VICKERS axial piston pump

VICKERS axial piston pump

VICKERS plunger pump is a type of reciprocating pump, belonging to the volumetric pump. Its plunger is driven by the eccentric rotation of the pump shaft, reciprocating motion, and its suction and discharge valves are both one-way valves. When the plunger is pulled out, the pressure inside the working chamber decreases and the outlet valve closes. When the pressure is lower than the inlet pressure, the inlet valve opens and liquid enters; When the plunger is pushed inward, the working chamber pressure increases, the inlet valve closes, and when it is higher than the outlet pressure, the outlet valve opens and the liquid is discharged. The axial piston pump with sliding shoe structure is an axial piston pump used. The plunger placed in the cylinder is in contact with the inclined plate through the sliding shoe. When the transmission shaft drives the cylinder to rotate, the inclined plate pulls out or pushes back the plunger from the cylinder, completing the oil suction and discharge process. The oil in the working chamber composed of the plunger and cylinder bore is connected to the suction and discharge chambers of the pump through the oil distribution plate. The variable mechanism is used to change the inclination angle of the inclined plate, and the displacement of the pump can be changed by adjusting the inclination angle of the inclined plate.

What is an axial piston pump: An axial piston pump is a piston pump in which the reciprocating motion direction of the piston or plunger is parallel to the central axis of the cylinder body. Axial piston pump operates by utilizing the volume change generated by the reciprocating motion of a plunger parallel to the transmission shaft in the plunger hole. Due to the fact that the plunger and plunger hole are both circular parts, high precision fitting can be achieved during processing, resulting in high volumetric efficiency, smooth operation, good flow uniformity, low noise, and high working pressure. However, they are sensitive to hydraulic oil pollution, have complex structures, and are expensive.

2、 Composition of axial piston pump: 1. Handwheel; 2. Screw rod; 3. Variable piston; 4. Inclined plate; 5. Sales; 6. Return trip; 7. Sliding shoes; 8. Plunger; 9. Intermediate pump body; 10. Front pump body: 11. Front bearing; 12. Distribution plate; 13. Axis; 14. Centering spring; 15. Cylinder body; 16. Large bearings; 17. Steel ball.

3、 Classification of axial piston pumps: 1. Quantitative piston pumps; 2. Manual variable displacement piston pump; 3. Pressure variable piston pump; 4. Rated variable displacement piston pump; 5. Electro hydraulic control plunger pump; 6. Constant pressure variable displacement piston pump.

4、 Pressure problem of axial piston pump: There is a distribution plate and a plunger inside the axial piston pump. During high-speed operation, the clearance between the plunger and the cylinder body is required to be high, resulting in flow and pressure. If the clearance is enlarged after a long period of running in, it will cause internal leakage and fail to produce the flow and pressure required by the design. It also depends on the degree of wear, and the pressure will vary; In addition, when the distribution plate rotates at high speed, it will wear out directly with the passage of time and the entry of impurities. At this time, no pressure can be generated, and the generated flow will be directly discharged back to the oil tank through the gap and return port.

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VICKERS axial piston pump