Electric hydraulic pump is a hydraulic component that provides pressurized liquid for hydraulic transmission, and is a type of pump. The function of an electric hydraulic pump is to convert the mechanical energy of a power machine (such as an electric motor and an internal combustion engine) into the pressure energy of a liquid. The output flow rate that can be adjusted according to needs is called a variable displacement pump, while the flow rate that cannot be adjusted is called a fixed displacement pump. There are three types of pumps commonly used in electric hydraulic pump systems: gear pumps, vane pumps, and plunger pumps. Gear pump: smaller in size, simpler in structure, less strict in oil cleanliness requirements, and cheaper in price; But the pump shaft is subjected to unbalanced force, severe wear, and significant leakage. Vane pump: divided into double acting vane pump and single acting vane pump. This type of pump has uniform flow rate, smooth operation, low noise, higher working pressure and volumetric efficiency than gear pumps, and a more complex structure than gear pumps
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