Performance characteristics of gear pumps: The teeth of the two gears in a gear pump are separated, creating low pressure. Liquid is drawn in and pushed to the other side by the casing wall. The two gears on the other side then mesh together, creating high pressure to discharge the liquid.
Advantages of gear pumps: Simple and compact structure, small size, light weight, good manufacturability, low price, strong self-priming force, insensitive to oil contamination, wide speed range, able to withstand impact loads, easy maintenance, and reliable operation.
Disadvantages of gear pumps: Uneven radial force, large flow pulsation, high noise, low efficiency, poor interchangeability of parts, difficult to repair after wear, and cannot be used as a variable displacement pump.
