Oil Research A56 Hydraulic Pump Distribution Shaft Radial Piston Pump

2025-01-13

The structure and operating principle of a radial piston pump with a hydraulic cylinder distribution shaft. The accessories of the oil research A56 hydraulic pump are evenly distributed radially with several plunger holes on rotor 3, which are equipped with plungers l. By the effect of centrifugal force (some structures rely on tension springs or low-pressure oil replenishment), the head of plunger 1 is pressed against the inner wall of stator 2; There is a displacement distance e between the center of rotor 3 and the center of stator 2.

On the fixed distribution shaft 5, there are two separate oil distribution chambers I and II located opposite the plunger hole. The oil distribution chamber of the hydraulic cylinder is connected to the pump's suction and discharge ports through two axial holes located at different locations. When the transmission shaft drives rotor 3 to roll, due to the slight distance e between stator 2 and rotor 3, plunger 1 moves back and forth in the plunger hole of the Oil Research A3H series plunger oil pump when it rolls with rotor 3.

When rotor 3 rolls clockwise, plunger 1 extends outward when passing through half of circle E, and the volume of the plunger chamber gradually increases. It absorbs oil from the axial hole through the oil port on the distribution liner 4; When the plunger rotates to the lower half, the inner wall of the stator pushes the plunger inward, and the working volume at the bottom of the plunger gradually decreases, and oil is discharged outward through the distribution shaft 5.

The hydraulic cylinder moves the stator and changes the displacement of the pump by adjusting the displacement distance e. When the stator of the oil lift plunger pump is moved to change the amount of migraine from positive to negative, the suction and discharge ports of the pump are interchanged, so the radial plunger pump can be a one-way or two-way variable pump. In order to minimize flow pulsation, an odd number of plungers is generally used.

In order to increase flow, radial piston pumps sometimes widen the cylinder body along the axis direction and make the pistons in multiple rows. For a multi row radial piston pump with a displacement of i, the displacement and flow rate are respectively i times that of a single row radial piston pump.