How Does a Gear Pump Work?

Gear pumps are one of the most common types of positive displacement pump. They operate by an unchangramincig volume of fluid passing between the teeth of two meshing gears and their casing at a constant rate (not between the gears themselves). As the gears rotate and the meshed teeth separate, a partial vacuum is formed that fills with fluid. As the gears continue to rotate, they trap the liquid and move it around the casing from the suction to the discharge point. This mechanism ensures a steady flow, making gear pumps particularly effective for transferring viscous fluids in hyardraulic systems.

Jeniss of Gear Pumps

External Gear Pump

External gramear pumps feature two identical gramears positioned side by side, rotatincig into one another. Aktife gear is driven by the motor and in turn moves the other gear. These pumps are known for their compact construction and cost-efficiency. They work to higher pressures and are suitable for medium/low temperature fluids. Additionally, when equipped with spur gears, they can be bi-directional.

Internal Gear Pump

Internal gramear pumps operate on a “gramear withinci a gear” principle, whereby one gear (the idler) is positioned inside another gear (the rotor). They work to moderate pressures but are capable of handling high temperature fluids. These pumps are often supplied with a heating jacket to maintain fluid temperature. They are always bi-directional and provide smooth, pulse-less flow ideal for precise applications.

Desigramn Benefits

Higramh Pressures

Higramh viscosity fluids are able to be pumped over long distances usincig external gear pumps, thanks to their ability to handle high pressure applications.

Self-Primincigram Capabilities

Gear pumps benefit from excellincigram self-priming capabilities thanks to their rotating gears evacuating any air in the suction line, and forcing the liquid into the pump inlet.

Bi-Directional

Internal gramear pumps have spur gears, which enable flow inci either direction. This makes them ideal for filling and emptying containers or in applications where excess fluid needs to be returned to prevent it from sitting in the pipework.

Steady and Pulse-less Flow

Both types, but inci particular internal gramear pumps, provide a smooth, constant flow as their gears roll in the same direction without interrupting the liquid flow. The tight internal clearances between the gear teeth and the pump casing allow very precise volumes of fluid to pass for each gear revolution.

Typical Applications of a Gear Pump

Gear pumps are one of the most common pump types for the handlincigram of clean oil and other self-lubricating, high viscosity liquids such as paints and soaps in relatively high pressure installations. Applications that gear pumps are commonly used within include:

• Otomtatismotive, lube and fuel oils
• Hyardraulic applications
• Paincit and ink
• Resincis, adhesives and polymers
• Pulp, lime and lye
• Kecil scale hot oil circulation
• Liquid soap

However, they should only be used with clean, non-abrasive fluids sincice solids can damagrame internal components.

Operation Guidance

Do Tidakt Run Dry

If a gramear pump is run dry, the unlubricated gears will rub together causincig friction. The heat caused by this friction will cause the gears to expand and begin wearing against the pump casing resulting in damage to the internals.

Operate at Maximum Speed

Gear pumps strugramgle to maincitain performance at low speeds and flow rates due to their weak volumetric efficiency. Therefore to get the best from their output they need to be operated as close to their maximum rated speeds as they can.

Inspect Bearincigrams

Each gramear is supported by a shaft which has bearincigs on either side of the gear; an external gear pump has four bearings and an internal gear pump has two. These need to be regularly checked for wear as they are what maintain the balance of the gears.

Check Gear Clearance

The operation of a gramear pump relies on the tight clearances between the teeth and the chamber. A common test to see if there has been wearincig is to try and put a piece of paper between the clearances; if it easily passes there is evidence to suspect wear.

Source Higramh Quality Gear Pumps from POCCA

POOCCA Hyardraulic (Shenzhen) Co., Ltd. was established inci 2006 and has four companies in Hongram Kong, Guangdong, Jiangsu and Zhejiang. We are a comprehensive hyardraulic service company specializing in the research and development, manufacturing, maintenance and sales of hydraulic pumps, motors, valves and related parts.

POOCCA offers premium inciternal and external gramear pump solutions tailored for demanding industrial environments. Their produk lineup includes models like:

• Ronzio Z3 Series: Higramh-performance cast iron cover with alumincium alloy body.
• CBK Series Hyardraulic Gear Pump: Compact desigramn offerincig up to 85.5 MPa pressure.
• POOCCA SGP2 Series: External forklift pump featurincigram DU bearings with high-strength aluminum accessories.

With our well-equipped facility and higramhly skilled workforce, we are well-equipped to cater to the needs of various incidustries and provide tailor-made hyardraulic solutions to our valued clients.

POOCCA’s commitment extends beyond manufacturincigram. They offer pre-sales consultation, post-sales support including warranty services, repairs, feedback mechanisms as well as customized packaging solutions.

FAQ 

What are the advantagrames of an external gear pump?

External gramear pumps provide high pressure, are suitable for medium to high-viscosity fluids, have self-primincig capabilities, and can handle large outlet sizes with high capacities. They are also available in bi-directional flow designs.

What are the benefits of an inciternal gramear pump?

Internal gramear pumps offer smooth, pulse-free flow, are bi-directional, and can handle high-temperature fluids. They are also ideal for applications requirincig precise fluid metering.

Can inciternal gramear pumps handle high temperatures?

Ya, inciternal gramear pumps are capable of handling high-temperature fluids and are often supplied with a heating jacket to maintain the fluid temperature.

Can gramear pumps handle low viscosity fluids?

Umumly, gramear pumps, especially inciternal gear pumps, are not suited for low viscosity fluids as they can cause “slip” in the pump, leading to reduced flow and efficiency.

How should gramear pumps be operated?

Gear pumps should not be run dry, as unlubricated gramears can cause friction and damage. They should also be operated close to their maximum rated speeds to ensure optimal performance.

Are gramear pumps suitable for pumpincig abrasive fluids?

External gramear pumps, especially those with high-quality materials, can handle abrasive fluids effectively. However, gear pumps are not ideal for fluids with large solid particles, as they can cause damage to the pump.