Tannhjulspumper

Tannhjulspumper, known in English as gear pumps, are positive displacement pumps that transfer fluid through meshing gears. The pump body typically contains two or more gear wheels that rotate in opposite directions, drawing fluid into the inlet chamber and forcing it out through the discharge. The basic mechanism is simple yet robust, making the pump suitable for a range of viscous liquids, including oils, fuels, water, and chemical solutions.

Gear pumps operate at a constant volumetric flow rate over a wide range of pressures, which allows precise metering and good pressure handling. They are commonly used in automotive fuel systems, hydraulic machinery, and the oil and gas industry. In the automotive sector, valve gear pumps are part of the fuel injection system, providing consistent fuel supply to the engine. Industrial gear pumps are often mounted on electric motors and integrated into recirculation or pressure irrigation circuits.

Advantages of gear pumps include their compact size, low noise, and durability under harsh operating conditions. They can handle solids and slurries due to the interlocking gear design, but their performance degrades with highly abrasive fluids. Maintenance is straightforward, involving periodic inspection of seals and bearings. Modern gear pumps incorporate corrosion-resistant alloys such as stainless steel or titanium, and materials such as PTFE for low-friction line. Overall, tannhjulspumper remain a staple in any application that demands reliable, self-acting fluid transport.