high pressure plunger pump

High pressure plunger pump features

The instantaneous flow is pulsating

This is because in a plunger pump, the suction and discharge of liquid media are carried out alternately, and the piston's velocity is constantly changing during the displacement.In a pump with only one working chamber, the instantaneous flow rate of the pump not only changes with time, but also is discontinuous.With the increase of working chamber, the fluctuation range of instantaneous flow is smaller and smaller.

The average flow is constant

In theory, the flow of the pump depends only on the main structural parameters of pump n number per minute (reciprocating), S (piston stroke), D (piston diameter), Z (piston), has nothing to do with the discharge pressure, and the medium temperature, viscosity and other physical and chemical properties.So the flow of the pump is constant.

The pressure of the pump depends on the characteristics of the pipe

The discharge pressure of plunger pump cannot be limited by the pump itself, but depends on the pipeline characteristics of the pump device and has nothing to do with the flow rate.That is to say, if think conveying fluid is incompressible, so, in theory, can think of reciprocating pump discharge pressure will not be subject to any restrictions, can according to the properties of pipeline pump, set up of any required pump discharge pressure., of course, all of the reciprocating pump has a pump discharge pressure regulation, this is not to say that the pump discharge pressure will not rise again, and just said, because the engine rated power and the limitation of the structure strength of the pump, are not allowed in the discharge pressure is beyond use.

4. Strong adaptability to conveying media

Plunger pump can transport any medium in principle, almost free from the physical and chemical properties of the medium.Of course, due to the limitation of materials and manufacturing process and sealing technology of the hydraulic end, it is sometimes difficult to adapt to the situation.

5. Good self-absorption performance

Plunger pump not only has good absorption capacity, but also has good self-absorption performance.Therefore, for most reciprocating pumps, there is usually no need to pump before starting.The machine is efficient and energy-saving.

6. Flow rate of high pressure plunger pump

Theoretical flow rate of pump: Qt=AsnZ

Where, theoretical flow rate of Qt pump;The cross-sectional area of A plunger (or piston);S trip;N crankshaft speed (or piston reciprocating times per minute) z-link number (plunger or piston number)

Actual pump flow: Q= qt-q.

Where, the flow rate of Q pump;Theoretical flow rate of Qt pump;Q pump flow loss.The flow loss of the pump is caused by the following factors: volume loss caused by liquid compression or expansion;Loss of volume due to hysteresis of the valve during closing;Volume loss caused by leakage through the sealing cover due to loose valve after closing;Volume loss due to leakage through a plunger, piston rod, or piston ring.