The working principle of common hydraulic pumps
Date:
2023-11-03
It also relies on changes in volume to end oil absorption and oil pressure.However, in order to ensure the separation of the suction and oil pressure ports, a crescent separator should be added to the base of the involute gear pump. In the cycloid gear pump, because the two gears are only one tooth apart, the suction and oil pressure can always be guaranteed when engaging. No communication, no crescent separator is required.
It also relies on changes in volume to end oil absorption and oil pressure.However, in order to ensure the separation of the suction and oil pressure ports, a crescent separator should be added to the base of the involute gear pump. In the cycloid gear pump, because the two gears are only one tooth apart, the suction and oil pressure can always be guaranteed when engaging. No communication, no crescent separator is required.
Plunger pump
The hydraulic pump is divided into radial piston pump and axial piston pump according to whether the plunger is perpendicular or parallel to the drive shaft. It uses the reciprocating movement of the plunger in the plunger hole to change the volume and end the oil absorption and oil pressure.
(1) The radial piston pump is composed of components such as stator, rotor, bushing, oil distribution shaft and plunger.There is a deflection distance e between the rotor and the stator base.The oil distribution shaft is fixed, and an oil distribution window is opened along the circumference. The first half of the oil distribution window corresponds to the oil suction port, and the second half corresponds to the oil pressure port.When the rotor rotates clockwise, due to the presence of E.The plunger in the first half of the week is thrown out along the plunger hole under the action of centrifugal force.The volume at the bottom of the plunger is constantly increasing.Forming a vacuum, the oil is sucked into the oil chamber through the oil suction port on the oil distribution shaft.When the plunger continues to rotate to the second half of the circumference.The volume at the bottom of the plunger is constantly decreasing, and at this moment the oil is tightened and the pressure begins to rise.It is fed into the system through the oil pressure port.Every time the rotor rotates for a week, the process of oil absorption and oil pressure ends.By adjusting the e value, the displacement or flow rate of the pump can be changed, so it is also called a variable pump.
(2) The axial hydraulic pump is characterized by the plunger hole parallel to the axis.It is composed of swash plate, plunger, cylinder block, oil distribution plate, drive shaft, return plate, return spring and other components.There is an angle between the axis of the swash plate and the drive shaft, and the plunger is close to the oil distribution plate under the action of the return plate, the return spring, and the oil pressure.
Vane pump
Hydraulic pumps are divided into single-acting vane pumps and double-acting vane pumps according to the number of suction and oil pressure per revolution.Single-acting vane pumps, also known as variable vane pumps or unbalanced vane pumps, suck and pressure oil once a week for each revolution of the pump shaft.The two-vane pump is called a quantitative vane pump or a balanced vane pump, and the pump shaft sucks and presses oil twice a week.
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