The main function of the wheel loader is to shovel and load the loose materials and carry out short distance transportation. It is one of the fastest growing machines, the largest sales volume and the largest market demand for construction machinery. The most commonly seen wheel loader is the crawler loader. Compared with crawler, it has the advantages of good maneuverability, no damage to the road surface and convenient operation. So the wheel loader has been widely used.
Loaders can be divided into power system, mechanical system, hydraulic system and control system.
As an organic whole, the performance of loader is not only related to the performance of the mechanical parts of the working device, but also related to the performance of the hydraulic system and the control system.
Power system: the original power of the loader is generally provided by the diesel engine. The diesel engine has the characteristics of reliable work, hard power characteristic curve and fuel economy. It meets the requirements of the loader's bad working conditions and the variable load.
Mechanical system: mainly includes walking device, steering mechanism and working device. Hydraulic system: the function of the system is to take the engine's mechanical energy with fuel as the medium, use the oil pump to change to the hydraulic energy, and then transfer to the oil cylinder, the oil motor and so on to the mechanical energy.
Control system: the control system is a control system for engines, hydraulic pumps, multiple directional valves and actuators.
Hydraulic control drive mechanism is a device that converts the power or mechanical energy of micro power into powerful power of hydraulic energy and mechanical energy in hydraulic control system. It is composed of hydraulic power amplifying element, hydraulic actuator and load, and is the core of static and dynamic analysis in hydraulic system.