Agricultural machine is an indispensable part in agriculture production machines. As an execution component in the hydraulic system, hydraulic cylinders can easily achieve reciprocating linear movements and thus are widely applied to realize the actions such as lifting of the rear suspension device of tractors and headers of combined harvesters and adjusting of reels and full-hydraulic steering.
The hydraulic components of agriculture machines have the outstanding advantages that the unit power mass is small, the size is small, large torque is easy to obtain, stepless speed change can be realized, and overload is easy to prevent; and meanwhile, along with the customization and completion of various standard parts and the standardization, serialization and versatility of various components, agriculture machine hydraulic components are widely applied to agriculture machines such as agricultural combine, agriculture product processing machines and the like.
The hydraulic system of modern tractors and combined harvesters is mainly driven by a gear pump and includes hydraulic steering and hydraulic operation, and in a hydraulic steering system, a full-hydraulic steering gear controls steering hydraulic cylinders to achieve steering in most cases.
- Stepless speed changing of combined harvesters
The header of the combined harvester is used for cutting crops, and the header is linked with a threshing part through hinge shafts. The mechanical transmission technology is adopted in the combined harvesters previous, and the previous harvesters are slow, low in efficiency and poor in quality. Along with the development of the hydraulic technology, hydraulic transmission is adopted for the operation system of the modern combined harvesters, drivers can adjust lifting of the header on seat through the hydraulic cylinder based on the stepless speed changing feature of the hydraulic technology, stepless speed changing can be achieved, the operator can select the running speed based on the height and density of crops, and farmers can complete reaping and threshing with single operation, so that manpower and material resources are saved, and the burden of farmers is greatly relieved.
- The adjusting system of rice planter
The hydraulic system of the rice planter mainly plays the role of performing hydraulic profiling planting and making the planter to act as the human hands without hurting the roots or the seedlings, and the planting effect is good. The planting depth can be ensured and the basic characteristics of stable, straight, uniform, and shallow can be realized through adjustment of the hydraulic mechanism according to different soil properties. The hydraulic pump is the device to generate hydraulic power in the hydraulic device, and it changes mechanical energy into hydraulic energy to generate high-pressure oil for work of the hydraulic cylinders. A distributer serves as a control mechanism in the hydraulic device, and it controls the flow direction of the hydraulic oil. The hydraulic cylinders serve as the working mechanism of the hydraulic device, and it transforms the hydraulic energy into the mechanical energy driving the piston of the hydraulic cylinder to carry out linear movement.
- Full-hydraulic steering
By means of the steering device with the full-hydraulic steering device, hydraulic oil pipes are adopted for conducting remote control. The steering wheel is connected with the full-hydraulic steering device, the steering hydraulic cylinder is connected with the drive wheels, the two oil pipes conveys the pressure oil of the steering device to the corresponding chambers of the steering hydraulic cylinders to achieve full-hydraulic steering. As the steering mechanism is connected through the oil pipes, and thus the steering mechanism is easy to arrange. In this way, operation is convenient and flexible, the structure is compact, and the steering performance can be ensured while the engine is flameout.
Selection of the hydraulic cylinder of the Agriculture machines
The bore diameter, stroke, installation mode and functions of the hydraulic cylinders need to be considered first, and then the key installation dimensions and other dimensions need to be determined.
WEITAI Hydraulic Cylinders:
- High quality Cold Drawn steel tube, with good rigidity.
- CNC Rolled tube inner surface, with roughness of 0.2~0.4um.
- Superior strength chrome-plated rod, anticorrosion for a long life.
- High grade Ductile Iron bar directly machined Gland and Piston, with high strength.
- High tensile strength tie rods with rolled threads for durability.
- Dual base-plate oil ports
- 100% factory tested under at least 1.5 times of the rated pressure