1. What is Hydraulic Motor Torque?

Hydraulic motor torque is the rotational force produced by a hydraulic motor, determined by the displacement of the motor and the pressure of the hydraulic fluid. It's a critical parameter for selecting the right motor for an application.

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 (approximately 3.1416)

Explanation: The equation shows that torque is directly proportional to both displacement and pressure, with the result divided by 2π to convert to Newton-meters.

3. Importance of Torque Calculation

Details: Proper torque calculation ensures the hydraulic motor can handle the required load without stalling or being oversized for the application, optimizing both performance and cost.

4. Using the Calculator

Tips: Enter the motor displacement in cm³/rev and system pressure in bar. Both values must be positive numbers. The calculator will compute the theoretical torque output.

5. Frequently Asked Questions (FAQ)

Q1: What affects hydraulic motor torque output?
A: Torque is primarily determined by displacement and pressure, but can also be affected by mechanical efficiency, temperature, and fluid viscosity.

Q2: How does speed relate to torque in hydraulic motors?
A: Generally, as speed increases, torque decreases for a given flow rate and pressure, following the power equation (Power = Torque × Angular Velocity).

Q3: What's the difference between theoretical and actual torque?
A: Theoretical torque is calculated from pressure and displacement, while actual torque is lower due to mechanical losses (typically 85-95% of theoretical).

Q4: How do I account for efficiency in torque calculations?
A: Multiply the theoretical torque by the motor's mechanical efficiency (usually provided by the manufacturer) to get actual torque.

Q5: Can this calculator be used for hydraulic pumps?
A: While the principle is similar, pump torque calculations may require additional factors and this calculator is specifically designed for motors.