1. What is a Hydraulic Pump Torque Calculator?

Definition: This calculator determines the torque required to drive a hydraulic pump based on system pressure and pump displacement.

Purpose: It helps hydraulic system designers and maintenance technicians properly size motors and evaluate pump performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (lb-ft)
• \( P \) — Pressure (psi)
• \( D_p \) — Pump displacement (in³/rev)
• \( 2\pi \) — Conversion factor for rotational units

Explanation: The product of pressure and displacement gives the basic torque requirement, which is then divided by 2π to convert to lb-ft units.

3. Importance of Hydraulic Pump Torque Calculation

Details: Accurate torque calculation ensures proper motor sizing, prevents overload conditions, and helps optimize hydraulic system efficiency.

4. Using the Calculator

Tips: Enter the system pressure in psi and pump displacement in cubic inches per revolution. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units does this calculator use?
A: The calculator uses psi for pressure, in³/rev for displacement, and outputs torque in lb-ft.

Q2: Does this account for pump efficiency?
A: No, this is theoretical torque. For actual requirements, divide the result by the pump's mechanical efficiency (typically 85-95%).

Q3: Can I use this for hydraulic motors?
A: Yes, the same formula applies for hydraulic motors, as they are essentially pumps running in reverse.

Q4: What's a typical displacement value?
A: Common pump displacements range from 0.1 in³/rev for small pumps to 10+ in³/rev for large industrial pumps.

Q5: How does pressure affect torque?
A: Torque is directly proportional to pressure - doubling the pressure doubles the required torque.