The John Deere 4720 self-propelled sprayer is a unique high-tech, high-performance, high-efficiency product uniquely designed by Deere, and manufactured by Deere in the United States. It was introduced in the American market in 2004. The situation in short supply. At present, China's introduction and use have attracted the attention of all localities. We now introduce to the majority of users the main performance characteristics of the JD4720 self-propelled sprayer.
1. John Deere POWERTECH six-cylinder turbocharged diesel engine
JD4720 self-propelled sprayer adopts the second generation John Deere 6.8-liter 6-cylinder turbocharged 6-cylinder diesel engine, rated power 165.5KW (225 hp), rated speed 2100r/min, after-cooled, intake and exhaust The gas is an interchangeable embedded valve seat. The engine is tested by the TIER-II emission standard and is an environmentally friendly engine. At the same time, an innovative "high pressure common rail" fuel injection system is adopted to increase the fuel injection pressure so that the fuel can achieve better atomization effects. In addition, the full electronically controlled load sensing oil control system is used to set the phase size of the load through induction work. Adapted to the amount of fuel injection, thereby reducing engine speed fluctuations, reducing downshifts, while improving fuel economy, improve operating efficiency. When the operating speed is 1500-2100r/min, the torque reserve is 43%. When operating on soft soil, the horsepower increases by 5%. Deere's unique "field cruising" operation can make the engine operation constant, thus ensuring the stability of the field operation speed and the output shaft speed, which is more meaningful for variable application of pesticides in precision agriculture. Accurate agricultural equipment interfaces are available, and satellite receivers, display processors and other equipment can be installed according to user needs.
2. Transmission system
Hydrostatic transmission, front and rear 75ml double pump, 4 60ml variable motor, planetary gear deceleration hub and electro-hydraulic shift. The hydraulic drive system uses a central, sealed, pressure-flow compensation type to reduce engine and hydraulic system loads. The speed is 4 zones of infinitely variable speed, according to the selected tires to determine the speed, such as the use of 380/90R46 and 420/80R46 standard tires, engine speed 2400r/min, rated speed at no load. Section 1 is 0-21.9km/h (low-lying wetland and slope environment); Section 2 is 0-28km/h (normal environment operation); Section 3 is 0-32.5km/h (normal environment operation); Section 4 is 0-47.6 km/h (transportation status). Four-wheeled fighter aircraft landing gears are independently suspended and equipped with air springs to automatically adjust the balance. The track can be independently hydraulically adjusted in the cab and can be adjusted to any track from 3048mm to 3861mm. The rear wheels can be adjusted to different track lengths and can be adjusted to the same track. Standard sizes for tires are 380/90R46 and 420/80R46. Optional tire 320/90R46 and low-pressure tire 20.8/38 are available. Advanced braking and braking system meets ASAE standards.
3. SPRAYSTARTM system
The SPRAYSTARTM system is an electronic module with a universal display and a universal keyboard that can be used to display chassis or spray system information. Its main purpose is to provide a display for various sprayer sensors, and it can also display a variety of sensor information. Spray system information display: Overview of sprayer operation (area for spraying, amount of liquid to be sprayed, duration of spraying, area per hour for spraying, and amount of spray per hour), number of hours worked, spray flow inspection, technology Diagnostic, job date and time, optional radar sensor.
4. Spray system
Spray system consists of medicine tank, suction manifold, suction strainer, centrifugal pump, high and low flow valve, filter, high
Pressure manifold, mixed tank funnel, nozzle shutoff and nozzle composition.
The material of the medicine tank is polyethylene (or stainless steel). The capacity is 3028L. There are two stirring jet positions at the bottom of the medicine tank. The jet produces a strong stirring effect in the medicine spray, so that the pesticide is always kept in suspension. The suction manifold has 3 functions: 1 The drug pump inhales the dose from the canister and pressurizes the spray system. 2 The drug pump inhales clean water through a quick-filling accessory and fills the canister. 3 The drug pump sucks clean water from the clean water tank to flush the spray system.
The drug pump is driven by a centrifugal hydraulic motor. The boom widths are 18.3, 24.4, and 27.4m, respectively, and hydraulic telescopic booms have a retractable time of 8-10 seconds. Types of nozzles include: fan-shaped fog cone nozzles, equal-width nozzles, hollow cone nozzles, and spray nozzles. The distance between the nozzles is 508mm, and the height of the nozzle from the ground is 684-2197mm, which is higher than the spray surface 457-559mm when spraying. The spray nozzles are 1016mm apart, with an optional triple nozzle holder and check valve. Prepare a 450L flushing tank and a 24.6L mixed tank.
5. Bubble marker
Foam tracker from foam tank, air compressor (12V system) power unit or with external compression
The control unit of the air tank (mechanical air system) consists of two liquid traps or demisters and interconnecting wires and hoses. The satellite receiver can also be optionally installed. The monitor can automatically find the line with the most software equipment. The field operation can be switched to the 90-degree sprayer automatically and the spray operation can be performed. There will be no heavy spray or missing spray at night when the farmer is busy.
6. Deere's unique COMFORTGARD component cab (optional)
The Pesticide Protection Cab has powerful pesticide protection components and a new air purification system.
The only cab that satisfies the SAE*S525 standard strictly, and has passed the US EPA labor protection standard certification, has also been recognized by the California pesticide protection department. This cab is equipped with advanced pesticide protection equipment. It eliminates all dust, mold, sand and airborne allergens. Chemical ions are pre-purified by charcoal filtering when entering external and internal air purification systems. Give the driver super protection.
Standard comfort-protected cab, man-machine integrated design, adjustable steering column, adjustable steering wheel with 510-pitch, 10 field work lights, standard radio, optional other audio equipment (VCD, CD, TV Etc.) Air filters and environmentally friendly air-conditioning equipment, refrigerator R134A, a complete information command platform system, the cab at a glance at operation, the radius of the turn 7.32m, the gap is 1.5m. The weight of the whole machine is 9707kg.