Hydraulic Pump Calculation Formula

Hydraulic Pump Flow Equation:

\[ Q_{pump} = \frac{Disp \times RPM}{1000} \]

Pump Flow (Q_pump):

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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. This is essential for designing and troubleshooting hydraulic systems.

2. How Does the Calculator Work?

The calculator uses the hydraulic pump flow equation:

\[ Q_{pump} = \frac{Disp \times RPM}{1000} \]

Where:

\( Q_{pump} \) — Pump flow rate (L/min)
\( Disp \) — Pump displacement per revolution (cc/rev)
\( RPM \) — Pump rotational speed (revolutions per minute)

Explanation: The equation calculates the theoretical flow output of a hydraulic pump, which is important for system design and performance evaluation.

3. Importance of Pump Flow Calculation

Details: Accurate pump flow calculation is crucial for proper hydraulic system design, ensuring adequate flow for actuators, and preventing system inefficiencies or failures.

4. Using the Calculator

Tips: Enter pump displacement in cc/rev and rotational speed in RPM. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is pump displacement?
A: Pump displacement is the volume of fluid that the pump can deliver per revolution, typically measured in cubic centimeters per revolution (cc/rev).

Q2: Is this the actual or theoretical flow rate?
A: This calculates the theoretical flow rate. Actual flow may be slightly less due to factors like pump efficiency, internal leakage, and fluid viscosity.

Q3: How does temperature affect pump flow?
A: Temperature affects fluid viscosity, which can influence pump efficiency and thus the actual flow output, especially in extreme temperatures.

Q4: Can I use this for all types of hydraulic pumps?
A: This formula works for fixed displacement pumps. Variable displacement pumps require additional calculations based on their control mechanism.

Q5: Why divide by 1000 in the formula?
A: The division by 1000 converts the result from cc/min to L/min (since 1000 cc = 1 liter), providing a more practical unit for hydraulic system measurements.