1. What is Hydraulic Pump Displacement?

Hydraulic pump displacement refers to the volume of fluid that a hydraulic pump can deliver per revolution. It is typically measured in cubic centimeters per revolution (cm³/rev) and is a critical parameter in hydraulic system design and analysis.

2. How Does the Calculator Work?

The calculator uses the hydraulic pump displacement formula:

Where:

• \( V \) — Pump displacement (cm³/rev)
• \( Q \) — Flow rate (L/min)
• \( N \) — Pump speed (rpm)

Explanation: The formula calculates how much fluid volume the pump moves with each revolution, converting from liters to cubic centimeters.

3. Importance of Pump Displacement Calculation

Details: Accurate pump displacement calculation is essential for proper hydraulic system design, ensuring adequate flow rates, and matching pump performance to system requirements.

4. Using the Calculator

Tips: Enter flow rate in liters per minute (L/min) and pump speed in revolutions per minute (rpm). All values must be valid (greater than 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between theoretical and actual displacement?
A: Theoretical displacement is calculated based on pump geometry, while actual displacement accounts for efficiency losses due to leakage and other factors.

Q2: How does displacement relate to pump size?
A: Larger displacement values generally indicate larger physical pump sizes capable of moving more fluid per revolution.

Q3: Can this formula be used for all types of hydraulic pumps?
A: This formula applies to positive displacement pumps (gear, piston, vane pumps) but may need adjustment for variable displacement pumps.

Q4: Why multiply by 1000 in the formula?
A: The multiplication by 1000 converts liters to cubic centimeters (1 liter = 1000 cm³).

Q5: How does temperature affect pump displacement?
A: Temperature affects fluid viscosity and pump clearances, which can slightly alter actual displacement from theoretical values.