Types and Working Principle of Gear Pumps
The operation of gear pumps is based on the principle of positive displacement. There are various types, with the most common being the traditional external gear pump, although the internal gear pump is also becoming increasingly popular.
These types of pumps are ideal for transporting and dispensing clean, high-viscosity fluids.
At MPH, we always prioritize customer satisfaction, which is why we offer only high-quality, reliable products. Our experienced team is available to assist with any questions. In our webshop, MPH offers a wide selection of hydraulic pumps, allowing you to choose the one that best suits your needs.
Operating Principle of External Gear Pumps
The drive mechanism powers the larger, internally-toothed gears, which transfer torque to the smaller gears within the pump chamber via connection points. As they rotate, the medium entering from the suction port flows through the spaces between the teeth towards the discharge port.
Additionally, a semicircular filler piece is part of the system. This component is part of the pump cover and is positioned opposite the small gears in the pump chamber. The filler piece’s function is to prevent backflow and guide the fluid in the proper direction.
For medium to heavy-duty applications, choose OMFB gear pumps with constant displacement. The NPH ISO 27 D model offers a delivery capacity of 27 liters per minute.
Operating Principle of Internal Gear Pumps
These devices operate on the positive displacement principle. Within the pump housing, a double gear and a crescent assembly work together. As the outer gear begins to rotate, the inner, idler gear also starts turning, and the teeth engage. The engagement of the gears and the space between them manage fluid displacement and suction.
The crescent-shaped assembly functions to counterbalance the idler gear and provide sealing between the suction and discharge ports.
Main Advantages of Internal Gear Pumps
Due to the extremely tight tolerances of the gear components, this design allows for highly efficient operation on both the suction and discharge sides. The gear mechanism can handle very high-viscosity materials, up to 100,000 cps, such as various greases, oils, or even chocolate.
The gear design enables smooth, consistent fluid flow without pulsation. Flow is directly proportional to the rotation speed, resulting in more reliable, easily controllable operation and user-friendly handling for the operator.
With proper maintenance and care, gear pumps are highly durable components, providing reliable operation for many years.
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