The hydraulic systems where fluids are transferred and metered widely use external gear pumps and internal gear pumps as the two main types of gear pumps. However they both have their own advantages depending on specific application requirements, but when comparing the advantages of an external gear pump over an internal one, several key points stand out:
- Higher Pressure Capabilities: External gear pumps can normally operate at higher pressure levels than internal ones. This is because of their design nature which allows for better load distribution on the gears and the bearings. Often external gear pumps are able to handle continuous pressure up to 3000 psi or more, making them appropriate for high-pressure applications such as hydraulics in construction machinery and manufacturing equipment.
- Greater Efficiency: The efficiency of a gear pump depends on leakage/slippage that occurs between the teeth of gears and pump casing. External gears are designed to minimize this leakage since their teeth mesh very tightly thereby reducing slip back from outlet side to inlet side in case liquid being pumped is viscous. Therefore, the tight meshing ensures a more efficient pumping action which could be a critical requirement in many industrial applications.
- Simpler Design: Compared to Internal Gear Pumps, External Gear Pumps have simpler designs consisting of fewer moving parts. This simplicity makes manufacturing less costly vis-à-vis other pumps.A simpler design also means easier repair or maintenance.Technically their designs involve two similar intermeshing gears.Therefore it might be easier to make these equipments.The simplicity in design also allows for operation in harsh conditions without easily breaking down.
- More Compact Construction: One advantage of using an external gear pump is its compactness.For example due to containing all gears in a single casing outside these devices tend not occupy much space.This feature is particularly important when hydraulic power has to be fitted into a small space.
- Ease of Maintenance: External gear pumps are better maintained because they have simple designs. Furthermore components may be more accessible with symmetrical and easy-to-understand designs that allow for easy detection of problems and replacement of parts without the need for a specialist. As a result, the simplicity of their design lessens downtime in case it fails and can consequently minimize pump lifetime operational costs.
- Versatility: External gear pumps are able to handle thin to moderately viscous liquids. They have great application areas like oil and gas, automotive, chemical processing among others. The fact that they can be used with different fluids without much change in the design makes them preferable for most changing industries.
In summary external gear pump is advantageous over internal gear pump because it operates at higher pressures, has high efficiencies, simpler design, ease of maintenance and handles wider range of fluids. These benefits make external gear pumps a suitable choice for a wide range of industrial and mobile applications particularly where high pressures and efficiency are critical.
