1. What is Hydraulic Motor Torque?

Hydraulic motor torque is the rotational force produced by a hydraulic motor, determined by the motor's displacement and the system pressure. It's a crucial parameter for selecting and sizing hydraulic motors for various applications.

2. How Does the Calculator Work?

The calculator uses the hydraulic motor torque equation:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( D \) — Displacement in cubic centimeters per revolution (cm³/rev)
• \( P \) — Pressure in bar
• \( \pi \) — Mathematical constant (~3.14159)

Explanation: The equation shows that torque is directly proportional to both displacement and pressure, with the constant 2π converting the units appropriately.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load without stalling or overheating.

4. Using the Calculator

Tips: Enter the motor's displacement in cm³/rev and system pressure in bar. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between theoretical and actual torque?
A: Theoretical torque is calculated as shown, while actual torque accounts for mechanical efficiency (typically 85-95% of theoretical).

Q2: How does speed affect torque in hydraulic motors?
A: In ideal conditions, torque is independent of speed, but in practice, torque may decrease at very high speeds due to increased friction.

Q3: What are typical torque values for hydraulic motors?
A: Torque varies widely from <1 Nm for small motors to >10,000 Nm for large industrial motors, depending on displacement and pressure.

Q4: Can I use this for hydraulic pumps?
A: Yes, the same equation applies for calculating the torque required to drive a hydraulic pump.

Q5: How do I account for efficiency losses?
A: Multiply the calculated torque by the motor's mechanical efficiency (typically 0.85 to 0.95) for more realistic values.