1. What is Hydraulic Gear Pump Displacement?

Displacement refers to the volume of fluid a hydraulic gear pump can deliver per revolution. It's a critical parameter for determining pump performance and system requirements in hydraulic applications.

2. How Does the Calculator Work?

The calculator uses the displacement formula:

Where:

• \( Q \) — Flow rate in gallons per minute (GPM)
• \( RPM \) — Pump speed in revolutions per minute
• \( 231 \) — Conversion factor (cubic inches per gallon)

Explanation: The formula calculates the volume displaced per revolution by converting the flow rate from GPM to cubic inches per minute, then dividing by RPM.

3. Importance of Displacement Calculation

Details: Knowing the displacement is essential for proper pump selection, system design, and ensuring the pump meets the hydraulic system's flow and pressure requirements.

4. Using the Calculator

Tips: Enter the flow rate in GPM and the pump speed in RPM. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is 231 used in the formula?
A: 231 is the conversion factor between gallons and cubic inches (1 gallon = 231 cubic inches).

Q2: What are typical displacement values for gear pumps?
A: Common displacements range from 0.1 to 10 in³/rev, depending on pump size and application.

Q3: How does displacement affect pump performance?
A: Higher displacement pumps move more fluid per revolution but require more torque to drive at the same pressure.

Q4: Can this formula be used for other pump types?
A: While the basic principle applies, specific pump designs may require different calculations or efficiency factors.

Q5: How does temperature affect displacement calculations?
A: The formula assumes constant fluid density. For precise calculations at extreme temperatures, fluid properties should be considered.