1. What is Hydraulic Pump Shaft Torque?

Hydraulic pump shaft torque represents the rotational force required to drive a hydraulic pump against a specific pressure. It's a critical parameter in hydraulic system design and pump selection.

2. How Does the Calculator Work?

The calculator uses the hydraulic torque formula:

Where:

• \( T \) — Shaft torque (Nm)
• \( displacement \) — Pump displacement per revolution (m³/rev)
• \( pressure \) — System pressure (Pa)
• \( \pi \) — Mathematical constant pi (approximately 3.1416)

Explanation: This formula calculates the theoretical torque required to drive a hydraulic pump based on its displacement characteristics and the system pressure.

3. Importance of Shaft Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, drive system design, and ensuring the hydraulic system operates within safe mechanical limits.

4. Using the Calculator

Tips: Enter displacement in m³/rev and pressure in Pascals (Pa). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for this calculation?
A: Use m³/rev for displacement and Pascals (Pa) for pressure to get torque in Newton-meters (Nm).

Q2: Is this the actual or theoretical torque?
A: This calculates theoretical torque. Actual torque may be higher due to mechanical efficiency losses and other factors.

Q3: How does efficiency affect the torque calculation?
A: For actual torque requirements, divide the theoretical torque by the pump's mechanical efficiency.

Q4: Can I use different pressure units?
A: Yes, but you must convert to Pascals (1 bar = 100,000 Pa, 1 psi = 6894.76 Pa).

Q5: What if I have a variable displacement pump?
A: Use the maximum displacement for worst-case torque calculations, or calculate for different displacement settings.