HENGTE Parker T6 Vane Pump Brand

PARKER double acting vane pump: Its working principle is similar to that of a single acting vane pump, except that the stator surface is composed of eight parts: two long radius arcs, two short radius arcs, and four transition curves, and the stator and rotor are concentric.  When the rotor rotates in a clockwise direction as shown in the diagram, the volume of the sealing working chamber gradually increases at the upper left and lower right corners, forming an oil suction area, and gradually decreases at the lower left and upper right corners, forming an oil pressure area; 

There is a sealed oil zone between the oil suction area and the oil pressure area to separate them.  The rotor of this pump rotates once, and each sealing working chamber completes two oil suction and pressure actions, so it is called a double acting vane pump.  The two suction and pressure zones of the pump are radially symmetrical, and the hydraulic pressure acting on the rotor is radially balanced, so it is also known as a balanced vane pump.

PARKER single acting vane pump: The pump consists of components such as rotor 1, stator 2, blades 3, oil distribution plate, and end cover.  The inner surface of the stator is a cylindrical hole.  There is eccentricity between the rotor and stator.  The blades can slide flexibly in the slots of the rotor.  Under the centrifugal force during rotor rotation and the pressure oil flowing into the blade root, the top of the blades is tightly attached to the inner surface of the stator, forming sealed working cavities between two adjacent blades, oil distribution plates, stator, and rotor. 

When the rotor rotates in a counterclockwise direction, the blade on the right side of the figure extends outward, and the volume of the sealing working chamber gradually increases, creating a vacuum.  Therefore, oil is sucked in through the suction port 6 and the window on the oil distribution plate 5.  And on the left side of the graph.  The blades retract inward, and the volume of the sealing chamber gradually decreases.  The oil in the sealing chamber is pressed out through another window of the oil distribution plate and the oil pressure port 1 and output to the system. 

This type of pump absorbs and presses oil once during each rotation of the rotor, hence it is called a single acting pump.  The rotor is subjected to radial hydraulic imbalance force, so it is also known as a non balanced pump, and its bearing load is relatively large.  By changing the eccentricity between the stator and rotor, the displacement of the pump can be changed, so these pumps are variable displacement pumps.

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