Hydraulic pump is a common power transmission device, which is mainly used to convert mechanical energy into hydraulic energy. Hydraulic pumps are divided into axial piston pumps and radial piston pumps. The working principle of axial piston pump is that the plunger moves along the axial direction, and oil is absorbed and discharged by changing the volume in the pump cavity. Radial piston pump uses the movement of plunger in radial direction to accomplish similar functions.
Hydraulic pump is widely used in industry, automobile, aviation and other fields, and its working principle and performance directly affect the operation effect of the whole hydraulic system. Therefore, understanding the working principle of hydraulic pump is of great significance to the design, use and maintenance of hydraulic system.
Features of hydraulic pump:
1, there are several sealed spaces that can change periodically. The theoretical flow of hydraulic pump has nothing to do with the working pressure, but only depends on the change of the volume of sealed cavity in unit time, so it is usually called displacement, which refers to the amount of oil discharged by the pump shaft every turn, and is expressed by V.
2. It has corresponding traffic distribution mechanism. Separate the oil suction cavity from the oil discharge cavity to ensure that the hydraulic pump regularly and continuously sucks and discharges oil.
3. The pressure of the liquid in the oil tank must be equal to or greater than atmospheric pressure, which is the external condition that the hydraulic pump can absorb oil. So the general fuel tank is sealed.
4. It has one or more oil outlets to convert hydraulic energy into mechanical energy and drive the actuator in the hydraulic system to move.
5. Variable pump whose output flow can be adjusted as required and fixed pump whose flow cannot be adjusted.
Refer to the above content: Baidu Encyclopedia-Hydraulic Pump