Hydraulic piston pumps push fluids through the reciprocating motion of pistons. Inside the pump, there are usually nine pistons that rotate around a central drive shaft. As these pistons rotate, they move in the direction of a swash plate or shaft, which forces them to reciprocate up and down along the pump shaft. As the pistons retract, the fluid under the reservoir head fills the increasing volume. When the pistons reach top dead center, the suction port closes and the pressure port opens, allowing the extended cylinder to push the fluid out.
For variable displacement pumps, the angle of the swash plate or shaft can be adjusted. As the angle decreases, the piston stroke also decreases, resulting in a decrease in output flow. Another significant advantage of axial piston pumps is that there are no contact parts between the pistons.
Different design types
Axial piston pumps are available in a variety of designs, with swash plate and swash plate designs each suited to different applications. For example, swash plate designs are more suitable for motor applications, while swash plate designs are more suitable for pumps. Different machines require unique characteristics and performance, so there are many different types of pumps on the market.
Operation and Maintenance
Pay attention to the surface finish and pressure parameters of the inclined plate and ensure timely maintenance, which will help maintain the long-term stable operation of the pump. Operators need to pay attention to the surface finish of the inclined plate, because slight grooves or damage may affect the performance of the pump. At the same time, the suction and casing pressures are also critical to the stable operation of the pump.
During operation and maintenance, pay attention to the wear of the sliding shoe surface. Suction and casing pressures are critical to the stable operation of the pump. Too low suction pressure or too high casing pressure may cause the liquid film to rupture, which in turn causes metal contact and early failure of the pump. In addition, for pumps with inclined axis design, their spherical design allows them to operate at higher speeds. However, even such a design requires proper maintenance and operation to ensure its long-term performance.
Before starting the plunger pump, be sure to confirm that the suction line and pump casing are fully filled with oil to avoid damage to the pump body due to incorrect operation. At the same time, carefully review the manufacturer's data sheet to confirm that your application scenario meets all recommended operating limits. The key features of plunger pumps include the plunger design and eccentric operation ability, which enable them to rotate the drive shaft in both directions to provide flow.
