1. What is Hydraulic Motor Displacement?

Hydraulic motor displacement refers to the volume of fluid required to turn the motor's output shaft through one complete revolution. It's a key parameter in hydraulic system design and determines the motor's torque output and speed characteristics.

2. How Does the Calculator Work?

The calculator uses the hydraulic motor displacement formula:

Where:

• \( Torque \) — Output torque of the motor (lb-ft)
• \( Pressure \) — Working pressure (PSI)
• \( 2\pi \) — Conversion factor for torque to work

Explanation: The formula calculates the theoretical displacement needed to produce a given torque at a specified pressure.

3. Importance of Displacement Calculation

Details: Knowing the displacement is crucial for selecting the right motor for an application, predicting performance characteristics, and ensuring proper system operation.

4. Using the Calculator

Tips: Enter torque in lb-ft and pressure in PSI. Both values must be positive numbers. The result will be in cubic inches per revolution (in³/rev).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between theoretical and actual displacement?
A: Theoretical displacement is calculated from geometry, while actual displacement accounts for internal leakage and efficiency losses.

Q2: How does displacement relate to motor speed?
A: Motor speed (RPM) = (Flow rate × 231) / Displacement (in³/rev)

Q3: What are typical displacement values for hydraulic motors?
A: Displacement can range from less than 1 in³/rev for small motors to over 100 in³/rev for large industrial motors.

Q4: How does pressure affect motor performance?
A: Higher pressure increases potential torque output but may require stronger motor construction and affects efficiency.

Q5: Can this formula be used for hydraulic pumps?
A: The same displacement concept applies to pumps, but the calculation would be rearranged to find torque or pressure.