Calculating the flow rate or liters per minute (Lpm) of a hydraulic pump is a crucial task for any engineer working with hydraulic systems. Here are the steps to calculate the Lpm of a hydraulic pump:
- Identify the displacement of the hydraulic pump in cubic centimeters (cc) or liters per revolution (L/rev). This information is usually found in the manufacturer’s specifications or the pump datasheet.
- Determine the speed of the hydraulic pump in revolutions per minute (RPM). This can be measured using a tachometer or obtained from the pump datasheet.
- Use the following formula to calculate the flow rate or Lpm:
Lpm = (Displacement x RPM) ÷ 1000
For example, let’s say we have a hydraulic pump with a displacement of 50 cc/rev and is operating at a speed of 2000 RPM. Using the formula above, we can calculate the Lpm of the pump as follows:
Lpm = (50 cc/rev x 2000 RPM) ÷ 1000
Lpm = 100 Lpm
Therefore, the flow rate or Lpm of the hydraulic pump is 100 Lpm. It is important to note that this calculation only provides an estimate of the volumetric flow rate and does not take into account any losses or inefficiencies in the hydraulic system.