Chapter 1. Description of Hybrid Servo Drives I VFD-VJ
1-8
1-3-2 Selection of Pump for Hybrid Servo Motor
Select a pump with a suitable displacement based on the required flow rate and motor speed;
If low noise is required, you can choose the screw pump or internal gear type. If a high
volumetric efficiency is required, you can choose the piston pump or dual displacement
piston pump.
Comparison of Commonly Used Pump (This may vary for different pump manufacturers).
Type of Oil
Pump
Volumetric
Efficiency
Flow Pulsation Rotation Speed Noise
Internal Gear
Pump
Low Medium Medium Low
Piston Pump High Low Low High
Screw Pump Medium High High Medium
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