Three-Cylinder Plunger Pump: Structural Features and Operating Instructions

Three-cylinder plunger pump It is a type of hydraulic pump that achieves variations in oil volume and pressure through the reciprocating motion of a piston within a cylinder. Its advantages include high pressure, compact structure, high efficiency, and convenient flow regulation. This system is primarily used in applications requiring high pressure and large flow rates, as well as in situations where power and flow need to be adjusted, such as gantry planers, broaching machines, hydraulic presses, construction machinery, mining equipment, metallurgical machinery, and marine vessels.
   A swashplate-type axial piston pump is arranged around the circumference of a conventional cylinder. The centerlines of the pistons and the cylinder block are aligned, and the swashplate is inclined at a certain angle relative to the cylinder axis. Oil is drawn in through inlet ports on the left and right sides of the oil pan, and the pressurized oil is delivered to the hydraulic cylinder; with each rotation, the suction pressure of each piston pump delivers oil. 1 times. If the inclination angle of the swashplate remains constant, it functions as a fixed-displacement pump. If the inclination angle is adjustable, it is a variable-displacement pump.
   Three-cylinder plunger pump The motor has There are three primary friction pairs: the slider and swashplate, the port plate and cylinder block, and the piston and cylinder bore surface. These pairs must ensure a tight seal while minimizing wear.
   The slipper contacts the swashplate in a floating, non-contact electrostatic discharge configuration, thereby resulting in contact between the slipper and the swashplate. A high-pressure oil film is formed within the plunger chamber, with a thickness of 10 to 30 mm, relying on fluid pressure to bear the load and thereby preventing direct metal-to-metal wear. The friction pair between the valve plate and the cylinder operates under a statically distributed dynamic load. The friction pair between the plunger and the cylinder bore is of a non-static pressure-relief type, with the plunger rod executing linear reciprocating motion within the cylinder bore.
   Diameter of the axial damping hole in a three-cylinder plunger pump At the center of d, a portion of the pressurized oil generated by the plunger is directed into the oil chamber at the shoe end, increasing the oil film thickness in the vicinity of H and thereby generating a vertical force—traction force F—acting on the slider surface. The magnitude of F depends on the dimensions of the shoes R1 and R2, and this force acts in the direction opposite to the pressing force F exerted by the plunger on the inclined plate of the slider, rather than in the same direction as the pressing force.

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