1. What is Gear Pump Flow?

Gear pump flow refers to the volumetric flow rate of fluid delivered by a gear pump, typically measured in gallons per minute. It depends on the pump's displacement, rotational speed, and efficiency.

2. How Does the Calculator Work?

The calculator uses the gear pump flow equation:

Where:

• \( Q_{gp\_flow} \) — Flow rate (gallons per minute)
• \( Disp_{gp} \) — Displacement (cubic inches per revolution)
• \( RPM_{gp} \) — Rotational speed (revolutions per minute)
• \( \eta_{gp} \) — Pump efficiency (unitless, 0 to 1)
• 231 — Conversion factor (cubic inches to gallons)

Explanation: The equation calculates the actual flow rate by accounting for the pump's theoretical displacement, operating speed, and efficiency losses.

3. Importance of Flow Rate Calculation

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

4. Using the Calculator

Tips: Enter displacement in cubic inches per revolution, RPM in revolutions per minute, and efficiency as a decimal between 0 and 1. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is pump displacement?
A: Displacement is the volume of fluid pumped per revolution, determined by the pump's geometric design and size.

Q2: Why is efficiency important?
A: Efficiency accounts for volumetric losses due to internal leakage, friction, and other factors that reduce actual flow below theoretical flow.

Q3: What is the 231 conversion factor?
A: 231 cubic inches equals 1 US gallon, converting the displacement volume from cubic inches to gallons.

Q4: How does RPM affect flow rate?
A: Flow rate is directly proportional to RPM - doubling the RPM doubles the flow rate (assuming constant efficiency).

Q5: What are typical efficiency values?
A: Gear pump efficiencies typically range from 0.80 to 0.95 (80-95%), depending on design, operating conditions, and fluid properties.