Final answer:
A gear-type pump is a positive displacement pump that utilizes the meshing of gears to move fluid. There are two primary types, external and internal gear pumps, utilized in various industries such as automotive and machinery lubrication.
Step-by-step explanation:
A gear-type pump is classified in the category of positive displacement pumps. These pumps operate by trapping a fixed amount of fluid and forcing (displacing) that trapped volume into the discharge pipe. The gear-type pump utilizes the meshing of gears to pump fluid by displacement. It is commonly used in various applications such as hydraulics, automotive, and machinery lubrication.
There are two main types of gear pumps: external gear pumps, where two separate gears rotate against each other, and internal gear pumps, where one gear (the rotor) is nested inside another gear (the idler). The rotation of gears creates a vacuum on the inlet side which pulls the fluid into the pump, the fluid then flows through the gaps between the gears, and the meshing gears release the fluid on the outlet side.