1. What is the Hydraulic Pump Flow Equation?

The hydraulic pump flow equation calculates the theoretical flow rate of a hydraulic pump based on its displacement and rotational speed. It provides an estimate of the pump's output under ideal conditions.

2. How Does the Calculator Work?

The calculator uses the hydraulic pump flow equation:

Where:

• \( Q \) — Flow rate (liters per minute)
• \( Disp \) — Pump displacement (cubic centimeters per revolution)
• \( RPM \) — Rotational speed (revolutions per minute)

Explanation: The equation calculates the theoretical flow output by multiplying the pump's displacement per revolution by its rotational speed, then converting to liters per minute.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is essential for hydraulic system design, pump selection, and ensuring proper system performance and efficiency.

4. Using the Calculator

Tips: Enter pump displacement in cm³/rev and rotational speed in RPM. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect actual pump flow rate?
A: Actual flow may differ due to efficiency losses, pressure variations, temperature effects, and internal leakage.

Q2: How does displacement affect pump performance?
A: Larger displacement pumps deliver more flow at the same RPM, but require more input power.

Q3: What are typical displacement values for hydraulic pumps?
A: Displacement values range from 1-500 cm³/rev depending on pump type and application.

Q4: How accurate is this theoretical calculation?
A: This provides theoretical flow. Actual flow is typically 85-95% of theoretical due to volumetric efficiency.

Q5: Can this formula be used for all pump types?
A: This formula applies to positive displacement pumps (gear, vane, piston) but not centrifugal pumps.