Source：Shuntec Update：2021-12-17-09:55:40Views：115
Hydraulic systems are classified in different ways. The following is the common hydraulic systems:
1、According to the number of hydraulic pumps in the system, they can be divided into single pump system, double pump system and multiple pump system.
2、According to the different types of hydraulic pumps used, they can be divided into fixed pump systems and variable pump systems. The advantage of the variable pump is that it can make full use of the power of the engine within the adjustment range, but its structure and manufacturing process are complex, and the cost is high. It can be divided into manual variables, controllable variables, servo variables, pressure compensation variables, constant pressure variables, hydraulic variables, and many other ways.
3、According to the oil circulation mode, the hydraulic system can be divided into an open system and a closed system. The open system means that the hydraulic pump sucks oil from the oil tank. After the oil passes through various control valves. It drives the hydraulic actuators and returns the oil to the oil tank through the reversing valve. This kind of system has a relatively simple structure. It can play the role of heat dissipation of the oil tank and precipitation of impurities. However, because the oil is often in contact with air, it is easy for air to penetrate into the system, that resulting in unsteady movement of actuators and other consequences. The open system has a large oil tank and the oil pump has good self-priming performance. In a closed system, the oil inlet pipe of the hydraulic pump is directly connected with the oil return pipe of the actuator, and the working fluid is in a closed loop in the pipeline of the system.
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