3845x4-700.4x3-4.785×1010x2-1.453×108x-1.654×1010；
y＝8.951×10-5x5-0.02656x4+3.148x3-186.2x2+5496x-6.52×104；
y＝1.702×10-7x7+1.718×10-5x6+7.024×10-5x5+0.01474x4
+0.1653x3+0.944x2+2.342x-442.6
the fitting curve QR mainly plays a role in bearing upturning of the furrow plough at the bottom layer, the curve PQ mainly plays a role in crushing the furrow plough, and the curve OP mainly plays a role in crushing the furrow plough again and reducing disturbance of surface soil. In order to keep the stress uniform, the inner alignment line (FG) of the working section of the shovel shaft and the outer alignment line (MN) of the working section of the shovel shaft are consistent with the cutting edge curve, OR and MN height H0Is 280 mm; in order to reduce the farming resistance, the cutting edge angle (alpha) of the cutting edge is selected to be 40 degrees, and the soil entry angle (W) is selected to be 21 degrees; in order to increase the strength of the cutting edge, the edge lines BC and CD adopt convex curves.
When the shovel is used, the pit (I) of the connecting section (L) of the shovel handle and the rack is fixed with the subsoiling rack through a bolt. Soil tank contrast tests show that the fitting curve type subsoiler handle effectively reduces the soil disturbance amount and the farming resistance, and compared with the traditional broken line type subsoiler handle, the soil disturbance amount is reduced by 53.60%, and the farming resistance is reduced by 36.23%; compared with the traditional arc subsoiling shovel handle, the soil disturbance amount is reduced by 66.18%, and the farming resistance is reduced by 29.18%. The field contrast test shows that the soil returning area of the fitting curve type subsoiler handle is increased by 81.03 percent compared with that of the traditional broken line type subsoiler handle, and is increased by 146.95 percent compared with that of the traditional arc type subsoiler handle. Therefore, soil groove and field experiments verify that the fitted curve type subsoiler handle has small soil disturbance amount and small tillage resistance, and meets the requirement of protective tillage.
Claims (1)
1. The utility model provides a fitting curve type subsoiler handle, comprises shovel handle and frame linkage segment H, shovel handle working segment II, shovel handle and shovel point linkage segment R, and its characterized in that, shovel handle blade curve OP, PQ, QR section are made by following three-section fitting curve equation respectively:
y＝-0.3845x4-700.4x3-4.785×1010x2-1.453×108x-1.654×1010；
y＝8.951×10-5x5-0.02656x4+3.148x3-186.2x2+5496x-6.52×104；
y＝1.702×10-7x7+1.718×10-5x6+7.024×10-5x5+0.01474x4+0.1653x3+0.944x2+2.342x-442.6
the inner alignment line FG of the working section of the shovel shaft and the outer alignment line MN of the working section of the shovel shaft are consistent with the cutting edge curve;
in the shovel handle working section II, a shovel handle cutting edge curve OR and an inner alignment line FG blade-shaped line of the shovel handle working section are designed into an outward convex curve, and a cutting blade angle (alpha) is 40 degrees;
the included angle between the shovel handle and the shovel tip connecting section R and the horizontal plane is 21 degrees.
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| CN201710740728.1A CN107439061B (en) | 2017-08-25 | 2017-08-25 | Fitting curve type subsoiler handle |
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| CN201710740728.1A CN107439061B (en) | 2017-08-25 | 2017-08-25 | Fitting curve type subsoiler handle |
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| CN107439061B true CN107439061B (en) | 2022-03-22 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108391473A (en) * | 2018-02-13 | 2018-08-14 | 河南科技大学 | A kind of spade cutting edge member line is the subsoiling spade of bionical curve |
| CN108271437B (en) * | 2018-03-26 | 2023-10-31 | 吉林省农业机械研究院 | A composite subsoiling shovel with soil covering function |
| CN108738398B (en) * | 2018-05-25 | 2021-05-28 | 董晓魏 | Be suitable for deep ploughing sword in glutinous soil |
| CN108848685A (en) * | 2018-06-14 | 2018-11-23 | 湖北文理学院 | A kind of deep soil loosing shovel handle structure and subsoiling spade |
| CN111247885B (en) * | 2020-01-18 | 2022-07-01 | 东北农业大学 | Sliding cutting-interaction type layered deep scarification device |
| CN112492898B (en) * | 2020-12-14 | 2024-05-07 | 内蒙古农业大学 | High-compactness grassland soil-root system composite soil layer improvement tool and method |
| NL2033168B1 (en) * | 2022-09-28 | 2023-07-10 | Univ Qingdao Agricultural | Design method for double-wing subsoiling shovel based on topology optimization |
| NL2033205B1 (en) * | 2022-09-30 | 2023-07-10 | Univ Qingdao Agricultural | Optimization method for subsoiling shovel |
| CN118339952A (en) * | 2024-05-09 | 2024-07-16 | 天津理工大学 | A deep tiller with intelligent detection and adaptive tillage depth adjustment |
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| CN1583371A (en) * | 2004-06-04 | 2005-02-23 | 吉林大学 | Bionic spade handle for reducing resistance and loosing deeply |
| CN203633064U (en) * | 2013-12-24 | 2014-06-11 | 西北农林科技大学 | Bionic resistance-reducing subsoiler handle based on power function curve |
| CN105359643A (en) * | 2015-11-10 | 2016-03-02 | 西北农林科技大学 | Polynomial curve based bionic resistance-reducing sub-soiling shovel |
| CN205161039U (en) * | 2015-11-10 | 2016-04-20 | 西北农林科技大学 | Bionical drag reduction subsoiler based on polynomial curve |
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2017
- 2017-08-25 CN CN201710740728.1A patent/CN107439061B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| CN1583371A (en) * | 2004-06-04 | 2005-02-23 | 吉林大学 | Bionic spade handle for reducing resistance and loosing deeply |
| CN203633064U (en) * | 2013-12-24 | 2014-06-11 | 西北农林科技大学 | Bionic resistance-reducing subsoiler handle based on power function curve |
| CN105359643A (en) * | 2015-11-10 | 2016-03-02 | 西北农林科技大学 | Polynomial curve based bionic resistance-reducing sub-soiling shovel |
| CN205161039U (en) * | 2015-11-10 | 2016-04-20 | 西北农林科技大学 | Bionical drag reduction subsoiler based on polynomial curve |
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