CN201450743U - Bionic subsoil variable fertilizer spreader - Google Patents

Abstract

The utility model relates to a bionic subsoil variable fertilizer, which belongs to the category of agricultural machinery. Square tube double-girder frame frame (2) includes front beam and rear beam, supporting ground wheel (1), bionic drag-reducing subsoiler (6), fertilization device (4), marker (5) and intelligent variable fertilization The control system is installed on the front beam; the parallel four-bar mechanism type floating ridging support (8), tooth wing type ridging device (11), fixed bracket (12) and suppressor (13) are installed on the rear beam; subsoiling The device (6) includes a bionic drag reducing shovel handle and a double-wing shovel tip, and the bionic drag reducing shovel handle has a double parabola coupled leading curve.

Description

Bionic subsoil variable fertilizer spreader

technical field

The utility model relates to a bionic subsoil variable fertilizer applicator, which belongs to agricultural farming machines.

Background technique

Subsoiling operation is one of the operations with the largest energy consumption per unit tillage width in field operations, and the power of subsoiling operation is mainly consumed by the cutting and squeezing action of the working parts on the soil. The soil loosening methods of the subsoiler mainly include extrusion loosening and vibrating loosening. The mechanical subsoiling plow achieves the purpose of subsoiling by cutting the soil with the plow body. The vibrating subsoiler drives the eccentric vibrator by the power output shaft of the tractor to make the plow vibrate to reduce working resistance. The new subsoilers used abroad mainly include bent-leg plows, vibrating subsoilers, and active-passive combined tillage machines. The subsoilers developed in my country have the following types: single column chisel shovel type, inverted trapezoidal omnidirectional type, adjustable wing shovel type, rotary tillage type and vibration type. Most of the machines used in production are compound work tools.

The main soil processing components of a conventional spaced subsoiler are the bladed handle and the subsoiler mounted on its lower end. For subsoiling operations with a tillage depth of 20-40cm, the shovel handle is the main source of tillage resistance. In order to reduce the working resistance of the tillage parts, some people have studied the working performance of the vibrating subsoiling parts, but the vibrating system makes the structure of the machine complicated and the cost is correspondingly increased. The cutting edge of the subsoiling shovel handle recommended by the national standard is a curve composed of R257 and R284 arcs, and there are also cutting edge lines composed of straight lines and broken lines in production. If the drag reduction performance can be improved on the premise of ensuring the quality of soil subsoiling, it will be of great significance for saving energy consumption, reducing the configuration level of supporting power and expanding the application range of subsoiling tillage technology.

Conventional fertilization is to adjust the amount of fertilizer applied before an operation, and a fixed amount of fertilizer is used for the entire field or even the entire operation season. However, there are differences in the nutrient composition of farmland soil. The nutrient content of soil in different plots and different locations of the same plot is inconsistent. The soil in the same location also has different characteristics in different seasons. Therefore, quantitative fertilization causes waste of fertilizer and pollution of soil environment.

Contents of the invention

In order to solve the problems of high energy consumption and low utilization rate of chemical fertilizers in subsoiling and fertilizing operations, the utility model provides a bionic subsoiling variable fertilizer applicator. The bionic rent-reducing subsoiling components and intelligent variable fertilization system are adopted to realize variable fertilization according to soil nutrition information and improve the comprehensive utilization rate of machines and tools.

The above-mentioned purpose of the utility model can be achieved through the following technical solutions, which are described below in conjunction with the accompanying drawings.

A bionic subsoiling variable fertilization machine, comprising a rubber support wheel 1, a square tube double beam frame type frame 2, a fertilization device 4, a marking device 5, a subsoiling device 6, a parallel four-bar mechanism type floating ridge stand 8, Tooth-wing type ridge raising device 11, suppressor 13, profiling wheel 14 and intelligent variable fertilization control system, the square tube double-girder frame-type frame 2 includes a front beam and a rear beam, supporting ground wheels 1, bionic drag reduction The subsoiler 6, the fertilization device 4, the marker 5 and the intelligent variable fertilization control system are installed on the front beam; the parallel four-bar mechanism type floating ridging support 8, the tooth wing type ridging device 11, and the fixed support 12 and the bionic flexible packer 13 are installed on the rear beam; the subsoiler 6 includes a bionic drag-reducing shovel handle and a double-wing shovel tip, and the bionic drag-reducing shovel handle has a double-parabolic coupling-shaped leading curve. The profiling wheel (14) is installed on the rear beam of the frame (2) through a parallel four-bar mechanism type floating ridge support (8).

The intelligent control variable fertilization system includes a hydraulic motor 3, an electro-hydraulic proportional speed regulating valve 9, an oil filter 7, a fertilizer discharge device 4 and an intelligent variable fertilization controller. The intelligent variable fertilization controller determines the amount of fertilizer applied according to the fertilization decision, Output control signals for machine position and working speed, adjust the output flow of electro-hydraulic proportional speed regulating valve 9 in real time, adjust the speed of hydraulic motor 3 or stepper motor, and change the working speed of fertilization device 4.

The described suppressor 13 is installed on the rear beam of the frame 2 through the fixed bracket 12. The suppressor 13 is mainly composed of a suppressor roller, a swing support rod, a pressure spring and an adjustment guide rod. The rubber jacket is formed, and the rubber jacket is a cylindrical sleeve.

The utility model has the following positive effects:

(1) The combined operation of this machine can complete the four processes of subsoiling, fertilization, ridging and suppression at one time. It has the characteristics of one machine with multiple functions and strong versatility. It saves time and energy, and is beneficial to drought resistance and moisture conservation.

(2) The subsoiling shovel and ridge plow of this machine have good soil penetration performance, and the resistance of the subsoiler is small, which reduces energy consumption. The compactor has good performance in compacting and crushing soil.

(3) The variable fertilization of different soils realized by the intelligent variable fertilization system makes the amount of fertilization accurate and reasonable, which can effectively avoid environmental pollution and waste caused by excessive fertilization, and increase the utilization rate of fertilizers by 10%-30%, thereby reducing production costs. Increase food production.

Description of drawings

Fig. 1 Bionic drag reduction subsoiling shovel handle.

Figure 2 is a schematic diagram of the electro-hydraulic proportional valve-controlled motor speed control system.

Figure 3 is a diagram of the components of the control system.

Fig. 4 is the overall schematic diagram of the utility model.

Figure 5 is the overall top view of the utility model.

Fig. 6 is a schematic diagram of the support ground wheel support.

Fig. 7 The structural diagram of the bionic subsoiler.

Fig. 8 is a schematic diagram of a parallel four-bar profiling mechanism and a ridge shovel.

Figure 9 Schematic diagram of the packer assembly.

In the figure: 1. Rubber support ground wheel, 2. Square tube double beam frame frame, 3. Hydraulic motor, 4. Fertilization device, 5. Marker, 6. Subsoiler, 7. Oil filter, 8 .Parallel four-bar mechanism type floating ridging support, 9. Proportional speed control valve, 10. Floating support, 11. Tooth wing type ridging device, 12. Fixed frame, 13. Compressor, 14. Profiling wheel, 15. Pedal, 16. Bionic flexible pressure roller, 17. Ground wheel support fixing hole, 18. Ground wheel support, 19. Ground wheel support adjustment hole 20. Subsoiling shovel support, 21. Fertilization pipe, 22. Swing support Rod, 23. pressure spring and 24. adjust guide rod.

Detailed ways

The specific content of the utility model is further described in conjunction with the accompanying drawings.

The core working part of the utility model adopts the bionic drag-reducing subsoiling shovel handle and the intelligent control variable fertilization system. Its structure has the following characteristics:

1. The subsoiler 6 includes a bionic drag-reducing shovel handle and a double-wing shovel tip. The bionic drag-reducing shovel handle is designed according to the research results of bionics, and has a double-parabolic coupling-shaped bionic leading curve (invention patent has been obtained).

The working resistance, soil loosening range, and soil breaking performance of the subsoiling shovel are obviously affected by the structural form of the subsoiling shovel handle in addition to the effect of the shovel tip; through reasonable structural design, especially the contact of the subsoiling shovel handle The geometric structure design of the soil surface can reduce the working resistance of the subsoiling operation and improve its energy-saving performance. Under the premise of ensuring the required subsoiling quality, improving the structure design of the subsoiling shovel handle is a convenient and effective way to improve its energy-saving performance. Traditional The subsoiling shovel handle of the subsoiling shovel generally uses a straight line, broken line or arc transition section structure to connect the subsoiling shovel tip and the frame, and the soil cultivation resistance of the machine tool remains high. Studies have found that some soil cave animals in nature such as Mus musculus, Mus musculus, Voles, mole crickets, dung beetles, pangolins, etc. have evolved well-developed digging feet, which have gradually formed a curved shape with a specific curvature, have a very strong ability to dig caves, and show excellent drag reduction functions, which is a great contribution to improving deep The soil-touching surface geometry of loose components and the optimization of their mechanical properties during cutting provide the basis for bionic research and design.

Through the experimental research on the in-vivo and in-vitro dynamic desorption behaviors of soil animals such as voles, pangolins, and mole crickets, the mechanism of biological viscosity and drag reduction, such as low resistance, no soil, and small soil disturbance, was found out, and selected Structural parameters and materials of subsoiler handles. The Daurian ground squirrel (a kind of field mouse) with excellent digging and drag-reducing functions was selected as the research object, and the morphological characteristics of its claws and toes—especially the geometric characteristics of the longitudinal profile of the claws and toes—were observed and analyzed, and the fundamentals of its curvature changes were studied. law. The results show that the inner contour line of this animal’s excavated paw toe (the alignment of the paw toe’s contact surface) is a curve of variable curvature, and the change law can be approximately regarded as the coupling of two parabolas. The curvature change trend line of the toe’s inner contour line is given by From the tip of the paw toe to the body of the paw toe, there are two obvious fluctuations. Tests show that the bionic drag-reducing subsoiling shovel handle can reduce the traction force by 3-8% compared with the traditional shovel handle.

Based on the test results of the curved contour shape of the vole's toe, a bionic drag-reducing subsoiling shovel handle structure was designed. Referring to Figure 1, the shovel handle is composed of the frame connecting section H, the shovel handle working section PQ, MN and the shovel tip connecting section R. The front part of the inner alignment PQ is provided with a cutting edge with a cutting edge angle of 60°, the front contour line of the cutting edge is parallel to the inner alignment PQ of the working section of the shovel handle, and the angle W between the shovel tip installation plane and the horizontal plane of the shovel tip connection section is 20°. It is characterized in that: the ratio L/D of the shovel handle extension L to the tillage depth D=0.68～0.95; the upper end point P of the inner directrix PQ is the coordinate origin, and the concave direction of the PQ curve is the positive direction of the x-axis. The positive direction of the y-axis is to establish a coordinate system vertically upward, and the inner alignment PQ of the working section of the shovel handle and the outer alignment MN of the working section of the shovel handle are respectively determined according to the following two curve equations:

${\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 5.3074</span>}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 14.4421</span>}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 13.8507</span>}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5.8984</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; ;</span>$

${\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 4.136212</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 5.538781</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2.519441</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 0.701217</span>}{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; ;</span>$

In the formula: D ₁ is the vertical height of the inner alignment line PQ; the value range of x satisfies 0≤x ₁ ≤0.647831D ₁ and -0.188855D ₁ ≤x ₂ ≤0.606158D ₁ .

The bionic resistance-reducing subsoiling shovel handle is cast from ZG45, and the effect of reducing soil tillage resistance can be achieved by controlling the above structural parameters.

2. The intelligent control variable fertilization system adopts electro-hydraulic proportional speed control valve and hydraulic motor, and combines the advantages of PLC controller with high speed, safety, stability, and adaptability to harsh working environments to construct a hydraulic transmission speed control system, and conduct hardware design and software development to adapt to Requirements for stepless speed regulation of variable fertilization in farmland operating environment.

The working process of variable fertilization: first, the PLC controller collects the operation position, travel speed and current position fertilization decision information of the machine tool according to the GPS signal; Hydraulic motor and fertilizer discharger rotate speed, so as to achieve the purpose of automatic variable fertilization according to soil conditions in different locations.

1) Variable fertilization control system

The variable fertilization control system is mainly composed of a proportional amplifier, an electro-hydraulic proportional valve, a hydraulic motor and an oil filter. Its principle is shown in Figure 2. By changing the proportional relationship between the oil return and oil output of the electro-hydraulic proportional valve, the flow rate through the hydraulic motor is changed, and the working speed of the fertilization actuator is controlled, so as to realize the speed regulation of the hydraulic system.

The speed command input by the controller is given by the voltage signal. The voltage difference between the system input speed command voltage and the output speed feedback voltage, that is, the speed difference, is amplified by the proportional amplifier, converted by the electro-hydraulic proportional speed control valve and output hydraulic energy, driving the hydraulic motor, and driving the load to deflect in the direction of eliminating the speed deviation. A comparator is used to measure the speed difference between the input speed and the output speed. The output speed is measured by the feedback speed sensor, and then fed back to the main channel. When the speed signal of the speed sensor is consistent with the input command, it will change according to the law given by the input voltage command.

2) Hydraulic system

The power source of the hydraulic system adopts the hydraulic pump that comes with the tractor, the energy control device is an electro-hydraulic proportional speed regulating valve, and the energy output device (ie, the actuator) is a hydraulic motor. Referring to Figure 3, according to the control requirements, the high-pressure oil output by the hydraulic pump is divided into two routes through the oil filter in the speed control valve: one route leads to the hydraulic motor from the _P2 port to drive the fertilizer discharger; the other route to the T port Flow back to tank. The size of the two flows is controlled by a proportional valve. The output of the first _P2 is proportional to the electrical signal supplied by the PLC controller. The larger the supply signal, the greater the opening of _P2 , the greater the flow and speed of the hydraulic motor, and the corresponding opening of T and the return oil flow. On the contrary, the opening of the proportional valve and the speed of the hydraulic motor change inversely.

The system pressure is determined by the load: the greater the load, the greater the system pressure. The maximum working pressure of the hydraulic system is determined by the pressure of the hydraulic components. The pressure of the system is jointly adjusted by the proportional speed regulating valve and the manual overflow valve to form a two-stage pressure protection system. The maximum pressure of the hydraulic system is jointly adjusted by setting the overflow pressure in the speed regulating valve and the spring pressure at the top of the pilot valve. In order to protect the hydraulic motor and hydraulic pump, set the input current of the pressure valve to 0.69A under the condition that the pilot valve spring is moderately tense. When the system pressure reaches 10MPa, the speed control valve will completely overflow and return the oil to make the system pressure zero.

3) Hydraulic motor

The hydraulic motor is a component that converts hydraulic energy into mechanical energy. According to the structure of the hydraulic motor, it can be divided into gear type, vane type, plunger type, etc. The main consideration when selecting a hydraulic motor is the matching of its displacement, pressure and torque with the system. The supporting power of this system is a tractor with more than 80 horsepower, such as Tiantuo John Deere TN804 tractor, and the rated pressure of its hydraulic pump is 15MP. Under normal working conditions, the maximum torque of the fertilizer discharger is 10N.M, the common fertilization speed is 10-120r/min, the radius ratio of the big and small sprockets is 3:1, so the torque ratio is 1:3, and the pressure established by the hydraulic system is 10/min. 3N.M, the design safety factor is 2, so a hydraulic motor with a rated pressure of 10Mp is used.

4) Speed control valve

The hydraulic valves in the valve control system mainly adopt ordinary hydraulic valves, electro-hydraulic proportional valves and electro-hydraulic servo valves. According to actual needs, select the proportional electro-hydraulic pressure flow control valve.

3. The suppressor is mainly composed of a suppressor roller, a swing support rod, a pressure spring and an adjustment guide rod. The pressure roller consists of a roller body and a rubber jacket. The rubber jacket is a cylindrical rubber sleeve. The pressure roller makes the soil shape regular and uniform in hardness after operation.

Below with 44.1～58.8kW crawler belt, 66.5～88.2kW four-wheel drive tractor supporting 4 row bionic subsoiling variable fertilizers (referring to Fig. 4,5) as example further illustrate the implementation process of the present utility model. The machine includes rubber support wheel 1, square tube double-beam frame frame 2, hydraulic motor 3, fertilization device 4, marker 5, subsoiler 6, oil filter 7, parallel four-bar mechanism type floating ridge Bracket 8, proportional speed regulating valve 9, tooth wing type 11, suppressor 13, profiling wheel 14, pedal 15, suppressing roller 16 and intelligent variable fertilization control system, etc. The machine can complete subsoiling, deep fertilization, ridging and suppression at one time.

The double-girder frame frame 2 welded by 80×80×8 square steel pipes includes a front beam and a rear beam. Variable fertilization control components, etc., the rear beam is equipped with a parallel four-bar mechanism type floating ridge support 8, a tooth wing type ridge shovel 11, a fixed support 12 and a suppressor 13, etc. The square tube double beam frame frame is supported by a pair of rubber support wheels. The frame is equipped with a bionic drag-reducing subsoiling shovel, and the working depth can be adjusted between 18-35cm.

Referring to Fig. 6, the ground wheel supported by rubber is fixed on the front beam of the frame 2 through the ground wheel support 18, the support arm of the ground wheel can rotate around the fixed hole 17 of the ground wheel support, and is distributed through an arc concentric with the fixed hole. The different adjusting holes 19 of the different adjusting holes can adjust the height of the frame, and can also play the role of adjusting the depth of subsoiling.

Referring to Fig. 7, subsoiling parts 6 are fixed on frame 2 front beams and if 5 rows of furrows are subsoiled, it should be 5 groups of subsoiling parts, and the outermost 2 groups can be fixed on the frame back beam. The main subsoiling shovel of this part adopts the bionic drag-reducing subsoiling shovel handle, and the fertilization conduit can be connected to the fertilization pipe 21 on the rear side of the shovel handle. Accurate adjustment of the depth of subsoiling is realized by adjusting the upper and lower positions of the subsoiling shovel handle in the fixed storage of the subsoiling shovel support 20 .

Referring to Fig. 8, tooth-wing type ridge-making ridge shovels (5 groups for subsoiling ridges and 4 groups for subsoiling ridges) are fixed on the rear beam of frame 2 through movable beam 10 and parallel four-bar profiling mechanism, and the ridge height It is 12-20cm. During operation, the profiling wheel 14 moves with the undulation of the ground, and the parallel four-bar mechanism makes the movable beam 10 move up and down to ensure that the ridge depth remains stable with the undulation of the ground. The working depth of the plow body can be adjusted by adjusting the installation height of profiling wheel 14 and ridging shovel 11.

Referring to FIG. 9 , the suppressor 13 is installed on the rear beam of the frame 2 through a fixed bracket 12 , and is mainly composed of a suppressor roller 16 , a swing strut 22 , a pressure spring 23 and an adjustment guide rod 24 . The pressing roller is composed of a roller body and a rubber jacket on the outer surface of the roller, and the rubber jacket is a cylindrical sleeve. The pressing roller makes the rolled soil regular in shape and uniform in hardness.

Referring to Figure 3, the intelligent control variable fertilization system consists of a control cabinet (installed on a tractor), a hydraulic motor 3, an electro-hydraulic proportional speed control valve 9, an oil filter 7, a fertilizer discharge device 4, and an intelligent variable fertilization controller. During operation, the gear pump of the tractor drives the hydraulic motor to rotate. The intelligent variable fertilization controller outputs the control signal according to the fertilization amount determined by the fertilization decision, the machine position and the working speed, adjusts the output flow of the electro-hydraulic proportional speed regulating valve 9 in real time, adjusts the speed of the hydraulic motor 3 or stepper motor, and changes the fertilizer discharge device 4 The working speed, the amount of fertilizer discharge is proportional to the rotation speed of the fertilizer discharge shaft, so as to achieve the purpose of adjusting the amount of fertilizer in real time according to the soil nutrient requirements.

The output pressure of the hydraulic pump is 15MPa, and the hydraulic motor is allowed to withstand a peak pressure of 10MPa. BYLZ type proportional electro-hydraulic pressure flow control valve refer to Figure 3. It uses two electrical signals to control the pressure of the hydraulic system and the flow rate of the proportional valve respectively. It tracks the load pressure with a small pressure difference and controls the pump pressure. It is an energy-saving valve. .

Claims (3)

1. A bionic subsoiling variable fertilization machine, including rubber support wheels (1), square tube double beam frame type frame (2), fertilization device (4), marking device (5), subsoiling device (6) , a parallel four-bar mechanism type floating ridging support (8), a tooth wing type ridging device (11), a suppressor (13), a profiling wheel (14) and an intelligent variable fertilization control system, which is characterized in that the above Square tube double-girder frame frame (2) includes front beam and rear beam, supporting ground wheel (1), bionic drag-reducing subsoiler (6), fertilization device (4), marker (5) and intelligent variable fertilization The control system is installed on the front beam; the parallel four-bar mechanism type floating ridging support (8), tooth wing type ridging device (11), fixed bracket (12) and suppressor (13) are installed on the rear beam The subsoiler (6) includes a bionic drag-reducing shovel handle and a double-wing shovel tip, the bionic drag-reducing shovel handle has a double parabolic coupling-shaped leading curve, and the profiling wheel (14) passes through a parallel four-bar mechanism type floating ridge support (8) be installed on the frame (2) rear beam. 2. A bionic deep pine variable fertilization machine according to claim 1, characterized in that the intelligent control variable fertilization system includes a hydraulic motor (3), an electro-hydraulic proportional speed regulating valve (9), an oil filter ( 7), fertilizer discharge device (4) and intelligent variable fertilization controller. 3. A kind of bionic subsoiling variable fertilizer applicator according to claim 1, characterized in that said packer (13) is installed on the rear beam of the frame (2) through a fixed bracket (12), and the packer (13) ) is mainly composed of a pressure roller, a swing rod, a pressure spring and an adjustment guide rod. The pressure roller is composed of a roller body and a rubber jacket on the outer surface of the roller body. The rubber jacket is a cylindrical sleeve.

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