1. What is the Hydraulic Pump Flow Rate Formula?

The hydraulic pump flow rate formula calculates the volumetric flow rate of a hydraulic pump based on its displacement and rotational speed. It's essential for designing and troubleshooting hydraulic systems.

2. How Does the Calculator Work?

The calculator uses the hydraulic pump flow rate formula:

Where:

• \( Q \) — Flow rate (gallons per minute, GPM)
• \( Displacement \) — Pump displacement (cubic inches per revolution, in³/rev)
• \( RPM \) — Pump speed (revolutions per minute)
• \( 231 \) — Conversion factor (cubic inches per gallon)

Explanation: The formula converts the pump's mechanical displacement into volumetric flow rate, accounting for unit conversions.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is crucial for proper hydraulic system design, component selection, and performance evaluation. It affects system pressure, speed, and efficiency.

4. Using the Calculator

Tips: Enter pump displacement in in³/rev and RPM. Both values must be positive numbers. The result will be in gallons per minute (GPM).

5. Frequently Asked Questions (FAQ)

Q1: Why is 231 the conversion factor?
A: There are 231 cubic inches in a US gallon, which converts the displacement volume to gallons per minute.

Q2: What are typical displacement values?
A: Common hydraulic pumps range from 0.1 in³/rev for small applications to 10+ in³/rev for industrial systems.

Q3: Does this account for pump efficiency?
A: No, this is theoretical flow. Actual flow will be less due to volumetric efficiency (typically 85-95% for good pumps).

Q4: Can I use this for hydraulic motors?
A: Yes, the same formula applies to hydraulic motors, calculating theoretical flow required to achieve a certain RPM.

Q5: How does temperature affect the calculation?
A: Temperature affects fluid viscosity but not this theoretical calculation. However, it may affect actual flow due to efficiency changes.