1. What is Hydraulic Motor Displacement?

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

2. How Does the Calculator Work?

The calculator uses the hydraulic motor displacement formula:

Where:

• \( torque \) — Torque output (in-lb)
• \( pressure \) — System pressure (psi)
• \( \pi \) — Mathematical constant pi (approximately 3.1416)

Explanation: This formula calculates the theoretical displacement based on the torque output and system pressure, assuming 100% efficiency.

3. Importance of Displacement Calculation

Details: Accurate displacement calculation is crucial for proper hydraulic system design, motor selection, and ensuring the system meets performance requirements for torque and speed.

4. Using the Calculator

Tips: Enter torque in inch-pounds (in-lb) and pressure in pounds per square inch (psi). All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for this calculation?
A: This calculator uses inch-pounds for torque and psi for pressure, resulting in cubic inches per revolution for displacement.

Q2: Does this formula account for efficiency losses?
A: No, this is the theoretical displacement. Actual performance may vary due to mechanical and volumetric efficiency losses.

Q3: Can I use this for hydraulic pumps as well?
A: The same formula applies to hydraulic pumps, as displacement calculation works similarly for both motors and pumps.

Q4: What is a typical displacement range for hydraulic motors?
A: Displacement can range from less than 0.1 cu in/rev for small motors to over 50 cu in/rev for large industrial motors.

Q5: How does displacement affect motor performance?
A: Higher displacement motors produce more torque at lower speeds, while lower displacement motors operate at higher speeds with less torque.