Gear Pump Flow Rate Calculator

Gear Pump Flow Rate Equation:

\[ Q_{gear\_pump} = \frac{Disp_{gear} \times RPM_{gear} \times \eta_{gear}}{231} \]

Displacement (Disp_gear):

cubic inches per revolution

RPM (RPM_gear):

revolutions per minute

Efficiency (η_gear):

unitless (0-1)

Flow Rate (Q_gear_pump):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Gear Pump Flow Rate Equation?

The gear pump flow rate equation calculates the volumetric flow rate of a gear pump based on its displacement, rotational speed, and efficiency. This equation is essential for hydraulic system design and performance analysis.

2. How Does the Calculator Work?

The calculator uses the gear pump flow rate equation:

\[ Q_{gear\_pump} = \frac{Disp_{gear} \times RPM_{gear} \times \eta_{gear}}{231} \]

Where:

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

Explanation: The equation calculates the theoretical flow rate of a gear pump, accounting for its mechanical efficiency and conversion between different volume units.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is crucial for hydraulic system design, pump selection, performance evaluation, and ensuring proper system operation in various industrial applications.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is pump displacement?
A: Pump displacement refers to the volume of fluid displaced per revolution of the pump shaft, typically measured in cubic inches per revolution.

Q2: Why is the conversion factor 231 used?
A: 231 is the number of cubic inches in one US gallon, used to convert from cubic inches per minute to gallons per minute.

Q3: What affects gear pump efficiency?
A: Efficiency is affected by factors such as internal leakage, fluid viscosity, operating pressure, and mechanical friction within the pump.

Q4: What are typical efficiency values for gear pumps?
A: Gear pump efficiencies typically range from 0.80 to 0.95 (80-95%), depending on design, operating conditions, and fluid properties.

Q5: Can this equation be used for other pump types?
A: While similar principles apply, specific equations may vary for different pump types (vane pumps, piston pumps, etc.) due to their unique operating characteristics.