1. What is Hydraulic Motor Torque?

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

2. How Does the Calculator Work?

The calculator uses the fundamental hydraulic torque equation:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( D \) — Motor displacement in cubic centimeters per revolution (cm³/rev)
• \( P \) — Pressure difference across the motor in bar
• \( \pi \) — Mathematical constant (approximately 3.1416)

Explanation: The equation shows that torque is directly proportional to both displacement and pressure. The 2π factor converts the units to standard torque measurement (Nm).

3. Importance of Torque Calculation

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

4. Using the Calculator

Tips: Enter the motor displacement (available in motor specifications) and system pressure (difference between inlet and outlet pressure). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How does speed affect torque?
A: In an ideal hydraulic motor, torque is independent of speed. However, in practice, efficiency decreases at higher speeds, affecting actual torque output.

Q2: What's the relationship between torque and power?
A: Power (kW) = Torque (Nm) × Speed (rpm) / 9549. Higher torque at the same speed means more power.

Q3: What are typical torque values for hydraulic motors?
A: Torque varies widely by motor size - from <1 Nm for small motors to >10,000 Nm for large radial piston motors.

Q4: How does efficiency affect actual torque?
A: Actual torque = Theoretical torque × mechanical efficiency. Most motors have 85-95% mechanical efficiency.

Q5: Can I use this for hydraulic pumps?
A: Yes, the same equation calculates input torque required to drive a hydraulic pump at given pressure.