What should be noted when connecting three cylinders of a single-acting reciprocating pump?

Thread Content

To be precise, the phase difference between the plungers or pistons of the three cylinders should be 120 degrees: when the phase of the plunger or piston in the first cylinder is at 0 degrees, that of the plunger or piston in the second cylinder is at 120 degrees, and that of the plunger or piston in the third cylinder is at 240 degrees. Similar to the phase difference in three-phase AC power. Such a connection is primarily intended to effectively reduce the flow pulsation and pressure pulsation of three-cylinder single-acting reciprocating pumps. Because the flow rate pulsation rate of single-cylinder, single-acting reciprocating pumps is very high, with the peak flow rate reaching 2.14 times the average flow rate (without considering the effect of the rod ratio), high flow rates can easily cause vibration in the pipelines. By using a three-cylinder single-acting reciprocating pump with a phase difference of 120 degrees, the peak flow rate is only about 10% of the average flow rate.