1. What is a Hydraulic Pump Flow Calculator?

Definition: This calculator estimates the flow rate of a hydraulic pump based on displacement, speed, and volumetric efficiency.

Purpose: It helps hydraulic system designers and maintenance technicians determine pump performance and system requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (m³/s)
• \( D \) — Pump displacement per revolution (m³/rev)
• \( N \) — Pump speed (revolutions per second)
• \( \eta \) — Volumetric efficiency (0-1)

Explanation: The pump's displacement per revolution multiplied by its speed gives theoretical flow, which is then adjusted by efficiency to get actual flow.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate estimation ensures proper system operation, prevents cavitation, and helps select appropriate components.

4. Using the Calculator

Tips: Enter the pump displacement in m³/rev, speed in rev/s, and efficiency (default 0.92). Efficiency must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is volumetric efficiency?
A: It's the ratio of actual flow to theoretical flow, accounting for internal leakage and other losses (typically 85-95% for good pumps).

Q2: How do I convert RPM to rev/s?
A: Divide RPM by 60 (e.g., 1800 RPM = 30 rev/s).

Q3: What's a typical displacement value?
A: Common values range from 1 cm³/rev (0.000001 m³/rev) for small pumps to 250 cm³/rev (0.00025 m³/rev) for larger ones.

Q4: Why is my actual flow lower than calculated?
A: Possible causes include worn pump components, high system pressure, or fluid viscosity issues.

Q5: Can I use this for hydraulic motors?
A: Yes, the same formula applies to hydraulic motors when calculating flow requirements.