1. According to whether the flow can be adjusted, it can be divided into: variable pump and fixed pump. The output flow can be adjusted according to needs is called a variable pump, and the flow cannot be adjusted is called a quantitative pump.
2. According to the commonly used pump structure in hydraulic system, it is divided into three types: gear pump, vane pump and plunger pump.
Generally, plunger pumps are used when gear pumps and vane pumps cannot meet the requirements. There are other types of hydraulic pumps, such as screw pumps, but their applications are not as common as the above three types.
