Frequently asked questions:
What is an internal gear pump?
An internal gear pump is a positive-displacement hydraulic pump that uses an inner drive gear and a larger outer gear to move hydraulic fluid through a system at a constant rate. It converts mechanical energy into hydraulic energy, drawing oil into the pump and discharging it under pressure to power hydraulic actuators, cylinders, and machinery. Because the design produces very little pulsation, internal gear pumps are widely valued for their smooth, quiet, and efficient operation in demanding industrial environments.
How does an internal gear pump work?
An internal gear pump uses an inner drive gear and a larger outer gear. As they rotate, teeth separate on the inlet side to draw in hydraulic oil, carry it around the gear housing, and force it out under pressure on the discharge side, producing smooth, continuous flow.
What are the advantages of an internal gear pump?
The key advantages of internal gear pumps include low operating noise, minimal flow pulsation, high volumetric efficiency, a broad viscosity and speed range, compact high-power density, and long service life with reduced maintenance needs.
What industries use internal gear pumps?
Internal gear pumps are used in plastics manufacturing, metal forming, foundries, machine tool manufacturing, industrial automation, general manufacturing, and chemical processing, wherever reliable, high-pressure hydraulic power is required.
How do I choose the right internal gear pump?
To choose the right internal gear pump, consider your required operating pressure, flow rate, fluid viscosity, speed range, duty cycle, environmental conditions, and noise requirements, then consult a hydraulics specialist to confirm the correct pump size and seal configuration.
What is the difference between an internal and external gear pump?
Internal gear pumps nest one gear inside a larger internal gear for smoother, quieter flow, while external gear pumps use two identical externally meshed gears, which is simpler but typically noisier with more pulsation.
